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|
/*
+----------------------------------------------------------------------+
| PHP HTML Embedded Scripting Language Version 3.0 |
+----------------------------------------------------------------------+
| Copyright (c) 1997,1998 PHP Development Team (See Credits file) |
+----------------------------------------------------------------------+
| This program is free software; you can redistribute it and/or modify |
| it under the terms of one of the following licenses: |
| |
| A) the GNU General Public License as published by the Free Software |
| Foundation; either version 2 of the License, or (at your option) |
| any later version. |
| |
| B) the PHP License as published by the PHP Development Team and |
| included in the distribution in the file: LICENSE |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of both licenses referred to here. |
| If you did not, or have any questions about PHP licensing, please |
| contact core@php.net. |
+----------------------------------------------------------------------+
| Authors: Rasmus Lerdorf |
| |
+----------------------------------------------------------------------+
*/
/* $Id: mime.c,v 1.52 1998/05/15 10:57:27 zeev Exp $ */
#ifdef THREAD_SAFE
#include "tls.h"
#endif
#include <stdio.h>
#include "php.h"
#include "internal_functions.h"
#include "type.h"
#include "post.h"
#include "mime.h"
#define NEW_BOUNDARY_CHECK 1
#define SAFE_RETURN { if (namebuf) efree(namebuf); if (filenamebuf) efree(filenamebuf); if (lbuf) efree(lbuf); return; }
/*
* Split raw mime stream up into appropriate components
*/
void php3_mime_split(char *buf, int cnt, char *boundary, pval *http_post_vars)
{
char *ptr, *loc, *loc2, *s, *name, *filename, *u, *fn;
int len, state = 0, Done = 0, rem, urem;
long bytes, max_file_size = 0;
char *namebuf=NULL, *filenamebuf=NULL, *lbuf=NULL;
FILE *fp;
int itype;
TLS_VARS;
ptr = buf;
rem = cnt;
len = strlen(boundary);
while ((ptr - buf < cnt) && !Done) {
switch (state) {
case 0: /* Looking for mime boundary */
loc = memchr(ptr, *boundary, cnt);
if (loc) {
if (!strncmp(loc, boundary, len)) {
state = 1;
rem -= (loc - ptr) + len + 2;
ptr = loc + len + 2;
} else {
rem -= (loc - ptr) + 1;
ptr = loc + 1;
}
} else {
Done = 1;
}
break;
case 1: /* Check content-disposition */
if (strncasecmp(ptr, "Content-Disposition: form-data;", 31)) {
if (rem < 31) {
SAFE_RETURN;
}
php3_error(E_WARNING, "File Upload Mime headers garbled [%c%c%c%c%c]", *ptr, *(ptr + 1), *(ptr + 2), *(ptr + 3), *(ptr + 4));
SAFE_RETURN;
}
loc = memchr(ptr, '\n', rem);
name = strstr(ptr, " name=\"");
if (name && name < loc) {
name += 7;
s = memchr(name, '\"', loc - name);
if (!s) {
php3_error(E_WARNING, "File Upload Mime headers garbled [%c%c%c%c%c]", *name, *(name + 1), *(name + 2), *(name + 3), *(name + 4));
SAFE_RETURN;
}
namebuf = estrndup(name, s-name);
lbuf = emalloc(s-name + MAX(MAX(sizeof("_name"),sizeof("_size")),sizeof("_type")));
state = 2;
loc2 = memchr(loc + 1, '\n', rem);
rem -= (loc2 - ptr) + 1;
ptr = loc2 + 1;
} else {
php3_error(E_WARNING, "File upload error - no name component in content disposition");
SAFE_RETURN;
}
filename = strstr(s, " filename=\"");
if (filename && filename < loc) {
filename += 11;
s = memchr(filename, '\"', loc - filename);
if (!s) {
php3_error(E_WARNING, "File Upload Mime headers garbled [%c%c%c%c%c]", *filename, *(filename + 1), *(filename + 2), *(filename + 3), *(filename + 4));
SAFE_RETURN;
}
filenamebuf = estrndup(filename, s-filename);
sprintf(lbuf, "%s_name", namebuf);
s = strrchr(filenamebuf, '\\');
if (s && s > filenamebuf) {
SET_VAR_STRING(lbuf, estrdup(s + 1));
} else {
SET_VAR_STRING(lbuf, estrdup(filenamebuf));
}
state = 3;
if ((loc2 - loc) > 2) {
if (!strncasecmp(loc + 1, "Content-Type:", 13)) {
*(loc2 - 1) = '\0';
sprintf(lbuf, "%s_type", namebuf);
SET_VAR_STRING(lbuf, estrdup(loc + 15));
*(loc2 - 1) = '\n';
}
rem -= 2;
ptr += 2;
}
}
break;
case 2: /* handle form-data fields */
loc = memchr(ptr, *boundary, rem);
u = ptr;
while (loc) {
if (!strncmp(loc, boundary, len))
break;
u = loc + 1;
urem = rem - (loc - ptr) - 1;
loc = memchr(u, *boundary, urem);
}
if (!loc) {
php3_error(E_WARNING, "File Upload Field Data garbled");
SAFE_RETURN;
}
*(loc - 4) = '\0';
/* Magic function that figures everything out */
_php3_parse_gpc_data(ptr,namebuf,http_post_vars);
/* And a little kludge to pick out special MAX_FILE_SIZE */
itype = php3_check_ident_type(namebuf);
if (itype) {
u = strchr(namebuf, '[');
if (u)
*u = '\0';
}
if (!strcmp(namebuf, "MAX_FILE_SIZE")) {
max_file_size = atol(ptr);
}
if (itype) {
if (u)
*u = '[';
}
rem -= (loc - ptr);
ptr = loc;
state = 0;
break;
case 3: /* Handle file */
loc = memchr(ptr, *boundary, rem);
u = ptr;
while (loc) {
if (!strncmp(loc, boundary, len)
#if NEW_BOUNDARY_CHECK
&& (loc-2>buf && *(loc-2)=='-' && *(loc-1)=='-') /* ensure boundary is prefixed with -- */
&& (loc-2==buf || *(loc-3)=='\n') /* ensure beginning of line */
#endif
) {
break;
}
u = loc + 1;
urem = rem - (loc - ptr) - 1;
loc = memchr(u, *boundary, urem);
}
if (!loc) {
php3_error(E_WARNING, "File Upload Error - No Mime boundary found after start of file header");
SAFE_RETURN;
}
fn = tempnam(php3_ini.upload_tmp_dir, "php");
if (max_file_size && ((loc - ptr - 4) > max_file_size)) {
php3_error(E_WARNING, "Max file size exceeded - file [%s] not saved", namebuf);
bytes = 0;
SET_VAR_STRING(namebuf, estrdup("none"));
} else if ((loc - ptr - 4) <= 0) {
bytes = 0;
SET_VAR_STRING(namebuf, estrdup("none"));
} else {
fp = fopen(fn, "w");
if (!fp) {
php3_error(E_WARNING, "File Upload Error - Unable to open temporary file [%s]", fn);
SAFE_RETURN;
}
bytes = fwrite(ptr, 1, loc - ptr - 4, fp);
fclose(fp);
if (bytes < (loc - ptr - 4)) {
php3_error(E_WARNING, "Only %d bytes were written, expected to write %ld", bytes, loc - ptr - 4);
}
SET_VAR_STRING(namebuf, estrdup(fn));
}
sprintf(lbuf, "%s_size", namebuf);
SET_VAR_LONG(lbuf, bytes);
state = 0;
rem -= (loc - ptr);
ptr = loc;
break;
}
}
SAFE_RETURN;
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
*/
|
