summaryrefslogtreecommitdiff
path: root/sapi/apache2handler/sapi_apache2.c
blob: d7f18f113109d5cac6d528b0f0484bedab2c25dd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
/*
   +----------------------------------------------------------------------+
   | PHP Version 5                                                        |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997-2004 The PHP Group                                |
   +----------------------------------------------------------------------+
   | This source file is subject to version 3.0 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_0.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.               |
   +----------------------------------------------------------------------+
   | Authors: Sascha Schumann <sascha@schumann.cx>                        |
   |          Parts based on Apache 1.3 SAPI module by                    |
   |          Rasmus Lerdorf and Zeev Suraski                             |
   +----------------------------------------------------------------------+
 */

/* $Id$ */

#define ZEND_INCLUDE_FULL_WINDOWS_HEADERS

#include "php.h"
#include "php_main.h"
#include "php_ini.h"
#include "php_variables.h"
#include "SAPI.h"

#include <fcntl.h>

#include "ext/standard/php_smart_str.h"
#ifndef NETWARE
#include "ext/standard/php_standard.h"
#else
#include "ext/standard/basic_functions.h"
#endif

#include "apr_strings.h"
#include "ap_config.h"
#include "util_filter.h"
#include "httpd.h"
#include "http_config.h"
#include "http_request.h"
#include "http_core.h"
#include "http_protocol.h"
#include "http_log.h"
#include "http_main.h"
#include "util_script.h"
#include "http_core.h"
#include "ap_mpm.h"

#include "php_apache.h"

/* UnixWare and Netware define shutdown to _shutdown, which causes problems later
 * on when using a structure member named shutdown. Since this source
 * file does not use the system call shutdown, it is safe to #undef it.K
 */
#undef shutdown

#define PHP_MAGIC_TYPE "application/x-httpd-php"
#define PHP_SOURCE_MAGIC_TYPE "application/x-httpd-php-source"
#define PHP_SCRIPT "php5-script"

/* A way to specify the location of the php.ini dir in an apache directive */
char *apache2_php_ini_path_override = NULL;

static int
php_apache_sapi_ub_write(const char *str, uint str_length TSRMLS_DC)
{
	request_rec *r;
	php_struct *ctx;

	ctx = SG(server_context);
	r = ctx->r;

	if (ap_rwrite(str, str_length, r) < 0) {
		php_handle_aborted_connection();
	}

	return str_length; /* we always consume all the data passed to us. */
}

static int
php_apache_sapi_header_handler(sapi_header_struct *sapi_header,sapi_headers_struct *sapi_headers TSRMLS_DC)
{
	php_struct *ctx;
	char *val;

	ctx = SG(server_context);

	val = strchr(sapi_header->header, ':');

	if (!val) {
		sapi_free_header(sapi_header);
		return 0;
	}

	*val = '\0';
	
	do {
		val++;
	} while (*val == ' ');

	if (!strcasecmp(sapi_header->header, "content-type")) {
		val = apr_pstrdup(ctx->r->pool, val);
		ap_set_content_type(ctx->r, val);
	} else if (sapi_header->replace) {
		apr_table_set(ctx->r->headers_out, sapi_header->header, val);
	} else {
		apr_table_add(ctx->r->headers_out, sapi_header->header, val);
	}
	
	sapi_free_header(sapi_header);

	return 0;
}

static int
php_apache_sapi_send_headers(sapi_headers_struct *sapi_headers TSRMLS_DC)
{
	php_struct *ctx = SG(server_context);
	const char *sline = SG(sapi_headers).http_status_line;

	ctx->r->status = SG(sapi_headers).http_response_code;

	/* httpd requires that r->status_line is set to the first digit of
	 * the status-code: */
	if (sline && strlen(sline) > 12 && strncmp(sline, "HTTP/1.", 7) == 0 
		&& sline[8] == ' ') {
		ctx->r->status_line = apr_pstrdup(ctx->r->pool, sline + 9);
	}

	return SAPI_HEADER_SENT_SUCCESSFULLY;
}

static int
php_apache_sapi_read_post(char *buf, uint count_bytes TSRMLS_DC)
{
	apr_size_t len, tlen=0;
	php_struct *ctx = SG(server_context);
	request_rec *r;
	apr_bucket_brigade *brigade;

	r = ctx->r;
	brigade = ctx->brigade;
	len = count_bytes;

