resty

README

Resty

Simple HTTP and REST client library for Go (inspired by Ruby rest-client)

Features section describes in detail about Resty capabilities

Resty Communication Channels

News

• v2.7.0 released and tagged on Nov 03, 2021.
• v2.0.0 released and tagged on Jul 16, 2019.
• v1.12.0 released and tagged on Feb 27, 2019.
• v1.0 released and tagged on Sep 25, 2017. - Resty's first version was released on Sep 15, 2015 then it grew gradually as a very handy and helpful library. Its been a two years since first release. I'm very thankful to Resty users and its contributors.

Features

• GET, POST, PUT, DELETE, HEAD, PATCH, OPTIONS, etc.
• Simple and chainable methods for settings and request
• Request Body can be string, []byte, struct, map, slice and io.Reader too
  • Auto detects Content-Type
  • Buffer less processing for io.Reader
  • Native *http.Request instance may be accessed during middleware and request execution via Request.RawRequest
  • Request Body can be read multiple times via Request.RawRequest.GetBody()
• Response object gives you more possibility
  • Access as []byte array - response.Body() OR Access as string - response.String()
  • Know your response.Time() and when we response.ReceivedAt()
• Automatic marshal and unmarshal for JSON and XML content type
  • Default is JSON, if you supply struct/map without header Content-Type
  • For auto-unmarshal, refer to -
    • Success scenario Request.SetResult() and Response.Result().
    • Error scenario Request.SetError() and Response.Error().
    • Supports RFC7807 - application/problem+json & application/problem+xml
  • Resty provides an option to override JSON Marshal/Unmarshal and XML Marshal/Unmarshal
• Easy to upload one or more file(s) via multipart/form-data
  • Auto detects file content type
• Request URL Path Params (aka URI Params)
• Backoff Retry Mechanism with retry condition function reference
• Resty client HTTP & REST Request and Response middlewares
• Request.SetContext supported
• Authorization option of BasicAuth and Bearer token
• Set request ContentLength value for all request or particular request
• Custom Root Certificates and Client Certificates
• Download/Save HTTP response directly into File, like curl -o flag. See SetOutputDirectory & SetOutput.
• Cookies for your request and CookieJar support
• SRV Record based request instead of Host URL
• Client settings like Timeout, RedirectPolicy, Proxy, TLSClientConfig, Transport, etc.
• Optionally allows GET request with payload, see SetAllowGetMethodPayload
• Supports registering external JSON library into resty, see how to use
• Exposes Response reader without reading response (no auto-unmarshaling) if need be, see how to use
• Option to specify expected Content-Type when response Content-Type header missing. Refer to #92
• Resty design
  • Have client level settings & options and also override at Request level if you want to
  • Request and Response middleware
  • Create Multiple clients if you want to resty.New()
  • Supports http.RoundTripper implementation, see SetTransport
  • goroutine concurrent safe
  • Resty Client trace, see Client.EnableTrace and Request.EnableTrace
    • Since v2.4.0, trace info contains a RequestAttempt value, and the Request object contains an Attempt attribute
  • Debug mode - clean and informative logging presentation
  • Gzip - Go does it automatically also resty has fallback handling too
  • Works fine with HTTP/2 and HTTP/1.1
• Bazel support
• Easily mock Resty for testing, for e.g.
• Well tested client library

Included Batteries

• Redirect Policies - see how to use
  • NoRedirectPolicy
  • FlexibleRedirectPolicy
  • DomainCheckRedirectPolicy
  • etc. more info
• Retry Mechanism how to use
  • Backoff Retry
  • Conditional Retry
  • Since v2.6.0, Retry Hooks - Client, Request
• SRV Record based request instead of Host URL how to use
• etc (upcoming - throw your idea's here).

Supported Go Versions

Initially Resty started supporting go modules since v1.10.0 release.

Starting Resty v2 and higher versions, it fully embraces go modules package release. It requires a Go version capable of understanding /vN suffixed imports:

• 1.9.7+
• 1.10.3+
• 1.11+

It might be beneficial for your project 😄

Resty author also published following projects for Go Community.

• aah framework - A secure, flexible, rapid Go web framework.
• THUMBAI - Go Mod Repository, Go Vanity Service and Simple Proxy Server.
• go-model - Robust & Easy to use model mapper and utility methods for Go struct.

Installation

# Go Modules
require github.com/go-resty/resty/v2 v2.7.0

Usage

The following samples will assist you to become as comfortable as possible with resty library.

// Import resty into your code and refer it as `resty`.
import "github.com/go-resty/resty/v2"

Simple GET

// Create a Resty Client
client := resty.New()

resp, err := client.R().
    EnableTrace().
    Get("https://httpbin.org/get")

// Explore response object
fmt.Println("Response Info:")
fmt.Println("  Error      :", err)
fmt.Println("  Status Code:", resp.StatusCode())
fmt.Println("  Status     :", resp.Status())
fmt.Println("  Proto      :", resp.Proto())
fmt.Println("  Time       :", resp.Time())
fmt.Println("  Received At:", resp.ReceivedAt())
fmt.Println("  Body       :\n", resp)
fmt.Println()

// Explore trace info
fmt.Println("Request Trace Info:")
ti := resp.Request.TraceInfo()
fmt.Println("  DNSLookup     :", ti.DNSLookup)
fmt.Println("  ConnTime      :", ti.ConnTime)
fmt.Println("  TCPConnTime   :", ti.TCPConnTime)
fmt.Println("  TLSHandshake  :", ti.TLSHandshake)
fmt.Println("  ServerTime    :", ti.ServerTime)
fmt.Println("  ResponseTime  :", ti.ResponseTime)
fmt.Println("  TotalTime     :", ti.TotalTime)
fmt.Println("  IsConnReused  :", ti.IsConnReused)
fmt.Println("  IsConnWasIdle :", ti.IsConnWasIdle)
fmt.Println("  ConnIdleTime  :", ti.ConnIdleTime)
fmt.Println("  RequestAttempt:", ti.RequestAttempt)
fmt.Println("  RemoteAddr    :", ti.RemoteAddr.String())

/* Output
Response Info:
  Error      : <nil>
  Status Code: 200
  Status     : 200 OK
  Proto      : HTTP/2.0
  Time       : 457.034718ms
  Received At: 2020-09-14 15:35:29.784681 -0700 PDT m=+0.458137045
  Body       :
  {
    "args": {},
    "headers": {
      "Accept-Encoding": "gzip",
      "Host": "httpbin.org",
      "User-Agent": "go-resty/2.4.0 (https://github.com/go-resty/resty)",
      "X-Amzn-Trace-Id": "Root=1-5f5ff031-000ff6292204aa6898e4de49"
    },
    "origin": "0.0.0.0",
    "url": "https://httpbin.org/get"
  }

Request Trace Info:
  DNSLookup     : 4.074657ms
  ConnTime      : 381.709936ms
  TCPConnTime   : 77.428048ms
  TLSHandshake  : 299.623597ms
  ServerTime    : 75.414703ms
  ResponseTime  : 79.337µs
  TotalTime     : 457.034718ms
  IsConnReused  : false
  IsConnWasIdle : false
  ConnIdleTime  : 0s
  RequestAttempt: 1
  RemoteAddr    : 3.221.81.55:443
*/

Enhanced GET

// Create a Resty Client
client := resty.New()

resp, err := client.R().
      SetQueryParams(map[string]string{
          "page_no": "1",
          "limit": "20",
          "sort":"name",
          "order": "asc",
          "random":strconv.FormatInt(time.Now().Unix(), 10),
      }).
      SetHeader("Accept", "application/json").
      SetAuthToken("BC594900518B4F7EAC75BD37F019E08FBC594900518B4F7EAC75BD37F019E08F").
      Get("/search_result")


// Sample of using Request.SetQueryString method
resp, err := client.R().
      SetQueryString("productId=232&template=fresh-sample&cat=resty&source=google&kw=buy a lot more").
      SetHeader("Accept", "application/json").
      SetAuthToken("BC594900518B4F7EAC75BD37F019E08FBC594900518B4F7EAC75BD37F019E08F").
      Get("/show_product")


// If necessary, you can force response content type to tell Resty to parse a JSON response into your struct
resp, err := client.R().
      SetResult(result).
      ForceContentType("application/json").
      Get("v2/alpine/manifests/latest")

Various POST method combinations

// Create a Resty Client
client := resty.New()

// POST JSON string
// No need to set content type, if you have client level setting
resp, err := client.R().
      SetHeader("Content-Type", "application/json").
      SetBody(`{"username":"testuser", "password":"testpass"}`).
      SetResult(&AuthSuccess{}).    // or SetResult(AuthSuccess{}).
      Post("https://myapp.com/login")

// POST []byte array
// No need to set content type, if you have client level setting
resp, err := client.R().
      SetHeader("Content-Type", "application/json").
      SetBody([]byte(`{"username":"testuser", "password":"testpass"}`)).
      SetResult(&AuthSuccess{}).    // or SetResult(AuthSuccess{}).
      Post("https://myapp.com/login")

// POST Struct, default is JSON content type. No need to set one
resp, err := client.R().
      SetBody(User{Username: "testuser", Password: "testpass"}).
      SetResult(&AuthSuccess{}).    // or SetResult(AuthSuccess{}).
      SetError(&AuthError{}).       // or SetError(AuthError{}).
      Post("https://myapp.com/login")

// POST Map, default is JSON content type. No need to set one
resp, err := client.R().
      SetBody(map[string]interface{}{"username": "testuser", "password": "testpass"}).
      SetResult(&AuthSuccess{}).    // or SetResult(AuthSuccess{}).
      SetError(&AuthError{}).       // or SetError(AuthError{}).
      Post("https://myapp.com/login")

// POST of raw bytes for file upload. For example: upload file to Dropbox
fileBytes, _ := ioutil.ReadFile("/Users/jeeva/mydocument.pdf")

// See we are not setting content-type header, since go-resty automatically detects Content-Type for you
resp, err := client.R().
      SetBody(fileBytes).
      SetContentLength(true).          // Dropbox expects this value
      SetAuthToken("<your-auth-token>").
      SetError(&DropboxError{}).       // or SetError(DropboxError{}).
      Post("https://content.dropboxapi.com/1/files_put/auto/resty/mydocument.pdf") // for upload Dropbox supports PUT too

// Note: resty detects Content-Type for request body/payload if content type header is not set.
//   * For struct and map data type defaults to 'application/json'
//   * Fallback is plain text content type

Sample PUT

You can use various combinations of PUT method call like demonstrated for POST.

// Note: This is one sample of PUT method usage, refer POST for more combination

// Create a Resty Client
client := resty.New()

// Request goes as JSON content type
// No need to set auth token, error, if you have client level settings
resp, err := client.R().
      SetBody(Article{
        Title: "go-resty",
        Content: "This is my article content, oh ya!",
        Author: "Jeevanandam M",
        Tags: []string{"article", "sample", "resty"},
      }).
      SetAuthToken("C6A79608-782F-4ED0-A11D-BD82FAD829CD").
      SetError(&Error{}).       // or SetError(Error{}).
      Put("https://myapp.com/article/1234")

Sample PATCH

You can use various combinations of PATCH method call like demonstrated for POST.

