我正在嘗試代理 HTTP 調用，并嘗試在將 JSON 正文發送到代理服務之前對其進行修改。但是，如果我嘗試使用任何新數據修改c.Request.Body，則POST請求以400錯誤格式結束。但是，如果我再次將相同的先前正文數據設置為 c.Request.Body，則代理調用可以正常工作。杜松子酒功能func Forward(c *gin.Context) { remoteURL := c.Query("url") remote, _ := url.Parse(remoteURL) var bodyBytes []byte if c.Request.Body != nil { bodyBytes, _ = ioutil.ReadAll(c.Request.Body) } newBody := string(bodyBytes) newBody = strings.Replace(newBody, "testString", "testString1", -1) c.Request.Body = ioutil.NopCloser(bytes.NewBuffer([]byte(newBody))) proxy := httputil.NewSingleHostReverseProxy(remote) proxy.Director = func(req *http.Request) { req.Header = c.Request.Header req.Host = remote.Host req.URL.Scheme = remote.Scheme req.URL.Host = remote.Host req.URL.Path = remote.Path } proxy.ServeHTTP(c.Writer, c.Request)}卷曲命令：curl --location --request POST 'http://localhost:8020/v1/proxy?url=https://entgkdbyzqm27.x.pipedream.net/' \--header 'Content-Type: application/json' \--data-raw '{ "id": "testString"}'如果我能知道如何在Gin中正確設置請求正文，我將非常有義務。
1 回答
慕工程0101907
TA貢獻1887條經驗 獲得超5個贊
您可能有不匹配的情況。替換后，新主體比前一個主體長。Content-Length
按如下方式編寫函數：Director
proxy.Director = func(req *http.Request) {
// clone the headers
req.Header = c.Request.Header.Clone()
// 1. set new header
req.Header.Set("Content-Length", strconv.Itoa(len(newBody)))
// 2. also update this field
req.ContentLength = int64(len(newBody))
// the rest stays the same
req.Host = remote.Host
req.URL.Scheme = remote.Scheme
req.URL.Host = remote.Host
req.URL.Path = remote.Path
}
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