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a4411 · #1 23rd July 2008, 00:56

I use CentOs 5.2, installed like "perfect server how-to". Yesterday I decided to use cgi script and found that they wan't run.

In terminal i run simple script "hello world"
./perl.pl
and it shows me "hello"

But when I try to run it from web browser, I receive 500 error.
In logfile is message "Premature end of script Headers".

I make that perl.pl by VI in terminal, did't upload or copy it.

Please, help me.

topdog · #2 23rd July 2008, 12:23

Am guessing that your script is not sending the corrent content type headers.

a4411 · #3 23rd July 2008, 13:52

Here is script:

Code:

#!/usr/bin/perl
print "Content-type: text/html\n\n";

print <<END_HTML;
<html>
<head></head>
<body>Hello, World!</body>
</html>
END_HTML

topdog · #4 23rd July 2008, 14:11

okay i thought u were not printing the content header, take a look at your httpd and audit logs, i suspect selinux could be blocking the action.

a4411 · #5 23rd July 2008, 14:23

Here is httpd.cong:

Code:

ServerTokens Major

/mod/mpm_common.html#lockfile>);

ServerRoot "/etc/httpd"


TraceEnable off


PidFile run/httpd.pid

TimeOut 120

KeepAlive on

MaxKeepAliveRequests 2500

KeepAliveTimeout 15


<IfModule prefork.c>
StartServers       10
MinSpareServers    20
MaxSpareServers   30
ServerLimit      512
MaxClients       512
MaxRequestsPerChild  2500
</IfModule>


Listen *:80

LoadModule auth_basic_module modules/mod_auth_basic.so
LoadModule auth_digest_module modules/mod_auth_digest.so
LoadModule authn_file_module modules/mod_authn_file.so
LoadModule authn_alias_module modules/mod_authn_alias.so
LoadModule authn_anon_module modules/mod_authn_anon.so
LoadModule authn_dbm_module modules/mod_authn_dbm.so
LoadModule authn_default_module modules/mod_authn_default.so
LoadModule authz_host_module modules/mod_authz_host.so
LoadModule authz_user_module modules/mod_authz_user.so
LoadModule authz_owner_module modules/mod_authz_owner.so
LoadModule authz_groupfile_module modules/mod_authz_groupfile.so
LoadModule authz_dbm_module modules/mod_authz_dbm.so
LoadModule authz_default_module modules/mod_authz_default.so
LoadModule ldap_module modules/mod_ldap.so
LoadModule authnz_ldap_module modules/mod_authnz_ldap.so
LoadModule include_module modules/mod_include.so
LoadModule log_config_module modules/mod_log_config.so
LoadModule logio_module modules/mod_logio.so
LoadModule env_module modules/mod_env.so
LoadModule ext_filter_module modules/mod_ext_filter.so
LoadModule mime_magic_module modules/mod_mime_magic.so
LoadModule expires_module modules/mod_expires.so
LoadModule deflate_module modules/mod_deflate.so
LoadModule headers_module modules/mod_headers.so
LoadModule usertrack_module modules/mod_usertrack.so
LoadModule setenvif_module modules/mod_setenvif.so
LoadModule mime_module modules/mod_mime.so
LoadModule dav_module modules/mod_dav.so
LoadModule status_module modules/mod_status.so
LoadModule autoindex_module modules/mod_autoindex.so
LoadModule info_module modules/mod_info.so
LoadModule dav_fs_module modules/mod_dav_fs.so
LoadModule vhost_alias_module modules/mod_vhost_alias.so
LoadModule negotiation_module modules/mod_negotiation.so
LoadModule dir_module modules/mod_dir.so
LoadModule actions_module modules/mod_actions.so
LoadModule speling_module modules/mod_speling.so
LoadModule userdir_module modules/mod_userdir.so
LoadModule alias_module modules/mod_alias.so
LoadModule rewrite_module modules/mod_rewrite.so
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
LoadModule proxy_ftp_module modules/mod_proxy_ftp.so
LoadModule proxy_http_module modules/mod_proxy_http.so
LoadModule proxy_connect_module modules/mod_proxy_connect.so
LoadModule cache_module modules/mod_cache.so
LoadModule suexec_module modules/mod_suexec.so
LoadModule disk_cache_module modules/mod_disk_cache.so
LoadModule file_cache_module modules/mod_file_cache.so
LoadModule mem_cache_module modules/mod_mem_cache.so
LoadModule cgi_module modules/mod_cgi.so


