#1: curl timeout vs socket timeout
Posted on 2008-01-28 22:56:35 by Ravi Menon
Hi,
We have two versions of client code, one using curl, and other one
using raw sockets via fsockopen(), and
we use the following code to set the i/o timeouts:
1) curl:
..
..
curl_setopt( $handle, CURLOPT_TIMEOUT, 1 );
..
..
$resp = curl_exec($handle)
2) sockets:
stream_set_timeout( $sock, 1);
Here we use frwrite() and fread() to send the request and read the
response respectively.
In (1), how is the timeout applied - is it:
a) timeout includes the entire curl_exec() call - the combined socket
write() ( to send the request ) and
the read() ( read the response ) calls.
or
b) timeout is independently applied to write() and read() end respectively.
Some of our tests seem to indicate it is (a).
In (2), I am assuming the stream timeout is applied at each i/o call
independently for fwrite() and fread() - I am pretty
much certain on this as this is how it would map to underlying C calls.....
It will be good to get a confirmation on our doubts.
Thanks,
Ravi
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#2: Re: curl timeout vs socket timeout
Posted on 2008-01-28 23:19:02 by List Manager
Ravi Menon wrote:
> Hi,
>
> We have two versions of client code, one using curl, and other one
> using raw sockets via fsockopen(), and
> we use the following code to set the i/o timeouts:
>
> 1) curl:
>
> .
> .
> curl_setopt( $handle, CURLOPT_TIMEOUT, 1 );
From the manual
CURLOPT_TIMEOUT
The maximum number of seconds to allow cURL functions to execute.
Notice: "functions", I would take this as the entire process.
> .
> .
> $resp = curl_exec($handle)
>
>
> 2) sockets:
>
> stream_set_timeout( $sock, 1);
From the manual
Set timeout period on a stream
This would tell me that it is on the entire process, not just one
function call like fwrite() or fread().
>
> Here we use frwrite() and fread() to send the request and read the
> response respectively.
>
>
> In (1), how is the timeout applied - is it:
>
> a) timeout includes the entire curl_exec() call - the combined socket
> write() ( to send the request ) and
> the read() ( read the response ) calls.
>
> or
True for both
>
> b) timeout is independently applied to write() and read() end respectively.
False for both
>
> Some of our tests seem to indicate it is (a).
>
>
> In (2), I am assuming the stream timeout is applied at each i/o call
> independently for fwrite() and fread() - I am pretty
> much certain on this as this is how it would map to underlying C calls.....
>
>
> It will be good to get a confirmation on our doubts.
>
> Thanks,
> Ravi
>
This is what I have experienced at least.
--
Jim Lucas
"Some men are born to greatness, some achieve greatness,
and some have greatness thrust upon them."
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by William Shakespeare
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#3: Re: curl timeout vs socket timeout
Posted on 2008-01-31 02:23:44 by Richard Lynch
On Mon, January 28, 2008 3:56 pm, Ravi Menon wrote:
> 1) curl:
>
> .
> .
> curl_setopt( $handle, CURLOPT_TIMEOUT, 1 );
> .
> .
> $resp = curl_exec($handle)
>
>
> 2) sockets:
>
> stream_set_timeout( $sock, 1);
This is only for AFTER you've already opened up the socket.
If you want a timeout on the opening, the setting is in php.ini, or
you can just use ini_set() right before the fsockopen.
> In (1), how is the timeout applied - is it:
>
> a) timeout includes the entire curl_exec() call - the combined socket
> write() ( to send the request ) and
> the read() ( read the response ) calls.
>
> or
>
> b) timeout is independently applied to write() and read() end
> respectively.
>
> Some of our tests seem to indicate it is (a).
You'd probably have to ask the cURL folks...
> In (2), I am assuming the stream timeout is applied at each i/o call
> independently for fwrite() and fread() - I am pretty
> much certain on this as this is how it would map to underlying C
> calls.....
Almost for sure, it applies to any given fwrite/fread.
Actually, probably at an even lower level, to any given packet
sent/received within an fwrite/fread
> It will be good to get a confirmation on our doubts.
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