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php-src/main/SAPI.h
Jakub Zelenka 3503b1daa2
Fix bug #77780: "Headers already sent" when previous connection was aborted 
This change primarily splits SAPI deactivation to module and destroy
parts. The reason is that currently some SAPIs might bail out
on deactivation. One of those SAPI is PHP-FPM that can bail out on
request end if for example the connection is closed by the client
(web sever). The problem is that in such case the resources are not
freed and some values reset. The most visible impact can have not
resetting the PG(headers_sent) which can cause erorrs in the next
request. One such issue is described in #77780 bug which this fixes
and is also cover by a test in this commit. It seems reasonable
to separate deactivation and destroying of the resource which means
that the bail out will not impact it.
2022-08-29 22:25:53 +01:00

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/*
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.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: Zeev Suraski <zeev@php.net> |
+----------------------------------------------------------------------+
*/
#ifndef SAPI_H
#define SAPI_H
#include "php.h"
#include "zend.h"
#include "zend_API.h"
#include "zend_llist.h"
#include "zend_operators.h"
#include <sys/stat.h>
#define SAPI_OPTION_NO_CHDIR 1
#define SAPI_POST_BLOCK_SIZE 0x4000
#ifdef PHP_WIN32
# ifdef SAPI_EXPORTS
# define SAPI_API __declspec(dllexport)
# else
# define SAPI_API __declspec(dllimport)
# endif
#elif defined(__GNUC__) && __GNUC__ >= 4
# define SAPI_API __attribute__ ((visibility("default")))
#else
# define SAPI_API
#endif
#undef shutdown
typedef struct {
char *header;
size_t header_len;
} sapi_header_struct;
typedef struct {
zend_llist headers;
int http_response_code;
unsigned char send_default_content_type;
char *mimetype;
char *http_status_line;
} sapi_headers_struct;
typedef struct _sapi_post_entry sapi_post_entry;
typedef struct _sapi_module_struct sapi_module_struct;
BEGIN_EXTERN_C()
extern SAPI_API sapi_module_struct sapi_module; /* true global */
END_EXTERN_C()
/* Some values in this structure needs to be filled in before
* calling sapi_activate(). We WILL change the `char *' entries,
* so make sure that you allocate a separate buffer for them
* and that you free them after sapi_deactivate().
*/
typedef struct {
const char *request_method;
char *query_string;
char *cookie_data;
zend_long content_length;
char *path_translated;
char *request_uri;
/* Do not use request_body directly, but the php://input stream wrapper instead */
struct _php_stream *request_body;
const char *content_type;
zend_bool headers_only;
zend_bool no_headers;
zend_bool headers_read;
sapi_post_entry *post_entry;
char *content_type_dup;
/* for HTTP authentication */
char *auth_user;
char *auth_password;
char *auth_digest;
/* this is necessary for the CGI SAPI module */
char *argv0;
char *current_user;
int current_user_length;
/* this is necessary for CLI module */
int argc;
char **argv;
int proto_num;
} sapi_request_info;
typedef struct _sapi_globals_struct {
void *server_context;
sapi_request_info request_info;
sapi_headers_struct sapi_headers;
int64_t read_post_bytes;
unsigned char post_read;
unsigned char headers_sent;
zend_stat_t global_stat;
char *default_mimetype;
char *default_charset;
HashTable *rfc1867_uploaded_files;
zend_long post_max_size;
int options;
zend_bool sapi_started;
double global_request_time;
HashTable known_post_content_types;
zval callback_func;
zend_fcall_info_cache fci_cache;
} sapi_globals_struct;
BEGIN_EXTERN_C()
#ifdef ZTS
# define SG(v) ZEND_TSRMG_FAST(sapi_globals_offset, sapi_globals_struct *, v)
SAPI_API extern int sapi_globals_id;
SAPI_API extern size_t sapi_globals_offset;
#else
# define SG(v) (sapi_globals.v)
extern SAPI_API sapi_globals_struct sapi_globals;
#endif
SAPI_API void sapi_startup(sapi_module_struct *sf);
SAPI_API void sapi_shutdown(void);
SAPI_API void sapi_activate(void);
SAPI_API void sapi_deactivate_module(void);
SAPI_API void sapi_deactivate_destroy(void);
SAPI_API void sapi_deactivate(void);
SAPI_API void sapi_initialize_empty_request(void);
SAPI_API void sapi_add_request_header(const char *var, unsigned int var_len, char *val, unsigned int val_len, void *arg);
END_EXTERN_C()
/*
* This is the preferred and maintained API for
* operating on HTTP headers.