	/*
	 * This loop is needed because ap_get_brigade() can return us partial data
	 * which would cause premature termination of request read. Therefor we
	 * need to make sure that if data is available we fill the buffer completely.
	 */

	while (ap_get_brigade(r->input_filters, brigade, AP_MODE_READBYTES, APR_BLOCK_READ, len) == APR_SUCCESS) {
		apr_brigade_flatten(brigade, buf, &len);
		apr_brigade_cleanup(brigade);
		tlen += len;
		if (tlen == count_bytes || !len) {
			break;
		}
		buf += len;
		len = count_bytes - tlen;
	}
	
	return tlen;
}

static struct stat*
php_apache_sapi_get_stat(TSRMLS_D)
{
	php_struct *ctx = SG(server_context);

	ctx->finfo.st_uid = ctx->r->finfo.user;
	ctx->finfo.st_gid = ctx->r->finfo.group;
	ctx->finfo.st_dev = ctx->r->finfo.device;
	ctx->finfo.st_ino = ctx->r->finfo.inode;
#if defined(NETWARE) && defined(CLIB_STAT_PATCH)
	ctx->finfo.st_atime.tv_sec = apr_time_sec(ctx->r->finfo.atime);
	ctx->finfo.st_mtime.tv_sec = apr_time_sec(ctx->r->finfo.mtime);
	ctx->finfo.st_ctime.tv_sec = apr_time_sec(ctx->r->finfo.ctime);
#else
	ctx->finfo.st_atime = apr_time_sec(ctx->r->finfo.atime);
	ctx->finfo.st_mtime = apr_time_sec(ctx->r->finfo.mtime);
	ctx->finfo.st_ctime = apr_time_sec(ctx->r->finfo.ctime);
#endif

	ctx->finfo.st_size = ctx->r->finfo.size;
	ctx->finfo.st_nlink = ctx->r->finfo.nlink;

	return &ctx->finfo;
}

static char *
php_apache_sapi_read_cookies(TSRMLS_D)
{
	php_struct *ctx = SG(server_context);
	const char *http_cookie;

	http_cookie = apr_table_get(ctx->r->headers_in, "cookie");

	/* The SAPI interface should use 'const char *' */
	return (char *) http_cookie;
}

static char *
php_apache_sapi_getenv(char *name, size_t name_len TSRMLS_DC)
{
	php_struct *ctx = SG(server_context);
	const char *env_var;
	
	env_var = apr_table_get(ctx->r->subprocess_env, name);

	return (char *) env_var;
}

static void
php_apache_sapi_register_variables(zval *track_vars_array TSRMLS_DC)
{
	php_struct *ctx = SG(server_context);
	const apr_array_header_t *arr = apr_table_elts(ctx->r->subprocess_env);
	char *key, *val;
	
	APR_ARRAY_FOREACH_OPEN(arr, key, val)
		if (!val) val = "";
		php_register_variable(key, val, track_vars_array TSRMLS_CC);
	APR_ARRAY_FOREACH_CLOSE()
		
	php_register_variable("PHP_SELF", ctx->r->uri, track_vars_array TSRMLS_CC);
}

static void
php_apache_sapi_flush(void *server_context)
{
	php_struct *ctx;
	request_rec *r;
	TSRMLS_FETCH();

	ctx = server_context;

