<div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#sharding">URL-based sharding accross multiple backends</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#on-the-fly-content">On-the-fly Content-Regeneration</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#load-balancing">Load Balancing</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#autorefresh">Document With Autorefresh</a></li>
</ul><h3>See also</h3><ul class="seealso"><li><a href="../mod/mod_rewrite.html">Module documentation</a></li><li><a href="intro.html">mod_rewrite introduction</a></li><li><a href="remapping.html">Redirection and remapping</a></li><li><a href="access.html">Controlling access</a></li><li><a href="avoid.html">When not to use mod_rewrite</a></li></ul></div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
</dd>
</dl>
+</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="section">
+<h2><a name="autorefresh" id="autorefresh">Document With Autorefresh</a></h2>
+
+
+
+ <dl>
+ <dt>Description:</dt>
+
+ <dd>
+ <p>Wouldn't it be nice, while creating a complex web page, if
+ the web browser would automatically refresh the page every
+ time we save a new version from within our editor?
+ Impossible?</p>
+ </dd>
+
+ <dt>Solution:</dt>
+
+ <dd>
+ <p>No! We just combine the MIME multipart feature, the
+ web server NPH feature, and the URL manipulation power of
+ <code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code>. First, we establish a new
+ URL feature: Adding just <code>:refresh</code> to any
+ URL causes the 'page' to be refreshed every time it is
+ updated on the filesystem.</p>
+
+<div class="example"><pre>
+RewriteRule ^(/[uge]/[^/]+/?.*):refresh /internal/cgi/apache/nph-refresh?f=$1
+</pre></div>
+
+ <p>Now when we reference the URL</p>
+
+<div class="example"><pre>
+/u/foo/bar/page.html:refresh
+</pre></div>
+
+ <p>this leads to the internal invocation of the URL</p>
+
+<div class="example"><pre>
+/internal/cgi/apache/nph-refresh?f=/u/foo/bar/page.html
+</pre></div>
+
+ <p>The only missing part is the NPH-CGI script. Although
+ one would usually say "left as an exercise to the reader"
+ ;-) I will provide this, too.</p>
+
+<div class="example"><pre>
+#!/sw/bin/perl
+##
+## nph-refresh -- NPH/CGI script for auto refreshing pages
+## Copyright (c) 1997 Ralf S. Engelschall, All Rights Reserved.
+##
+$| = 1;
+
+# split the QUERY_STRING variable
+@pairs = split(/&/, $ENV{'QUERY_STRING'});
+foreach $pair (@pairs) {
+($name, $value) = split(/=/, $pair);
+$name =~ tr/A-Z/a-z/;
+$name = 'QS_' . $name;
+$value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
+eval "\$$name = \"$value\"";
+}
+$QS_s = 1 if ($QS_s eq '');
+$QS_n = 3600 if ($QS_n eq '');
+if ($QS_f eq '') {
+print "HTTP/1.0 200 OK\n";
+print "Content-type: text/html\n\n";
+print "&lt;b&gt;ERROR&lt;/b&gt;: No file given\n";
+exit(0);
+}
+if (! -f $QS_f) {
+print "HTTP/1.0 200 OK\n";
+print "Content-type: text/html\n\n";
+print "&lt;b&gt;ERROR&lt;/b&gt;: File $QS_f not found\n";
