服务器端是java，客户端是c，通过socket,tcp通信，客户端将一张图片传输到服务器，服务器接收完成后返回一个‘ok’字符串作为应答。运行的时候，服务器可以接收到客户端发来的图片，但是客户端无法接收到服务器的‘ok’应答。对socket了解不深，求大神指点，谢谢了~代码如下：
server(java):
import java.net.*;
import java.io.*;
public class ServerTcp {
public static void main(String args[])throws Exception{
ServerSocket server = new ServerSocket(8866);
byte[] inputByte = null;
int length = 0;
DataInputStream dis = null;
FileOutputStream fos = null;
PrintStream out = null;
fos = new FileOutputStream(new File("/home/gsw/test/cc.jpg"));
inputByte = new byte[5120];
System.out.println("等待链接...");
Socket client = server.accept();
dis = new DataInputStream(client.getInputStream());
out = new PrintStream(client.getOutputStream());
while ((length = dis.read(inputByte, 0, inputByte.length)) > 0) {
System.out.println(length);
fos.write(inputByte, 0, length);
fos.flush();
}
System.out.println("完成接收");
out.print("ok"); //服务器应答
dis.close();
out.close();
fos.close();
client.close();
server.close();
System.out.println("关闭！");
}
}
client(c):
#include
#include
#include
#include
#include
#include
#include
#include
#include
#define SER_PORT 8866
#define MAX_LEN 256
int main(int argc,char **argv)
{
int sd,rn;
struct sockaddr_in client,server;
char send_buf[MAX_LEN];
char recv_buf[MAX_LEN];
FILE *fq;
int len,opt = 1;
if( ( sd = socket(AF_INET,SOCK_STREAM,0)) == -1 )
{
perror("socket");
exit(1);
}
bzero(&server,sizeof(server));
server.sin_family = AF_INET;
server.sin_port = htons(SER_PORT);
server.sin_addr.s_addr = inet_addr("127.0.0.1");
setsockopt(sd,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt));
if( connect(sd,(struct sockaddr *)&server,sizeof(server)) < 0 )
{
perror("Connect");
close(sd);
exit(1);
}
if( ( fq = fopen("1.jpg","rb") ) == NULL )
{
perror("File open");
close(sd);
exit(1);
}
bzero(send_buf,sizeof(send_buf));
memset(send_buf, 0, MAX_LEN);
while( !feof(fq) )
{
len = fread(send_buf,1,MAX_LEN,fq);
if( len != write(sd,send_buf,len) )
{
perror("write");
break;
}
}
memset(recv_buf, 0, MAX_LEN);
printf("send all!\n");
if(read(sd,recv_buf,sizeof(recv_buf)) ==-1) //接收应答
{
perror("read");
exit(1);
}
printf("received from server:%s\n",recv_buf);
close(sd);
fclose(fq);
return 0;
}
程序也不报错，被阻塞了
server端控制台
client端