	/* If we haven't registered a server_context yet,
	 * then don't bother flushing. */
	if (!server_context) {
		return;
	}

	r = ctx->r;

	sapi_send_headers(TSRMLS_C);

	r->status = SG(sapi_headers).http_response_code;
	SG(headers_sent) = 1;

	if (ap_rflush(r) < 0 || r->connection->aborted) {
		php_handle_aborted_connection();
	}
}

static void php_apache_sapi_log_message(char *msg)
{
	php_struct *ctx;
	TSRMLS_FETCH();

	ctx = SG(server_context);

	if (ctx == NULL) { /* we haven't initialized our ctx yet, oh well */
		ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP, 0, NULL, "%s", msg);
	} else {
		ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, ctx->r, "%s", msg);
	}
}

static void php_apache_sapi_log_message_ex(char *msg, request_rec *r)
{
	if (r) {
		ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, msg, r->filename);
	} else {
		php_apache_sapi_log_message(msg);
	}
}

static time_t php_apache_sapi_get_request_time(TSRMLS_D) {
	php_struct *ctx = SG(server_context);
	return apr_time_sec(ctx->r->request_time);
}

extern zend_module_entry php_apache_module;

static int php_apache2_startup(sapi_module_struct *sapi_module)
{
	if (php_module_startup(sapi_module, &php_apache_module, 1)==FAILURE) {
		return FAILURE;
	}
	return SUCCESS;
}

static sapi_module_struct apache2_sapi_module = {
	"apache2handler",
	"Apache 2.0 Handler",

	php_apache2_startup,				/* startup */
	php_module_shutdown_wrapper,			/* shutdown */

	NULL,						/* activate */
	NULL,						/* deactivate */

	php_apache_sapi_ub_write,			/* unbuffered write */
	php_apache_sapi_flush,				/* flush */
	php_apache_sapi_get_stat,			/* get uid */
	php_apache_sapi_getenv,				/* getenv */

	php_error,					/* error handler */

	php_apache_sapi_header_handler,			/* header handler */
	php_apache_sapi_send_headers,			/* send headers handler */
	NULL,						/* send header handler */

	php_apache_sapi_read_post,			/* read POST data */
	php_apache_sapi_read_cookies,			/* read Cookies */

	php_apache_sapi_register_variables,
	php_apache_sapi_log_message,			/* Log message */
	php_apache_sapi_get_request_time,		/* Request Time */

	STANDARD_SAPI_MODULE_PROPERTIES
};

static apr_status_t
php_apache_server_shutdown(void *tmp)
{
	apache2_sapi_module.shutdown(&apache2_sapi_module);
	sapi_shutdown();
#ifdef ZTS
	tsrm_shutdown();
#endif
	return APR_SUCCESS;
}

static void php_apache_add_version(apr_pool_t *p)
{
	TSRMLS_FETCH();
	if (PG(expose_php)) {
		ap_add_version_component(p, "PHP/" PHP_VERSION);
	}
}

static int php_pre_config(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp)
{
#ifndef ZTS
	int threaded_mpm;

	ap_mpm_query(AP_MPMQ_IS_THREADED, &threaded_mpm);
	if(threaded_mpm) {
		ap_log_error(APLOG_MARK, APLOG_CRIT, 0, 0, "Apache is running a threaded MPM, but your PHP Module is not compiled to be threadsafe.  You need to recompile PHP.");
		return DONE;
	}
#endif
	/* When this is NULL, apache won't override the hard-coded default
	 * php.ini path setting. */
	apache2_php_ini_path_override = NULL;
	return OK;
}

static int
php_apache_server_startup(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)
{
	void *data = NULL;
	const char *userdata_key = "apache2hook_post_config";

	/* Apache will load, unload and then reload a DSO module. This
	 * prevents us from starting PHP until the second load. */
	apr_pool_userdata_get(&data, userdata_key, s->process->pool);
	if (data == NULL) {
		/* We must use set() here and *not* setn(), otherwise the
		 * static string pointed to by userdata_key will be mapped
		 * to a different location when the DSO is reloaded and the
		 * pointers won't match, causing get() to return NULL when
		 * we expected it to return non-NULL. */
		apr_pool_userdata_set((const void *)1, userdata_key, apr_pool_cleanup_null, s->process->pool);
		return OK;
	}

