7 #include <sys/socket.h>
10 #include <sys/ioctl.h>
11 #include <sys/epoll.h>
19 #include "mutexlock.h"
25 pthread_mutex_init(&mutex, NULL);
27 epoll_fd = epoll_create(1024); // Size argument is ignored.
37 pthread_create(&thread, NULL, Server::do_work_thunk, this);
40 void *Server::do_work_thunk(void *arg)
42 Server *server = static_cast<Server *>(arg);
47 void Server::do_work()
50 int nfds = epoll_wait(epoll_fd, events, EPOLL_MAX_EVENTS, EPOLL_TIMEOUT_MS);
52 MutexLock lock(&mutex); // We release the mutex between iterations.
58 for (int i = 0; i < nfds; ++i) {
59 int fd = events[i].data.fd;
60 assert(clients.count(fd) != 0);
61 Client *client = &clients[fd];
63 if (events[i].events & (EPOLLERR | EPOLLRDHUP | EPOLLHUP)) {
68 process_client(client);
73 void Server::add_client(int sock)
75 MutexLock lock(&mutex);
77 new_client.sock = sock;
78 new_client.client_request.reserve(1024);
79 new_client.state = Client::READING_REQUEST;
80 new_client.header_bytes_sent = 0;
81 new_client.bytes_sent = 0;
83 clients.insert(make_pair(sock, new_client));
85 // Start listening on data from this socket.
87 ev.events = EPOLLIN | EPOLLRDHUP;
89 if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, sock, &ev) == -1) {
90 perror("epoll_ctl(EPOLL_CTL_ADD)");
95 void Server::add_stream(const string &stream_id)
100 void Server::set_header(const string &stream_id, const string &header)
103 printf("got header! %lu bytes\n", header.size());
106 void Server::add_data(const string &stream_id, const char *data, size_t bytes)
111 void Server::process_client(Client *client)
113 switch (client->state) {
114 case Client::READING_REQUEST: {
115 // Try to read more of the request.
117 int ret = read(client->sock, buf, sizeof(buf));
120 close_client(client);
124 // No data? This really means that we were triggered for something else than
125 // POLLIN (which suggests a logic error in epoll).
126 fprintf(stderr, "WARNING: fd %d returned unexpectedly 0 bytes!\n", client->sock);
127 close_client(client);
131 // Guard against overlong requests gobbling up all of our space.
132 if (client->client_request.size() + ret > MAX_CLIENT_REQUEST) {
133 fprintf(stderr, "WARNING: fd %d sent overlong request!\n", client->sock);
134 close_client(client);
138 // See if we have \r\n\r\n anywhere in the request. We start three bytes
139 // before what we just appended, in case we just got the final character.
140 size_t existing_req_bytes = client->client_request.size();
141 client->client_request.append(string(buf, buf + ret));
143 size_t start_at = (existing_req_bytes >= 3 ? existing_req_bytes - 3 : 0);
144 const char *ptr = reinterpret_cast<char *>(
145 memmem(client->client_request.data() + start_at, client->client_request.size() - start_at,
148 // OK, we don't have the entire header yet. Fine; we'll get it later.
152 if (ptr != client->client_request.data() + client->client_request.size() - 4) {
153 fprintf(stderr, "WARNING: fd %d had junk data after request!\n", client->sock);
154 close_client(client);
158 client->state = Client::SENDING_HEADER;
161 ev.events = EPOLLOUT | EPOLLRDHUP;
162 ev.data.fd = client->sock;
164 if (epoll_ctl(epoll_fd, EPOLL_CTL_MOD, client->sock, &ev) == -1) {
165 perror("epoll_ctl(EPOLL_CTL_MOD)");
176 void Server::close_client(Client *client)
178 if (epoll_ctl(epoll_fd, EPOLL_CTL_DEL, client->sock, NULL) == -1) {
179 perror("epoll_ctl(EPOLL_CTL_DEL)");
185 clients.erase(client->sock);