如何在 Go 的 POST 请求中发送 JSON 字符串

I tried working with Apiary and made a universal template to send JSON to mock server and have this code:

package main

import (
    "encoding/json"
    "fmt"
    "github.com/jmcvetta/napping"
    "log"
    "net/http"
)

func main() {
    url := "http://restapi3.apiary.io/notes"
    fmt.Println("URL:>", url)

    s := napping.Session{}
    h := &http.Header{}
    h.Set("X-Custom-Header", "myvalue")
    s.Header = h

    var jsonStr = []byte(`
{
    "title": "Buy cheese and bread for breakfast."
}`)

    var data map[string]json.RawMessage
    err := json.Unmarshal(jsonStr, &data)
    if err != nil {
        fmt.Println(err)
    }

    resp, err := s.Post(url, &data, nil, nil)
    if err != nil {
        log.Fatal(err)
    }
    fmt.Println("response Status:", resp.Status())
    fmt.Println("response Headers:", resp.HttpResponse().Header)
    fmt.Println("response Body:", resp.RawText())

}

This code doesn't send JSON properly, but I don't know why. The JSON string can be different in every call. I can't use Struct for this.

转载于:https://stackoverflow.com/questions/24455147/how-do-i-send-a-json-string-in-a-post-request-in-go

csdnceshi69
YaoRaoLov i dug into napping's source code, if payload is set, they call json.Marshall on it, I'm not sure why it wasn't working for him.
大约 5 年之前 回复
weixin_41568134
MAO-EYE A little tip, you can create your message as a struct or map[string]interface{} to add all the values you want and then use json.Marshall to convert the map or struct to a json.
大约 5 年之前 回复
csdnceshi64
游.程 why are you unmarshaling the json if you want to send json?
大约 5 年之前 回复
weixin_41568134
MAO-EYE I'm not familiar with some of the libraries you use, but as I understand it, you are trying to send a map of Jsons. Why don't you just send the string with the json?
大约 5 年之前 回复

3个回答

I'm not familiar with napping, but using Golang's net/http package works fine (playground):

func main() {
    url := "http://restapi3.apiary.io/notes"
    fmt.Println("URL:>", url)

    var jsonStr = []byte(`{"title":"Buy cheese and bread for breakfast."}`)
    req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonStr))
    req.Header.Set("X-Custom-Header", "myvalue")
    req.Header.Set("Content-Type", "application/json")

    client := &http.Client{}
    resp, err := client.Do(req)
    if err != nil {
        panic(err)
    }
    defer resp.Body.Close()

    fmt.Println("response Status:", resp.Status)
    fmt.Println("response Headers:", resp.Header)
    body, _ := ioutil.ReadAll(resp.Body)
    fmt.Println("response Body:", string(body))
}
csdnceshi50
三生石@ Can this be updated to gather / inspect all it's errors? This is (for me, at least) the top result on google for making post requests in Go, and it's a good answer, but I see a ton of example code that just ignores errors, and I think it encourages bad practice in newbies. Then again, if anyone regularly ignores errors, I suppose they'll learn why not to eventually, but why not encourage good practice to begin with?
11 个月之前 回复
weixin_41568131
10.24 Just a warning, don't forget that by default the golang http client never times out, so for the real world, best to set something along the lines of client.Timeout = time.Second * 15
大约一年之前 回复
csdnceshi51
旧行李 +1 for solid band name suggestion.
一年多之前 回复
csdnceshi61
derek5. may this link help you
一年多之前 回复
csdnceshi62
"幸运的战士" it can't work on the playground, I just used it to paste the code, you can't open external connections from it.
2 年多之前 回复
weixin_41568208
北城已荒凉 now it have panics on playground. May be you shold fix or update something?
2 年多之前 回复

you can just use post to post your json.

values := map[string]string{"username": username, "password": password}

jsonValue, _ := json.Marshal(values)

resp, err := http.Post(authAuthenticatorUrl, "application/json", bytes.NewBuffer(jsonValue))
weixin_41568174
from.. I'm on go 1.7, if it matters. The code listed by @OneOfOne works (which also uses bytes.NewBuffer() but uses http.NewRequest instead of http.Post)
2 年多之前 回复
csdnceshi67
bug^君 i think you may get wrong io.Reader for http.Post, and bytes.NewBuffer() works well in my code
2 年多之前 回复
weixin_41568174
from.. I get this error : cannot use jsonValue (type []byte) as type io.Reader in argument to http.Post: []byte does not implement io.Reader (missing Read method)
2 年多之前 回复