Include conf.d/*.conf


User apache
Group apache

UseCanonicalName off


DocumentRoot /var/www/html/megafolder

<Directory />
    Options Includes FollowSymLinks
    AllowOverride None
</Directory>



<IfModule mod_userdir.c>

</IfModule>


DirectoryIndex index.html index.html.var index.php

<Files ~ "^\.ht">
    Order allow,deny
    Deny from all
</Files>


TypesConfig /etc/mime.types


DefaultType text/plain


<IfModule mod_mime_magic.c>
#   MIMEMagicFile /usr/share/magic.mime
    MIMEMagicFile conf/magic
</IfModule>


HostNameLookups on

ErrorLog logs/error_log


LogLevel warn


LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
LogFormat "%h %l %u %t \"%r\" %>s %b" common
LogFormat "%{Referer}i -> %U" referer
LogFormat "%{User-agent}i" agent



CustomLog logs/access_log "combined"


ServerSignature On


Alias /icons/ "/var/www/icons/"

<Directory "/var/www/icons">
    Options Indexes MultiViews
    AllowOverride None
    Order allow,deny
    Allow from all
</Directory>


<IfModule mod_dav_fs.c>
    # Location of the WebDAV lock database.
    DAVLockDB /var/lib/dav/lockdb
</IfModule>

ScriptAlias /cgi-bin/ "/var/www/cgi-bin/"


<Directory "/var/www/cgi-bin">
    AllowOverride None
Options +ExecCGI
order allow,deny
allow from all
</Directory>

IndexOptions FancyIndexing VersionSort NameWidth=* HTMLTable


AddIconByEncoding (CMP,/icons/compressed.gif) x-compress x-gzip

AddIconByType (TXT,/icons/text.gif) text/*
AddIconByType (IMG,/icons/image2.gif) image/*
AddIconByType (SND,/icons/sound2.gif) audio/*
AddIconByType (VID,/icons/movie.gif) video/*

AddIcon /icons/binary.gif .bin .exe
AddIcon /icons/binhex.gif .hqx
AddIcon /icons/tar.gif .tar
AddIcon /icons/world2.gif .wrl .wrl.gz .vrml .vrm .iv
AddIcon /icons/compressed.gif .Z .z .tgz .gz .zip
AddIcon /icons/a.gif .ps .ai .eps
AddIcon /icons/layout.gif .html .shtml .htm .pdf
AddIcon /icons/text.gif .txt
AddIcon /icons/c.gif .c
AddIcon /icons/p.gif .pl .py
AddIcon /icons/f.gif .for
AddIcon /icons/dvi.gif .dvi
AddIcon /icons/uuencoded.gif .uu
AddIcon /icons/script.gif .conf .sh .shar .csh .ksh .tcl
AddIcon /icons/tex.gif .tex
AddIcon /icons/bomb.gif core

AddIcon /icons/back.gif ..
AddIcon /icons/hand.right.gif README
AddIcon /icons/folder.gif ^^DIRECTORY^^
AddIcon /icons/blank.gif ^^BLANKICON^^

DefaultIcon /icons/unknown.gif

 
ReadmeName README.html
HeaderName HEADER.html

IndexIgnore .??* *~ *# HEADER* README* RCS CVS *,v *,t


AddLanguage ca .ca
AddLanguage cs .cz .cs
AddLanguage da .dk
AddLanguage de .de
AddLanguage el .el
AddLanguage en .en
AddLanguage eo .eo
AddLanguage es .es
AddLanguage et .et
AddLanguage fr .fr
AddLanguage he .he
AddLanguage hr .hr
AddLanguage it .it
AddLanguage ja .ja
AddLanguage ko .ko
AddLanguage ltz .ltz
AddLanguage nl .nl
AddLanguage nn .nn
AddLanguage no .no
AddLanguage pl .po
AddLanguage pt .pt
AddLanguage pt-BR .pt-br
AddLanguage ru .ru
AddLanguage sv .sv
AddLanguage zh-CN .zh-cn
AddLanguage zh-TW .zh-tw


