2 * Copyright 2016 IoT.bzh
3 * Author: José Bollo <jose.bollo@iot.bzh>
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
27 #include <microhttpd.h>
29 #include "local-def.h"
30 #include "afb-method.h"
32 #include "afb-websock.h"
35 #include "afb-req-itf.h"
37 #define JSON_CONTENT "application/json"
38 #define FORM_CONTENT MHD_HTTP_POST_ENCODING_MULTIPART_FORMDATA
40 struct afb_hsrv_handler {
41 struct afb_hsrv_handler *next;
44 int (*handler) (struct afb_hreq *, void *);
51 const char *directory;
56 int afb_hreq_one_page_api_redirect(
57 struct afb_hreq *hreq,
63 if (hreq->lentail >= 2 && hreq->tail[1] == '#')
66 * Here we have for example:
67 * url = "/pre/dir/page" lenurl = 13
68 * tail = "/dir/page" lentail = 9
70 * We will produce "/pre/#!dir/page"
72 * Let compute plen that include the / at end (for "/pre/")
74 plen = hreq->lenurl - hreq->lentail + 1;
75 url = alloca(hreq->lenurl + 3);
76 memcpy(url, hreq->url, plen);
79 memcpy(&url[plen], &hreq->tail[1], hreq->lentail);
80 return afb_hreq_redirect_to(hreq, url);
83 static struct afb_hsrv_handler *new_handler(
84 struct afb_hsrv_handler *head,
86 int (*handler) (struct afb_hreq *, void *),
90 struct afb_hsrv_handler *link, *iter, *previous;
93 /* get the length of the prefix without its leading / */
94 length = strlen(prefix);
95 while (length && prefix[length - 1] == '/')
98 /* allocates the new link */
99 link = malloc(sizeof *link);
104 link->prefix = prefix;
105 link->length = length;
106 link->handler = handler;
108 link->priority = priority;
113 while (iter && (priority < iter->priority || (priority == iter->priority && length <= iter->length))) {
118 if (previous == NULL)
120 previous->next = link;
124 int afb_hsrv_add_handler(
125 AFB_session * session,
127 int (*handler) (struct afb_hreq *, void *),
131 struct afb_hsrv_handler *head;
133 head = new_handler(session->handlers, prefix, handler, data, priority);
136 session->handlers = head;
140 static const char uuid_header[] = "x-afb-uuid";
141 static const char uuid_arg[] = "uuid";
142 static const char uuid_cookie[] = "uuid";
144 static struct AFB_clientCtx *afb_hreq_context(struct afb_hreq *hreq)
148 if (hreq->context == NULL) {
149 uuid = afb_hreq_get_header(hreq, uuid_header);
151 uuid = afb_hreq_get_argument(hreq, uuid_arg);
153 uuid = afb_hreq_get_cookie(hreq, uuid_cookie);
154 hreq->context = ctxClientGet(uuid);
156 return hreq->context;
159 static int afb_hreq_websocket_switch(struct afb_hreq *hreq, void *data)
163 afb_hreq_context(hreq);
164 if (hreq->lentail != 0 || !afb_websock_check(hreq, &later))
168 struct afb_websock *ws = afb_websock_create(hreq->connection);
178 static int afb_hreq_rest_api(struct afb_hreq *hreq, void *data)
180 const char *api, *verb;
181 size_t lenapi, lenverb;
183 api = &hreq->tail[strspn(hreq->tail, "/")];
184 lenapi = strcspn(api, "/");
186 verb = &verb[strspn(verb, "/")];
187 lenverb = strcspn(verb, "/");
189 if (!(*api && *verb && lenapi && lenverb))
192 return afb_apis_handle(afb_hreq_to_req(hreq), api, lenapi, verb, lenverb);
195 static int handle_alias(struct afb_hreq *hreq, void *data)
197 struct afb_diralias *da = data;
199 if (hreq->method != afb_method_get) {
200 afb_hreq_reply_error(hreq, MHD_HTTP_METHOD_NOT_ALLOWED);
204 if (!afb_hreq_valid_tail(hreq)) {
205 afb_hreq_reply_error(hreq, MHD_HTTP_FORBIDDEN);
209 return afb_hreq_reply_file(hreq, da->dirfd, &hreq->tail[1]);
