socket传输文件.docx
使用socket的Linux上的C语言文件传输顺序服务器和客户端示例程序2022-10-1112:55使用socket的Linux上的C语言文件传输顺序服务器和客户端示例程序2022-10-2218:12服务器端程序的编译gcc-Ofile_serverfile_server.c客户端程序的编译gcc-0file_clientfileclient.c服务器程序和客户端程应当分别运行在2台计算机上.服务器端程序的运行,在一个计算机的终端执行./file_server客户端程序的运行,在另一个计算机的终端中执行.file.client运行服务器程序的计算机的IP地址根据提示输入要传输的服务器上的文件，该文件在服务器的运行目录上在实际编程和测试中,可以用2个终端代替2个计算机,这样就可以在一台计算机上测试网络程序，服务器端程序的运行,在一个终端执行./file_server客户端程序的运行,在另一个终端中执行./file_client127.0.0.1说明：存何计算机都可以通过127.0.0.1访问自己.也可以用计算机的实际IP地址代替127.0.0.1/IiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiIiiiiiiiiiiiiiiiii/fileserver.c文件传输顺序服务器示例IllllinilllllllllllllllllllllllllllllllllllllllllllllllllllllllllllIiiiiiiiiiiiiiiiii本文件是服务器的代码/ for sockaddr_in/ for socket/ for socket/ for printf#include<netinetin.h>ttinclude<systypes.h>#include<syssocket.h>include<stdio.h>include<stdlib.h>/forexit#include<string.h>/forbzero*#include<systypes.h>#include<sysstat.h>include<fcntl.h>ttinclude<unistd.h>*/ttdefineHELLO_WORLD_SERVER_PORT6666#defineLENGTH_OF_LISTEN_QUEUE20ItdefineBUFFER_SIZE1024defineFILENAMEMAXSIZE512intmain(intargc,char*argv)设置一个SOCket地址结构SerVejacIdr,代表服务器internet地址，端structsockaddr_inserver_addr;bzero(&server_addr,sizeof(server-addr);把一段内存区的内容全部设置为0server_addr.sin_family=AFINET;server_addr.sinaddr.s_addr=htons(INDDRANY);server_addr.sin_port-htons(HELLO_WORLD_SERVER_PORT);创建用于internet的流协议(TCP)SoCket,用server_socket代表服务器socketintserver_socket=socket(PF_INET,SOCK_STREAM,0);if(server_socket<0)printf(zzCreateSocketFailed!,z);exit(1);)把socket和socket地址结构联系起来if(bind(server_socket,(structsockaddr*)&server_addr,sizeof(server_addr)(printf(zzServerBindPort:%dFailed!,z,HELLO_WORLD_SERVER_PORT);exit(1);/server_socket用于监听if(listen(server_socket,LENGTH_OFLISTEN_QUEUE)printf(''ServerListenFailed!”);exit(1);while(1)服务器端要向来运行(定义客户端的socket地址结构clientaddrstructsockaddr_inclient_addr;socklen_tlength=sizeof(client_addr);接受一个到server_socket代表的socket的一个连接如果没有连接请求,就等待到有连接请求一这是accept函数的特性/accept函数返回一个新的socket,这个socket(new_serveJSOCket)用于同连接到的客户的通信new_serveJSOCket代表了服务器和客户端之间的一个通信通道/accept函数把连接到的客户端信息填写到客户端的socket地址结构client_addr中intnew_server_socket=accept(server_socket,(structsockaddr*)&c1ient_addr,length);if(newserver_socket<0)(printf(zzServerAcceptFailed!nz,);break;)charbufferBUFFER_SIZE;bzero(buffer,BUFFER_SIZE);length-recv(new_server_socket,buffer,BUFFERSIZE,0);if(length<O)(printf(zzServerRecieveDataFailed!nz,);break;)charfilenameFILE_NAME_MAX_SIZE+1;bzero(filename,FILE_NAMEJIAX_SIZE+1);strncpy(file_name,buffer,strlen(buffer)>FILE_NAME_MAX_SIZE?FILE_NAMEJfAX_SIZE:strlen(buffer)f/intfp=open(filename,ORDONLY);/if(fp<O)FILE*fp=fopen(file_name,rz,);if(NULL=fp)(printf(z,File:t%sNotFound11,z,filename);)elsebzero(buffer,BUFFER_SIZE);intfile_block_length=O;/while(file_block_length=read(fp,buffer,BUFFER_SIZE>0)while(file_block_length-fread(buffer,sizeof(char),BUFFER_SIZE,fp)>0)printf(,zfiIeblocklength=%dn,z,fiIeblocklength);发送buffer中的字符串到new_serveJSOCket,实际是给客户端if(send(newserversocket,buffer,fileblocklength,0)<0)(printf(xzSendFile:t%sFailedn,z,file_name);break;)bzero(buffer,BUFFER_SIZE);/close(fp);fclose(fp);printf(7zFile:t%sTransferFinishedn,z,file_name);)关闭与客户端的连接close(new_server_socket);关闭监听用的socketclose(server_socket);return0;)/IiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiIiiiiiiiiiiiiiiiii/fileclient.c文件传输客户端程序示例/III/ for sockaddr_in/ for socket/ for socket/ for printf/ for exit/ for bzeroIiiiiiiiiiiiiiiiii本文件是客户机的代码#include<netinetin.h>#include<systypes.h>include<syssocket.h>#include<stdio.h>include<stdlib.h>#include<string.h>*include<systypes.h>#include<sysstat.h>include<fcntl.h>#include<unistd.h>*/defineHELLO_WORLD_SERVER_PORT6666defineBUFFER_SIZE1024defineFILENAMEMAXSIZE512intmain(intargc,char*argv)(if(argc!=2)printf(,Usage:.%sServerIPAddressXnzz,argv0);exit(1);)设置一个socket地址结构CIient_addr,代表客户机internet地址，端structsockaddr_inclient_addr;bzero(&client_addr,sizeof(c1ient_addr);把一段内存区的内容全部设置为0client_addr.sin_family=AF_INET;/internet协议族client_addr.sin_addr.s_addr=htons(INADDR_ANY);/INADDR_ANY表示自动获取本玩地址client_addr.sin_port=htons(0);/0表示让系统自动分配一个空闲端口创建用于internet的流协议(TCP)SOCket,用client_socket代表客户机socketintclient_socket=socket(F_INET,SOCK_STREAM,0);if(client_socket<0)printf(zzCreateSocketFailed!nz,);exit(1);)把客户机的socket和客户机的socket地址结构联系起来if(bind(client_socket,(structsockaddr*)&client_addr,sizeof(client_addr)Printf("ClientBindPortFailed!nzz);exit(1);设置一个socket地址结构serveraddr,代表服务器的internet地址，端口structsockaddr_inserver_addr;bzero(&server_addr,sizeof(serveraddr);s
