在 winsock 中用 C++ 创建一个套接字并连接到 google 并在响应结束时得到一些垃圾
Made a socket in C++ in winsock and connected to google and am getting some garbage at the end of the response
我制作了一个简单的网络浏览器，我能够连接到页面 www.google.com/?gws_rd=ssl 上的 Google，并且我获得了所有 http 信息，例如 Cache-Control:、Content-Type: 等但最后一部分是垃圾，这就是它给我的：
HTTP/1.1 200 OK Date: Wed, 19 Aug 2015 03:38:22 GMT
Expires: -1
Cache-Control: private, max-age=0
Content-Type: text/html; charset=UTF-8
P3P: CP="This is not a P3P policy! See http://www.google.com/support/accounts/bi
n/answer.py?hl=en&answer=151657 for more info."
Content-Encoding: gzip
Server: gws
Content-Length: 14534
X-XSS-Protection: 1; mode=block
X-Frame-Options: SAMEORIGIN
Set-Cookie: PREF=ID=1111111111111111:FF=0:TM=1439955502:LM=1439955502:V=1:S=juTG
4tnW5tH5E6BF; expires=Fri, 18-Aug-2017 03:38:22 GMT; path=/; domain=.google.com
Set-Cookie: NID=70=glka-fZspN0pbH8M2m0Oay-dXvaHNwyMqKB-O4dn7ZgObHTbnn7dyc4cfn_uX
XKOobdvfpksNRCV5uM1QWPGXV_MjfxdvW2aQQ4zrEtfdxnZ4IxuPQFM61B_ZI0wDTsJ; expires=Thu
, 18-Feb-2016 03:38:22 GMT; path=/; domain=.google.com; HttpOnly
▼ï
Bytes received: 3316
From server: ⁿh╖6Ü╗ú»╠╟²ú}╪φ▼²h▌<¢Füg┴½ó┬k■Θµ¢←┤┼
ƒz~ßD╓$╕lw[²▬⌡G¢╕*r|!╩╓⌂╫ñäk┬ÿ.─E▬ÿ≈╨▓ W@D╠y√┐☺àY{J╙Z"╞ëf±4▄aeP↨⌐"╔S¡²C╟╜,?⌠╢|║┤
ÿ√╢φûΓå-╔╖n¢<╞3|(₧&-╖ë>aJVz╛ÖF┌§Θº`á╙⌠≤mlk·ñu
╞?╧m▄û¢ú┘♣âúΘéö>◄╣Θ╝░që└â₧ƒ┼▓┐l·Äu╛▀û½^Ä│⌠kΩò²╔╗ú▼m`Ä ⁿh▼=nπ±@╣╝²²?Γå▒æ~╒ⁿ╟Å]ΦF‼
╚╒R╒Öêß^╧╪O7ΣB?ºß∩φl█.âq)≈«(R→τå┌&«DZ¡(╘╬α◄╗ív:Fñk!}8Ü ┐╬♂E.♥k╘Q$ƒ§%
这是我的代码：
#include <windows.h>
#include <winsock2.h>
#include <conio.h>
#include <stdio.h>
#include <iostream>
using namespace std;
#define SCK_VERSION2 0x0202
#define DEFAULT_BUFLEN 12000
#define DEFAULT_PORT 27015
namespace Globals{
extern string input = "";
}
using namespace Globals;
int sck() {
//----------------------
// Declare and initialize variables.
