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events_signal: pass down the correct siginfo_t struct to the event handler
[Samba/gbeck.git] / source4 / web_server / http.c
blobbd6efa9262aac42ecd7b6d7769ccc62af91bfc94
1 /*
2 Unix SMB/CIFS implementation.
3
4 http handling code
5
6 Copyright (C) Andrew Tridgell 2005
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "smbd/service_task.h"
24 #include "web_server/web_server.h"
25 #include "smbd/service_stream.h"
26 #include "smbd/service.h"
27 #include "lib/events/events.h"
28 #include "system/time.h"
29 #include "system/wait.h"
30 #include "lib/appweb/esp/esp.h"
31 #include "lib/appweb/ejs/ejsInternal.h"
32 #include "lib/util/dlinklist.h"
33 #include "lib/tls/tls.h"
34 #include "scripting/ejs/smbcalls.h"
35 #include "param/param.h"
36
37 #define SAMBA_SESSION_KEY "SambaSessionId"
38 #define HTTP_PREAUTH_URI "/scripting/preauth.esp"
39
40 /* state of the esp subsystem for a specific request */
41 struct esp_state {
42 struct websrv_context *web;
43 struct EspRequest *req;
44 struct MprVar variables[ESP_OBJ_MAX];
45 struct session_data *session;
46 };
47
48 /*
49 output the http headers
50 */
51 static void http_output_headers(struct websrv_context *web)
52 {
53 int i;
54 char *s;
55 DATA_BLOB b;
56 uint32_t content_length = 0;
57 const char *response_string = "Unknown Code";
58 const struct {
59 unsigned code;
60 const char *response_string;
61 } codes[] = {
62 { 200, "OK" },
63 { 301, "Moved" },
64 { 302, "Found" },
65 { 303, "Method" },
66 { 304, "Not Modified" },
67 { 400, "Bad request" },
68 { 401, "Unauthorized" },
69 { 403, "Forbidden" },
70 { 404, "Not Found" },
71 { 500, "Internal Server Error" },
72 { 501, "Not implemented" }
73 };
74 for (i=0;i<ARRAY_SIZE(codes);i++) {
75 if (codes[i].code == web->output.response_code) {
76 response_string = codes[i].response_string;
77 }
78 }
79
80 if (web->output.headers == NULL) return;
81 s = talloc_asprintf(web, "HTTP/1.0 %u %s\r\n",
82 web->output.response_code, response_string);
83 if (s == NULL) return;
84 for (i=0;web->output.headers[i];i++) {
85 s = talloc_asprintf_append_buffer(s, "%s\r\n", web->output.headers[i]);
86 }
87
88 /* work out the content length */
89 content_length = web->output.content.length;
90 if (web->output.fd != -1) {
91 struct stat st;
92 fstat(web->output.fd, &st);
93 content_length += st.st_size;
94 }
95 s = talloc_asprintf_append_buffer(s, "Content-Length: %u\r\n\r\n", content_length);
96 if (s == NULL) return;
97
98 b = web->output.content;
99 web->output.content = data_blob_string_const(s);
100 data_blob_append(web, &web->output.content, b.data, b.length);
101 data_blob_free(&b);
102 }
103
104 /*
105 return the local path for a URL
106 */
107 static const char *http_local_path(struct websrv_context *web,
108 const char *url,
109 const char *base_dir)
110 {
111 int i;
112 char *path;
113
114 /* check that the url is OK */
115 if (url[0] != '/') return NULL;
116
117 for (i=0;url[i];i++) {
118 if ((!isalnum((unsigned char)url[i]) && !strchr("./_-", url[i])) ||
119 (url[i] == '.' && strchr("/.", url[i+1]))) {
120 return NULL;
121 }
122 }
123
124 path = talloc_asprintf(web, "%s/%s", base_dir, url+1);
125 if (path == NULL) return NULL;
126
127 if (directory_exist(path)) {
128 path = talloc_asprintf_append_buffer(path, "/index.esp");
129 }
130 return path;
131 }
132
133 /*
134 called when esp wants to read a file to support include() calls
135 */
136 static int http_readFile(EspHandle handle,
137 char **buf,
138 int *len,
139 const char *path,
140 const char *base_dir)
141 {
142 struct websrv_context *web = talloc_get_type(handle,
143 struct websrv_context);
144 int fd = -1;
145 struct stat st;
146 *buf = NULL;
147
148 path = http_local_path(web, path, base_dir);
149 if (path == NULL) goto failed;
150
151 fd = open(path, O_RDONLY);
152 if (fd == -1 || fstat(fd, &st) != 0 || !S_ISREG(st.st_mode)) goto failed;
153
