HttpWebRequest WebClient 无法接受数据，求大神

[wp_drifter]

WebClient

  try
            {
                WebClient wc = new WebClient();
                wc.Headers.Add("Content-Type", "application/json");
                wc.Headers.Add("Cookie", "rmbUser=true; userName=25120811004; " + FullWebBrowserCookie.GetCookieInternal(new Uri("http://155.16.161.15:8082"), true));
                byte[] postData = Encoding.UTF8.GetBytes(paramStr);
                byte[] responseData = wc.UploadData(uri, "POST", postData); 
                return Encoding.UTF8.GetString(responseData); 
            }
            catch (Exception ex) { return ex.ToString(); }

HttpWebRequest

 CookieContainer myCookieContainer = new CookieContainer();
            Uri uri = new Uri("http://155.16.161.15:8082");
            string cookieStr = "rmbUser=true;userName=25120811004;" + FullWebBrowserCookie.GetCookieInternal(uri, true);
            string[] cookstr = cookieStr.Split(';');
            foreach (string str in cookstr)
            {
                string[] cookieNameValue = str.Split('=');
                Cookie ck = new Cookie(cookieNameValue[0].Trim().ToString(), cookieNameValue[1].Trim().ToString());
                myCookieContainer.Add(uri, ck);
            }
            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);
            request.Method = "POST";
            request.ContentType = "application/json";
            request.Accept = "application/json, text/javascript, */*; q=0.01";
            request.Headers.Add("Accept-Encoding", "gzip, deflate");
            request.Timeout = 15000;
            request.AllowAutoRedirect = true;
            request.CookieContainer = myCookieContainer;
            request.Referer = referer;
            StreamWriter requestStream = null;
            HttpWebResponse response = null;
            string responseStr = null;
            try
            {
                requestStream = new StreamWriter(request.GetRequestStream());
                requestStream.Write(param);
                requestStream.Close();

                response = (HttpWebResponse)request.GetResponse();
                if (response != null)
                { 
                    Stream st = response.GetResponseStream();
                    if (response.ContentEncoding.ToLower().Contains("gzip"))
                        st = new GZipStream(st, CompressionMode.Decompress);
                    StreamReader reader = new StreamReader(st, Encoding.UTF8);
                    responseStr = reader.ReadToEnd();
                    reader.Close();
                }
            }
            catch (Exception ex)
            {
                showMsg(ex.ToString());
                throw;
            }
            finally
            {
                request = null;
                requestStream = null;
                response = null;
            }
            return responseStr;

接口





注：就这一个接口获取不到数据，其他这个网站的接口都可以获取的到json数据

其中json字段为空就是这个接口无法获取返回的数据


下面是可以获取数据的接口


这个是可以获取到数据的，对应的数据库id=1280

求大神讲解为什么第一个获取不到数据

[正怒月神]

你传递的postData格式正确吗？ 那个有问题的接口，能正确解析你传递的json吗？ 会不会出现异常导致接口访问的失败？查找日志

[wp_drifter]

引用 1 楼 hanjun0612 的回复:

你传递的postData格式正确吗？ 那个有问题的接口，能正确解析你传递的json吗？ 会不会出现异常导致接口访问的失败？查找日志

这个问题我肯定是检查了N次了，接口是别人的 我只能确保我这边发送的json格式是完全正确的

[猪猪猪爱的]

你第一个接口的POST是流的 文件或者图片上传的method是不一样的。 下面是客户端的异步传输代码 楼主可以参考一下 using (HttpClient client = new HttpClient()) { client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("text/json")); using (var content = new MultipartFormDataContent()) { List<ByteArrayContent> files = new List<ByteArrayContent>(); foreach (var file in Request.PhotoList) { var fileContent = new ByteArrayContent(File.ReadAllBytes(file.FilePath)); fileContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment") { FileName = Path.GetFileName(file.FilePath) }; files.Add(fileContent); } Action<List<ByteArrayContent>> act = (dataContents) => { foreach (var byteArrayContent in dataContents) { content.Add(byteArrayContent); } }; act(files); var Response = client.PostAsync(ClientUrl, content).Result; if (Response != null && Response.IsSuccessStatusCode) {.................} } } }

[wp_drifter]

至今还未解决