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!
- (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!
找个测试socket的工具吧
好吧,我仔细看了一下,你这个80端口的http请求...似乎应该有点反应哈~
要不你试试这个软件http://share.eepw.com.cn/share/download/id/57680
把自己电脑当主机,自己定义一个端口连一下看看.
你得另外创建一个socket收
socket是一个标示符 如果新创建了一个 那就是说原来的关闭了的
关闭了怎么接受?
意思是不要用送信的socket了,再创建一个socket2。
你确定吗? 我在win32 或者 MTK上 从来都不是这样操作的 也没见过你这样操作的啊
TCP的是不可以的,这个是理论,很久以前我应该是这样做的。现在也记不清了。
你试一下就好了。