首先，感谢大家阅读本文并提供帮助，我非常感谢。
其次我很抱歉，但我还是这个网站的新手，英语不是我的母语，所以我可能会做一些格式和语言错误。我提前道歉。
另外，我的C知识不是很好，但我愿意学习和提高。
现在，手头的事情：
我需要做的是创建一个客户端和一个服务器，并让服务器监听传入的连接。
然后我让客户端向服务器发送一个很大的文本文件（我知道它只会是一个文件）。
然后服务器将对文件执行一些操作（它将在发送的文件上运行一个脚本，在输出中生成另一个名为“output.txt”的文件）。然后服务器需要将 output.txt 文件发送回客户端。
现在，我有点了解如何制作客户端和服务器（我阅读了 beej 指南和这个网站上的其他一些东西），即使我可能犯了一些错误。我需要一些帮助服务器接收文件，然后调用脚本并将另一个文件发送回客户端。现在我所做的是服务器和客户端......我真的不知道如何继续。
在旁注中，我使用我在这个网站和互联网上找到的文件制作了这些文件，我希望它们不会太乱，因为我不是一个好的程序员。
这是client.c
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <pthread.h>
#define SOCKET_PORT "50000"
#define SOCKET_ADR "localhost"
#define filename "/home/aryan/Desktop/input.txt"
void error(const char *msg)
{
perror(msg);
exit(0);
}
int main()
{
/* Making the client */
int sockfd, portno, n;
struct sockaddr_in serv_addr;
struct hostent *server;
char buffer[256];
portno = atoi(SOCKET_PORT);
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
error("ERROR opening socket");
server = gethostbyname(SOCKET_ADR);
if (server == NULL)
{
fprintf(stderr,"ERROR, no such host\n");
exit(0);
}
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
bcopy((char *)server->h_addr,
(char *)&serv_addr.sin_addr.s_addr,
server->h_length);
serv_addr.sin_port = htons(portno);
if (connect(sockfd,(struct sockaddr *) &serv_addr,sizeof(serv_addr)) < 0)
error("ERROR connecting");
/* Time to send the file */
FILE *pf;
unsigned long fsize;
pf = fopen(filename, "rb");
if (pf == NULL)
{
printf("File not found!\n");
return 1;
}
else
{
printf("Found file %s\n", filename);
fseek(pf, 0, SEEK_END);
fsize = ftell(pf);
rewind(pf);
printf("File contains %ld bytes!\n", fsize);
printf("Sending the file now");
}
while (1)
{
// Read data into buffer. We may not have enough to fill up buffer, so we
// store how many bytes were actually read in bytes_read.
int bytes_read = fread(buffer, sizeof(char),sizeof(buffer), pf);
if (bytes_read == 0) // We're done reading from the file
break;
if (bytes_read < 0)
{
error("ERROR reading from file");
}
// You need a loop for the write, because not all of the data may be written
// in one call; write will return how many bytes were written. p keeps
// track of where in the buffer we are, while we decrement bytes_read
// to keep track of how many bytes are left to write.
void *p = buffer;
while (bytes_read > 0)
{
int bytes_written = write(sockfd, buffer, bytes_read);
if (bytes_written <= 0)
{
error("ERROR writing to socket\n");
}
bytes_read -= bytes_written;
p += bytes_written;
}
}
printf("Done Sending the File!\n");
printf("Now Closing Connection.\n");
fclose(pf);
close(sockfd);
return 0;
}
这是 server.c：
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <signal.h>
#include <pthread.h>
#define SOCKET_PORT 50000
#define filename "/home/aryan/Desktop/output.txt"
void error(const char *msg)
{
perror(msg);
exit(1);
}
void* client_thread_proc(void* arg)
{
char buffer[256];
struct sockaddr_in serv_addr, cli_addr;
int n;
FILE *fp;
int thisfd = (int)arg;
printf("Server %d: accepted = %d\n", getpid(), thisfd);
if (thisfd < 0)
{
printf("Accept error on server\n");
error("ERROR on accept");
return NULL;
}
printf("Connection %d accepted\n", thisfd);
fp = fopen(filename, "a+b");
if (fp == NULL)
{
printf("File not found!\n");
return NULL;
}
else
{
printf("Found file %s\n", filename);
}
/* Time to Receive the File */
while (1)
{
bzero(buffer,256);
n = read(thisfd,buffer,255);
if (n < 0) error("ERROR reading from socket");
n = fwrite(buffer, sizeof(char), sizeof(buffer), fp);
if (n < 0) error("ERROR writing in file");
n = write(thisfd,"I am getting your file...",25);
if (n < 0) error("ERROR writing to socket");
} /* end child while loop */
fclose(fp);
return NULL;
}
void serve_it(int Client)
{
void* arg = (void*)Client;
pthread_t new_thread;
pthread_create( &new_thread, NULL, &client_thread_proc, arg);
}
/* Making Server */
int main()
{
int sockfd, newsockfd, portno;
socklen_t clilen;
char buffer[256];
struct sockaddr_in serv_addr, cli_addr;
int n;
FILE *fp;
signal (SIGCHLD, SIG_IGN);
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
error("ERROR opening socket");
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = INADDR_ANY;
serv_addr.sin_port = htons(SOCKET_PORT);
if (bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0)
error("ERROR on binding");
listen(sockfd,5);
clilen = sizeof(cli_addr);
while (1)
{
printf("Server %d accepting connections\n", getpid());
newsockfd = accept(sockfd, (struct sockaddr *) &cli_addr, &clilen);
serve_it(newsockfd);
} // serving loop
close(sockfd);
return 0;
}
我想要一些关于如何继续的指示...
如何使脚本继续执行从客户端到服务器的文件？
如何将新文件发送回同一客户端？
如果您能帮助我解决代码中的错误，我将不胜感激。
谢谢大家，很抱歉读了很久。祝你今天过得愉快！