Setting Curl s Timeout in PHP

Question

I m running a curl request on an eXist database through php  The dataset is very large  and as a result  the database consistently takes a long amount of time to return an XML response  To fix that  we set up a curl request  with what is supposed to be a long timeout    ch   curl init     headers  Content-Length     strlen  postString    headers  User-Agent      Curl 1 0    curl setopt  ch  CURLOPT URL   requestUrl   curl setopt  ch  CURLOPT HEADER  false   curl setopt  ch  CURLOPT HTTPHEADER   headers   curl setopt  ch  CURLOPT RETURNTRANSFER  true   curl setopt  ch  CURLOPT USERPWD   admin     curl setopt  ch CURLOPT TIMEOUT 1000    response   curl exec  ch   curl close  ch     However  the curl request consistently ends before the request is completed   lt 1000 when requested via a browser   Does anyone know if this is the proper way to set timeouts in curl

User · Answer

Hmm  it looks to me like CURLOPT TIMEOUT defines the amount of time that any cURL function is allowed to take to execute  I think you should actually be looking at CURLOPT CONNECTTIMEOUT instead  since that tells cURL the maximum amount of time to wait for the connection to complete

User · Answer

You can t run the request from a browser  it will timeout waiting for the server running the CURL request to respond  The browser is probably timing out in 1-2 minutes  the default network timeout   You need to run it from the command line terminal

User · Answer

Your code sets the timeout to 1000 seconds  For milliseconds  use CURLOPT TIMEOUT MS

User · Answer

See documentation  http   www php net manual en function curl-setopt php  CURLOPT CONNECTTIMEOUT - The number of seconds to wait while trying to connect  Use 0 to wait indefinitely  CURLOPT TIMEOUT - The maximum number of seconds to allow cURL functions to execute   curl setopt  ch  CURLOPT CONNECTTIMEOUT  0    curl setopt  ch  CURLOPT TIMEOUT  400     timeout in seconds   also don t forget to enlarge time execution of php script self   set time limit 0     to infinity for example

User · Answer

There is a quirk with this that might be relevant for some people     From the PHP docs comments   If you want cURL to timeout in less than one second  you can use CURLOPT TIMEOUT MS  although there is a bug  quot feature quot   on  quot Unix-like systems quot  that causes libcurl to timeout immediately if the value is  lt  1000 ms with the error  quot cURL Error  28   Timeout was reached quot    The explanation for this behavior is   quot If libcurl is built to use the standard system name resolver  that portion of the transfer will still use full-second resolution for timeouts with a minimum timeout allowed of one second  quot  What this means to PHP developers is  quot You can t use this function without testing it first  because you can t tell if libcurl is using the standard system name resolver  but you can be pretty sure it is  quot  The problem is that on  Li U nix  when libcurl uses the standard name resolver  a SIGALRM is raised during name resolution which libcurl thinks is the timeout alarm  The solution is to disable signals using CURLOPT NOSIGNAL   Here s an example script that requests itself causing a 10-second delay so you can test timeouts   if   isset   GET  foo              Client      ch   curl init  http   localhost test test timeout php foo bar        curl setopt  ch  CURLOPT RETURNTRANSFER  true       curl setopt  ch  CURLOPT NOSIGNAL  1       curl setopt  ch  CURLOPT TIMEOUT MS  200        data   curl exec  ch        curl errno   curl errno  ch        curl error   curl error  ch       curl close  ch        if   curl errno  gt  0            echo  quot cURL Error   curl errno    curl error n quot         else           echo  quot Data received   data n quot           else          Server     sleep 10       echo  quot Done  quot      From http   www php net manual en function curl-setopt php 104597

User · Answer

You will need to make sure about timeouts between you and the file  In this case PHP and Curl   To tell Curl to never timeout when a transfer is still active  you need to set CURLOPT TIMEOUT to 0  instead of 1000   curl setopt  ch  CURLOPT TIMEOUT  0       In PHP  again  you must remove time limits or PHP it self  after 30 seconds by default  will kill the script along Curl s request  This alone should fix your issue  In addition  if you require data integrity  you could add a layer of security by using ignore user abort     The maximum execution time  in seconds  If set to zero  no time limit is imposed  set time limit 0      Make sure to keep alive the script when a client disconnect  ignore user abort true     A client disconnection will interrupt the execution of the script and possibly damaging data  eg  non-transitional database query  building a config file  ecc   while in your case it would download a partial file    and you might  or not  care about this   Answering this old question because this thread is at the top on engine searches for CURL TIMEOUT

User · Answer

If you are using PHP as a fastCGI application then make sure you check the fastCGI timeout settings  See  PHP curl put 500 error

[php] Setting Curl's Timeout in PHP

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