httpreadwrite.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_HTTPREADWRITE_H
#define GENLIB_NET_HTTP_HTTPREADWRITE_H

#include "config.h"
#include "util.h"
#include "sock.h"
#include "httpparser.h"

// timeout in secs
#define HTTP_DEFAULT_TIMEOUT (30 + MINIMUM_DELAY)



#ifdef __cplusplus
#extern "C" {
#endif

/************************************************************************
* Function: http_FixUrl													
*																		
* Parameters:															
*	IN uri_type* url ;			URL to be validated and fixed
*	OUT uri_type* fixed_url ;	URL after being fixed.
*																		
* Description: Validates URL											
*																		
* Returns:																
*	 UPNP_E_INVALID_URL													
* 	 UPNP_E_SUCCESS														
************************************************************************/
int http_FixUrl( IN uri_type* url, OUT uri_type* fixed_url );

/************************************************************************
* Function: http_FixStrUrl												
*																		
* Parameters:															
*	IN char* urlstr ; 			Character string as a URL				
*	IN int urlstrlen ; 			Length of the character string								
*	OUT uri_type* fixed_url	;	Fixed and corrected URL
*																		
* Description: Parses URL and then validates URL						
*																		
* Returns:																
*	 UPNP_E_INVALID_URL													
* 	 UPNP_E_SUCCESS														
************************************************************************/
int http_FixStrUrl( IN char* urlstr, IN int urlstrlen, OUT uri_type* fixed_url );


/************************************************************************
* Function: http_Connect												
*																		
* Parameters:															
*	IN uri_type* destination_url ; URL containing destination information					
*	OUT uri_type *url ;			   Fixed and corrected URL
*																		
* Description: Gets destination address from URL and then connects to the 
*	remote end
*																		
* Returns:																
*	socket descriptor on sucess											
*	UPNP_E_OUTOF_SOCKET													
*	UPNP_E_SOCKET_CONNECT on error										
************************************************************************/
int http_Connect( IN uri_type* destination_url, OUT uri_type *url );

/************************************************************************
* Function: http_RecvMessage											
*																		
* Parameters:															
*	IN SOCKINFO *info ;					Socket information object
*	OUT http_parser_t* parser,			HTTP parser object
*	IN http_method_t request_method ;	HTTP request method					
*	IN OUT int* timeout_secs ;			time out											
*	OUT int* http_error_code ;			HTTP error code returned
*																		
* Description: Get the data on the socket and take actions based on the 
*	read data to modify the parser objects buffer. If an error is reported 
*	while parsing the data, the error code is passed in the http_errr_code 
*	parameter
*																		
* Returns:																
*	 UPNP_E_BAD_HTTPMSG													
* 	 UPNP_E_SUCCESS														
************************************************************************/
int http_RecvMessage( IN SOCKINFO *info, OUT http_parser_t* parser,
		IN http_method_t request_method, 
		IN OUT int* timeout_secs,
		OUT int* http_error_code );


/************************************************************************
* Function: http_SendMessage											
*																		
* Parameters:															
*	IN SOCKINFO *info ;		Socket information object
*	IN OUT int * TimeOut ; 	time out value											
*	IN const char* fmt, ...	 Pattern format to take actions upon								
*																		
* Description: Sends a message to the destination based on the			
*	IN const char* fmt parameter										
*	fmt types:															
*		'f':	arg = const char * file name							
*		'm':	arg1 = const char * mem_buffer; arg2= size_t buf_length	
*	E.g.:																
*		char *buf = "POST /xyz.cgi http/1.1\r\n\r\n";					
*		char *filename = "foo.dat";										
*		int status = http_SendMessage( tcpsock, "mf",					
*					buf, strlen(buf),	// args for memory buffer		
*					filename );			// arg for file					
*																		
* Returns:																
*	UPNP_E_OUTOF_MEMORY													
* 	UPNP_E_FILE_READ_ERROR												
*	UPNP_E_SUCCESS														
************************************************************************/
int http_SendMessage( IN SOCKINFO *info, IN OUT int* timeout_secs, 
					  IN const char* fmt, ... );

