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本文小編為大家詳細(xì)介紹“C++如何實(shí)現(xiàn)簡單FTP客戶端軟件開發(fā)”，內(nèi)容詳細(xì)，步驟清晰，細(xì)節(jié)處理妥當(dāng)，希望這篇“C++如何實(shí)現(xiàn)簡單FTP客戶端軟件開發(fā)”文章能幫助大家解決疑惑，下面跟著小編的思路慢慢深入，一起來學(xué)習(xí)新知識(shí)吧。
簡單FTP客戶端軟件開發(fā)（100分）網(wǎng)絡(luò)環(huán)境中的一項(xiàng)基本應(yīng)用就是將文件從一臺(tái)計(jì)算機(jī)中復(fù)制到另一臺(tái)可能相距很遠(yuǎn)的計(jì)算機(jī)中。而文件傳送協(xié)議FTP是因特網(wǎng)上使用得最廣泛的文件傳送協(xié)議。FTP使用客戶服務(wù)器方式。
1）以命令行形式運(yùn)行
2）該FTP客戶端程序具有以下基本功能：能完成FTP鏈接的打開和關(guān)閉操作；能執(zhí)行文件的上傳和下載；能完成目錄的創(chuàng)建、刪除等有關(guān)操作。
3)設(shè)計(jì)中加入新的功能：登錄，進(jìn)入上級(jí)或下級(jí)目錄
要求可以傳輸簡單的文本文件。
1、分為兩個(gè)端口，指令交流端口，數(shù)據(jù)交換端口
2、指令端口連接后一直保持通信，直到獲得退出信號(hào)
3、數(shù)據(jù)交換端口在獲得相關(guān)指令后重新建立連接
1、分別創(chuàng)建兩個(gè)C++項(xiàng)目
2、進(jìn)入即可
3、若兩個(gè)都在本地，使用本地回環(huán)測試IP，127.0.0.1
4、登錄的部分在客戶端中被注釋掉了沒有開啟
Tips:
目前登錄以及help部分仍有兩個(gè)小bug，系由端口的命令斷開以及連接部分引起，交由讀者自己研究，若不想管可以不使用這兩個(gè)功能
服務(wù)端——>Server
#include "Winsock2.h"
#include "windows.h"
#include <iostream>
#include <string>
using namespace std;
#define RECV_PORT 3312 //接收端口
#define SEND_PORT 4302 //發(fā)送端口
#define DATA_PORT 3313 //數(shù)據(jù)發(fā)送端口
#pragma comment(lib, "wsock32.lib")
SOCKET sockClient, sockServer;
SOCKET dataClient, dataServer;
sockaddr_in dataAddr;
sockaddr_in severAddr;//服務(wù)器地址
sockaddr_in ClientAddr;//客戶端地址
sockaddr_in dataClientAddr;//數(shù)據(jù)地址
int addrLen; //地址長度
char fileName[20]; //文件名
char order[20]; //命令
char rbuff[1024]; //接收緩沖區(qū)
char sbuff[1024]; //發(fā)送緩沖區(qū)
char namePassword[1024] = "user 123456"; //用戶名和密碼
//***************函數(shù)聲明***************
DWORD startSock();
DWORD createSocket();
int sendFileRecord(SOCKET datatcps, WIN32_FIND_DATA *pfd);
int sendFileList(SOCKET datatcps);
int sendFile(SOCKET datatcps, FILE* file);
DWORD connectProcess();
//***************函數(shù)聲明***************
DWORD startSock() {//初始化winsock
WSADATA WSAData;
if (WSAStartup(MAKEWORD(2, 2), &WSAData) != 0) {
cout << "初始化失敗" << endl;
return -1;
}
return 1;
}
DWORD createSocket() {
sockClient = socket(AF_INET, SOCK_STREAM, 0);
dataClient = socket(AF_INET, SOCK_STREAM, 0);
if (sockClient == SOCKET_ERROR||dataClient == SOCKET_ERROR) {
cout << "創(chuàng)建失敗" << endl;
WSACleanup();
return -1;
}
dataAddr.sin_family = AF_INET;
severAddr.sin_family = AF_INET;
dataAddr.sin_addr.s_addr = htonl(INADDR_ANY);//監(jiān)聽任意地址
dataAddr.sin_port = htons(DATA_PORT);
severAddr.sin_addr.s_addr = htonl(INADDR_ANY);//監(jiān)聽任意地址
//cout<<htonl(INADDR_ANY)<<endl;
severAddr.sin_port = htons(RECV_PORT);
if (bind(sockClient, (struct sockaddr FAR*)&severAddr, sizeof(severAddr)) == SOCKET_ERROR||bind(dataClient, (struct sockaddr FAR*)&dataAddr, sizeof(dataAddr)) == SOCKET_ERROR) {
