Error In Cgi
Contents |
Configuring Apache to permit CGI Writing a CGI program But
Cgi Error Http Headers
it's still not working! What's going on behind the scenes? CGI cgi error the specified cgi application misbehaved modules/libraries For more information See alsoComments Introduction Related ModulesRelated Directivesmod_aliasmod_cgimod_cgidAddHandlerOptions href="../mod/mod_alias.html#scriptalias">ScriptAliasHow To Fix Cgi Error
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Cgi Error 500
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Cgi Error Ah01215
tech support • Easy setup (we can even do it for you!) 500 Internal Server Error ...and how to fix it. The short answer: this is usually a permissions http://httpd.apache.org/docs/current/howto/cgi.html error on your CGI script, which is easy to fix. Go to your FTP client, or your website file manager, and highlight or right-click on the CGI script. Then choose Properties, or Permissions, or "Chmod", and set it to world-executable: that's 0755, or a+rx, or -rwxr-xr-x. Do NOT use 0777 (a+rwx or -rwxrwxrwx). And your cgi-bin directory itself should also https://encodable.com/internal_server_error/ be 0755, not 0777. The long answer: when running a Perl CGI script like FileChucker or UserBase, you may see the "Internal Server Error" message in your browser. The message will usually also say something like "please check the server's error-log for more information." You should do that -- the message printed to the error log will often tell you exactly what the problem is. The Apache error log, for example, is often located at /var/log/apache/error_log or /var/log/apache2/error_log (or sometimes "error.log"). If you don't have access to the error log, the next simplest thing to do is to make a backup copy of the script, then open the original and delete all of its contents, and add just these 3 lines to the file: #!/usr/bin/perl print "Content-type: text/plain\n\n"; print "testing...\n"; (Note: if the server is a Windows system, then replace the first line above with either #!perl or #!c:\path\to\perl.exe.) Now try to access the page in your browser again. If it works (you see "testing..." as its output) then you know that your server is at
a valid response for the client -- generally a 500 Internal Server Error message. Your CGI has the option of displaying full or partial headers. By default, CGI scripts should return only http://docstore.mik.ua/orelly/linux/cgi/ch03_03.htm partial headers. 3.3.1. Partial Headers CGI scripts must output one of the following three headers: A Content-type header specifying the media type of the content that will followA Location header specifying a URL to redirect the client toA Status header with a status that does not require additional data, such as 204 No Response Let's review each of these options. 3.3.1.1. Outputting documents The most common response for CGI scripts is to return HTML. cgi error A script must indicate to the server the media type of content it is returning prior to outputting any content. This is why all of the CGI scripts you have seen in the previous examples contained the following line: print "Content-type: text/html\n\n"; You can send other HTTP headers from a CGI script, but this header field is the minimum necessary in order to output a document. HTML documents are by no means the only error in cgi form of media type that may be outputted by CGI scripts. By specifying a different media type, you can output any type of document that you can imagine. For example, Example 3-4 later in this chapter shows how to return a dynamic image. The two newlines at the end the Content-type header tell the web server that this is the last header line and that subsequent lines are part of the body of the message. This correlates to the extra CRLF that we discussed in the last chapter, which separates HTTP headers from the content body (see the upcoming sidebar, the sidebar "Line Endings"). Line Endings Many operating systems use different combinations of line feeds and carriage returns to represent the end of a line of text. Unix systems use a line feed; Macintosh systems use a carriage return; and Microsoft systems use both a carriage return and a line feed, often abbreviated as CRLF. HTTP headers require a CRLF as well -- each header line must end with a carriage return and a line feed. In Perl (on Unix), a line feed is represented as "\n", and a carriage return is represented as "\r". Thus, you may wonder why our previous examples have included this: print "Content-type: text/html\n\n"; and not this: print "Content-type: text/html\r\n\r\n"; The second format would work, but