X-Git-Url: https://git.sesse.net/?p=cubemap;a=blobdiff_plain;f=server.cpp;h=1f5477e9baa92066bbf2d8736e27901d32d2c9eb;hp=c9b942f2c686e19a5d06682eb79075f7e59defad;hb=845934ca50eee40884e8cc85ea81eb310efa5ca3;hpb=c5cdeee3a4c99abbf7303b47634b0a748e50bcb4

diff --git a/server.cpp b/server.cpp
index c9b942f..1f5477e 100644
--- a/server.cpp
+++ b/server.cpp
@@ -1,174 +1,36 @@
-#include <stdio.h>
-#include <string.h>
-#include <stdint.h>
-#include <unistd.h>
 #include <assert.h>
-#include <arpa/inet.h>
-#include <sys/socket.h>
+#include <errno.h>
+#include <netinet/in.h>
 #include <pthread.h>
-#include <sys/types.h>
-#include <sys/ioctl.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include <sys/epoll.h>
 #include <sys/sendfile.h>
-#include <time.h>
-#include <signal.h>
-#include <errno.h>
-#include <vector>
-#include <string>
-#include <map>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
 #include <algorithm>
+#include <map>
+#include <string>
+#include <utility>
+#include <vector>
 
+#include "accesslog.h"
+#include "log.h"
 #include "markpool.h"
 #include "metacube.h"
-#include "server.h"
 #include "mutexlock.h"
 #include "parse.h"
-#include "util.h"
+#include "server.h"
 #include "state.pb.h"
+#include "stream.h"
+#include "util.h"
 
 using namespace std;
 
-Client::Client(int sock)
-	: sock(sock),
-	  fwmark(0),
-	  connect_time(time(NULL)),
-	  state(Client::READING_REQUEST),
-	  stream(NULL),
-	  header_or_error_bytes_sent(0),
-	  bytes_sent(0)
-{
-	request.reserve(1024);
-
-	// Find the remote address, and convert it to ASCII.
-	sockaddr_in6 addr;
-	socklen_t addr_len = sizeof(addr);
-
-	if (getpeername(sock, reinterpret_cast<sockaddr *>(&addr), &addr_len) == -1) {
-		perror("getpeername");
-		remote_addr = "";
-	} else {
-		char buf[INET6_ADDRSTRLEN];
-		if (inet_ntop(addr.sin6_family, &addr.sin6_addr, buf, sizeof(buf)) == NULL) {
-			perror("inet_ntop");
-			remote_addr = "";
-		} else {
-			remote_addr = buf;
-		}
-	}
-}
-	
-Client::Client(const ClientProto &serialized, Stream *stream)
-	: sock(serialized.sock()),
-	  remote_addr(serialized.remote_addr()),
-	  connect_time(serialized.connect_time()),
-	  state(State(serialized.state())),
-	  request(serialized.request()),
-	  stream_id(serialized.stream_id()),
-	  stream(stream),
-	  header_or_error(serialized.header_or_error()),
-	  header_or_error_bytes_sent(serialized.header_or_error_bytes_sent()),
-	  bytes_sent(serialized.bytes_sent())
-{
-	if (stream->mark_pool != NULL) {
-		fwmark = stream->mark_pool->get_mark();
-	} else {
-		fwmark = 0;  // No mark.
-	}
-	if (setsockopt(sock, SOL_SOCKET, SO_MARK, &fwmark, sizeof(fwmark)) == -1) {
-		if (fwmark != 0) {
-			perror("setsockopt(SO_MARK)");
-		}
-	}
-}
-
-ClientProto Client::serialize() const
-{
-	ClientProto serialized;
-	serialized.set_sock(sock);
-	serialized.set_remote_addr(remote_addr);
-	serialized.set_connect_time(connect_time);
-	serialized.set_state(state);
-	serialized.set_request(request);
-	serialized.set_stream_id(stream_id);
-	serialized.set_header_or_error(header_or_error);
-	serialized.set_header_or_error_bytes_sent(serialized.header_or_error_bytes_sent());
-	serialized.set_bytes_sent(bytes_sent);
-	return serialized;
-}
-	
-ClientStats Client::get_stats() const
-{
-	ClientStats stats;
-	stats.stream_id = stream_id;
-	stats.remote_addr = remote_addr;
-	stats.connect_time = connect_time;
-	stats.bytes_sent = bytes_sent;
-	return stats;
-}
-
-Stream::Stream(const string &stream_id)
-	: stream_id(stream_id),
-	  data_fd(make_tempfile("")),
-	  data_size(0),
-	  mark_pool(NULL)
-{
-	if (data_fd == -1) {
-		exit(1);
-	}
-}
-
-Stream::~Stream()
-{
-	if (data_fd != -1) {
-		int ret;
-		do {
-			ret = close(data_fd);
-		} while (ret == -1 && errno == EINTR);
-		if (ret == -1) {
-			perror("close");
-		}
-	}
-}
-
-Stream::Stream(const StreamProto &serialized)
-	: stream_id(serialized.stream_id()),
-	  header(serialized.header()),
-	  data_fd(make_tempfile(serialized.data())),
-	  data_size(serialized.data_size()),
-	  mark_pool(NULL)
-{
-	if (data_fd == -1) {
-		exit(1);
-	}
-}
-
-StreamProto Stream::serialize()
-{
-	StreamProto serialized;
-	serialized.set_header(header);
-	if (!read_tempfile(data_fd, serialized.mutable_data())) {  // Closes data_fd.
-		exit(1);
-	}
-	serialized.set_data_size(data_size);
-	serialized.set_stream_id(stream_id);
-	data_fd = -1;
-	return serialized;
-}
-
-void Stream::put_client_to_sleep(Client *client)
-{
-	sleeping_clients.push_back(client);
-}
-
-void Stream::wake_up_all_clients()
-{
-	if (to_process.empty()) {
-		swap(sleeping_clients, to_process);
-	} else {
-		to_process.insert(to_process.end(), sleeping_clients.begin(), sleeping_clients.end());
-		sleeping_clients.clear();
-	}
-}
+extern AccessLogThread *access_log;
 
