From 24d998447070dbfef3eaf7762dce7e97c3903801 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Sun, 16 Nov 2008 02:49:22 +0000
Subject: TCP notification stream support (not fully implemented yet, but
 transport stuff is working). Support multiple event sources in the engine.
 Clean up HTTP/TCP stuff.

git-svn-id: http://svn.drobilla.net/lad/trunk/ingen@1721 a436a847-0d15-0410-975c-d299462d15a1
---
 src/shared/HTTPSender.cpp | 111 +++++++++++++++++++++++++++++++++++++++-------
 src/shared/HTTPSender.hpp |  21 ++++++---
 2 files changed, 110 insertions(+), 22 deletions(-)

(limited to 'src/shared')

diff --git a/src/shared/HTTPSender.cpp b/src/shared/HTTPSender.cpp
index 20135b2a..7f760786 100644
--- a/src/shared/HTTPSender.cpp
+++ b/src/shared/HTTPSender.cpp
@@ -20,6 +20,12 @@
 #include <iostream>
 #include <unistd.h>
 #include <stdarg.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <errno.h>
+
+#include <cstring>
 
 using namespace std;
 
@@ -27,53 +33,126 @@ namespace Ingen {
 namespace Shared {
 
 
-HTTPSender::HTTPSender(SoupServer* server, SoupMessage* msg)
-	: _server(server)
-	, _msg(msg)
+HTTPSender::HTTPSender()
+	: _listen_port(-1)
+	, _listen_sock(-1)
+	, _client_sock(-1)
+	, _send_state(Immediate)
 {
-	soup_message_headers_set_encoding(msg->response_headers, SOUP_ENCODING_CHUNKED);
-	cout << "Hello?" << endl;
-	send_chunk("hello");
+	Thread::set_name("HTTP Sender");
+
+	struct sockaddr_in addr;
+
+	// Create listen address
+	memset(&addr, 0, sizeof(addr));
+	addr.sin_family      = AF_INET;
+	addr.sin_addr.s_addr = htonl(INADDR_ANY);
+
+	// Create listen socket
+	if ((_listen_sock = socket(AF_INET, SOCK_STREAM, 0)) < 0 ) {
+		fprintf(stderr, "Error creating listening socket (%s)\n", strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+
+	// Bind our socket addresss to the listening socket
+	if (bind(_listen_sock, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
+		fprintf(stderr, "Error calling bind (%s)\n", strerror(errno));
+		_listen_sock = -1;
+	}
+	
+	// Find port number
+	socklen_t length = sizeof(addr);
+	if (getsockname(_listen_sock, (struct sockaddr*)&addr, &length) == -1) {
+		fprintf(stderr, "Error calling getsockname (%s)\n", strerror(errno));
+		_listen_sock = -1;
+		return;
+	}
+   
+	if (listen(_listen_sock, 1) < 0 ) {
+		cerr << "Error calling listen: %s" << strerror(errno) << endl;
+		_listen_sock = -1;
+		return;
+	}
+
+	_listen_port = ntohs(addr.sin_port);
+	cout << "Opening event stream on TCP port " << _listen_port << endl;
+	start();
 }
 
 
 HTTPSender::~HTTPSender()
 {
-	cout << "HTTP SENDER EXIT" << endl;
-	soup_message_body_complete(_msg->response_body);
-	soup_server_unpause_message(_server, _msg);
+	stop();
+	if (_listen_sock != -1)
+		close(_listen_sock);
+	if (_client_sock != -1)
+		close(_client_sock);
+}
+
+void
+HTTPSender::_run()
+{
+	if (_listen_sock == -1) {
+		cerr << "Unable to open socket, exiting sender thread" << endl;
+		return;
+	}
+	
+	// Accept connection
+	if ((_client_sock = accept(_listen_sock, NULL, NULL) ) < 0) {
+		cerr << "Error calling accept: " << strerror(errno) << endl;
+		return;
+	}
+
+	// Hold connection open and write when signalled
+	while (true) {
+		_mutex.lock();
+		_signal.wait(_mutex);
+
+		write(_client_sock, _transfer.c_str(), _transfer.length());
+		write(_client_sock, "\n\n", 2);
+
+		_mutex.unlock();
+	}
+
+	close(_listen_sock);
+	_listen_sock = -1;
 }
 
 
 void
 HTTPSender::bundle_begin()
 {
+	_mutex.lock();
 	_send_state = SendingBundle;
+	_transfer = "";
+	_mutex.unlock();
 }
 
 
 void
 HTTPSender::bundle_end()
 {
+	_mutex.lock();
 	assert(_send_state == SendingBundle);
-	soup_message_body_append(_msg->response_body,
-			SOUP_MEMORY_TEMPORARY, _transfer.c_str(), _transfer.length());
-	soup_server_unpause_message(_server, _msg);
-	_transfer = "";
+	_signal.broadcast();
 	_send_state = Immediate;
+	_mutex.unlock();
 }
 
 	
 void
 HTTPSender::send_chunk(const std::string& buf)
 {
+	_mutex.lock();
+	
 	if (_send_state == Immediate) {
-		soup_message_body_append(_msg->response_body,
-				SOUP_MEMORY_TEMPORARY, buf.c_str(), buf.length());
-		soup_server_unpause_message(_server, _msg);
+		_transfer = "";
+		_signal.broadcast();
 	} else {
 		_transfer.append(buf);
 	}
+	
+	_mutex.unlock();
 }
 
 
diff --git a/src/shared/HTTPSender.hpp b/src/shared/HTTPSender.hpp
index 1025c071..1077b76d 100644
--- a/src/shared/HTTPSender.hpp
+++ b/src/shared/HTTPSender.hpp
@@ -20,14 +20,15 @@
 
 #include <stdint.h>
 #include <string>
-#include <libsoup/soup.h>
+#include <glibmm/thread.h>
+#include "raul/Thread.hpp"
 
 namespace Ingen {
 namespace Shared {
 
-class HTTPSender {
+class HTTPSender : public Raul::Thread {
 public:
-	HTTPSender(SoupServer* server, SoupMessage* msg);
+	HTTPSender();
 	virtual ~HTTPSender();
 
 	// Message bundling
@@ -38,13 +39,21 @@ public:
 	void transfer_begin() { bundle_begin(); }
 	void transfer_end()   { bundle_end(); }
 
+	int listen_port() const { return _listen_port; }
+
 protected:
-	void send_chunk(const std::string& buf);
+	void _run();
 
+	void send_chunk(const std::string& buf);
+	
 	enum SendState { Immediate, SendingBundle };
 
-	SoupServer*  _server;
-	SoupMessage* _msg;
+	Glib::Mutex _mutex;
+	Glib::Cond  _signal;
+
+	int          _listen_port;
+	int          _listen_sock;
+	int          _client_sock;
 	SendState    _send_state;
 	std::string  _transfer;
 };
-- 
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