// Note: This is one sample of PUT method usage, refer POST for more combination

// Create a Resty Client
client := resty.New()

// Request goes as JSON content type
// No need to set auth token, error, if you have client level settings
resp, err := client.R().
      SetBody(Article{
        Tags: []string{"new tag1", "new tag2"},
      }).
      SetAuthToken("C6A79608-782F-4ED0-A11D-BD82FAD829CD").
      SetError(&Error{}).       // or SetError(Error{}).
      Patch("https://myapp.com/articles/1234")

Sample DELETE, HEAD, OPTIONS

// Create a Resty Client
client := resty.New()

// DELETE a article
// No need to set auth token, error, if you have client level settings
resp, err := client.R().
      SetAuthToken("C6A79608-782F-4ED0-A11D-BD82FAD829CD").
      SetError(&Error{}).       // or SetError(Error{}).
      Delete("https://myapp.com/articles/1234")

// DELETE a articles with payload/body as a JSON string
// No need to set auth token, error, if you have client level settings
resp, err := client.R().
      SetAuthToken("C6A79608-782F-4ED0-A11D-BD82FAD829CD").
      SetError(&Error{}).       // or SetError(Error{}).
      SetHeader("Content-Type", "application/json").
      SetBody(`{article_ids: [1002, 1006, 1007, 87683, 45432] }`).
      Delete("https://myapp.com/articles")

// HEAD of resource
// No need to set auth token, if you have client level settings
resp, err := client.R().
      SetAuthToken("C6A79608-782F-4ED0-A11D-BD82FAD829CD").
      Head("https://myapp.com/videos/hi-res-video")

// OPTIONS of resource
// No need to set auth token, if you have client level settings
resp, err := client.R().
      SetAuthToken("C6A79608-782F-4ED0-A11D-BD82FAD829CD").
      Options("https://myapp.com/servers/nyc-dc-01")

Override JSON & XML Marshal/Unmarshal

User could register choice of JSON/XML library into resty or write your own. By default resty registers standard encoding/json and encoding/xml respectively.

// Example of registering json-iterator
import jsoniter "github.com/json-iterator/go"

json := jsoniter.ConfigCompatibleWithStandardLibrary

client := resty.New()
client.JSONMarshal = json.Marshal
client.JSONUnmarshal = json.Unmarshal

// similarly user could do for XML too with -
client.XMLMarshal
client.XMLUnmarshal

Multipart File(s) upload

Using io.Reader

profileImgBytes, _ := ioutil.ReadFile("/Users/jeeva/test-img.png")
notesBytes, _ := ioutil.ReadFile("/Users/jeeva/text-file.txt")

// Create a Resty Client
client := resty.New()

resp, err := client.R().
      SetFileReader("profile_img", "test-img.png", bytes.NewReader(profileImgBytes)).
      SetFileReader("notes", "text-file.txt", bytes.NewReader(notesBytes)).
      SetFormData(map[string]string{
          "first_name": "Jeevanandam",
          "last_name": "M",
      }).
      Post("http://myapp.com/upload")

Using File directly from Path

// Create a Resty Client
client := resty.New()

// Single file scenario
resp, err := client.R().
      SetFile("profile_img", "/Users/jeeva/test-img.png").
      Post("http://myapp.com/upload")

// Multiple files scenario
resp, err := client.R().
      SetFiles(map[string]string{
        "profile_img": "/Users/jeeva/test-img.png",
        "notes": "/Users/jeeva/text-file.txt",
      }).
      Post("http://myapp.com/upload")

// Multipart of form fields and files
resp, err := client.R().
      SetFiles(map[string]string{
        "profile_img": "/Users/jeeva/test-img.png",
        "notes": "/Users/jeeva/text-file.txt",
      }).
      SetFormData(map[string]string{
        "first_name": "Jeevanandam",
        "last_name": "M",
        "zip_code": "00001",
        "city": "my city",
        "access_token": "C6A79608-782F-4ED0-A11D-BD82FAD829CD",
      }).
      Post("http://myapp.com/profile")

Sample Form submission

// Create a Resty Client
client := resty.New()

// just mentioning about POST as an example with simple flow
// User Login
resp, err := client.R().
      SetFormData(map[string]string{
        "username": "jeeva",
        "password": "mypass",
      }).
      Post("http://myapp.com/login")

// Followed by profile update
resp, err := client.R().
      SetFormData(map[string]string{
        "first_name": "Jeevanandam",
        "last_name": "M",
        "zip_code": "00001",
        "city": "new city update",
      }).
      Post("http://myapp.com/profile")

// Multi value form data
criteria := url.Values{
  "search_criteria": []string{"book", "glass", "pencil"},
}
resp, err := client.R().
      SetFormDataFromValues(criteria).
      Post("http://myapp.com/search")

Save HTTP Response into File

// Create a Resty Client
client := resty.New()

// Setting output directory path, If directory not exists then resty creates one!
// This is optional one, if you're planning using absoule path in
// `Request.SetOutput` and can used together.
client.SetOutputDirectory("/Users/jeeva/Downloads")

// HTTP response gets saved into file, similar to curl -o flag
_, err := client.R().
          SetOutput("plugin/ReplyWithHeader-v5.1-beta.zip").
          Get("http://bit.ly/1LouEKr")

// OR using absolute path
// Note: output directory path is not used for absolute path
_, err := client.R().
          SetOutput("/MyDownloads/plugin/ReplyWithHeader-v5.1-beta.zip").
          Get("http://bit.ly/1LouEKr")

Request URL Path Params

Resty provides easy to use dynamic request URL path params. Params can be set at client and request level. Client level params value can be overridden at request level.

// Create a Resty Client
client := resty.New()

client.R().SetPathParams(map[string]string{
   "userId": "sample@sample.com",
   "subAccountId": "100002",
}).
Get("/v1/users/{userId}/{subAccountId}/details")

// Result:
//   Composed URL - /v1/users/sample@sample.com/100002/details

Request and Response Middleware

Resty provides middleware ability to manipulate for Request and Response. It is more flexible than callback approach.

// Create a Resty Client
client := resty.New()

// Registering Request Middleware
client.OnBeforeRequest(func(c *resty.Client, req *resty.Request) error {
    // Now you have access to Client and current Request object
    // manipulate it as per your need

    return nil  // if its success otherwise return error
  })

// Registering Response Middleware
client.OnAfterResponse(func(c *resty.Client, resp *resty.Response) error {
    // Now you have access to Client and current Response object
    // manipulate it as per your need

    return nil  // if its success otherwise return error
  })

OnError Hooks

Resty provides OnError hooks that may be called because:

• The client failed to send the request due to connection timeout, TLS handshake failure, etc...
• The request was retried the maximum amount of times, and still failed.

If there was a response from the server, the original error will be wrapped in *resty.ResponseError which contains the last response received.

// Create a Resty Client
client := resty.New()

client.OnError(func(req *resty.Request, err error) {
  if v, ok := err.(*resty.ResponseError); ok {
    // v.Response contains the last response from the server
    // v.Err contains the original error
  }
  // Log the error, increment a metric, etc...
})

Redirect Policy

Resty provides few ready to use redirect policy(s) also it supports multiple policies together.

// Create a Resty Client
client := resty.New()

// Assign Client Redirect Policy. Create one as per you need
client.SetRedirectPolicy(resty.FlexibleRedirectPolicy(15))

// Wanna multiple policies such as redirect count, domain name check, etc
client.SetRedirectPolicy(resty.FlexibleRedirectPolicy(20),
                        resty.DomainCheckRedirectPolicy("host1.com", "host2.org", "host3.net"))

Custom Redirect Policy

Implement RedirectPolicy interface and register it with resty client. Have a look redirect.go for more information.

// Create a Resty Client
client := resty.New()

// Using raw func into resty.SetRedirectPolicy
client.SetRedirectPolicy(resty.RedirectPolicyFunc(func(req *http.Request, via []*http.Request) error {
  // Implement your logic here

  // return nil for continue redirect otherwise return error to stop/prevent redirect
  return nil
}))

//---------------------------------------------------

// Using struct create more flexible redirect policy
type CustomRedirectPolicy struct {
  // variables goes here
}

func (c *CustomRedirectPolicy) Apply(req *http.Request, via []*http.Request) error {
  // Implement your logic here

  // return nil for continue redirect otherwise return error to stop/prevent redirect
  return nil
}

// Registering in resty
client.SetRedirectPolicy(CustomRedirectPolicy{/* initialize variables */})

Custom Root Certificates and Client Certificates

// Create a Resty Client
client := resty.New()

// Custom Root certificates, just supply .pem file.
// you can add one or more root certificates, its get appended
client.SetRootCertificate("/path/to/root/pemFile1.pem")
client.SetRootCertificate("/path/to/root/pemFile2.pem")
// ... and so on!

// Adding Client Certificates, you add one or more certificates
// Sample for creating certificate object
// Parsing public/private key pair from a pair of files. The files must contain PEM encoded data.
cert1, err := tls.LoadX509KeyPair("certs/client.pem", "certs/client.key")
if err != nil {
  log.Fatalf("ERROR client certificate: %s", err)
}
// ...

// You add one or more certificates
client.SetCertificates(cert1, cert2, cert3)

Custom Root Certificates and Client Certificates from string

// Custom Root certificates from string
// You can pass you certificates throught env variables as strings
// you can add one or more root certificates, its get appended
client.SetRootCertificateFromString("-----BEGIN CERTIFICATE-----content-----END CERTIFICATE-----")
client.SetRootCertificateFromString("-----BEGIN CERTIFICATE-----content-----END CERTIFICATE-----")
// ... and so on!

// Adding Client Certificates, you add one or more certificates
// Sample for creating certificate object
// Parsing public/private key pair from a pair of files. The files must contain PEM encoded data.
cert1, err := tls.X509KeyPair([]byte("-----BEGIN CERTIFICATE-----content-----END CERTIFICATE-----"), []byte("-----BEGIN CERTIFICATE-----content-----END CERTIFICATE-----"))
if err != nil {
  log.Fatalf("ERROR client certificate: %s", err)
}
// ...

// You add one or more certificates
client.SetCertificates(cert1, cert2, cert3)

Proxy Settings - Client as well as at Request Level

Default Go supports Proxy via environment variable HTTP_PROXY. Resty provides support via SetProxy & RemoveProxy. Choose as per your need.

Client Level Proxy settings applied to all the request

// Create a Resty Client
client := resty.New()

// Setting a Proxy URL and Port
client.SetProxy("http://proxyserver:8888")

// Want to remove proxy setting
client.RemoveProxy()

Retries

Resty uses backoff to increase retry intervals after each attempt.

Usage example:

// Create a Resty Client
client := resty.New()

// Retries are configured per client
client.
    // Set retry count to non zero to enable retries
    SetRetryCount(3).
    // You can override initial retry wait time.
    // Default is 100 milliseconds.
    SetRetryWaitTime(5 * time.Second).
    // MaxWaitTime can be overridden as well.
    // Default is 2 seconds.
    SetRetryMaxWaitTime(20 * time.Second).
    // SetRetryAfter sets callback to calculate wait time between retries.
    // Default (nil) implies exponential backoff with jitter
    SetRetryAfter(func(client *resty.Client, resp *resty.Response) (time.Duration, error) {
        return 0, errors.New("quota exceeded")
    })

Above setup will result in resty retrying requests returned non nil error up to 3 times with delay increased after each attempt.

You can optionally provide client with custom retry conditions:

// Create a Resty Client
client := resty.New()

client.AddRetryCondition(
    // RetryConditionFunc type is for retry condition function
    // input: non-nil Response OR request execution error
    func(r *resty.Response, err error) bool {
        return r.StatusCode() == http.StatusTooManyRequests
    },
)

Above example will make resty retry requests ended with 429 Too Many Requests status code.

Multiple retry conditions can be added.

It is also possible to use resty.Backoff(...) to get arbitrary retry scenarios implemented. Reference.

Allow GET request with Payload

// Create a Resty Client
client := resty.New()

// Allow GET request with Payload. This is disabled by default.
client.SetAllowGetMethodPayload(true)

Wanna Multiple Clients

// Here you go!
// Client 1
client1 := resty.New()
client1.R().Get("http://httpbin.org")
// ...