212 int afb_hsrv_add_alias(AFB_session * session, const char *prefix, const char *alias, int priority)
214 struct afb_diralias *da;
217 dirfd = open(alias, O_PATH|O_DIRECTORY);
222 da = malloc(sizeof *da);
225 da->directory = alias;
226 da->lendir = strlen(da->directory);
228 if (afb_hsrv_add_handler(session, prefix, handle_alias, da, priority))
236 void afb_hsrv_reply_error(struct MHD_Connection *connection, unsigned int status)
240 struct MHD_Response *response;
242 length = asprintf(&buffer, "<html><body>error %u</body></html>", status);
244 response = MHD_create_response_from_buffer((unsigned)length, buffer, MHD_RESPMEM_MUST_FREE);
246 buffer = "<html><body>error</body></html>";
247 response = MHD_create_response_from_buffer(strlen(buffer), buffer, MHD_RESPMEM_PERSISTENT);
249 if (!MHD_queue_response(connection, status, response))
250 fprintf(stderr, "Failed to reply error code %u", status);
251 MHD_destroy_response(response);
254 static int postproc(void *cls,
255 enum MHD_ValueKind kind,
257 const char *filename,
258 const char *content_type,
259 const char *transfer_encoding,
264 struct afb_hreq *hreq = cls;
265 if (filename != NULL)
266 return afb_hreq_post_add_file(hreq, key, filename, data, size);
268 return afb_hreq_post_add(hreq, key, data, size);
271 static int access_handler(
273 struct MHD_Connection *connection,
275 const char *methodstr,
277 const char *upload_data,
278 size_t *upload_data_size,
282 struct afb_hreq *hreq;
283 enum afb_method method;
284 AFB_session *session;
285 struct afb_hsrv_handler *iter;
291 /* create the request */
292 hreq = calloc(1, sizeof *hreq);
298 method = get_method(methodstr);
299 method &= afb_method_get | afb_method_post;
300 if (method == afb_method_none)
303 /* init the request */
305 hreq->connection = connection;
306 hreq->method = method;
307 hreq->version = version;
308 hreq->tail = hreq->url = url;
309 hreq->lentail = hreq->lenurl = strlen(url);
311 /* init the post processing */
312 if (method == afb_method_post) {
313 type = afb_hreq_get_header(hreq, MHD_HTTP_HEADER_CONTENT_TYPE);
315 /* an empty post, let's process it as a get */
316 hreq->method = afb_method_get;
317 } else if (strcasestr(type, FORM_CONTENT) != NULL) {
318 hreq->postform = MHD_create_post_processor (connection, 65500, postproc, hreq);
319 if (hreq->postform == NULL)
321 } else if (strcasestr(type, JSON_CONTENT) == NULL) {
322 afb_hsrv_reply_error(connection, MHD_HTTP_UNSUPPORTED_MEDIA_TYPE);
328 /* process further data */
329 if (*upload_data_size) {
330 if (hreq->postform != NULL) {
331 if (!MHD_post_process (hreq->postform, upload_data, *upload_data_size))
334 if (!afb_hreq_post_add(hreq, NULL, upload_data, *upload_data_size))
337 *upload_data_size = 0;
342 afb_hreq_post_end(hreq);
343 if (hreq->postform != NULL) {
344 rc = MHD_destroy_post_processor(hreq->postform);
345 hreq->postform = NULL;
350 /* search an handler for the request */
351 iter = session->handlers;
353 if (afb_hreq_unprefix(hreq, iter->prefix, iter->length)) {
354 if (iter->handler(hreq, iter->data))
356 hreq->tail = hreq->url;
357 hreq->lentail = hreq->lenurl;
363 afb_hreq_reply_error(hreq, MHD_HTTP_NOT_FOUND);
367 afb_hsrv_reply_error(connection, MHD_HTTP_BAD_REQUEST);
371 afb_hsrv_reply_error(connection, MHD_HTTP_INTERNAL_SERVER_ERROR);
375 /* Because of POST call multiple time requestApi we need to free POST handle here */
376 static void end_handler(void *cls, struct MHD_Connection *connection, void **recordreq,