//bind函數(shù)用于將socket和地址結(jié)構(gòu)綁定==
cout << "綁定失敗" << endl;
return -1;
}
return 1;
}
DWORD mkdir(char fileName[]){
char path[1000];
GetCurrentDirectory(sizeof(path), path);//找到當(dāng)前進(jìn)程的當(dāng)前目錄
strcat(path,"\\");
strcat(path,fileName);
cout<<path<<endl;
bool flag = CreateDirectory(path,NULL);
if (flag)
cout<<"創(chuàng)建文件："<<fileName<<"成功"<<endl;
else
cout<<"創(chuàng)建文件："<<fileName<<"失敗"<<endl;
}
DWORD delFile(char fileName[]){
char path[1000];
GetCurrentDirectory(sizeof(path), path);//找到當(dāng)前進(jìn)程的當(dāng)前目錄
strcat(path,"\\");
strcat(path,fileName);
// cout<<path<<endl;
bool flag = RemoveDirectory(path);
if (flag)
cout<<"刪除文件："<<fileName<<"成功"<<endl;
else
cout<<"刪除文件："<<fileName<<"失敗"<<endl;
}
DWORD connectProcess() {
addrLen = sizeof(ClientAddr);//addrLen是對(duì)象地址的長度
if (listen(sockClient, 10) < 0|| listen(dataClient, 10)<0) {//讓套接字進(jìn)入被動(dòng)監(jiān)聽狀態(tài)，參數(shù)2為請(qǐng)求隊(duì)列的最大長度
cout << "監(jiān)聽失敗" << endl;
return -1;
}
cout << "服務(wù)器正在監(jiān)聽中…" << endl;
while (1) {
//accept取出隊(duì)列頭部的連接請(qǐng)求
//sockclient是處于監(jiān)聽的套接字
//ClientAddr 是監(jiān)聽的對(duì)象地址
sockServer = accept(sockClient, (struct sockaddr FAR*)&ClientAddr, &addrLen);
while (1) {
memset(rbuff, 0, sizeof(rbuff));
memset(sbuff, 0, sizeof(sbuff));
if (recv(sockServer, rbuff, sizeof(rbuff), 0) <= 0) {
continue;
}
cout << endl << "獲取并執(zhí)行的命令：" << rbuff << endl;
if (strncmp(rbuff, "get", 3) == 0) {//將文件發(fā)給客戶端
strcpy(fileName, rbuff + 4);
FILE* file;//定義一個(gè)文件訪問指針
//處理下載文件請(qǐng)求
file = fopen(fileName, "rb");//二進(jìn)制打開文件，只允許讀
if (file) {
sprintf(sbuff, "get %s", fileName);
if (!send(sockServer, sbuff, sizeof(sbuff), 0)) {
cout<<"發(fā)送失敗"<<endl;
fclose(file);
return 0;
}
else {//創(chuàng)建額外數(shù)據(jù)連接傳送數(shù)據(jù)
if (!sendFile(dataClient, file)) {
return 0;
}
fclose(file);
}
}else {
strcpy(sbuff, "無法打開文件\n");
cout<<"無法打開文件"<<endl;
if (!send(sockServer, sbuff, sizeof(sbuff), 0)) {
return 0;
}
}
}//get
else if (strncmp(rbuff, "put", 3) == 0) {//從客戶端上傳上來文件
cout<<"debug1"<<endl;
FILE* fd;
int cnt;
strcpy(fileName, rbuff + 4);
fd = fopen(fileName, "wb");
if (fd == NULL) {
cout << "無法打開文件" << fileName << endl;
return 0;
}
sprintf(sbuff, "put %s", fileName);
if (!send(sockServer, sbuff, sizeof(sbuff), 0)) {
fclose(fd);
return 0;
}
memset(sbuff, '\0', sizeof(rbuff));
int dataAddLen = sizeof (dataClientAddr);
dataServer = accept(dataClient, (struct sockaddr FAR*)&dataClientAddr, &dataAddLen);
while ((cnt = recv(dataServer, rbuff, sizeof(rbuff), 0)) > 0) {
fwrite(rbuff, sizeof(char), cnt, fd);//把cnt個(gè)數(shù)據(jù)長度為char的數(shù)據(jù)從rbuff輸入到fd指向的文件