// Client 2
client2 := resty.New()
client2.R().Head("http://httpbin.org")
// ...

// Bend it as per your need!!!

Remaining Client Settings & its Options

// Create a Resty Client
client := resty.New()

// Unique settings at Client level
//--------------------------------
// Enable debug mode
client.SetDebug(true)

// Assign Client TLSClientConfig
// One can set custom root-certificate. Refer: http://golang.org/pkg/crypto/tls/#example_Dial
client.SetTLSClientConfig(&tls.Config{ RootCAs: roots })

// or One can disable security check (https)
client.SetTLSClientConfig(&tls.Config{ InsecureSkipVerify: true })

// Set client timeout as per your need
client.SetTimeout(1 * time.Minute)


// You can override all below settings and options at request level if you want to
//--------------------------------------------------------------------------------
// Host URL for all request. So you can use relative URL in the request
client.SetHostURL("http://httpbin.org")

// Headers for all request
client.SetHeader("Accept", "application/json")
client.SetHeaders(map[string]string{
        "Content-Type": "application/json",
        "User-Agent": "My custom User Agent String",
      })

// Cookies for all request
client.SetCookie(&http.Cookie{
      Name:"go-resty",
      Value:"This is cookie value",
      Path: "/",
      Domain: "sample.com",
      MaxAge: 36000,
      HttpOnly: true,
      Secure: false,
    })
client.SetCookies(cookies)

// URL query parameters for all request
client.SetQueryParam("user_id", "00001")
client.SetQueryParams(map[string]string{ // sample of those who use this manner
      "api_key": "api-key-here",
      "api_secert": "api-secert",
    })
client.R().SetQueryString("productId=232&template=fresh-sample&cat=resty&source=google&kw=buy a lot more")

// Form data for all request. Typically used with POST and PUT
client.SetFormData(map[string]string{
    "access_token": "BC594900-518B-4F7E-AC75-BD37F019E08F",
  })

// Basic Auth for all request
client.SetBasicAuth("myuser", "mypass")

// Bearer Auth Token for all request
client.SetAuthToken("BC594900518B4F7EAC75BD37F019E08FBC594900518B4F7EAC75BD37F019E08F")

// Enabling Content length value for all request
client.SetContentLength(true)

// Registering global Error object structure for JSON/XML request
client.SetError(&Error{})    // or resty.SetError(Error{})

Unix Socket

unixSocket := "/var/run/my_socket.sock"

// Create a Go's http.Transport so we can set it in resty.
transport := http.Transport{
	Dial: func(_, _ string) (net.Conn, error) {
		return net.Dial("unix", unixSocket)
	},
}

// Create a Resty Client
client := resty.New()

// Set the previous transport that we created, set the scheme of the communication to the
// socket and set the unixSocket as the HostURL.
client.SetTransport(&transport).SetScheme("http").SetHostURL(unixSocket)

// No need to write the host's URL on the request, just the path.
client.R().Get("/index.html")

Bazel Support

Resty can be built, tested and depended upon via Bazel. For example, to run all tests:

bazel test :resty_test

Mocking http requests using httpmock library

In order to mock the http requests when testing your application you could use the httpmock library.

When using the default resty client, you should pass the client to the library as follow:

// Create a Resty Client
client := resty.New()

// Get the underlying HTTP Client and set it to Mock
httpmock.ActivateNonDefault(client.GetClient())

More detailed example of mocking resty http requests using ginko could be found here.

Versioning

Resty releases versions according to Semantic Versioning

• Resty v2 does not use gopkg.in service for library versioning.
• Resty fully adapted to go mod capabilities since v1.10.0 release.
• Resty v1 series was using gopkg.in to provide versioning. gopkg.in/resty.vX points to appropriate tagged versions; X denotes version series number and it's a stable release for production use. For e.g. gopkg.in/resty.v0.
• Development takes place at the master branch. Although the code in master should always compile and test successfully, it might break API's. I aim to maintain backwards compatibility, but sometimes API's and behavior might be changed to fix a bug.

Contribution

I would welcome your contribution! If you find any improvement or issue you want to fix, feel free to send a pull request, I like pull requests that include test cases for fix/enhancement. I have done my best to bring pretty good code coverage. Feel free to write tests.

BTW, I'd like to know what you think about Resty. Kindly open an issue or send me an email; it'd mean a lot to me.

Creator

Jeevanandam M. (jeeva@myjeeva.com)

Core Team

Have a look on Members page.

Contributors

Have a look on Contributors page.

License

Resty released under MIT license, refer LICENSE file.

Documentation

Overview

Package resty provides Simple HTTP and REST client library for Go.

Example (ClientCertificates)

// Parsing public/private key pair from a pair of files. The files must contain PEM encoded data.
cert, err := tls.LoadX509KeyPair("certs/client.pem", "certs/client.key")
if err != nil {
	log.Fatalf("ERROR client certificate: %s", err)
}

// Create a resty client
client := resty.New()

client.SetCertificates(cert)

Example (CustomRootCertificate)

// Create a resty client
client := resty.New()
client.SetRootCertificate("/path/to/root/pemFile.pem")

Example (DropboxUpload)

// For example: upload file to Dropbox
// POST of raw bytes for file upload.
file, _ := os.Open("/Users/jeeva/mydocument.pdf")
fileBytes, _ := ioutil.ReadAll(file)

// Create a resty client
client := resty.New()

// See we are not setting content-type header, since go-resty automatically detects Content-Type for you
resp, err := client.R().
	SetBody(fileBytes).     // resty autodetects content type
	SetContentLength(true). // Dropbox expects this value
	SetAuthToken("<your-auth-token>").
	SetError(DropboxError{}).
	Post("https://content.dropboxapi.com/1/files_put/auto/resty/mydocument.pdf") // you can use PUT method too dropbox supports it

// Output print
fmt.Printf("\nError: %v\n", err)
fmt.Printf("Time: %v\n", resp.Time())
fmt.Printf("Body: %v\n", resp)

Example (EnhancedGet)

// Create a resty client
client := resty.New()

resp, err := client.R().
	SetQueryParams(map[string]string{
		"page_no": "1",
		"limit":   "20",
		"sort":    "name",
		"order":   "asc",
		"random":  strconv.FormatInt(time.Now().Unix(), 10),
	}).
	SetHeader("Accept", "application/json").
	SetAuthToken("BC594900518B4F7EAC75BD37F019E08FBC594900518B4F7EAC75BD37F019E08F").
	Get("/search_result")

printOutput(resp, err)

Example (Get)

// Create a resty client
client := resty.New()

resp, err := client.R().Get("http://httpbin.org/get")

fmt.Printf("\nError: %v", err)
fmt.Printf("\nResponse Status Code: %v", resp.StatusCode())
fmt.Printf("\nResponse Status: %v", resp.Status())
fmt.Printf("\nResponse Body: %v", resp)
fmt.Printf("\nResponse Time: %v", resp.Time())
fmt.Printf("\nResponse Received At: %v", resp.ReceivedAt())

Example (Post)

// Create a resty client
client := resty.New()

// POST JSON string
// No need to set content type, if you have client level setting
resp, err := client.R().
	SetHeader("Content-Type", "application/json").
	SetBody(`{"username":"testuser", "password":"testpass"}`).
	SetResult(AuthSuccess{}). // or SetResult(&AuthSuccess{}).
	Post("https://myapp.com/login")

printOutput(resp, err)

// POST []byte array
// No need to set content type, if you have client level setting
resp1, err1 := client.R().
	SetHeader("Content-Type", "application/json").
	SetBody([]byte(`{"username":"testuser", "password":"testpass"}`)).
	SetResult(AuthSuccess{}). // or SetResult(&AuthSuccess{}).
	Post("https://myapp.com/login")

printOutput(resp1, err1)

// POST Struct, default is JSON content type. No need to set one
resp2, err2 := client.R().
	SetBody(resty.User{Username: "testuser", Password: "testpass"}).
	SetResult(&AuthSuccess{}). // or SetResult(AuthSuccess{}).
	SetError(&AuthError{}).    // or SetError(AuthError{}).
	Post("https://myapp.com/login")

printOutput(resp2, err2)

// POST Map, default is JSON content type. No need to set one
resp3, err3 := client.R().
	SetBody(map[string]interface{}{"username": "testuser", "password": "testpass"}).
	SetResult(&AuthSuccess{}). // or SetResult(AuthSuccess{}).
	SetError(&AuthError{}).    // or SetError(AuthError{}).
	Post("https://myapp.com/login")

printOutput(resp3, err3)

Example (Put)

// Create a resty client
client := resty.New()

// Just one sample of PUT, refer POST for more combination
// request goes as JSON content type
// No need to set auth token, error, if you have client level settings
resp, err := client.R().
	SetBody(Article{
		Title:   "go-resty",
		Content: "This is my article content, oh ya!",
		Author:  "Jeevanandam M",
		Tags:    []string{"article", "sample", "resty"},
	}).
	SetAuthToken("C6A79608-782F-4ED0-A11D-BD82FAD829CD").
	SetError(&Error{}). // or SetError(Error{}).
	Put("https://myapp.com/article/1234")

printOutput(resp, err)

Example (Socks5Proxy)

// create a dialer
dialer, err := proxy.SOCKS5("tcp", "127.0.0.1:9150", nil, proxy.Direct)
if err != nil {
	log.Fatalf("Unable to obtain proxy dialer: %v\n", err)
}

// create a transport
ptransport := &http.Transport{Dial: dialer.Dial}

// Create a resty client
client := resty.New()

// set transport into resty
client.SetTransport(ptransport)

resp, err := client.R().Get("http://check.torproject.org")
fmt.Println(err, resp)

