Windows Phone 8 http post文件上载超时
我正在开发一个Windows phone 8应用程序，需要将照片上传到amazon s3存储。但是，我发现这是不可能的，因为无论我使用什么超时设置，HttpClient都会在大约60秒后超时 真的没有办法从Windows Phone上传大文件吗 BackgroundTransferRequest是无用的，因为它无法在文件上载时发送必要的元数据 我使用的代码超时：Windows Phone 8 http post文件上载超时,http,file-upload,windows-phone-8,amazon-s3,timeout,Http,File Upload,Windows Phone 8,Amazon S3,Timeout,我正在开发一个Windows phone 8应用程序，需要将照片上传到amazon s3存储。但是，我发现这是不可能的，因为无论我使用什么超时设置，HttpClient都会在大约60秒后超时 真的没有办法从Windows Phone上传大文件吗 BackgroundTransferRequest是无用的，因为它无法在文件上载时发送必要的元数据 我使用的代码超时： using (var httpClient = new HttpClient()) { httpClient.Timeout
using (var httpClient = new HttpClient())
{
httpClient.Timeout = TimeSpan.FromMinutes(30);
HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, m_uploadUrl);
httpContent.Headers.Add("Keep-Alive", "true");
request.Content = httpContent; // 3-5 Mb file
response = await httpClient.SendAsync(request);
statusCode = response.StatusCode;
}
关于如何上传需要60秒以上才能发送的文件有什么想法吗？我也遇到了类似的问题。超时故障。 检查是否可以使用其他类而不是HttpClient。 网络客户端可能是 检查这是否有助于您： 即使这样：
我已经用了好几天的时间来实现一个新的上传程序，并让所有的细节都正常工作。我将HttpWebRequest与异步方法一起使用，并将该文件拆分为Chunck。最后，我让它工作，它上传没有超时。以下是完整的代码：
using System;
using Models;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
namespace Services
{
public class UploadData
{
public Stream PostStream { get; set; }
public Stream FileStream { get; set; }
public byte[] HeaderBytes {get; set;}
public byte[] FooterBytes {get; set;}
public byte[] Buffer { get; set; }
public Photo Upload { get; set; }
public int BytesWritten { get; set; }
}
public class UploadEventArgs : EventArgs
{
public Photo Upload { get; set; }
public int Progress { get; set; }
}
public class UploadService
{
public delegate void CompletedEventHandler(object sender, UploadEventArgs e);
public event CompletedEventHandler UploadCompleted;
public delegate void ProgressEventHandler(object sender, UploadEventArgs e);
public event ProgressEventHandler ProgressChanged;
private static string contentType = "multipart/form-data; boundary={0}";
private static string headerString = "Content-Disposition: form-data; name=\"file\"; filename=\"{0}\"\r\nContent-Type: Content-Type: application/octet-stream\r\n\r\n";
private HttpWebRequest m_request;
private static string boundarystr;
private UploadData m_uploadData;
private bool m_isStopped;
public async Task StartUpload(Photo upload, Uri uri, Dictionary<string, string> parameters)
{
try
{
m_isStopped = false;
var fileStream = (await upload.File.OpenReadAsync()).AsStreamForRead();
var uploadData = new UploadData();
boundarystr = "---------------------------" + DateTime.Now.Ticks.ToString("x");
string para = GetParamsString(parameters);
string headAndParams = para + String.Format(headerString, HttpUtility.UrlEncode(upload.File.Name));
var headerBytes = System.Text.Encoding.UTF8.GetBytes(headAndParams);
var footerBytes = Encoding.UTF8.GetBytes("\r\n--" + boundarystr + "--\r\n");
uploadData.Upload = upload;
uploadData.FileStream = fileStream;
uploadData.FooterBytes = footerBytes;
uploadData.HeaderBytes = headerBytes;
uploadData.BytesWritten = 0;
m_uploadData = uploadData;
m_request = (HttpWebRequest)WebRequest.Create(uri);
m_request.Method = "POST";
m_request.AllowWriteStreamBuffering = false;
