php-src/ext/standard/url_scanner_ex.re
Sebastian Bergmann 38933514e1 Update headers.
2001-12-11 15:32:16 +00:00

409 lines
9.9 KiB
C++

/*
+----------------------------------------------------------------------+
| PHP Version 4 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2002 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.02 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.php.net/license/2_02.txt. |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Sascha Schumann <sascha@schumann.cx> |
+----------------------------------------------------------------------+
*/
#include "php.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "php_ini.h"
#include "php_globals.h"
#define STATE_TAG SOME_OTHER_STATE_TAG
#include "basic_functions.h"
#undef STATE_TAG
#define url_adapt_ext url_adapt_ext_ex
#define url_scanner url_scanner_ex
#include "php_smart_str.h"
static PHP_INI_MH(OnUpdateTags)
{
url_adapt_state_ex_t *ctx;
char *key;
char *lasts;
char *tmp;
ctx = &BG(url_adapt_state_ex);
tmp = estrndup(new_value, new_value_length);
if (ctx->tags)
zend_hash_destroy(ctx->tags);
else
ctx->tags = malloc(sizeof(HashTable));
zend_hash_init(ctx->tags, 0, NULL, NULL, 1);
for (key = php_strtok_r(tmp, ",", &lasts);
key;
key = php_strtok_r(NULL, ",", &lasts)) {
char *val;
val = strchr(key, '=');
if (val) {
char *q;
int keylen;
*val++ = '\0';
for (q = key; *q; q++)
*q = tolower(*q);
keylen = q - key;
/* key is stored withOUT NUL
val is stored WITH NUL */
zend_hash_add(ctx->tags, key, keylen, val, strlen(val)+1, NULL);
}
}
efree(tmp);
return SUCCESS;
}
PHP_INI_BEGIN()
STD_PHP_INI_ENTRY("url_rewriter.tags", "a=href,area=href,frame=src,form=fakeentry", PHP_INI_ALL, OnUpdateTags, url_adapt_state_ex, php_basic_globals, basic_globals)
PHP_INI_END()
/*!re2c
any = [\000-\377];
N = (any\[<]);
alpha = [a-zA-Z];
*/
#define YYFILL(n) goto done
#define YYCTYPE unsigned char
#define YYCURSOR p
#define YYLIMIT q
#define YYMARKER r
static inline void append_modified_url(smart_str *url, smart_str *dest, smart_str *name, smart_str *val, const char *separator)
{
register const char *p, *q;
const char *bash = NULL;
const char *sep = "?";
q = (p = url->c) + url->len;
scan:
/*!re2c
":" { smart_str_append(dest, url); return; }
"?" { sep = separator; goto scan; }
"#" { bash = p - 1; goto done; }
(any\[:?#])+ { goto scan; }
*/
done:
/* Don't modify URLs of the format "#mark" */
if (bash && bash - url->c == 0) {
smart_str_append(dest, url);
return;
}
if (bash)
smart_str_appendl(dest, url->c, bash - url->c);
else
smart_str_append(dest, url);
smart_str_appends(dest, sep);
smart_str_append(dest, name);
smart_str_appendc(dest, '=');
smart_str_append(dest, val);
if (bash)
smart_str_appendl(dest, bash, q - bash);
}
#undef YYFILL
#undef YYCTYPE
#undef YYCURSOR
#undef YYLIMIT
#undef YYMARKER
static inline void tag_arg(url_adapt_state_ex_t *ctx, char quote TSRMLS_DC)
{
char f = 0;
if (strncasecmp(ctx->arg.c, ctx->lookup_data, ctx->arg.len) == 0)
f = 1;
smart_str_appendc(&ctx->result, quote);
if (f) {
append_modified_url(&ctx->val, &ctx->result, &ctx->q_name, &ctx->q_value, PG(arg_separator).output);
} else {
smart_str_append(&ctx->result, &ctx->val);
}
smart_str_appendc(&ctx->result, quote);
}
enum {
STATE_PLAIN = 0,
STATE_TAG,
STATE_NEXT_ARG,
STATE_ARG,
STATE_BEFORE_VAL,
STATE_VAL
};
#define YYFILL(n) goto stop
#define YYCTYPE unsigned char
#define YYCURSOR xp
#define YYLIMIT end
#define YYMARKER q
#define STATE ctx->state
#define STD_PARA url_adapt_state_ex_t *ctx, char *start, char *YYCURSOR TSRMLS_DC
#define STD_ARGS ctx, start, xp TSRMLS_CC
static inline void passthru(STD_PARA)
{
smart_str_appendl(&ctx->result, start, YYCURSOR - start);
}
static inline void handle_form(STD_PARA)
{
if (ctx->tag.len == 4 && strncasecmp(ctx->tag.c, "form", 4) == 0) {
smart_str_appends(&ctx->result, "<input type=\"hidden\" name=\"");
smart_str_append(&ctx->result, &ctx->q_name);
smart_str_appends(&ctx->result, "\" value=\"");
smart_str_append(&ctx->result, &ctx->q_value);
smart_str_appends(&ctx->result, "\" />");
}
}
/*
* HANDLE_TAG copies the HTML Tag and checks whether we
* have that tag in our table. If we might modify it,
* we continue to scan the tag, otherwise we simply copy the complete
* HTML stuff to the result buffer.
