linux 实现ftp多客户端连接访问

在复习阶段，我又重新写了一个ftp服务程序。实现了多客户端同时连接、操作。

---

文件目录：
common.h
ftpserver.c
ftpclient.c

common.h
定义数据结构，以及常用函数

#ifndef COMMON_H
#define COMMON_H

#define SIZE_REQ 88

#define SIZE_RESP_DATA 1000
#define SIZE_RESP_INFO 36
#define SIZE_RESP 1036

#define PATH "./"

typedef struct RequestBody{
    char type;//4
    char s_arg[40];
    char s_arg2[40];
    int i_arg;//4
}RequestBody;

typedef struct ResponeBody{
    char type;//2 byte
    char status;//2 byte
    int datalen;//4 byte
    int datatotal;//4 byte
    char arg[24];//24 byte
    char data[SIZE_RESP_DATA];
}ResponeBody;

typedef enum RequestType{
    none, list, get, put, 
    login, regist, say, quit, clear, getData, putData
}RequestType;

char *RequestTypeKey[] = {"none", "list", "get", "put",
                        "login", "regist", "say", "quit", "clear", "getData", "putData"};

typedef struct ThreadArg{
    int i_arg;
    int i_arg2;
    char s_arg[50];
    char s_arg2[50];
}ThreadArg;

int my_write(int socket, void *data, int len){
    if(socket == 0 || data == NULL || len <= 0){
        return -1;
    }
    int i = 0;
    int len_t = 0;
    while(i < len){
        len_t = len-i > SIZE_RESP ? SIZE_RESP : len-i;
        i +=  write(socket, data+i, len_t);
    }
    return len;
}

void my_read(int socket, void *data, int len){
    int i = 0;
    int len_t = 0;
    while(i < len){
        len_t = len-i > SIZE_RESP ? SIZE_RESP : len-i;
        i += read(socket, data+i, len_t);
    }
}

#endif // COMMON_H

ftpserver.c
ftp服务器程序

/*************************************************************************
  > File Name: telser.c
# File Name: telser.c
# Author :pengjing
# QQ : 784915651
# Email:[email protected]
 ************************************************************************/

#include <stdio.h>
#include <sys/types.h>          /* See NOTES */
#include <sys/socket.h>
#include <pthread.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <string.h>
#include <stdlib.h>
#include <arpa/inet.h>
//IO multiplexing
#include <dirent.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
//select
#include <sys/select.h>
#include <sys/time.h>
#include <unistd.h>
//socket config
#include <sys/socket.h>
//sqlite3
#include <sqlite3.h>
//helper interface
#include "common.h"
#include "seqlist.h"

//socket init
int my_socket_listen(const char *ip, int port);
int my_socket_while_select(int listenfd);

//business handle
int business_rwaync_config();

//helper    
RequestType get_request_type(const char *type, char *status);

//business handle
int handle_op(int confd_t);
int handle_list(int socket);
void* handle_get(void *arg);
void* handle_put(void *arg);
int handle_login(int socket, const char *username, const char *userpwd);
int handle_regist(int socket, const char *username, const char *userpwd);
int handle_say(int socket, const char *data);

//define macro
#define DB_PATH "../ftpdb.db"

//define global var
fd_set set_rfd;//create file desc set
sqlite3 *db;//database
Seqlist *op_files = NULL;
pthread_mutex_t op_files_mutex;

int main(int argc, char *argv[])
{
    //user input ip,port
    /*
       if(argc != 3){
       printf("./tels <ip> <port>");
       return -1;
       }*/
    //open database
    int res = sqlite3_open(DB_PATH, &db);
    if(SQLITE_OK != res){
        printf("%s\n", sqlite3_errmsg(db));
        return -1;
    }

    //user config
    res = business_rwaync_config();
    if(res < 0){
        return -1;
    }
    //test
    //int ttt = handle_login("pengjing", "123456");
    /*int ttt = handle_regist(7, "test2", "test2");
      if(ttt == 0){
      printf("login success\n");
      }else{
      printf("login fail\n");
      }
      return 0;*/

    //socket listen
    int listenfd = my_socket_listen(NULL, 11223);
    if(listenfd < 0){
        return -1;
    }

    my_socket_while_select(listenfd);

    sqlite3_close(db); //close database
    return 0;
}

int my_socket_listen(const char *ip, int port){
    int listenfd = socket(AF_INET, SOCK_STREAM, 0);
    if(-1 == listenfd)
    {
        perror("server socket error");
        return -1;
    }

    int optval = 1;
    setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));    

    struct sockaddr_in addr;
    addr.sin_family = AF_INET;
    //addr.sin_port = htons(atoi(argv[2]));
    //addr.sin_addr.s_addr = inet_addr(argv[1]);
    addr.sin_port = htons(port);
    if(ip == NULL){
        addr.sin_addr.s_addr = INADDR_ANY;
    }else{
        addr.sin_addr.s_addr = inet_addr(ip);
    }

