Internal Server Error Perl Cgi
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of questions I get from my visitors at thesitewizard.com, I can see that one of the most dreaded errors that newcomers to CGI face is the "500 Internal Server Error". It is one of the internal server error cgi python most uninformative error messages that can mean anything from an improper upload to a apache cgi-bin 500 internal server error bug in the script. This article attempts to give you some concrete, practical steps that you can take to narrow down the internal server error cgi-bin apache problem and hopefully eliminate it. For the uninitiated, a "500 Internal Server Error" is a message much like the common "404 File Not Found" message. You get the latter message in your browser when you
Python Cgi 500 Internal Server Error
try to access a non-existent web page. You get the "500 Internal Server Error" message when you try to run a script with problems. For the purposes of this article, I am assuming that your CGI script is a Perl script, by far the most commonly available on the Internet. We will try to eliminate the most common errors first (and the easiest-to-eliminate ones): Location Did you upload your scripts cgi script 500 internal server error into the right place? This is not as obvious as it may seem. Some servers are configured to run your CGI scripts anywhere. Others will only run it when it is installed in a particular directory. It is not just a matter of creating a "cgi-bin" directory — for example, some hosts configure the server so that it will run scripts only from a particular directory outside the web directory structure (for security reasons). Your web page will still call the script "/cgi-bin/script.pl" but the server maps it to the actual directory. You will have to upload it in the right directory, regardless of what your web page calls it. Find out such information from your web host's documentation. File Upload Mode Did you upload your Perl script in ASCII mode? Your FTP client may have uploaded the script in binary mode if you did not take any special action. Perl scripts are ASCII files, and since different operating systems have different ways of representing the end of line character (eg Unix uses a line-feed, Windows uses a carriage-return and line-feed pair), it is important that you set the uploading method to ASCII, so that line-end translation is performed. Re-upload the script, this time making sure that it was uploaded
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developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a http://www.thesitewizard.com/archive/servererror.shtml community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Why does my Perl CGI script cause a 500 internal server error? up vote 3 down vote favorite I get a 500 internal server error when I try to run the code below http://stackoverflow.com/questions/2872040/why-does-my-perl-cgi-script-cause-a-500-internal-server-error in a web server which supports perl: #! /usr/bin/perl use LWP; my $ua = LWP::UserAgent->new; $ua->agent("TestApp/0.1 "); $ua->env_proxy(); my $req = HTTP::Request->new(POST => 'http://www.google.com/loc/json'); $req->content_type('application/jsonrequest'); $req->content('{ "cell_towers": [{"location_area_code": "55000", "mobile_network_code": "95", "cell_id": "20491", "mobile_country_code": "404"}], "version": "1.1.0", "request_address": "true"}'); my $res = $ua->request($req); if ($res->is_success) { print $res->content,"\n"; } else { print $res->status_line, "\n"; return undef; } But there is no error when I run the code below: #! /usr/bin/perl use CGI::Carp qw(fatalsToBrowser); print "Content-type: text/html\n\n"; print "\n"; print "
Hello World!
\n"; foreach $key (sort keys(%ENV)) { print "$key = $ENV{$key}
" ; } print "\n"; print "\n"; So I think there is some problem with my code. When I run the first perl script in my local machine with the -wc command, it says that the syntax is OK. Help me please. perl cgi share|improve this question edited May 21 '10 at 0:26 brian d foy 87.1k24150391 asked May 2
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in the script or the server's inability to understand it, and is not an error caused on your end. The error resides solely on the server that hosts the website. 500 error user troubleshooting Despite the issue being something you can't control or fix directly, there are a few things you can try to rectify the problem from your computer. Try reloading the web page (press F5) to see if the error can be cleared up. Try coming back to the web page at a later time. If you're not the webmaster, it's likely that they are working on the problem. Contact the webmaster by e-mail. Many web pages have a link on it to contact the company (support email) or the server hosted the page. In any case, just know that you did not cause the error and your computer or Internet connection are not at fault. 500 error webmaster troubleshooting If you are responsible for the script or page generating this error, below are steps that can be taken to help identify and fix this error with your script. Script is not set as executable All scripts uploaded to a server must have execute permissions (e.g. chmod 755 or -rwxr-xr-x). If you are uploading the file through a graphical FTP program such as FileZilla, right-click the file on the Server and click File permissions to see the permissions. File is not being uploaded as ASCII (Text) When uploading any Perl or PHP script file you need to make sure that the file is uploaded in ASCII (Text) mode and not Binary mode. If your program is uploading the files and mode is automatically be set, try switching to manual and make sure it is ASCII (Text) mode. Perl script doesn't have a shebang or content-Type If you are uploading a Perl script (files ending with .pl or .cgi,) it must have a shebang as the first line and a content-Type line before any print command. Below is what we recommend having at the top of all your Perl script file. Adding the fatalstobrowser line to our script will print any error to the browser window, which helps debug the script if there are errors in it. #!/usr/bin/perluse strict;use CGI::Carp qw( fatalsToBrowser carpout);print "Content-Type: text/html", "\n\n"; Not uploaded to the correct directory Make sure the script file is being uploaded to a directory that has executable permissions. In the case of Perl files, we suggest uploading all Perl files