Golang爬虫基础：POST请求

使用标准库http中的Post方法来发送POST请求

func Post(url string, bodyType string, body io.Reader) (resp *Response, err error)

bodyType即请求头信息中的Content-Type字段的内容

一个简单的示例代码，post请求httpbin.org/get这个页面，返回请求的一些信息

package main

import (
    "fmt"
    "io/ioutil"
    "log"
    "net/http"
    "strings"
)

func main() {
    url := "http://httpbin.org/post"
    fmt.Printf("url: %s\n", url)

    res, err := http.Post(
        url,
        "application/x-www-form-urlencoded",
        strings.NewReader("name=nail"))
    if err != nil {
        log.Fatal(err)
    }
    defer res.Body.Close()

    body, err := ioutil.ReadAll(res.Body)
    if err != nil {
        log.Fatal(err)
    }

    fmt.Printf("%s\n", body)
}

运行结果：

url: http://httpbin.org/post
{
  "args": {}, 
  "data": "", 
  "files": {}, 
  "form": {
    "name": "nail"
  }, 
  "headers": {
    "Accept-Encoding": "gzip", 
    "Connection": "close", 
    "Content-Length": "9", 
    "Content-Type": "application/x-www-form-urlencoded", 
    "Host": "httpbin.org", 
    "User-Agent": "Go-http-client/1.1"
  }, 
  "json": null, 
  "origin": "139.159.214.194", 
  "url": "http://httpbin.org/post"
}