WSADATA wsaData;
int iResult;
SOCKET ConnectSocket = INVALID_SOCKET;
struct sockaddr_in clientService;
char name[500] = "";
char ipADDRESS[500] = "";
char sPORT[500] = "";
sockaddr_in sName;
int sNameSize = sizeof(sName);
char const* sendbuf = "GET /?gws_rd=ssl HTTP/1.1\r\n"
"Host: www.google.com:80\r\n"
"User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.5) Gecko/20091102 Firefox/3.5.5 (.NET CLR 3.5.30729)\r\n"
"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n"
"Accept-Language: en-us,en;q=0.5\r\n"
"Accept-Encoding: gzip,deflate\r\n"
"Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7\r\n"
"Keep-Alive: 300\r\n"
"Connection: keep-alive\r\n"
"Pragma: no-cache\r\n"
"DNT: 1"
"Cache-Control: no-cache\r\n\r\n";
char recvbuf[DEFAULT_BUFLEN];
int recvbuflen = DEFAULT_BUFLEN; //23.214.132.132 GoDaddy.com
int WSAERROR = WSAGetLastError();
//system("color 04");
//----------------------
// Initialize Winsock
iResult = WSAStartup(MAKEWORD(2,2), &wsaData);
if (iResult != NO_ERROR) {
printf("WSAStartup failed: %d\n", iResult);
return 1;
}
//----------------------
// Create a SOCKET for connecting to server
ConnectSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (ConnectSocket == INVALID_SOCKET) {
printf("Error at socket(): %i\n", WSAGetLastError() );
WSACleanup();
return 1;
}
//----------------------
// The sockaddr_in structure specifies the address family,
// IP address, and port of the server to be connected to.
printf("IP ADDRESS: 74.125.196.191 is Google \n");
cin >> ipADDRESS;
printf("PORT: \n");
cin >> sPORT;
u_short PORT = strtoul(sPORT, NULL, 0);
clientService.sin_family = AF_INET;
clientService.sin_addr.s_addr = inet_addr(ipADDRESS);
clientService.sin_port = htons(PORT);
//----------------------
// Connect to server.
iResult = connect( ConnectSocket, (SOCKADDR*) &clientService, sizeof(clientService) );
if ( iResult == SOCKET_ERROR) {
closesocket (ConnectSocket);
printf("Unable to connect to server: %i\n", WSAGetLastError());
WSACleanup();
return 1;
}
//----------------------
//Get local host name
iResult = gethostname(name, sizeof(name));
if (iResult == NO_ERROR) {
printf("Host Name: %s\n", name);
}
else if (iResult == SOCKET_ERROR) {
printf("Could not resolve host name: %i", WSAGetLastError());
}
//------------------------
//Get peer name
iResult = getpeername(ConnectSocket, (struct sockaddr*)&sName, &sNameSize);
if (iResult == NO_ERROR)
printf("Peer Name: %s\n", inet_ntoa(sName.sin_addr));
else if (iResult == SOCKET_ERROR)
printf("Could not get peer name: %i\n", WSAGetLastError());
//-------------------------
// Send an initial buffer
iResult = send( ConnectSocket, sendbuf, (int)strlen(sendbuf), 0 );
if (iResult == SOCKET_ERROR) {
printf("send failed: %d\n", WSAGetLastError());
closesocket(ConnectSocket);
WSACleanup();
return 1;
}
else
printf("Bytes Sent: %i\n", iResult);
//-----------------------------
// shutdown the connection since no more data will be sent
iResult = shutdown(ConnectSocket, SD_SEND);
if (iResult == SOCKET_ERROR) {
printf("shutdown failed: %d\n", WSAGetLastError());
closesocket(ConnectSocket);
WSACleanup();
return 1;
}
// Receive until the peer closes the connection
do {
iResult = recv(ConnectSocket, recvbuf, recvbuflen, 0);
if ( iResult > 0 ) {
printf("Bytes received: %d\n", iResult); //printf("Bytes received: %d\n", iResult);
printf("From server: %s\n", recvbuf);
}
else if ( iResult == 0 )
printf("Connection closed\n");
else if (WSAERROR == WSAETIMEDOUT)
printf("recv failed: WSAETIMEDOUT\n");
} while( iResult > 0 );
// cleanup
closesocket(ConnectSocket);
WSACleanup();
system("PAUSE");
return 0;
}
int main() {
sck();
}
你发送的 Accept-Encoding header 告诉服务器你可以接受 gzip 和 deflate 编码，这意味着你必须寻找 Content-Encoding header并相应地解码内容。
在这种情况下，内容已被 gzip 压缩，因此您需要在打印之前将其解压缩。
最简单的解决方案是删除 Accept-Encoding header。
我制作了一个简单的网络浏览器，我能够连接到页面 www.google.com/?gws_rd=ssl 上的 Google，并且我获得了所有 http 信息，例如 Cache-Control:、Content-Type: 等但最后一部分是垃圾，这就是它给我的：
HTTP/1.1 200 OK Date: Wed, 19 Aug 2015 03:38:22 GMT
Expires: -1
Cache-Control: private, max-age=0
Content-Type: text/html; charset=UTF-8
P3P: CP="This is not a P3P policy! See http://www.google.com/support/accounts/bi
n/answer.py?hl=en&answer=151657 for more info."
