client

Documentation

Overview

Package client provides HTTP client implementation. The client provided in here is opinionated and comes with good defaults.

Index

• type Client
  • func SafeClient(l log.Logger) *Client
  • func UnsafeClient(l log.Logger) *Client
  • func (c *Client) CloseIdleConnections()
  • func (c *Client) Do(ctx context.Context, req *http.Request) (resp *http.Response, err error)
  • func (c *Client) Get(ctx context.Context, url string) (resp *http.Response, err error)
  • func (c *Client) Head(ctx context.Context, url string) (resp *http.Response, err error)
  • func (c *Client) Post(ctx context.Context, url, contentType string, body io.Reader) (resp *http.Response, err error)
  • func (c *Client) PostForm(ctx context.Context, url string, data url.Values) (resp *http.Response, err error)

Examples

• Client.Get

Types

type Client

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

Client is a http.Client that has some good defaults. It also logs requests and responses using log.Logger

Use either SafeClient or UnsafeClient to get a valid client.

Clients should be reused instead of created as needed. Clients are safe for concurrent use by multiple goroutines.

see http.Client

func SafeClient

func SafeClient(l log.Logger) *Client

SafeClient creates a client that is safe from Server-side request forgery (SSRF) security vulnerability.

func UnsafeClient

func UnsafeClient(l log.Logger) *Client

UnsafeClient creates a client that is NOT safe from Server-side request forgery (SSRF) security vulnerability.

func (*Client) CloseIdleConnections

func (c *Client) CloseIdleConnections()

CloseIdleConnections closes any connections on its Transport which were previously connected from previous requests but are now sitting idle in a "keep-alive" state.

It does not interrupt any connections currently in use.

see http.Client.CloseIdleConnections

func (*Client) Do

func (c *Client) Do(ctx context.Context, req *http.Request) (resp *http.Response, err error)

Do sends an HTTP request and returns an HTTP response, following policy (such as redirects, cookies, auth) as configured on the client.

see http.Client.Do

func (*Client) Get

func (c *Client) Get(ctx context.Context, url string) (resp *http.Response, err error)

Get issues a GET to the specified URL.

see http.Client.Get

Example

package main

import (
	"context"
	"os"

	"github.com/komuw/ong/client"
	"github.com/komuw/ong/log"
)

func main() {
	ctx := context.Background()
	l := log.New(ctx, os.Stdout, 7)

	cli := client.SafeClient(l)
	_, _ = cli.Get(ctx, "https://ajmsmsYnns-bad-domain.com")

	// This will log:
	// {"level":"info","logID":"D2MH3e3BqZmRgm3WK8yK7Q","method":"GET","msg":"http_client","pid":2102616,"process":"request","timestamp":"2022-09-16T09:39:55.423743309Z","url":"https://ajmsmsYnns-bad-domain.com"}
	// {"durationMS":339,"err":"Get \"https://ajmsmsYnns-bad-domain.com\": dial tcp: lookup ajmsmsYnns-bad-domain.com on 127.0.0.53:53: no such host","level":"error","logID":"D2MH3e3BqZmRgm3WK8yK7Q","method":"GET","msg":"http_client","pid":2102616,"process":"response","timestamp":"2022-09-16T09:39:55.762989726Z","url":"https://ajmsmsYnns-bad-domain.com"}
}

func (*Client) Head

func (c *Client) Head(ctx context.Context, url string) (resp *http.Response, err error)

Head issues a HEAD to the specified URL.

see http.Client.Head

func (*Client) Post

func (c *Client) Post(ctx context.Context, url, contentType string, body io.Reader) (resp *http.Response, err error)

Post issues a POST to the specified URL.

see http.Client.Post

func (*Client) PostForm

func (c *Client) PostForm(ctx context.Context, url string, data url.Values) (resp *http.Response, err error)

PostForm issues a POST to the specified URL, with data's keys and values URL-encoded as the request body.

see http.Client.PostForm