我正在尝试将文件从java客户端发送到c服务器......问题是我的c服务器一次只接收1个字节而不管缓冲区大小......我想转移块中的数据（可能是512字节或更多）......有人可以看看并指出什么是错的或必须改变的内容......提前感谢...
c server：
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <pthread.h>
#define PORT 8880
#define filename "incoming.txt"
void* thread_proc(void *arg);
int main(int argc, char *argv[])
{
struct sockaddr_in sAddr;
int sockfd,connfd;
int status;
pthread_t thread_id;
int val;
sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
val = 1;
status = setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
if (status < 0) {
perror("Error - port");
return 0;
}
sAddr.sin_family = AF_INET;
sAddr.sin_port = htons(PORT);
sAddr.sin_addr.s_addr = INADDR_ANY;
status = bind(sockfd, (struct sockaddr *) &sAddr, sizeof(sAddr));
if (status < 0) {
perror("Error - Bind");
return 0;
}
status = listen(sockfd, 5);
if (status < 0) {
perror("Error - Listen");
return 0;
}
while(1) {
connfd = accept(sockfd, NULL, NULL);
if (connfd < 0) {
printf("Accept error on server\n");
error("ERROR on accept");
return 0;
}
printf("client connected to child thread %i with pid %i.\n", pthread_self(), getpid());
status = pthread_create(&thread_id, NULL, thread_proc, (void *) connfd);
if (status != 0) {
printf("Could not create thread.\n");
return 0;
}
sched_yield();
}
pthread_join (thread_id, NULL);
}
void* thread_proc(void *arg)
{
int connfd;
int nread,n;
char buffer[1024];
FILE *fp;
connfd = (int) arg;
fp = fopen(filename, "ab");
if (fp == NULL)
{
printf("File not found!\n");
return NULL;
}
else
{
printf("Found file %s\n", filename);
}
while (n = recv(connfd, buffer, sizeof buffer, 0) > 0) {
fwrite(buffer, sizeof(char), n, fp);
fprintf(stdout, "Received %d bytess\n", n);
}
fclose(fp);
close(connfd);
printf("client disconnected from child thread %i with pid %i.\n", pthread_self(), getpid());
return NULL;
}
java客户端：
import java.net.*;
import java.io.*;
import java.util.Arrays;
// A client for our multithreaded EchoServer.
public class client
{
public static void main(String[] args)
{
Socket socket = null;
int PORT = 8880;
// Create the socket connection to the EchoServer.
try
{
socket = new Socket("localhost", PORT);
}
catch(UnknownHostException uhe)
{
// Host unreachable
System.out.println("Unknown Host");
socket = null;
}
catch(IOException ioe)
{
// Cannot connect to port on given host
System.out.println("Cant connect to server at 8880. Make sure it is running.");
socket = null;
}
if(socket == null)
System.exit(-1);
try
{
File file = new File("ext.txt");
byte[] bytes = new byte[8192];
FileInputStream fis = new FileInputStream(file);
BufferedInputStream bis = new BufferedInputStream(fis);
OutputStream out = socket.getOutputStream();
int count,file_size;
while ((count = bis.read(bytes)) > 0) {
System.out.println(count);
out.write(bytes, 0, count);
}
out.flush();
out.close();
fis.close();
bis.close();
}
catch(IOException ioe)
{
System.out.println("Exception during communication. Server probably closed connection.");
}
finally
{
try
{
// Close the socket before quitting
socket.close();
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
}
答案 0 :(得分：0)
检查这些代码
SERVER
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <pthread.h>
#include <error.h>
#define PORT 5000
#define filename "incoming.txt"
void* thread_proc(void *arg);
int main(int argc, char *argv[])
{
struct sockaddr_in sAddr;
int sockfd,connfd;
int status;
pthread_t thread_id;
int val;
sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
val = 1;
status = setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
if (status < 0) {
perror("Error - port");
return 0;
}
sAddr.sin_family = AF_INET;
sAddr.sin_port = htons(PORT);
sAddr.sin_addr.s_addr = INADDR_ANY;
status = bind(sockfd, (struct sockaddr *) &sAddr, sizeof(sAddr));
if (status < 0) {
perror("Error - Bind");
return 0;
}
status = listen(sockfd, 5);
if (status < 0) {
perror("Error - Listen");
return 0;
}
while(1) {
connfd = accept(sockfd, NULL, NULL);
if (connfd < 0) {
printf("Accept error on server\n");
//error("ERROR on accept");
return 0;
}
printf("client connected to child thread %i with pid %i.\n", pthread_self(), getpid());
status = pthread_create(&thread_id, NULL, thread_proc, (void *) connfd);
if (status != 0) {
printf("Could not create thread.\n");
return 0;
}
sched_yield();
}
pthread_join (thread_id, NULL);
}
void* thread_proc(void *arg)
{
int connfd;
int nread,n;
char buffer[1000];
FILE *fp;
connfd = (int) arg;
fp = fopen(filename, "ab");
if (fp == NULL)
{
printf("File not found!\n");
return NULL;
}
else
{
printf("Found file %s\n", filename);
}
while ((n = recv(connfd, buffer, sizeof buffer, 0)) > 0) {
fwrite(buffer, sizeof(char), n, fp);
fprintf(stdout, "Received %d bytess\n", n);
}
fclose(fp);
close(connfd);
printf("client disconnected from child thread %i with pid %i.\n", pthread_self(), getpid());
return NULL;
}
客户端
import java.net.*;
import java.io.*;
import java.util.Arrays;
// A client for our multithreaded EchoServer.
public class client
{
public static void main(String[] args)
{
Socket socket = null;
int PORT = 5000;
// Create the socket connection to the EchoServer.
try
{
socket = new Socket("localhost", PORT);
}
catch(UnknownHostException uhe)
{
// Host unreachable
System.out.println("Unknown Host");
socket = null;
}
catch(IOException ioe)
{
// Cannot connect to port on given host
System.out.println("Cant connect to server at 5000. Make sure it is running.");
socket = null;
}
if(socket == null)
System.exit(-1);
try
{
File file = new File("ext.txt");
byte[] bytes = new byte[8192];
FileInputStream fis = new FileInputStream(file);
BufferedInputStream bis = new BufferedInputStream(fis);
OutputStream out = socket.getOutputStream();
int count,file_size;
while ((count = bis.read(bytes)) > 0) {
System.out.println(count);
out.write(bytes, 0, count);
}
out.flush();
out.close();
fis.close();
bis.close();
}
catch(IOException ioe)
{
System.out.println("Exception during communication. Server probably closed connection.");
}
finally
{
try
{
// Close the socket before quitting
socket.close();
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
}
我刚使用端口5000并使用nc命令检查你的服务器..它工作正常
我认为你需要做的就是改变你的PORT。我检查了运行它们:)
- 快乐编码 -