*/
/*
* Always specify a sapi_header_line this way:
*
* sapi_header_line ctr = {0};
*/
typedef struct {
const char *line; /* If you allocated this, you need to free it yourself */
size_t line_len;
zend_long response_code; /* long due to zend_parse_parameters compatibility */
} sapi_header_line;
typedef enum { /* Parameter: */
SAPI_HEADER_REPLACE, /* sapi_header_line* */
SAPI_HEADER_ADD, /* sapi_header_line* */
SAPI_HEADER_DELETE, /* sapi_header_line* */
SAPI_HEADER_DELETE_ALL, /* void */
SAPI_HEADER_SET_STATUS /* int */
} sapi_header_op_enum;
BEGIN_EXTERN_C()
SAPI_API int sapi_header_op(sapi_header_op_enum op, void *arg);
/* Deprecated functions. Use sapi_header_op instead. */
SAPI_API int sapi_add_header_ex(const char *header_line, size_t header_line_len, zend_bool duplicate, zend_bool replace);
#define sapi_add_header(a, b, c) sapi_add_header_ex((a),(b),(c),1)
SAPI_API int sapi_send_headers(void);
SAPI_API void sapi_free_header(sapi_header_struct *sapi_header);
SAPI_API void sapi_handle_post(void *arg);
SAPI_API size_t sapi_read_post_block(char *buffer, size_t buflen);
SAPI_API int sapi_register_post_entries(const sapi_post_entry *post_entry);
SAPI_API int sapi_register_post_entry(const sapi_post_entry *post_entry);
SAPI_API void sapi_unregister_post_entry(const sapi_post_entry *post_entry);
SAPI_API int sapi_register_default_post_reader(void (*default_post_reader)(void));
SAPI_API int sapi_register_treat_data(void (*treat_data)(int arg, char *str, zval *destArray));
SAPI_API int sapi_register_input_filter(unsigned int (*input_filter)(int arg, const char *var, char **val, size_t val_len, size_t *new_val_len), unsigned int (*input_filter_init)(void));
SAPI_API int sapi_flush(void);
SAPI_API zend_stat_t *sapi_get_stat(void);
SAPI_API char *sapi_getenv(const char *name, size_t name_len);
SAPI_API char *sapi_get_default_content_type(void);
SAPI_API void sapi_get_default_content_type_header(sapi_header_struct *default_header);
SAPI_API size_t sapi_apply_default_charset(char **mimetype, size_t len);
SAPI_API void sapi_activate_headers_only(void);
SAPI_API int sapi_get_fd(int *fd);
SAPI_API int sapi_force_http_10(void);
SAPI_API int sapi_get_target_uid(uid_t *);
SAPI_API int sapi_get_target_gid(gid_t *);
SAPI_API double sapi_get_request_time(void);
SAPI_API void sapi_terminate_process(void);
END_EXTERN_C()
struct _sapi_module_struct {
char *name;
char *pretty_name;
int (*startup)(struct _sapi_module_struct *sapi_module);
int (*shutdown)(struct _sapi_module_struct *sapi_module);
int (*activate)(void);
int (*deactivate)(void);
size_t (*ub_write)(const char *str, size_t str_length);
void (*flush)(void *server_context);
zend_stat_t *(*get_stat)(void);
char *(*getenv)(const char *name, size_t name_len);
void (*sapi_error)(int type, const char *error_msg, ...) ZEND_ATTRIBUTE_FORMAT(printf, 2, 3);