LanguagePriority en ru ca cs da de el eo es et fr he hr it ja ko ltz nl nn no pl pt pt-BR sv zh-CN zh-TW


ForceLanguagePriority Prefer Fallback


AddDefaultCharset windows-1251

AddType application/x-httpd-php .php .htm .html .phtml 

AddType application/x-compress .Z
AddType application/x-gzip .gz .tgz


AddHandler cgi-script .cgi .pl


AddHandler server-parsed .html .htm


AddHandler type-map var


AddType text/html .shtml .html
AddOutputFilter INCLUDES .shtml .html

ErrorDocument 404 /404.php


Alias /error/ "/var/www/error/"

<IfModule mod_negotiation.c>
<IfModule mod_include.c>
AddOutputFilter Includes .html

    <Directory "/var/www/error">
        AllowOverride None
        Options IncludesNoExec
        AddOutputFilter Includes html
        AddHandler type-map var
        Order allow,deny
        Allow from all
        LanguagePriority en es de fr
        ForceLanguagePriority Prefer Fallback
    </Directory>


</IfModule>
</IfModule>


BrowserMatch "Mozilla/2" nokeepalive
BrowserMatch "MSIE 4\.0b2;" nokeepalive downgrade-1.0 force-response-1.0
BrowserMatch "RealPlayer 4\.0" force-response-1.0
BrowserMatch "Java/1\.0" force-response-1.0
BrowserMatch "JDK/1\.0" force-response-1.0


BrowserMatch "Microsoft Data Access Internet Publishing Provider" redirect-carefully
BrowserMatch "MS FrontPage" redirect-carefully
BrowserMatch "^WebDrive" redirect-carefully
BrowserMatch "^WebDAVFS/1.[0123]" redirect-carefully
BrowserMatch "^gnome-vfs/1.0" redirect-carefully
BrowserMatch "^XML Spy" redirect-carefully
BrowserMatch "^Dreamweaver-WebDAV-SCM1" redirect-carefully
Options ExecCGI FollowSymLinks +Includes
NameVirtualHost x.x.x.x:80



<VirtualHost x.x.x.x:80>
DocumentRoot "/var/www/html/domain.com"
ServerName domain.com
ServerAlias www.domain.com
AddHandler cgi-script .cgi
<Directory "/var/www/html/domain.com">
    AllowOverride all
    allow from all
    Options +Indexes +FollowSymlinks
</Directory>

ScriptAlias /cgi-bin/ "/var/www/html/domain.com/cgi-bin/"
#ScriptAlias /cgi/ "/var/www/cgi-bin/"
<Directory "/var/www/html/domain.com/cgi-bin">
	AllowOverride None
	Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
	Order allow,deny
	Allow from all
</Directory>


ErrorLog logs/domain.com-error_log
XBitHack on
</VirtualHost>

RLimitCPU 80 90
RLimitMEM 3800 4800
RLimitNPROC 80 90
ScriptLog /var/log/cgiscript.log

Here is error in domain.com-error_log

Code:

Premature end of script headers: perl4.pl

Suexec.log is empty

topdog · #6 23rd July 2008, 14:26

For selinux check the file /var/log/audit/audit.log

topdog · #7 23rd July 2008, 14:29

Did you set executable permissions on the script ?

Code:

chmod +x script_name

a4411 · #8 23rd July 2008, 14:37

Quote:

For selinux check the file /var/log/audit/audit.log

There is nothing interesting here. Only cron and login info.

Quote:

chmod +x script_name

it did't help, for scripts i tryed 755, 777 750 and other chmods. Owner of script - apache apache

a4411 · #9 23rd July 2008, 20:11

24 hours later, problem WAS SOLVED!!!

The reason was next strings in apache config:

RLimitCPU 80 90
RLimitMEM 3800 4800
RLimitNPROC 80 90

As I commented it, all begin to works fine.

Can anyone explain me, why?

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