+exit(0);
+}
+
+sub print_http_headers_multipart_begin {
+print "HTTP/1.0 200 OK\n";
+$bound = "ThisRandomString12345";
+print "Content-type: multipart/x-mixed-replace;boundary=$bound\n";
+&print_http_headers_multipart_next;
+}
+
+sub print_http_headers_multipart_next {
+print "\n--$bound\n";
+}
+
+sub print_http_headers_multipart_end {
+print "\n--$bound--\n";
+}
+
+sub displayhtml {
+local($buffer) = @_;
+$len = length($buffer);
+print "Content-type: text/html\n";
+print "Content-length: $len\n\n";
+print $buffer;
+}
+
+sub readfile {
+local($file) = @_;
+local(*FP, $size, $buffer, $bytes);
+($x, $x, $x, $x, $x, $x, $x, $size) = stat($file);
+$size = sprintf("%d", $size);
+open(FP, "&lt;$file");
+$bytes = sysread(FP, $buffer, $size);
+close(FP);
+return $buffer;
+}
+
+$buffer = &readfile($QS_f);
+&print_http_headers_multipart_begin;
+&displayhtml($buffer);
+
+sub mystat {
+local($file) = $_[0];
+local($time);
+
+($x, $x, $x, $x, $x, $x, $x, $x, $x, $mtime) = stat($file);
+return $mtime;
+}
+
+$mtimeL = &mystat($QS_f);
+$mtime = $mtime;
+for ($n = 0; $n &lt; $QS_n; $n++) {
+while (1) {
+ $mtime = &mystat($QS_f);
+ if ($mtime ne $mtimeL) {
+ $mtimeL = $mtime;
+ sleep(2);
+ $buffer = &readfile($QS_f);
+ &print_http_headers_multipart_next;
+ &displayhtml($buffer);
+ sleep(5);
+ $mtimeL = &mystat($QS_f);
+ last;
+ }
+ sleep($QS_s);
+}
+}
+
+&print_http_headers_multipart_end;
+
+exit(0);
+
+##EOF##
+</pre></div>
+ </dd>
+ </dl>
+
</div></div>
<div class="bottomlang">
<p><span>Available Languages: </span><a href="../en/rewrite/avoid.html" title="English"> en </a></p>
</section>
+<section id="autorefresh">
+ <title>Document With Autorefresh</title>
+
+ <dl>
+ <dt>Description:</dt>
+
+ <dd>
+ <p>Wouldn't it be nice, while creating a complex web page, if
+ the web browser would automatically refresh the page every
+ time we save a new version from within our editor?
+ Impossible?</p>
+ </dd>
+
+ <dt>Solution:</dt>
+
+ <dd>
+ <p>No! We just combine the MIME multipart feature, the
+ web server NPH feature, and the URL manipulation power of
+ <module>mod_rewrite</module>. First, we establish a new
+ URL feature: Adding just <code>:refresh</code> to any
+ URL causes the 'page' to be refreshed every time it is
+ updated on the filesystem.</p>
+
+<example><pre>
+RewriteRule ^(/[uge]/[^/]+/?.*):refresh /internal/cgi/apache/nph-refresh?f=$1
+</pre></example>
+
+ <p>Now when we reference the URL</p>
+
+<example><pre>
+/u/foo/bar/page.html:refresh
+</pre></example>
+
+ <p>this leads to the internal invocation of the URL</p>
+
+<example><pre>
+/internal/cgi/apache/nph-refresh?f=/u/foo/bar/page.html
+</pre></example>
+
+ <p>The only missing part is the NPH-CGI script. Although
+ one would usually say "left as an exercise to the reader"
+ ;-) I will provide this, too.</p>
+
+<example><pre>
+#!/sw/bin/perl
+##
+## nph-refresh -- NPH/CGI script for auto refreshing pages
+## Copyright (c) 1997 Ralf S. Engelschall, All Rights Reserved.