154 *buf = talloc_array(handle, char, st.st_size+1);
155 if (*buf == NULL) goto failed;
156
157 if (read(fd, *buf, st.st_size) != st.st_size) goto failed;
158
159 (*buf)[st.st_size] = 0;
160
161 close(fd);
162 *len = st.st_size;
163 return 0;
164
165 failed:
166 DEBUG(0,("Failed to read file %s - %s\n", path, strerror(errno)));
167 if (fd != -1) close(fd);
168 talloc_free(*buf);
169 *buf = NULL;
170 return -1;
171 }
172
173 static int http_readFileFromSwatDir(EspHandle handle, char **buf, int *len,
174 const char *path)
175 {
176 return http_readFile(handle, buf, len, path,
177 lp_swat_directory(global_loadparm));
178 }
179
180
181
182 /*
183 called when esp wants to find the real path of a file
184 */
185 static int http_mapToStorage(EspHandle handle, char *path, int len, const char *uri, int flags)
186 {
187 if (uri == NULL || strlen(uri) >= len) return -1;
188 strncpy(path, uri, len);
189 return 0;
190 }
191
192 /*
193 called when esp wants to output something
194 */
195 static int http_writeBlock(EspHandle handle, const char *buf, int size)
196 {
197 struct websrv_context *web = talloc_get_type(handle, struct websrv_context);
198 if (!data_blob_append(web, &web->output.content, buf, size))
199 return -1;
200 return size;
201 }
202
203
204 /*
205 set a http header
206 */
207 static void http_setHeader(EspHandle handle, const char *value, bool allowMultiple)
208 {
209 struct websrv_context *web = talloc_get_type(handle, struct websrv_context);
210 char *p = strchr(value, ':');
211
212 if (p && !allowMultiple && web->output.headers) {
213 int i;
214 for (i=0;web->output.headers[i];i++) {
215 if (strncmp(web->output.headers[i], value, (p+1)-value) == 0) {
216 web->output.headers[i] = talloc_strdup(web, value);
217 return;
218 }
219 }
220 }
221
222 web->output.headers = str_list_add(web->output.headers, value);
223 talloc_steal(web, web->output.headers);
224 }
225
226 /*
227 set a http response code
228 */
229 static void http_setResponseCode(EspHandle handle, int code)
230 {
231 struct websrv_context *web = talloc_get_type(handle, struct websrv_context);
232 web->output.response_code = code;
233 }
234
235 /*
236 redirect to another web page
237 */
238 static void http_redirect(EspHandle handle, int code, char *url)
239 {
240 struct websrv_context *web = talloc_get_type(handle, struct websrv_context);
241 const char *host = web->input.host;
242
243 /* form the full url, unless it already looks like a url */
244 if (strchr(url, ':') == NULL) {
245 if (host == NULL) {
246 struct socket_address *socket_address = socket_get_my_addr(web->conn->socket, web);
247 if (socket_address == NULL) goto internal_error;
248 host = talloc_asprintf(web, "%s:%u",
249 socket_address->addr, socket_address->port);
250 }
251 if (host == NULL) goto internal_error;
252 if (url[0] != '/') {
253 char *p = strrchr(web->input.url, '/');
254 if (p == web->input.url) {
255 url = talloc_asprintf(web, "http%s://%s/%s",
256 tls_enabled(web->conn->socket)?"s":"",
257 host, url);
258 } else {
259 int dirlen = p - web->input.url;
260 url = talloc_asprintf(web, "http%s://%s%*.*s/%s",
261 tls_enabled(web->conn->socket)?"s":"",
262 host,
263 dirlen, dirlen, web->input.url,
264 url);
265 }
266 if (url == NULL) goto internal_error;
267 }
268 }
269
270 http_setHeader(handle, talloc_asprintf(web, "Location: %s", url), 0);
271
272 /* make sure we give a valid redirect code */
273 if (code >= 300 && code < 400) {
274 http_setResponseCode(handle, code);
275 } else {
276 http_setResponseCode(handle, 302);
277 }
278 return;
279
280 internal_error:
281 http_error(web, 500, "Internal server error");
282 }
283
284
285 /*
286 setup a cookie
287 */
288 static void http_setCookie(EspHandle handle, const char *name, const char *value,
289 int lifetime, const char *path, bool secure)
290 {
291 struct websrv_context *web = talloc_get_type(handle, struct websrv_context);
292 char *buf;
293
294 if (lifetime > 0) {
