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128 lines
4.6 KiB
C++
128 lines
4.6 KiB
C++
/// \file
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/// \brief Contains HTTPConnection, used to communicate with web servers
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///
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/// This file is part of RakNet Copyright 2008 Kevin Jenkins.
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///
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/// Usage of RakNet is subject to the appropriate license agreement.
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/// Creative Commons Licensees are subject to the
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/// license found at
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/// http://creativecommons.org/licenses/by-nc/2.5/
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/// Single application licensees are subject to the license found at
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/// http://www.jenkinssoftware.com/SingleApplicationLicense.html
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/// Custom license users are subject to the terms therein.
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/// GPL license users are subject to the GNU General Public
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/// License as published by the Free
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/// Software Foundation; either version 2 of the License, or (at your
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/// option) any later version.
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#ifndef __HTTP_CONNECTION
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#define __HTTP_CONNECTION
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#include "Export.h"
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#include "RakString.h"
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#include "RakMemoryOverride.h"
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#include "RakNetTypes.h"
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#include "DS_Queue.h"
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class TCPInterface;
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struct SystemAddress;
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/// \brief Use HTTPConnection to communicate with a web server.
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/// Start an instance of TCPInterface via the Start() command.
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/// Instantiate a new instance of HTTPConnection, and associate TCPInterface with the class in the constructor.
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/// Use Post() to send commands to the web server, and ProcessDataPacket() to update the connection with packets returned from TCPInterface that have the system address of the web server
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/// This class will handle connecting and reconnecting as necessary.
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///
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/// Note that only one Post() can be handled at a time.
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class RAK_DLL_EXPORT HTTPConnection : public RakNet::RakMemoryOverride
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{
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public:
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/// Returns a HTTP object associated with this tcp connection
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/// \pre tcp should already be started
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HTTPConnection(TCPInterface& tcp, const char *host, unsigned short port=80);
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virtual ~HTTPConnection();
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/// Submit data to the HTTP server
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/// HTTP only allows one request at a time per connection
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///
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/// \pre IsBusy()==false
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/// \param path the path on the remote server you want to POST to. For example "mywebpage/index.html"
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/// \param data A NULL terminated string to submit to the server
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/// \param contentType "Content-Type:" passed to post.
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void Post(const char *path, const char *data, const char *_contentType="application/x-www-form-urlencoded");
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/// Get data returned by the HTTP server
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/// If IsFinished()==false then this may be empty or a partial
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/// response.
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RakNet::RakString Read(void);
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/// Call periodically to do time-based updates
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void Update(void);
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/// Returns the address of the server we are connected to
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SystemAddress GetServerAddress(void) const;
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/// Process an HTTP data packet returned from TCPInterface
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/// Returns true when we have gotten all the data from the HTTP server.
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/// If this returns true then it's safe to Post() another request
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/// Deallocate the packet as usual via TCPInterface
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/// \param packet NULL or a packet associated with our host and port
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/// \return true when all data from one Post() has been read.
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bool ProcessFinalTCPPacket(Packet *packet);
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/// Results of HTTP requests. Standard response codes are < 999
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/// ( define HTTP codes and our internal codes as needed )
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enum ResponseCodes { NoBody=1001, OK=200, Deleted=1002 };
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HTTPConnection& operator=(const HTTPConnection& rhs){(void) rhs; return *this;}
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/// Encapsulates a raw HTTP response and response code
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struct BadResponse
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{
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public:
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BadResponse() {code=0;}
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BadResponse(const unsigned char *_data, int _code)
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: data((const char *)_data), code(_code) {}
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BadResponse(const char *_data, int _code)
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: data(_data), code(_code) {}
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operator int () const { return code; }
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RakNet::RakString data;
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int code; // ResponseCodes
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};
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/// Queued events of failed exchanges with the HTTP server
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bool HasBadResponse(int *code, RakNet::RakString *data);
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/// Returns false if the connection is not doing anything else
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bool IsBusy(void) const;
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/// \internal
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int GetState(void) const;
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private:
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SystemAddress server;
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TCPInterface& tcp;
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RakNet::RakString host;
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unsigned short port;
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enum { RAK_HTTP_INITIAL,
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RAK_HTTP_STARTING,
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RAK_HTTP_CONNECTING,
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RAK_HTTP_ESTABLISHED,
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RAK_HTTP_REQUEST_SENT,
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RAK_HTTP_IDLE } state;
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RakNet::RakString outgoing, incoming, path, contentType;
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DataStructures::Queue<BadResponse> badResponses;
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void Process(Packet *packet); // the workhorse
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// this helps check the various status lists in TCPInterface
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typedef SystemAddress (TCPInterface::*StatusCheckFunction)(void);
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bool InList(StatusCheckFunction func);
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};
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#endif
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