 Server::Server()
 {
@@ -177,21 +39,18 @@ Server::Server()
 
 	epoll_fd = epoll_create(1024);  // Size argument is ignored.
 	if (epoll_fd == -1) {
-		perror("epoll_fd");
+		log_perror("epoll_fd");
 		exit(1);
 	}
 }
 
 Server::~Server()
 {
-	int ret;
-	do {
-		ret = close(epoll_fd);
-	} while (ret == -1 && errno == EINTR);
-
-	if (ret == -1) {
-		perror("close(epoll_fd)");
+	for (size_t i = 0; i < streams.size(); ++i) {	
+		delete streams[i];
 	}
+
+	safe_close(epoll_fd);
 }
 
 vector<ClientStats> Server::get_client_stats() const
@@ -209,16 +68,18 @@ vector<ClientStats> Server::get_client_stats() const
 
 void Server::do_work()
 {
-	for ( ;; ) {
-		int nfds = epoll_wait(epoll_fd, events, EPOLL_MAX_EVENTS, EPOLL_TIMEOUT_MS);
-		if (nfds == -1 && errno == EINTR) {
-			if (should_stop) {
-				return;
-			}
-			continue;
-		}
-		if (nfds == -1) {
-			perror("epoll_wait");
+	while (!should_stop()) {
+		// Wait until there's activity on at least one of the fds,
+		// or 20 ms (about one frame at 50 fps) has elapsed.
+		//
+		// We could in theory wait forever and rely on wakeup()
+		// from add_client_deferred() and add_data_deferred(),
+		// but wakeup is a pretty expensive operation, and the
+		// two threads might end up fighting over a lock, so it's
+		// seemingly (much) more efficient to just have a timeout here.
+		int nfds = epoll_pwait(epoll_fd, events, EPOLL_MAX_EVENTS, EPOLL_TIMEOUT_MS, &sigset_without_usr1_block);
+		if (nfds == -1 && errno != EINTR) {
+			log_perror("epoll_wait");
 			exit(1);
 		}
 