295 buf = talloc_asprintf(web, "Set-Cookie: %s=%s; path=%s; Expires=%s; %s",
296 name, value, path?path:"/",
297 http_timestring(web, time(NULL)+lifetime),
298 secure?"secure":"");
299 } else {
300 buf = talloc_asprintf(web, "Set-Cookie: %s=%s; path=%s; %s",
301 name, value, path?path:"/",
302 secure?"secure":"");
303 }
304 http_setHeader(handle, "Cache-control: no-cache=\"set-cookie\"", 0);
305 http_setHeader(handle, buf, 0);
306 talloc_free(buf);
307 }
308
309 /*
310 return the session id
311 */
312 static const char *http_getSessionId(EspHandle handle)
313 {
314 struct websrv_context *web = talloc_get_type(handle, struct websrv_context);
315 return web->session->id;
316 }
317
318 /*
319 setup a session
320 */
321 static void http_createSession(EspHandle handle, int timeout)
322 {
323 struct websrv_context *web = talloc_get_type(handle, struct websrv_context);
324 if (web->session) {
325 web->session->lifetime = timeout;
326 http_setCookie(web, SAMBA_SESSION_KEY, web->session->id,
327 web->session->lifetime, "/", 0);
328 }
329 }
330
331 /*
332 destroy a session
333 */
334 static void http_destroySession(EspHandle handle)
335 {
336 struct websrv_context *web = talloc_get_type(handle, struct websrv_context);
337 talloc_free(web->session);
338 web->session = NULL;
339 }
340
341
342 /*
343 setup for a raw http level error
344 */
345 void http_error(struct websrv_context *web, int code, const char *info)
346 {
347 char *s;
348 s = talloc_asprintf(web,"<HTML><HEAD><TITLE>Error %u</TITLE></HEAD><BODY><H1>Error %u</H1><pre>%s</pre><p></BODY></HTML>\r\n\r\n",
349 code, code, info);
350 if (s == NULL) {
351 stream_terminate_connection(web->conn, "http_error: out of memory");
352 return;
353 }
354 http_writeBlock(web, s, strlen(s));
355 http_setResponseCode(web, code);
356 http_output_headers(web);
357 EVENT_FD_NOT_READABLE(web->conn->event.fde);
358 EVENT_FD_WRITEABLE(web->conn->event.fde);
359 web->output.output_pending = true;
360 }
361
362 /*
363 map a unix error code to a http error
364 */
365 void http_error_unix(struct websrv_context *web, const char *info)
366 {
367 int code = 500;
368 switch (errno) {
369 case ENOENT:
370 case EISDIR:
371 code = 404;
372 break;
373 case EACCES:
374 code = 403;
375 break;
376 }
377 info = talloc_asprintf(web, "%s<p>%s<p>\n", info, strerror(errno));
378 http_error(web, code, info);
379 }
380
381
382 /*
383 a simple file request
384 */
385 static void http_simple_request(struct websrv_context *web)
386 {
387 const char *url = web->input.url;
388 const char *path;
389 struct stat st;
390
391 path = http_local_path(web, url, lp_swat_directory(web->task->lp_ctx));
392 if (path == NULL) goto invalid;
393
394 /* looks ok */
395 web->output.fd = open(path, O_RDONLY);
396 if (web->output.fd == -1) {
397 DEBUG(0,("Failed to read file %s - %s\n", path, strerror(errno)));
398 http_error_unix(web, path);
399 return;
400 }
401
402 if (fstat(web->output.fd, &st) != 0 || !S_ISREG(st.st_mode)) {
403 close(web->output.fd);
404 goto invalid;
405 }
406
407 return;
408
409 invalid:
410 http_error(web, 400, "Malformed URL");
411 }
412
413 /*
414 setup the standard ESP arrays
415 */
416 static void http_setup_arrays(struct esp_state *esp)
417 {
418 struct websrv_context *web = esp->web;
419 struct esp_data *edata = talloc_get_type(web->task->private, struct esp_data);
420 struct EspRequest *req = esp->req;
421 struct socket_address *socket_address = socket_get_my_addr(web->conn->socket, esp);
422 struct socket_address *peer_address = socket_get_peer_addr(web->conn->socket, esp);
423 char *p;
424
425 #define SETVAR(type, name, value) do { \
426 const char *v = value; \
427 if (v) espSetStringVar(req, type, name, v); \
428 } while (0)
429
430 SETVAR(ESP_REQUEST_OBJ, "CONTENT_LENGTH",
431 talloc_asprintf(esp, "%u", web->input.content_length));
432 SETVAR(ESP_REQUEST_OBJ, "QUERY_STRING", web->input.query_string);
433 SETVAR(ESP_REQUEST_OBJ, "POST_DATA",