/************************************************************************
* Function: http_RequestAndResponse										
*																		
* Parameters:															
*	IN uri_type* destination ;		Destination URI object which contains 
*									remote IP address among other elements
*	IN const char* request ;		Request to be sent
*	IN size_t request_length ;		Length of the request
*	IN http_method_t req_method ;	HTTP Request method
*	IN int timeout_secs ;			time out value
*	OUT http_parser_t* response	;	Parser object to receive the repsonse
*																		
* Description: Initiates socket, connects to the destination, sends a	
*	request and waits for the response from the remote end				
*																		
* Returns:																
*	UPNP_E_SOCKET_ERROR													
* 	UPNP_E_SOCKET_CONNECT												
*	Error Codes returned by http_SendMessage							
*	Error Codes returned by http_RecvMessage							
************************************************************************/
int http_RequestAndResponse( IN uri_type* destination,
						   IN const char* request, IN size_t request_length,
						   IN http_method_t req_method,
						   IN int timeout_secs, 
						   OUT http_parser_t* response );

/************************************************************************
*  return codes:
*		0 -- success
*		UPNP_E_OUTOF_MEMORY
*		UPNP_E_TIMEDOUT
*		UPNP_E_BAD_REQUEST
*		UPNP_E_BAD_RESPONSE
*		UPNP_E_INVALID_URL
*		UPNP_E_SOCKET_READ
*		UPNP_E_SOCKET_WRITE
************************************************************************/

/************************************************************************
*	Function :	http_Download
*
*	Parameters :
*		IN const char* url_str :	String as a URL
*		IN int timeout_secs :		time out value
*		OUT char** document :		buffer to store the document extracted
*									from the donloaded message.
*		OUT int* doc_length :		length of the extracted document
*	    OUT char* content_type :	Type of content
*
*	Description :	Download the document message and extract the document 
*		from the message.
*
*	Return : int;
*		UPNP_E_SUCCESS;
*		UPNP_E_INVALID_URL;
*			
*
*	Note :
************************************************************************/
int http_Download( IN const char* url, 
				   IN int timeout_secs,
				   OUT char** document, OUT int* doc_length,
				   OUT char* content_type );


/************************************************************************
*	Function :	http_WriteHttpPost
*
*	Parameters :
*		IN void *Handle :		Handle to the http post object
*		IN char *buf :			Buffer to send to peer, if format used
*								is not UPNP_USING_CHUNKED, 
*		IN unsigned int *size :	Size of the data to be sent.
*		IN int timeout :		time out value
*
*	Description :	Formats data if format used is UPNP_USING_CHUNKED.
*		Writes data on the socket connected to the peer.
*
*	Return : int ;
*		UPNP_E_SUCCESS - On Success
*		UPNP_E_INVALID_PARAM - Invalid Parameter
*		-1 - On Socket Error.
*
*	Note :
************************************************************************/
int http_WriteHttpPost(IN void *Handle,
		       IN char *buf,
		       IN unsigned int *size,
		       IN int timeout);

/************************************************************************
*	Function :	http_CloseHttpPost
*
*	Parameters :
*		IN void *Handle :			Handle to the http post object
*		IN OUT int *httpStatus :	HTTP status returned on receiving a
*									response message
*		IN int timeout :			time out value
*
*	Description :	Sends remaining data if using  UPNP_USING_CHUNKED 
*		format. Receives any more messages. Destroys socket and any socket
*		associated memory. Frees handle associated with the HTTP POST msg.
*
*	Return : int ;
*		UPNP_E_SUCCESS - On Sucess ;
*		UPNP_E_INVALID_PARAM  - Invalid Parameter;
*
*	Note :
************************************************************************/
int http_CloseHttpPost(IN void *Handle, 
		       IN OUT int *httpStatus,
		       IN int timeout);