@@ -227,9 +88,7 @@ void Server::do_work()
 		process_queued_data();
 
 		for (int i = 0; i < nfds; ++i) {
-			int fd = events[i].data.fd;
-			assert(clients.count(fd) != 0);
-			Client *client = &clients[fd];
+			Client *client = reinterpret_cast<Client *>(events[i].data.u64);
 
 			if (events[i].events & (EPOLLERR | EPOLLRDHUP | EPOLLHUP)) {
 				close_client(client);
@@ -239,19 +98,13 @@ void Server::do_work()
 			process_client(client);
 		}
 
-		for (map<string, Stream *>::iterator stream_it = streams.begin();
-		     stream_it != streams.end();
-		     ++stream_it) {
+		for (size_t i = 0; i < streams.size(); ++i) {	
 			vector<Client *> to_process;
-			swap(stream_it->second->to_process, to_process);
+			swap(streams[i]->to_process, to_process);
 			for (size_t i = 0; i < to_process.size(); ++i) {
 				process_client(to_process[i]);
 			}
 		}
-
-		if (should_stop) {
-			return;
-		}
 	}
 }
 
@@ -260,16 +113,27 @@ CubemapStateProto Server::serialize()
 	// We don't serialize anything queued, so empty the queues.
 	process_queued_data();
 
+	// Set all clients in a consistent state before serializing
+	// (ie., they have no remaining lost data). Otherwise, increasing
+	// the backlog could take clients into a newly valid area of the backlog,
+	// sending a stream of zeros instead of skipping the data as it should.
+	//
+	// TODO: Do this when clients are added back from serialized state instead;
+	// it would probably be less wasteful.
+	for (map<int, Client>::iterator client_it = clients.begin();
+	     client_it != clients.end();
+	     ++client_it) {
+		skip_lost_data(&client_it->second);
+	}
+
 	CubemapStateProto serialized;
 	for (map<int, Client>::const_iterator client_it = clients.begin();
 	     client_it != clients.end();
 	     ++client_it) {
 		serialized.add_clients()->MergeFrom(client_it->second.serialize());
 	}
-	for (map<string, Stream *>::const_iterator stream_it = streams.begin();
-	     stream_it != streams.end();
-	     ++stream_it) {
-		serialized.add_streams()->MergeFrom(stream_it->second->serialize());
+	for (size_t i = 0; i < streams.size(); ++i) {	
+		serialized.add_streams()->MergeFrom(streams[i]->serialize());
 	}
 	return serialized;
 }
@@ -282,27 +146,38 @@ void Server::add_client_deferred(int sock)
 
 void Server::add_client(int sock)
 {
-	clients.insert(make_pair(sock, Client(sock)));
+	pair<map<int, Client>::iterator, bool> ret =
+		clients.insert(make_pair(sock, Client(sock)));
+	assert(ret.second == true);  // Should not already exist.
+	Client *client_ptr = &ret.first->second;
 
 	// Start listening on data from this socket.
 	epoll_event ev;
 	ev.events = EPOLLIN | EPOLLET | EPOLLRDHUP;
-	ev.data.u64 = 0;  // Keep Valgrind happy.
-	ev.data.fd = sock;
+	ev.data.u64 = reinterpret_cast<uint64_t>(client_ptr);
 	if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, sock, &ev) == -1) {
-		perror("epoll_ctl(EPOLL_CTL_ADD)");
+		log_perror("epoll_ctl(EPOLL_CTL_ADD)");
 		exit(1);
 	}
 
-	process_client(&clients[sock]);
+	process_client(client_ptr);
 }
 
 void Server::add_client_from_serialized(const ClientProto &client)
 {
 	MutexLock lock(&mutex);
-	Stream *stream = find_stream(client.stream_id());
-	clients.insert(make_pair(client.sock(), Client(client, stream)));
-	Client *client_ptr = &clients[client.sock()];
+	Stream *stream;
+	int stream_index = lookup_stream_by_url(client.url());
+	if (stream_index == -1) {
+		assert(client.state() != Client::SENDING_DATA);
+		stream = NULL;
+	} else {
+		stream = streams[stream_index];
+	}
+	pair<map<int, Client>::iterator, bool> ret =
+		clients.insert(make_pair(client.sock(), Client(client, stream)));
+	assert(ret.second == true);  // Should not already exist.
+	Client *client_ptr = &ret.first->second;
 