434 talloc_strndup(esp,
435 web->input.partial.data,
436 web->input.partial.length));
437 SETVAR(ESP_REQUEST_OBJ, "REQUEST_METHOD", web->input.post_request?"POST":"GET");
438 SETVAR(ESP_REQUEST_OBJ, "REQUEST_URI", web->input.url);
439 p = strrchr(web->input.url, '/');
440 SETVAR(ESP_REQUEST_OBJ, "SCRIPT_NAME", p+1);
441 SETVAR(ESP_REQUEST_OBJ, "SCRIPT_FILENAME", web->input.url);
442 if (peer_address) {
443 struct MprVar mpv = mprObject("socket_address");
444 mprSetPtrChild(&mpv, "socket_address", peer_address);
445 espSetVar(req, ESP_REQUEST_OBJ, "REMOTE_SOCKET_ADDRESS", mpv);
446 SETVAR(ESP_REQUEST_OBJ, "REMOTE_ADDR", peer_address->addr);
447 }
448 p = socket_get_peer_name(web->conn->socket, esp);
449 SETVAR(ESP_REQUEST_OBJ, "REMOTE_HOST", p);
450 SETVAR(ESP_REQUEST_OBJ, "REMOTE_USER", "");
451 SETVAR(ESP_REQUEST_OBJ, "CONTENT_TYPE", web->input.content_type);
452 if (web->session) {
453 SETVAR(ESP_REQUEST_OBJ, "SESSION_ID", web->session->id);
454 }
455 SETVAR(ESP_REQUEST_OBJ, "COOKIE_SUPPORT", web->input.cookie?"true":"false");
456
457 SETVAR(ESP_HEADERS_OBJ, "HTTP_REFERER", web->input.referer);
458 SETVAR(ESP_HEADERS_OBJ, "HOST", web->input.host);
459 SETVAR(ESP_HEADERS_OBJ, "ACCEPT_ENCODING", web->input.accept_encoding);
460 SETVAR(ESP_HEADERS_OBJ, "ACCEPT_LANGUAGE", web->input.accept_language);
461 SETVAR(ESP_HEADERS_OBJ, "ACCEPT_CHARSET", web->input.accept_charset);
462 SETVAR(ESP_HEADERS_OBJ, "COOKIE", web->input.cookie);
463 SETVAR(ESP_HEADERS_OBJ, "USER_AGENT", web->input.user_agent);
464
465 if (socket_address) {
466 SETVAR(ESP_SERVER_OBJ, "SERVER_ADDR", socket_address->addr);
467 SETVAR(ESP_SERVER_OBJ, "SERVER_NAME", socket_address->addr);
468 SETVAR(ESP_SERVER_OBJ, "SERVER_HOST", socket_address->addr);
469 SETVAR(ESP_SERVER_OBJ, "SERVER_PORT",
470 talloc_asprintf(esp, "%u", socket_address->port));
471 }
472
473 SETVAR(ESP_SERVER_OBJ, "DOCUMENT_ROOT", lp_swat_directory(esp->web->task->lp_ctx));
474 SETVAR(ESP_SERVER_OBJ, "SERVER_PROTOCOL", tls_enabled(web->conn->socket)?"https":"http");
475 SETVAR(ESP_SERVER_OBJ, "SERVER_SOFTWARE", "SAMBA");
476 SETVAR(ESP_SERVER_OBJ, "GATEWAY_INTERFACE", "CGI/1.1");
477 SETVAR(ESP_SERVER_OBJ, "TLS_SUPPORT", tls_support(edata->tls_params)?"true":"false");
478 }
479
480 #if HAVE_SETJMP_H
481 /* the esp scripting lirary generates exceptions when
482 it hits a major error. We need to catch these and
483 report a internal server error via http
484 */
485 static jmp_buf ejs_exception_buf;
486 static const char *exception_reason;
487
488 static void web_server_ejs_exception(const char *reason)
489 {
490 Ejs *ep = ejsPtr(0);
491 if (ep) {
492 ejsSetErrorMsg(0, "%s", reason);
493 exception_reason = ep->error;
494 } else {
495 exception_reason = reason;
496 }
497 DEBUG(0,("%s", exception_reason));
498 longjmp(ejs_exception_buf, -1);
499 }
500 #else
501 static void web_server_ejs_exception(const char *reason)
502 {
503 DEBUG(0,("%s", reason));
504 smb_panic(reason);
505 }
506 #endif
507
508 /*
509 process a esp request
510 */
511 static void esp_request(struct esp_state *esp, const char *url)
512 {
513 struct websrv_context *web = esp->web;
514 int size;
515 int res;
516 char *emsg = NULL, *buf;
517
518 if (http_readFile(web, &buf, &size, url, lp_swat_directory(esp->web->task->lp_ctx)) != 0) {
519 http_error_unix(web, url);
520 return;
521 }
522
523 #if HAVE_SETJMP_H
524 if (setjmp(ejs_exception_buf) != 0) {
525 http_error(web, 500, exception_reason);
526 return;
527 }
528 #endif
529
530 res = espProcessRequest(esp->req, url, buf, &emsg);
531 if (res != 0 && emsg) {
532 http_writeBlock(web, "<pre>", 5);
533 http_writeBlock(web, emsg, strlen(emsg));
534 http_writeBlock(web, "</pre>", 6);
535 }
536 talloc_free(buf);
537 }
538
539 /*
540 perform pre-authentication on every page if /scripting/preauth.esp
541 exists. If this script generates any non-whitepace output at all,
542 then we don't run the requested URL.
