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/*
* Copyright (c) 2010, FRiCKLE Piotr Sikora <info@frickle.com>
* 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
* HOLDERS 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.
*/
#ifndef DDEBUG
#define DDEBUG 0
#endif
#include "ngx_postgres_ddebug.h"
#include "ngx_postgres_escape.h"
#include "ngx_postgres_module.h"
#include <libpq-fe.h>
uintptr_t ngx_postgres_script_exit_code = (uintptr_t) NULL;
void
ngx_postgres_escape_string(ngx_http_script_engine_t *e)
{
ngx_postgres_escape_t *pge;
ngx_http_variable_value_t *v;
u_char *p, *s;
v = e->sp - 1;
dd("entering: \"%.*s\"", (int) v->len, v->data);
pge = (ngx_postgres_escape_t *) e->ip;
e->ip += sizeof(ngx_postgres_escape_t);
if ((v == NULL) || (v->not_found)) {
v->data = (u_char *) "NULL";
v->len = sizeof("NULL") - 1;
dd("returning (NULL)");
goto done;
}
if (v->len == 0) {
if (pge->empty) {
v->data = (u_char *) "''";
v->len = 2;
dd("returning (empty/empty)");
goto done;
} else {
v->data = (u_char *) "NULL";
v->len = sizeof("NULL") - 1;
dd("returning (empty/NULL)");
goto done;
}
}
s = p = ngx_pnalloc(e->request->pool, 2 * v->len + 2);
if (p == NULL) {
e->ip = (u_char *) &ngx_postgres_script_exit_code;
e->status = NGX_HTTP_INTERNAL_SERVER_ERROR;
dd("returning (NGX_HTTP_INTERNAL_SERVER_ERROR)");
return;
}
*p++ = '\'';
v->len = PQescapeString((char *) p, (const char *) v->data, v->len);
p[v->len] = '\'';
v->len += 2;
v->data = s;
dd("returning");
done:
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
}
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