如何在http响应正文中返回编码的字符串？

问题描述：

在http共振中添加编码字符串似乎用！F（MISSING）替换了某些字符。

Adding an encoded string to an http resonse seems to replace some characters with !F(MISSING). How that that be prevented?

输出：

{ encodedText： M6c8RqL61nMFy％！F（MISSING ）hQmciSYrh9ZXgVFVjO}

{"encodedText":"M6c8RqL61nMFy%!F(MISSING)hQmciSYrh9ZXgVFVjO"}

代码：

package main

import (
    "encoding/json"
    "fmt"
    "net/http"
    "net/url"
)

type EncodeResult struct {
    EncodedText string `json:"encodedText"`
}

func main() {

    http.HandleFunc("/encodedString", encodedString)
    _ = http.ListenAndServe(":8080", nil)
}

func encodedString(w http.ResponseWriter, r *http.Request) {

    inputString := "M6c8RqL61nMFy/hQmciSYrh9ZXgVFVjO"
    er := EncodeResult{url.QueryEscape(inputString)}
    response, _ := json.Marshal(er)

    w.Header().Set("Content-Type", "application/json")
    fmt.Fprintf(w, string(response))
}

答

您正在使用转义的值 M6c8RqL61nMFy％2 FhQmciSYrh9ZXgVFVjO作为此行上的格式字符串：

You are using the escaped value "M6c8RqL61nMFy%2FhQmciSYrh9ZXgVFVjO " as a format string on this line:

fmt.Fprintf(w, string(response))

Fprintf尝试格式化动词％2F的自变量。没有参数，因此Fprintf为动词打印％！F（MISSING）。

Fprintf attempts to format an argument for the verb "%2F". There is no argument, so Fprintf prints "%!F(MISSING)" for the verb.

解决方法是不要将输出用作格式字符串。因为写入响应时不需要任何格式，所以将最后一行更改为：

The fix is to not use the output as a format string. Because you don't need any formatting when writing to the response, change the last line to:

w.Write(response)

如何在http响应正文中返回编码的字符串？

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