543
544 note that the preauth is run even for static pages such as images
545 */
546 static bool http_preauth(struct esp_state *esp)
547 {
548 const char *path = http_local_path(esp->web,
549 HTTP_PREAUTH_URI,
550 lp_swat_directory(esp->web->task->lp_ctx));
551 int i;
552 if (path == NULL) {
553 http_error(esp->web, 500, "Internal server error");
554 return false;
555 }
556 if (!file_exist(path)) {
557 /* if the preath script is not installed then allow access */
558 return true;
559 }
560 esp_request(esp, HTTP_PREAUTH_URI);
561 for (i=0;i<esp->web->output.content.length;i++) {
562 if (!isspace(esp->web->output.content.data[i])) {
563 /* if the preauth has generated content, then force it
564 to be html, so that we can show the login page for
565 failed access to images */
566 http_setHeader(esp->web, "Content-Type: text/html", 0);
567 return false;
568 }
569 }
570 data_blob_free(&esp->web->output.content);
571 return true;
572 }
573
574
575 /*
576 handling of + and % escapes in http variables
577 */
578 static const char *http_unescape(TALLOC_CTX *mem_ctx, const char *p)
579 {
580 char *s0 = talloc_strdup(mem_ctx, p);
581 char *s = s0;
582 if (s == NULL) return NULL;
583
584 while (*s) {
585 unsigned v;
586 if (*s == '+') *s = ' ';
587 if (*s == '%' && sscanf(s+1, "%02x", &v) == 1) {
588 *s = (char)v;
589 memmove(s+1, s+3, strlen(s+3)+1);
590 }
591 s++;
592 }
593
594 return s0;
595 }
596
597 /*
598 set a form or GET variable
599 */
600 static void esp_putvar(struct esp_state *esp, const char *var, const char *value)
601 {
602 if (strcasecmp(var, SAMBA_SESSION_KEY) == 0) {
603 /* special case support for browsers without cookie
604 support */
605 esp->web->input.session_key = talloc_strdup(esp, value);
606 } else {
607 mprSetPropertyValue(&esp->variables[ESP_FORM_OBJ],
608 http_unescape(esp, var),
609 mprCreateStringVar(http_unescape(esp, value), 0));
610 }
611 }
612
613
614 /*
615 parse the variables in a POST style request
616 */
617 static NTSTATUS http_parse_post(struct esp_state *esp)
618 {
619 DATA_BLOB b = esp->web->input.partial;
620
621 while (b.length) {
622 char *p, *line;
623 size_t len;
624
625 p = memchr(b.data, '&', b.length);
626 if (p == NULL) {
627 len = b.length;
628 } else {
629 len = p - (char *)b.data;
630 }
631 line = talloc_strndup(esp, (char *)b.data, len);
632 NT_STATUS_HAVE_NO_MEMORY(line);
633
634 p = strchr(line,'=');
635 if (p) {
636 *p = 0;
637 esp_putvar(esp, line, p+1);
638 }
639 talloc_free(line);
640 b.length -= len;
641 b.data += len;
642 if (b.length > 0) {
643 b.length--;
644 b.data++;
645 }
646 }
647
648 return NT_STATUS_OK;
649 }
650
651 /*
652 parse the variables in a GET style request
653 */
654 static NTSTATUS http_parse_get(struct esp_state *esp)
655 {
656 struct websrv_context *web = esp->web;
657 char *p, *s, *tok;
658 char *pp;
659
660 p = strchr(web->input.url, '?');
661 web->input.query_string = p+1;
662 *p = 0;
663
664 s = talloc_strdup(esp, esp->web->input.query_string);
665 NT_STATUS_HAVE_NO_MEMORY(s);
666
667 for (tok=strtok_r(s,"&;", &pp);tok;tok=strtok_r(NULL,"&;", &pp)) {
668 p = strchr(tok,'=');
669 if (p) {
670 *p = 0;
671 esp_putvar(esp, tok, p+1);
672 }
673 }
674 return NT_STATUS_OK;
675 }
676
677 /*
678 called when a session times out
679 */
680 static void session_timeout(struct event_context *ev, struct timed_event *te,
