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url_scanner.c
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/
url_scanner.c
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/*
+----------------------------------------------------------------------+
| PHP version 4.0 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2001 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. |
+----------------------------------------------------------------------+
| Author: Hartmut Holzgraefe <hartmut@six.de> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "php.h"
#ifdef TRANS_SID
#include "php_globals.h"
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "basic_functions.h"
#include "url_scanner.h"
#ifndef BUFSIZE
#define BUFSIZE 256
#endif
PHP_RINIT_FUNCTION(url_scanner)
{
url_adapt(NULL,0,NULL,NULL);
return SUCCESS;
}
PHP_RSHUTDOWN_FUNCTION(url_scanner)
{
url_adapt(NULL,0,NULL,NULL);
return SUCCESS;
}
static char *url_attr_addon(const char *tag,const char *attr,const char *val,const char *buf)
{
int flag = 0;
PLS_FETCH();
if(!strcasecmp(tag,"a") && !strcasecmp(attr,"href")) {
flag = 1;
} else if(!strcasecmp(tag,"area" ) && !strcasecmp(attr,"href" )) {
flag = 1;
} else if(!strcasecmp(tag,"form" ) && !strcasecmp(attr,"action" )) {
flag = 1;
} else if(!strcasecmp(tag,"frame") && !strcasecmp(attr,"source" )) {
flag = 1;
} else if(!strcasecmp(tag,"img" ) && !strcasecmp(attr,"action" )) {
flag = 1;
}
if(flag) {
if(!strstr(val,buf)&&!strchr(val,':'))
{
char *result = (char *)emalloc(strlen(buf)+strlen(PG(arg_separator).output)+1);
int n;
if(strchr(val,'?')) {
strcpy(result,PG(arg_separator).output);
n=strlen(PG(arg_separator).output);
} else {
*result='?';
n=1;
}
strcpy(result+n,buf);
return result;
}
}
return NULL;
}
#define US BG(url_adapt_state)
char *url_adapt_ext(const char *src, size_t srclen, const char *name, const char *val, size_t *newlen)
{
char buf[1024];
snprintf(buf, sizeof(buf)-1, "%s=%s", name, val);
return url_adapt(src, srclen, buf, newlen);
}
char *url_adapt(const char *src, size_t srclen, const char *data, size_t *newlen)
{
char *out,*outp;
int maxl,n;
BLS_FETCH();
if(src==NULL) {
US.state=STATE_NORMAL;
if(US.tag) { efree(US.tag); US.tag =NULL; }
if(US.attr) { efree(US.attr); US.attr=NULL; }
if(US.val) { efree(US.val); US.val =NULL; }
return NULL;
}
if(srclen==0)
srclen=strlen(src);
out=malloc(srclen+1);
maxl=srclen;
n=srclen;
*newlen=0;
outp=out;
while(n--) {
switch(US.state) {
case STATE_NORMAL:
if(*src=='<')
US.state=STATE_TAG_START;
break;
case STATE_TAG_START:
if(! isalnum(*src))
US.state=STATE_NORMAL;
US.state=STATE_TAG;
US.ml=BUFSIZE;
US.p=US.tag=erealloc(US.tag,US.ml);
*(US.p)++=*src;
US.l=1;
break;
case STATE_TAG:
if(isalnum(*src)) {
*(US.p)++ = *src;
US.l++;
if(US.l==US.ml) {
US.ml+=BUFSIZE;
US.tag=erealloc(US.tag,US.ml);
US.p = US.tag+US.l;
}
} else if (isspace(*src)) {
US.state = STATE_IN_TAG;
*US.p='\0';
US.tag=erealloc(US.tag,US.l);
} else {
US.state = STATE_NORMAL;
efree(US.tag);
US.tag=NULL;
}
break;
case STATE_IN_TAG:
if(isalnum(*src)) {
US.state=STATE_TAG_ATTR;
US.ml=BUFSIZE;