Index

• Constants
• func Backoff(operation func() (*Response, error), options ...Option) error
• func DetectContentType(body interface{}) string
• func IsJSONType(ct string) bool
• func IsStringEmpty(str string) bool
• func IsXMLType(ct string) bool
• func Unmarshalc(c *Client, ct string, b []byte, d interface{}) (err error)
• type Client
  • func New() *Client
  • func NewWithClient(hc *http.Client) *Client
  • func NewWithLocalAddr(localAddr net.Addr) *Client
  • func (c *Client) AddRetryAfterErrorCondition() *Client
  • func (c *Client) AddRetryCondition(condition RetryConditionFunc) *Client
  • func (c *Client) AddRetryHook(hook OnRetryFunc) *Client
  • func (c *Client) DisableTrace() *Client
  • func (c *Client) EnableTrace() *Client
  • func (c *Client) GetClient() *http.Client
  • func (c *Client) IsProxySet() bool
  • func (c *Client) NewRequest() *Request
  • func (c *Client) OnAfterResponse(m ResponseMiddleware) *Client
  • func (c *Client) OnBeforeRequest(m RequestMiddleware) *Client
  • func (c *Client) OnError(h ErrorHook) *Client
  • func (c *Client) OnRequestLog(rl RequestLogCallback) *Client
  • func (c *Client) OnResponseLog(rl ResponseLogCallback) *Client
  • func (c *Client) R() *Request
  • func (c *Client) RemoveProxy() *Client
  • func (c *Client) SetAllowGetMethodPayload(a bool) *Client
  • func (c *Client) SetAuthScheme(scheme string) *Client
  • func (c *Client) SetAuthToken(token string) *Client
  • func (c *Client) SetBaseURL(url string) *Client
  • func (c *Client) SetBasicAuth(username, password string) *Client
  • func (c *Client) SetCertificates(certs ...tls.Certificate) *Client
  • func (c *Client) SetCloseConnection(close bool) *Client
  • func (c *Client) SetContentLength(l bool) *Client
  • func (c *Client) SetCookie(hc *http.Cookie) *Client
  • func (c *Client) SetCookieJar(jar http.CookieJar) *Client
  • func (c *Client) SetCookies(cs []*http.Cookie) *Client
  • func (c *Client) SetDebug(d bool) *Client
  • func (c *Client) SetDebugBodyLimit(sl int64) *Client
  • func (c *Client) SetDisableWarn(d bool) *Client
  • func (c *Client) SetDoNotParseResponse(parse bool) *Client
  • func (c *Client) SetError(err interface{}) *Client
  • func (c *Client) SetFormData(data map[string]string) *Client
  • func (c *Client) SetHeader(header, value string) *Client
  • func (c *Client) SetHeaderVerbatim(header, value string) *Client
  • func (c *Client) SetHeaders(headers map[string]string) *Client
  • func (c *Client) SetHostURL(url string) *Client
  • func (c *Client) SetJSONEscapeHTML(b bool) *Client
  • func (c *Client) SetLogger(l Logger) *Client
  • func (c *Client) SetOutputDirectory(dirPath string) *Client
  • func (c *Client) SetPathParam(param, value string) *Client
  • func (c *Client) SetPathParams(params map[string]string) *Client
  • func (c *Client) SetPreRequestHook(h PreRequestHook) *Client
  • func (c *Client) SetProxy(proxyURL string) *Client
  • func (c *Client) SetQueryParam(param, value string) *Client
  • func (c *Client) SetQueryParams(params map[string]string) *Client
  • func (c *Client) SetRedirectPolicy(policies ...interface{}) *Client
  • func (c *Client) SetRetryAfter(callback RetryAfterFunc) *Client
  • func (c *Client) SetRetryCount(count int) *Client
  • func (c *Client) SetRetryMaxWaitTime(maxWaitTime time.Duration) *Client
  • func (c *Client) SetRetryWaitTime(waitTime time.Duration) *Client
  • func (c *Client) SetRootCertificate(pemFilePath string) *Client
  • func (c *Client) SetRootCertificateFromString(pemContent string) *Client
  • func (c *Client) SetScheme(scheme string) *Client
  • func (c *Client) SetTLSClientConfig(config *tls.Config) *Client
  • func (c *Client) SetTimeout(timeout time.Duration) *Client
  • func (c *Client) SetTransport(transport http.RoundTripper) *Client
• type ErrorHook
• type File
  • func (f *File) String() string
• type Logger
• type MultipartField
• type OnRetryFunc
• type Option
  • func MaxWaitTime(value time.Duration) Option
  • func Retries(value int) Option
  • func RetryConditions(conditions []RetryConditionFunc) Option
  • func RetryHooks(hooks []OnRetryFunc) Option
  • func WaitTime(value time.Duration) Option
• type Options
• type PreRequestHook
• type RedirectPolicy
  • func DomainCheckRedirectPolicy(hostnames ...string) RedirectPolicy
  • func FlexibleRedirectPolicy(noOfRedirect int) RedirectPolicy
  • func NoRedirectPolicy() RedirectPolicy
• type RedirectPolicyFunc
  • func (f RedirectPolicyFunc) Apply(req *http.Request, via []*http.Request) error
• type Request
  • func (r *Request) AddRetryCondition(condition RetryConditionFunc) *Request
  • func (r *Request) Context() context.Context
  • func (r *Request) Delete(url string) (*Response, error)
  • func (r *Request) EnableTrace() *Request
  • func (r *Request) Execute(method, url string) (*Response, error)
  • func (r *Request) ExpectContentType(contentType string) *Request
  • func (r *Request) ForceContentType(contentType string) *Request
  • func (r *Request) Get(url string) (*Response, error)
  • func (r *Request) Head(url string) (*Response, error)
  • func (r *Request) Options(url string) (*Response, error)
  • func (r *Request) Patch(url string) (*Response, error)
  • func (r *Request) Post(url string) (*Response, error)
  • func (r *Request) Put(url string) (*Response, error)
  • func (r *Request) Send() (*Response, error)
  • func (r *Request) SetAuthScheme(scheme string) *Request
  • func (r *Request) SetAuthToken(token string) *Request
  • func (r *Request) SetBasicAuth(username, password string) *Request
  • func (r *Request) SetBody(body interface{}) *Request
  • func (r *Request) SetContentLength(l bool) *Request
  • func (r *Request) SetContext(ctx context.Context) *Request
  • func (r *Request) SetCookie(hc *http.Cookie) *Request
  • func (r *Request) SetCookies(rs []*http.Cookie) *Request
  • func (r *Request) SetDoNotParseResponse(parse bool) *Request
  • func (r *Request) SetError(err interface{}) *Request
  • func (r *Request) SetFile(param, filePath string) *Request
  • func (r *Request) SetFileReader(param, fileName string, reader io.Reader) *Request
  • func (r *Request) SetFiles(files map[string]string) *Request
  • func (r *Request) SetFormData(data map[string]string) *Request
  • func (r *Request) SetFormDataFromValues(data url.Values) *Request
  • func (r *Request) SetHeader(header, value string) *Request
  • func (r *Request) SetHeaderMultiValues(headers map[string][]string) *Request
  • func (r *Request) SetHeaderVerbatim(header, value string) *Request
  • func (r *Request) SetHeaders(headers map[string]string) *Request
  • func (r *Request) SetJSONEscapeHTML(b bool) *Request
  • func (r *Request) SetMultipartField(param, fileName, contentType string, reader io.Reader) *Request
  • func (r *Request) SetMultipartFields(fields ...*MultipartField) *Request
  • func (r *Request) SetMultipartFormData(data map[string]string) *Request
  • func (r *Request) SetOutput(file string) *Request
  • func (r *Request) SetPathParam(param, value string) *Request
  • func (r *Request) SetPathParams(params map[string]string) *Request
  • func (r *Request) SetQueryParam(param, value string) *Request
  • func (r *Request) SetQueryParams(params map[string]string) *Request
  • func (r *Request) SetQueryParamsFromValues(params url.Values) *Request
  • func (r *Request) SetQueryString(query string) *Request
  • func (r *Request) SetResult(res interface{}) *Request
  • func (r *Request) SetSRV(srv *SRVRecord) *Request
  • func (r *Request) TraceInfo() TraceInfo
• type RequestLog
• type RequestLogCallback
• type RequestMiddleware
• type Response
  • func (r *Response) Body() []byte
  • func (r *Response) Cookies() []*http.Cookie
  • func (r *Response) Error() interface{}
  • func (r *Response) Header() http.Header
  • func (r *Response) IsError() bool
  • func (r *Response) IsSuccess() bool
  • func (r *Response) Proto() string
  • func (r *Response) RawBody() io.ReadCloser
  • func (r *Response) ReceivedAt() time.Time
  • func (r *Response) Result() interface{}
  • func (r *Response) Size() int64
  • func (r *Response) Status() string
  • func (r *Response) StatusCode() int
  • func (r *Response) String() string
  • func (r *Response) Time() time.Duration
• type ResponseError
  • func (e *ResponseError) Error() string
  • func (e *ResponseError) Unwrap() error
• type ResponseLog
• type ResponseLogCallback
• type ResponseMiddleware
• type RetryAfterFunc
• type RetryConditionFunc
• type SRVRecord
• type TraceInfo
• type User

Examples

• Package (ClientCertificates)
• Package (CustomRootCertificate)
• Package (DropboxUpload)
• Package (EnhancedGet)
• Package (Get)
• Package (Post)
• Package (Put)
• Package (Socks5Proxy)
• Client.SetCertificates
• New

Constants

const (
	// MethodGet HTTP method
	MethodGet = "GET"

	// MethodPost HTTP method
	MethodPost = "POST"

	// MethodPut HTTP method
	MethodPut = "PUT"

	// MethodDelete HTTP method
	MethodDelete = "DELETE"

	// MethodPatch HTTP method
	MethodPatch = "PATCH"

	// MethodHead HTTP method
	MethodHead = "HEAD"

	// MethodOptions HTTP method
	MethodOptions = "OPTIONS"
)

const Version = "2.7.3"

Version # of resty

Functions

func Backoff

func Backoff(operation func() (*Response, error), options ...Option) error

Backoff retries with increasing timeout duration up until X amount of retries (Default is 3 attempts, Override with option Retries(n))

func DetectContentType

func DetectContentType(body interface{}) string

DetectContentType method is used to figure out `Request.Body` content type for request header

func IsJSONType

func IsJSONType(ct string) bool

IsJSONType method is to check JSON content type or not

func IsStringEmpty

func IsStringEmpty(str string) bool

IsStringEmpty method tells whether given string is empty or not

func IsXMLType

func IsXMLType(ct string) bool

IsXMLType method is to check XML content type or not

func Unmarshalc

func Unmarshalc(c *Client, ct string, b []byte, d interface{}) (err error)

Unmarshalc content into object from JSON or XML

Types

type Client

type Client struct {
	BaseURL               string
	HostURL               string // Deprecated: use BaseURL instead. To be removed in v3.0.0 release.
	QueryParam            url.Values
	FormData              url.Values
	PathParams            map[string]string
	Header                http.Header
	UserInfo              *User
	Token                 string
	AuthScheme            string
	Cookies               []*http.Cookie
	Error                 reflect.Type
	Debug                 bool
	DisableWarn           bool
	AllowGetMethodPayload bool
	RetryCount            int
	RetryWaitTime         time.Duration
	RetryMaxWaitTime      time.Duration
	RetryConditions       []RetryConditionFunc
	RetryHooks            []OnRetryFunc
	RetryAfter            RetryAfterFunc
	JSONMarshal           func(v interface{}) ([]byte, error)
	JSONUnmarshal         func(data []byte, v interface{}) error
	XMLMarshal            func(v interface{}) ([]byte, error)
	XMLUnmarshal          func(data []byte, v interface{}) error

	// HeaderAuthorizationKey is used to set/access Request Authorization header
	// value when `SetAuthToken` option is used.
	HeaderAuthorizationKey string
	// contains filtered or unexported fields
}

Client struct is used to create Resty client with client level settings, these settings are applicable to all the request raised from the client.

Resty also provides an options to override most of the client settings at request level.

func New

func New() *Client

New method creates a new Resty client.

Example

// Creating client1
client1 := resty.New()
resp1, err1 := client1.R().Get("http://httpbin.org/get")
fmt.Println(resp1, err1)

// Creating client2
client2 := resty.New()
resp2, err2 := client2.R().Get("http://httpbin.org/get")
fmt.Println(resp2, err2)

func NewWithClient

func NewWithClient(hc *http.Client) *Client

NewWithClient method creates a new Resty client with given `http.Client`.

func NewWithLocalAddr

func NewWithLocalAddr(localAddr net.Addr) *Client

NewWithLocalAddr method creates a new Resty client with given Local Address to dial from.

func (*Client) AddRetryAfterErrorCondition

func (c *Client) AddRetryAfterErrorCondition() *Client

AddRetryAfterErrorCondition adds the basic condition of retrying after encountering an error from the http response

Since v2.6.0

func (*Client) AddRetryCondition

func (c *Client) AddRetryCondition(condition RetryConditionFunc) *Client

AddRetryCondition method adds a retry condition function to array of functions that are checked to determine if the request is retried. The request will retry if any of the functions return true and error is nil.

Note: These retry conditions are applied on all Request made using this Client. For Request specific retry conditions check *Request.AddRetryCondition

func (*Client) AddRetryHook

func (c *Client) AddRetryHook(hook OnRetryFunc) *Client

AddRetryHook adds a side-effecting retry hook to an array of hooks that will be executed on each retry.

