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php-src/main/SAPI.c
Zeev Suraski bd0ac7fe14 Many patches. I hope I remember them all: 
- Make sapi_module available to external modules (PHPAPI)
- Make the php.ini path reported in phpinfo() always point to
  real full path of the php.ini file
- Optimized the ISAPI module not to read unnecessary server
  variables and read necessary variables at most once.
2001-01-02 22:49:31 +00:00

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/*
+----------------------------------------------------------------------+
| PHP version 4.0 |
+----------------------------------------------------------------------+
| Copyright (c) 1997, 1998, 1999, 2000 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. |
+----------------------------------------------------------------------+
| Original design: Shane Caraveo <shane@caraveo.com> |
| Authors: Andi Gutmans <andi@zend.com> |
| Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/
#include <ctype.h>
#include <sys/stat.h>
#include "php.h"
#include "SAPI.h"
#ifdef ZTS
#include "TSRM.h"
#endif
#include "rfc1867.h"
#ifdef PHP_WIN32
#define STRCASECMP stricmp
#else
#define STRCASECMP strcasecmp
#endif
#include "php_content_types.h"
static HashTable known_post_content_types;
SAPI_API void (*sapi_error)(int error_type, const char *message, ...);
#ifdef ZTS
SAPI_API int sapi_globals_id;
#else
sapi_globals_struct sapi_globals;
#endif
static void sapi_globals_ctor(sapi_globals_struct *sapi_globals)
{
memset(sapi_globals,0,sizeof(*sapi_globals));
}
/* True globals (no need for thread safety) */
SAPI_API sapi_module_struct sapi_module;
SAPI_API void (*sapi_error)(int error_type, const char *message, ...);
SAPI_API void sapi_startup(sapi_module_struct *sf)
{
sapi_module = *sf;
zend_hash_init_ex(&known_post_content_types, 5, NULL, NULL, 1, 0);
#ifdef ZTS
sapi_globals_id = ts_allocate_id(sizeof(sapi_globals_struct), (ts_allocate_ctor) sapi_globals_ctor, NULL);
#else
sapi_globals_ctor(&sapi_globals);
#endif
#ifdef VIRTUAL_DIR
virtual_cwd_startup(); /* Could use shutdown to free the main cwd but it would just slow it down for CGI */
#endif
reentrancy_startup();
php_global_startup_internal_extensions();
}
SAPI_API void sapi_shutdown(void)
{
reentrancy_shutdown();
#ifdef VIRTUAL_DIR
virtual_cwd_shutdown();
#endif
php_global_shutdown_internal_extensions();
zend_hash_destroy(&known_post_content_types);
}
SAPI_API void sapi_free_header(sapi_header_struct *sapi_header)
{
efree(sapi_header->header);
}
SAPI_API void sapi_handle_post(void *arg SLS_DC)
{
if (SG(request_info).post_entry) {
SG(request_info).post_entry->post_handler(SG(request_info).content_type_dup, arg SLS_CC);
if (SG(request_info).post_data) {
efree(SG(request_info).post_data);
SG(request_info).post_data = NULL;
}
efree(SG(request_info).content_type_dup);
SG(request_info).content_type_dup = NULL;
}
}
static void sapi_read_post_data(SLS_D)
{
sapi_post_entry *post_entry;
uint content_type_length = strlen(SG(request_info).content_type);
char *content_type = estrndup(SG(request_info).content_type, content_type_length);
char *p;
char oldchar=0;
void (*post_reader_func)(SLS_D);
/* dedicated implementation for increased performance:
* - Make the content type lowercase
* - Trim descriptive data, stay with the content-type only
*/
for (p=content_type; p<content_type+content_type_length; p++) {
switch (*p) {
case ';':