}
cout << "成功獲得文件" << fileName << endl;
closesocket(dataServer);
fclose(fd);
}//put
else if (strncmp(rbuff, "pwd", 3) == 0) {
char path[1000];
GetCurrentDirectory(sizeof(path), path);//找到當(dāng)前進(jìn)程的當(dāng)前目錄
strcpy(sbuff, path);
send(sockServer, sbuff, sizeof(sbuff), 0);
}//pwd
else if (strncmp(rbuff, "ls", 2) == 0) {
strcpy(sbuff, rbuff);
send(sockServer, sbuff, sizeof(sbuff), 0);
sendFileList(dataClient);
}//dir
else if(strncmp(rbuff, "mkdir", 5)==0){
strcpy(fileName, rbuff + 6);
strcpy(sbuff,rbuff);
send(sockServer, sbuff, sizeof (sbuff),0);//發(fā)送回信息
mkdir(fileName);
}//mkdir
else if(strncmp(rbuff,"del", 3)==0){
strcpy(fileName, rbuff + 4);//獲得要?jiǎng)h的文件名
strcpy(sbuff,rbuff);
send(sockServer, sbuff, sizeof (sbuff),0);//發(fā)送回信息
delFile(fileName);
}//del
else if (strncmp(rbuff, "cd", 2) == 0) {
strcpy(fileName, rbuff + 3);
strcpy(sbuff, rbuff);
send(sockServer, sbuff, sizeof(sbuff), 0);
char path[1000];
GetCurrentDirectory(sizeof(path), path);//找到當(dāng)前進(jìn)程的當(dāng)前目錄
strcat(path,"\\");
strcat(path,fileName);
SetCurrentDirectory(path);//設(shè)置當(dāng)前目錄
}//cd
else if (strncmp(rbuff, "user", 4) == 0) {
char tbuff[1024];
strcpy(tbuff, rbuff + 5);
strcat(tbuff, " ");
memset(rbuff, '\0', sizeof(rbuff));
strcpy(sbuff, "成功獲取用戶名\0");
send(sockServer, sbuff, sizeof(sbuff), 0);
recv(sockServer, rbuff, sizeof(rbuff), 0);
cout << endl << "獲取并執(zhí)行的命令：" << rbuff << endl;
strcat(tbuff, rbuff + 5);
if (strcmp(tbuff, namePassword) == 0) {//驗(yàn)證是否正確并返回?cái)?shù)據(jù)給客戶端
send(sockServer, "right\0", sizeof(sbuff), 0);
}else {
send(sockServer, "wrong\0", sizeof(sbuff), 0);
}
}//user pass
}
closesocket(sockServer);
}
}
int sendFile(SOCKET datatcps, FILE* file) {
int dataAddLen = sizeof (dataClientAddr);
dataServer = accept(datatcps, (struct sockaddr FAR*)&dataClientAddr, &dataAddLen);
cout << "正在發(fā)送文件…" << endl;
memset(sbuff, '\0', sizeof(sbuff));
while(1) {//從文件中循環(huán)讀取數(shù)據(jù)并發(fā)送至客戶端
int len = fread(sbuff, 1, sizeof(sbuff), file);//把file指針指向的文件中的內(nèi)容讀取到sbuff中
//cout<<"sbuff內(nèi)容："<<sbuff<<endl;
if (send(dataServer, sbuff, len, 0) == SOCKET_ERROR) {
cout << "連接失敗" << endl;
closesocket(dataServer);
return 0;
}
if (len < sizeof(sbuff)) {//文件傳送結(jié)束
break;
}
}
closesocket(dataServer);
cout << "發(fā)送成功" << endl;
return 1;
}
int sendFileList(SOCKET datatcps) {
int dataAddLen = sizeof (dataClientAddr);
dataServer = accept(datatcps, (struct sockaddr FAR*)&dataClientAddr, &dataAddLen);
HANDLE hff; //建立一個(gè)線程
WIN32_FIND_DATA fd; //搜索文件
hff = FindFirstFile("*", &fd); //查找文件來把待操作文件的相關(guān)屬性讀取到WIN32_FIND_DATA結(jié)構(gòu)中去
