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dotnet remoting : MemoryStream??
I am working on an updater that Retrieves a file from a web page. GetRequest.Method = "POST" SW = New StreamWriter(TheRequest.GetRequestStream) SW.WriteLine(TransferName) SW.Close() TheResponse = TheRequest.GetResponse() ms = New MemoryStream() CopyData(TheResponse.GetResponseStream(), ms) ms.Seek(0, SeekOrigin.Begin) System.IO.Directory.CreateDirectory(TransferFolder) Dim st As FileStream = New FileStream(CompleteName, FileMode.Create) ms.WriteTo(st) st.Close() ms.Close() The application works good about 90% of the time I have noticed that when the file is really big like 25 Megs, it stops sending at about 16 Megs. Is this because the computer does not have enough memory to store the complete file? or could it be something with the web page that is responding to the request? or could it be something else. Any suggestions will be greatly appreciated and even modifications to my code above. I am not sure how to make the memory stream write to the file every Meg to test the theory. Thanks, Chuck
I receive the following Error Message.
unable to read data from transport connection Thanks, Chuck [quoted text, click to view] "Charles A. Lackman" <Charles@CreateItSoftware.net> wrote in message news:OqlZ0o6DFHA.2572@tk2msftngp13.phx.gbl... > Hello, > > I am working on an updater that Retrieves a file from a web page. > > > GetRequest.Method = "POST" > > SW = New StreamWriter(TheRequest.GetRequestStream) > SW.WriteLine(TransferName) > SW.Close() > TheResponse = TheRequest.GetResponse() > ms = New MemoryStream() > CopyData(TheResponse.GetResponseStream(), ms) > ms.Seek(0, SeekOrigin.Begin) > System.IO.Directory.CreateDirectory(TransferFolder) > Dim st As FileStream = New FileStream(CompleteName, FileMode.Create) > ms.WriteTo(st) > st.Close() > ms.Close() > > The application works good about 90% of the time I have noticed that when > the file is really big like 25 Megs, it stops sending at about 16 Megs. > Is this because the computer does not have enough memory to store the > complete file? or could it be something with the web page that is > responding to the request? or could it be something else. > > Any suggestions will be greatly appreciated and even modifications to my > code above. I am not sure how to make the memory stream write to the file > every Meg to test the theory. > > Thanks, > Chuck >
For one, if your intent is to store it in a file and never use it in memory
then you simply need to put it into the file stream directly. I would recommend using a buffered loop to stream the file data from the response stream to the file stream until there is no more data. c# but easily translated and maybe this is what copy data is?: FileStream fos = new FileStream(Name, FileMode.Create); byte[] buf = new byte[4096]; int bytes = 0; while((bytes = TheResponse.Read(buf, 0, 4096)) > 0) { fos.Write(buf, 0, bytes); } fos.close(); TheResponse.close(); Do you get any exceptions for the failure? Could it be a timeout that you are experiencing? Fred [quoted text, click to view] "Charles A. Lackman" <Charles@CreateItSoftware.net> wrote in message news:OqlZ0o6DFHA.2572@tk2msftngp13.phx.gbl... > Hello, > > I am working on an updater that Retrieves a file from a web page. > > > GetRequest.Method = "POST" > > SW = New StreamWriter(TheRequest.GetRequestStream) > SW.WriteLine(TransferName) > SW.Close() > TheResponse = TheRequest.GetResponse() > ms = New MemoryStream() > CopyData(TheResponse.GetResponseStream(), ms) > ms.Seek(0, SeekOrigin.Begin) > System.IO.Directory.CreateDirectory(TransferFolder) > Dim st As FileStream = New FileStream(CompleteName, FileMode.Create) > ms.WriteTo(st) > st.Close() > ms.Close() > > The application works good about 90% of the time I have noticed that when > the file is really big like 25 Megs, it stops sending at about 16 Megs. Is > this because the computer does not have enough memory to store the complete > file? or could it be something with the web page that is responding to the > request? or could it be something else. > > Any suggestions will be greatly appreciated and even modifications to my > code above. I am not sure how to make the memory stream write to the file > every Meg to test the theory. > > Thanks, > Chuck > >
Hello,
