CURL - Post Form Isssue ( sequel ) Post: 303029999

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Top Forums Web Development CURL - Post Form Isssue ( sequel ) Post 303029999 by Neo on Monday 4th of February 2019 10:27:25 AM

02-04-2019

Administrator

You really need direct access to the server log files to debug a web dev ops problem, including:

The PHP error log
The ability to write custom logging in your PHP scripts (using error_log() .for example)

The exact name of the PHP error log files is configured in the /etc/php/5.X/php.ini configuration for the server, depending on the version of PHP running.

When you have redirection issues, you also need access to your apache server logs. The exact name of the log files is configured in the apache2 configuration for the server.

Apache2 error log
Apache2 access log

You cannot debug a server-side PHP issue without access to the php error log.

For example, our server traffic here at unix.com is getting a lot more traffic lately. We just got hammered and mysqld started throwing errors. I checked the PHP error log and found the problem (too many connections) and immediately increased the limit.

Without access to the log files, we are blind.

You must team up with someone at your place of work who has system admin privs on the server to get you access to the logs.

curl() does not give any clues to what is happening on the server side (internally) except the HTTPD status code (like 302, 404, 301, etc). You should learn to use the web dev tools built into your browser for debugging web apps, not curl() and you must have access to the server logs directly. There is a networking tab in the web dev console which can help you

If you do not have access, the you should not be working on these kinds of problems at work. Either you have permissions (you are authorized) or you are not authorized. If you do not have system admin privs on the web server, you cannot debug the web app. It's that simple.

You cannot be a doctor if you do not have access to the patient. You cannot be a builder if you do not have access to the building. You cannot build and debug web apps without access to the web server.

Cheers.

Neo

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LEARN ABOUT MOJAVE

curl_easy_init

curl_easy_init(3)						  libcurl Manual						 curl_easy_init(3)

NAME

       curl_easy_init - Start a libcurl easy session

SYNOPSIS

       #include <curl/curl.h>

       CURL *curl_easy_init( );

DESCRIPTION

       This  function  must  be the first function to call, and it returns a CURL easy handle that you must use as input to other functions in the
       easy interface. This call MUST have a corresponding call to curl_easy_cleanup(3) when the operation is complete.

       If you did not already call curl_global_init(3), curl_easy_init(3) does it automatically.  This may  be	lethal	in  multi-threaded  cases,
       since curl_global_init(3) is not thread-safe, and it may result in resource problems because there is no corresponding cleanup.

       You  are  strongly advised to not allow this automatic behaviour, by calling curl_global_init(3) yourself properly.  See the description in
       libcurl(3) of global environment requirements for details of how to use this function.

RETURN VALUE

       If this function returns NULL, something went wrong and you cannot use the other curl functions.

EXAMPLE

       CURL *curl = curl_easy_init();
       if(curl) {
	 CURLcode res;
	 curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
	 res = curl_easy_perform(curl);
	 curl_easy_cleanup(curl);
       }

SEE ALSO

       curl_easy_cleanup(3), curl_global_init(3), curl_easy_reset(3), curl_easy_perform(3)

libcurl 7.54.0							 February 03, 2016						 curl_easy_init(3)

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