README ¶
graphql
Low-level GraphQL client for Go.
- Simple, familiar API
- Respects
context.Context
timeouts and cancellation - Build and execute any kind of GraphQL request
- Use strong Go types for response data
- Use variables and upload files
- Simple error handling
Installation
Make sure you have a working Go environment. To install graphql, simply run:
$ go get github.com/machinebox/graphql
Usage
import "context"
// create a client (safe to share across requests)
client := graphql.NewClient("https://machinebox.io/graphql")
// make a request
req := graphql.NewRequest(`
query ($key: String!) {
items (id:$key) {
field1
field2
field3
}
}
`)
// set any variables
req.Var("key", "value")
// set header fields
req.Header.Set("Cache-Control", "no-cache")
// define a Context for the request
ctx := context.Background()
// run it and capture the response
var respData ResponseStruct
if err := client.Run(ctx, req, &respData); err != nil {
log.Fatal(err)
}
File support via multipart form data
By default, the package will send a JSON body. To enable the sending of files, you can opt to
use multipart form data instead using the UseMultipartForm
option when you create your Client
:
client := graphql.NewClient("https://machinebox.io/graphql", graphql.UseMultipartForm())
For more information, read the godoc package documentation or the blog post.
Thanks
Thanks to Chris Broadfoot for design help.
Documentation ¶
Overview ¶
Package graphql provides a low level GraphQL client.
// create a client (safe to share across requests) client := graphql.NewClient("https://machinebox.io/graphql") // make a request req := graphql.NewRequest(` query ($key: String!) { items (id:$key) { field1 field2 field3 } } `) // set any variables req.Var("key", "value") // run it and capture the response var respData ResponseStruct if err := client.Run(ctx, req, &respData); err != nil { log.Fatal(err) }
Specify client ¶
To specify your own http.Client, use the WithHTTPClient option:
httpclient := &http.Client{} client := graphql.NewClient("https://machinebox.io/graphql", graphql.WithHTTPClient(httpclient))
Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type Client ¶
type Client struct { // Log is called with various debug information. // To log to standard out, use: // client.Log = func(s string) { log.Println(s) } Log func(s string) // contains filtered or unexported fields }
Client is a client for interacting with a GraphQL API.
func NewClient ¶
func NewClient(endpoint string, opts ...ClientOption) *Client
NewClient makes a new Client capable of making GraphQL requests.
type ClientOption ¶
type ClientOption func(*Client)
ClientOption are functions that are passed into NewClient to modify the behaviour of the Client.
func ImmediatelyCloseReqBody ¶
func ImmediatelyCloseReqBody() ClientOption
ImmediatelyCloseReqBody will close the req body immediately after each request body is ready
func UseMultipartForm ¶
func UseMultipartForm() ClientOption
UseMultipartForm uses multipart/form-data and activates support for files.
func WithHTTPClient ¶
func WithHTTPClient(httpclient *http.Client) ClientOption
WithHTTPClient specifies the underlying http.Client to use when making requests.
NewClient(endpoint, WithHTTPClient(specificHTTPClient))
type ExtendedError ¶
type Request ¶
type Request struct { // Header represent any request headers that will be set // when the request is made. Header http.Header // contains filtered or unexported fields }
Request is a GraphQL request.
func NewRequest ¶
NewRequest makes a new Request with the specified string.
func (*Request) File ¶
File sets a file to upload. Files are only supported with a Client that was created with the UseMultipartForm option.