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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2012 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: Sascha Schumann <sascha@schumann.cx> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "php.h"
#include "SAPI.h"
#include "php_main.h"
#include "php_thttpd.h"
#include "php_variables.h"
#include "version.h"
#include "php_ini.h"
#include "zend_highlight.h"
#include "ext/standard/php_smart_str.h"
#include <sys/time.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <stdlib.h>
#include <unistd.h>
#ifdef HAVE_GETNAMEINFO
#include <sys/socket.h>
#include <netdb.h>
#endif
typedef struct {
httpd_conn *hc;
void (*on_close)(int);
size_t unconsumed_length;
smart_str sbuf;
int seen_cl;
int seen_cn;
} php_thttpd_globals;
#define PHP_SYS_CALL(x) do { x } while (n == -1 && errno == EINTR)
#ifdef PREMIUM_THTTPD
# define do_keep_alive persistent
#endif
#ifdef ZTS
static int thttpd_globals_id;
#define TG(v) TSRMG(thttpd_globals_id, php_thttpd_globals *, v)
#else
static php_thttpd_globals thttpd_globals;
#define TG(v) (thttpd_globals.v)
#endif
static int sapi_thttpd_ub_write(const char *str, uint str_length TSRMLS_DC)
{
int n;
uint sent = 0;
if (TG(sbuf).c != 0) {
smart_str_appendl_ex(&TG(sbuf), str, str_length, 1);
return str_length;
}
while (str_length > 0) {
PHP_SYS_CALL(n = send(TG(hc)->conn_fd, str, str_length, 0););
if (n == -1) {
if (errno == EAGAIN) {
smart_str_appendl_ex(&TG(sbuf), str, str_length, 1);
return sent + str_length;
} else
php_handle_aborted_connection();
}
TG(hc)->bytes_sent += n;
str += n;
sent += n;
str_length -= n;
}
return sent;
}
#define COMBINE_HEADERS 64
#if defined(IOV_MAX)
# if IOV_MAX - 64 <= 0
# define SERIALIZE_HEADERS
# endif
#endif
static int do_writev(struct iovec *vec, int nvec, int len TSRMLS_DC)
{
int n;
assert(nvec <= IOV_MAX);
if (TG(sbuf).c == 0) {
PHP_SYS_CALL(n = writev(TG(hc)->conn_fd, vec, nvec););
if (n == -1) {
if (errno == EAGAIN) {
n = 0;
} else {
php_handle_aborted_connection();
}
}
TG(hc)->bytes_sent += n;
} else {
n = 0;
}
if (n < len) {
int i;
/* merge all unwritten data into sbuf */
for (i = 0; i < nvec; vec++, i++) {
/* has this vector been written completely? */
if (n >= vec->iov_len) {
/* yes, proceed */
n -= vec->iov_len;
continue;
}
if (n > 0) {
/* adjust vector */
vec->iov_base = (char *) vec->iov_base + n;
vec->iov_len -= n;
n = 0;
}
smart_str_appendl_ex(&TG(sbuf), vec->iov_base, vec->iov_len, 1);
}
}
return 0;
}
#ifdef SERIALIZE_HEADERS
# define ADD_VEC(str,l) smart_str_appendl(&vec_str, (str), (l))
# define VEC_BASE() smart_str vec_str = {0}
# define VEC_FREE() smart_str_free(&vec_str)
#else
# define ADD_VEC(str,l) vec[n].iov_base=str;len += (vec[n].iov_len=l); n++
# define VEC_BASE() struct iovec vec[COMBINE_HEADERS]
# define VEC_FREE() do {} while (0)
#endif
#define ADD_VEC_S(str) ADD_VEC((str), sizeof(str)-1)
#define CL_TOKEN "Content-length: "
#define CN_TOKEN "Connection: "
#define KA_DO "Connection: keep-alive\r\n"
#define KA_NO "Connection: close\r\n"
#define DEF_CT "Content-Type: text/html\r\n"
static int sapi_thttpd_send_headers(sapi_headers_struct *sapi_headers TSRMLS_DC)