case ',':
case ' ':
content_type_length = p-content_type;
oldchar = *p;
*p = 0;
break;
default:
*p = tolower(*p);
break;
}
}
if (zend_hash_find(&known_post_content_types, content_type, content_type_length+1, (void **) &post_entry)==SUCCESS) {
SG(request_info).post_entry = post_entry;
post_reader_func = post_entry->post_reader;
} else {
if (!sapi_module.default_post_reader) {
sapi_module.sapi_error(E_WARNING, "Unsupported content type: '%s'", content_type);
return;
}
SG(request_info).post_entry = NULL;
post_reader_func = sapi_module.default_post_reader;
}
if (oldchar) {
*(p-1) = oldchar;
}
post_reader_func(SLS_C);
SG(request_info).content_type_dup = content_type;
}
SAPI_POST_READER_FUNC(sapi_read_standard_form_data)
{
int read_bytes;
int allocated_bytes=SAPI_POST_BLOCK_SIZE+1;
if (SG(request_info).content_length > SG(post_max_size)) {
php_error(E_WARNING, "POST Content-Length of %d bytes exceeds the limit of %d bytes",
SG(request_info).content_length, SG(post_max_size));
return;
}
SG(request_info).post_data = emalloc(allocated_bytes);
for (;;) {
read_bytes = sapi_module.read_post(SG(request_info).post_data+SG(read_post_bytes), SAPI_POST_BLOCK_SIZE SLS_CC);
if (read_bytes<=0) {
break;
}
SG(read_post_bytes) += read_bytes;
if (SG(read_post_bytes) > SG(post_max_size)) {
php_error(E_WARNING, "Actual POST length does not match Content-Length, and exceeds %d bytes", SG(post_max_size));
return;
}
if (read_bytes < SAPI_POST_BLOCK_SIZE) {
break;
}
if (SG(read_post_bytes)+SAPI_POST_BLOCK_SIZE >= allocated_bytes) {
allocated_bytes = SG(read_post_bytes)+SAPI_POST_BLOCK_SIZE+1;
SG(request_info).post_data = erealloc(SG(request_info).post_data, allocated_bytes);
}
}
SG(request_info).post_data[SG(read_post_bytes)] = 0; /* terminating NULL */
SG(request_info).post_data_length = SG(read_post_bytes);
}
SAPI_API char *sapi_get_default_content_type(SLS_D)
{
char *mimetype, *charset, *content_type;
mimetype = SG(default_mimetype) ? SG(default_mimetype) : SAPI_DEFAULT_MIMETYPE;
charset = SG(default_charset) ? SG(default_charset) : SAPI_DEFAULT_CHARSET;
if (strncasecmp(mimetype, "text/", 5) == 0 && *charset) {
int len = strlen(mimetype) + sizeof("; charset=") + strlen(charset);
content_type = emalloc(len);
snprintf(content_type, len, "%s; charset=%s", mimetype, charset);
} else {
content_type = estrdup(mimetype);
}
return content_type;
}
SAPI_API void sapi_get_default_content_type_header(sapi_header_struct *default_header SLS_DC)
{
char *default_content_type = sapi_get_default_content_type(SLS_C);
int default_content_type_len = strlen(default_content_type);
default_header->header_len = (sizeof("Content-type: ")-1) + default_content_type_len;
default_header->header = emalloc(default_header->header_len+1);
memcpy(default_header->header, "Content-type: ", sizeof("Content-type: "));
memcpy(default_header->header+sizeof("Content-type: ")-1, default_content_type, default_content_type_len);
default_header->header[default_header->header_len] = 0;
efree(default_content_type);
}
/*
* Add charset on content-type header if the MIME type starts with
* "text/", the default_charset directive is not empty and
* there is not already a charset option in there.
*
* If "mimetype" is non-NULL, it should point to a pointer allocated
* with emalloc(). If a charset is added, the string will be
* re-allocated and the new length is returned. If mimetype is
* unchanged, 0 is returned.