if (hff == INVALID_HANDLE_VALUE) { //發(fā)生錯(cuò)誤
const char *errStr = "列出文件列表時(shí)發(fā)生錯(cuò)誤\n";
cout << *errStr << endl;
if (send(dataServer, errStr, strlen(errStr), 0) == SOCKET_ERROR) {
cout << "發(fā)送失敗" << endl;
}
closesocket(dataServer);
return 0;
}
BOOL flag = TRUE;
while (flag) {//發(fā)送文件信息
if (!sendFileRecord(dataServer, &fd)) {
closesocket(dataServer);
return 0;
}
flag = FindNextFile(hff, &fd);//查找下一個(gè)文件
}
closesocket(dataServer);
return 1;
}
int sendFileRecord(SOCKET datatcps, WIN32_FIND_DATA *pfd) {//發(fā)送當(dāng)前的文件記錄
char fileRecord[MAX_PATH + 32];
FILETIME ft; //文件的建立時(shí)間
FileTimeToLocalFileTime(&pfd -> ftLastWriteTime, &ft);//Converts a file time to a local file time.
SYSTEMTIME lastWriteTime;
FileTimeToSystemTime(&ft, &lastWriteTime);
const char *dir = pfd -> dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? "<DIR>" : " ";
sprintf(fileRecord, "%04d-%02d-%02d %02d:%02d %5s %10d %-20s\n",
lastWriteTime.wYear,
lastWriteTime.wMonth,
lastWriteTime.wDay,
lastWriteTime.wHour,
lastWriteTime.wMinute,
dir,
pfd -> nFileSizeLow,
pfd -> cFileName
);
if (send(datatcps, fileRecord, strlen(fileRecord), 0) == SOCKET_ERROR) {
//通過datatcps接口發(fā)送fileRecord數(shù)據(jù)，成功返回發(fā)送的字節(jié)數(shù)
cout << "發(fā)送失敗" << endl;
return 0;
}
return 1;
}
int main(){
if (startSock() == -1 || createSocket() == -1 || connectProcess() == -1) {
return -1;
}
return 1;
}客戶端——>Client
#include <Winsock.h>
#include <windows.h>
#include <time.h>
#include <stdio.h>
#include <iostream>
using namespace std;
#define RECV_PORT 3312 //接收端口
#define SEND_PORT 4302 //發(fā)送端口
#define DATA_PORT 3313 //數(shù)據(jù)接受端口
#pragma comment(lib, "wsock32.lib") //加載ws2_32.dll，它是Windows Sockets應(yīng)用程序接口， 用于支持Internet和網(wǎng)絡(luò)應(yīng)用程序。
SOCKET sockClient; //客戶端對(duì)象
sockaddr_in serverAddr; //服務(wù)器地址
sockaddr_in dataAddr;
SOCKET dataClient; //數(shù)據(jù)對(duì)象
char inputIP[20]; //存儲(chǔ)輸入的服務(wù)器IP
char fileName[20]; //文件名
char rbuff[1024]; //接收緩沖區(qū)
char sbuff[1024]; //發(fā)送緩沖區(qū)
bool checkFlag = false; //標(biāo)志是否通過登陸
//***********************函數(shù)聲明***********************
DWORD startSock(); //啟動(dòng)winsock并初始化
DWORD createSocket(SOCKET &mySocket); //創(chuàng)建socket
DWORD callServer(SOCKET &mySocket,sockaddr_in addr); //發(fā)送連接請(qǐng)求
int command(); //執(zhí)行命令
void help(); //菜單
void list(SOCKET &sockfd); //列出遠(yuǎn)方當(dāng)前目錄
DWORD sendTCP(char data[]); //發(fā)送要執(zhí)行的命令至服務(wù)端
int user(); //上傳用戶名
int pass(); //上傳密碼
int sendFile(SOCKET &datatcps, FILE* file); //put 傳送給遠(yuǎn)方一個(gè)文件
//***********************函數(shù)聲明***********************
