socket 联网后recv没有返回数据
利用socket与www.baidu.com建立连接 发送get数据 但是收到的数据是0 麻烦帮忙看下下面的代码 谢谢
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.


[self Connect:@"www.baidu.com" content:nil];
}

-(NSMutableString *)makeHttpHeader:(NSString*)hostName
{
NSMutableString * header = [[NSMutableString alloc] init];

[header appendFormat:@"GET "];
[header appendFormat:@"HTTP/1.1\r\n"];
[header appendFormat:KENTER];

[header appendFormat:@"Host:"];
[header appendFormat:hostName];
[header appendFormat:@"\r\n\r\n"];


NSLog(@"%@",header);

return header;

}


-(NSString*)getIpAddressorHost:(NSString*)theHost
{
struct hostent * host = gethostbyname([theHost UTF8String]);

if( !host )
{
herror("resolv");
return NULL;
}

struct in_addr ** list = (struct in_adr**)host->h_addr_list;
NSString * addressString = [NSString stringWithCString:inet_ntoa(*list[0])];

NSLog(@"IPAddr is:%@",addressString);//这里的 IP地址 是对的
return addressString;
}

-(void)Connect:(NSString*)hostName content:(NSString*)contentSended
{
if((sockfd = socket(AF_INET,SOCK_STREAM,0))== -1 )
{
perror("SOCKET error");
exit(1);
}

their_addr.sin_family = AF_INET;
their_addr.sin_addr.s_addr = inet_addr([[self getIpAddressorHost:hostName] UTF8String]);

their_addr.sin_port = htons(80);
bzero(&(their_addr.sin_zero),8);

int conn = connect(sockfd , (struct sockaddr*)&their_addr , sizeof(struct sockaddr));

NSLog(@"conn:%d",conn);

if( conn != -1 )
{
char readBuf[512]={0};

int recvLen = 0;

NSMutableString *httpContent = [self makeHttpHeader:hostName];

if( contentSended != nil )
{
[httpContent appendFormat:contentSended];
}

NSData * data = [httpContent dataUsingEncoding:NSISOLatin1StringEncoding];
ssize_t dataSended = send(sockfd,[data bytes],[data length],0);

NSLog(@"Send:%d",(int)dataSended);//这里发送有成功的

NSMutableString * readString = [[NSMutableString alloc]init];


recvLen = recv(sockfd , readBuf,sizeof(readBuf),0);

NSLog(@"len2:%d",recvLen);

close(sockfd);
}
}


这里使用的是 阻塞的方式 代码运行之后过一段时间会显示 len2:0
也就是说没有接受到任何的东西，请问这个大概的原因在哪里？

谢谢各位了！
[解决办法]
baidu是不会让你用socket连上的...
找个测试socket的工具吧
[解决办法]