 	// Start listening on data from this socket.
 	epoll_event ev;
@@ -313,37 +188,65 @@ void Server::add_client_from_serialized(const ClientProto &client)
 		// the sleeping array again soon.
 		ev.events = EPOLLOUT | EPOLLET | EPOLLRDHUP;
 	}
-	ev.data.u64 = 0;  // Keep Valgrind happy.
-	ev.data.fd = client.sock();
+	ev.data.u64 = reinterpret_cast<uint64_t>(client_ptr);
 	if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, client.sock(), &ev) == -1) {
-		perror("epoll_ctl(EPOLL_CTL_ADD)");
+		log_perror("epoll_ctl(EPOLL_CTL_ADD)");
 		exit(1);
 	}
 
 	if (client_ptr->state == Client::SENDING_DATA && 
-	    client_ptr->bytes_sent == client_ptr->stream->data_size) {
+	    client_ptr->stream_pos == client_ptr->stream->bytes_received) {
 		client_ptr->stream->put_client_to_sleep(client_ptr);
 	} else {
 		process_client(client_ptr);
 	}
 }
 
-void Server::add_stream(const string &stream_id)
+int Server::lookup_stream_by_url(const std::string &url) const
+{
+	map<string, int>::const_iterator url_it = url_map.find(url);
+	if (url_it == url_map.end()) {
+		return -1;
+	}
+	return url_it->second;
+}
+
+int Server::add_stream(const string &url, size_t backlog_size, Stream::Encoding encoding)
 {
 	MutexLock lock(&mutex);
-	streams.insert(make_pair(stream_id, new Stream(stream_id)));
+	url_map.insert(make_pair(url, streams.size()));
+	streams.push_back(new Stream(url, backlog_size, encoding));
+	return streams.size() - 1;
 }
 
-void Server::add_stream_from_serialized(const StreamProto &stream)
+int Server::add_stream_from_serialized(const StreamProto &stream, int data_fd)
+{
+	MutexLock lock(&mutex);
+	url_map.insert(make_pair(stream.url(), streams.size()));
+	streams.push_back(new Stream(stream, data_fd));
+	return streams.size() - 1;
+}
+	
+void Server::set_backlog_size(int stream_index, size_t new_size)
 {
 	MutexLock lock(&mutex);
-	streams.insert(make_pair(stream.stream_id(), new Stream(stream)));
+	assert(stream_index >= 0 && stream_index < ssize_t(streams.size()));
+	streams[stream_index]->set_backlog_size(new_size);
 }
 	
-void Server::set_header(const string &stream_id, const string &header)
+void Server::set_encoding(int stream_index, Stream::Encoding encoding)
 {
 	MutexLock lock(&mutex);
-	find_stream(stream_id)->header = header;
+	assert(stream_index >= 0 && stream_index < ssize_t(streams.size()));
+	streams[stream_index]->encoding = encoding;
+}
+	
+void Server::set_header(int stream_index, const string &http_header, const string &stream_header)
+{
+	MutexLock lock(&mutex);
+	assert(stream_index >= 0 && stream_index < ssize_t(streams.size()));
+	streams[stream_index]->http_header = http_header;
+	streams[stream_index]->stream_header = stream_header;
 
 	// If there are clients we haven't sent anything to yet, we should give
 	// them the header, so push back into the SENDING_HEADER state.
@@ -352,67 +255,25 @@ void Server::set_header(const string &stream_id, const string &header)
 	     ++client_it) {
 		Client *client = &client_it->second;
 		if (client->state == Client::SENDING_DATA &&
-		    client->bytes_sent == 0) {
+		    client->stream_pos == 0) {
 			construct_header(client);
 		}
 	}
 }
 	
-void Server::set_mark_pool(const std::string &stream_id, MarkPool *mark_pool)
+void Server::set_mark_pool(int stream_index, MarkPool *mark_pool)
 {
 	MutexLock lock(&mutex);
 	assert(clients.empty());
-	find_stream(stream_id)->mark_pool = mark_pool;
+	assert(stream_index >= 0 && stream_index < ssize_t(streams.size()));
+	streams[stream_index]->mark_pool = mark_pool;
 }
 
