httpcli.h

dget是一个基于Linux平台的多线程下载工具, 采用C++开发。主要支持FTP, HTTP, MMS, RTSP协议下载, 目前为止主要实现了FTP, HTTP, MMS,RTSP协议的多线程下载

#ifndef __HTTPCLI_H
#define __HTTPCLI_H

#include "Url.h"
#include "Socket.h"
#include "Task.h"

/* Some status code validation macros: */
#define H_20X(x)        (((x) >= 200) && ((x) < 300))
#define H_PARTIAL(x)    ((x) == HTTP_PARTIAL_CONTENTS)
#define H_REDIRECTED(x) (((x) == HTTP_MOVED_PERMANENTLY) || ((x) == HTTP_MOVED_TEMPORARILY))

/* HTTP/1.0 status codes from RFC1945, given for reference. */
/* Successful 2xx. */
#define HTTP_OK                200
#define HTTP_CREATED           201
#define HTTP_ACCEPTED          202
#define HTTP_NO_CONTENT        204
#define HTTP_PARTIAL_CONTENTS  206

/* Redirection 3xx. */
#define HTTP_MULTIPLE_CHOICES  300
#define HTTP_MOVED_PERMANENTLY 301
#define HTTP_MOVED_TEMPORARILY 302
#define HTTP_NOT_MODIFIED      304

/* Client error 4xx. */
#define HTTP_BAD_REQUEST       400
#define HTTP_UNAUTHORIZED      401
#define HTTP_FORBIDDEN         403
#define HTTP_NOT_FOUND         404

/* Server errors 5xx. */
#define HTTP_INTERNAL          500
#define HTTP_NOT_IMPLEMENTED   501
#define HTTP_BAD_GATEWAY       502
#define HTTP_UNAVAILABLE       503

#define DYNAMIC_LINE_BUFFER 40

typedef struct 
{
    long Len; 			// Received length. 
    long ContentLen; 		//Expected length. 
    long RestVal;		// The restart value. 
    int Result;			// The result of last read.
	
    /*
     * added by grendel
     * * -1 = accept ranges not found
     * *  0 = accepts range is none
     * *  1 = accepts ranges
     */

    int AcceptRanges;
    char * NewLoc;		// New location (redirection). 
    char * RemoteTime;	//Remote time-stamp string. 
    char * Error;		// Textual HTTP error. 
    int StatusCode;		// Status code. 
    long dlTime;		//Time of the download. 
} HttpStat;

class THttpCli 
{
private :	
	
	TUrl * up;
	int StatusCode;
	char * hdr;
	TSocketCli * Sckp;
	
public  :
	
	THttpCli(TUrl * u);
	~THttpCli(void);
	
	uerr_t Connect(void);
	uerr_t Disconnect(void);
	
	int BufReadChar(int fd, char * ret);
	int BufPeek(int fd, char * ret);

 	uerr_t FetchNextHeader(int fd, char **hdr);	
	int ParseStatLine(const char *hdr, const char **rp);
	int SkipLws(const char *hdr);
	
	long GetLen(const char *hdr);
	long GetRange(const char *hdr);
	char * GetLocation(const char *hdr);
	char * GetModified(const char *hdr);
	int GetAcceptRanges(const char *hdr);
	
	uerr_t GetHttpInfo(TUrl * up, HttpStat * hs);
	uerr_t FetchHeaders(int Sock, TUrl * up, HttpStat * hs, char * Cmd);

	uerr_t RetrFileKnownSize(TThread * This);
	uerr_t RetrFileUnknownSize(TThread * This);
	
	uerr_t GetFileChunk(TThread * This);
	uerr_t GetCompleteFile(TThread * This);

//	uerr_t SearchMirrorSite(TThread * This);

	uerr_t RedirectionParse(TUrl * up, HttpStat * hsp);

};
#endif