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‎Clientmain.cpp

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#include "FTPClient.h"
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#include <iostream>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <string>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <unistd.h>
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using std::cin;
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using std::string;
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int main(int argc,char* argv[])
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{
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if (argc < 2)
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err_sys("usage: ftp <ip> [path]");
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in_addr_t serv_ip;
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if ((argc >= 2 && (serv_ip = inet_addr(argv[1]) == INADDR_NONE)))
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err_sys("invalid ip!");
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if (argc >= 3)
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strcpy(clientpath,argv[2]);
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//初始化套接字信息，获得本地路径及文件名列表
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setFileVec(clientfilevec,clientpath);
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int connSock = socket(AF_INET,SOCK_STREAM,0);
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struct sockaddr_in servaddr;
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servaddr.sin_family = AF_INET;
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servaddr.sin_addr.s_addr = htonl(serv_ip);
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servaddr.sin_port = htons(cmdport);
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if(connect(connSock,(struct sockaddr*)&servaddr,sizeof(servaddr)) < 0)
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err_sys("connect error!");
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char line[MAXLINE];
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while (true) //进行用户名和密码的身份验证
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{
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char name[20];
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char passwd[20];
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printf("username : ");
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scanf("%s",name);
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fflush(stdin);
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int nwrite = sprintf(line,"USER %s\r\n",name);
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write(connSock,line,nwrite);
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printf("password : ");
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scanf("%s",passwd);
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fflush(stdin);
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nwrite = sprintf(line,"PASS %s\r\n",passwd);
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write(connSock,line,strlen(line));
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int nread = read(connSock,line,MAXLINE);
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line[nread] = '\0';
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if (strstr(line,"WRONG") == line)
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printf("wrong username or password!\n");
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else
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break;
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}
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while (cin.get() != '\n');
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bool flag = true;
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while (flag) //处理相关命令
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{
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int numtodeal = 0;
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string filename;
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fflush(stdin);
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string str;
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getline(cin,str);
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str.erase(str.begin()+str.find_last_not_of(' ')+1,str.end()); //去除str尾部的空格
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int spacepos = str.find(' ',0);
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string cmd; //输入的命令名
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if (spacepos == string::npos)
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cmd = str;
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else
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cmd = str.substr(0,spacepos);
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int i;
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for (i = 0; i != ClientCMDNUM; ++i)
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if (cmd == ClientCMD[i])
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break;
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if (i == ClientCMDNUM)
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{
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printf("invalid command!\n");
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continue;
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}
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char* spaceptr;
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if (i < ClientCMDNUM-2) //发送给服务器端的命令处理
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{
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int nwrite = 0;
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if (spacepos == string::npos)
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nwrite = sprintf(line,"%s \r\n",ServerCMD[i]);
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else
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nwrite = sprintf(line,"%s %s\r\n",ServerCMD[i],str.substr(spacepos+1).c_str());
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line[nwrite] = '\0';
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spaceptr = strchr(line,' ')+1;
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write(connSock,line,nwrite);
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}
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switch(i)
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{
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case 3:
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showFileVec(connSock);
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break;
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case 4:
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downloadFiles(connSock);
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break;
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case 5:
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if (!splitFiles(spaceptr,filename,numtodeal))
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printf("some files are not found!\n");
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else
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uploadFiles(connSock,numtodeal);
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break;
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case 6:
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close(connSock);
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flag = false;
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break;
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case 7:
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printLocalFile(clientfilevec);
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break;
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case 8:
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str = str.substr(spacepos+1);
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if (!changeLocalDir(str))
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printf("invalid directory or permission denied!\n");
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break;
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default:
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printf("can't be here!\n");
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break;
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}
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}
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return 0;
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}

‎FTP.cpp

Lines changed: 81 additions & 0 deletions
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#include "FTP.h"
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#include <string>
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#include <vector>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include <unistd.h>
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#include <fcntl.h>
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using std::string;
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using std::vector;
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const int cmdport = 5600;
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const char rightmsg[10] = "OK\r\n";
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const char wrongmsg[10] = "WRONG\r\n";
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const char* ServerCMD[ServerCMDNUM] = {"USER","PASS","PASV","SHOW","GET","PUT","QUIT"}; //客户端发送给服务器端的命令类型
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void setFileVec(vector<string>& filevec,char* path) //将路径切换到path，同时将新路径下的文件填入filevec
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{
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DIR* dir;
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if (strcmp(path,".") != 0)
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{
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if ((dir = opendir(path)) == NULL)
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err_sys("invalid pathname or permission denied!");
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else
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chdir(path);
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}
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else
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{
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char* pwd = getcwd(path,MAXLINE);
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if (pwd == NULL)
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err_sys("fail to get current directory!");
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else
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{
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dir = opendir(path);
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chdir(path);
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}
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}
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struct dirent* item;
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struct stat statbuf;
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while ((item = readdir(dir)) != NULL)
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{
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lstat(item->d_name,&statbuf);
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if (S_ISDIR(statbuf.st_mode))
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{
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if (strcmp(".",item->d_name) == 0 ||
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strcmp("..",item->d_name) == 0)
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continue;
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else
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filevec.push_back(string(item->d_name));
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}
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else
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filevec.push_back(item->d_name);
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}
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}
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unsigned long getFileSize(const string& file) //获取某文件的大小（字节数）
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{
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unsigned long filesize;
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struct stat statbuff;
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lstat(file.c_str(),&statbuff);
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filesize = statbuff.st_size;
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return filesize;
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}
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void printLocalFile(const vector<string>& filevec) //输出当前路径下的文件名列表
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{
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int len = filevec.size();
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for (int i = 0;i != len; ++i)
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printf("%s\n",filevec[i].c_str());
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}
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void err_sys(const char* msg) //打印错误信息并终止程序
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{
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printf("%s\n",msg);
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exit(1);
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}

‎FTP.h

Lines changed: 21 additions & 0 deletions
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#ifndef _FTP_H
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#define _FTP_H
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#include <string>
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#include <vector>
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#define MAXLINE 50
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#define MAXSIZE 1000
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#define ServerCMDNUM 7
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extern const int cmdport; //服务器端的命令套接字端口
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extern const char rightmsg[10];
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extern const char wrongmsg[10];
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extern const char* ServerCMD[];
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void err_sys(const char*);
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unsigned long getFileSize(const std::string&);
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void setFileVec(std::vector<std::string>&,char* path);
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void printLocalFile(const std::vector<std::string>&);
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#endif

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