int (*header_handler)(sapi_header_struct *sapi_header, sapi_header_op_enum op, sapi_headers_struct *sapi_headers);
int (*send_headers)(sapi_headers_struct *sapi_headers);
void (*send_header)(sapi_header_struct *sapi_header, void *server_context);
size_t (*read_post)(char *buffer, size_t count_bytes);
char *(*read_cookies)(void);
void (*register_server_variables)(zval *track_vars_array);
void (*log_message)(const char *message, int syslog_type_int);
double (*get_request_time)(void);
void (*terminate_process)(void);
char *php_ini_path_override;
void (*default_post_reader)(void);
void (*treat_data)(int arg, char *str, zval *destArray);
char *executable_location;
int php_ini_ignore;
int php_ini_ignore_cwd; /* don't look for php.ini in the current directory */
int (*get_fd)(int *fd);
int (*force_http_10)(void);
int (*get_target_uid)(uid_t *);
int (*get_target_gid)(gid_t *);
unsigned int (*input_filter)(int arg, const char *var, char **val, size_t val_len, size_t *new_val_len);
void (*ini_defaults)(HashTable *configuration_hash);
int phpinfo_as_text;
char *ini_entries;
const zend_function_entry *additional_functions;
unsigned int (*input_filter_init)(void);
};
struct _sapi_post_entry {
char *content_type;
uint32_t content_type_len;
void (*post_reader)(void);
void (*post_handler)(char *content_type_dup, void *arg);
};
/* header_handler() constants */
#define SAPI_HEADER_ADD (1<<0)
#define SAPI_HEADER_SENT_SUCCESSFULLY 1
#define SAPI_HEADER_DO_SEND 2
#define SAPI_HEADER_SEND_FAILED 3
#define SAPI_DEFAULT_MIMETYPE "text/html"
#define SAPI_DEFAULT_CHARSET PHP_DEFAULT_CHARSET
#define SAPI_PHP_VERSION_HEADER "X-Powered-By: PHP/" PHP_VERSION
#define SAPI_POST_READER_FUNC(post_reader) void post_reader(void)
#define SAPI_POST_HANDLER_FUNC(post_handler) void post_handler(char *content_type_dup, void *arg)
#define SAPI_TREAT_DATA_FUNC(treat_data) void treat_data(int arg, char *str, zval* destArray)
#define SAPI_INPUT_FILTER_FUNC(input_filter) unsigned int input_filter(int arg, const char *var, char **val, size_t val_len, size_t *new_val_len)
BEGIN_EXTERN_C()
SAPI_API SAPI_POST_READER_FUNC(sapi_read_standard_form_data);
SAPI_API SAPI_POST_READER_FUNC(php_default_post_reader);
SAPI_API SAPI_TREAT_DATA_FUNC(php_default_treat_data);
SAPI_API SAPI_INPUT_FILTER_FUNC(php_default_input_filter);
END_EXTERN_C()
#define STANDARD_SAPI_MODULE_PROPERTIES \
NULL, /* php_ini_path_override */ \
NULL, /* default_post_reader */ \
NULL, /* treat_data */ \
NULL, /* executable_location */ \
0, /* php_ini_ignore */ \
0, /* php_ini_ignore_cwd */ \
NULL, /* get_fd */ \
NULL, /* force_http_10 */ \
NULL, /* get_target_uid */ \
NULL, /* get_target_gid */ \
NULL, /* input_filter */ \
NULL, /* ini_defaults */ \
0, /* phpinfo_as_text; */ \
NULL, /* ini_entries; */ \
NULL, /* additional_functions */ \
NULL /* input_filter_init */
#endif /* SAPI_H */
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