Since v2.6.0

func (*Client) DisableTrace

func (c *Client) DisableTrace() *Client

DisableTrace method disables the Resty client trace. Refer to `Client.EnableTrace`.

Since v2.0.0

func (*Client) EnableTrace

func (c *Client) EnableTrace() *Client

EnableTrace method enables the Resty client trace for the requests fired from the client using `httptrace.ClientTrace` and provides insights.

client := resty.New().EnableTrace()

resp, err := client.R().Get("https://httpbin.org/get")
fmt.Println("Error:", err)
fmt.Println("Trace Info:", resp.Request.TraceInfo())

Also `Request.EnableTrace` available too to get trace info for single request.

Since v2.0.0

func (*Client) GetClient

func (c *Client) GetClient() *http.Client

GetClient method returns the current `http.Client` used by the resty client.

func (*Client) IsProxySet

func (c *Client) IsProxySet() bool

IsProxySet method returns the true is proxy is set from resty client otherwise false. By default proxy is set from environment, refer to `http.ProxyFromEnvironment`.

func (*Client) NewRequest

func (c *Client) NewRequest() *Request

NewRequest is an alias for method `R()`. Creates a new request instance, its used for Get, Post, Put, Delete, Patch, Head, Options, etc.

func (*Client) OnAfterResponse

func (c *Client) OnAfterResponse(m ResponseMiddleware) *Client

OnAfterResponse method appends response middleware into the after response chain. Once we receive response from host server, default Resty response middleware gets applied and then user assigened response middlewares applied.

client.OnAfterResponse(func(c *resty.Client, r *resty.Response) error {
		// Now you have access to Client and Response instance
		// manipulate it as per your need

		return nil 	// if its success otherwise return error
	})

func (*Client) OnBeforeRequest

func (c *Client) OnBeforeRequest(m RequestMiddleware) *Client

OnBeforeRequest method appends request middleware into the before request chain. Its gets applied after default Resty request middlewares and before request been sent from Resty to host server.

client.OnBeforeRequest(func(c *resty.Client, r *resty.Request) error {
		// Now you have access to Client and Request instance
		// manipulate it as per your need

		return nil 	// if its success otherwise return error
	})

func (*Client) OnError

func (c *Client) OnError(h ErrorHook) *Client

OnError method adds a callback that will be run whenever a request execution fails. This is called after all retries have been attempted (if any). If there was a response from the server, the error will be wrapped in *ResponseError which has the last response received from the server.

client.OnError(func(req *resty.Request, err error) {
	if v, ok := err.(*resty.ResponseError); ok {
		// Do something with v.Response
	}
	// Log the error, increment a metric, etc...
})

func (*Client) OnRequestLog

func (c *Client) OnRequestLog(rl RequestLogCallback) *Client

OnRequestLog method used to set request log callback into Resty. Registered callback gets called before the resty actually logs the information.

func (*Client) OnResponseLog

func (c *Client) OnResponseLog(rl ResponseLogCallback) *Client

OnResponseLog method used to set response log callback into Resty. Registered callback gets called before the resty actually logs the information.

func (*Client) R

func (c *Client) R() *Request

R method creates a new request instance, its used for Get, Post, Put, Delete, Patch, Head, Options, etc.

func (*Client) RemoveProxy

func (c *Client) RemoveProxy() *Client

RemoveProxy method removes the proxy configuration from Resty client

client.RemoveProxy()

func (*Client) SetAllowGetMethodPayload

func (c *Client) SetAllowGetMethodPayload(a bool) *Client

SetAllowGetMethodPayload method allows the GET method with payload on Resty client.

For Example: Resty allows the user sends request with a payload on HTTP GET method.

client.SetAllowGetMethodPayload(true)

func (*Client) SetAuthScheme

func (c *Client) SetAuthScheme(scheme string) *Client

SetAuthScheme method sets the auth scheme type in the HTTP request. For Example:

Authorization: <auth-scheme-value> <auth-token-value>

For Example: To set the scheme to use OAuth

client.SetAuthScheme("OAuth")

This auth scheme gets added to all the requests rasied from this client instance. Also it can be overridden or set one at the request level is supported.

Information about auth schemes can be found in RFC7235 which is linked to below along with the page containing the currently defined official authentication schemes:

https://tools.ietf.org/html/rfc7235
https://www.iana.org/assignments/http-authschemes/http-authschemes.xhtml#authschemes

See `Request.SetAuthToken`.

func (*Client) SetAuthToken

func (c *Client) SetAuthToken(token string) *Client

SetAuthToken method sets the auth token of the `Authorization` header for all HTTP requests. The default auth scheme is `Bearer`, it can be customized with the method `SetAuthScheme`. For Example:

Authorization: <auth-scheme> <auth-token-value>

For Example: To set auth token BC594900518B4F7EAC75BD37F019E08FBC594900518B4F7EAC75BD37F019E08F

client.SetAuthToken("BC594900518B4F7EAC75BD37F019E08FBC594900518B4F7EAC75BD37F019E08F")

This auth token gets added to all the requests rasied from this client instance. Also it can be overridden or set one at the request level is supported.

See `Request.SetAuthToken`.

func (*Client) SetBaseURL

func (c *Client) SetBaseURL(url string) *Client

SetBaseURL method is to set Base URL in the client instance. It will be used with request raised from this client with relative URL

// Setting HTTP address
client.SetBaseURL("http://myjeeva.com")

// Setting HTTPS address
client.SetBaseURL("https://myjeeva.com")

Since v2.7.0

func (*Client) SetBasicAuth

func (c *Client) SetBasicAuth(username, password string) *Client

SetBasicAuth method sets the basic authentication header in the HTTP request. For Example:

Authorization: Basic <base64-encoded-value>

For Example: To set the header for username "go-resty" and password "welcome"

client.SetBasicAuth("go-resty", "welcome")

This basic auth information gets added to all the request rasied from this client instance. Also it can be overridden or set one at the request level is supported.

See `Request.SetBasicAuth`.

func (*Client) SetCertificates

func (c *Client) SetCertificates(certs ...tls.Certificate) *Client

SetCertificates method helps to set client certificates into Resty conveniently.

Example

// Parsing public/private key pair from a pair of files. The files must contain PEM encoded data.
cert, err := tls.LoadX509KeyPair("certs/client.pem", "certs/client.key")
if err != nil {
	log.Fatalf("ERROR client certificate: %s", err)
}

// Create a resty client
client := resty.New()

client.SetCertificates(cert)

func (*Client) SetCloseConnection

func (c *Client) SetCloseConnection(close bool) *Client

SetCloseConnection method sets variable `Close` in http request struct with the given value. More info: https://golang.org/src/net/http/request.go

func (*Client) SetContentLength

func (c *Client) SetContentLength(l bool) *Client

SetContentLength method enables the HTTP header `Content-Length` value for every request. By default Resty won't set `Content-Length`.

client.SetContentLength(true)

Also you have an option to enable for particular request. See `Request.SetContentLength`

func (*Client) SetCookie

func (c *Client) SetCookie(hc *http.Cookie) *Client

SetCookie method appends a single cookie in the client instance. These cookies will be added to all the request raised from this client instance.

client.SetCookie(&http.Cookie{
			Name:"go-resty",
			Value:"This is cookie value",
		})

func (*Client) SetCookieJar

func (c *Client) SetCookieJar(jar http.CookieJar) *Client

SetCookieJar method sets custom http.CookieJar in the resty client. Its way to override default.

For Example: sometimes we don't want to save cookies in api contacting, we can remove the default CookieJar in resty client.

client.SetCookieJar(nil)

func (*Client) SetCookies

func (c *Client) SetCookies(cs []*http.Cookie) *Client

SetCookies method sets an array of cookies in the client instance. These cookies will be added to all the request raised from this client instance.

cookies := []*http.Cookie{
	&http.Cookie{
		Name:"go-resty-1",
		Value:"This is cookie 1 value",
	},
	&http.Cookie{
		Name:"go-resty-2",
		Value:"This is cookie 2 value",
	},
}

// Setting a cookies into resty
client.SetCookies(cookies)

func (*Client) SetDebug

func (c *Client) SetDebug(d bool) *Client

SetDebug method enables the debug mode on Resty client. Client logs details of every request and response. For `Request` it logs information such as HTTP verb, Relative URL path, Host, Headers, Body if it has one. For `Response` it logs information such as Status, Response Time, Headers, Body if it has one.

client.SetDebug(true)

func (*Client) SetDebugBodyLimit

func (c *Client) SetDebugBodyLimit(sl int64) *Client

SetDebugBodyLimit sets the maximum size for which the response and request body will be logged in debug mode.

client.SetDebugBodyLimit(1000000)

func (*Client) SetDisableWarn

func (c *Client) SetDisableWarn(d bool) *Client

SetDisableWarn method disables the warning message on Resty client.

For Example: Resty warns the user when BasicAuth used on non-TLS mode.

client.SetDisableWarn(true)

func (*Client) SetDoNotParseResponse

func (c *Client) SetDoNotParseResponse(parse bool) *Client

SetDoNotParseResponse method instructs `Resty` not to parse the response body automatically. Resty exposes the raw response body as `io.ReadCloser`. Also do not forget to close the body, otherwise you might get into connection leaks, no connection reuse.

Note: Response middlewares are not applicable, if you use this option. Basically you have taken over the control of response parsing from `Resty`.

func (*Client) SetError

func (c *Client) SetError(err interface{}) *Client

SetError method is to register the global or client common `Error` object into Resty. It is used for automatic unmarshalling if response status code is greater than 399 and content type either JSON or XML. Can be pointer or non-pointer.

client.SetError(&Error{})
// OR
client.SetError(Error{})

func (*Client) SetFormData

func (c *Client) SetFormData(data map[string]string) *Client

SetFormData method sets Form parameters and their values in the client instance. It's applicable only HTTP method `POST` and `PUT` and requets content type would be set as `application/x-www-form-urlencoded`. These form data will be added to all the request raised from this client instance. Also it can be overridden at request level form data.

See `Request.SetFormData`.

client.SetFormData(map[string]string{
		"access_token": "BC594900-518B-4F7E-AC75-BD37F019E08F",
		"user_id": "3455454545",
	})

func (*Client) SetHeader

func (c *Client) SetHeader(header, value string) *Client

SetHeader method sets a single header field and its value in the client instance. These headers will be applied to all requests raised from this client instance. Also it can be overridden at request level header options.

See `Request.SetHeader` or `Request.SetHeaders`.

For Example: To set `Content-Type` and `Accept` as `application/json`

client.
	SetHeader("Content-Type", "application/json").
	SetHeader("Accept", "application/json")

func (*Client) SetHeaderVerbatim

func (c *Client) SetHeaderVerbatim(header, value string) *Client

SetHeaderVerbatim method is to set a single header field and its value verbatim in the current request.

For Example: To set `all_lowercase` and `UPPERCASE` as `available`.

client.R().
	SetHeaderVerbatim("all_lowercase", "available").
	SetHeaderVerbatim("UPPERCASE", "available")

Also you can override header value, which was set at client instance level.

Since v2.6.0

func (*Client) SetHeaders

func (c *Client) SetHeaders(headers map[string]string) *Client

SetHeaders method sets multiple headers field and its values at one go in the client instance. These headers will be applied to all requests raised from this client instance. Also it can be overridden at request level headers options.

See `Request.SetHeaders` or `Request.SetHeader`.