    int res = bind(listenfd, (struct sockaddr *)&addr, sizeof(addr));
    if(-1 == res)
    {
        perror("server bind error");
        return -1;
    }

    res = listen(listenfd, 100);
    if(-1 == res)
    {
        perror("server listen error");
        return -1;
    }
    printf("server init success\n");
    return listenfd;
}

int my_socket_while_select(int listenfd){
    //check client connect request
    struct sockaddr_in addr_con;
    int size_addr_con = sizeof(addr_con);
    memset(&addr_con, 0, size_addr_con);
    int confd = -1;
    int res = -1;
    fd_set set_rfd_t;
    FD_ZERO(&set_rfd);
    FD_SET(listenfd, &set_rfd);//add a listenfd to the collection
    int max_rfd = listenfd;//max file desc + 1
    struct timeval timeout;
    int fd = 0;
    while(1){
        //looping data reassign
        set_rfd_t = set_rfd;
        timeout.tv_sec = 2;
        timeout.tv_usec = 0;

        //loop check is file desc need op
        res = select(max_rfd+1, &set_rfd_t, NULL, NULL, &timeout);
        if(res < 0){
            perror("select error");
            break;
        }else if(0 == res){
            printf("timeout !\n");
            continue;
        }
        //need op
        int count = max_rfd;
        for(fd = 0; fd <= count; fd++){
            if(FD_ISSET(fd, &set_rfd_t) > 0){
                if(fd == listenfd){
                    //is listend socket
                    confd = accept(listenfd, (struct sockaddr *)&addr_con, &size_addr_con);
                    if(-1 == confd)
                    {
                        perror("client connect fail");
                        continue;
                    }
                    printf("IP %s connect\n", inet_ntoa(addr_con.sin_addr));
                    FD_SET(confd, &set_rfd);
                    if(confd > max_rfd) max_rfd = confd; 
                }else{
                    //is connect socket
                    res = handle_op(fd);
                    if(res < 0){
                        FD_CLR(fd, &set_rfd);
                        close(fd);
                    }
                }
            }
        }
    }
    close(listenfd);
    return 0;
}

int business_rwaync_config(){
    int res = -1;
    op_files = seqlist_create();
    if(NULL == op_files){
        printf("op_files create fail\n");
        return -1;
    }
    res = pthread_mutex_init(&op_files_mutex, NULL);
    if(res < 0){
        printf("op_files_mutex init fail\n");
        return -1;
    }
    return 0;   
}

int handle_op(int confd_t)
{
    RequestBody req;
    memset(&req, 0, SIZE_REQ);

    int res = -1;
    int num = read(confd_t, &req, SIZE_REQ);
    if(num < 0)
    {
        printf("read %d error\n", confd_t);
        return -2;
    }
    else if(num == 0)
    {
        printf("%d exit\n", confd_t);
        return -1;
    }

    printf("%d:%s\n", confd_t, RequestTypeKey[req.type]);
    //business handle
    switch(req.type)
    {
        case none:
            printf("%d:none\n", confd_t);
            break;
        case list:
            {
                handle_list(confd_t);
                break;
            }
        case get:
            {
                FD_CLR(confd_t, &set_rfd);
                pthread_t thr;
                pthread_detach(thr);
                ThreadArg *parg = (ThreadArg *)malloc(sizeof(ThreadArg));
                parg->i_arg = confd_t;
                strcpy(parg->s_arg, req.s_arg);
                pthread_create(&thr, NULL, handle_get, parg);
                break;
            }
        case put:
            {
                FD_CLR(confd_t, &set_rfd);
                pthread_t thr;
                pthread_detach(thr);
                ThreadArg *parg = (ThreadArg *)malloc(sizeof(ThreadArg));
                parg->i_arg = confd_t;
                parg->i_arg2 = req.i_arg;
                strcpy(parg->s_arg, req.s_arg);
                pthread_create(&thr, NULL, handle_put, parg);
                break;
            }
        case login:{
                       handle_login(confd_t, req.s_arg, req.s_arg2);
                       break;
                   }
        case regist:{
                        handle_regist(confd_t, req.s_arg, req.s_arg2);
                        break;
                    }
        case say:{
                     handle_say(confd_t, req.s_arg);
                     break;
                 }
        default:{
                    printf("%d request error\n", confd_t);
                    break;
                }
    }
    return 0;
}

int handle_list(int socket)
{
    ResponeBody resp;
    memset(&resp, 0, SIZE_RESP);

    //query the file name in the directory
    DIR *dir = opendir(PATH);
    if(NULL == dir)
    {
        return -1;
    }
    struct dirent* rent = NULL;
    while((rent = readdir(dir))!= NULL)
    {
        if(rent->d_name[0] == '.')
        {
            continue;
        }
        strcat(resp.data, rent->d_name);
        strcat(resp.data, "\n");
    }
    int len = strlen(resp.data);
    resp.data[len-1] = '\0';
    resp.datalen = len-1;
    closedir(dir);