{
char buf[1024], *p;
VEC_BASE();
int n = 0;
zend_llist_position pos;
sapi_header_struct *h;
size_t len = 0;
if (!SG(sapi_headers).http_status_line) {
ADD_VEC_S("HTTP/1.1 ");
p = smart_str_print_long(buf+sizeof(buf)-1,
SG(sapi_headers).http_response_code);
ADD_VEC(p, strlen(p));
ADD_VEC_S(" HTTP\r\n");
} else {
ADD_VEC(SG(sapi_headers).http_status_line,
strlen(SG(sapi_headers).http_status_line));
ADD_VEC("\r\n", 2);
}
TG(hc)->status = SG(sapi_headers).http_response_code;
if (SG(sapi_headers).send_default_content_type) {
ADD_VEC(DEF_CT, strlen(DEF_CT));
}
h = zend_llist_get_first_ex(&sapi_headers->headers, &pos);
while (h) {
switch (h->header[0]) {
case 'c': case 'C':
if (!TG(seen_cl) && strncasecmp(h->header, CL_TOKEN, sizeof(CL_TOKEN)-1) == 0) {
TG(seen_cl) = 1;
} else if (!TG(seen_cn) && strncasecmp(h->header, CN_TOKEN, sizeof(CN_TOKEN)-1) == 0) {
TG(seen_cn) = 1;
}
}
ADD_VEC(h->header, h->header_len);
#ifndef SERIALIZE_HEADERS
if (n >= COMBINE_HEADERS - 1) {
len = do_writev(vec, n, len TSRMLS_CC);
n = 0;
}
#endif
ADD_VEC("\r\n", 2);
h = zend_llist_get_next_ex(&sapi_headers->headers, &pos);
}
if (TG(seen_cl) && !TG(seen_cn) && TG(hc)->do_keep_alive) {
ADD_VEC(KA_DO, sizeof(KA_DO)-1);
} else {
TG(hc)->do_keep_alive = 0;
ADD_VEC(KA_NO, sizeof(KA_NO)-1);
}
ADD_VEC("\r\n", 2);
#ifdef SERIALIZE_HEADERS
sapi_thttpd_ub_write(vec_str.c, vec_str.len TSRMLS_CC);
#else
do_writev(vec, n, len TSRMLS_CC);
#endif
VEC_FREE();
return SAPI_HEADER_SENT_SUCCESSFULLY;
}
/* to understand this, read cgi_interpose_input() in libhttpd.c */
#define SIZEOF_UNCONSUMED_BYTES() (TG(hc)->read_idx - TG(hc)->checked_idx)
#define CONSUME_BYTES(n) do { TG(hc)->checked_idx += (n); } while (0)
static int sapi_thttpd_read_post(char *buffer, uint count_bytes TSRMLS_DC)
{
size_t read_bytes = 0;
if (TG(unconsumed_length) > 0) {
read_bytes = MIN(TG(unconsumed_length), count_bytes);
memcpy(buffer, TG(hc)->read_buf + TG(hc)->checked_idx, read_bytes);
TG(unconsumed_length) -= read_bytes;
CONSUME_BYTES(read_bytes);
}
return read_bytes;
}
static char *sapi_thttpd_read_cookies(TSRMLS_D)
{
return TG(hc)->cookie;
}
#define BUF_SIZE 512
#define ADD_STRING_EX(name,buf) \
php_register_variable(name, buf, track_vars_array TSRMLS_CC)
#define ADD_STRING(name) ADD_STRING_EX((name), buf)
static void sapi_thttpd_register_variables(zval *track_vars_array TSRMLS_DC)
{
char buf[BUF_SIZE + 1];
char *p;
php_register_variable("PHP_SELF", SG(request_info).request_uri, track_vars_array TSRMLS_CC);
php_register_variable("SERVER_SOFTWARE", SERVER_SOFTWARE, track_vars_array TSRMLS_CC);
php_register_variable("GATEWAY_INTERFACE", "CGI/1.1", track_vars_array TSRMLS_CC);
php_register_variable("REQUEST_METHOD", (char *) SG(request_info).request_method, track_vars_array TSRMLS_CC);
php_register_variable("REQUEST_URI", SG(request_info).request_uri, track_vars_array TSRMLS_CC);
php_register_variable("PATH_TRANSLATED", SG(request_info).path_translated, track_vars_array TSRMLS_CC);
if (TG(hc)->one_one) {
php_register_variable("SERVER_PROTOCOL", "HTTP/1.1", track_vars_array TSRMLS_CC);
} else {
php_register_variable("SERVER_PROTOCOL", "HTTP/1.0", track_vars_array TSRMLS_CC);