*/
static inline void handle_tag(STD_PARA)
{
int ok = 0;
int i;
ctx->tag.len = 0;
smart_str_appendl(&ctx->tag, start, YYCURSOR - start);
for (i = 0; i < ctx->tag.len; i++)
ctx->tag.c[i] = tolower(ctx->tag.c[i]);
if (zend_hash_find(ctx->tags, ctx->tag.c, ctx->tag.len, (void **) &ctx->lookup_data) == SUCCESS)
ok = 1;
STATE = ok ? STATE_NEXT_ARG : STATE_PLAIN;
}
static inline void handle_arg(STD_PARA)
{
ctx->arg.len = 0;
smart_str_appendl(&ctx->arg, start, YYCURSOR - start);
}
static inline void handle_val(STD_PARA, char quotes, char type)
{
smart_str_setl(&ctx->val, start + quotes, YYCURSOR - start - quotes * 2);
tag_arg(ctx, type TSRMLS_CC);
}
#ifdef SCANNER_DEBUG
#define scdebug(x) printf x
#else
#define scdebug(x)
#endif
static inline void mainloop(url_adapt_state_ex_t *ctx, const char *newdata, size_t newlen TSRMLS_DC)
{
char *end, *q;
char *xp;
char *start;
int rest;
smart_str_appendl(&ctx->buf, newdata, newlen);
YYCURSOR = ctx->buf.c;
YYLIMIT = ctx->buf.c + ctx->buf.len;
switch (STATE) {
case STATE_PLAIN: goto state_plain;
case STATE_TAG: goto state_tag;
case STATE_NEXT_ARG: goto state_next_arg;
case STATE_ARG: goto state_arg;
case STATE_BEFORE_VAL: goto state_before_val;
case STATE_VAL: goto state_val;
}
state_plain_begin:
STATE = STATE_PLAIN;
state_plain:
start = YYCURSOR;
/*!re2c
"<" { passthru(STD_ARGS); STATE = STATE_TAG; goto state_tag; }
N+ { passthru(STD_ARGS); goto state_plain; }
*/
state_tag:
start = YYCURSOR;
/*!re2c
alpha+ { handle_tag(STD_ARGS); /* Sets STATE */; passthru(STD_ARGS); if (STATE == STATE_PLAIN) goto state_plain; else goto state_next_arg; }
any { passthru(STD_ARGS); goto state_plain_begin; }
*/
state_next_arg_begin:
STATE = STATE_NEXT_ARG;
state_next_arg:
start = YYCURSOR;
/*!re2c
">" { passthru(STD_ARGS); handle_form(STD_ARGS); goto state_plain_begin; }
[ \v\t\n]+ { passthru(STD_ARGS); goto state_next_arg; }
alpha { --YYCURSOR; STATE = STATE_ARG; goto state_arg; }
any { passthru(STD_ARGS); goto state_plain_begin; }
*/
state_arg:
start = YYCURSOR;
/*!re2c
alpha+ { passthru(STD_ARGS); handle_arg(STD_ARGS); STATE = STATE_BEFORE_VAL; goto state_before_val; }
any { passthru(STD_ARGS); STATE = STATE_NEXT_ARG; goto state_next_arg; }
*/
state_before_val:
start = YYCURSOR;
/*!re2c
[ ]* "=" [ ]* { passthru(STD_ARGS); STATE = STATE_VAL; goto state_val; }
any { --YYCURSOR; goto state_next_arg_begin; }
*/
state_val:
start = YYCURSOR;
/*!re2c