+##
+$| = 1;
+
+# split the QUERY_STRING variable
+@pairs = split(/&/, $ENV{'QUERY_STRING'});
+foreach $pair (@pairs) {
+($name, $value) = split(/=/, $pair);
+$name =~ tr/A-Z/a-z/;
+$name = 'QS_' . $name;
+$value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
+eval "\$$name = \"$value\"";
+}
+$QS_s = 1 if ($QS_s eq '');
+$QS_n = 3600 if ($QS_n eq '');
+if ($QS_f eq '') {
+print "HTTP/1.0 200 OK\n";
+print "Content-type: text/html\n\n";
+print "&lt;b&gt;ERROR&lt;/b&gt;: No file given\n";
+exit(0);
+}
+if (! -f $QS_f) {
+print "HTTP/1.0 200 OK\n";
+print "Content-type: text/html\n\n";
+print "&lt;b&gt;ERROR&lt;/b&gt;: File $QS_f not found\n";
+exit(0);
+}
+
+sub print_http_headers_multipart_begin {
+print "HTTP/1.0 200 OK\n";
+$bound = "ThisRandomString12345";
+print "Content-type: multipart/x-mixed-replace;boundary=$bound\n";
+&print_http_headers_multipart_next;
+}
+
+sub print_http_headers_multipart_next {
+print "\n--$bound\n";
+}
+
+sub print_http_headers_multipart_end {
+print "\n--$bound--\n";
+}
+
+sub displayhtml {
+local($buffer) = @_;
+$len = length($buffer);
+print "Content-type: text/html\n";
+print "Content-length: $len\n\n";
+print $buffer;
+}
+
+sub readfile {
+local($file) = @_;
+local(*FP, $size, $buffer, $bytes);
+($x, $x, $x, $x, $x, $x, $x, $size) = stat($file);
+$size = sprintf("%d", $size);
+open(FP, "&lt;$file");
+$bytes = sysread(FP, $buffer, $size);
+close(FP);
+return $buffer;
+}
+
+$buffer = &readfile($QS_f);
+&print_http_headers_multipart_begin;
+&displayhtml($buffer);
+
+sub mystat {
+local($file) = $_[0];
+local($time);
+
+($x, $x, $x, $x, $x, $x, $x, $x, $x, $mtime) = stat($file);
+return $mtime;
+}
+
+$mtimeL = &mystat($QS_f);
+$mtime = $mtime;
+for ($n = 0; $n &lt; $QS_n; $n++) {
+while (1) {
+ $mtime = &mystat($QS_f);
+ if ($mtime ne $mtimeL) {
+ $mtimeL = $mtime;
+ sleep(2);
+ $buffer = &readfile($QS_f);
+ &print_http_headers_multipart_next;
+ &displayhtml($buffer);
+ sleep(5);
+ $mtimeL = &mystat($QS_f);
+ last;
+ }
+ sleep($QS_s);
+}
+}
+
+&print_http_headers_multipart_end;
+
+exit(0);
+
+##EOF##
+</pre></example>
+ </dd>
+ </dl>
+
+</section>
</manualpage>
<li><img alt="" src="../images/down.gif" /> <a href="#dynamic-mirror">Dynamic Mirror</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#retrieve-missing-data">Retrieve Missing Data from Intranet</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#new-mime-type">New MIME-type, New Service</a></li>
-<li><img alt="" src="../images/down.gif" /> <a href="#autorefresh">Document With Autorefresh</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#mass-virtual-hosting">Mass Virtual Hosting</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#proxy-deny">Proxy Deny</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#referer-deflector">Referer-based Deflector</a></li>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
-<h2><a name="autorefresh" id="autorefresh">Document With Autorefresh</a></h2>
-
-
-
- <dl>
- <dt>Description:</dt>
-
- <dd>
- <p>Wouldn't it be nice, while creating a complex web page, if
- the web browser would automatically refresh the page every
- time we save a new version from within our editor?
- Impossible?</p>
- </dd>
-
- <dt>Solution:</dt>
-
- <dd>
- <p>No! We just combine the MIME multipart feature, the
- web server NPH feature, and the URL manipulation power of
- <code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code>. First, we establish a new
- URL feature: Adding just <code>:refresh</code> to any
- URL causes the 'page' to be refreshed every time it is
- updated on the filesystem.</p>
-
-<div class="example"><pre>
-RewriteRule ^(/[uge]/[^/]+/?.*):refresh /internal/cgi/apache/nph-refresh?f=$1
-</pre></div>
-
- <p>Now when we reference the URL</p>
-
-<div class="example"><pre>
-/u/foo/bar/page.html:refresh
-</pre></div>
-
- <p>this leads to the internal invocation of the URL</p>
-
-<div class="example"><pre>
-/internal/cgi/apache/nph-refresh?f=/u/foo/bar/page.html
-</pre></div>
-
- <p>The only missing part is the NPH-CGI script. Although
- one would usually say "left as an exercise to the reader"
- ;-) I will provide this, too.</p>
-
-<div class="example"><pre>
-#!/sw/bin/perl
-##
-## nph-refresh -- NPH/CGI script for auto refreshing pages
-## Copyright (c) 1997 Ralf S. Engelschall, All Rights Reserved.
