httpparser.h

电驴下载工具eMule0.47aVeryCD的源代码,可作分析测试也可用于P2P软件的开发研究.

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#ifndef GENLIB_NET_HTTP_HTTPPARSER_H
#define GENLIB_NET_HTTP_HTTPPARSER_H

#include "util.h"
#include "membuffer.h"
#include "uri.h"

#include "LinkedList.h"


// Content Type Header
extern const char *ContentTypeHeader;

////// private types ////////////
//////////////////////
// scanner
///////////////////////
// Used to represent different types of tokens in input
typedef enum // token_type_t
{
	TT_IDENTIFIER, 
	TT_WHITESPACE, 
	TT_CRLF, 
	TT_CTRL,				// needed ??
	TT_SEPARATOR,			// ??
	TT_QUOTEDSTRING,		// ??
} token_type_t;

typedef struct // scanner_t
{
	membuffer* msg;				// raw http msg
	size_t cursor;				// current position in buffer
	xboolean entire_msg_loaded;	// set this to TRUE if the entire msg is loaded in
								//   in 'msg'; else FALSE if only partial msg in 'msg'
								//   (default is FALSE)
} scanner_t;

typedef enum // parser_pos_t
{
	POS_REQUEST_LINE,
	POS_RESPONSE_LINE,
	POS_HEADERS,
	POS_ENTITY,
	POS_COMPLETE,
} parser_pos_t;


#define ENTREAD_DETERMINE_READ_METHOD	1
#define ENTREAD_USING_CLEN				2
#define ENTREAD_USING_CHUNKED			3
#define ENTREAD_UNTIL_CLOSE				4
#define ENTREAD_CHUNKY_BODY				5
#define ENTREAD_CHUNKY_HEADERS			6


// end of private section
//////////////////
// ##################################################################################

// method in a HTTP request
typedef enum // http_method_t
{
	HTTPMETHOD_POST, 
	HTTPMETHOD_MPOST, 
	HTTPMETHOD_SUBSCRIBE, 
	HTTPMETHOD_UNSUBSCRIBE, 
	HTTPMETHOD_NOTIFY, 
	HTTPMETHOD_GET,
	HTTPMETHOD_HEAD, 
	HTTPMETHOD_MSEARCH, 
	HTTPMETHOD_UNKNOWN,
    SOAPMETHOD_POST,	 //murari
	HTTPMETHOD_SIMPLEGET
} http_method_t;

// different types of HTTP headers
#define HDR_UNKNOWN				-1
#define HDR_CACHE_CONTROL		1
#define HDR_CALLBACK			2
#define HDR_CONTENT_LENGTH		3
#define HDR_CONTENT_TYPE		4
#define HDR_DATE				5
#define HDR_EXT					6
#define HDR_HOST				7
//#define HDR_IF_MODIFIED_SINCE	8
//#define HDR_IF_UNMODIFIED_SINCE	9
//#define HDR_LAST_MODIFIED		10
#define HDR_LOCATION			11
#define HDR_MAN					12
#define HDR_MX					13
#define HDR_NT					14
#define HDR_NTS					15
#define HDR_SERVER				16
#define HDR_SEQ					17
#define HDR_SID					18
#define HDR_SOAPACTION			19
#define HDR_ST					20
#define HDR_TIMEOUT				21
#define HDR_TRANSFER_ENCODING	22
#define HDR_USN					23
#define HDR_USER_AGENT			24

//Adding new header difinition//Beg_Murari
#define HDR_ACCEPT              25
#define HDR_ACCEPT_ENCODING     26
#define HDR_ACCEPT_CHARSET      27
#define HDR_ACCEPT_LANGUAGE     28
#define HDR_ACCEPT_RANGE        29
#define HDR_CONTENT_ENCODING    30
#define HDR_CONTENT_LANGUAGE    31
#define HDR_CONTENT_LOCATION    32
#define HDR_CONTENT_RANGE       33
#define HDR_IF_RANGE            34
#define HDR_RANGE               35
#define HDR_TE                  36
//End_Murari

// status of parsing
typedef enum // parse_status_t
{
	PARSE_SUCCESS = 0,	// msg was parsed successfully
	PARSE_INCOMPLETE,	// need more data to continue
	PARSE_INCOMPLETE_ENTITY,	// for responses that don't have length specified
	PARSE_FAILURE,		// parse failed; check status code for details
	PARSE_OK,			// done partial
	PARSE_NO_MATCH,		// token not matched

	// private
	PARSE_CONTINUE_1
} parse_status_t;

typedef struct // http_header_t
{
	memptr name;		// header name as a string
	int name_id;		// header name id (for a selective group of headers only)
	membuffer value;	// raw-value; could be multi-lined; min-length = 0

    // private
    membuffer name_buf;
} http_header_t;

typedef struct // http_message_t
{
    int initialized;
	// request only
	http_method_t method;
	uri_type uri;

	// response only
	http_method_t request_method;
	int status_code;
	membuffer status_msg;

	// fields used in both request or response messages
	xboolean is_request;	// if TRUE, msg is a request, else response

	int major_version;		// http major.minor version
	int minor_version;


	LinkedList headers;
//NNS:	dlist headers;			// dlist<http_header_t *>
	memptr entity;			// message body(entity)

	// private fields
	membuffer msg;		// entire raw message
	char *urlbuf;	// storage for url string
} http_message_t;

typedef struct // http_parser_t
{
	http_message_t msg;
	int http_error_code;	// read-only; in case of parse error, this
							//  contains the HTTP error code (4XX or 5XX)

    // read-only; this is set to true if a NOTIFY request has no content-length.
    //  used to read valid sspd notify msg.
    xboolean valid_ssdp_notify_hack;

	// private data -- don't touch
	parser_pos_t position;
	int ent_position;
	unsigned int content_length;
	int chunk_size;
	size_t entity_start_position;
	scanner_t scanner;
} http_parser_t;


//--------------------------------------------------
//////////////// functions /////////////////////////
//--------------------------------------------------

#ifdef __cplusplus
extern "C" {
#endif // __cplusplus


/************************************************************************
*	Function :	httpmsg_init
*
*	Parameters :
*		INOUT http_message_t* msg ;	HTTP Message Object
*
*	Description :	Initialize and allocate memory for http message
*
*	Return : void ;
*
*	Note :
************************************************************************/
void httpmsg_init( INOUT http_message_t* msg );

/************************************************************************
*	Function :	httpmsg_destroy
*
*	Parameters :
*		INOUT http_message_t* msg ;	HTTP Message Object
*
*	Description :	Free memory allocated for the http message