Jochem Maas wrote:
Adam Zey wrote:
PHP seems to cache POST data, and waits for the entire POST to finish
sending before it makes it available to php://input.
I'd like to be able to read the post data from php://input while the
client is still uploading it. How can I cause PHP to make the POST
data available right away instead of after the client finishes sending?
Regards, Adam Zey.
PS: As far as I can tell, PHP caches the entire POST in memory as it
is being sent, but just doesn't make it available to php://input until
after the client is done. Since PHP already has it in memory, why
isn't it accessible?
are you sure it's php that is holding it in memory? $_POST is fully filled
on the first line of the script which gives me the impression that the
webserver
is caching the response until it all been uploaded before even starting up
php.
or am I missing something here?
You're correct, of course. I was a bit confused, it seems.
PUT behaves as I described above. If you do a PUT request for the PHP
script directly, the PHP script is called right away, and any attempt to
fread from php://input blocks until either the client is done sending,
or some sort of buffer is filled (the fread occasionally returns with
lots of data if you keep sending).
So, might I amend my question to, is it possible to disable PHP
buffering PUTs, or Apache buffering POST? (Or is it PHP that just
buffers the POST before actually executing the script, but post Apache?)
Essentially what I want is a persistant HTTP connection over which I can
stream data and have the server-side PHP script process the data as it
arrives, rather than when all the data is sent.
The only other approach I can figure out is to send periodic POST
requests with the latest data, the downside of which is a huge increase
in latency between data production and consumption.
Regards, Adam Zey.
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