Implement header sending.
authorSteinar H. Gunderson <sgunderson@bigfoot.com>
Sat, 6 Apr 2013 15:47:44 +0000 (17:47 +0200)
committerSteinar H. Gunderson <sgunderson@bigfoot.com>
Sat, 6 Apr 2013 15:47:44 +0000 (17:47 +0200)
server.cpp
server.h

index 25da16c..0b399e4 100644 (file)
@@ -94,13 +94,15 @@ void Server::add_client(int sock)
        
 void Server::add_stream(const string &stream_id)
 {
-       // TODO
+       MutexLock lock(&mutex);
+       streams.insert(make_pair(stream_id, Stream()));
 }
        
 void Server::set_header(const string &stream_id, const string &header)
 {
-       // TODO
-       printf("got header! %lu bytes\n", header.size());
+       MutexLock lock(&mutex);
+       assert(streams.count(stream_id) != 0);
+       streams[stream_id].header = header;
 }
        
 void Server::add_data(const string &stream_id, const char *data, size_t bytes)
@@ -155,23 +157,62 @@ void Server::process_client(Client *client)
                        return;
                }
 
-               client->state = Client::SENDING_HEADER;
-
-               epoll_event ev;
-               ev.events = EPOLLOUT | EPOLLRDHUP;
-               ev.data.fd = client->sock;
+               parse_request(client);
+               break;
+       }
+       case Client::SENDING_HEADER: {
+               int ret = write(client->sock,
+                               client->header.data() + client->header_bytes_sent,
+                               client->header.size() - client->header_bytes_sent);
+               if (ret == -1) {
+                       perror("write");
+                       close_client(client);
+                       return;
+               }
+               
+               client->header_bytes_sent += ret;
+               assert(client->header_bytes_sent <= client->header.size());
 
-               if (epoll_ctl(epoll_fd, EPOLL_CTL_MOD, client->sock, &ev) == -1) {
-                       perror("epoll_ctl(EPOLL_CTL_MOD)");
-                       exit(1);
+               if (client->header_bytes_sent < client->header.size()) {
+                       // We haven't sent all yet. Fine; we'll do that later.
+                       return;
                }
-               break;
+
+               // We're done sending the header! Clear the entire header to release some memory.
+               client->header.clear();
+
+               // Start sending from the end. In other words, we won't send any of the backlog,
+               // but we'll start sending immediately as we get data.
+               client->state = Client::SENDING_DATA;
+               client->bytes_sent = streams[client->stream_id].data_size;
        }
        default:
                // TODO
                assert(false);
        }
 }
+
+void Server::parse_request(Client *client)
+{
+       // TODO: Actually parse the request. :-)
+       client->stream_id = "stream";
+
+       // Construct the header.
+       client->header = "HTTP/1.0 200 OK\r\nContent-type: todo/fixme\r\n\r\n" +
+               streams[client->stream_id].header;
+
+       // Switch states.
+       client->state = Client::SENDING_HEADER;
+
+       epoll_event ev;
+       ev.events = EPOLLOUT | EPOLLRDHUP;
+       ev.data.fd = client->sock;
+
+       if (epoll_ctl(epoll_fd, EPOLL_CTL_MOD, client->sock, &ev) == -1) {
+               perror("epoll_ctl(EPOLL_CTL_MOD)");
+               exit(1);
+       }
+}
        
 void Server::close_client(Client *client)
 {
index c44b81e..f1cc7a0 100644 (file)
--- a/server.h
+++ b/server.h
@@ -23,11 +23,14 @@ struct Client {
        // this might not be finished.
        std::string client_request;
 
-#if 0
        // What stream we're connecting to; parsed from client_request.
        // Not relevant for READING_REQUEST.
-       string stream_id;
-#endif
+       std::string stream_id;
+
+       // The header we want to send. This is nominally a copy of Stream::header,
+       // but since that might change on reconnects etc., we keep a local copy here.
+       // Only relevant for SENDING_HEADER; blank otherwise.
+       std::string header;
 
        // Number of bytes we've sent of the header. Only relevant for SENDING_HEADER.
        size_t header_bytes_sent;
@@ -61,8 +64,14 @@ public:
 
 private:
        void process_client(Client *client);
+
+       // Close a given client socket, and clean up after it.
        void close_client(Client *client);
 
+       // Parse the HTTP request, construct the header, and set the client into
+       // the SENDING_HEADER state.
+       void parse_request(Client *client);
+
        pthread_mutex_t mutex;
 
        // Map from stream ID to stream.