Content-Encoding: gzip
Server: gws
Content-Length: 14534
X-XSS-Protection: 1; mode=block
X-Frame-Options: SAMEORIGIN
Set-Cookie: PREF=ID=1111111111111111:FF=0:TM=1439955502:LM=1439955502:V=1:S=juTG
4tnW5tH5E6BF; expires=Fri, 18-Aug-2017 03:38:22 GMT; path=/; domain=.google.com
Set-Cookie: NID=70=glka-fZspN0pbH8M2m0Oay-dXvaHNwyMqKB-O4dn7ZgObHTbnn7dyc4cfn_uX
XKOobdvfpksNRCV5uM1QWPGXV_MjfxdvW2aQQ4zrEtfdxnZ4IxuPQFM61B_ZI0wDTsJ; expires=Thu
, 18-Feb-2016 03:38:22 GMT; path=/; domain=.google.com; HttpOnly
▼ï
Bytes received: 3316
From server: ⁿh╖6Ü╗ú»╠╟²ú}╪φ▼²h▌<¢Füg┴½ó┬k■Θµ¢←┤┼
ƒz~ßD╓$╕lw[²▬⌡G¢╕*r|!╩╓⌂╫ñäk┬ÿ.─E▬ÿ≈╨▓ W@D╠y√┐☺àY{J╙Z"╞ëf±4▄aeP↨⌐"╔S¡²C╟╜,?⌠╢|║┤
ÿ√╢φûΓå-╔╖n¢<╞3|(₧&-╖ë>aJVz╛ÖF┌§Θº`á╙⌠≤mlk·ñu
╞?╧m▄û¢ú┘♣âúΘéö>◄╣Θ╝░që└â₧ƒ┼▓┐l·Äu╛▀û½^Ä│⌠kΩò²╔╗ú▼m`Ä ⁿh▼=nπ±@╣╝²²?Γå▒æ~╒ⁿ╟Å]ΦF‼
╚╒R╒Öêß^╧╪O7ΣB?ºß∩φl█.âq)≈«(R→τå┌&«DZ¡(╘╬α◄╗ív:Fñk!}8Ü ┐╬♂E.♥k╘Q$ƒ§%
这是我的代码：
#include <windows.h>
#include <winsock2.h>
#include <conio.h>
#include <stdio.h>
#include <iostream>
using namespace std;
#define SCK_VERSION2 0x0202
#define DEFAULT_BUFLEN 12000
#define DEFAULT_PORT 27015
namespace Globals{
extern string input = "";
}
using namespace Globals;
int sck() {
//----------------------
// Declare and initialize variables.