For Example: To set `Content-Type` and `Accept` as `application/json`

client.SetHeaders(map[string]string{
		"Content-Type": "application/json",
		"Accept": "application/json",
	})

func (*Client) SetHostURL

func (c *Client) SetHostURL(url string) *Client

SetHostURL method is to set Host URL in the client instance. It will be used with request raised from this client with relative URL

// Setting HTTP address
client.SetHostURL("http://myjeeva.com")

// Setting HTTPS address
client.SetHostURL("https://myjeeva.com")

Deprecated: use SetBaseURL instead. To be removed in v3.0.0 release.

func (*Client) SetJSONEscapeHTML

func (c *Client) SetJSONEscapeHTML(b bool) *Client

SetJSONEscapeHTML method is to enable/disable the HTML escape on JSON marshal.

Note: This option only applicable to standard JSON Marshaller.

func (*Client) SetLogger

func (c *Client) SetLogger(l Logger) *Client

SetLogger method sets given writer for logging Resty request and response details.

Compliant to interface `resty.Logger`.

func (*Client) SetOutputDirectory

func (c *Client) SetOutputDirectory(dirPath string) *Client

SetOutputDirectory method sets output directory for saving HTTP response into file. If the output directory not exists then resty creates one. This setting is optional one, if you're planning using absolute path in `Request.SetOutput` and can used together.

client.SetOutputDirectory("/save/http/response/here")

func (*Client) SetPathParam

func (c *Client) SetPathParam(param, value string) *Client

SetPathParam method sets single URL path key-value pair in the Resty client instance.

client.SetPathParam("userId", "sample@sample.com")

Result:
   URL - /v1/users/{userId}/details
   Composed URL - /v1/users/sample@sample.com/details

It replaces the value of the key while composing the request URL.

Also it can be overridden at request level Path Params options, see `Request.SetPathParam` or `Request.SetPathParams`.

func (*Client) SetPathParams

func (c *Client) SetPathParams(params map[string]string) *Client

SetPathParams method sets multiple URL path key-value pairs at one go in the Resty client instance.

client.SetPathParams(map[string]string{
   "userId": "sample@sample.com",
   "subAccountId": "100002",
})

Result:
   URL - /v1/users/{userId}/{subAccountId}/details
   Composed URL - /v1/users/sample@sample.com/100002/details

It replaces the value of the key while composing the request URL.

Also it can be overridden at request level Path Params options, see `Request.SetPathParam` or `Request.SetPathParams`.

func (*Client) SetPreRequestHook

func (c *Client) SetPreRequestHook(h PreRequestHook) *Client

SetPreRequestHook method sets the given pre-request function into resty client. It is called right before the request is fired.

Note: Only one pre-request hook can be registered. Use `client.OnBeforeRequest` for mutilple.

func (*Client) SetProxy

func (c *Client) SetProxy(proxyURL string) *Client

SetProxy method sets the Proxy URL and Port for Resty client.

client.SetProxy("http://proxyserver:8888")

OR Without this `SetProxy` method, you could also set Proxy via environment variable.

Refer to godoc `http.ProxyFromEnvironment`.

func (*Client) SetQueryParam

func (c *Client) SetQueryParam(param, value string) *Client

SetQueryParam method sets single parameter and its value in the client instance. It will be formed as query string for the request.

For Example: `search=kitchen%20papers&size=large` in the URL after `?` mark. These query params will be added to all the request raised from this client instance. Also it can be overridden at request level Query Param options.

See `Request.SetQueryParam` or `Request.SetQueryParams`.

client.
	SetQueryParam("search", "kitchen papers").
	SetQueryParam("size", "large")

func (*Client) SetQueryParams

func (c *Client) SetQueryParams(params map[string]string) *Client

SetQueryParams method sets multiple parameters and their values at one go in the client instance. It will be formed as query string for the request.

For Example: `search=kitchen%20papers&size=large` in the URL after `?` mark. These query params will be added to all the request raised from this client instance. Also it can be overridden at request level Query Param options.

See `Request.SetQueryParams` or `Request.SetQueryParam`.

client.SetQueryParams(map[string]string{
		"search": "kitchen papers",
		"size": "large",
	})

func (*Client) SetRedirectPolicy

func (c *Client) SetRedirectPolicy(policies ...interface{}) *Client

SetRedirectPolicy method sets the client redirect poilicy. Resty provides ready to use redirect policies. Wanna create one for yourself refer to `redirect.go`.

client.SetRedirectPolicy(FlexibleRedirectPolicy(20))

// Need multiple redirect policies together
client.SetRedirectPolicy(FlexibleRedirectPolicy(20), DomainCheckRedirectPolicy("host1.com", "host2.net"))

func (*Client) SetRetryAfter

func (c *Client) SetRetryAfter(callback RetryAfterFunc) *Client

SetRetryAfter sets callback to calculate wait time between retries. Default (nil) implies exponential backoff with jitter

func (*Client) SetRetryCount

func (c *Client) SetRetryCount(count int) *Client

SetRetryCount method enables retry on Resty client and allows you to set no. of retry count. Resty uses a Backoff mechanism.

func (*Client) SetRetryMaxWaitTime

func (c *Client) SetRetryMaxWaitTime(maxWaitTime time.Duration) *Client

SetRetryMaxWaitTime method sets max wait time to sleep before retrying request.

Default is 2 seconds.

func (*Client) SetRetryWaitTime

func (c *Client) SetRetryWaitTime(waitTime time.Duration) *Client

SetRetryWaitTime method sets default wait time to sleep before retrying request.

Default is 100 milliseconds.

func (*Client) SetRootCertificate

func (c *Client) SetRootCertificate(pemFilePath string) *Client

SetRootCertificate method helps to add one or more root certificates into Resty client

client.SetRootCertificate("/path/to/root/pemFile.pem")

func (*Client) SetRootCertificateFromString

func (c *Client) SetRootCertificateFromString(pemContent string) *Client

SetRootCertificateFromString method helps to add one or more root certificates into Resty client

client.SetRootCertificateFromString("pem file content")

func (*Client) SetScheme

func (c *Client) SetScheme(scheme string) *Client

SetScheme method sets custom scheme in the Resty client. It's way to override default.

client.SetScheme("http")

func (*Client) SetTLSClientConfig

func (c *Client) SetTLSClientConfig(config *tls.Config) *Client

SetTLSClientConfig method sets TLSClientConfig for underling client Transport.

For Example:

// One can set custom root-certificate. Refer: http://golang.org/pkg/crypto/tls/#example_Dial
client.SetTLSClientConfig(&tls.Config{ RootCAs: roots })

// or One can disable security check (https)
client.SetTLSClientConfig(&tls.Config{ InsecureSkipVerify: true })

Note: This method overwrites existing `TLSClientConfig`.

func (*Client) SetTimeout

func (c *Client) SetTimeout(timeout time.Duration) *Client

SetTimeout method sets timeout for request raised from client.

client.SetTimeout(time.Duration(1 * time.Minute))

func (*Client) SetTransport

func (c *Client) SetTransport(transport http.RoundTripper) *Client

SetTransport method sets custom `*http.Transport` or any `http.RoundTripper` compatible interface implementation in the resty client.

Note:

- If transport is not type of `*http.Transport` then you may not be able to take advantage of some of the Resty client settings.

- It overwrites the Resty client transport instance and it's configurations.

transport := &http.Transport{
	// somthing like Proxying to httptest.Server, etc...
	Proxy: func(req *http.Request) (*url.URL, error) {
		return url.Parse(server.URL)
	},
}

client.SetTransport(transport)

type ErrorHook

type ErrorHook func(*Request, error)

ErrorHook type is for reacting to request errors, called after all retries were attempted

type File

type File struct {
	Name      string
	ParamName string
	io.Reader
}

File struct represent file information for multipart request

func (*File) String

func (f *File) String() string

String returns string value of current file details

type Logger

type Logger interface {
	Errorf(format string, v ...interface{})
	Warnf(format string, v ...interface{})
	Debugf(format string, v ...interface{})
}

Logger interface is to abstract the logging from Resty. Gives control to the Resty users, choice of the logger.

type MultipartField

type MultipartField struct {
	Param       string
	FileName    string
	ContentType string
	io.Reader
}

MultipartField struct represent custom data part for multipart request

type OnRetryFunc

type OnRetryFunc func(*Response, error)

OnRetryFunc is for side-effecting functions triggered on retry

type Option

type Option func(*Options)

Option is to create convenient retry options like wait time, max retries, etc.

func MaxWaitTime

func MaxWaitTime(value time.Duration) Option

MaxWaitTime sets the max wait time to sleep between requests

func Retries

func Retries(value int) Option

Retries sets the max number of retries

func RetryConditions

func RetryConditions(conditions []RetryConditionFunc) Option

RetryConditions sets the conditions that will be checked for retry.

func RetryHooks

func RetryHooks(hooks []OnRetryFunc) Option

RetryHooks sets the hooks that will be executed after each retry

func WaitTime

func WaitTime(value time.Duration) Option

WaitTime sets the default wait time to sleep between requests

type Options

type Options struct {
	// contains filtered or unexported fields
}

Options struct is used to hold retry settings.

type PreRequestHook

type PreRequestHook func(*Client, *http.Request) error

PreRequestHook type is for the request hook, called right before the request is sent

type RedirectPolicy

type RedirectPolicy interface {
	Apply(req *http.Request, via []*http.Request) error
}

RedirectPolicy to regulate the redirects in the resty client. Objects implementing the RedirectPolicy interface can be registered as

Apply function should return nil to continue the redirect jounery, otherwise return error to stop the redirect.

func DomainCheckRedirectPolicy

func DomainCheckRedirectPolicy(hostnames ...string) RedirectPolicy

DomainCheckRedirectPolicy is convenient method to define domain name redirect rule in resty client. Redirect is allowed for only mentioned host in the policy.

resty.SetRedirectPolicy(DomainCheckRedirectPolicy("host1.com", "host2.org", "host3.net"))

func FlexibleRedirectPolicy

func FlexibleRedirectPolicy(noOfRedirect int) RedirectPolicy

FlexibleRedirectPolicy is convenient method to create No of redirect policy for HTTP client.

resty.SetRedirectPolicy(FlexibleRedirectPolicy(20))

func NoRedirectPolicy

func NoRedirectPolicy() RedirectPolicy

NoRedirectPolicy is used to disable redirects in the HTTP client

resty.SetRedirectPolicy(NoRedirectPolicy())

type RedirectPolicyFunc

type RedirectPolicyFunc func(*http.Request, []*http.Request) error

The RedirectPolicyFunc type is an adapter to allow the use of ordinary functions as RedirectPolicy. If f is a function with the appropriate signature, RedirectPolicyFunc(f) is a RedirectPolicy object that calls f.

func (RedirectPolicyFunc) Apply

func (f RedirectPolicyFunc) Apply(req *http.Request, via []*http.Request) error

Apply calls f(req, via).

type Request

type Request struct {
	URL        string
	Method     string
	Token      string
	AuthScheme string
	QueryParam url.Values
	FormData   url.Values
	PathParams map[string]string
	Header     http.Header
	Time       time.Time
	Body       interface{}
	Result     interface{}
	Error      interface{}
	RawRequest *http.Request
	SRV        *SRVRecord
	UserInfo   *User
	Cookies    []*http.Cookie

	// Attempt is to represent the request attempt made during a Resty
	// request execution flow, including retry count.
	//
	// Since v2.4.0
	Attempt int
	// contains filtered or unexported fields
}

Request struct is used to compose and fire individual request from resty client. Request provides an options to override client level settings and also an options for the request composition.

func (*Request) AddRetryCondition

func (r *Request) AddRetryCondition(condition RetryConditionFunc) *Request

AddRetryCondition method adds a retry condition function to the request's array of functions that are checked to determine if the request is retried. The request will retry if any of the functions return true and error is nil.

