Question

您好我在GO中创建了一个POST请求，但它在实际完成之前终止，例如我正在尝试拉出一个泊坞窗图像，这可以通过以下方式完成卷曲：

curl -X POST https://address/images/create?fromImage=imagename

返回以下内容

{"status":"Pulling from imagename","id":"latest"}
{"status":"Already exists","progressDetail":{},"id":"3d30e94188f7"}
{"status":"Already exists","progressDetail":{},"id":"bf4e27765153"}
{"status":"Already exists","progressDetail":{},"id":"67280fd39fba"}
.... many of those
{"status":"Pull complete","progressDetail":{},"id":"21c062e2346f"}
{"status":"Digest: sha256:24f26a1344fca6d5ee1adcdsf2d01b20d7823c560ed9d2193466e36bd1f049088"}
{"status":"Pulling from imagename","id":"20161005"}
{"status":"Digest: sha256:f527dsfds88676eb25d8f7de5406f46cbc3a995345ddb4bb3d08fcf110458fe3cf"}
{"status":"Status: Downloaded newer image for imagename"}

并成功拉出图像

但如果我试着去

func PullImage(imagename string, uuid string) error {
logFields := log.Fields{

    "handler": "PullImage",
    "uuid":    uuid,
}

log.WithFields(logFields).Debugf("imagename:%v", imagename)

url := fmt.Sprintf("https://%s/images/create?fromImage%s", sconf.Docker.Endpoint, imagename)
req, err := http.NewRequest("POST", url, nil)

req.Header.Set("Content-Type", "application/json")
resp, err := client.Do(req)

log.WithFields(logFields).Infof("call url:%s", url)
if err != nil {
    log.WithFields(logFields).Errorf("Error in call url (%s) :%s", url, err)

    return errors.New(fmt.Sprintf("Error in call url (%s) :%s", url, err))
}


var pullresbody interface{}
err = json.NewDecoder(resp.Body).Decode(&pullresbody)
if err != nil {
    log.WithFields(logFields).Errorf("Could not unmarshal json: %s", err)
    return errors.New(fmt.Sprintf("Could not unmarshal json: %s", err))
}

    log.WithFields(logFields).Infof("response of url %s:%+v", url, resp)
log.WithFields(logFields).Infof("response body:%+v", pullresbody)
   return nil

}

然后我在日志中得到这个：

map[status:Pulling from imagename]

并且没有拉动图像所以在真正完成之前连接已停止如何解决这个问题？

Answer 1

Decoder一次只能从流中解码一个对象。要获取所有对象，您需要类似

的内容

var pullRespBody interface{}
dec := json.NewDecoder(resp.Body)
var err error
for err == nil {
    err = dec.Decode(&pullRespBody)
    // Check err...
    log.WithFields(logFields).Infof("response body:%+v", pullRespBody)
    // Do something else with pullRespBody...
}
// Deal with err...

如何在GO中完成POST请求？

1 个答案: