From 11e0c73ffd23a506c68ae351641a7ca74085ca81 Mon Sep 17 00:00:00 2001
From: madmaxoft <github@xoft.cz>
Date: Tue, 24 Sep 2013 20:52:37 +0200
Subject: Implemented basic HTTP message header parsing.

---
 source/WebServer.h | 122 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 source/WebServer.h

(limited to 'source/WebServer.h')

diff --git a/source/WebServer.h b/source/WebServer.h
new file mode 100644
index 000000000..1a10e4461
--- /dev/null
+++ b/source/WebServer.h
@@ -0,0 +1,122 @@
+
+// WebServer.h
+
+// Declares the cWebServer class representing a HTTP webserver that uses cListenThread and cSocketThreads for processing
+
+
+
+
+
+#pragma once
+
+#include "OSSupport/ListenThread.h"
+#include "OSSupport/SocketThreads.h"
+#include "../iniFile/iniFile.h"
+
+
+
+
+
+// fwd:
+class cWebServer;
+
+
+
+
+
+class cWebRequest :
+	public cSocketThreads::cCallback
+{
+public:
+	enum
+	{
+		HTTP_OK = 200,
+		HTTP_BAD_REQUEST = 400,
+	} ;
+	
+	cWebRequest(cWebServer & a_WebServer);
+	
+	/// Sends HTTP status code together with a_Reason
+	void SendStatusAndReason(int a_StatusCode, const AString & a_Reason);
+	
+protected:
+	typedef std::map<AString, AString> cNameValueMap;
+	
+	cWebServer & m_WebServer;
+	
+	AString       m_Method;   ///< Method of the request (GET / PUT / POST / ...)
+	AString       m_URL;      ///< Full URL of the request
+	cNameValueMap m_Headers;  ///< All the headers the request has come with
+	
+	AString m_IncomingHeaderData;  ///< All the incoming data until the entire header is parsed
+	
+	/// Set to true when the header haven't been received yet. If false, receiving the optional body.
+	bool m_IsReceivingHeaders;
+	
+	/// Data that is queued for sending, once the socket becomes writable
+	AString m_OutgoingData;
+	
+	
+	/// Parses the header in m_IncomingData until the specified end mark
+	void ParseHeader(size_t a_IdxEnd);
+	
+	/** Parses the RequestLine out of m_IncomingHeaderData, up to index a_IdxEnd
+	Returns the index to the next line, or npos if invalid request
+	*/
+	size_t ParseRequestLine(size_t a_IdxEnd);
+	
+	/** Parses one header field out of m_IncomingHeaderData, starting at the specified offset, up to offset a_IdxEnd.
+	Returns the index to the next line, or npos if invalid request.
+	a_Key is set to the key that was parsed (used for multi-line headers)
+	*/
+	size_t ParseHeaderField(size_t a_IdxStart, size_t a_IdxEnd, AString & a_Key);
+	
+	/** Parses one header field that is known to be a continuation of previous header.
+	Returns the index to the next line, or npos if invalid request.
+	*/
+	size_t ParseHeaderFieldContinuation(size_t a_IdxStart, size_t a_IdxEnd, AString & a_Key);
+	
+	/// Adds a header into m_Headers; appends if key already exists
+	void AddHeader(const AString & a_Key, const AString & a_Value);
+	
+	// cSocketThreads::cCallback overrides:
+	virtual void DataReceived   (const char * a_Data, int a_Size) override;  // Data is received from the client
+	virtual void GetOutgoingData(AString & a_Data) override;  // Data can be sent to client
+	virtual void SocketClosed   (void) override;  // The socket has been closed for any reason
+} ;
+
+typedef std::vector<cWebRequest *> cWebRequests;
+
+
+
+
+class cWebServer :
+	public cListenThread::cCallback
+{
+public:
+	cWebServer(void);
+	
+	bool Initialize(cIniFile & a_IniFile);
+	
+protected:
+	friend class cWebRequest;
+	
+	cListenThread m_ListenThreadIPv4;
+	cListenThread m_ListenThreadIPv6;
+	
+	cSocketThreads m_SocketThreads;
+
+	cCriticalSection m_CSRequests;
+	cWebRequests     m_Requests;    ///< All the requests that are currently being serviced
+
+	// cListenThread::cCallback overrides:
+	virtual void OnConnectionAccepted(cSocket & a_Socket) override;
+	
+	/// Called by cWebRequest when it finishes parsing its header
+	void RequestReady(cWebRequest * a_Request);
+} ;
+
+
+
+
+
-- 
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