In addition to standard net/http package, you can consider using my GoRequest which wraps around net/http and make your life easier without thinking too much about json or struct. But you can also mix and match both of them in one request! (you can see more details about it in gorequest github page)

So, in the end your code will become like follow:

func main() {
    url := "http://restapi3.apiary.io/notes"
    fmt.Println("URL:>", url)
    request := gorequest.New()
    titleList := []string{"title1", "title2", "title3"}
    for _, title := range titleList {
        resp, body, errs := request.Post(url).
            Set("X-Custom-Header", "myvalue").
            Send(`{"title":"` + title + `"}`).
            End()
        if errs != nil {
            fmt.Println(errs)
            os.Exit(1)
        }
        fmt.Println("response Status:", resp.Status)
        fmt.Println("response Headers:", resp.Header)
        fmt.Println("response Body:", body)
    }
}

This depends on how you want to achieve. I made this library because I have the same problem with you and I want code that is shorter, easy to use with json, and more maintainable in my codebase and production system.

weixin_41568196
撒拉嘿哟木头 It's always a terrible idea to contribute code examples of skipping TLS verification in any scenario in any language... you accidentally perpetuate a lot copy/paste "workarounds" by neophytes who visit StackOverflow and don't understand the nature of why fixing TLS errors is crucial. Either fix your certificate import path (if using self-signed for testing, import those) or fix your machine's certificate chain, or find out why your server is presenting an invalid certificate that can't be verified by your client.
接近 4 年之前 回复
csdnceshi73
喵-见缝插针 If GoRequest wraps net/http. Is it possible to add this to disable the Insecure certificate for TLS ? tr := &http.Transport{ TLSClientConfig: &tls.Config{InsecureSkipVerify: true}, }
接近 4 年之前 回复
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sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:236)rn at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:194)rn at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:216)rn ... 65 morern2012-10-16 11:56:58 org.apache.catalina.core.ApplicationDispatcher invokern严重: Servlet.service() for servlet jsp threw exceptionrn哪位大牛指点。。。谢了...
java发送post请求
一、依赖&amp;lt;dependency&amp;gt; &amp;lt;groupId&amp;gt;org.apache.httpcomponents&amp;lt;/groupId&amp;gt; &amp;lt;artifactId&amp;gt;httpclient&amp;lt;/artifactId&amp;gt; &amp;lt;version&amp;gt;4.2.5&amp;lt;/version&amp;gt; &amp;lt;/dependency&amp
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requests发送post请求
import requests, json url_mul = ‘http://httpbin.org/post’ files = {‘file’: open(’./userinfo.txt’, ‘rb’)} r = requests.post(url_mul, files=files) print® print(r.text) print(r.content) ...
https发送post请求
https发送post请求,并接收响应信息。
jQuery发送post请求
本课程是《 java就业班》系统课程的第18章,全套课程精细讲解,该课程超过其他机构30%的课程量,经过我们全套课程系统学习的同学,可轻松从事Java高级工程师或系统架构师岗位,课程提供全套代码笔记其它相关素材及答疑服务,可谓是低投资高回报!
Ajax之post请求发送
本课程是《 java就业班》系统课程的第17章,全套课程精细讲解,该课程超过其他机构30%的课程量,经过我们全套课程系统学习的同学,可轻松从事Java高级工程师或系统架构师岗位,课程提供全套代码笔记其它相关素材及答疑服务,可谓是低投资高回报!学习前或学习后有任何疑问请在课程中提问,老师看到会第一时间回复!
Ajax发送Post请求
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PHP 发送POST请求
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Scrapy发送POST请求
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WebAPi 发送Post请求
/// &amp;lt;summary&amp;gt;        /// Post接口方法        /// &amp;lt;/summary&amp;gt;        /// &amp;lt;param name=&quot;requestUri&quot;&amp;gt;&amp;lt;/param&amp;gt;        /// &amp;lt;param name=&quot;json&quot;&amp;gt;&amp;lt;/param&amp;gt;        /// &
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var http = require('http'); var querystring =require('querystring'); var post_data = querystring.stringify({ 'wifi_name':'user', 'code':'123456' }); var options = { hostname:'www.myserver.com', //
http 发送post请求
http post发送请求
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scrapy发送post请求
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pyspider发送post请求
python psypider base64 post
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curl -H &quot;Content-Type: application/json&quot; -X POST --data '{&quot;jsonrpc&quot;:&quot;2.0&quot;,&quot;method&quot;:&quot;NET.getWanParam&quot;,&quot;params&quot;:[],&quot;id&quot;:67}' http://192.168.200.1/cgi-bin/router
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