X-Git-Url: https://git.sesse.net/?p=cubemap;a=blobdiff_plain;f=input.cpp;h=f5d8d5ef19ff8dced7f5d75a73b5a724b2942a82;hp=58d319f10428d74435bd8d79fb35817785f63eb1;hb=7aec1a69c2726488fcc6c9d6fc25f2e413329738;hpb=e20ad47985bdda71b7b58c26932dad9a3a50c066

diff --git a/input.cpp b/input.cpp
index 58d319f..f5d8d5e 100644
--- a/input.cpp
+++ b/input.cpp
@@ -1,51 +1,74 @@
-#include <stdio.h>
-#include <string.h>
-#include <stdint.h>
-#include <assert.h>
-#include <arpa/inet.h>
-#include <sys/socket.h>
-#include <pthread.h>
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#include <poll.h>
-#include <errno.h>
-#include <vector>
+#include <stddef.h>
 #include <string>
-#include <map>
 
-#include "metacube.h"
-#include "mutexlock.h"
+#include "httpinput.h"
 #include "input.h"
-#include "server.h"
-#include "serverpool.h"
-#include "parse.h"
 #include "state.pb.h"
+#include "udpinput.h"
 
 using namespace std;
 
-extern ServerPool *servers;
-	  
+namespace {
+
+// Does not support passwords, only user:host, since this is really only used
+// to parse VLC's udp://source@multicastgroup:1234/ syntax (we do not support
+// even basic auth).
+void split_user_host(const string &user_host, string *user, string *host)
+{
+	size_t split = user_host.find("@");
+	if (split == string::npos) {
+		user->clear();
+		*host = user_host;
+	} else {
+		*user = string(user_host.begin(), user_host.begin() + split);
+		*host = string(user_host.begin() + split + 1, user_host.end());
+	}
+}
+
+}  // namespace
+
 // Extremely rudimentary URL parsing.
-bool parse_url(const string &url, string *host, string *port, string *path)
+bool parse_url(const string &url, string *protocol, string *user, string *host, string *port, string *path)
 {
-	if (url.find("http://") != 0) {
+	size_t split = url.find("://");
+	if (split == string::npos) {
 		return false;
 	}
-	
-	string rest = url.substr(strlen("http://"));
-	size_t split = rest.find_first_of(":/");
-	if (split == string::npos) {
+	*protocol = string(url.begin(), url.begin() + split);
+
+	string rest = string(url.begin() + split + 3, url.end());
+
+	// Split at the first slash, or the first colon that's not within [].
+	bool within_brackets = false;
+	for (split = 0; split < rest.size(); ++split) {
+		if (rest[split] == '[') {
+			if (within_brackets) {
+				// Can't nest brackets.
+				return false;
+			}
+			within_brackets = true;
+		} else if (rest[split] == ']') {
+			if (!within_brackets) {
+				// ] without matching [.
+				return false;
+			}
+			within_brackets = false;
+		} else if (rest[split] == '/') {
+			break;
+		} else if (rest[split] == ':' && !within_brackets) {
+			break;
+		}
+	}
+
+	if (split == rest.size()) {
 		// http://foo
-		*host = rest;
-		*port = "http";
+		split_user_host(rest, user, host);
+		*port = *protocol;
 		*path = "/";
 		return true;
 	}
 
-	*host = string(rest.begin(), rest.begin() + split);
+	split_user_host(string(rest.begin(), rest.begin() + split), user, host);
 	char ch = rest[split];  // Colon or slash.
 	rest = string(rest.begin() + split + 1, rest.end());
 
@@ -66,357 +89,40 @@ bool parse_url(const string &url, string *host, string *port, string *path)
 	}
 
 	// http://foo/bar
-	*port = "http";
-	*path = rest;
+	*port = *protocol;
+	*path = "/" + rest;
 	return true;
 }
 