Note: These retry conditions are checked before all retry conditions of the client.

Since v2.7.0

func (*Request) Context

func (r *Request) Context() context.Context

Context method returns the Context if its already set in request otherwise it creates new one using `context.Background()`.

func (*Request) Delete

func (r *Request) Delete(url string) (*Response, error)

Delete method does DELETE HTTP request. It's defined in section 4.3.5 of RFC7231.

func (*Request) EnableTrace

func (r *Request) EnableTrace() *Request

EnableTrace method enables trace for the current request using `httptrace.ClientTrace` and provides insights.

client := resty.New()

resp, err := client.R().EnableTrace().Get("https://httpbin.org/get")
fmt.Println("Error:", err)
fmt.Println("Trace Info:", resp.Request.TraceInfo())

See `Client.EnableTrace` available too to get trace info for all requests.

Since v2.0.0

func (*Request) Execute

func (r *Request) Execute(method, url string) (*Response, error)

Execute method performs the HTTP request with given HTTP method and URL for current `Request`.

resp, err := client.R().Execute(resty.GET, "http://httpbin.org/get")

func (*Request) ExpectContentType

func (r *Request) ExpectContentType(contentType string) *Request

ExpectContentType method allows to provide fallback `Content-Type` for automatic unmarshalling when `Content-Type` response header is unavailable.

func (*Request) ForceContentType

func (r *Request) ForceContentType(contentType string) *Request

ForceContentType method provides a strong sense of response `Content-Type` for automatic unmarshalling. Resty gives this a higher priority than the `Content-Type` response header. This means that if both `Request.ForceContentType` is set and the response `Content-Type` is available, `ForceContentType` will win.

func (*Request) Get

func (r *Request) Get(url string) (*Response, error)

Get method does GET HTTP request. It's defined in section 4.3.1 of RFC7231.

func (*Request) Head

func (r *Request) Head(url string) (*Response, error)

Head method does HEAD HTTP request. It's defined in section 4.3.2 of RFC7231.

func (*Request) Options

func (r *Request) Options(url string) (*Response, error)

Options method does OPTIONS HTTP request. It's defined in section 4.3.7 of RFC7231.

func (*Request) Patch

func (r *Request) Patch(url string) (*Response, error)

Patch method does PATCH HTTP request. It's defined in section 2 of RFC5789.

func (*Request) Post

func (r *Request) Post(url string) (*Response, error)

Post method does POST HTTP request. It's defined in section 4.3.3 of RFC7231.

func (*Request) Put

func (r *Request) Put(url string) (*Response, error)

Put method does PUT HTTP request. It's defined in section 4.3.4 of RFC7231.

func (*Request) Send

func (r *Request) Send() (*Response, error)

Send method performs the HTTP request using the method and URL already defined for current `Request`.

     req := client.R()
     req.Method = resty.GET
     req.URL = "http://httpbin.org/get"
		resp, err := client.R().Send()

func (*Request) SetAuthScheme

func (r *Request) SetAuthScheme(scheme string) *Request

SetAuthScheme method sets the auth token scheme type in the HTTP request. For Example:

Authorization: <auth-scheme-value-set-here> <auth-token-value>

For Example: To set the scheme to use OAuth

client.R().SetAuthScheme("OAuth")

This auth header scheme gets added to all the request rasied from this client instance. Also it can be overridden or set one at the request level is supported.

Information about Auth schemes can be found in RFC7235 which is linked to below along with the page containing the currently defined official authentication schemes:

https://tools.ietf.org/html/rfc7235
https://www.iana.org/assignments/http-authschemes/http-authschemes.xhtml#authschemes

This method overrides the Authorization scheme set by method `Client.SetAuthScheme`.

func (*Request) SetAuthToken

func (r *Request) SetAuthToken(token string) *Request

SetAuthToken method sets the auth token header(Default Scheme: Bearer) in the current HTTP request. Header example:

Authorization: Bearer <auth-token-value-comes-here>

For Example: To set auth token BC594900518B4F7EAC75BD37F019E08FBC594900518B4F7EAC75BD37F019E08F

client.R().SetAuthToken("BC594900518B4F7EAC75BD37F019E08FBC594900518B4F7EAC75BD37F019E08F")

This method overrides the Auth token set by method `Client.SetAuthToken`.

func (*Request) SetBasicAuth

func (r *Request) SetBasicAuth(username, password string) *Request

SetBasicAuth method sets the basic authentication header in the current HTTP request.

For Example:

Authorization: Basic <base64-encoded-value>

To set the header for username "go-resty" and password "welcome"

client.R().SetBasicAuth("go-resty", "welcome")

This method overrides the credentials set by method `Client.SetBasicAuth`.

func (*Request) SetBody

func (r *Request) SetBody(body interface{}) *Request

SetBody method sets the request body for the request. It supports various realtime needs as easy. We can say its quite handy or powerful. Supported request body data types is `string`, `[]byte`, `struct`, `map`, `slice` and `io.Reader`. Body value can be pointer or non-pointer. Automatic marshalling for JSON and XML content type, if it is `struct`, `map`, or `slice`.

Note: `io.Reader` is processed as bufferless mode while sending request.

For Example: Struct as a body input, based on content type, it will be marshalled.

client.R().
	SetBody(User{
		Username: "jeeva@myjeeva.com",
		Password: "welcome2resty",
	})

Map as a body input, based on content type, it will be marshalled.

client.R().
	SetBody(map[string]interface{}{
		"username": "jeeva@myjeeva.com",
		"password": "welcome2resty",
		"address": &Address{
			Address1: "1111 This is my street",
			Address2: "Apt 201",
			City: "My City",
			State: "My State",
			ZipCode: 00000,
		},
	})

String as a body input. Suitable for any need as a string input.

client.R().
	SetBody(`{
		"username": "jeeva@getrightcare.com",
		"password": "admin"
	}`)

[]byte as a body input. Suitable for raw request such as file upload, serialize & deserialize, etc.

client.R().
	SetBody([]byte("This is my raw request, sent as-is"))

func (*Request) SetContentLength

func (r *Request) SetContentLength(l bool) *Request

SetContentLength method sets the HTTP header `Content-Length` value for current request. By default Resty won't set `Content-Length`. Also you have an option to enable for every request.

See `Client.SetContentLength`

client.R().SetContentLength(true)

func (*Request) SetContext

func (r *Request) SetContext(ctx context.Context) *Request

SetContext method sets the context.Context for current Request. It allows to interrupt the request execution if ctx.Done() channel is closed. See https://blog.golang.org/context article and the "context" package documentation.

func (*Request) SetCookie

func (r *Request) SetCookie(hc *http.Cookie) *Request

SetCookie method appends a single cookie in the current request instance.

client.R().SetCookie(&http.Cookie{
			Name:"go-resty",
			Value:"This is cookie value",
		})

Note: Method appends the Cookie value into existing Cookie if already existing.

Since v2.1.0

func (*Request) SetCookies

func (r *Request) SetCookies(rs []*http.Cookie) *Request

SetCookies method sets an array of cookies in the current request instance.

cookies := []*http.Cookie{
	&http.Cookie{
		Name:"go-resty-1",
		Value:"This is cookie 1 value",
	},
	&http.Cookie{
		Name:"go-resty-2",
		Value:"This is cookie 2 value",
	},
}

// Setting a cookies into resty's current request
client.R().SetCookies(cookies)

Note: Method appends the Cookie value into existing Cookie if already existing.

Since v2.1.0

func (*Request) SetDoNotParseResponse

func (r *Request) SetDoNotParseResponse(parse bool) *Request

SetDoNotParseResponse method instructs `Resty` not to parse the response body automatically. Resty exposes the raw response body as `io.ReadCloser`. Also do not forget to close the body, otherwise you might get into connection leaks, no connection reuse.

Note: Response middlewares are not applicable, if you use this option. Basically you have taken over the control of response parsing from `Resty`.

func (*Request) SetError

func (r *Request) SetError(err interface{}) *Request

SetError method is to register the request `Error` object for automatic unmarshalling for the request, if response status code is greater than 399 and content type either JSON or XML.

Note: Error object can be pointer or non-pointer.

client.R().SetError(&AuthError{})
// OR
client.R().SetError(AuthError{})

Accessing a error value from response instance.

response.Error().(*AuthError)

func (*Request) SetFile

func (r *Request) SetFile(param, filePath string) *Request

SetFile method is to set single file field name and its path for multipart upload.

client.R().
	SetFile("my_file", "/Users/jeeva/Gas Bill - Sep.pdf")

func (*Request) SetFileReader

func (r *Request) SetFileReader(param, fileName string, reader io.Reader) *Request

SetFileReader method is to set single file using io.Reader for multipart upload.

client.R().
	SetFileReader("profile_img", "my-profile-img.png", bytes.NewReader(profileImgBytes)).
	SetFileReader("notes", "user-notes.txt", bytes.NewReader(notesBytes))

func (*Request) SetFiles

func (r *Request) SetFiles(files map[string]string) *Request

SetFiles method is to set multiple file field name and its path for multipart upload.

client.R().
	SetFiles(map[string]string{
			"my_file1": "/Users/jeeva/Gas Bill - Sep.pdf",
			"my_file2": "/Users/jeeva/Electricity Bill - Sep.pdf",
			"my_file3": "/Users/jeeva/Water Bill - Sep.pdf",
		})

func (*Request) SetFormData

func (r *Request) SetFormData(data map[string]string) *Request

SetFormData method sets Form parameters and their values in the current request. It's applicable only HTTP method `POST` and `PUT` and requests content type would be set as `application/x-www-form-urlencoded`.

client.R().
	SetFormData(map[string]string{
		"access_token": "BC594900-518B-4F7E-AC75-BD37F019E08F",
		"user_id": "3455454545",
	})

Also you can override form data value, which was set at client instance level.

func (*Request) SetFormDataFromValues

func (r *Request) SetFormDataFromValues(data url.Values) *Request

SetFormDataFromValues method appends multiple form parameters with multi-value (`url.Values`) at one go in the current request.

client.R().
	SetFormDataFromValues(url.Values{
		"search_criteria": []string{"book", "glass", "pencil"},
	})

Also you can override form data value, which was set at client instance level.

func (*Request) SetHeader

func (r *Request) SetHeader(header, value string) *Request

SetHeader method is to set a single header field and its value in the current request.

For Example: To set `Content-Type` and `Accept` as `application/json`.

client.R().
	SetHeader("Content-Type", "application/json").
	SetHeader("Accept", "application/json")

Also you can override header value, which was set at client instance level.

func (*Request) SetHeaderMultiValues

func (r *Request) SetHeaderMultiValues(headers map[string][]string) *Request

SetHeaderMultiValues sets multiple headers fields and its values is list of strings at one go in the current request.

For Example: To set `Accept` as `text/html, application/xhtml+xml, application/xml;q=0.9, image/webp, */*;q=0.8`

client.R().
	SetHeaderMultiValues(map[string][]string{
		"Accept": []string{"text/html", "application/xhtml+xml", "application/xml;q=0.9", "image/webp", "*/*;q=0.8"},
	})

Also you can override header value, which was set at client instance level.

func (*Request) SetHeaderVerbatim

func (r *Request) SetHeaderVerbatim(header, value string) *Request

SetHeaderVerbatim method is to set a single header field and its value verbatim in the current request.

For Example: To set `all_lowercase` and `UPPERCASE` as `available`.

client.R().
	SetHeaderVerbatim("all_lowercase", "available").
	SetHeaderVerbatim("UPPERCASE", "available")

Also you can override header value, which was set at client instance level.

Since v2.6.0

func (*Request) SetHeaders

func (r *Request) SetHeaders(headers map[string]string) *Request

SetHeaders method sets multiple headers field and its values at one go in the current request.