681 struct timeval t, void *private)
682 {
683 struct session_data *s = talloc_get_type(private, struct session_data);
684 talloc_free(s);
685 }
686
687 /*
688 destroy a session
689 */
690 static int session_destructor(struct session_data *s)
691 {
692 DLIST_REMOVE(s->edata->sessions, s);
693 return 0;
694 }
695
696 /*
697 setup the session for this request
698 */
699 static void http_setup_session(struct esp_state *esp)
700 {
701 const char *session_key = SAMBA_SESSION_KEY;
702 char *p;
703 const char *cookie = esp->web->input.cookie;
704 const char *key = NULL;
705 struct esp_data *edata = talloc_get_type(esp->web->task->private, struct esp_data);
706 struct session_data *s;
707 bool generated_key = false;
708
709 /* look for our session key */
710 if (cookie && (p = strstr(cookie, session_key)) &&
711 p[strlen(session_key)] == '=') {
712 p += strlen(session_key)+1;
713 key = talloc_strndup(esp, p, strcspn(p, ";"));
714 }
715
716 if (key == NULL && esp->web->input.session_key) {
717 key = esp->web->input.session_key;
718 } else if (key == NULL) {
719 key = generate_random_str_list(esp, 16, "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ");
720 generated_key = true;
721 }
722
723 /* try to find this session in the existing session list */
724 for (s=edata->sessions;s;s=s->next) {
725 if (strcmp(key, s->id) == 0) {
726 break;
727 }
728 }
729
730 if (s == NULL) {
731 /* create a new session */
732 s = talloc_zero(edata, struct session_data);
733 s->id = talloc_steal(s, key);
734 s->data = NULL;
735 s->te = NULL;
736 s->edata = edata;
737 s->lifetime = lp_parm_int(esp->web->task->lp_ctx, NULL, "web", "sessiontimeout", 900);
738 DLIST_ADD(edata->sessions, s);
739 talloc_set_destructor(s, session_destructor);
740 if (!generated_key) {
741 mprSetPropertyValue(&esp->variables[ESP_REQUEST_OBJ],
742 "SESSION_EXPIRED", mprCreateStringVar("true", 0));
743 }
744 }
745
746 http_setCookie(esp->web, session_key, key, s->lifetime, "/", 0);
747
748 if (s->data) {
749 mprCopyVar(&esp->variables[ESP_SESSION_OBJ], s->data, MPR_DEEP_COPY);
750 }
751
752 esp->web->session = s;
753 }
754
755
756 /* callbacks for esp processing */
757 static const struct Esp esp_control = {
758 .maxScriptSize = 60000,
759 .writeBlock = http_writeBlock,
760 .setHeader = http_setHeader,
761 .redirect = http_redirect,
762 .setResponseCode = http_setResponseCode,
763 .readFile = http_readFileFromSwatDir,
764 .mapToStorage = http_mapToStorage,
765 .setCookie = http_setCookie,
766 .createSession = http_createSession,
767 .destroySession = http_destroySession,
768 .getSessionId = http_getSessionId
769 };
770
771 /*
772 process a complete http request
773 */
774 void http_process_input(struct websrv_context *web)
775 {
776 NTSTATUS status;
777 struct esp_state *esp = NULL;
778 struct esp_data *edata = talloc_get_type(web->task->private, struct esp_data);
779 struct smbcalls_context *smbcalls_ctx;
780 char *p;
781 void *save_mpr_ctx = mprMemCtx();
782 void *ejs_save = ejs_save_state();
783 int i;
784 const char *file_type = NULL;
785 enum page_type {
786 page_type_simple,
787 page_type_esp
788 };
789 enum page_type page_type;
790 const struct {
791 const char *extension;
792 const char *mime_type;
793 enum page_type page_type;
794 } mime_types[] = {
795 {"gif", "image/gif"},
796 {"png", "image/png"},
797 {"jpg", "image/jpeg"},
798 {"txt", "text/plain"},
