Http1.1中 使用 chunked 编码传送时 没有CONTENT_LENGTH,下载之前无法确定要下载的大小. Wininet中已经内嵌该传输协议,要查看chunked块的大小只能socket底层编写获取报文. Wininet能不能直接访问原报文需走旁路.

// socket_http.cpp : Defines the entry point for the console application.
//#include "stdafx.h"
#include
#include #pragma warning(disable:4996)
#pragma warning(disable:4267)
#pragma comment(lib, "WS2_32.lib")void logFile(char *p,int len);
char fname[100];int main()
{WORD wVersionRequested;WSADATA wsaData;int bytesRecv;//Initialize WinsockwVersionRequested = MAKEWORD(2,2);bytesRecv = WSAStartup(wVersionRequested,&wsaData);if(bytesRecv != 0){printf("WSAStartup failed: %d\n", bytesRecv);return 1;}if(LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2){WSACleanup();return 1;}strcpy(fname,"index.html");_unlink(fname);char host[] = {"www.baidu.com"};hostent * ht = gethostbyname(host);struct in_addr ip_addr;memcpy(&ip_addr,ht->h_addr_list[0],4);SOCKET sockClient = socket(AF_INET,SOCK_STREAM,0);SOCKADDR_IN addrSrv;addrSrv.sin_addr = ip_addr;addrSrv.sin_family = AF_INET;addrSrv.sin_port = htons(80);char ip[20];sprintf(ip,"%d.%d.%d.%d",addrSrv.sin_addr.S_un.S_un_b.s_b1,addrSrv.sin_addr.S_un.S_un_b.s_b2,addrSrv.sin_addr.S_un.S_un_b.s_b3,addrSrv.sin_addr.S_un.S_un_b.s_b4);printf("host:%s ip:%s\r\n",host,ip);bytesRecv = connect(sockClient,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));if( bytesRecv == SOCKET_ERROR){WSACleanup();return 1;}char recvBuf[1024];char* protocolHead= "GET / HTTP/1.1\n""Host:www.baidu.com\n""Accept:*/*\n""User-Agent:Mozilla/4.0 (compatible; MSIE 5.00; Windows 98)\n""Connection:close\n\n";bytesRecv = send(sockClient,protocolHead,strlen(protocolHead)+1,0);printf("request headers:\r\n%s\r\n",protocolHead);int ic=0;while( bytesRecv != SOCKET_ERROR ){memset(recvBuf,0,1024);bytesRecv = recv(sockClient,recvBuf,1024,0);if(ic==0)printf("response headers[%ld]:\r\n%s\r\n",bytesRecv,recvBuf);if(ic==1)printf("body [%ld]:\r\n%s",bytesRecv,recvBuf);ic++;if ( bytesRecv == 0 || bytesRecv == WSAECONNRESET ) {printf( "Connection Closed.\n");break;}logFile(recvBuf,bytesRecv);}closesocket(sockClient);WSACleanup();return 0;
}void logFile(char *p,int len)
{FILE *fp = fopen(fname,"a+");if(!fp) return;fwrite(p,1,len,fp);fclose(fp);
}----------------------------------------------------------------------
运行结果
host:www.baidu.com ip:119.75.218.77request headers:
GET / HTTP/1.1
Host:www.baidu.com
Accept:*/*
User-Agent:Mozilla/4.0 (compatible; MSIE 5.00; Windows 98)
Connection:closeresponse headers[633]:
HTTP/1.1 200 OK
Date: Sun, 13 Apr 2014 18:24:51 GMT
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Connection: Close
Vary: Accept-Encoding
Set-Cookie: BAIDUID=10AA88D7B6D34E65F9FF8A384BE63FE9:FG=1; expires=Thu, 31-Dec-37 23:55:55 GMT; max-age=2147483647; path=/; domain=.baidu.com
Set-Cookie: BDSVRTM=0; path=/
Set-Cookie: H_PS_PSSID=5778_5991_1421_5225_5848_4760_6017_5856_5918; path=/; domain=.baidu.com
P3P: CP=" OTI DSP COR IVA OUR IND COM "
Cache-Control: private
Expires: Sun, 13 Apr 2014 18:24:20 GMT
X-Powered-By: HPHP
Server: BWS/1.1
BDPAGETYPE: 1
BDQID: 0x875baba2004f0570
BDUSERID: 0body [1024]:
d27b