func httpPostJSON(clt *http.Client, url string, body []byte, response interface{}) error {
api.DebugPrintPostJSONRequest(url, body)
httpResp, err := clt.Post(url, "application/json; charset=utf-8", bytes.NewReader(body))
if err != nil {
return err
}
defer httpResp.Body.Close()
if httpResp.StatusCode != http.StatusOK {
return fmt.Errorf("http.Status: %s", httpResp.Status)
}
return api.DecodeJSONHttpResponse(httpResp.Body, response)
}
func httpDownloadToWriter(clt *http.Client, url string, body []byte, buf []byte, writer io.Writer, errorResult *core.Error) (written int64, err error) {
api.DebugPrintPostJSONRequest(url, body)
httpResp, err := clt.Post(url, "application/json; charset=utf-8", bytes.NewReader(body))
if err != nil {
return 0, err
}
defer httpResp.Body.Close()
if httpResp.StatusCode != http.StatusOK {
return 0, fmt.Errorf("http.Status: %s", httpResp.Status)
}
buf2 := buf // 保存预先读取的少量头部信息
switch n, err := io.ReadFull(httpResp.Body, buf2); err {
case nil:
break
case io.ErrUnexpectedEOF:
buf2 = buf2[:n]
break
case io.EOF: // 基本不会出现
return 0, nil
default:
return 0, err
}
var httpRespBody io.Reader
if len(buf2) < len(buf) {
httpRespBody = bytes.NewReader(buf2)
} else {
httpRespBody = io.MultiReader(bytes.NewReader(buf2), httpResp.Body)
}
buf3 := trimLeft(buf2)
if bytes.HasPrefix(buf3, errRespBeginWithCode) || bytes.HasPrefix(buf3, errRespBeginWithMsg) {
// 返回的是错误信息
return 0, api.DecodeJSONHttpResponse(httpRespBody, errorResult)
} else {
// 返回的是媒体流
return io.Copy(writer, httpRespBody)
}
}