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105 lines
4.1 KiB
105 lines
4.1 KiB
From 57ab20ace504fdb6e0944ef6fa6e0ce35adc4446 Mon Sep 17 00:00:00 2001
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From: Glenn Strauss <gstrauss@gluelogic.com>
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Date: Sun, 26 Feb 2017 17:49:47 -0500
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Subject: [PATCH] [mod_cgi] cgi.local-redir = [enable|disable] (#2108, #2793)
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new directive cgi.local-redir = [enable|disable]
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*disable* RFC3875 6.2.2 local-redir by default.
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(behavior change from when local-redir support added in lighttpd 1.4.40)
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The reason for this behavior change is that CGI local-redir support
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(RFC3875 6.2.2) is an optimization. Absence of support may result in
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additional latency in servicing a request due the additional round-trip
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to the client, but that was the prior behavior (before lighttpd 1.4.40)
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and is the behavior of web servers which do not support CGI local-redir.
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However, enabling CGI local-redir by default may result in broken links
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in the case where a user config (unaware of CGI local-redir behavior)
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returns HTML pages containing *relative* paths (not root-relative paths)
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which are relative to the location of the local-redir target document,
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and the local-redir target document is located at a different URL-path
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from the original CGI request.
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x-ref:
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RFC3875 CGI 1.1 specification section 6.2.2 Local Redirect Response
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http://www.ietf.org/rfc/rfc3875
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"CGI local redirect not implemented correctly"
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https://redmine.lighttpd.net/issues/2108
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"1.4.40 regression: broken redirect (using Location) between url.rewrite-once URLs"
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https://redmine.lighttpd.net/issues/2793
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---
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src/mod_cgi.c | 9 ++++++++-
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tests/lighttpd.conf | 1 +
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2 files changed, 9 insertions(+), 1 deletion(-)
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--- a/src/mod_cgi.c
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+++ b/src/mod_cgi.c
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@@ -66,6 +66,7 @@ typedef struct {
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typedef struct {
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array *cgi;
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unsigned short execute_x_only;
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+ unsigned short local_redir;
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unsigned short xsendfile_allow;
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array *xsendfile_docroot;
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} plugin_config;
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@@ -172,6 +173,7 @@ SETDEFAULTS_FUNC(mod_fastcgi_set_default
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{ "cgi.execute-x-only", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 1 */
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{ "cgi.x-sendfile", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 2 */
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{ "cgi.x-sendfile-docroot", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 3 */
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+ { "cgi.local-redir", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 4 */
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{ NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET}
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};
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@@ -189,6 +191,7 @@ SETDEFAULTS_FUNC(mod_fastcgi_set_default
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s->cgi = array_init();
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s->execute_x_only = 0;
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+ s->local_redir = 0;
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s->xsendfile_allow= 0;
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s->xsendfile_docroot = array_init();
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@@ -196,6 +199,7 @@ SETDEFAULTS_FUNC(mod_fastcgi_set_default
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cv[1].destination = &(s->execute_x_only);
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cv[2].destination = &(s->xsendfile_allow);
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cv[3].destination = s->xsendfile_docroot;
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+ cv[4].destination = &(s->local_redir);
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p->config_storage[i] = s;
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@@ -549,7 +553,7 @@ static int cgi_demux_response(server *sr
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* to same URL, since CGI should have handled it internally if it
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* really wanted to do that internally)
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*/
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- if (con->http_status >= 300 && con->http_status < 400) {
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+ if (hctx->conf.local_redir && con->http_status >= 300 && con->http_status < 400) {
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/*(con->parsed_response & HTTP_LOCATION)*/
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size_t ulen = buffer_string_length(con->uri.path);
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data_string *ds;
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@@ -1321,6 +1325,7 @@ static int mod_cgi_patch_connection(serv
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PATCH(cgi);
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PATCH(execute_x_only);
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+ PATCH(local_redir);
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PATCH(xsendfile_allow);
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PATCH(xsendfile_docroot);
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@@ -1340,6 +1345,8 @@ static int mod_cgi_patch_connection(serv
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PATCH(cgi);
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} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("cgi.execute-x-only"))) {
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PATCH(execute_x_only);
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+ } else if (buffer_is_equal_string(du->key, CONST_STR_LEN("cgi.local-redir"))) {
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+ PATCH(local_redir);
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} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("cgi.x-sendfile"))) {
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PATCH(xsendfile_allow);
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} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("cgi.x-sendfile-docroot"))) {
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--- a/tests/lighttpd.conf
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+++ b/tests/lighttpd.conf
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@@ -110,6 +110,7 @@ fastcgi.server = (
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) ),
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)
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+cgi.local-redir = "enable"
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cgi.assign = (
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".pl" => env.PERL,
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".cgi" => env.PERL,
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