m_request.ContentType = string.Format(contentType, boundarystr);
m_request.ContentLength = fileStream.Length + headerBytes.Length + footerBytes.Length;
var asyncResult = m_request.BeginGetRequestStream((ar) => { GetRequestStreamCallback(ar, uploadData); }, m_request);
}
catch (Exception ex)
{
m_uploadData.Upload.UploadInfo.StatusCode = HttpStatusCode.NotFound;
m_uploadData.Upload.UploadInfo.Exception = new Exception("Start upload failed: " + ex.Message);
var argsStopped = new UploadEventArgs();
argsStopped.Upload = m_uploadData.Upload;
m_uploadData.FileStream.Close();
m_uploadData.PostStream.Close();
OnUploadComplete(argsStopped);
}
}
private void GetRequestStreamCallback(IAsyncResult asynchronousResult, UploadData uploadData)
{
try
{
HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;
Stream postStream = request.EndGetRequestStream(asynchronousResult);
postStream.Write(uploadData.HeaderBytes, 0, uploadData.HeaderBytes.Length);
var args = new UploadEventArgs();
args.Upload = uploadData.Upload;
args.Progress = 1;
OnProgressChanged(args);
uploadData.PostStream = postStream;
WriteNextChunck(uploadData);
}
catch (Exception ex)
{
m_uploadData.Upload.UploadInfo.StatusCode = HttpStatusCode.NotFound;
m_uploadData.Upload.UploadInfo.Exception = new Exception("Header write failed: " + ex.Message);
var argsStopped = new UploadEventArgs();
argsStopped.Upload = m_uploadData.Upload;
m_uploadData.FileStream.Close();
m_uploadData.PostStream.Close();
OnUploadComplete(argsStopped);
}
}
private void WriteNextChunck(UploadData upload)
{
try
{
if ((upload.FileStream.Length - upload.BytesWritten) >= 16 * 1024)
{
upload.Buffer = new byte[16 * 1024];
}
else
{
// Last part
upload.Buffer = new byte[upload.FileStream.Length - upload.BytesWritten];
}
upload.FileStream.Read(upload.Buffer, 0, (int)upload.Buffer.Length);
upload.PostStream.BeginWrite(upload.Buffer, 0, upload.Buffer.Length, BeginWriteCallback, upload);
}
catch (Exception ex)
{
m_uploadData.Upload.UploadInfo.StatusCode = HttpStatusCode.NotFound;
m_uploadData.Upload.UploadInfo.Exception = new Exception("Buffer write failed: " + ex.Message);
var argsStopped = new UploadEventArgs();
argsStopped.Upload = m_uploadData.Upload;
upload.FileStream.Close();
upload.PostStream.Close();
OnUploadComplete(argsStopped);
}
}
private void BeginWriteCallback(IAsyncResult ar)
{
try
{
var upload = ar.AsyncState as UploadData;
upload.PostStream.EndWrite(ar);
upload.BytesWritten += upload.Buffer.Length;
var args = new UploadEventArgs();
args.Upload = upload.Upload;
args.Progress = (int)(((decimal)upload.BytesWritten / (decimal)upload.FileStream.Length) * 100);
OnProgressChanged(args);
if (m_isStopped)
{
upload.FileStream.Close();
upload.PostStream.Close();
m_uploadData.Upload.UploadInfo.StatusCode = HttpStatusCode.NotFound;
m_uploadData.Upload.UploadInfo.Exception = new Exception("Upload stopped");
var argsStopped = new UploadEventArgs();
argsStopped.Upload = m_uploadData.Upload;
OnUploadComplete(argsStopped);
return;
}
// write next chunck
if (upload.BytesWritten < upload.FileStream.Length)
{
WriteNextChunck(upload);
}
if (upload.BytesWritten >= upload.FileStream.Length)
{
WriteFooter(upload);
}
}
catch (Exception ex)