-Input::Input(const string &stream_id, const string &url)
-	: state(NOT_CONNECTED),
-	  stream_id(stream_id),
-	  url(url),
-	  has_metacube_header(false),
-	  sock(-1)
-{
-}
-
-Input::Input(const InputProto &serialized)
-	: state(State(serialized.state())),
-	  stream_id(serialized.stream_id()),
-	  url(serialized.url()),
-	  request(serialized.request()),
-	  request_bytes_sent(serialized.request_bytes_sent()),
-	  response(serialized.response()),
-	  has_metacube_header(serialized.has_metacube_header()),
-	  sock(serialized.sock())
-{
-	pending_data.resize(serialized.pending_data().size());
-	memcpy(&pending_data[0], serialized.pending_data().data(), serialized.pending_data().size());
-
-	parse_url(url, &host, &port, &path);  // Don't care if it fails.
-}
-
-InputProto Input::serialize() const
+Input *create_input(const std::string &url)
 {
-	InputProto serialized;
-	serialized.set_state(state);
-	serialized.set_stream_id(stream_id);
-	serialized.set_url(url);
-	serialized.set_request(request);
-	serialized.set_request_bytes_sent(request_bytes_sent);
-	serialized.set_response(response);
-	serialized.set_pending_data(string(pending_data.begin(), pending_data.end()));
-	serialized.set_has_metacube_header(has_metacube_header);
-	serialized.set_sock(sock);
-	return serialized;
-}
-
-void Input::run()
-{
-	should_stop = false;
-	
-	// Joinable is already the default, but it's good to be certain.
-	pthread_attr_t attr;
-	pthread_attr_init(&attr);
-	pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
-	pthread_create(&worker_thread, &attr, Input::do_work_thunk, this);
-}
-
-void Input::stop()
-{
-	should_stop = true;
-
-	if (pthread_join(worker_thread, NULL) == -1) {
-		perror("pthread_join");
-		exit(1);
+	string protocol, user, host, port, path;
+	if (!parse_url(url, &protocol, &user, &host, &port, &path)) {
+		return NULL;
 	}
-}
-
-void *Input::do_work_thunk(void *arg)
-{
-	Input *input = static_cast<Input *>(arg);
-	input->do_work();
-	return NULL;
-}
-
-int Input::lookup_and_connect(const string &host, const string &port)
-{
-	addrinfo *ai;
-	int err = getaddrinfo(host.c_str(), port.c_str(), NULL, &ai);
-	if (err == -1) {
-		fprintf(stderr, "WARNING: Lookup of '%s' failed (%s).\n",
-			host.c_str(), gai_strerror(err));
-		freeaddrinfo(ai);
-		return -1;
+	if (protocol == "http") {
+		return new HTTPInput(url);
 	}
-
-	// Connect to everything in turn until we have a socket.
-	while (ai && !should_stop) {
-		int sock = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
-		if (sock == -1) {
-			// Could be e.g. EPROTONOSUPPORT. The show must go on.
-			continue;
-		}
-
-		do {
-			err = connect(sock, ai->ai_addr, ai->ai_addrlen);
-		} while (err == -1 && errno == EINTR);
-
-		if (err != -1) {
-			freeaddrinfo(ai);
-			return sock;
-		}
-
-		ai = ai->ai_next;
+	if (protocol == "udp") {
+		return new UDPInput(url);
 	}
-
-	// Give the last one as error.
-	fprintf(stderr, "WARNING: Connect to '%s' failed (%s)\n",
-	        host.c_str(), strerror(errno));
-	freeaddrinfo(ai);
-	return -1;
+	return NULL;
 }
 
