#ifndef _HTTP_H
#define _HTTP_H

#include "Protocol.h"

/* Typical Firefox GET request headers:
GET / HTTP/1.1
Host: www.waterjustice.org
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-GB; rv:1.8.1.10) Gecko/20071115 Firefox/2.0.0.10
Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*\/*;q=0.5
Accept-Language: en-gb,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive 
*/
//request settings (HTTP11)
#define USERAGENT "Mozilla/5.0 (Windows; U; Windows NT 6.0; en-GB; rv:1.8.1.10) Gecko/2007111504 Firefox/2.0.0.10"
//#define USERAGENT "Mozilla/5.0 (Windows; U; Windows NT 6.0; en-GB; rv:1.8.1.6) Gecko/20070725 Firefox/2.0.0.6"
//#define ACCEPT "text/html;text/plain;"
#define ACCEPT "text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5"
#define ACCEPTLANGUAGE "en-gb,en;q=0.5"
#define ACCEPTENCODING ""
#define ACCEPTCHARSET "ISO-8859-1,utf-8;q=0.7,*;q=0.7"
#define KEEPALIVE "300"
#define CONNECTION "keep-alive"
#define FORMCONTENTTYPE "application/x-www-form-urlencoded; charset=utf-8;"

class HTTP: public Protocol {
protected:
	//Response headers : additional HTTP stateful properties (not static as depend on the input stream)
	enum responseProtocol {
		unknownResponseProtocol = 0,
		http1_0,
		http1_1
	} m_responseProtocol;

	//base HTTP transport header values
	int m_httpResponseCode;
	unsigned int m_contentLength;
	char *m_headerEnd, *m_bodyStart;
	const char *m_lastModifiedStr;
	const char *m_location;                //Location field. Used in 302 Object Moved
	bool m_connectionClose;

	//text - enum combinations
	const char *m_charSetText;             //-> m_charSet         Character set (will be transformed to UTF-8)
	const char *m_contentTypeText;         //-> m_contentType     Content-Type  (used to decide which IR subclass to create)
	const char *m_contentLanguageText;     //-> m_contentLanguage en-GB

	//Persistent header information that can be sync'd between 2 Protocol instances
	const char *m_PHPsessionID;
	const char *m_ASPsessionID;

	//finalise comms and create IneternetResource, etc.
	//standard call from virtual finalise()
	conversationResult charsetDecode();          //always decodes the set to UTF-8
	conversationResult contentDecode();          //for chunked transfer encoding (HTTP/1.1)
	conversationResult createInternetResource(); // **InternetResource (usually HTMLPage)
	conversationResult updatePersistentData();   //session data etc. cross-Protocol

	//additional functions for lookups text -> enum
	compression      textCompressionToEnum(const char *compression) const;
	contentEncoding  textContentEncodingToEnum(const char *contentEncoding) const;
	charSet          textCharsetToEnum(const char *charSet) const;
	ContentType     *textContentTypeToEnum(const char *contentTypeText) const;
	responseProtocol textResponseProtocolToEnum(const char *protocolText) const;
	contentLanguage  textContentLanguageToEnum(const char *language) const;

	//this class is abstract and can only be created by derived classes in the constructor
	HTTP(TIPsDatabase *_db, DomainConnection *_dc, InternetURIRequest *_ir, InternetResource **_resource, char *_buffer, const size_t _buffersize, PersistentData *_permData, const bool _manageBuffer = false);
	friend class Protocol;

	virtual const char *generateRequest() const;
	const bool checkForEOS();
	virtual conversationResult finalise();

public:
	//accessors (note that the private members point to a malloc'd area that will be freed: caller must strdupCheck())
	const char *location()       const {return m_location;}           //needs to be strdupCheck()
	const int httpResponseCode() const {return m_httpResponseCode;}   //primitive, no dup required
	const bool connectionClose() const {return m_connectionClose;}    //primitive, no dup required
	virtual const char *description() const {return "HTTP Protocol";} //const, no dup required

	//DomainConnectionEventSink events passed through to DC
	void connectionClosedOnRead(const size_t bufsize);
	void finishedRead(const int bytes);
};

#endif