{
m_uploadData.Upload.UploadInfo.StatusCode = HttpStatusCode.NotFound;
m_uploadData.Upload.UploadInfo.Exception = new Exception("Upload write failed: " + ex.Message);
var argsStopped = new UploadEventArgs();
argsStopped.Upload = m_uploadData.Upload;
OnUploadComplete(argsStopped);
}
}
private void WriteFooter(UploadData upload)
{
try
{
upload.PostStream.Write(upload.FooterBytes, 0, upload.FooterBytes.Length);
upload.PostStream.Close();
var asyncResult = m_request.BeginGetResponse(new AsyncCallback(GetResponseCallback), m_request);
}
catch (Exception ex)
{
m_uploadData.Upload.UploadInfo.StatusCode = HttpStatusCode.NotFound;
m_uploadData.Upload.UploadInfo.Exception = new Exception("Footer write failed: " + ex.Message);
var argsStopped = new UploadEventArgs();
argsStopped.Upload = m_uploadData.Upload;
OnUploadComplete(argsStopped);
}
}
private void GetResponseCallback(IAsyncResult asynchronousResult)
{
try
{
HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;
HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asynchronousResult);
Stream streamResponse = response.GetResponseStream();
StreamReader streamRead = new StreamReader(streamResponse);
string responseString = streamRead.ReadToEnd();
streamResponse.Close();
streamRead.Close();
response.Close();
m_uploadData.FileStream.Close();
m_uploadData.Upload.UploadInfo.StatusCode = response.StatusCode;
if (response.StatusCode == HttpStatusCode.NoContent)
{
m_uploadData.Upload.UploadInfo.Exception = null;
}
else
{
m_uploadData.Upload.UploadInfo.Exception = new Exception(responseString);
}
var args = new UploadEventArgs();
args.Upload = m_uploadData.Upload;
args.Progress = 100;
OnUploadComplete(args);
}
catch (Exception ex)
{
m_uploadData.Upload.UploadInfo.StatusCode = HttpStatusCode.NotFound;
m_uploadData.Upload.UploadInfo.Exception = ex;
var args = new UploadEventArgs();
args.Upload = m_uploadData.Upload;
OnUploadComplete(args);
}
}
private string GetParamsString(Dictionary<string, string> parameters)
{
bool needsCLRF = false;
string result = "";
foreach (var param in parameters)
{
// Thanks to feedback from commenters, add a CRLF to allow multiple parameters to be added.
// Skip it on the first parameter, add it to subsequent parameters.
if (needsCLRF)
result += "\r\n";
needsCLRF = true;
string prm = string.Format("--{0}\r\nContent-Type: text/plain; charset=utf-8\r\nContent-Disposition: form-data; name={1}\r\n\r\n{2}",
boundarystr,
param.Key,
param.Value);
result += prm;
}
// Add the end of the request. Start with a newline
string footer = "\r\n--" + boundarystr + "\r\n";
result += footer;
return result;
}
protected virtual void OnUploadComplete(UploadEventArgs e)
{
if (UploadCompleted != null)
UploadCompleted(this, e);
}
protected virtual void OnProgressChanged(UploadEventArgs e)
{
if (ProgressChanged != null)
ProgressChanged(this, e);
}
public void Stop()
{
m_isStopped = true;
}
}
}
我尝试了HttpWebRequest，但也遇到了同样的问题。我一降低带宽，请求就会在60秒后失败。甚至我已经用HttpWebRequest做了一些事情。胡闹了很多。同样的问题。超时。确切地我甚至还上了一堂课，介绍了所有可能的http通信方式：D发布所有方式，甚至同步和异步。同样的问题。不过，以上方法为我解决了问题。谢谢。第一个链接与我正在做的没有什么不同。我将尝试第二个one WebClient，看看这是否更好。您看过AWS SDK for.NET V2中的Windows Phone 8支持了吗？是的，但据我所知，我需要在应用程序中嵌入密钥才能做到这一点。使用HTTPPOST，我不需要它，因为我有一个策略和一个签名。