On 3/4/06, Christian Biesinger <[EMAIL PROTECTED]> wrote:
> Jon Smirl wrote:
> > The header for the available() method says it will return
> > NS_BASE_STREAM_CLOSED but it doesn't seem to be doing that.
>
> It says it will return that if the stream is closed. It also says that
> it returns 0 if the stream if at EOF but not closed. You didn't close it
> presumably, so it's not closed.
>
> Hm, the documentation here doesn't seem to be so great...
>
> > And in my code it isn't returning
> > NS_BASE_STREAM_CLOSED, it just returns zero available and I loop.
>
> Sounds like a bug in your code :-) The docs say that 0 means EOF.
I was basing the code on this. With a zero for EOF you can't tell
whether their isn't data available or if the socket is closed. Zero at
EOF is fine, but it needs to return NS_BASE_STREAM_CLOSED for the
result value.
/**
* Determine number of bytes available in the stream. A non-blocking
* stream that does not yet have any data to read should return 0 bytes
* from this method (i.e., it must not throw the NS_BASE_STREAM_WOULD_BLOCK
* exception).
*
* In addition to the number of bytes available in the stream, this method
* also informs the caller of the current status of the stream. A stream
* that is closed will throw an exception when this method is called. That
* enables the caller to know the condition of the stream before attempting
* to read from it. If a stream is at end-of-file, but not closed, then
* this method should return 0 bytes available.
*
* @return number of bytes currently available in the stream, or
* PR_UINT32_MAX if the size of the stream exceeds PR_UINT32_MAX.
*
* @throws NS_BASE_STREAM_CLOSED if the stream is closed normally or at
* end-of-file
* @throws <other-error> if the stream is closed due to some error
* condition
*/
/* unsigned long available (); */
NS_IMETHOD Available(PRUint32 *_retval) = 0;
If I am using a low level input stream from
rv = aTransport->OpenInputStream(0, 0, 0, getter_AddRefs(instream));
Is there any way to peek at the data? If I can't peek at the data I
need to implement my own buffering. With a peek function I can leave
it in the stream buffer. I'm looking for the \n\n\ at the end of the
headers so that I can start header parsing.
--
Jon Smirl
[EMAIL PROTECTED]
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