httpclient

README

go-httpclient

Advanced HTTP client for golang.

Features

• Simple API
• Direct file upload
• Timeout
• Proxy(HTTP, SOCKS5, SOCKS4, SOCKS4A)
• Redirect Policy

Why

There is already a built in http module for golang, and it's possible to achieve any tasks with it. But I found it painful to do some simple tasks. For example, set timeout, set proxy, upload files etc.

I used to be using CURL, and have built a PHP library on top of it. It turned out solving my problems. So I decided to built one for golang.

Installation

go get github.com/ddliu/go-httpclient

Usage

In most cases you just need the Get and Post method:

func (this *HttpClient) Get(url string, params map[string]string, headers map[string]string, options map[int]interface{}) (*http.Response, error)
func (this *HttpClient) Post(url string, params map[string]string, headers map[string]string, isMultipart bool, options map[int]interface{}) (*http.Response, error)

package main

import (
    "github.com/ddliu/go-httpclient"
    "fmt"
)

func main() {
    c := httpclient.NewHttpClient(nil)
    res, err := c.Get("http://google.com/search", map[string]string{
        "q": "news",
    }, nil, nil)

    fmt.Println(res.StatusCode, err)

    res, err := c.Post("http://dropbox.com/upload", map[string]string {
        "@file": "/tmp/hello.pdf",
    }, nil, true, map[int]interface{} {
        httpclient.TIMEOUT: 60,
    })

    fmt.Println(res, err)
}

Options

You can specify default options for the httpclient instance, and then override it by passing new options for each request.

Available options as below:

• OPT_FOLLOWLOCATION: TRUE to follow any "Location: " header that the server sends as part of the HTTP header
• OPT_CONNECTTIMEOUT: The number of seconds to wait while trying to connect. Use 0 to wait indefinitely.
• OPT_CONNECTTIMEOUT_MS: The number of milliseconds to wait while trying to connect. Use 0 to wait indefinitely.
• OPT_MAXREDIRS: The maximum amount of HTTP redirections to follow. Use this option alongside OPT_FOLLOWLOCATION.
• OPT_PROXYTYPE: Specify the proxy type. Valid options are PROXY_HTTP, PROXY_SOCKS4, PROXY_SOCKS5, PROXY_SOCKS4A. Only PROXY_HTTP is supported currently.
• OPT_TIMEOUT: The maximum number of seconds to allow httpclient functions to execute.
• OPT_TIMEOUT_MS: The maximum number of milliseconds to allow httpclient functions to execute.
• OPT_COOKIEJAR: TODO
• OPT_INTERFACE: TODO
• OPT_PROXY: Proxy host and port(127.0.0.1:1080).
• OPT_REFERER: The Referer header of the request.
• OPT_USERAGENT: The User-Agent header of the request.
• OPT_REDIRECT_POLICY: Function to check redirect.
• OPT_PROXY_FUNC: Function to specify proxy.

TODO

• Socks proxy support
• COOKIE
• API improvement

Changelog

v0.1.0 (2014-02-14)

Initial release

Documentation

Index

• Constants
• Variables
• func Option(o map[string]interface{}) map[int]interface{}
• type HttpClient
  • func NewHttpClient(options map[int]interface{}) *HttpClient
  • func (this *HttpClient) Get(url string, params map[string]string, headers map[string]string, ...) (*http.Response, error)
  • func (this *HttpClient) Post(url string, params map[string]string, headers map[string]string, ...) (*http.Response, error)
  • func (this *HttpClient) Request(method string, url_ string, headers map[string]string, body io.Reader, ...) (*http.Response, error)

Constants

const (
	VERSION   = "0.1.0"
	USERAGENT = "go-httpclient v" + VERSION

	PROXY_HTTP    = 0
	PROXY_SOCKS4  = 4
	PROXY_SOCKS5  = 5
	PROXY_SOCKS4A = 6

	// CURL like OPT
	OPT_AUTOREFERER       = 58
	OPT_FOLLOWLOCATION    = 52
	OPT_CONNECTTIMEOUT    = 78
	OPT_CONNECTTIMEOUT_MS = 156
	OPT_MAXREDIRS         = 68
	OPT_PROXYTYPE         = 101
	OPT_TIMEOUT           = 13
	OPT_TIMEOUT_MS        = 155
	OPT_COOKIEJAR         = 10082
	OPT_INTERFACE         = 10062
	OPT_PROXY             = 10004
	OPT_REFERER           = 10016
	OPT_USERAGENT         = 10018

	// Other OPT
	OPT_REDIRECT_POLICY = 100000
	OPT_PROXY_FUNC      = 100001
)

https://github.com/bagder/curl/blob/169fedbdce93ecf14befb6e0e1ce6a2d480252a3/packages/OS400/curl.inc.in

Variables

var CONST = map[string]int{
	"OPT_AUTOREFERER":       58,
	"OPT_FOLLOWLOCATION":    52,
	"OPT_CONNECTTIMEOUT":    78,
	"OPT_CONNECTTIMEOUT_MS": 156,
	"OPT_MAXREDIRS":         68,
	"OPT_PROXYTYPE":         101,
	"OPT_TIMEOUT":           13,
	"OPT_TIMEOUT_MS":        155,
	"OPT_COOKIEJAR":         10082,
	"OPT_INTERFACE":         10062,
	"OPT_PROXY":             10004,
	"OPT_REFERER":           10016,
	"OPT_USERAGENT":         10018,

	"OPT_REDIRECT_POLICY": 100000,
	"OPT_PROXY_FUNC":      100001,
}

Functions

func Option

func Option(o map[string]interface{}) map[int]interface{}

Convert options with strin keys to desired format

Types

type HttpClient

type HttpClient struct {
	Options map[int]interface{}
}

func NewHttpClient

func NewHttpClient(options map[int]interface{}) *HttpClient

func (*HttpClient) Get

func (this *HttpClient) Get(url string, params map[string]string, headers map[string]string, options map[int]interface{}) (*http.Response, error)

The GET request

func (*HttpClient) Post

func (this *HttpClient) Post(url string, params map[string]string, headers map[string]string, isMultipart bool, options map[int]interface{}) (*http.Response, error)

The POST request

With multipart set to true, the request will be encoded as "multipart/form-data". If any of the params key starts with "@", it is considered as a form file (similar to CURL but different).

func (*HttpClient) Request

func (this *HttpClient) Request(method string, url_ string, headers map[string]string, body io.Reader, options map[int]interface{}) (*http.Response, error)

Start a HTTP request, and returns the response