799 {"ico", "image/x-icon"},
800 {"css", "text/css"},
801 {"esp", "text/html", true}
802 };
803
804 /*
805 * give the smbcalls a chance to find the event context
806 * and messaging context
807 */
808 smbcalls_ctx = talloc(web, struct smbcalls_context);
809 if (smbcalls_ctx == NULL) goto internal_error;
810 smbcalls_ctx->event_ctx = web->conn->event.ctx;
811 smbcalls_ctx->msg_ctx = web->conn->msg_ctx;
812
813 esp = talloc_zero(smbcalls_ctx, struct esp_state);
814 if (esp == NULL) goto internal_error;
815
816 esp->web = web;
817
818 mprSetCtx(esp);
819
820 if (espOpen(&esp_control) != 0) goto internal_error;
821
822 for (i=0;i<ARRAY_SIZE(esp->variables);i++) {
823 esp->variables[i] = mprCreateUndefinedVar();
824 }
825 esp->variables[ESP_HEADERS_OBJ] = mprCreateObjVar("headers", ESP_HASH_SIZE);
826 esp->variables[ESP_FORM_OBJ] = mprCreateObjVar("form", ESP_HASH_SIZE);
827 esp->variables[ESP_APPLICATION_OBJ] = mprCreateObjVar("application", ESP_HASH_SIZE);
828 esp->variables[ESP_COOKIES_OBJ] = mprCreateObjVar("cookies", ESP_HASH_SIZE);
829 esp->variables[ESP_FILES_OBJ] = mprCreateObjVar("files", ESP_HASH_SIZE);
830 esp->variables[ESP_REQUEST_OBJ] = mprCreateObjVar("request", ESP_HASH_SIZE);
831 esp->variables[ESP_SERVER_OBJ] = mprCreateObjVar("server", ESP_HASH_SIZE);
832 esp->variables[ESP_SESSION_OBJ] = mprCreateObjVar("session", ESP_HASH_SIZE);
833
834 if (edata->application_data) {
835 mprCopyVar(&esp->variables[ESP_APPLICATION_OBJ],
836 edata->application_data, MPR_DEEP_COPY);
837 }
838
839 smb_setup_ejs_functions(web_server_ejs_exception);
840
841 if (web->input.url == NULL) {
842 http_error(web, 400, "You must specify a GET or POST request");
843 mprSetCtx(save_mpr_ctx);
844 ejs_restore_state(ejs_save);
845 return;
846 }
847
848 /* parse any form or get variables */
849 if (web->input.post_request) {
850 status = http_parse_post(esp);
851 if (!NT_STATUS_IS_OK(status)) {
852 http_error(web, 400, "Malformed POST data");
853 mprSetCtx(save_mpr_ctx);
854 ejs_restore_state(ejs_save);
855 return;
856 }
857 }
858 if (strchr(web->input.url, '?')) {
859 status = http_parse_get(esp);
860 if (!NT_STATUS_IS_OK(status)) {
861 http_error(web, 400, "Malformed GET data");
862 mprSetCtx(save_mpr_ctx);
863 ejs_restore_state(ejs_save);
864 return;
865 }
866 }
867
868 http_setup_session(esp);
869
870 esp->req = espCreateRequest(web, web->input.url, esp->variables);
871 if (esp->req == NULL) goto internal_error;
872
873 p = strrchr(web->input.url, '.');
874 if (p == NULL) {
875 page_type = page_type_esp;
876 file_type = "text/html";
877 }
878 for (i=0;p && i<ARRAY_SIZE(mime_types);i++) {
879 if (strcmp(mime_types[i].extension, p+1) == 0) {
880 page_type = mime_types[i].page_type;
881 file_type = mime_types[i].mime_type;
882 }
883 }
884 if (file_type == NULL) {
885 page_type = page_type_simple;
886 file_type = "text/html";
887 }
888
889 /* setup basic headers */
890 http_setResponseCode(web, 200);
891 http_setHeader(web, talloc_asprintf(esp, "Date: %s",
892 http_timestring(esp, time(NULL))), 0);
893 http_setHeader(web, "Server: Samba", 0);
894 http_setHeader(web, "Connection: close", 0);
895 http_setHeader(web, talloc_asprintf(esp, "Content-Type: %s", file_type), 0);
896
897 http_setup_arrays(esp);
898
899 /*
900 * Do pre-authentication. If pre-authentication succeeds, do
901 * page-type-specific processing.