//***********************函數(shù)定義***********************
DWORD startSock() { //啟動(dòng)winsock并初始化
WSADATA WSAData;
char a[20];
memset(a, 0, sizeof(a));
if (WSAStartup(MAKEWORD(2, 2), &WSAData) != 0) { //加載winsock版本
cout << "sock初始化失敗" << endl;
return -1;
}
if (strncmp(inputIP, a, sizeof(a)) == 0) {
cout << "請(qǐng)輸入要連接的服務(wù)器IP：";
cin >> inputIP;
}
//設(shè)置地址結(jié)構(gòu)
serverAddr.sin_family = AF_INET; //表明底層是使用的哪種通信協(xié)議來遞交數(shù)據(jù)的，AF_INET表示使用 TCP/IPv4 地址族進(jìn)行通信
serverAddr.sin_addr.s_addr = inet_addr(inputIP); //指定服務(wù)器IP，十進(jìn)制轉(zhuǎn)化成二進(jìn)制IPV4地址
serverAddr.sin_port = htons(RECV_PORT); //設(shè)置端口號(hào)，htons用于將主機(jī)字節(jié)序改為網(wǎng)絡(luò)字節(jié)序
dataAddr.sin_family = AF_INET;
dataAddr.sin_addr.s_addr = inet_addr(inputIP);
dataAddr.sin_port = htons(DATA_PORT);//數(shù)據(jù)端口和控制端口不一樣
return 1;
}
DWORD createSocket(SOCKET &mySocket) { //創(chuàng)建socket
//要使用套接字，首先必須調(diào)用socket()函數(shù)創(chuàng)建一個(gè)套接字描述符，就如同操作文件時(shí)，首先得調(diào)用fopen()函數(shù)打開一個(gè)文件。
mySocket = socket(AF_INET, SOCK_STREAM, 0);//當(dāng)scoket函數(shù)成功調(diào)用時(shí)返回一個(gè)新的SOCKET(Socket Descriptor) //SOCK_STREAM（流式套接字）:Tcp連接，提供序列化的、可靠的、雙向連接的字節(jié)流。支持帶外數(shù)據(jù)傳輸
if (mySocket == SOCKET_ERROR) {
cout << "創(chuàng)建socket失敗" << endl;
WSACleanup();//終止Ws2_32.dll 的使用
return -1;
}
return 1;
}
DWORD callServer(SOCKET &mySocket,sockaddr_in addr) { //發(fā)送連接請(qǐng)求
createSocket(mySocket);
if (connect(mySocket, (struct sockaddr*)&addr, sizeof(addr)) == SOCKET_ERROR) {//connect()創(chuàng)建與指定外部端口的連接
cout << "連接失敗" << endl;
memset(inputIP, 0, sizeof(inputIP));
return -1;
}
return 1;
}
void help() { //幫助菜單
cout << " ___________________________________________ " << endl
<< " | FTP幫助菜單 | " << endl
<< " | 1、get 下載文件 [輸入格式: get 文件名 ] | " << endl
<< " | 2、put 上傳文件 [輸入格式：put 文件名] | " << endl
<< " | 3、pwd 顯示當(dāng)前文件夾的絕對(duì)路徑 | " << endl
<< " | 4、ls 顯示遠(yuǎn)方當(dāng)前目錄的文件 | " << endl
<< " | 5、mkdir 新建文件夾 [輸入格式：mkdir 文件名] | " << endl
<< " | 6、del 刪除文件夾 [輸入格式：del 文件名] | " << endl
<< " | 7、cd 改變遠(yuǎn)方當(dāng)前目錄和路徑 | " << endl
<< " | 進(jìn)入下級(jí)目錄: cd 路徑名 | " << endl
<< " | 進(jìn)入上級(jí)目錄: c .. | " << endl
<< " | 8、? 或者 help 進(jìn)入幫助菜單 | " << endl
<< " | 9、quit 退出FTP | " << endl
<< " |___________________________________________| " << endl;
}
DWORD sendTCP(char data[]) { //發(fā)送要執(zhí)行的命令至服務(wù)端
int length = send(sockClient, data, strlen(data), 0);
if (length <= 0) {
cout << "發(fā)送命令至服務(wù)端失敗" << endl;
closesocket(sockClient);//當(dāng)不使用socket()創(chuàng)建的套接字時(shí)，應(yīng)該調(diào)用closesocket()函數(shù)將它關(guān)閉，就如同調(diào)用fclose()函數(shù)關(guān)閉一個(gè)文件，用來進(jìn)行套接字資源的釋放。
WSACleanup();