*
*/
SAPI_API size_t sapi_apply_default_charset(char **mimetype, size_t len SLS_DC)
{
char *charset, *newtype;
size_t newlen;
charset = SG(default_charset) ? SG(default_charset) : SAPI_DEFAULT_CHARSET;
if (*charset && strncmp(*mimetype, "text/", 5) == 0 && strstr(*mimetype, "charset=") == NULL) {
newlen = len + (sizeof(";charset=")-1) + strlen(charset);
newtype = emalloc(newlen + 1);
PHP_STRLCPY(newtype, *mimetype, newlen + 1, len);
strlcat(newtype, ";charset=", newlen + 1);
if (*mimetype != NULL) {
efree(*mimetype);
}
*mimetype = newtype;
return newlen;
}
return 0;
}
/*
* Called from php_request_startup() for every request.
*/
SAPI_API void sapi_activate(SLS_D)
{
zend_llist_init(&SG(sapi_headers).headers, sizeof(sapi_header_struct), (void (*)(void *)) sapi_free_header, 0);
SG(sapi_headers).send_default_content_type = 1;
/*
SG(sapi_headers).http_response_code = 200;
*/
SG(sapi_headers).http_status_line = NULL;
SG(headers_sent) = 0;
SG(read_post_bytes) = 0;
SG(request_info).post_data = NULL;
SG(request_info).current_user = NULL;
SG(request_info).current_user_length = 0;
SG(request_info).no_headers = 0;
/* It's possible to override this general case in the activate() callback, if
* necessary.
*/
if (SG(request_info).request_method && !strcmp(SG(request_info).request_method, "HEAD")) {
SG(request_info).headers_only = 1;
} else {
SG(request_info).headers_only = 0;
}
SG(rfc1867_uploaded_files) = NULL;
if (SG(server_context)) {
if (SG(request_info).request_method
&& !strcmp(SG(request_info).request_method, "POST")) {
if (!SG(request_info).content_type) {
sapi_module.sapi_error(E_WARNING, "No content-type in POST request");
SG(request_info).content_type_dup = NULL;
} else {
sapi_read_post_data(SLS_C);
}
} else {
SG(request_info).content_type_dup = NULL;
}
SG(request_info).cookie_data = sapi_module.read_cookies(SLS_C);
if (sapi_module.activate) {
sapi_module.activate(SLS_C);
}
}
}
SAPI_API void sapi_deactivate(SLS_D)
{
zend_llist_destroy(&SG(sapi_headers).headers);
if (SG(request_info).post_data) {
efree(SG(request_info).post_data);
}
if (SG(request_info).auth_user) {
efree(SG(request_info).auth_user);
}
if (SG(request_info).auth_password) {
efree(SG(request_info).auth_password);
}
if (SG(request_info).content_type_dup) {
efree(SG(request_info).content_type_dup);
}
if (SG(request_info).current_user) {
efree(SG(request_info).current_user);
}
if (sapi_module.deactivate) {
sapi_module.deactivate(SLS_C);
}
if (SG(rfc1867_uploaded_files)) {
destroy_uploaded_files_hash(SLS_C);
}
}
SAPI_API void sapi_initialize_empty_request(SLS_D)
{
SG(server_context) = NULL;
SG(request_info).request_method = NULL;
SG(request_info).auth_user = SG(request_info).auth_password = NULL;
SG(request_info).content_type_dup = NULL;
}
static int sapi_extract_response_code(const char *header_line)
{
int code = 200;
const char *ptr;
for (ptr = header_line; *ptr; ptr++) {
if (*ptr == ' ' && *(ptr + 1) != ' ') {
code = atoi(ptr + 1);
break;
}
}
return code;
}
/* This function expects a *duplicated* string, that was previously emalloc()'d.
* Pointers sent to this functions will be automatically freed by the framework.