}
p = httpd_ntoa(&TG(hc)->client_addr);
ADD_STRING_EX("REMOTE_ADDR", p);
ADD_STRING_EX("REMOTE_HOST", p);
ADD_STRING_EX("SERVER_PORT",
smart_str_print_long(buf + sizeof(buf) - 1,
TG(hc)->hs->port));
buf[0] = '/';
memcpy(buf + 1, TG(hc)->pathinfo, strlen(TG(hc)->pathinfo) + 1);
ADD_STRING("PATH_INFO");
buf[0] = '/';
memcpy(buf + 1, TG(hc)->origfilename, strlen(TG(hc)->origfilename) + 1);
ADD_STRING("SCRIPT_NAME");
#define CONDADD(name, field) \
if (TG(hc)->field[0]) { \
php_register_variable(#name, TG(hc)->field, track_vars_array TSRMLS_CC); \
}
CONDADD(QUERY_STRING, query);
CONDADD(HTTP_HOST, hdrhost);
CONDADD(HTTP_REFERER, referer);
CONDADD(HTTP_USER_AGENT, useragent);
CONDADD(HTTP_ACCEPT, accept);
CONDADD(HTTP_ACCEPT_LANGUAGE, acceptl);
CONDADD(HTTP_ACCEPT_ENCODING, accepte);
CONDADD(HTTP_COOKIE, cookie);
CONDADD(CONTENT_TYPE, contenttype);
CONDADD(REMOTE_USER, remoteuser);
CONDADD(SERVER_PROTOCOL, protocol);
if (TG(hc)->contentlength != -1) {
ADD_STRING_EX("CONTENT_LENGTH",
smart_str_print_long(buf + sizeof(buf) - 1,
TG(hc)->contentlength));
}
if (TG(hc)->authorization[0])
php_register_variable("AUTH_TYPE", "Basic", track_vars_array TSRMLS_CC);
}
static PHP_MINIT_FUNCTION(thttpd)
{
return SUCCESS;
}
static zend_module_entry php_thttpd_module = {
STANDARD_MODULE_HEADER,
"thttpd",
NULL,
PHP_MINIT(thttpd),
NULL,
NULL,
NULL,
NULL, /* info */
NULL,
STANDARD_MODULE_PROPERTIES
};
static int php_thttpd_startup(sapi_module_struct *sapi_module)
{
#if PHP_API_VERSION >= 20020918
if (php_module_startup(sapi_module, &php_thttpd_module, 1) == FAILURE) {
#else
if (php_module_startup(sapi_module) == FAILURE
|| zend_startup_module(&php_thttpd_module) == FAILURE) {
#endif
return FAILURE;
}
return SUCCESS;
}
static int sapi_thttpd_get_fd(int *nfd TSRMLS_DC)
{
if (nfd) *nfd = TG(hc)->conn_fd;
return SUCCESS;
}
static sapi_module_struct thttpd_sapi_module = {
"thttpd",
"thttpd",
php_thttpd_startup,
php_module_shutdown_wrapper,
NULL, /* activate */
NULL, /* deactivate */
sapi_thttpd_ub_write,
NULL,
NULL, /* get uid */
NULL, /* getenv */
php_error,
NULL,
sapi_thttpd_send_headers,
NULL,
sapi_thttpd_read_post,
sapi_thttpd_read_cookies,
sapi_thttpd_register_variables,
NULL, /* Log message */
NULL, /* Get request time */
NULL, /* Child terminate */
NULL, /* php.ini path override */
NULL, /* Block interruptions */
NULL, /* Unblock interruptions */
NULL,
NULL,
NULL,
0,
sapi_thttpd_get_fd
};
static void thttpd_module_main(int show_source TSRMLS_DC)
{
zend_file_handle file_handle;
if (php_request_startup(TSRMLS_C) == FAILURE) {
return;
}
if (show_source) {
zend_syntax_highlighter_ini syntax_highlighter_ini;
php_get_highlight_struct(&syntax_highlighter_ini);
highlight_file(SG(request_info).path_translated, &syntax_highlighter_ini TSRMLS_CC);
} else {
file_handle.type = ZEND_HANDLE_FILENAME;
file_handle.filename = SG(request_info).path_translated;
file_handle.free_filename = 0;
file_handle.opened_path = NULL;
php_execute_script(&file_handle TSRMLS_CC);
}
php_request_shutdown(NULL);
}
static void thttpd_request_ctor(TSRMLS_D)
{
smart_str s = {0};
TG(seen_cl) = 0;
