From 2db44fc18ea963b3d10bceea1abfe89e98a83de2 Mon Sep 17 00:00:00 2001
From: rubidium <rubidium@openttd.org>
Date: Wed, 3 Feb 2010 18:42:23 +0000
Subject: (svn r18994) -Change: content mirroring support (based on work by
 TrueBrain).

---
 src/network/core/tcp_http.h | 143 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100644 src/network/core/tcp_http.h

(limited to 'src/network/core/tcp_http.h')

diff --git a/src/network/core/tcp_http.h b/src/network/core/tcp_http.h
new file mode 100644
index 000000000..6939577ad
--- /dev/null
+++ b/src/network/core/tcp_http.h
@@ -0,0 +1,143 @@
+/* $Id$ */
+
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file tcp_http.h Basic functions to receive and send HTTP TCP packets.
+ */
+
+#ifndef NETWORK_CORE_TCP_HTTP_H
+#define NETWORK_CORE_TCP_HTTP_H
+
+#include "address.h"
+
+#ifdef ENABLE_NETWORK
+
+/** Callback for when the HTTP handler has something to tell us. */
+struct HTTPCallback {
+	/**
+	 * An error has occured and the connection has been closed.
+	 * @note HTTP socket handler is closed/freed.
+	 */
+	virtual void OnFailure() = 0;
+
+	/**
+	 * We're receiving data.
+	 * @param data   the received data, NULL when all data has been received.
+	 * @param length the amount of received data, 0 when all data has been received.
+	 * @note When NULL is sent the HTTP socket handler is closed/freed.
+	 */
+	virtual void OnReceiveData(const char *data, size_t length) = 0;
+};
+
+/** Base socket handler for HTTP traffic. */
+class NetworkHTTPSocketHandler : public NetworkSocketHandler {
+private:
+	char recv_buffer[4096];   ///< Partially received message.
+	int recv_pos;             ///< Current position in buffer.
+	int recv_length;          ///< Length of the data still retrieving.
+	HTTPCallback *callback;   ///< The callback to call for the incoming data.
+	const char *data;         ///< The (POST) data we might want to forward (to a redirect).
+	int redirect_depth;       ///< The depth of the redirection.
+
+	int HandleHeader();
+	int Receive();
+public:
+	SOCKET sock;              ///< The socket currently connected to
+
+	/**
+	 * Whether this socket is currently bound to a socket.
+	 * @return true when the socket is bound, false otherwise
+	 */
+	bool IsConnected() const
+	{
+		return this->sock != INVALID_SOCKET;
+	}
+
+	virtual NetworkRecvStatus CloseConnection(bool error = true);
+
+	/**
+	 * Start the querying
+	 * @param sock     the socket of this connection
+	 * @param callback the callback for HTTP retrieval
+	 * @param url      the url at the server
+	 * @param data     the data to send
+	 * @param depth    the depth (redirect recursion) of the queries
+	 */
+	NetworkHTTPSocketHandler(SOCKET sock, HTTPCallback *callback,
+			const char *host, const char *url, const char *data, int depth);
+
+	/** Free whatever needs to be freed. */
+	~NetworkHTTPSocketHandler();
+
+	/**
+	 * Connect to the given URI.
+	 * @param uri      the URI to connect to.
+	 * @param callback the callback to send data back on.
+	 * @param data     the data we want to send (as POST).
+	 * @param depth    the recursion/redirect depth.
+	 */
+	static int Connect(char *uri, HTTPCallback *callback,
+			const char *data = NULL, int depth = 0);
+
+	/**
+	 * Do the receiving for all HTTP connections.
+	 */
+	static void HTTPReceive();
+};
+
+/** Connect with a HTTP server and do ONE query. */
+class NetworkHTTPContentConnecter : TCPConnecter {
+	HTTPCallback *callback; ///< Callback to tell that we received some data (or won't).
+	const char *url;        ///< The URL we want to get at the server.
+	const char *data;       ///< The data to send
+	int depth;              ///< How far we have recursed
+
+public:
+	/**
+	 * Start the connecting.
+	 * @param address  the address to connect to
+	 * @param callback the callback for HTTP retrieval
+	 * @param url      the url at the server
+	 * @param data     the data to send
+	 * @param depth    the depth (redirect recursion) of the queries
+	 */
+	NetworkHTTPContentConnecter(const NetworkAddress &address,
+			HTTPCallback *callback, const char *url,
+			const char *data = NULL, int depth = 0) :
+		TCPConnecter(address),
+		callback(callback),
+		url(strdup(url)),
+		data(data),
+		depth(depth)
+	{
+	}
+
+	/** Free all our allocated data. */
+	~NetworkHTTPContentConnecter()
+	{
+		free((void*)this->url);
+	}
+
+	virtual void OnFailure()
+	{
+		this->callback->OnFailure();
+		free((void*)this->data);
+	}
+
+	virtual void OnConnect(SOCKET s)
+	{
+		new NetworkHTTPSocketHandler(s, this->callback, this->address.GetHostname(), this->url, this->data, this->depth);
+		/* We've relinguished control of data now. */
+		this->data = NULL;
+	}
+};
+
+#endif /* ENABLE_NETWORK */
+
+#endif /* NETWORK_CORE_HTTP_H */
-- 
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