How to convert a non-seekable Stream to Byte Array?

[Hardy Wang]

Hi all:
The Stream object from WebRequest.GetResponseStream() is non-seekable.
How can I convert this stream to a byte array?

For ordinary Stream (seekable), I can use StreamObject.Read(myByteArray,
0, myLength)

[Aravind C]

Hi Hardy,

Since the response stream from a web request is a network stream
that does not provide random access (non-seekable), you will need to
copy the response stream to a seekable stream such as a MemoryStream
before you can perform seek operations:

Stream responseStream = webResponse.GetResponseStream();
MemoryStream memStream = new MemoryStream();

byte [] respBuffer = new byte[1024];
try
{
int bytesRead = responseStream.Read(respbuffer,0,
respBuffer.Length);
if(bytesRead > 0)
{
memStream.Write(respBuffer,0,bytesRead);
bytesRead = responseStream.Read(respBuffer,0,
respBuffer.Length);
}
}
finally
{
responseStream.Close();
webResponse.Close();
}

To get the array containing the byte data from the MemoryStream, use the
MemoryStream.GetBuffer() method.

Regards,
Aravind C

Post by Hardy Wang
The Stream object from WebRequest.GetResponseStream() is non-seekable.
How can I convert this stream to a byte array?
For ordinary Stream (seekable), I can use

StreamObject.Read(myByteArray,

Post by Hardy Wang
0, myLength)
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ICQ: 3359839
yours Hardy

[Hardy Wang]

I tried responseStream.Read(respbuffer,0, respBuffer.Length);

At this point an exception was thrown.

Post by Aravind C
Hi Hardy,
Since the response stream from a web request is a network stream
that does not provide random access (non-seekable), you will need to
copy the response stream to a seekable stream such as a MemoryStream
Stream responseStream = webResponse.GetResponseStream();
MemoryStream memStream = new MemoryStream();
byte [] respBuffer = new byte[1024];
try
{
int bytesRead = responseStream.Read(respbuffer,0,
respBuffer.Length);
if(bytesRead > 0)
{
memStream.Write(respBuffer,0,bytesRead);
bytesRead = responseStream.Read(respBuffer,0,
respBuffer.Length);
}
}
finally
{
responseStream.Close();
webResponse.Close();
}
To get the array containing the byte data from the MemoryStream, use the
MemoryStream.GetBuffer() method.
Regards,
Aravind C

Post by Hardy Wang
The Stream object from WebRequest.GetResponseStream() is

non-seekable.

Post by Aravind C

Post by Hardy Wang
How can I convert this stream to a byte array?
For ordinary Stream (seekable), I can use

StreamObject.Read(myByteArray,

Post by Hardy Wang
0, myLength)
--
WWW: http://hardywang.1accesshost.com
ICQ: 3359839
yours Hardy

[Jon Skeet [C# MVP]]

Post by Hardy Wang
I tried responseStream.Read(respbuffer,0, respBuffer.Length);
At this point an exception was thrown.

And what was the exception?

[Hardy Wang]

Just like something "the stream is not seakable"

Post by Jon Skeet [C# MVP]

Post by Hardy Wang
I tried responseStream.Read(respbuffer,0, respBuffer.Length);
At this point an exception was thrown.

And what was the exception?
--
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Jon Skeet [C# MVP]]

Post by Hardy Wang
Just like something "the stream is not seakable"

"Something like" doesn't help much. Could you post a short but
*complete* sample which demonstrates the problem? There should be no
problem just reading from the stream, if you're not actually *trying*
to seek.

[Jon Skeet [C# MVP]]

Post by Hardy Wang
The Stream object from WebRequest.GetResponseStream() is non-seekable.
How can I convert this stream to a byte array?
For ordinary Stream (seekable), I can use StreamObject.Read(myByteArray,
0, myLength)

You can use that with a non-seekable request too. However, in both
cases you shouldn't ignore the return value - it may well be that you
can't read the whole of the data in one chunk. You should loop until
either you've read everything you need to or you've got to the end of
the stream (where Read will return -1).