无法在 http 请求中设置 POST 正文

Question

这不是设置 POST 请求正文的正确方法吗？data := url.Values{}data.Set("url", "https://www.google.com/")client := http.Client{}r, err := http.NewRequest(http.MethodPost, apiURL, strings.NewReader(data.Encode()))下面的代码执行时表明请求url param中未发送任何内容POST。package mainimport (    "fmt"    "io/ioutil"    "net/http"    "net/url"    "strings")func doAPICall() {    // curl -XPOST -d 'url=https://www.google.com/' 'https://cleanuri.com/api/v1/shorten'    apiURL := "https://cleanuri.com/api/v1/shorten"    data := url.Values{}    data.Set("url", "https://www.google.com/")    client := http.Client{}    r, err := http.NewRequest(http.MethodPost, apiURL, strings.NewReader(data.Encode()))    if err != nil {        panic(err)    }    resp, err := client.Do(r)    if err != nil {        panic(err)    }    body, err := ioutil.ReadAll(resp.Body)    if err != nil {        panic(err)    }    fmt.Println(string(body))}func main() {    doAPICall()}输出：-$ go run .{"error":"API Error: URL is empty"}$ 

Answer 1

服务器期望 Content-Type 请求标头具有有效值。

r, err := http.NewRequest(http.MethodPost, apiURL, strings.NewReader(data.Encode()))

if err != nil {

    panic(err)

}

r.Header.Set("Content-Type", "application/x-www-form-urlencoded") // <-- add this line

resp, err := client.Do(r)

服务器还支持 JSON 请求体：

r, err := http.NewRequest(http.MethodPost, apiURL, strings.NewReader(`{"url": "https://www.google.com/"}`))

if err != nil {

    panic(err)

}

r.Header.Set("Content-Type", "application/json")

resp, err := http.DefaultClient.Do(r)

Answer 2

你可以做这样的事情

package main

import (

    "fmt"

    "io/ioutil"

    "net/http"

    "strings"

)

func main() {

    url := "https://cleanuri.com/api/v1/shorten"

    payload := strings.NewReader("url=https://www.google.com/")

    req, err := http.NewRequest("POST", url, payload)

    if err != nil {

        fmt.Println(err)

        return

    }

    req.Header.Add("content-type", "application/x-www-form-urlencoded")

    req.Header.Add("cache-control", "no-cache")

    res, err := http.DefaultClient.Do(req)

    if err != nil {

        fmt.Println(err)

        return

    }

    defer res.Body.Close()

    body, _ := ioutil.ReadAll(res.Body)

    fmt.Println(res)

    fmt.Println(string(body))

}