2 * Copyright (C) 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.
29 #include <microhttpd.h>
30 #include <systemd/sd-event.h>
32 #include "afb-method.h"
33 #include "afb-context.h"
36 #include <afb/afb-req-itf.h>
38 #include "locale-root.h"
40 #include "afb-common.h"
44 #define JSON_CONTENT "application/json"
45 #define FORM_CONTENT MHD_HTTP_POST_ENCODING_MULTIPART_FORMDATA
49 struct hsrv_handler *next;
52 int (*handler) (struct afb_hreq *, void *);
58 struct locale_root *root;
64 struct hsrv_handler *handlers;
65 struct MHD_Daemon *httpd;
66 sd_event_source *evsrc;
71 static int global_reqids = 0;
73 static void reply_error(struct MHD_Connection *connection, unsigned int status)
75 struct MHD_Response *response = MHD_create_response_from_buffer(0, NULL, MHD_RESPMEM_PERSISTENT);
76 MHD_queue_response(connection, status, response);
77 MHD_destroy_response(response);
80 static int postproc(void *cls,
81 enum MHD_ValueKind kind,
84 const char *content_type,
85 const char *transfer_encoding,
90 struct afb_hreq *hreq = cls;
92 return afb_hreq_post_add_file(hreq, key, filename, data, size);
94 return afb_hreq_post_add(hreq, key, data, size);
97 static int access_handler(
99 struct MHD_Connection *connection,
101 const char *methodstr,
103 const char *upload_data,
104 size_t *upload_data_size,
108 struct afb_hreq *hreq;
109 enum afb_method method;
110 struct afb_hsrv *hsrv;
111 struct hsrv_handler *iter;
118 method = get_method(methodstr);
119 method &= afb_method_get | afb_method_post;
120 if (method == afb_method_none) {
121 reply_error(connection, MHD_HTTP_BAD_REQUEST);
125 /* create the request */
126 hreq = calloc(1, sizeof *hreq);
128 reply_error(connection, MHD_HTTP_INTERNAL_SERVER_ERROR);
132 /* init the request */
135 hreq->cacheTimeout = hsrv->cache_to;
136 hreq->reqid = ++global_reqids;
140 hreq->connection = connection;
141 hreq->method = method;
142 hreq->version = version;
143 hreq->lang = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, MHD_HTTP_HEADER_ACCEPT_LANGUAGE);
144 hreq->tail = hreq->url = url;
145 hreq->lentail = hreq->lenurl = strlen(url);
148 /* init the post processing */
149 if (method == afb_method_post) {
150 type = afb_hreq_get_header(hreq, MHD_HTTP_HEADER_CONTENT_TYPE);
152 /* an empty post, let's process it as a get */
153 hreq->method = afb_method_get;
154 } else if (strcasestr(type, FORM_CONTENT) != NULL) {
155 hreq->postform = MHD_create_post_processor (connection, 65500, postproc, hreq);
156 if (hreq->postform == NULL)
157 afb_hreq_reply_error(hreq, MHD_HTTP_INTERNAL_SERVER_ERROR);
159 } else if (strcasestr(type, JSON_CONTENT) != NULL) {
162 afb_hreq_reply_error(hreq, MHD_HTTP_UNSUPPORTED_MEDIA_TYPE);
168 /* process further data */
169 if (*upload_data_size) {
170 if (hreq->postform != NULL) {
171 if (!MHD_post_process (hreq->postform, upload_data, *upload_data_size)) {
172 afb_hreq_reply_error(hreq, MHD_HTTP_INTERNAL_SERVER_ERROR);
176 if (!afb_hreq_post_add(hreq, "", upload_data, *upload_data_size)) {
177 afb_hreq_reply_error(hreq, MHD_HTTP_INTERNAL_SERVER_ERROR);
181 *upload_data_size = 0;
186 if (hreq->postform != NULL) {
187 rc = MHD_destroy_post_processor(hreq->postform);
188 hreq->postform = NULL;
190 afb_hreq_reply_error(hreq, MHD_HTTP_BAD_REQUEST);
195 if (hreq->scanned != 0) {
196 if (hreq->replied == 0 && hreq->suspended == 0) {
197 MHD_suspend_connection (connection);
203 /* search an handler for the request */
205 iter = hsrv->handlers;
207 if (afb_hreq_unprefix(hreq, iter->prefix, iter->length)) {
208 if (iter->handler(hreq, iter->data)) {
209 if (hreq->replied == 0 && hreq->suspended == 0) {
210 MHD_suspend_connection (connection);
215 hreq->tail = hreq->url;
216 hreq->lentail = hreq->lenurl;
222 afb_hreq_reply_error(hreq, MHD_HTTP_NOT_FOUND);
226 /* Because of POST call multiple time requestApi we need to free POST handle here */
227 static void end_handler(void *cls, struct MHD_Connection *connection, void **recordreq,
228 enum MHD_RequestTerminationCode toe)
230 struct afb_hreq *hreq;