US.p=US.attr=erealloc(US.attr,US.ml);
*(US.p)++=*src;
US.l=1;
} else if (! isspace(*src)) {
US.state = STATE_NORMAL;
efree(US.tag);
US.tag=NULL;
}
break;
case STATE_TAG_ATTR:
if(isalnum(*src)) {
*US.p++=*src;
++US.l;
if(US.l==US.ml) {
US.ml+=BUFSIZE;
US.attr=erealloc(US.attr,US.ml);
US.p = US.attr+US.l;
}
if(US.l==US.ml) {
US.ml+=BUFSIZE;
US.attr=erealloc(US.attr,US.ml);
US.p = US.attr+US.l;
}
} else if(isspace(*src)||(*src=='=')){
US.state=STATE_TAG_IS;
*US.p=0;
US.attr=erealloc(US.attr,US.l);
} else if(*src=='>') {
US.state=STATE_NORMAL;
} else {
efree(US.attr);
US.attr=NULL;
US.state=STATE_IN_TAG;
}
break;
case STATE_TAG_IS:
case STATE_TAG_IS2:
if(*src=='>'){
US.state=STATE_NORMAL;
if(! (US.attr_done)) {
char *p;
p=url_attr_addon(US.tag,US.attr,"",data);
if(p) {
int l= strlen(p);
maxl+=l;
out=realloc(out,maxl);
outp=out+*newlen;
strcpy(outp,p);
outp+=l;
*newlen+=l;
efree(p);
}
}
} else if(*src=='#') {
if(! (US.attr_done)) {
char *p;
US.attr_done=1;
p=url_attr_addon(US.tag,US.attr,"#",data);
if(p) {
int l= strlen(p);
maxl+=l;
out=realloc(out,maxl);
outp=out+*newlen;
strcpy(outp,p);
outp+=l;
*newlen+=l;
efree(p);
}
}
} else if(!isspace(*src)&&(*src!='=')) {
US.ml=BUFSIZE;
US.p=US.val=erealloc(US.val,US.ml);
US.l=0;
US.attr_done=0;
if((*src=='"')||(*src=='\'')) {
US.state=STATE_TAG_QVAL2;
US.delim=*src;
} else {
US.state=STATE_TAG_VAL;
*US.p++=*src;
US.l++;
}
}
break;
case STATE_TAG_QVAL2:
if(*src=='#') {
if(! (US.attr_done)) {
char *p;
US.attr_done=1;
*US.p='\0';
p=url_attr_addon(US.tag,US.attr,US.val,data);
if(p) {
int l= strlen(p);
maxl+=l;
out=realloc(out,maxl);
outp=out+*newlen;
strcpy(outp,p);
outp+=l;
*newlen+=l;
efree(p);
}
}
} else if(*src==US.delim) {
US.state=STATE_IN_TAG;
*US.p='\0';
if(! (US.attr_done)) {
char *p;
p=url_attr_addon(US.tag,US.attr,US.val,data);
if(p) {
int l= strlen(p);
maxl+=l;
out=realloc(out,maxl);
outp=out+*newlen;
strcpy(outp,p);
outp+=l;
*newlen+=l;
efree(p);
}
}
break;
} else if(*src=='\\') {
US.state=STATE_TAG_QVAL2b;
} else if (*src=='>') {
US.state=STATE_NORMAL;
}
*US.p++=*src;
++US.l;
if(US.l==US.ml) {
US.ml+=BUFSIZE;
US.val=erealloc(US.val,US.ml);
US.p = US.val+US.l;
}
break;
case STATE_TAG_QVAL2b:
US.state=STATE_TAG_QVAL2;
*US.p++=*src;
++US.l;
if(US.l==US.ml) {
US.ml+=BUFSIZE;
US.val=erealloc(US.val,US.ml);
US.p = US.val+US.l;
}
break;
case STATE_TAG_VAL:
case STATE_TAG_VAL2:
if(*src=='#') {
if(! (US.attr_done)) {
char *p;
US.attr_done=1;
*US.p='\0';
p=url_attr_addon(US.tag,US.attr,US.val,data);
if(p) {
int l= strlen(p);
maxl+=l;
out=realloc(out,maxl);
outp=out+*newlen;
strcpy(outp,p);
outp+=l;
*newlen+=l;
efree(p);
}
}
} else if(isspace(*src)||(*src=='>')) {
US.state=(*src=='>')?STATE_NORMAL:STATE_IN_TAG;
*US.p='\0';
if(! (US.attr_done)) {
char *p;
p=url_attr_addon(US.tag,US.attr,US.val,data);
if(p) {
int l= strlen(p);
maxl+=l;
out=realloc(out,maxl);
outp=out+*newlen;
strcpy(outp,p);
outp+=l;
*newlen+=l;
efree(p);
}
}
} else {
*US.p++=*src;
US.l++;
if(US.l==US.ml) {
US.ml+=BUFSIZE;
US.val=erealloc(US.val,US.ml);
US.p = US.val+US.l;
}
}
break;
}
*outp++=*src++;
*newlen+=1;
}
*outp='\0';
return out;
}
#endif