-##
-$| = 1;
-
-# split the QUERY_STRING variable
-@pairs = split(/&/, $ENV{'QUERY_STRING'});
-foreach $pair (@pairs) {
- ($name, $value) = split(/=/, $pair);
- $name =~ tr/A-Z/a-z/;
- $name = 'QS_' . $name;
- $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
- eval "\$$name = \"$value\"";
-}
-$QS_s = 1 if ($QS_s eq '');
-$QS_n = 3600 if ($QS_n eq '');
-if ($QS_f eq '') {
- print "HTTP/1.0 200 OK\n";
- print "Content-type: text/html\n\n";
- print "&lt;b&gt;ERROR&lt;/b&gt;: No file given\n";
- exit(0);
-}
-if (! -f $QS_f) {
- print "HTTP/1.0 200 OK\n";
- print "Content-type: text/html\n\n";
- print "&lt;b&gt;ERROR&lt;/b&gt;: File $QS_f not found\n";
- exit(0);
-}
-
-sub print_http_headers_multipart_begin {
- print "HTTP/1.0 200 OK\n";
- $bound = "ThisRandomString12345";
- print "Content-type: multipart/x-mixed-replace;boundary=$bound\n";
- &print_http_headers_multipart_next;
-}
-
-sub print_http_headers_multipart_next {
- print "\n--$bound\n";
-}
-
-sub print_http_headers_multipart_end {
- print "\n--$bound--\n";
-}
-
-sub displayhtml {
- local($buffer) = @_;
- $len = length($buffer);
- print "Content-type: text/html\n";
- print "Content-length: $len\n\n";
- print $buffer;
-}
-
-sub readfile {
- local($file) = @_;
- local(*FP, $size, $buffer, $bytes);
- ($x, $x, $x, $x, $x, $x, $x, $size) = stat($file);
- $size = sprintf("%d", $size);
- open(FP, "&lt;$file");
- $bytes = sysread(FP, $buffer, $size);
- close(FP);
- return $buffer;
-}
-
-$buffer = &readfile($QS_f);
-&print_http_headers_multipart_begin;
-&displayhtml($buffer);
-
-sub mystat {
- local($file) = $_[0];
- local($time);
-
- ($x, $x, $x, $x, $x, $x, $x, $x, $x, $mtime) = stat($file);
- return $mtime;
-}
-
-$mtimeL = &mystat($QS_f);
-$mtime = $mtime;
-for ($n = 0; $n &lt; $QS_n; $n++) {
- while (1) {
- $mtime = &mystat($QS_f);
- if ($mtime ne $mtimeL) {
- $mtimeL = $mtime;
- sleep(2);
- $buffer = &readfile($QS_f);
- &print_http_headers_multipart_next;
- &displayhtml($buffer);
- sleep(5);
- $mtimeL = &mystat($QS_f);
- last;
- }
- sleep($QS_s);
- }
-}
-
-&print_http_headers_multipart_end;
-
-exit(0);
-
-##EOF##
-</pre></div>
- </dd>
- </dl>
-
- </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
-<div class="section">
<h2><a name="mass-virtual-hosting" id="mass-virtual-hosting">Mass Virtual Hosting</a></h2>
</section>
- <section id="autorefresh">
-
- <title>Document With Autorefresh</title>
-
- <dl>
- <dt>Description:</dt>
-
- <dd>
- <p>Wouldn't it be nice, while creating a complex web page, if
- the web browser would automatically refresh the page every
- time we save a new version from within our editor?