-void Input::do_work()
+Input *create_input(const InputProto &serialized)
 {
-	while (!should_stop) {
-		if (state == SENDING_REQUEST || state == RECEIVING_HEADER || state == RECEIVING_DATA) {
-			// Since we are non-blocking, we need to wait for the right state first.
-			// Wait up to 50 ms, then check should_stop.
-			pollfd pfd;
-			pfd.fd = sock;
-			pfd.events = (state == SENDING_REQUEST) ? POLLOUT : POLLIN;
-			pfd.events |= POLLRDHUP;
-
-			int nfds = poll(&pfd, 1, 50);
-			if (nfds == 0 || (nfds == -1 && errno == EAGAIN)) {
-				continue;
-			}
-			if (nfds == -1) {
-				perror("poll");
-				state = CLOSING_SOCKET;
-			}
-		}
-
-		switch (state) {
-		case NOT_CONNECTED:
-			request.clear();
-			request_bytes_sent = 0;
-			response.clear();
-	
-			if (!parse_url(url, &host, &port, &path)) {
-				fprintf(stderr, "Failed to parse URL '%s'\n", url.c_str());
-				break;
-			}
-
-			sock = lookup_and_connect(host, port);
-			if (sock != -1) {
-				// Yay, successful connect. Try to set it as nonblocking.
-				int one = 1;
-				if (ioctl(sock, FIONBIO, &one) == -1) {
-					perror("ioctl(FIONBIO)");
-					state = CLOSING_SOCKET;
-				} else {
-					state = SENDING_REQUEST;
-					request = "GET " + path + " HTTP/1.0\r\nUser-Agent: cubemap\r\n\r\n";
-					request_bytes_sent = 0;
-				}
-			}
-			break;
-		case SENDING_REQUEST: {
-			size_t to_send = request.size() - request_bytes_sent;
-			int ret;
-
-			do {
-				ret = write(sock, request.data() + request_bytes_sent, to_send);
-			} while (ret == -1 && errno == EINTR);
-
-			if (ret == -1) {
-				perror("write");
-				state = CLOSING_SOCKET;
-				continue;
-			}
-
-			assert(ret >= 0);
-			request_bytes_sent += ret;
-
-			if (request_bytes_sent == request.size()) {
-				state = RECEIVING_HEADER;
-			}
-			break;
-		}
-		case RECEIVING_HEADER: {
-			char buf[4096];
-			int ret;
-
-			do {
-				ret = read(sock, buf, sizeof(buf));
-			} while (ret == -1 && errno == EINTR);
-
-			if (ret == -1) {
-				perror("read");
-				state = CLOSING_SOCKET;
-				continue;
-			}
-
-			if (ret == 0) {
-				// This really shouldn't happen...
-				fprintf(stderr, "Socket unexpectedly closed while reading header\n");
-				state = CLOSING_SOCKET;
-				continue;
-			}
-			
-			RequestParseStatus status = wait_for_double_newline(&response, buf, ret);
-			
-			if (status == RP_OUT_OF_SPACE) {
-				fprintf(stderr, "WARNING: fd %d sent overlong response!\n", sock);
-				state = CLOSING_SOCKET;
-				continue;
-			} else if (status == RP_NOT_FINISHED_YET) {
-				continue;
-			}
-	
-			// OK, so we're fine, but there might be some of the actual data after the response.
-			// We'll need to deal with that separately.
-			string extra_data;
-			if (status == RP_EXTRA_DATA) {
-				char *ptr = static_cast<char *>(
-					memmem(response.data(), response.size(), "\r\n\r\n", 4));
-				assert(ptr != NULL);
-				extra_data = string(ptr, &response[0] + response.size());
-				response.resize(ptr - response.data());
-			}
-
-			// TODO: Check that the response is 200, save the headers, etc.
-
-			if (!extra_data.empty()) {
-				process_data(&extra_data[0], extra_data.size());
-			}
-
-			state = RECEIVING_DATA;
-			break;
-		}
-		case RECEIVING_DATA: {
-			char buf[4096];
-			int ret;
-
-			do {
-				ret = read(sock, buf, sizeof(buf));
-			} while (ret == -1 && errno == EINTR);
-
-			if (ret == -1) {
-				perror("read");
-				state = CLOSING_SOCKET;
-				continue;
-			}
-
-			if (ret == 0) {
-				// This really shouldn't happen...
-				fprintf(stderr, "Socket unexpectedly closed while reading header\n");
-				state = CLOSING_SOCKET;
