summaryrefslogtreecommitdiff
path: root/docs/manual/cgi_path.html.en
diff options
context:
space:
mode:
Diffstat (limited to 'docs/manual/cgi_path.html.en')
-rw-r--r--docs/manual/cgi_path.html.en93
1 files changed, 0 insertions, 93 deletions
diff --git a/docs/manual/cgi_path.html.en b/docs/manual/cgi_path.html.en
deleted file mode 100644
index 2b7bd963b1..0000000000
--- a/docs/manual/cgi_path.html.en
+++ /dev/null
@@ -1,93 +0,0 @@
-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
-<HTML><HEAD>
-<TITLE>PATH_INFO Changes in the CGI Environment</TITLE>
-</HEAD>
-
-<!-- Background white, links blue (unvisited), navy (visited), red (active) -->
-<BODY
- BGCOLOR="#FFFFFF"
- TEXT="#000000"
- LINK="#0000FF"
- VLINK="#000080"
- ALINK="#FF0000"
->
-<!--#include virtual="header.html" -->
-<H1 ALIGN="CENTER">PATH_INFO Changes in the CGI Environment</H1>
-
-<HR>
-
-<H2><A NAME="over">Overview</A></H2>
-
-<P>As implemented in Apache 1.1.1 and earlier versions, the method
-Apache used to create PATH_INFO in the CGI environment was
-counterintuitive, and could result in crashes in certain cases. In
-Apache 1.2 and beyond, this behavior has changed. Although this
-results in some compatibility problems with certain legacy CGI
-applications, the Apache 1.2 behavior is still compatible with the
-CGI/1.1 specification, and CGI scripts can be easily modified (<A
-HREF="#compat">see below</A>).
-
-<H2><A NAME="prob">The Problem</A></H2>
-
-<P>Apache 1.1.1 and earlier implemented the PATH_INFO and SCRIPT_NAME
-environment variables by looking at the filename, not the URL. While
-this resulted in the correct values in many cases, when the filesystem
-path was overloaded to contain path information, it could result in
-errant behavior. For example, if the following appeared in a config
-file:
-<PRE>
- Alias /cgi-ralph /usr/local/httpd/cgi-bin/user.cgi/ralph
-</PRE>
-<P>In this case, <CODE>user.cgi</CODE> is the CGI script, the "/ralph"
-is information to be passed onto the CGI. If this configuration was in
-place, and a request came for "<CODE>/cgi-ralph/script/</CODE>", the
-code would set PATH_INFO to "<CODE>/ralph/script</CODE>", and
-SCRIPT_NAME to "<CODE>/cgi-</CODE>". Obviously, the latter is
-incorrect. In certain cases, this could even cause the server to
-crash.</P>
-
-<H2><A NAME="solution">The Solution</A></H2>
-
-<P>Apache 1.2 and later now determine SCRIPT_NAME and PATH_INFO by
-looking directly at the URL, and determining how much of the URL is
-client-modifiable, and setting PATH_INFO to it. To use the above
-example, PATH_INFO would be set to "<CODE>/script</CODE>", and
-SCRIPT_NAME to "<CODE>/cgi-ralph</CODE>". This makes sense and results
-in no server behavior problems. It also permits the script to be
-guaranteed that
-"<CODE>http://$SERVER_NAME:$SERVER_PORT$SCRIPT_NAME$PATH_INFO</CODE>"
-will always be an accessible URL that points to the current script,
-something which was not necessarily true with previous versions of
-Apache.
-
-<P>However, the "<CODE>/ralph</CODE>"
-information from the <CODE>Alias</CODE> directive is lost. This is
-unfortunate, but we feel that using the filesystem to pass along this
-sort of information is not a recommended method, and a script making
-use of it "deserves" not to work. Apache 1.2b3 and later, however, do
-provide <A HREF="#compat">a workaround.</A>
-
-<H2><A NAME="compat">Compatibility with Previous Servers</A></H2>
-
-<P>It may be necessary for a script that was designed for earlier
-versions of Apache or other servers to need the information that the
-old PATH_INFO variable provided. For this purpose, Apache 1.2 (1.2b3
-and later) sets an additional variable, FILEPATH_INFO. This
-environment variable contains the value that PATH_INFO would have had
-with Apache 1.1.1.</P>
-
-<P>A script that wishes to work with both Apache 1.2 and earlier
-versions can simply test for the existence of FILEPATH_INFO, and use
-it if available. Otherwise, it can use PATH_INFO. For example, in
-Perl, one might use:
-<PRE>
- $path_info = $ENV{'FILEPATH_INFO'} || $ENV{'PATH_INFO'};
-</PRE>
-
-<P>By doing this, a script can work with all servers supporting the
-CGI/1.1 specification, including all versions of Apache.</P>
-
-<!--#include virtual="footer.html" -->
-</BODY>
-</HTML>
-