For Example: To set `Content-Type` and `Accept` as `application/json`

client.R().
	SetHeaders(map[string]string{
		"Content-Type": "application/json",
		"Accept": "application/json",
	})

Also you can override header value, which was set at client instance level.

func (*Request) SetJSONEscapeHTML

func (r *Request) SetJSONEscapeHTML(b bool) *Request

SetJSONEscapeHTML method is to enable/disable the HTML escape on JSON marshal.

Note: This option only applicable to standard JSON Marshaller.

func (*Request) SetMultipartField

func (r *Request) SetMultipartField(param, fileName, contentType string, reader io.Reader) *Request

SetMultipartField method is to set custom data using io.Reader for multipart upload.

func (*Request) SetMultipartFields

func (r *Request) SetMultipartFields(fields ...*MultipartField) *Request

SetMultipartFields method is to set multiple data fields using io.Reader for multipart upload.

For Example:

client.R().SetMultipartFields(
	&resty.MultipartField{
		Param:       "uploadManifest1",
		FileName:    "upload-file-1.json",
		ContentType: "application/json",
		Reader:      strings.NewReader(`{"input": {"name": "Uploaded document 1", "_filename" : ["file1.txt"]}}`),
	},
	&resty.MultipartField{
		Param:       "uploadManifest2",
		FileName:    "upload-file-2.json",
		ContentType: "application/json",
		Reader:      strings.NewReader(`{"input": {"name": "Uploaded document 2", "_filename" : ["file2.txt"]}}`),
	})

If you have slice already, then simply call-

client.R().SetMultipartFields(fields...)

func (*Request) SetMultipartFormData

func (r *Request) SetMultipartFormData(data map[string]string) *Request

SetMultipartFormData method allows simple form data to be attached to the request as `multipart:form-data`

func (*Request) SetOutput

func (r *Request) SetOutput(file string) *Request

SetOutput method sets the output file for current HTTP request. Current HTTP response will be saved into given file. It is similar to `curl -o` flag. Absolute path or relative path can be used. If is it relative path then output file goes under the output directory, as mentioned in the `Client.SetOutputDirectory`.

client.R().
	SetOutput("/Users/jeeva/Downloads/ReplyWithHeader-v5.1-beta.zip").
	Get("http://bit.ly/1LouEKr")

Note: In this scenario `Response.Body` might be nil.

func (*Request) SetPathParam

func (r *Request) SetPathParam(param, value string) *Request

SetPathParam method sets single URL path key-value pair in the Resty current request instance.

client.R().SetPathParam("userId", "sample@sample.com")

Result:
   URL - /v1/users/{userId}/details
   Composed URL - /v1/users/sample@sample.com/details

It replaces the value of the key while composing the request URL. Also you can override Path Params value, which was set at client instance level.

func (*Request) SetPathParams

func (r *Request) SetPathParams(params map[string]string) *Request

SetPathParams method sets multiple URL path key-value pairs at one go in the Resty current request instance.

client.R().SetPathParams(map[string]string{
   "userId": "sample@sample.com",
   "subAccountId": "100002",
})

Result:
   URL - /v1/users/{userId}/{subAccountId}/details
   Composed URL - /v1/users/sample@sample.com/100002/details

It replaces the value of the key while composing request URL. Also you can override Path Params value, which was set at client instance level.

func (*Request) SetQueryParam

func (r *Request) SetQueryParam(param, value string) *Request

SetQueryParam method sets single parameter and its value in the current request. It will be formed as query string for the request.

For Example: `search=kitchen%20papers&size=large` in the URL after `?` mark.

client.R().
	SetQueryParam("search", "kitchen papers").
	SetQueryParam("size", "large")

Also you can override query params value, which was set at client instance level.

func (*Request) SetQueryParams

func (r *Request) SetQueryParams(params map[string]string) *Request

SetQueryParams method sets multiple parameters and its values at one go in the current request. It will be formed as query string for the request.

For Example: `search=kitchen%20papers&size=large` in the URL after `?` mark.

client.R().
	SetQueryParams(map[string]string{
		"search": "kitchen papers",
		"size": "large",
	})

Also you can override query params value, which was set at client instance level.

func (*Request) SetQueryParamsFromValues

func (r *Request) SetQueryParamsFromValues(params url.Values) *Request

SetQueryParamsFromValues method appends multiple parameters with multi-value (`url.Values`) at one go in the current request. It will be formed as query string for the request.

For Example: `status=pending&status=approved&status=open` in the URL after `?` mark.

client.R().
	SetQueryParamsFromValues(url.Values{
		"status": []string{"pending", "approved", "open"},
	})

Also you can override query params value, which was set at client instance level.

func (*Request) SetQueryString

func (r *Request) SetQueryString(query string) *Request

SetQueryString method provides ability to use string as an input to set URL query string for the request.

Using String as an input

client.R().
	SetQueryString("productId=232&template=fresh-sample&cat=resty&source=google&kw=buy a lot more")

func (*Request) SetResult

func (r *Request) SetResult(res interface{}) *Request

SetResult method is to register the response `Result` object for automatic unmarshalling for the request, if response status code is between 200 and 299 and content type either JSON or XML.

Note: Result object can be pointer or non-pointer.

client.R().SetResult(&AuthToken{})
// OR
client.R().SetResult(AuthToken{})

Accessing a result value from response instance.

response.Result().(*AuthToken)

func (*Request) SetSRV

func (r *Request) SetSRV(srv *SRVRecord) *Request

SetSRV method sets the details to query the service SRV record and execute the request.

client.R().
	SetSRV(SRVRecord{"web", "testservice.com"}).
	Get("/get")

func (*Request) TraceInfo

func (r *Request) TraceInfo() TraceInfo

TraceInfo method returns the trace info for the request. If either the Client or Request EnableTrace function has not been called prior to the request being made, an empty TraceInfo object will be returned.

Since v2.0.0

type RequestLog

type RequestLog struct {
	Header http.Header
	Body   string
}

RequestLog struct is used to collected information from resty request instance for debug logging. It sent to request log callback before resty actually logs the information.

type RequestLogCallback

type RequestLogCallback func(*RequestLog) error

RequestLogCallback type is for request logs, called before the request is logged

type RequestMiddleware

type RequestMiddleware func(*Client, *Request) error

RequestMiddleware type is for request middleware, called before a request is sent

type Response

type Response struct {
	Request     *Request
	RawResponse *http.Response
	// contains filtered or unexported fields
}

Response struct holds response values of executed request.

func (*Response) Body

func (r *Response) Body() []byte

Body method returns HTTP response as []byte array for the executed request.

Note: `Response.Body` might be nil, if `Request.SetOutput` is used.

func (*Response) Cookies

func (r *Response) Cookies() []*http.Cookie

Cookies method to access all the response cookies

func (*Response) Error

func (r *Response) Error() interface{}

Error method returns the error object if it has one

func (*Response) Header

func (r *Response) Header() http.Header

Header method returns the response headers

func (*Response) IsError

func (r *Response) IsError() bool

IsError method returns true if HTTP status `code >= 400` otherwise false.

func (*Response) IsSuccess

func (r *Response) IsSuccess() bool

IsSuccess method returns true if HTTP status `code >= 200 and <= 299` otherwise false.

func (*Response) Proto

func (r *Response) Proto() string

Proto method returns the HTTP response protocol used for the request.

func (*Response) RawBody

func (r *Response) RawBody() io.ReadCloser

RawBody method exposes the HTTP raw response body. Use this method in-conjunction with `SetDoNotParseResponse` option otherwise you get an error as `read err: http: read on closed response body`.

Do not forget to close the body, otherwise you might get into connection leaks, no connection reuse. Basically you have taken over the control of response parsing from `Resty`.

func (*Response) ReceivedAt

func (r *Response) ReceivedAt() time.Time

ReceivedAt method returns when response got received from server for the request.

func (*Response) Result

func (r *Response) Result() interface{}

Result method returns the response value as an object if it has one

func (*Response) Size

func (r *Response) Size() int64

Size method returns the HTTP response size in bytes. Ya, you can relay on HTTP `Content-Length` header, however it won't be good for chucked transfer/compressed response. Since Resty calculates response size at the client end. You will get actual size of the http response.

func (*Response) Status

func (r *Response) Status() string

Status method returns the HTTP status string for the executed request.

Example: 200 OK

func (*Response) StatusCode

func (r *Response) StatusCode() int

StatusCode method returns the HTTP status code for the executed request.

Example: 200

func (*Response) String

func (r *Response) String() string

String method returns the body of the server response as String.

func (*Response) Time

func (r *Response) Time() time.Duration

Time method returns the time of HTTP response time that from request we sent and received a request.

See `Response.ReceivedAt` to know when client received response and see `Response.Request.Time` to know when client sent a request.

type ResponseError

type ResponseError struct {
	Response *Response
	Err      error
}

ResponseError is a wrapper for including the server response with an error. Neither the err nor the response should be nil.

func (*ResponseError) Error

func (e *ResponseError) Error() string

func (*ResponseError) Unwrap

func (e *ResponseError) Unwrap() error

type ResponseLog

type ResponseLog struct {
	Header http.Header
	Body   string
}

ResponseLog struct is used to collected information from resty response instance for debug logging. It sent to response log callback before resty actually logs the information.

type ResponseLogCallback

type ResponseLogCallback func(*ResponseLog) error

ResponseLogCallback type is for response logs, called before the response is logged

type ResponseMiddleware

type ResponseMiddleware func(*Client, *Response) error

ResponseMiddleware type is for response middleware, called after a response has been received

type RetryAfterFunc

type RetryAfterFunc func(*Client, *Response) (time.Duration, error)

RetryAfterFunc returns time to wait before retry For example, it can parse HTTP Retry-After header https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html Non-nil error is returned if it is found that request is not retryable (0, nil) is a special result means 'use default algorithm'

type RetryConditionFunc

type RetryConditionFunc func(*Response, error) bool

RetryConditionFunc type is for retry condition function input: non-nil Response OR request execution error

type SRVRecord

type SRVRecord struct {
	Service string
	Domain  string
}

SRVRecord struct holds the data to query the SRV record for the following service.

type TraceInfo

type TraceInfo struct {
	// DNSLookup is a duration that transport took to perform
	// DNS lookup.
	DNSLookup time.Duration

	// ConnTime is a duration that took to obtain a successful connection.
	ConnTime time.Duration

	// TCPConnTime is a duration that took to obtain the TCP connection.
	TCPConnTime time.Duration

	// TLSHandshake is a duration that TLS handshake took place.
	TLSHandshake time.Duration

	// ServerTime is a duration that server took to respond first byte.
	ServerTime time.Duration

	// ResponseTime is a duration since first response byte from server to
	// request completion.
	ResponseTime time.Duration

	// TotalTime is a duration that total request took end-to-end.
	TotalTime time.Duration

	// IsConnReused is whether this connection has been previously
	// used for another HTTP request.
	IsConnReused bool

	// IsConnWasIdle is whether this connection was obtained from an
	// idle pool.
	IsConnWasIdle bool

	// ConnIdleTime is a duration how long the connection was previously
	// idle, if IsConnWasIdle is true.
	ConnIdleTime time.Duration

	// RequestAttempt is to represent the request attempt made during a Resty
	// request execution flow, including retry count.
	RequestAttempt int

	// RemoteAddr returns the remote network address.
	RemoteAddr net.Addr
}

TraceInfo struct is used provide request trace info such as DNS lookup duration, Connection obtain duration, Server processing duration, etc.

Since v2.0.0

type User

type User struct {
	Username, Password string
}

User type is to hold an username and password information