234 MHD_suspend_connection (connection);
235 afb_hreq_unref(hreq);
238 void run_micro_httpd(struct afb_hsrv *hsrv)
240 if (hsrv->in_run != 0)
243 sd_event_source_set_io_events(hsrv->evsrc, 0);
246 MHD_run(hsrv->httpd);
247 } while(hsrv->in_run == 2);
249 sd_event_source_set_io_events(hsrv->evsrc, EPOLLIN);
253 static int io_event_callback(sd_event_source *src, int fd, uint32_t revents, void *hsrv)
255 run_micro_httpd(hsrv);
259 static int new_client_handler(void *cls, const struct sockaddr *addr, socklen_t addrlen)
264 static struct hsrv_handler *new_handler(
265 struct hsrv_handler *head,
267 int (*handler) (struct afb_hreq *, void *),
271 struct hsrv_handler *link, *iter, *previous;
274 /* get the length of the prefix without its leading / */
275 length = strlen(prefix);
276 while (length && prefix[length - 1] == '/')
279 /* allocates the new link */
280 link = malloc(sizeof *link);
285 link->prefix = prefix;
286 link->length = length;
287 link->handler = handler;
289 link->priority = priority;
294 while (iter && (priority < iter->priority || (priority == iter->priority && length <= iter->length))) {
299 if (previous == NULL)
301 previous->next = link;
305 static int handle_alias(struct afb_hreq *hreq, void *data)
308 struct hsrv_alias *da = data;
309 struct locale_search *search;
311 if (hreq->method != afb_method_get) {
314 afb_hreq_reply_error(hreq, MHD_HTTP_METHOD_NOT_ALLOWED);
318 search = locale_root_search(da->root, hreq->lang, 0);
319 rc = afb_hreq_reply_locale_file_if_exist(hreq, search, &hreq->tail[1]);
320 locale_search_unref(search);
324 afb_hreq_reply_error(hreq, MHD_HTTP_NOT_FOUND);
329 int afb_hsrv_add_handler(
330 struct afb_hsrv *hsrv,
332 int (*handler) (struct afb_hreq *, void *),
336 struct hsrv_handler *head;
338 head = new_handler(hsrv->handlers, prefix, handler, data, priority);
341 hsrv->handlers = head;
345 int afb_hsrv_add_alias_root(struct afb_hsrv *hsrv, const char *prefix, struct locale_root *root, int priority, int relax)
347 struct hsrv_alias *da;
349 da = malloc(sizeof *da);
353 if (afb_hsrv_add_handler(hsrv, prefix, handle_alias, da, priority)) {
354 locale_root_addref(root);
362 int afb_hsrv_add_alias(struct afb_hsrv *hsrv, const char *prefix, int dirfd, const char *alias, int priority, int relax)
364 struct locale_root *root;
367 root = locale_root_create_at(dirfd, alias);
372 rc = afb_hsrv_add_alias_root(hsrv, prefix, root, priority, relax);
373 locale_root_unref(root);
378 int afb_hsrv_set_cache_timeout(struct afb_hsrv *hsrv, int duration)
383 rc = asprintf(&dur, "%d", duration);
387 free(hsrv->cache_to);
388 hsrv->cache_to = dur;
392 int afb_hsrv_start(struct afb_hsrv *hsrv, uint16_t port, unsigned int connection_timeout)
394 sd_event_source *evsrc;
396 struct MHD_Daemon *httpd;
397 const union MHD_DaemonInfo *info;
399 httpd = MHD_start_daemon(
400 MHD_USE_EPOLL_LINUX_ONLY | MHD_USE_TCP_FASTOPEN | MHD_USE_DEBUG | MHD_USE_SUSPEND_RESUME,
402 new_client_handler, NULL, /* Tcp Accept call back + extra attribute */
403 access_handler, hsrv, /* Http Request Call back + extra attribute */
404 MHD_OPTION_NOTIFY_COMPLETED, end_handler, hsrv,
405 MHD_OPTION_CONNECTION_TIMEOUT, connection_timeout,
406 MHD_OPTION_END); /* options-end */
409 ERROR("httpStart invalid httpd port: %d", (int)port);
413 info = MHD_get_daemon_info(httpd, MHD_DAEMON_INFO_EPOLL_FD_LINUX_ONLY);
415 MHD_stop_daemon(httpd);
416 ERROR("httpStart no pollfd");
420 rc = sd_event_add_io(afb_common_get_event_loop(), &evsrc, info->listen_fd, EPOLLIN, io_event_callback, hsrv);
422 MHD_stop_daemon(httpd);
424 ERROR("connection to events for httpd failed");
433 void afb_hsrv_stop(struct afb_hsrv *hsrv)
435 if (hsrv->evsrc != NULL) {
436 sd_event_source_unref(hsrv->evsrc);
439 if (hsrv->httpd != NULL)
440 MHD_stop_daemon(hsrv->httpd);
444 struct afb_hsrv *afb_hsrv_create()
446 struct afb_hsrv *result = calloc(1, sizeof(struct afb_hsrv));
448 result->refcount = 1;
452 void afb_hsrv_put(struct afb_hsrv *hsrv)
454 assert(hsrv->refcount != 0);
455 if (!--hsrv->refcount) {