- Impossible?</p>
- </dd>
-
- <dt>Solution:</dt>
-
- <dd>
- <p>No! We just combine the MIME multipart feature, the
- web server NPH feature, and the URL manipulation power of
- <module>mod_rewrite</module>. First, we establish a new
- URL feature: Adding just <code>:refresh</code> to any
- URL causes the 'page' to be refreshed every time it is
- updated on the filesystem.</p>
-
-<example><pre>
-RewriteRule ^(/[uge]/[^/]+/?.*):refresh /internal/cgi/apache/nph-refresh?f=$1
-</pre></example>
-
- <p>Now when we reference the URL</p>
-
-<example><pre>
-/u/foo/bar/page.html:refresh
-</pre></example>
-
- <p>this leads to the internal invocation of the URL</p>
-
-<example><pre>
-/internal/cgi/apache/nph-refresh?f=/u/foo/bar/page.html
-</pre></example>
-
- <p>The only missing part is the NPH-CGI script. Although
- one would usually say "left as an exercise to the reader"
- ;-) I will provide this, too.</p>
-
-<example><pre>
-#!/sw/bin/perl
-##
-## nph-refresh -- NPH/CGI script for auto refreshing pages
-## Copyright (c) 1997 Ralf S. Engelschall, All Rights Reserved.
-##
-$| = 1;
-
-# split the QUERY_STRING variable
-@pairs = split(/&/, $ENV{'QUERY_STRING'});
-foreach $pair (@pairs) {
- ($name, $value) = split(/=/, $pair);
- $name =~ tr/A-Z/a-z/;
- $name = 'QS_' . $name;
- $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
- eval "\$$name = \"$value\"";
-}
-$QS_s = 1 if ($QS_s eq '');
-$QS_n = 3600 if ($QS_n eq '');
-if ($QS_f eq '') {
- print "HTTP/1.0 200 OK\n";
- print "Content-type: text/html\n\n";
- print "&lt;b&gt;ERROR&lt;/b&gt;: No file given\n";
- exit(0);
-}
-if (! -f $QS_f) {
- print "HTTP/1.0 200 OK\n";
- print "Content-type: text/html\n\n";
- print "&lt;b&gt;ERROR&lt;/b&gt;: File $QS_f not found\n";
- exit(0);
-}
-
-sub print_http_headers_multipart_begin {
- print "HTTP/1.0 200 OK\n";
- $bound = "ThisRandomString12345";
- print "Content-type: multipart/x-mixed-replace;boundary=$bound\n";
- &print_http_headers_multipart_next;
-}
-
-sub print_http_headers_multipart_next {
- print "\n--$bound\n";
-}
-
-sub print_http_headers_multipart_end {
- print "\n--$bound--\n";
-}
-
-sub displayhtml {
- local($buffer) = @_;
- $len = length($buffer);
- print "Content-type: text/html\n";
- print "Content-length: $len\n\n";
- print $buffer;
-}
-
-sub readfile {
- local($file) = @_;
- local(*FP, $size, $buffer, $bytes);
- ($x, $x, $x, $x, $x, $x, $x, $size) = stat($file);
- $size = sprintf("%d", $size);
- open(FP, "&lt;$file");
- $bytes = sysread(FP, $buffer, $size);
- close(FP);
- return $buffer;
-}
-
-$buffer = &readfile($QS_f);
-&print_http_headers_multipart_begin;
-&displayhtml($buffer);
-
-sub mystat {
- local($file) = $_[0];
- local($time);
-
- ($x, $x, $x, $x, $x, $x, $x, $x, $x, $mtime) = stat($file);
- return $mtime;
-}
-
-$mtimeL = &mystat($QS_f);
-$mtime = $mtime;
-for ($n = 0; $n &lt; $QS_n; $n++) {
- while (1) {
- $mtime = &mystat($QS_f);
- if ($mtime ne $mtimeL) {
- $mtimeL = $mtime;
- sleep(2);
- $buffer = &readfile($QS_f);
- &print_http_headers_multipart_next;
- &displayhtml($buffer);
- sleep(5);
- $mtimeL = &mystat($QS_f);
- last;
- }
- sleep($QS_s);
- }
-}
-
-&print_http_headers_multipart_end;
-
-exit(0);
-
-##EOF##
-</pre></example>
- </dd>
- </dl>
-
- </section>
-
<section id="mass-virtual-hosting">
<title>Mass Virtual Hosting</title>
projects / apache / commitdiff