*/
SAPI_API int sapi_add_header_ex(char *header_line, uint header_line_len, zend_bool duplicate, zend_bool replace)
{
int retval, free_header = 0;
sapi_header_struct sapi_header;
char *colon_offset;
SLS_FETCH();
if (SG(headers_sent) && !SG(request_info).no_headers) {
char *output_start_filename = php_get_output_start_filename();
int output_start_lineno = php_get_output_start_lineno();
if (output_start_filename) {
sapi_module.sapi_error(E_WARNING, "Cannot add header information - headers already sent by (output started at %s:%d)",
output_start_filename, output_start_lineno);
} else {
sapi_module.sapi_error(E_WARNING, "Cannot add header information - headers already sent");
}
if (!duplicate) {
efree(header_line);
}
return FAILURE;
}
if (duplicate) {
header_line = estrndup(header_line, header_line_len);
}
/* cut of trailing spaces, linefeeds and carriage-returns */
while(isspace(header_line[header_line_len-1]))
header_line[--header_line_len]='\0';
sapi_header.header = header_line;
sapi_header.header_len = header_line_len;
sapi_header.replace = replace;
/* Check the header for a few cases that we have special support for in SAPI */
if (header_line_len>=5
&& !strncasecmp(header_line, "HTTP/", 5)) {
/* filter out the response code */
SG(sapi_headers).http_response_code = sapi_extract_response_code(header_line);
SG(sapi_headers).http_status_line = header_line;
return SUCCESS;
} else {
colon_offset = strchr(header_line, ':');
if (colon_offset) {
*colon_offset = 0;
if (!STRCASECMP(header_line, "Content-Type")) {
char *ptr = colon_offset, *mimetype = NULL, *newheader;
size_t len = header_line_len - (ptr - header_line), newlen;
while (*ptr == ' ' && *ptr != '\0') {
ptr++;
}
mimetype = estrdup(ptr);
newlen = sapi_apply_default_charset(&mimetype, len SLS_CC);
if (newlen != 0) {
newlen += sizeof("Content-type: ");
newheader = emalloc(newlen);
PHP_STRLCPY(newheader, "Content-type: ", newlen, sizeof("Content-type: ")-1);
strlcat(newheader, mimetype, newlen);
sapi_header.header = newheader;
sapi_header.header_len = newlen - 1;
colon_offset = strchr(newheader, ':');
*colon_offset = '\0';
free_header = 1;
}
efree(mimetype);
SG(sapi_headers).send_default_content_type = 0;
} else if (!STRCASECMP(header_line, "Location")) {
if (SG(sapi_headers).http_response_code < 300 ||
SG(sapi_headers).http_response_code > 307) {
/* Return a Found Redirect if one is not already specified */
SG(sapi_headers).http_response_code = 302;
}
} else if (!STRCASECMP(header_line, "WWW-Authenticate")) { /* HTTP Authentication */
SG(sapi_headers).http_response_code = 401; /* authentication-required */
}
*colon_offset = ':';
}
}
if (sapi_module.header_handler) {
retval = sapi_module.header_handler(&sapi_header, &SG(sapi_headers) SLS_CC);
} else {
retval = SAPI_HEADER_ADD;
}
if (retval & SAPI_HEADER_DELETE_ALL) {
zend_llist_clean(&SG(sapi_headers).headers);
}
if (retval & SAPI_HEADER_ADD) {
zend_llist_add_element(&SG(sapi_headers).headers, (void *) &sapi_header);
}
if (free_header) {
efree(sapi_header.header);
}
return SUCCESS;
}
SAPI_API int sapi_send_headers()
{
int retval;
int ret = FAILURE;
SLS_FETCH();
if (SG(headers_sent) || SG(request_info).no_headers) {
return SUCCESS;
}
/* Success-oriented. We set headers_sent to 1 here to avoid an infinite loop
* in case of an error situation.