-void Server::add_data_deferred(const string &stream_id, const char *data, size_t bytes)
+void Server::add_data_deferred(int stream_index, const char *data, size_t bytes)
 {
 	MutexLock lock(&queued_data_mutex);
-	queued_data[stream_id].append(string(data, data + bytes));
-}
-
-void Server::add_data(const string &stream_id, const char *data, ssize_t bytes)
-{
-	Stream *stream = find_stream(stream_id);
-	size_t pos = stream->data_size % BACKLOG_SIZE;
-	stream->data_size += bytes;
-
-	if (pos + bytes > BACKLOG_SIZE) {
-		ssize_t to_copy = BACKLOG_SIZE - pos;
-		while (to_copy > 0) {
-			int ret = pwrite(stream->data_fd, data, to_copy, pos);
-			if (ret == -1 && errno == EINTR) {
-				continue;
-			}
-			if (ret == -1) {
-				perror("pwrite");
-				// Dazed and confused, but trying to continue...
-				break;
-			}
-			pos += ret;
-			data += ret;
-			to_copy -= ret;
-			bytes -= ret;
-		}
-		pos = 0;
-	}
-
-	while (bytes > 0) {
-		int ret = pwrite(stream->data_fd, data, bytes, pos);
-		if (ret == -1 && errno == EINTR) {
-			continue;
-		}
-		if (ret == -1) {
-			perror("pwrite");
-			// Dazed and confused, but trying to continue...
-			break;
-		}
-		pos += ret;
-		data += ret;
-		bytes -= ret;
-	}
-
-	stream->wake_up_all_clients();
+	assert(stream_index >= 0 && stream_index < ssize_t(streams.size()));
+	streams[stream_index]->add_data_deferred(data, bytes);
 }
 
 // See the .h file for postconditions after this function.	
@@ -434,7 +295,7 @@ read_request_again:
 			return;
 		}
 		if (ret == -1) {
-			perror("read");
+			log_perror("read");
 			close_client(client);
 			return;
 		}
@@ -448,7 +309,7 @@ read_request_again:
 	
 		switch (status) {
 		case RP_OUT_OF_SPACE:
-			fprintf(stderr, "WARNING: fd %d sent overlong request!\n", client->sock);
+			log(WARNING, "[%s] Client sent overlong request!", client->remote_addr.c_str());
 			close_client(client);
 			return;
 		case RP_NOT_FINISHED_YET:
@@ -456,7 +317,7 @@ read_request_again:
 			// See if there's more data for us.
 			goto read_request_again;
 		case RP_EXTRA_DATA:
-			fprintf(stderr, "WARNING: fd %d had junk data after request!\n", client->sock);
+			log(WARNING, "[%s] Junk data after request!", client->remote_addr.c_str());
 			close_client(client);
 			return;
 		case RP_FINISHED:
@@ -496,7 +357,7 @@ sending_header_or_error_again:
 
 		if (ret == -1) {
 			// Error! Postcondition #1.
-			perror("write");
+			log_perror("write");
 			close_client(client);
 			return;
 		}
@@ -523,37 +384,31 @@ sending_header_or_error_again:
 		// but we'll start sending immediately as we get data.
 		// This is postcondition #3.
 		client->state = Client::SENDING_DATA;
-		client->bytes_sent = client->stream->data_size;
+		client->stream_pos = client->stream->bytes_received;
 		client->stream->put_client_to_sleep(client);
 		return;
 	}
 	case Client::SENDING_DATA: {
-sending_data_again:
-		// See if there's some data we've lost. Ideally, we should drop to a block boundary,
-		// but resync will be the mux's problem.
+		skip_lost_data(client);
 		Stream *stream = client->stream;
-		size_t bytes_to_send = stream->data_size - client->bytes_sent;
+
+sending_data_again:
+		size_t bytes_to_send = stream->bytes_received - client->stream_pos;
+		assert(bytes_to_send <= stream->backlog_size);
 		if (bytes_to_send == 0) {
 			return;
 		}
-		if (bytes_to_send > BACKLOG_SIZE) {
-			fprintf(stderr, "WARNING: fd %d lost %lld bytes, maybe too slow connection\n",
-			        client->sock,
-			        (long long int)(bytes_to_send - BACKLOG_SIZE));
-			client->bytes_sent = stream->data_size - BACKLOG_SIZE;
-			bytes_to_send = BACKLOG_SIZE;
-		}
 