-				continue;
-			}
-
-			process_data(buf, ret);
-			break;
-		}
-		case CLOSING_SOCKET: {
-			int err;
-			do {
-				err = close(sock);
-			} while (err == -1 && errno == EINTR);
-
-			if (err == -1) {
-				perror("close");
-			}
-
-			state = NOT_CONNECTED;
-			break;
-		}
-		default:
-			assert(false);
-		}
-
-		// If we are still in NOT_CONNECTED, either something went wrong,
-		// or the connection just got closed.
-		// The earlier steps have already given the error message, if any.
-		if (state == NOT_CONNECTED && !should_stop) {
-			fprintf(stderr, "Waiting 0.2 second and restarting...\n");
-			usleep(200000);
-		}
+	string protocol, user, host, port, path;
+	if (!parse_url(serialized.url(), &protocol, &user, &host, &port, &path)) {
+		return NULL;
 	}
-}
-
-void Input::process_data(char *ptr, size_t bytes)
-{
-	pending_data.insert(pending_data.end(), ptr, ptr + bytes);
-
-	for ( ;; ) {
-		// If we don't have enough data (yet) for even the Metacube header, just return.
-		if (pending_data.size() < sizeof(metacube_block_header)) {
-			return;
-		}
-
-		// Make sure we have the Metacube sync header at the start.
-		// We may need to skip over junk data (it _should_ not happen, though).
-		if (!has_metacube_header) {
-			char *ptr = static_cast<char *>(
-				memmem(pending_data.data(), pending_data.size(),
-				       METACUBE_SYNC, strlen(METACUBE_SYNC)));
-			if (ptr == NULL) {
-				// OK, so we didn't find the sync marker. We know then that
-				// we do not have the _full_ marker in the buffer, but we
-				// could have N-1 bytes. Drop everything before that,
-				// and then give up.
-				drop_pending_data(pending_data.size() - (strlen(METACUBE_SYNC) - 1));
-				return;
-			} else {
-				// Yay, we found the header. Drop everything (if anything) before it.
-				drop_pending_data(ptr - pending_data.data());
-				has_metacube_header = true;
-
-				// Re-check that we have the entire header; we could have dropped data.
-				if (pending_data.size() < sizeof(metacube_block_header)) {
-					return;
-				}
-			}
-		}
-
-		// Now it's safe to read the header.
-		metacube_block_header *hdr = reinterpret_cast<metacube_block_header *>(pending_data.data());	
-		assert(memcmp(hdr->sync, METACUBE_SYNC, sizeof(hdr->sync)) == 0);
-		uint32_t size = ntohl(hdr->size);
-		uint32_t flags = ntohl(hdr->flags);
-
-		// See if we have the entire block. If not, wait for more data.
-		if (pending_data.size() < sizeof(metacube_block_header) + size) {
-			return;
-		}
-
-		// Send this block on to the data.
-		char *inner_data = pending_data.data() + sizeof(metacube_block_header);
-		if (flags & METACUBE_FLAGS_HEADER) {
-			string header(inner_data, inner_data + size);
-			servers->set_header(stream_id, header);
-		} else { 
-			servers->add_data(stream_id, inner_data, size);
-		}
-
-		// Consume the block. This isn't the most efficient way of dealing with things
-		// should we have many blocks, but these routines don't need to be too efficient
-		// anyway.
-		pending_data.erase(pending_data.begin(), pending_data.begin() + sizeof(metacube_block_header) + size);
-		has_metacube_header = false;
+	if (protocol == "http") {
+		return new HTTPInput(serialized);
 	}
-}
-
-void Input::drop_pending_data(size_t num_bytes)
-{
-	if (num_bytes == 0) {
-		return;
+	if (protocol == "udp") {
+		return new UDPInput(serialized);
 	}
-	fprintf(stderr, "Warning: Dropping %lld junk bytes from stream, maybe it is not a Metacube stream?\n",
-		(long long)num_bytes);
-	pending_data.erase(pending_data.begin(), pending_data.begin() + num_bytes);
+	return NULL;
 }
 
+Input::~Input() {}
+