我构建了一个 windows-mobile 6.5 应用程序（基于 cf 2.0）并且对一种方法的特殊测试用例有问题。所以我希望有人能给我一个建议或有一个有用的想法，这种行为的原因是什么......
该方法每 30 秒从线程内部连续调用一次，查找要通过 HTTP 请求传输到 Web 服务器 (jboss) 的文件，然后将它们带上。服务器 url 本身在我的控制之下。
一切正常……直到我停止 Web 服务器并强制出现 503 服务器错误。到目前为止，一切都很好。但是在重新启动 Web 服务器后，我希望下一次调用 transfer 方法将成功结束 - 但事实并非如此。每次进一步的尝试都会以超时异常结束，我必须重新启动应用程序以使其再次工作。
所以我的问题是：问题出在哪里，当我想在之前的尝试失败并出现错误 503 后连接到 uri 时？似乎，有一些东西被缓存了，但它到底应该是什么？
非常感谢您的每一个提示。
于尔根
public static Boolean HttpUploadFile2(string url, string file)
{
HttpWebRequest requestToServer = null;
WebResponse response = null;
try
{
Logger.writeToLogFileCom(string.Format("Uploading {0} to {1}", file, url));
requestToServer = (HttpWebRequest)WebRequest.Create(url);
requestToServer. Timeout = 40000;
string boundaryString = "----SSLBlaBla";
requestToServer.AllowWriteStreamBuffering = false;
requestToServer.Method = "POST";
requestToServer.ContentType = "multipart/form-data;
boundary=" + boundaryString;
requestToServer.KeepAlive = false;
ASCIIEncoding ascii = new ASCIIEncoding();
string boundaryStringLine = "\r\n--" + boundaryString + "\r\n";
byte[] boundaryStringLineBytes = ascii.GetBytes(boundaryStringLine);
string lastBoundaryStringLine = "\r\n--" + boundaryString + "--\r\n";
byte[] lastBoundaryStringLineBytes = ascii.GetBytes(lastBoundaryStringLine);
// Get the byte array of the myFileDescription content disposition
string myFileDescriptionContentDisposition = String.Format(
"Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}",
"myFileDescription",
"A sample file description");
byte[] myFileDescriptionContentDispositionBytes
= ascii.GetBytes(myFileDescriptionContentDisposition);
string fileUrl = file;
// Get the byte array of the string part of the myFile content
// disposition
string myFileContentDisposition = String.Format(
"Content-Disposition: form-data;name=\"{0}\"; "
+ "filename=\"{1}\"\r\nContent-Type: {2}\r\n\r\n",
"myFile", Path.GetFileName(fileUrl), Path.GetExtension(fileUrl));
byte[] myFileContentDispositionBytes =
ascii.GetBytes(myFileContentDisposition);
FileInfo fileInfo = new FileInfo(fileUrl);
// Calculate the total size of the HTTP request
long totalRequestBodySize = boundaryStringLineBytes.Length * 2
+ lastBoundaryStringLineBytes.Length
+ myFileDescriptionContentDispositionBytes.Length
+ myFileContentDispositionBytes.Length
+ fileInfo.Length;
// And indicate the value as the HTTP request content length
requestToServer.ContentLength = totalRequestBodySize;
// Write the http request body directly to the server
using (Stream s = requestToServer.GetRequestStream())
{
//TIMEOUT OCCURED WHEN CALLING GetRequestStream
// Send the file description content disposition over to the server
s.Write(boundaryStringLineBytes, 0, boundaryStringLineBytes.Length);
s.Write(myFileDescriptionContentDispositionBytes, 0,
myFileDescriptionContentDispositionBytes.Length);
// Send the file content disposition over to the server
s.Write(boundaryStringLineBytes, 0, boundaryStringLineBytes.Length);
s.Write(myFileContentDispositionBytes, 0,
myFileContentDispositionBytes.Length);
// Send the file binaries over to the server, in 1024 bytes chunk
FileStream fileStream = new FileStream(fileUrl, FileMode.Open,
FileAccess.Read);
byte[] buffer = new byte[1024];
int bytesRead = 0;
Logger.writeToLogFileCom("writing data...");
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
{
s.Write(buffer, 0, bytesRead);
} // end while
fileStream.Close();
Logger.writeToLogFileCom("... finished, File closed");
// Send the last part of the HTTP request body
s.Write(lastBoundaryStringLineBytes, 0, lastBoundaryStringLineBytes.Length);
Logger.writeToLogFileCom("... finished, File closed");
} // end using
// Grab the response from the server. WebException will be thrown
// when a HTTP OK status is not returned
Logger.writeToLogFileCom("lese Response");
response = requestToServer.GetResponse();
StreamReader responseReader = new StreamReader(response.GetResponseStream());
string replyFromServer = responseReader.ReadToEnd();
response.Close();
if (Regex.Split(Regex.Split(replyFromServer, "content\\:RESPONSE\"\\>")[1], "\\</span\\>")[0].Equals("OK"))
{
return true;
}
else
{
return false;
}
}
catch (Exception ex)
{
Logger.writeToLogFileCom("Fehler im HTML Sender");
Logger.writeToLogFileCom(ex.Message);
Logger.writeToLogFileCom(ex.StackTrace);
}
finally
{
try
{
if (response != null)
{
response.Close();
}
}
catch (Exception ex) { }
}
return false;
}