return -1;
}
return 1;
}
int sendFile(SOCKET &datatcps, FILE* file) { //put 傳送給遠(yuǎn)方一個(gè)文件
callServer(datatcps,dataAddr);
cout << "正在傳輸文件…" << endl;
memset(sbuff, '\0', sizeof(sbuff));
while (1) { //從文件中循環(huán)讀取數(shù)據(jù)并發(fā)送
int len = fread(sbuff, 1, sizeof(sbuff), file); //fread從file文件讀取sizeof(sbuff)長度的數(shù)據(jù)到sbuff，返回成功讀取的數(shù)據(jù)個(gè)數(shù)
if (send(datatcps, sbuff, sizeof(rbuff), 0) == SOCKET_ERROR) {
cout << "與客戶端的連接中斷" << endl;
closesocket(datatcps);
return 0;
}
if (len < sizeof(sbuff)) {
break;
}
}
closesocket(datatcps);
cout << "傳輸完成" << endl;
return 1;
}
void list(SOCKET &sockfd) { //列出遠(yuǎn)方當(dāng)前目錄
callServer(sockfd,dataAddr);
int nRead;
memset(sbuff, '\0', sizeof(sbuff));
while (1) {
nRead = recv(sockfd, rbuff, sizeof(rbuff), 0);
//recv通過sockClient套接口接受數(shù)據(jù)存入rbuff緩沖區(qū)，返回接收到的字節(jié)數(shù)
if (nRead == SOCKET_ERROR) {
cout << "讀取時(shí)發(fā)生錯(cuò)誤" << endl;
exit(1);
}
if (nRead == 0) { //數(shù)據(jù)讀取結(jié)束
break;
}
cout<<"nRead長度"<<nRead<<endl;
//顯示數(shù)據(jù)
rbuff[nRead] = '\0';
cout << rbuff << endl;
}
cout<<"讀取結(jié)束"<<endl;
closesocket(sockfd);
}
int user() {
char operation[10], name[20]; //操作與文件名
char order[30] = "\0"; //輸入的命令
char buff[80]; //用來存儲(chǔ)經(jīng)過字符串格式化的order
cout << "請(qǐng)輸入用戶名指令（user 用戶名）：";
strcpy(operation,"user");
cin >> name;
strcat(order, operation), strcat(order, " "), strcat(order, name);
sprintf(buff, order);
sendTCP(buff); //發(fā)送指令
recv(sockClient, rbuff, sizeof(rbuff), 0); //接收信息
cout << rbuff << endl;
return 1;
}
int pass() {
char operation[10], name[20]; //操作與文件名
char order[30] = "\0"; //輸入的命令
char buff[80]; //用來存儲(chǔ)經(jīng)過字符串格式化的order
cout << "請(qǐng)輸入密碼指令（pass 密碼）：" ;
strcpy(operation,"pass");
cin >> name;
strcat(order, operation), strcat(order, " "), strcat(order, name);
sprintf(buff, order);
sendTCP(buff); //發(fā)送指令
recv(sockClient, rbuff, sizeof(rbuff), 0); //接收信息
cout << rbuff << endl;
if (strcmp(rbuff, "wrong") == 0) {
return 0;
}
return 1;
}
//***********************函數(shù)定義***********************
int command(){
char operation[10], name[20]; //操作與文件名
char order[30] = "\0"; //輸入的命令
char buff[80]; //用來存儲(chǔ)經(jīng)過字符串格式化的order
FILE *fd1, *fd2; //File協(xié)議主要用于訪問本地計(jì)算機(jī)中的文件，fd指針指向要訪問的目標(biāo)文件
int cnt;
//發(fā)送連接請(qǐng)求成功，初始化數(shù)據(jù)
memset(operation, 0, sizeof(operation));
memset(name, 0, sizeof(name));
memset(order, 0, sizeof(order));
memset(buff, 0, sizeof(buff));
memset(rbuff, 0, sizeof(rbuff));
memset(sbuff, 0, sizeof(sbuff));
cout << endl << "請(qǐng)輸入要執(zhí)行的指令: ";
cin >> operation;
// cout<<"why:"<<operation<<endl;
