如何在 Go 中的 POST 请求中发送 JSON 字符串
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How do I send a JSON string in a POST request in Go
提问by Ladislav Prskavec
I tried working with Apiary and made a universal template to send JSON to mock server and have this code:
我尝试使用 Apiary 并制作了一个通用模板来将 JSON 发送到模拟服务器并使用以下代码：
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 Structfor this.
此代码未正确发送 JSON，但我不知道为什么。JSON 字符串在每次调用中都可以不同。我不能用Struct这个。
回答by OneOfOne
I'm not familiar with napping, but using Golang's net/httppackage works fine (playground):
我不熟悉小睡，但使用 Golang 的net/http包工作正常（操场）：
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))
}
回答by gaozhidf
you can just use postto post your json.
你可以post用来发布你的json。
values := map[string]string{"username": username, "password": password}
jsonValue, _ := json.Marshal(values)
resp, err := http.Post(authAuthenticatorUrl, "application/json", bytes.NewBuffer(jsonValue))
回答by Ninh Pham
If you already have a struct.
如果你已经有一个结构。
type Student struct {
Name string `json:"name"`
Address string `json:"address"`
}
// .....
body := &Student{
Name: "abc",
Address: "xyz",
}
buf := new(bytes.Buffer)
json.NewEncoder(buf).Encode(body)
req, _ := http.NewRequest("POST", url, buf)
client := &http.Client{}
res, e := client.Do(req)
if e != nil {
return e
}
defer res.Body.Close()
fmt.Println("response Status:", res.Status)
// Print the body to the stdout
io.Copy(os.Stdout, res.Body)
Full gist.
完整的要点。
回答by A-letubby
In addition to standard net/http package, you can consider using my GoRequestwhich 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)
除了标准的 net/http 包之外，您还可以考虑使用我的GoRequest，它环绕着 net/http，让您的生活更轻松，而无需过多考虑 json 或 struct。但是您也可以在一个请求中混合和匹配它们！（您可以在 gorequest github 页面中查看更多详细信息）
So, in the end your code will become like follow:
因此，最终您的代码将变成如下所示：
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.
这取决于你想如何实现。我创建这个库是因为我和你有同样的问题，我想要代码更短，更容易与 json 一起使用，并且在我的代码库和生产系统中更易于维护。