 		// See if we need to split across the circular buffer.
 		bool more_data = false;
-		if ((client->bytes_sent % BACKLOG_SIZE) + bytes_to_send > BACKLOG_SIZE) {
-			bytes_to_send = BACKLOG_SIZE - (client->bytes_sent % BACKLOG_SIZE);
+		if ((client->stream_pos % stream->backlog_size) + bytes_to_send > stream->backlog_size) {
+			bytes_to_send = stream->backlog_size - (client->stream_pos % stream->backlog_size);
 			more_data = true;
 		}
 
 		ssize_t ret;
 		do {
-			loff_t offset = client->bytes_sent % BACKLOG_SIZE;
+			loff_t offset = client->stream_pos % stream->backlog_size;
 			ret = sendfile(client->sock, stream->data_fd, &offset, bytes_to_send);
 		} while (ret == -1 && errno == EINTR);
 
@@ -565,17 +420,18 @@ sending_data_again:
 		}
 		if (ret == -1) {
 			// Error, close; postcondition #1.
-			perror("sendfile");
+			log_perror("sendfile");
 			close_client(client);
 			return;
 		}
+		client->stream_pos += ret;
 		client->bytes_sent += ret;
 
-		if (client->bytes_sent == stream->data_size) {
+		if (client->stream_pos == stream->bytes_received) {
 			// We don't have any more data for this client, so put it to sleep.
 			// This is postcondition #3.
 			stream->put_client_to_sleep(client);
-		} else if (more_data) {
+		} else if (more_data && size_t(ret) == bytes_to_send) {
 			goto sending_data_again;
 		}
 		break;
@@ -585,6 +441,26 @@ sending_data_again:
 	}
 }
 
+// See if there's some data we've lost. Ideally, we should drop to a block boundary,
+// but resync will be the mux's problem.
+void Server::skip_lost_data(Client *client)
+{
+	Stream *stream = client->stream;
+	size_t bytes_to_send = stream->bytes_received - client->stream_pos;
+	if (bytes_to_send > stream->backlog_size) {
+		size_t bytes_lost = bytes_to_send - stream->backlog_size;
+		client->stream_pos = stream->bytes_received - stream->backlog_size;
+		client->bytes_lost += bytes_lost;
+		++client->num_loss_events;
+
+		double loss_fraction = double(client->bytes_lost) / double(client->bytes_lost + client->bytes_sent);
+		log(WARNING, "[%s] Client lost %lld bytes (total loss: %.2f%%), maybe too slow connection",
+			client->remote_addr.c_str(),
+			(long long int)(bytes_lost),
+			100.0 * loss_fraction);
+	}
+}
+
 int Server::parse_request(Client *client)
 {
 	vector<string> lines = split_lines(client->request);
@@ -599,12 +475,14 @@ int Server::parse_request(Client *client)
 	if (request_tokens[0] != "GET") {
 		return 400;  // Should maybe be 405 instead?
 	}
-	if (streams.count(request_tokens[1]) == 0) {
+
+	map<string, int>::const_iterator url_map_it = url_map.find(request_tokens[1]);
+	if (url_map_it == url_map.end()) {
 		return 404;  // Not found.
 	}
 
-	client->stream_id = request_tokens[1];
-	client->stream = find_stream(client->stream_id);
+	client->url = request_tokens[1];
+	client->stream = streams[url_map_it->second];
 	if (client->stream->mark_pool != NULL) {
 		client->fwmark = client->stream->mark_pool->get_mark();
 	} else {
@@ -612,7 +490,7 @@ int Server::parse_request(Client *client)
 	}
 	if (setsockopt(client->sock, SOL_SOCKET, SO_MARK, &client->fwmark, sizeof(client->fwmark)) == -1) {                          
 		if (client->fwmark != 0) {
-			perror("setsockopt(SO_MARK)");
+			log_perror("setsockopt(SO_MARK)");
 		}
 	}
 	client->request.clear();
@@ -622,18 +500,37 @@ int Server::parse_request(Client *client)
 