902 */
903 switch(page_type)
904 {
905 case page_type_simple:
906 if (http_preauth(esp)) {
907 http_simple_request(web);
908 }
909 break;
910
911 case page_type_esp:
912 if (http_preauth(esp)) {
913 esp_request(esp, web->input.url);
914 }
915 break;
916 }
917
918 if (web->conn == NULL) {
919 /* the connection has been terminated above us, probably
920 via a timeout */
921 goto internal_error;
922 }
923
924 if (!web->output.output_pending) {
925 http_output_headers(web);
926 EVENT_FD_WRITEABLE(web->conn->event.fde);
927 web->output.output_pending = true;
928 }
929
930 /* copy any application data to long term storage in edata */
931 talloc_free(edata->application_data);
932 edata->application_data = talloc_zero(edata, struct MprVar);
933 mprSetCtx(edata->application_data);
934 mprCopyVar(edata->application_data, &esp->variables[ESP_APPLICATION_OBJ],
935 MPR_DEEP_COPY);
936 mprSetCtx(esp);
937
938 /* copy any session data */
939 if (web->session) {
940 talloc_free(web->session->data);
941 web->session->data = talloc_zero(web->session, struct MprVar);
942 if (esp->variables[ESP_SESSION_OBJ].properties == NULL ||
943 esp->variables[ESP_SESSION_OBJ].properties[0].numItems == 0) {
944 talloc_free(web->session);
945 web->session = NULL;
946 } else {
947 mprSetCtx(web->session->data);
948 mprCopyVar(web->session->data, &esp->variables[ESP_SESSION_OBJ],
949 MPR_DEEP_COPY);
950 /* setup the timeout for the session data */
951 mprSetCtx(esp);
952 talloc_free(web->session->te);
953 web->session->te = event_add_timed(web->conn->event.ctx, web->session,
954 timeval_current_ofs(web->session->lifetime, 0),
955 session_timeout, web->session);
956 }
957 }
958
959 talloc_free(esp);
960 mprSetCtx(save_mpr_ctx);
961 ejs_restore_state(ejs_save);
962 return;
963
964 internal_error:
965 mprSetCtx(esp);
966 talloc_free(esp);
967 if (web->conn != NULL) {
968 http_error(web, 500, "Internal server error");
969 }
970 mprSetCtx(save_mpr_ctx);
971 ejs_restore_state(ejs_save);
972 }
973
974
975 /*
976 parse one line of header input
977 */
978 NTSTATUS http_parse_header(struct websrv_context *web, const char *line)
979 {
980 if (line[0] == 0) {
981 web->input.end_of_headers = true;
982 } else if (strncasecmp(line,"GET ", 4)==0) {
983 web->input.url = talloc_strndup(web, &line[4], strcspn(&line[4], " \t"));
984 } else if (strncasecmp(line,"POST ", 5)==0) {
985 web->input.post_request = true;
986 web->input.url = talloc_strndup(web, &line[5], strcspn(&line[5], " \t"));
987 } else if (strchr(line, ':') == NULL) {
988 http_error(web, 400, "This server only accepts GET and POST requests");
989 return NT_STATUS_INVALID_PARAMETER;
990 } else if (strncasecmp(line,"Content-Length: ", 16)==0) {
991 web->input.content_length = strtoul(&line[16], NULL, 10);
992 } else {
993 #define PULL_HEADER(v, s) do { \
994 if (strncmp(line, s, strlen(s)) == 0) { \
995 web->input.v = talloc_strdup(web, &line[strlen(s)]); \
996 return NT_STATUS_OK; \
997 } \
998 } while (0)
999 PULL_HEADER(content_type, "Content-Type: ");
1000 PULL_HEADER(user_agent, "User-Agent: ");
1001 PULL_HEADER(referer, "Referer: ");
1002 PULL_HEADER(host, "Host: ");
1003 PULL_HEADER(accept_encoding, "Accept-Encoding: ");
1004 PULL_HEADER(accept_language, "Accept-Language: ");
1005 PULL_HEADER(accept_charset, "Accept-Charset: ");
1006 PULL_HEADER(cookie, "Cookie: ");
1007 }
1008
1009 /* ignore all other headers for now */
1010 return NT_STATUS_OK;
1011 }
1012
1013
1014 /*
1015 setup the esp processor - called at task initialisation
1016 */
1017 NTSTATUS http_setup_esp(struct task_server *task)
1018 {
1019 struct esp_data *edata;
1020
1021 edata = talloc_zero(task, struct esp_data);
1022 NT_STATUS_HAVE_NO_MEMORY(edata);
1023
1024 task->private = edata;
1025
1026 edata->tls_params = tls_initialise(edata, task->lp_ctx);
1027 NT_STATUS_HAVE_NO_MEMORY(edata->tls_params);
1028
1029 return NT_STATUS_OK;
1030 }
WIP