	/* Set up our overridden path. */
	if (apache2_php_ini_path_override) {
		apache2_sapi_module.php_ini_path_override = apache2_php_ini_path_override;
	}
#ifdef ZTS
	tsrm_startup(1, 1, 0, NULL);
#endif
	sapi_startup(&apache2_sapi_module);
	apache2_sapi_module.startup(&apache2_sapi_module);
	apr_pool_cleanup_register(pconf, NULL, php_apache_server_shutdown, apr_pool_cleanup_null);
	php_apache_add_version(pconf);

	return OK;
}

static apr_status_t php_server_context_cleanup(void *data_)
{
	void **data = data_;
	*data = NULL;
	return APR_SUCCESS;
}

static int php_apache_request_ctor(request_rec *r, php_struct *ctx TSRMLS_DC)
{
	char *content_type;
	char *content_length;
	const char *auth;

	SG(sapi_headers).http_response_code = !r->status ? HTTP_OK : r->status;
	SG(request_info).content_type = apr_table_get(r->headers_in, "Content-Type");
	SG(request_info).query_string = apr_pstrdup(r->pool, r->args);
	SG(request_info).request_method = r->method;
	SG(request_info).proto_num = r->proto_num;
	SG(request_info).request_uri = apr_pstrdup(r->pool, r->uri);
	SG(request_info).path_translated = apr_pstrdup(r->pool, r->filename);
	r->no_local_copy = 1;

	content_type = sapi_get_default_content_type(TSRMLS_C);
	ap_set_content_type(r, apr_pstrdup(r->pool, content_type));
	efree(content_type);

	content_length = (char *) apr_table_get(r->headers_in, "Content-Length");
	SG(request_info).content_length = (content_length ? atoi(content_length) : 0);

	apr_table_unset(r->headers_out, "Content-Length");
	apr_table_unset(r->headers_out, "Last-Modified");
	apr_table_unset(r->headers_out, "Expires");
	apr_table_unset(r->headers_out, "ETag");
	if (!PG(safe_mode) || (PG(safe_mode) && !ap_auth_type(r))) {
		auth = apr_table_get(r->headers_in, "Authorization");
		php_handle_auth_data(auth TSRMLS_CC);
		ctx->r->user = apr_pstrdup(ctx->r->pool, SG(request_info).auth_user);
	} else {
		SG(request_info).auth_user = NULL;
		SG(request_info).auth_password = NULL;
	}
	return php_request_startup(TSRMLS_C);
}

static void php_apache_request_dtor(request_rec *r TSRMLS_DC)
{
	php_request_shutdown(NULL);
}

static int php_handler(request_rec *r)
{
	php_struct *ctx;
	void *conf;
	apr_bucket_brigade *brigade;
	apr_bucket *bucket;
	apr_status_t rv;
	request_rec *parent_req = NULL;
	TSRMLS_FETCH();

	conf = ap_get_module_config(r->per_dir_config, &php5_module);
	apply_config(conf);

	if (strcmp(r->handler, PHP_MAGIC_TYPE) && strcmp(r->handler, PHP_SOURCE_MAGIC_TYPE) && strcmp(r->handler, PHP_SCRIPT)) {
		/* Check for xbithack in this case. */
		if (!AP2(xbithack) || strcmp(r->handler, "text/html") || !(r->finfo.protection & APR_UEXECUTE)) {
			zend_try {
				zend_ini_deactivate(TSRMLS_C);
			} zend_end_try();
			return DECLINED;
		}
	}

	/* Give a 404 if PATH_INFO is used but is explicitly disabled in
	 * the configuration; default behaviour is to accept. */ 
	if (r->used_path_info == AP_REQ_REJECT_PATH_INFO
		&& r->path_info && r->path_info[0]) {
		zend_try {
			zend_ini_deactivate(TSRMLS_C);
		} zend_end_try();
		return HTTP_NOT_FOUND;
	}

	/* handle situations where user turns the engine off */
	if (!AP2(engine)) {
		zend_try {
			zend_ini_deactivate(TSRMLS_C);
		} zend_end_try();
		return DECLINED;
	}

	if (r->finfo.filetype == 0) {
		php_apache_sapi_log_message_ex("script '%s' not found or unable to stat", r);
		zend_try {
				zend_ini_deactivate(TSRMLS_C);
		} zend_end_try();
		return HTTP_NOT_FOUND;
	}
	if (r->finfo.filetype == APR_DIR) {
		php_apache_sapi_log_message_ex("attempt to invoke directory '%s' as script", r);
		zend_try {
			zend_ini_deactivate(TSRMLS_C);
		} zend_end_try();
		return HTTP_FORBIDDEN;
	}