 void Server::construct_header(Client *client)
 {
-	client->header_or_error = find_stream(client->stream_id)->header;
+	Stream *stream = client->stream;
+	if (stream->encoding == Stream::STREAM_ENCODING_RAW) {
+		client->header_or_error = stream->http_header +
+			"\r\n" +
+			stream->stream_header;
+	} else if (stream->encoding == Stream::STREAM_ENCODING_METACUBE) {
+		client->header_or_error = stream->http_header +
+			"Content-encoding: metacube\r\n" +
+			"\r\n";
+		if (!stream->stream_header.empty()) {
+			metacube_block_header hdr;
+			memcpy(hdr.sync, METACUBE_SYNC, sizeof(hdr.sync));
+			hdr.size = htonl(stream->stream_header.size());
+			hdr.flags = htonl(METACUBE_FLAGS_HEADER);
+			client->header_or_error.append(
+				string(reinterpret_cast<char *>(&hdr), sizeof(hdr)));
+		}
+		client->header_or_error.append(stream->stream_header);
+	} else {
+		assert(false);
+	}
 
 	// Switch states.
 	client->state = Client::SENDING_HEADER;
 
 	epoll_event ev;
 	ev.events = EPOLLOUT | EPOLLET | EPOLLRDHUP;
-	ev.data.u64 = 0;  // Keep Valgrind happy.
-	ev.data.fd = client->sock;
+	ev.data.u64 = reinterpret_cast<uint64_t>(client);
 
 	if (epoll_ctl(epoll_fd, EPOLL_CTL_MOD, client->sock, &ev) == -1) {
-		perror("epoll_ctl(EPOLL_CTL_MOD)");
+		log_perror("epoll_ctl(EPOLL_CTL_MOD)");
 		exit(1);
 	}
 }
@@ -650,11 +547,10 @@ void Server::construct_error(Client *client, int error_code)
 
 	epoll_event ev;
 	ev.events = EPOLLOUT | EPOLLET | EPOLLRDHUP;
-	ev.data.u64 = 0;  // Keep Valgrind happy.
-	ev.data.fd = client->sock;
+	ev.data.u64 = reinterpret_cast<uint64_t>(client);
 
 	if (epoll_ctl(epoll_fd, EPOLL_CTL_MOD, client->sock, &ev) == -1) {
-		perror("epoll_ctl(EPOLL_CTL_MOD)");
+		log_perror("epoll_ctl(EPOLL_CTL_MOD)");
 		exit(1);
 	}
 }
@@ -669,7 +565,7 @@ void delete_from(vector<T> *v, T elem)
 void Server::close_client(Client *client)
 {
 	if (epoll_ctl(epoll_fd, EPOLL_CTL_DEL, client->sock, NULL) == -1) {
-		perror("epoll_ctl(EPOLL_CTL_DEL)");
+		log_perror("epoll_ctl(EPOLL_CTL_DEL)");
 		exit(1);
 	}
 
@@ -683,26 +579,15 @@ void Server::close_client(Client *client)
 		}
 	}
 
-	// Bye-bye!
-	int ret;
-	do {
-		ret = close(client->sock);
-	} while (ret == -1 && errno == EINTR);
+	// Log to access_log.
+	access_log->write(client->get_stats());
 
-	if (ret == -1) {
-		perror("close");
-	}
+	// Bye-bye!
+	safe_close(client->sock);
 
 	clients.erase(client->sock);
 }
 	
-Stream *Server::find_stream(const string &stream_id)
-{
-	map<string, Stream *>::iterator it = streams.find(stream_id);
-	assert(it != streams.end());
-	return it->second;
-}
-
 void Server::process_queued_data()
 {
 	MutexLock lock(&queued_data_mutex);
@@ -711,11 +596,8 @@ void Server::process_queued_data()
 		add_client(queued_add_clients[i]);
 	}
 	queued_add_clients.clear();	
-	
-	for (map<string, string>::iterator queued_it = queued_data.begin();
-	     queued_it != queued_data.end();
-	     ++queued_it) {
-		add_data(queued_it->first, queued_it->second.data(), queued_it->second.size());
+
+	for (size_t i = 0; i < streams.size(); ++i) {	
+		streams[i]->process_queued_data();
 	}
-	queued_data.clear();
 }