TG(seen_cn) = 0;
TG(sbuf).c = 0;
SG(request_info).query_string = TG(hc)->query?strdup(TG(hc)->query):NULL;
smart_str_appends_ex(&s, TG(hc)->hs->cwd, 1);
smart_str_appends_ex(&s, TG(hc)->expnfilename, 1);
smart_str_0(&s);
SG(request_info).path_translated = s.c;
s.c = NULL;
smart_str_appendc_ex(&s, '/', 1);
smart_str_appends_ex(&s, TG(hc)->origfilename, 1);
smart_str_0(&s);
SG(request_info).request_uri = s.c;
SG(request_info).request_method = httpd_method_str(TG(hc)->method);
if (TG(hc)->one_one) SG(request_info).proto_num = 1001;
else SG(request_info).proto_num = 1000;
SG(sapi_headers).http_response_code = 200;
if (TG(hc)->contenttype)
SG(request_info).content_type = strdup(TG(hc)->contenttype);
SG(request_info).content_length = TG(hc)->contentlength == -1 ? 0
: TG(hc)->contentlength;
TG(unconsumed_length) = SG(request_info).content_length;
php_handle_auth_data(TG(hc)->authorization TSRMLS_CC);
}
static void thttpd_request_dtor(TSRMLS_D)
{
smart_str_free_ex(&TG(sbuf), 1);
if (SG(request_info).query_string)
free(SG(request_info).query_string);
free(SG(request_info).request_uri);
free(SG(request_info).path_translated);
if (SG(request_info).content_type)
free(SG(request_info).content_type);
}
#ifdef ZTS
#ifdef TSRM_ST
#define thread_create_simple_detached(n) st_thread_create(n, NULL, 0, 0)
#define thread_usleep(n) st_usleep(n)
#define thread_exit() st_thread_exit(NULL)
/* No preemption, simple operations are safe */
#define thread_atomic_inc(n) (++n)
#define thread_atomic_dec(n) (--n)
#else
#error No thread primitives available
#endif
/* We might want to replace this with a STAILQ */
typedef struct qreq {
httpd_conn *hc;
struct qreq *next;
} qreq_t;
static MUTEX_T qr_lock;
static qreq_t *queued_requests;
static qreq_t *last_qr;
static int nr_free_threads;
static int nr_threads;
static int max_threads = 50;
#define HANDLE_STRINGS() { \
HANDLE_STR(encodedurl); \
HANDLE_STR(decodedurl); \
HANDLE_STR(origfilename); \
HANDLE_STR(expnfilename); \
HANDLE_STR(pathinfo); \
HANDLE_STR(query); \
HANDLE_STR(referer); \
HANDLE_STR(useragent); \
HANDLE_STR(accept); \
HANDLE_STR(accepte); \
HANDLE_STR(acceptl); \
HANDLE_STR(cookie); \
HANDLE_STR(contenttype); \
HANDLE_STR(authorization); \
HANDLE_STR(remoteuser); \
}
static httpd_conn *duplicate_conn(httpd_conn *hc, httpd_conn *nhc)
{
memcpy(nhc, hc, sizeof(*nhc));
#define HANDLE_STR(m) nhc->m = nhc->m ? strdup(nhc->m) : NULL
HANDLE_STRINGS();
#undef HANDLE_STR
return nhc;
}
static void destroy_conn(httpd_conn *hc)
{
#define HANDLE_STR(m) if (hc->m) free(hc->m)
HANDLE_STRINGS();
#undef HANDLE_STR
}
static httpd_conn *dequeue_request(void)
{
httpd_conn *ret = NULL;
qreq_t *m;
tsrm_mutex_lock(qr_lock);
if (queued_requests) {
m = queued_requests;
ret = m->hc;
if (!(queued_requests = m->next))
last_qr = NULL;
free(m);
}
tsrm_mutex_unlock(qr_lock);
return ret;
}
static void *worker_thread(void *);
static void queue_request(httpd_conn *hc)
{
qreq_t *m;
httpd_conn *nhc;
/* Mark as long-running request */
hc->file_address = (char *) 1;
/*
* We cannot synchronously revoke accesses to hc in the worker
* thread, so we need to pass a copy of hc to the worker thread.
