Greq

中文说明 | English

greq A simple http client request builder and sender

Features

• Make http requests, supports GET,POST,PUT,PATCH,DELETE,HEAD
• Transform request and response data
• Supports chain configuration request
• Supports defining and adding middleware
• Supports defining request body provider and response decoder
• Built-In: fom, json request body provider
• Built-In: xml, json response body decoder

Install

go get github.com/gookit/greq

Quick start

package main

import (
	"github.com/gookit/goutil/dump"
	"github.com/gookit/greq"
)

func main() {
	resp, err := greq.New("https://httpbin.org").
		JSONType().
		UserAgent("custom-client/1.0").
		PostDo("/post", `{"name": "inhere"}`)

	if err != nil {
		panic(err)
	}

	ret := make(map[string]any)
	err = resp.Decode(&ret)
	if err != nil {
		panic(err)
	}

	dump.P(ret)
}

Result:

PRINT AT github.com/gookit/greq_test.TestHReq_Send(greq_test.go:73)
map[string]interface {} { #len=4
  "args": map[string]interface {} { #len=0
  },
  "headers": map[string]interface {} { #len=4
    "Host": string("httpbin.org"), #len=11
    "User-Agent": string("custom-client/1.0"), #len=17
    "X-Amzn-Trace-Id": string("Root=1-61e4d41e-06e27ae12ff872a224373ca7"), #len=40
    "Accept-Encoding": string("gzip"), #len=4
  },
  "origin": string("222.210.59.218"), #len=14
  "url": string("https://httpbin.org/post"), #len=24
},

Request headers

greq.New("some.host/api").
	SetHeader("req-id", "a string")

Set multi at once:

greq.New("some.host/api").
	SetHeaders(map[string]string{
		"req-id": "a string",
	})

Set content type

greq.New("some.host/api").
    ContentType("text/html")

Built in JSONType() FromType() XMLType()

greq.New("some.host/api").JSONType()

Use middleware

	buf := &bytes.Buffer{}
	mid0 := greq.MiddleFunc(func(r *http.Request, next greq.HandleFunc) (*greq.Response, error) {
		buf.WriteString("MID0>>")
		w, err := next(r)
		buf.WriteString(">>MID0")
		return w, err
	})

	mid1 := greq.MiddleFunc(func(r *http.Request, next greq.HandleFunc) (*greq.Response, error) {
		buf.WriteString("MID1>>")
		w, err := next(r)
		buf.WriteString(">>MID1")
		return w, err
	})

	mid2 := greq.MiddleFunc(func(r *http.Request, next greq.HandleFunc) (*greq.Response, error) {
		buf.WriteString("MID2>>")
		w, err := next(r)
		buf.WriteString(">>MID2")
		return w, err
	})

	resp, err := greq.New("https://httpbin.org").
		Doer(httpreq.DoerFunc(func(req *http.Request) (*http.Response, error) {
			tw := httptest.NewRecorder()
			buf.WriteString("(CORE)")
			return tw.Result(), nil
		})).
		Middleware(mid0, mid1, mid2).
		GetDo("/get")

    fmt.Println(buf.String())

Output:

MID2>>MID1>>MID0>>(CORE)>>MID0>>MID1>>MID2

More usage

Check response

• Response.IsOK() bool
• Response.IsFail() bool
• Response.IsEmptyBody() bool
• Response.IsJSONType() bool
• Response.IsContentType(prefix string) bool

Get response data

• Response.ContentType() string
• Response.Decode(ptr any) error

Request to string

    str := greq.New("https://httpbin.org").
		UserAgent("some-client/1.0").
		BasicAuth("inhere", "some string").
		JSONType().
		Body("hi, with body").
		Post("/post").
		String()

	fmt.Println(str)

Output:

POST https://httpbin.org/post/ HTTP/1.1
User-Agent: some-client/1.0
Authorization: Basic aW5oZXJlOnNvbWUgc3RyaW5n
Content-Type: application/json; charset=utf-8

hi, with body

Response to string

greq.Response.String() can convert response to string.

package main

import (
	"fmt"
	
	"github.com/gookit/goutil/dump"
	"github.com/gookit/greq"
)

func main() {
	resp, err := greq.New("https://httpbin.org").
		UserAgent("custom-client/1.0").
		Send("/get")
	
	if err != nil {
		panic(err)
	}

	fmt.Print(resp.String())
}

Output:

HTTP/2.0 200 OK
Access-Control-Allow-Origin: *
Access-Control-Allow-Credentials: true
Date: Tue, 18 Jan 2022 04:52:39 GMT
Content-Type: application/json
Content-Length: 272
Server: gunicorn/19.9.0

{
  "args": {}, 
  "headers": {
    "Accept-Encoding": "gzip", 
    "Host": "httpbin.org", 
    "User-Agent": "custom-client/1.0", 
    "X-Amzn-Trace-Id": "Root=1-61e64797-3e428a925f7709906a8b7c01"
  }, 
  "origin": "222.210.59.218", 
  "url": "https://httpbin.org/get"
}

Refers

• https://github.com/dghubble/sling
• https://github.com/zhshch2002/goreq
• https://github.com/go-resty/resty
• https://github.com/monaco-io/request