I have rewritten the stream directly to a file and still get the same error (Freeze). I also changed the Session timeout on my server to last longer (still same problem). Hmmm?? The Error I get is: unable to read data from transport connection Code For CopyData: Private Sub CopyData(ByVal FromStream As Stream, ByVal ToStream As Stream) Dim intBytesRead As Integer Dim Counter As Integer = 0 Const intSize As Integer = 1024 Dim bytes(intSize) As Byte ProgressBar1.Step = 1024 intBytesRead = FromStream.Read(bytes, 0, intSize) While intBytesRead > 0 ToStream.Write(bytes, 0, intBytesRead) intBytesRead = FromStream.Read(bytes, 0, intSize) end Sub Chuck [quoted text, click to view] "Fred Hirschfeld" <a@b.c> wrote in message news:u5UgEZEEFHA.1012@TK2MSFTNGP14.phx.gbl... > For one, if your intent is to store it in a file and never use it in > memory > then you simply need to put it into the file stream directly. I would > recommend using a buffered loop to stream the file data from the response > stream to the file stream until there is no more data. > > c# but easily translated and maybe this is what copy data is?: > FileStream fos = new FileStream(Name, FileMode.Create); > byte[] buf = new byte[4096]; > int bytes = 0; > while((bytes = TheResponse.Read(buf, 0, 4096)) > 0) { > fos.Write(buf, 0, bytes); > } > fos.close(); > TheResponse.close(); > > Do you get any exceptions for the failure? Could it be a timeout that you > are experiencing? > > Fred > > "Charles A. Lackman" <Charles@CreateItSoftware.net> wrote in message > news:OqlZ0o6DFHA.2572@tk2msftngp13.phx.gbl... >> Hello, >> >> I am working on an updater that Retrieves a file from a web page. >> >> >> GetRequest.Method = "POST" >> >> SW = New StreamWriter(TheRequest.GetRequestStream) >> SW.WriteLine(TransferName) >> SW.Close() >> TheResponse = TheRequest.GetResponse() >> ms = New MemoryStream() >> CopyData(TheResponse.GetResponseStream(), ms) >> ms.Seek(0, SeekOrigin.Begin) >> System.IO.Directory.CreateDirectory(TransferFolder) >> Dim st As FileStream = New FileStream(CompleteName, FileMode.Create) >> ms.WriteTo(st) >> st.Close() >> ms.Close() >> >> The application works good about 90% of the time I have noticed that when >> the file is really big like 25 Megs, it stops sending at about 16 Megs. > Is >> this because the computer does not have enough memory to store the > complete >> file? or could it be something with the web page that is responding to >> the >> request? or could it be something else. >> >> Any suggestions will be greatly appreciated and even modifications to my >> code above. I am not sure how to make the memory stream write to the >> file >> every Meg to test the theory. >> >> Thanks, >> Chuck >> >> > >
NOTE:
I am grabbing 4 files, three of which are under 10 megs. The larger file of 26 megs the third file to download. All the other files download just fine. It's just the file that is over 15 Megs is size. Chuck [quoted text, click to view] "Fred Hirschfeld" <a@b.c> wrote in message news:u5UgEZEEFHA.1012@TK2MSFTNGP14.phx.gbl... > For one, if your intent is to store it in a file and never use it in > memory > then you simply need to put it into the file stream directly. I would > recommend using a buffered loop to stream the file data from the response > stream to the file stream until there is no more data. > > c# but easily translated and maybe this is what copy data is?: > FileStream fos = new FileStream(Name, FileMode.Create); > byte[] buf = new byte[4096]; > int bytes = 0; > while((bytes = TheResponse.Read(buf, 0, 4096)) > 0) { > fos.Write(buf, 0, bytes); > } > fos.close(); > TheResponse.close(); > > Do you get any exceptions for the failure? Could it be a timeout that you > are experiencing? > > Fred > > "Charles A. Lackman" <Charles@CreateItSoftware.net> wrote in message > news:OqlZ0o6DFHA.2572@tk2msftngp13.phx.gbl... >> Hello, >> >> I am working on an updater that Retrieves a file from a web page. >> >> >> GetRequest.Method = "POST" >> >> SW = New StreamWriter(TheRequest.GetRequestStream) >> SW.WriteLine(TransferName) >> SW.Close() >> TheResponse = TheRequest.GetResponse() >> ms = New MemoryStream() >> CopyData(TheResponse.GetResponseStream(), ms) >> ms.Seek(0, SeekOrigin.Begin) >> System.IO.Directory.CreateDirectory(TransferFolder) >> Dim st As FileStream = New FileStream(CompleteName, FileMode.Create) >> ms.WriteTo(st) >> st.Close() >> ms.Close() >> >> The application works good about 90% of the time I have noticed that when >> the file is really big like 25 Megs, it stops sending at about 16 Megs. > Is >> this because the computer does not have enough memory to store the > complete >> file? or could it be something with the web page that is responding to >> the >> request? or could it be something else. >> >> Any suggestions will be greatly appreciated and even modifications to my >> code above. I am not sure how to make the memory stream write to the >> file >> every Meg to test the theory. >> >> Thanks, >> Chuck >> >> > >
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