	/* Setup the CGI variables if this is the main request */
	if (r->main == NULL ||
		/* .. or if the sub-request envinronment differs from the main-request. */
		r->subprocess_env != r->main->subprocess_env
	) {
		/* setup standard CGI variables */
		ap_add_common_vars(r);
		ap_add_cgi_vars(r);
	}

zend_first_try {

	ctx = SG(server_context);
	if (ctx == NULL) {
		ctx = SG(server_context) = apr_pcalloc(r->pool, sizeof(*ctx));
		/* register a cleanup so we clear out the SG(server_context)
		 * after each request. Note: We pass in the pointer to the
		 * server_context in case this is handled by a different thread.
		 */
		apr_pool_cleanup_register(r->pool, (void *)&SG(server_context), php_server_context_cleanup, apr_pool_cleanup_null);

		ctx->r = r;
		brigade = apr_brigade_create(r->pool, r->connection->bucket_alloc);
		ctx->brigade = brigade;

		if (php_apache_request_ctor(r, ctx TSRMLS_CC)!=SUCCESS) {
			zend_bailout();
		}
	} else {
		parent_req = ctx->r;
		ctx->r = r;
		brigade = ctx->brigade;
	}

	if (AP2(last_modified)) {
		ap_update_mtime(r, r->finfo.mtime);
		ap_set_last_modified(r);
	}

	/* Determine if we need to parse the file or show the source */
	if (strncmp(r->handler, PHP_SOURCE_MAGIC_TYPE, sizeof(PHP_SOURCE_MAGIC_TYPE) - 1) == 0) {
		zend_syntax_highlighter_ini syntax_highlighter_ini;
		php_get_highlight_struct(&syntax_highlighter_ini);
		highlight_file((char *)r->filename, &syntax_highlighter_ini TSRMLS_CC);
	} else {
		zend_file_handle zfd;

		zfd.type = ZEND_HANDLE_FILENAME;
		zfd.filename = (char *) r->filename;
		zfd.free_filename = 0;
		zfd.opened_path = NULL;

		if (!parent_req) {
			php_execute_script(&zfd TSRMLS_CC);
		} else {
			zend_execute_scripts(ZEND_INCLUDE TSRMLS_CC, NULL, 1, &zfd);
		}
#if MEMORY_LIMIT
		{
			char *mem_usage;

			mem_usage = apr_psprintf(ctx->r->pool, "%u", AG(allocated_memory_peak));
			apr_table_set(r->notes, "mod_php_memory_usage", mem_usage);
		}
#endif
	}

} zend_end_try();

	if (!parent_req) {
		php_apache_request_dtor(r TSRMLS_CC);
		ctx->request_processed = 1;
		bucket = apr_bucket_eos_create(r->connection->bucket_alloc);
		APR_BRIGADE_INSERT_TAIL(brigade, bucket);

		rv = ap_pass_brigade(r->output_filters, brigade);
		if (rv != APR_SUCCESS || r->connection->aborted) {
zend_first_try {
			php_handle_aborted_connection();
} zend_end_try();
		}
		apr_brigade_cleanup(brigade);
	} else {
		ctx->r = parent_req;
	}

	return OK;
}

void php_ap2_register_hook(apr_pool_t *p)
{
	ap_hook_pre_config(php_pre_config, NULL, NULL, APR_HOOK_MIDDLE);
	ap_hook_post_config(php_apache_server_startup, NULL, NULL, APR_HOOK_MIDDLE);
	ap_hook_handler(php_handler, NULL, NULL, APR_HOOK_MIDDLE);
}

/*
 * Local variables:
 * tab-width: 4
 * c-basic-offset: 4
 * End:
 * vim600: sw=4 ts=4 fdm=marker
 * vim<600: sw=4 ts=4
 */