I think that was the issue, I changed the code to this, based of that
link you sent and your recomendation. It seems to not error.
private string getData(string url, Boolean postData, String xmlData)
{
String responseFromServer=string.Empty;
try
{
// Create a request using a URL that can receive a post.
WebRequest request = WebRequest.Create(url);
if (postData)
{
// Set the Method property of the request to POST.
request.Method = "POST";
// Create POST data and convert it to a byte array.
byte[] byteArray = Encoding.ASCII.GetBytes(xmlData);
// Set the ContentType property of the WebRequest.
request.ContentType = "text/plain";
// Set the ContentLength property of the WebRequest.
request.ContentLength = byteArray.Length;
// Get the request stream.
using (Stream dataStream =
request.GetRequestStream())
{
dataStream.Write(byteArray, 0,
byteArray.Length);
}
}
// Get the response.
using (WebResponse response = request.GetResponse())
{
Console.WriteLine(((HttpWebResponse)response).StatusDescription);
// Get the stream containing content returned by the
server.
using (Stream responseStream =
response.GetResponseStream())
{
using (StreamReader reader = new
StreamReader(responseStream))
{
responseFromServer = reader.ReadToEnd();
}
}
}
}
catch (Exception ex)
{
System.Diagnostics.StackTrace stackTrace = new
System.Diagnostics.StackTrace();
String method = stackTrace.GetFrame(0).GetMethod().Name;
log.writeLogInfo("ERROR " + method + ":", ex.Message +
"\n" + ex.StackTrace.ToString());
}
return responseFromServer;
}
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Jonathan Pryor
Sent: Thursday, August 04, 2011 5:06 PM
To: Discussions related to Mono for Android
Subject: Re: [mono-android] Program stops
On Aug 4, 2011, at 4:29 PM, Tim Kelly wrote:
> However, on another note. One of the things I took out of the proof
was a HttpWebRequest and HttpWebResponse which hit the server. So, I'm
adding more logging and have found one thing.
>
> Repeatedly calling these cause the network to stop functioning until
you reboot the emulator. Calling the equivalent in java posses no
issues.
I'm reminded of https://bugzilla.novell.com/show_bug.cgi?id=648862#c9
However, I see that you are disposing of `response` and other Stream
instances, so I'm not sure where the leak is coming from. That said, you
have lots of catch{} blocks; are those being hit? I ask because there
are code paths where, if an exception were thrown, the stream wouldn't
be closed:
Stream dataStream = request.GetRequestStream();
// Write the data to the request stream.
dataStream.Write(byteArray, 0, byteArray.Length);
// Close the Stream object.
dataStream.Close();
Instead, try:
using (Stream dataStream = request.GetRequestStream())
dataStream.WRite (byteArray, 0, byteArray.Length);
I would actually suggest using `using` more often, as I found that
method hard to read (but that may be just me), e.g. a simple translation
would be:
private string GetData(string url, Boolean postData, String
xmlData)
{
StringBuilder sb = new StringBuilder();
try {
using (var request = (HttpWebRequest)
WebRequest.Create(url)) {
request.ContentType = "text/plain";
if (postData) {
request.Method = "POST";
byte[] data =
Encoding.ASCII.GetBytes(xmlData);
request.ContentLength =
data.Length;
using (o =
request.GetRequestStream())
o.Write (data, 0,
data.Length);
}
using (var response = (HttpWebResponse)
request.GetReponse())
using (var resStream =
response.GetResponseStream ()) {
byte[] buf = new byte[4 * 1024];
int count = 0;
do {
count = resStream.Read
(buf, 0, buf.Length);
if (count != 0)
sb.Append
(Encoding.ASCII.GetString(buf, 0, count));
} while (count > 0);
}
}
} catch {}
return sb.ToString ();
}
- Jon
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