if (strncmp(operation, "get", 3) == 0 || strncmp(operation, "put", 3) == 0 ||
strncmp(operation, "cd", 2) == 0 || strncmp(operation, "mkdir", 5) == 0 || strncmp(operation, "del", 3) ==0){ ///需要輸入文件名的功能
cin >> name;
} else if (strncmp(operation, "quit", 4) == 0) { ///退出功能
cout << "感謝您的使用" << endl;
return 1;
} else if (strncmp(operation, "?", 1) == 0 || strncmp(operation, "help", 4) == 0) { ///幫助菜單功能
help();
}else if(strncmp(operation,"ls",2)==0|| strncmp(operation,"pwd",3)==0){
}
else{
cout<<"非法輸入"<<endl;
return 0;
}
//將指令整合進(jìn)order，并存放進(jìn)buff
strcat(order, operation), strcat(order, " "), strcat(order, name);
sprintf(buff, order);
sendTCP(buff); //發(fā)送指令
recv(sockClient, rbuff, sizeof(rbuff), 0); //接收信息
cout << rbuff << endl; //pwd功能在這里已經(jīng)實(shí)現(xiàn)
if (strncmp(rbuff, "get", 3) == 0) { ///下載功能
callServer(dataClient,dataAddr);
fd1 = fopen(name, "wb"); //用二進(jìn)制的方式打開文件，wb表示打開或新建一個(gè)二進(jìn)制文件（只允許寫數(shù)據(jù)）
if (fd1 == NULL) {
cout << "打開或者新建 " << name << "文件失敗" << endl;
return 1;
}
memset(rbuff, '\0', sizeof(rbuff));
while ((cnt = recv(dataClient, rbuff, sizeof(rbuff), 0)) > 0) {
// cout<<"緩沖區(qū)"<<rbuff<<endl<<"長度"<<cnt<<endl;
fwrite(rbuff, sizeof(rbuff), 1, fd1); //C 庫函數(shù) size_t fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream) 把 ptr 所指向的數(shù)組中的數(shù)據(jù)寫入到給定流 stream 中。
}
closesocket(dataClient);
fclose(fd1); //關(guān)閉文件
}//get
else if (strncmp(rbuff, "put", 3) == 0) { ///上傳功能
// cout<<"執(zhí)行"<<endl;
strcpy(fileName, rbuff + 4);
fd2 = fopen(fileName, "rb"); //打開一個(gè)二進(jìn)制文件，文件必須存在，只允許讀
if (fd2) { //成功打開
// cout<<"debug0"<<endl;
if (!sendFile(dataClient, fd2)) {
cout << "發(fā)送失敗" << endl;
return 1;
}
fclose(fd2);
} else {
strcpy(sbuff, "無法打開文件\n");
if (!send(sockClient, sbuff, sizeof(sbuff), 0)) {
return 1;
}
}
}//put
else if (strncmp(rbuff, "ls", 2) == 0) { ///ls功能
list(dataClient);
}//dir
return 0;
}
int main() {
while (1) {
startSock(); //啟動(dòng)winsock并初始化
if (callServer(sockClient,serverAddr) == -1) { //發(fā)送連接請(qǐng)求失敗
continue;
}
cout << "發(fā)送連接請(qǐng)求成功" << endl;
// if (checkFlag == false) {//登陸
// if (user() && pass()) {
// checkFlag = true;
// }
// continue;
// }
checkFlag = true;
if(checkFlag){
help();
}
while(checkFlag){
if(command()){
break;
}
}
cout<<"命令輸入結(jié)束"<<endl;
closesocket(sockClient); //關(guān)閉連接
WSACleanup(); //釋放Winsock
return 0;
}
}
/*
192.168.0.100
user gyc
pass 123456
pwd
cd Debug
get 110.txt
*/讀到這里，這篇“C++如何實(shí)現(xiàn)簡單FTP客戶端軟件開發(fā)”文章已經(jīng)介紹完畢，想要掌握這篇文章的知識(shí)點(diǎn)還需要大家自己動(dòng)手實(shí)踐使用過才能領(lǐng)會(huì)，如果想了解更多相關(guān)內(nèi)容的文章，歡迎關(guān)注億速云行業(yè)資訊頻道。
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