Makefile- acl.c
- acl.h
- acldata.c
- acldata.h
- auth.c
- auth.h
- config.c
- config.h
- configmanager.c
- configmanager.h
- error.c
- error.h
- event.c
- event.h
- event_bsd.c
- event_bsd.h
- event_linux.c
- event_linux.h
- event_solaris.c
- event_solaris.h
- func.c
- func.h
- http.c
- http.h
- httplistener.c
- httplistener.h
- httpparser.c
- httpparser.h
- httprequest.c
- httprequest.h
- keyfile_auth.c
- keyfile_auth.h
- ldap_auth.c
- ldap_auth.h
- ldap_resource.c
- ldap_resource.h
- location.c
- location.h
- log.c
- log.h
- main.c
- netsite.h
- objs.mk
- protocol.c
- protocol.h
- req.c
- req.h
- request.c
- request.h
- resourcepool.c
- resourcepool.h
- rewrite.c
- rewrite.h
- session.c
- session.h
- sessionhandler.c
- sessionhandler.h
- srvctrl.c
- srvctrl.h
- threadpools.c
- threadpools.h
- vfs.c
- vfs.h
- vserver.c
- vserver.h
- webserver.c
- webserver.h
- websocket.c
- websocket.h
- ws-fn.c
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 2025 Olaf Wintermann. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "rewrite.h"
#include "config.h"
RewriteRule* rewrite_rule_create(ServerConfiguration *cfg, cxmutstr regex, cxmutstr url) {
const CxAllocator *a = cfg->a;
regex_t reg;
if(regex.ptr) {
if(regcomp(®, regex.ptr, REG_EXTENDED)) {
log_ereport(LOG_FAILURE, "rewrite: cannot compile regex: %s", regex.ptr);
return NULL;
}
}
RewriteRule *rule = cxMalloc(a, sizeof(RewriteRule));
if(!rule) {
return NULL;
}
rule->has_regex = regex.ptr != NULL;
rule->regex = reg;
rule->url = string_template_compile(a, cx_strcast(url));
if(!rule->url) {
return NULL;
}
return rule;
}
typedef struct RVar {
cxstring str;
regmatch_t *match;
int nmatch;
} RVar;
static cxmutstr get_var(
const CxAllocator *a,
StringTemplateSegment *seg,
RVar *vardata,
WSBool *free_str)
{
if(seg->type != STRING_SEGMENT_NUM_PLACEHOLDER || seg->num < 0 || seg->num >= vardata->nmatch) {
return (cxmutstr){NULL, 0};
}
regmatch_t m = vardata->match[seg->num];
if(m.rm_eo == -1 || m.rm_so == -1) {
return (cxmutstr){NULL, 0};
}
cxstring ret = cx_strsubsl(vardata->str, m.rm_so, m.rm_eo-m.rm_so);
return (cxmutstr){(char*)ret.ptr, ret.length};
}
int rewrite_url(
RewriteRule *rule,
regmatch_t *match,
int nmatch,
const CxAllocator *a,
const char *url,
char **new_url)
{
*new_url = NULL;
RVar vars;
vars.str = cx_str(url);
vars.match = match;
vars.nmatch = nmatch;
regmatch_t rewrite_match[WS_REWRITE_NMATCH];
if(rule->has_regex) {
if(regexec(&rule->regex, url, WS_REWRITE_NMATCH, rewrite_match, 0) != 0) {
return 0;
}
vars.match = rewrite_match;
vars.nmatch = WS_REWRITE_NMATCH;
}
// build new url
cxmutstr newstr = string_template_build_string(rule->url, a, (strtpl_var_func)get_var, &vars);
if(newstr.length == 0) {
return 1;
}
*new_url = newstr.ptr;
return 0;
}