*/
SG(headers_sent) = 1;
if (sapi_module.send_headers) {
retval = sapi_module.send_headers(&SG(sapi_headers) SLS_CC);
} else {
retval = SAPI_HEADER_DO_SEND;
}
switch (retval) {
case SAPI_HEADER_SENT_SUCCESSFULLY:
ret = SUCCESS;
break;
case SAPI_HEADER_DO_SEND:
if (SG(sapi_headers).http_status_line) {
sapi_header_struct http_status_line;
http_status_line.header = SG(sapi_headers).http_status_line;
http_status_line.header_len = strlen(SG(sapi_headers).http_status_line);
sapi_module.send_header(&http_status_line, SG(server_context));
}
zend_llist_apply_with_argument(&SG(sapi_headers).headers, (void (*)(void *, void *)) sapi_module.send_header, SG(server_context));
if(SG(sapi_headers).send_default_content_type) {
sapi_header_struct default_header;
sapi_get_default_content_type_header(&default_header SLS_CC);
sapi_module.send_header(&default_header, SG(server_context));
sapi_free_header(&default_header);
}
sapi_module.send_header(NULL, SG(server_context));
ret = SUCCESS;
break;
case SAPI_HEADER_SEND_FAILED:
SG(headers_sent) = 0;
ret = FAILURE;
break;
}
if (SG(sapi_headers).http_status_line) {
efree(SG(sapi_headers).http_status_line);
}
return ret;
}
SAPI_API int sapi_register_post_entries(sapi_post_entry *post_entries)
{
sapi_post_entry *p=post_entries;
while (p->content_type) {
if (sapi_register_post_entry(p)==FAILURE) {
return FAILURE;
}
p++;
}
return SUCCESS;
}
SAPI_API int sapi_register_post_entry(sapi_post_entry *post_entry)
{
return zend_hash_add(&known_post_content_types, post_entry->content_type, post_entry->content_type_len+1, (void *) post_entry, sizeof(sapi_post_entry), NULL);
}
SAPI_API void sapi_unregister_post_entry(sapi_post_entry *post_entry)
{
zend_hash_del(&known_post_content_types, post_entry->content_type, post_entry->content_type_len+1);
}
SAPI_API int sapi_add_post_entry(char *content_type
, void (*post_reader)(SLS_D)
, void (*post_handler)(char *content_type_dup
, void *arg SLS_DC)) {
sapi_post_entry *post_entry = (sapi_post_entry *)malloc(sizeof(sapi_post_entry));
if(!post_entry) return 0;
post_entry->content_type = strdup(content_type);
if(post_entry->content_type == NULL) return 0;
post_entry->content_type_len = strlen(content_type);
post_entry->post_reader = post_reader;
post_entry->post_handler = post_handler;
return zend_hash_add(&known_post_content_types
, post_entry->content_type
, post_entry->content_type_len+1
, (void *) post_entry
, sizeof(sapi_post_entry)
, NULL
);
}
SAPI_API void sapi_remove_post_entry(char *content_type) {
sapi_post_entry *post_entry;
zend_hash_find(&known_post_content_types
,content_type
,strlen(content_type)+1
,(void **)&post_entry
);
if(post_entry != NULL) {
zend_hash_del(&known_post_content_types
,content_type
,strlen(content_type)+1
);
free(post_entry->content_type);
free(post_entry);
} else {
php_error(E_WARNING,"unregister post handler failed in fdf");
}
}
SAPI_API int sapi_register_default_post_reader(void (*default_post_reader)(SLS_D))
{
sapi_module.default_post_reader = default_post_reader;
return SUCCESS;
}
SAPI_API int sapi_flush()
{
if (sapi_module.flush) {
SLS_FETCH();
sapi_module.flush(SG(server_context));
return SUCCESS;
} else {
return FAILURE;
}
}
SAPI_API struct stat *sapi_get_stat()
{
SLS_FETCH();
if (sapi_module.get_stat) {
return sapi_module.get_stat(SLS_C);
} else {
if (!SG(request_info).path_translated || (V_STAT(SG(request_info).path_translated, &SG(global_stat))==-1)) {
return NULL;
}
return &SG(global_stat);
}
}
SAPI_API char *sapi_getenv(char *name, size_t name_len)
{
if (sapi_module.getenv) {
SLS_FETCH();
return sapi_module.getenv(name, name_len SLS_CC);
} else {
return NULL;
}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
*/
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