WSADATA wsaData;
int iResult;
SOCKET ConnectSocket = INVALID_SOCKET;
struct sockaddr_in clientService;
char name[500] = "";
char ipADDRESS[500] = "";
char sPORT[500] = "";
sockaddr_in sName;
int sNameSize = sizeof(sName);
char const* sendbuf = "GET /?gws_rd=ssl HTTP/1.1\r\n"
"Host: www.google.com:80\r\n"
"User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.5) Gecko/20091102 Firefox/3.5.5 (.NET CLR 3.5.30729)\r\n"
"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n"
"Accept-Language: en-us,en;q=0.5\r\n"
"Accept-Encoding: gzip,deflate\r\n"
"Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7\r\n"
"Keep-Alive: 300\r\n"
"Connection: keep-alive\r\n"
"Pragma: no-cache\r\n"
"DNT: 1"
"Cache-Control: no-cache\r\n\r\n";
char recvbuf[DEFAULT_BUFLEN];
int recvbuflen = DEFAULT_BUFLEN; //23.214.132.132 GoDaddy.com
int WSAERROR = WSAGetLastError();
//system("color 04");
//----------------------
// Initialize Winsock
iResult = WSAStartup(MAKEWORD(2,2), &wsaData);
if (iResult != NO_ERROR) {
printf("WSAStartup failed: %d\n", iResult);
return 1;
}
//----------------------
// Create a SOCKET for connecting to server
ConnectSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (ConnectSocket == INVALID_SOCKET) {
printf("Error at socket(): %i\n", WSAGetLastError() );
WSACleanup();
return 1;
}
//----------------------
// The sockaddr_in structure specifies the address family,
// IP address, and port of the server to be connected to.
printf("IP ADDRESS: 74.125.196.191 is Google \n");
cin >> ipADDRESS;
printf("PORT: \n");
cin >> sPORT;
u_short PORT = strtoul(sPORT, NULL, 0);
clientService.sin_family = AF_INET;
clientService.sin_addr.s_addr = inet_addr(ipADDRESS);
clientService.sin_port = htons(PORT);
//----------------------
// Connect to server.
iResult = connect( ConnectSocket, (SOCKADDR*) &clientService, sizeof(clientService) );
if ( iResult == SOCKET_ERROR) {
closesocket (ConnectSocket);
printf("Unable to connect to server: %i\n", WSAGetLastError());
WSACleanup();
return 1;
}
//----------------------
//Get local host name
iResult = gethostname(name, sizeof(name));
if (iResult == NO_ERROR) {
printf("Host Name: %s\n", name);
}
else if (iResult == SOCKET_ERROR) {
printf("Could not resolve host name: %i", WSAGetLastError());
}
//------------------------
//Get peer name
iResult = getpeername(ConnectSocket, (struct sockaddr*)&sName, &sNameSize);
if (iResult == NO_ERROR)
printf("Peer Name: %s\n", inet_ntoa(sName.sin_addr));
else if (iResult == SOCKET_ERROR)
printf("Could not get peer name: %i\n", WSAGetLastError());
//-------------------------
// Send an initial buffer
iResult = send( ConnectSocket, sendbuf, (int)strlen(sendbuf), 0 );
if (iResult == SOCKET_ERROR) {
printf("send failed: %d\n", WSAGetLastError());
closesocket(ConnectSocket);
WSACleanup();
return 1;
}
else
printf("Bytes Sent: %i\n", iResult);
//-----------------------------
// shutdown the connection since no more data will be sent
iResult = shutdown(ConnectSocket, SD_SEND);
if (iResult == SOCKET_ERROR) {
printf("shutdown failed: %d\n", WSAGetLastError());
closesocket(ConnectSocket);
WSACleanup();
return 1;
}
// Receive until the peer closes the connection
do {
iResult = recv(ConnectSocket, recvbuf, recvbuflen, 0);
if ( iResult > 0 ) {
printf("Bytes received: %d\n", iResult); //printf("Bytes received: %d\n", iResult);
printf("From server: %s\n", recvbuf);
}
else if ( iResult == 0 )
printf("Connection closed\n");
else if (WSAERROR == WSAETIMEDOUT)
printf("recv failed: WSAETIMEDOUT\n");
} while( iResult > 0 );
// cleanup
closesocket(ConnectSocket);
WSACleanup();
system("PAUSE");
return 0;
}
int main() {
sck();
}
你发送的 Accept-Encoding header 告诉服务器你可以接受 gzip 和 deflate 编码，这意味着你必须寻找 Content-Encoding header并相应地解码内容。
在这种情况下，内容已被 gzip 压缩，因此您需要在打印之前将其解压缩。
最简单的解决方案是删除 Accept-Encoding header。