377 enum MHD_RequestTerminationCode toe)
379 AFB_session *session;
380 struct afb_hreq *hreq;
386 if (hreq->postform != NULL)
387 MHD_destroy_post_processor(hreq->postform);
388 afb_hreq_drop_data(hreq);
393 static int new_client_handler(void *cls, const struct sockaddr *addr, socklen_t addrlen)
398 #if defined(USE_MAGIC_MIME_TYPE)
400 #if !defined(MAGIC_DB)
401 #define MAGIC_DB "/usr/share/misc/magic.mgc"
404 static int init_lib_magic (AFB_session *session)
406 /* MAGIC_MIME tells magic to return a mime of the file, but you can specify different things */
408 printf("Loading mimetype default magic database\n");
410 session->magic = magic_open(MAGIC_MIME_TYPE);
411 if (session->magic == NULL) {
412 fprintf(stderr,"ERROR: unable to initialize magic library\n");
416 /* Warning: should not use NULL for DB [libmagic bug wont pass efence check] */
417 if (magic_load(session->magic, MAGIC_DB) != 0) {
418 fprintf(stderr,"cannot load magic database - %s\n", magic_error(session->magic));
419 magic_close(session->magic);
420 session->magic = NULL;
428 static int my_default_init(AFB_session * session)
432 if (!afb_hsrv_add_handler(session, session->config->rootapi, afb_hreq_websocket_switch, NULL, 20))
435 if (!afb_hsrv_add_handler(session, session->config->rootapi, afb_hreq_rest_api, NULL, 10))
438 for (idx = 0; session->config->aliasdir[idx].url != NULL; idx++)
439 if (!afb_hsrv_add_alias (session, session->config->aliasdir[idx].url, session->config->aliasdir[idx].path, 0))
442 if (!afb_hsrv_add_alias(session, "", session->config->rootdir, -10))
445 if (!afb_hsrv_add_handler(session, session->config->rootbase, afb_hreq_one_page_api_redirect, NULL, -20))
451 AFB_error httpdStart(AFB_session * session)
453 if (!my_default_init(session)) {
454 printf("Error: initialisation of httpd failed");
458 #if defined(USE_MAGIC_MIME_TYPE)
459 /*TBD open libmagic cache [fail to pass EFENCE check (allocating 0 bytes)] */
460 init_lib_magic (session);
464 printf("AFB:notice Waiting port=%d rootdir=%s\n", session->config->httpdPort, session->config->rootdir);
465 printf("AFB:notice Browser URL= http:/*localhost:%d\n", session->config->httpdPort);
468 session->httpd = MHD_start_daemon(
469 MHD_USE_EPOLL_LINUX_ONLY | MHD_USE_TCP_FASTOPEN | MHD_USE_DEBUG | MHD_USE_SUSPEND_RESUME,
470 (uint16_t) session->config->httpdPort, /* port */
471 new_client_handler, NULL, /* Tcp Accept call back + extra attribute */
472 access_handler, session, /* Http Request Call back + extra attribute */
473 MHD_OPTION_NOTIFY_COMPLETED, end_handler, session,
474 MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int)15, /* 15 seconds */
475 MHD_OPTION_END); /* options-end */
477 if (session->httpd == NULL) {
478 printf("Error: httpStart invalid httpd port: %d", session->config->httpdPort);
485 AFB_error httpdLoop(AFB_session * session)
488 const union MHD_DaemonInfo *info;
491 info = MHD_get_daemon_info(session->httpd, MHD_DAEMON_INFO_EPOLL_FD_LINUX_ONLY);
493 printf("Error: httpLoop no pollfd");
496 pfd.fd = info->listen_fd;
500 fprintf(stderr, "AFB:notice entering httpd waiting loop\n");
503 fprintf(stderr, "AFB:notice httpd alive [%d]\n", count++);
504 poll(&pfd, 1, 15000); /* 15 seconds (as above timeout when starting) */
505 MHD_run(session->httpd);
509 /* should never return from here */
513 int httpdStatus(AFB_session * session)
515 return MHD_run(session->httpd);
518 void httpdStop(AFB_session * session)
520 MHD_stop_daemon(session->httpd);