Forum: NGINX A more general substitution filter module

Announcement (2017-05-07): www.ruby-forum.com is now read-only since I unfortunately do not have the time to support and maintain the forum any more. Please see rubyonrails.org/community and ruby-lang.org/en/community for other Rails- und Ruby-related community platforms.
Weibin Y. (Guest)
on 2009-02-04 07:55
(Received via mailing list)
nginx_substitutions_filter
-------

nginx_substitutions_filter is a filter module which can do both regular
expression and fixed string substitutions on response bodies. This
module is
quite different from the Nginx's Substitution Module. It scans the
output
chains buffer and matches string line by line, just like Apache's
mod_substitute.

To install, compile nginx with the following option:

  --add-module=/path/to/this/directory

EXAMPLE

  subs_filter_types text/html text/css text/xml;
  subs_filter http://st(\\d*).example.com http://s.example.com ir;
  subs_filter http://a.example.com http://s.example.com;

DIRECTIVES

    subs_filter_types

    syntax: subs_filter_types mime-type [mime-type ...]
    default: subs_filter_types text/html
    context: http, server, location
    description: subs_filter_types is used to specify which content
types should
        be checked for subs_filter. The default is only text/html.


    subs_filter

    syntax: subs_filter source_str destination_str [gior]
    default: none
    context: http, server, location
    description: subs_filter allows replacing source stringe(regular
expression
        or fixed) in the nginx response with destination string.
Substitution
        text may contain variables. More than one substitution rules per
        location is supported.
        The meaning of the third flags are:
            g(default): Replace all the match strings.
            i: Perform a case-insensitive match.
            o: Just replace the first one.
            r: The pattern is treated as a regular expression, default
is fixed
               string.

Questions/patches may be directed to Weibin Y., 
removed_email_address@domain.invalid.
Weibin Y. (Guest)
on 2009-02-23 12:20
Two bug fixed in some compiler, this is the patch:

Index: ngx_http_subs_filter_module.c
===================================================================
--- ngx_http_subs_filter_module.c
+++ ngx_http_subs_filter_module.c
@@ -21,7 +21,7 @@
     ngx_str_t      match;
 #if (NGX_PCRE)
     ngx_regex_t   *match_regex;
-    ngx_int_t     *captures;
+    int           *captures;
     ngx_int_t     ncaptures;
 #endif

@@ -710,8 +710,8 @@
             }
             if (pair->captures == NULL || pair->ncaptures == 0) {
                 pair->ncaptures = OVECCOUNT;
-                pair->captures =ngx_palloc(r->pool,
-                        OVECCOUNT * sizeof(ngx_int_t));
+                pair->captures = (int *)(ngx_int_t)ngx_palloc(r->pool,
+                        OVECCOUNT * sizeof(int));
             }

             while (1) {
@@ -726,7 +726,7 @@
                     break;

                 rc = ngx_regex_exec(pair->match_regex, &line,
-                        pair->captures, pair->ncaptures);
+                        (int *)pair->captures, pair->ncaptures);
                 if (rc == NGX_REGEX_NO_MATCHED)
                     break;
                 else if(rc < 0) {
@@ -1053,7 +1053,7 @@
                 break;
             }

-            ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
+            ngx_log_debug2(NGX_LOG_DEBUG_HTTP, log, 0,
                     "Left bytes:%d, p:%p ", bytes, p);
             /*There is nothing left in this buffer.*/
             if (cl->buf->last - p <= 0)




Weibin Y. wrote:
> nginx_substitutions_filter
> -------
>
> nginx_substitutions_filter is a filter module which can do both regular
> expression and fixed string substitutions on response bodies. This
> module is
> quite different from the Nginx's Substitution Module. It scans the
> output
> chains buffer and matches string line by line, just like Apache's
> mod_substitute.
>
> To install, compile nginx with the following option:
>
>   --add-module=/path/to/this/directory
>
> EXAMPLE
>
>   subs_filter_types text/html text/css text/xml;
>   subs_filter http://st(\\d*).example.com http://s.example.com ir;
>   subs_filter http://a.example.com http://s.example.com;
>
> DIRECTIVES
>
>     subs_filter_types
>
>     syntax: subs_filter_types mime-type [mime-type ...]
>     default: subs_filter_types text/html
>     context: http, server, location
>     description: subs_filter_types is used to specify which content
> types should
>         be checked for subs_filter. The default is only text/html.
>
>
>     subs_filter
>
>     syntax: subs_filter source_str destination_str [gior]
>     default: none
>     context: http, server, location
>     description: subs_filter allows replacing source stringe(regular
> expression
>         or fixed) in the nginx response with destination string.
> Substitution
>         text may contain variables. More than one substitution rules per
>         location is supported.
>         The meaning of the third flags are:
>             g(default): Replace all the match strings.
>             i: Perform a case-insensitive match.
>             o: Just replace the first one.
>             r: The pattern is treated as a regular expression, default
> is fixed
>                string.
>
> Questions/patches may be directed to Weibin Y., removed_email_address@domain.invalid.
This topic is locked and can not be replied to.