Python CGI checklist - Revision history

Michael Murtaugh: Michael Murtaugh moved page CGI checklist to Python CGI checklist over redirect

2014-02-12T09:34:16Z

Michael Murtaugh moved page CGI checklist to Python CGI checklist over redirect

← Older revision	Revision as of 11:34, 12 February 2014
(No difference)

2014-02-12T09:33:55Z

Make sure you're view the script through HTTP / a web server

← Older revision		Revision as of 11:33, 12 February 2014
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	== Troubleshooting ==		== Troubleshooting ==
	=== Make sure you~~'re view~~ the script through HTTP / a web server ===		=== Make sure you are viewing the script through HTTP / a web server (and not as a local file) ===

	~~If you~~'~~re seeing~~ the ~~actual source code of~~ the ~~script~~, ~~you need to~~ make sure ~~that~~ you ~~are viewing~~ the script via a webserver (~~not just opening~~ the script ~~directly as a file~~). In ~~other words,~~ the URL should start with "http:" not "file:".		It's the web server that actually performs a CGI script -- not the browser, so make sure you're looking at the script ''via a webserver'' rather than directly opening the script in your browser. (This would be one reason you might be seeing the raw source code of the script rather than it's output). In any case the URL (in the browser) should start with "http:" not "file:".

	http://localhost/cgi-bin/script.cgi		http://localhost/cgi-bin/script.cgi
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	file:///this/can't/be/right/script.cgi		file:///this/can't/be/right/script.cgi

	~~And if this doesn't work, make sure your webserver is running (Debian: /etc/init~~.~~d/apache2 restart... Mac OS X: System Preferences, Sharing, Personal Web Sharing should be switched~~ on).		See [[Serve.py]] for a tip on how to run a simple local CGI-capable webserver with a simple python command.

	=== Display python errors in the browser ===		=== Display python errors in the browser ===

2014-02-12T09:31:01Z

Print the Content-type

← Older revision		Revision as of 11:31, 12 February 2014
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	chmod 755 myscript.cgi		chmod 755 myscript.cgi

	== Print the Content-type ==		== Print the Content-type first! ==

	The '''first output''' of your script must be the "HTTP headers", which at the very least should be a Content-type (with optional character set) '''followed by a blank line''' (which terminates the headers section). After that, all output is considered the "contents" of the document.		The '''first output''' of your script must be the "HTTP headers", which at the very least should be a Content-type (with optional character set) '''followed by a blank line''' (which terminates the headers section). After that, all output is considered the "contents" of the document.

2013-11-26T14:59:04Z

← Older revision	Revision as of 16:59, 26 November 2013
(No difference)

2013-05-21T11:15:06Z

Check the webserver's error log

← Older revision		Revision as of 13:15, 21 May 2013
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	Use a shell on the server machine (so ssh to pzwart if that's where you're running) and:		Use a shell on the server machine (so ssh to pzwart if that's where you're running) and:

	tail /var/log/apache2/~~error_log~~		tail /var/log/apache2/error.log

2013-05-13T10:44:49Z

Make sure you're view the script through HTTP / a web server

← Older revision		Revision as of 12:44, 13 May 2013
Line 51:		Line 51:
	file:///this/can't/be/right/script.cgi		file:///this/can't/be/right/script.cgi

	And if this doesn't work, make sure your webserver is running (Mac OS X: System Preferences, Sharing, Personal Web Sharing should be switched on).		And if this doesn't work, make sure your webserver is running (Debian: /etc/init.d/apache2 restart... Mac OS X: System Preferences, Sharing, Personal Web Sharing should be switched on).

	=== Display python errors in the browser ===		=== Display python errors in the browser ===

2013-05-13T10:44:12Z

Check the webserver's error log

2013-05-13T10:43:20Z

Check the webserver's error log

← Older revision		Revision as of 12:43, 13 May 2013
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	=== Check the webserver's error log ===		=== Check the webserver's error log ===

			Use a shell on the server machine (so ssh to pzwart if that's where you're running) and:

	tail /var/log/apache2/error_log		tail /var/log/apache2/error_log

2013-05-13T10:42:25Z

← Older revision	Revision as of 12:42, 13 May 2013
(No difference)

2013-05-13T10:41:47Z

Print the Content-type

← Older revision		Revision as of 12:41, 13 May 2013
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	== Print the Content-type ==		== Print the Content-type ==

	The ~~very~~ '''first output'''' of your script must be the "HTTP headers", which at the very least should be a Content-type (with optional character set) '''followed by a blank line''' (which terminates the headers section). After that, all output is considered the "contents" of the document.		The '''first output''' of your script must be the "HTTP headers", which at the very least should be a Content-type (with optional character set) '''followed by a blank line''' (which terminates the headers section). After that, all output is considered the "contents" of the document.

	<source lang="python">		<source lang="python">