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SID-02336: Fresh install of TWiki-6.0.2 problem with CSS, images

Status: Asked Asked TWiki version: 6.0.2 Perl version: 5.016003
Category: CategoryInstallation Server OS: CentOS Linux release 7.3.1611 (Core) Last update: 5 hours ago

Just TWiki-6.0.2, build 29687 by stumbling through the install guide, it was not easy. I don't think I'm smart enough.

The result is a TWiki that looks like it can't find its own CSS and images. It's all plain HTML-looking, with text in place of the buttons along the top. In fact, there is no graphics on the WebHome page at all.

-- TWiki Guest - 2017-10-13

Discussion and Answer

Should have said "Just installed TWiki-6.0.2, build 29687..."

-- TWiki Guest - 2017-10-13

See related question images not loading

-- Peter Thoeny - 2017-10-13

This symptom usually points to non-matching configurations between TWiki and the web server: Though the CSS files and images are TWiki's own, the web server is supposed to present them to the user without intervention TWiki software. Good news is that this usually easily fixed.

The best starting point to create the web server configuration is ApacheConfigGenerator (also recommended in the TWikiInstallationGuide).

  • If you've done so, then one pitfall is the file and directory permissions: CSS files and images reside in the pub directory (relative to TWiki's installation root), and the files and directories therein must be readable by the user id running Apache (in CentOS that would be apache). Don't just chmod -R 644 pub because the directories need to have their x bit set!
  • Another thing to check is the TWiki configuration: Check the settings for PubDir and PubUrlPath. PubDir should be the absolute path to the pub directory, whereas PubUrlPath is the path to the "URL space" of that directory. If your TWiki URL (config setting ScriptUrlPath) is somewhere/bin, then PubUrlPath should be somewhere/pub.

For "static" files like CSS and images, the web server's error log (at /var/log/apache2/error.log) should provide information where the web server has been looking for the files, and what went wrong.

-- Harald Jörg - 2017-10-13

Harald: Thanks for the information. Here's what I've discovered.

By using all defaults at installation: Everything is installed under /var/www/twiki All files and directories under /var/www/TWiki/pub are owned by apache:apache (including pub itself) All files under /var/www/TWiki/pub are rw-rw-r-- (readable by everyone) All directories under (and including) /var/www/TWiki/pub are rwxr-xr-x.

I haven't tried to generate a new web server config file using the ApacheConfigGenerator because I already had a config file that i thought was right (obviously, it isn't.)

I do not have a directory /var/log/apache2

xx.xx.134.102 is my workstation, xx.xx.132.187 is the CentOS box I'm trying to bring TWiki up on.

In /var/log/httpd/ I have a a file errorlog in which I see a lot of warnings, but filtering them out, I get one instance of [Fri Oct 13 12:05:21.232864 2017] [cgi:error] [pid 15621] [client xx.xx.134.102:17522] attempt to invoke directory as script: /var/www/twiki/bin/, referer: http://xx.xx.132.187/do/configure but this one happens a lot: [Fri Oct 13 11:47:56.826583 2017] [cgi:error] [pid 420] [client xx.xx.134.102:16938] script not found or unable to stat: /var/www/twiki/bin/TWiki, referer: http://xx.xx.132.187/do/view/

-- TWiki Guest - 2017-10-13

Information I gleaned from http://myserver/do/configure

My {ScriptUrlPath} is simply /do

{PubUrlPath} is /twiki/pub

{PubDir} is /var/www/twiki/pub

{TemplateDir} is /var/www/twiki/templates

{DataDir} is /var/www/twiki/data

{LocalesDir} is /var/www/twiki/locale

-- TWiki Guest - 2017-10-13

This is what my twiki.conf file looks like: <verbatim> BrowserMatchNoCase ^$ blockAccess

<IfModule mod_perl.c> # Mod_perl preloading PerlSwitches -T </IfModule>

ScriptAlias /do "/var/www/twiki/bin"

Alias /pub "/var/www/twiki/pub"

<Directory "/var/www/twiki/bin"> AllowOverride None Order Allow,Deny Allow from all Deny from env=blockAccess

Options ExecCGI FollowSymLinks SetHandler cgi-script

# Password file for TWiki users AuthUserFile /var/www/twiki/data/.htpasswd AuthName 'Enter your WikiName: (First name and last name, no space, no dots, capitalized, e.g. JohnSmith)' AuthType Basic

# File to return on access control error (e.g. wrong password) ErrorDocument 401 /do/view/TWiki/TWikiRegistration

</Directory>

<Directory "/var/www/twiki/pub"> Options None AllowOverride None Order Allow,Deny Allow from all Deny from env=blockAccess

# Disable execusion of PHP scripts php_admin_flag engine off

# This line will redefine the mime type for the most common types of scripts AddType text/plain .shtml .php .php3 .phtml .phtm .pl .py .cgi

</Directory> </verbatim>

-- TWiki Guest - 2017-10-13

<pre> BrowserMatchNoCase ^$ blockAccess

<IfModule mod_perl.c> # Mod_perl preloading PerlSwitches -T </IfModule>

ScriptAlias /do "/var/www/twiki/bin"

Alias /pub "/var/www/twiki/pub"

<Directory "/var/www/twiki/bin"> AllowOverride None Order Allow,Deny Allow from all Deny from env=blockAccess

Options ExecCGI FollowSymLinks SetHandler cgi-script

# Password file for TWiki users AuthUserFile /var/www/twiki/data/.htpasswd AuthName 'Enter your WikiName: (First name and last name, no space, no dots, capitalized, e.g. JohnSmith)' AuthType Basic

# File to return on access control error (e.g. wrong password) ErrorDocument 401 /do/view/TWiki/TWikiRegistration

</Directory>

<Directory "/var/www/twiki/pub"> Options None AllowOverride None Order Allow,Deny Allow from all Deny from env=blockAccess

# Disable execusion of PHP scripts php_admin_flag engine off

# This line will redefine the mime type for the most common types of scripts AddType text/plain .shtml .php .php3 .phtml .phtm .pl .py .cgi

</Directory> </pre>

-- TWiki Guest - 2017-10-13

I guess I don't know how to post code.

-- TWiki Guest - 2017-10-13

Sorry for the wrong name for the error log! I'm not familiar with CentOS and typed the Debian path without thinking. And don't worry about how to post code: Unfortunately, this is impossible using the "Add comment" form here. You can either just "edit" the page and then paste the stuff in <verbatim> blocks, or simply attach files instead of copypasting the contents. Anyway, it's good enough to spot some quirks:

  • I guess that mixing up twiki and TWiki in your file paths when reporting permissions did just happen while typing, and actually all your directories are lowercase. On Linux you can have both /var/www/TWiki/pub and /var/www/twiki/pub in your file system, which could cause a lot of confusion.
  • I guess the problem lies here:
    • In the web server config you have: Alias /pub "/var/www/twiki/pub"
    • In configure, you have: {PubUrlPath} is /twiki/pub. That should be: {PubUrlPath} is /pub ! The left hand side of the Alias directive is the same "URL space" which TWiki needs to use as PubUrlPath.

-- Harald Jörg - 2017-10-13

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SupportForm
Status Asked
Title Fresh install of TWiki-6.0.2 problem with CSS, images
SupportCategory CategoryInstallation
TWiki version 6.0.2
Server OS CentOS Linux release 7.3.1611 (Core)
Web server Apache/2.4.6
Perl version 5.016003
Browser & version Firefox
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Topic revision: r5 - 2017-10-13 - HaraldJoerg
 
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