一.项目添加ASyncSocket
1.下载ASyncSocket库源码
2.把ASyncSocket库源码加入项目（见附件）
3.在项目增加CFNetwork框架
二、具体使用代码如下：
导入：#import "AsyncSocket.h"
//发送短消息
-(IBAction)sendString
{
NSData *data = [@"test\n" dataUsingEncoding: NSUTF8StringEncoding];
static BOOL connectOK = NO
if (!_sendSocket)
{
self.sendSocket = [[AsyncSocket alloc] initWithDelegate: self];
NSError *error;
connectOK = [_sendSocket connectToHost: @"127.0.0.1" onPort: 8000 error: &error];
if (!connectOK)
{
[self showAlert:@"连接失败"];
}else{
DLog(@"connect success!");
}
[_sendSocket setRunLoopModes:[NSArray arrayWithObject:NSRunLoopCommonModes]];
}
if (connectOK)
{
[_sendSocket writeData:data withTimeout: -1 tag: 0];
}
}
- (void)onSocket:(AsyncSocket *)sock didConnectToHost:(NSString *)host port:(UInt16)port
{
DLog(@"%s %d", __FUNCTION__, __LINE__);
[_sendSocket readDataWithTimeout: -1 tag: 0];
}
- (void)onSocket:(AsyncSocket *)sock didWriteDataWithTag:(long)tag
{
DLog(@"%s %d, tag = %ld", __FUNCTION__, __LINE__, tag);
[_sendSocket readDataWithTimeout: -1 tag: 0];
}
- (void)onSocket:(AsyncSocket *)sock willDisconnectWithError:(NSError *)err
{
DLog(@"%s %d, tag = %@", __FUNCTION__, __LINE__, err);
}
// 这里必须要使用流式数据
- (void)onSocket:(AsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag
{
NSString *msg = [[NSString alloc] initWithData: data encoding:NSUTF8StringEncoding];
DLog(@"%s %d, ==读取到从服务端返回的内容=== %@", __FUNCTION__, __LINE__, msg);
[_sendSocket readDataWithTimeout: -1 tag: 0];
}
- (void)onSocketDidDisconnect:(AsyncSocket *)sock
{
DLog(@"%s %d", __FUNCTION__, __LINE__);
self.sendSocket = nil;
}
java服务端的代码如下:
public class Server {
private ServerSocket ss;
private Socket socket;
private BufferedReader in;
private PrintWriter out;
public Server()
{
try
{
ss = new ServerSocket(8000);
System.out.println("The server is waiting your input...");
while(true)
{
socket = ss.accept();
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
out = new PrintWriter(socket.getOutputStream(), true);
String line = in.readLine();
System.out.println("you input is : " + line);
out.println("server back input is :" + line);
out.flush();
out.close();
in.close();
socket.close();
if(line.equals("exit"))
break;
}
ss.close();
} catch (IOException e) {
e.printStackTrace();
}
}
public static void main(String[] args)
{
new Server();
}
}
注意：向客户端写数据时最后需要加上\n,不然很久都不会得到服务端的返回。
上面为普通的socket服务端，最近项目采用apache mina框架建后台的socket服务端，采用上面的asyncSocket一直连接不上服务器，也在网上查询了大量的资料，最终发现需要在写入的数据后面加上0字符才能连接成功,或者采用gzip压缩后再传入服务器。ios的gzip压缩请见下一博客。
NSString *requestStrFrmt = @"发送到服务端数据";
NSData *requestData = [requestStrFrmt dataUsingEncoding:NSUTF8StringEncoding];
Byte *testByte = (Byte *)[requestData bytes];
Byte bytes[requestData.length+1];
for(int i=0;i<[requestData length];i++){
bytes[i]=testByte[i];
}
bytes[requestData.length]=0;
NSData *adata = [[NSData alloc] initWithBytes:bytes length:requestData.length+1];
[asyncSocketwriteData:adata withTimeout:-1.0tag:0];
这样服务端就能正常的读取到数据并返回了