["] (any\[">])* ["] { handle_val(STD_ARGS, 1, '"'); goto state_next_arg_begin; }
['] (any\['>])* ['] { handle_val(STD_ARGS, 1, '\''); goto state_next_arg_begin; }
(any\[ \n>"'])+ { handle_val(STD_ARGS, 0, '"'); goto state_next_arg_begin; }
any { passthru(STD_ARGS); goto state_next_arg_begin; }
*/
stop:
rest = YYLIMIT - start;
scdebug(("stopped in state %d at pos %d (%d:%c) %d\n", STATE, YYCURSOR - ctx->buf.c, *YYCURSOR, *YYCURSOR, rest));
/* XXX: Crash avoidance. Need to work with reporter to figure out what goes wrong */
if (rest < 0) rest = 0;
if (rest) memmove(ctx->buf.c, start, rest);
ctx->buf.len = rest;
}
char *url_adapt_single_url(const char *url, size_t urllen, const char *name, const char *value, size_t *newlen TSRMLS_DC)
{
smart_str surl = {0};
smart_str buf = {0};
smart_str sname = {0};
smart_str sval = {0};
smart_str_setl(&surl, url, urllen);
smart_str_sets(&sname, name);
smart_str_sets(&sval, value);
append_modified_url(&surl, &buf, &sname, &sval, PG(arg_separator).output);
smart_str_0(&buf);
if (newlen) *newlen = buf.len;
return buf.c;
}
char *url_adapt_ext(const char *src, size_t srclen, const char *name, const char *value, size_t *newlen, zend_bool do_flush TSRMLS_DC)
{
url_adapt_state_ex_t *ctx;
char *retval;
ctx = &BG(url_adapt_state_ex);
smart_str_sets(&ctx->q_name, name);
smart_str_sets(&ctx->q_value, value);
mainloop(ctx, src, srclen TSRMLS_CC);
*newlen = ctx->result.len;
if (!ctx->result.c) {
smart_str_appendl(&ctx->result, "", 0);
}
smart_str_0(&ctx->result);
if (do_flush) {
smart_str_appendl(&ctx->result, ctx->buf.c, ctx->buf.len);
*newlen += ctx->buf.len;
smart_str_free(&ctx->buf);
}
retval = ctx->result.c;
ctx->result.c = NULL;
ctx->result.len = 0;
return retval;
}
int php_url_scanner_ex_activate(TSRMLS_D)
{
url_adapt_state_ex_t *ctx;
ctx = &BG(url_adapt_state_ex);
memset(ctx, 0, ((size_t) &((url_adapt_state_ex_t *)0)->tags));
return SUCCESS;
}
int php_url_scanner_ex_deactivate(TSRMLS_D)
{
url_adapt_state_ex_t *ctx;
ctx = &BG(url_adapt_state_ex);
smart_str_free(&ctx->result);
smart_str_free(&ctx->buf);
smart_str_free(&ctx->tag);
smart_str_free(&ctx->arg);
return SUCCESS;
}
PHP_MINIT_FUNCTION(url_scanner)
{
url_adapt_state_ex_t *ctx;
ctx = &BG(url_adapt_state_ex);
ctx->tags = NULL;
REGISTER_INI_ENTRIES();
return SUCCESS;
}
PHP_MSHUTDOWN_FUNCTION(url_scanner)
{
UNREGISTER_INI_ENTRIES();
zend_hash_destroy(BG(url_adapt_state_ex).tags);
free(BG(url_adapt_state_ex).tags);
return SUCCESS;
}