*/
nhc = malloc(sizeof *nhc);
duplicate_conn(hc, nhc);
/* Allocate request queue container */
m = malloc(sizeof *m);
m->hc = nhc;
m->next = NULL;
tsrm_mutex_lock(qr_lock);
/* Create new threads when reaching a certain threshhold */
if (nr_threads < max_threads && nr_free_threads < 2) {
nr_threads++; /* protected by qr_lock */
thread_atomic_inc(nr_free_threads);
thread_create_simple_detached(worker_thread);
}
/* Insert container into request queue */
if (queued_requests)
last_qr->next = m;
else
queued_requests = m;
last_qr = m;
tsrm_mutex_unlock(qr_lock);
}
static off_t thttpd_real_php_request(httpd_conn *hc, int TSRMLS_DC);
static void *worker_thread(void *dummy)
{
int do_work = 50;
httpd_conn *hc;
while (do_work) {
hc = dequeue_request();
if (!hc) {
/* do_work--; */
thread_usleep(500000);
continue;
}
/* do_work = 50; */
thread_atomic_dec(nr_free_threads);
thttpd_real_php_request(hc, 0 TSRMLS_CC);
shutdown(hc->conn_fd, 0);
destroy_conn(hc);
free(hc);
thread_atomic_inc(nr_free_threads);
}
thread_atomic_dec(nr_free_threads);
thread_atomic_dec(nr_threads);
thread_exit();
}
static void remove_dead_conn(int fd)
{
qreq_t *m, *prev = NULL;
tsrm_mutex_lock(qr_lock);
m = queued_requests;
while (m) {
if (m->hc->conn_fd == fd) {
if (prev)
if (!(prev->next = m->next))
last_qr = prev;
else
if (!(queued_requests = m->next))
last_qr = NULL;
destroy_conn(m->hc);
free(m->hc);
free(m);
break;
}
prev = m;
m = m->next;
}
tsrm_mutex_unlock(qr_lock);
}
#endif
static off_t thttpd_real_php_request(httpd_conn *hc, int show_source TSRMLS_DC)
{
TG(hc) = hc;
hc->bytes_sent = 0;
if (hc->contentlength != -1) {
hc->should_linger = 1;
hc->do_keep_alive = 0;
}
if (hc->contentlength != -1
&& SIZEOF_UNCONSUMED_BYTES() < hc->contentlength) {
hc->read_body_into_mem = 1;
return 0;
}
thttpd_request_ctor(TSRMLS_C);
thttpd_module_main(show_source TSRMLS_CC);
/* disable kl, if no content-length was seen or Connection: was set */
if (TG(seen_cl) == 0 || TG(seen_cn) == 1) {
TG(hc)->do_keep_alive = 0;
}
if (TG(sbuf).c != 0) {
if (TG(hc)->response)
free(TG(hc)->response);
TG(hc)->response = TG(sbuf).c;
TG(hc)->responselen = TG(sbuf).len;
TG(hc)->maxresponse = TG(sbuf).a;
TG(sbuf).c = 0;
TG(sbuf).len = 0;
TG(sbuf).a = 0;
}
thttpd_request_dtor(TSRMLS_C);
return 0;
}
off_t thttpd_php_request(httpd_conn *hc, int show_source)
{
#ifdef ZTS
queue_request(hc);
#else
TSRMLS_FETCH();
return thttpd_real_php_request(hc, show_source TSRMLS_CC);
#endif
}
void thttpd_register_on_close(void (*arg)(int))
{
TSRMLS_FETCH();
TG(on_close) = arg;
}
void thttpd_closed_conn(int fd)
{
TSRMLS_FETCH();
if (TG(on_close)) TG(on_close)(fd);
}
int thttpd_get_fd(void)
{
TSRMLS_FETCH();
return TG(hc)->conn_fd;
}
void thttpd_set_dont_close(void)
{
TSRMLS_FETCH();
#ifndef PREMIUM_THTTPD
TG(hc)->file_address = (char *) 1;
#endif
}
void thttpd_php_init(void)
{
char *ini;
#ifdef ZTS
tsrm_startup(1, 1, 0, NULL);
ts_allocate_id(&thttpd_globals_id, sizeof(php_thttpd_globals), NULL, NULL);
qr_lock = tsrm_mutex_alloc();
thttpd_register_on_close(remove_dead_conn);
#endif
if ((ini = getenv("PHP_INI_PATH"))) {
thttpd_sapi_module.php_ini_path_override = ini;
}
sapi_startup(&thttpd_sapi_module);
thttpd_sapi_module.startup(&thttpd_sapi_module);
{
TSRMLS_FETCH();
SG(server_context) = (void *) 1;
}
}
void thttpd_php_shutdown(void)
{
TSRMLS_FETCH();
if (SG(server_context) != NULL) {
thttpd_sapi_module.shutdown(&thttpd_sapi_module);
sapi_shutdown();
#ifdef ZTS
tsrm_shutdown();
#endif
}
}
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