    //send result
    resp.type = list;
    resp.status = 1;
    my_write(socket, &resp, SIZE_RESP);
    printf("list success\n");
    return 0;
}

bool condition_op_file(data_t* data, void *cmpvalue){
    if(strcmp(data->name, cmpvalue) == 0){
        return true;
    }
    return false;
}


void* handle_get(void *arg)
{
    printf("get ----\n");
    int res = -1;
    void * ret = NULL;
    ThreadArg* parg = (ThreadArg *)arg;
    int socket = parg->i_arg;
    if(socket <= 0){
        printf("get -> socket error\n");
        goto geterror;
    }
    ResponeBody resp;
    resp.type = getData;
    int len_get = 0,num=0;
    memset(&resp, 0, SIZE_RESP);

    //printf("%d:get\n", socket);

    if(strlen(parg->s_arg) <= 0){
        sprintf(resp.data, "please input filename");
        my_write(socket, &resp, SIZE_RESP);
        printf("get -> please input filename\n");
        goto geterror;
    }

    //set file is read status
    int index = -1;
    pthread_mutex_lock(&op_files_mutex);
    res = seqlist_find_bycondition(op_files, condition_op_file, parg->s_arg);
    if(res < 0){
        data_t data;
        strcpy(data.name, parg->s_arg);
        data.type = OP_READ;
        index = seqlist_get_length(op_files);
        seqlist_insert(op_files, index, data);
    }else{
        index = res;
        data_t data = op_files->data[res];
        if(data.type == OP_WRITE){//already write
            // can not read
            pthread_mutex_unlock(&op_files_mutex);
            printf("get -> curr have user operating, please try again later\n");

            resp.status = 0;
            strcpy(resp.data, "curr have user operating, please try again later");
            my_write(socket, &resp, SIZE_RESP);
            goto geterror;
        }
    }
    pthread_mutex_unlock(&op_files_mutex);

    char path[50] = {0};
    sprintf(path, "%s%s", PATH, parg->s_arg);
    struct stat stat_t;
    res = stat(path, &stat_t);
    if(res < 0){
        strcpy(resp.data, strerror(errno));
        my_write(socket, &resp, SIZE_RESP);
        printf("get -> stat error\n");
        goto geterror;
    }
    if(stat_t.st_size <= 0){
        sprintf(resp.data, "%s is empty", parg->s_arg);
        my_write(socket, &resp, SIZE_RESP);
        printf("get -> %s\n",resp.data);
        goto geterror;
    }
    int fd = open(path, O_RDWR);
    if(fd < 0)
    {
        strcpy(resp.data, strerror(errno));
        my_write(socket, &resp, SIZE_RESP);
        goto geterror;
    }
    resp.type = getData;
    resp.status = 1;
    resp.datatotal = stat_t.st_size;
    my_write(socket, &resp, SIZE_RESP);

    printf("get ++++ while\n");
    while((num = read(fd, resp.data, SIZE_RESP_DATA)) > 0)
    {
        resp.type = getData;
        resp.status = 1;
        resp.datalen = num;
        res = my_write(socket, &resp, SIZE_RESP);
        if(res < 0){
            printf("get ++++ res < 0\n");
            goto geterror;
        }
        memset(&resp, 0, SIZE_RESP);
        usleep(20);
    }
    close(fd);
geterror:
    pthread_mutex_lock(&op_files_mutex);
    op_files->data[res].type &= ~OP_READ;
    pthread_mutex_unlock(&op_files_mutex);
    FD_SET(parg->i_arg, &set_rfd);
    free(parg);
    printf("get ====\n");
    return ret;
}

void* handle_put(void *arg)
{
    void *ret = NULL;
    ThreadArg *parg = (ThreadArg *)arg;
    int socket = parg->i_arg;
    char *filename = parg->s_arg;
    int datatotal = parg->i_arg2;

    if(NULL == filename || 0 == *filename){
        ret = (void *)-1;
        printf("put -> filename error\n");
        goto puterror;
    }

    if(datatotal <= 0){
        ret = (void *)-1;
        printf("put -> datatotal <= 0\n");
        goto puterror;
    }
    ResponeBody resp;
    memset(&resp, 0, SIZE_RESP);
    resp.type = putData;

    //set file is write status
    int index = -1;
    pthread_mutex_lock(&op_files_mutex);
    int res = seqlist_find_bycondition(op_files, condition_op_file, filename);
    if(res < 0){
        data_t data;
        strcpy(data.name, filename);
        data.type = OP_WRITE;
        index = seqlist_get_length(op_files);
        seqlist_insert(op_files, index, data);
    }else{  
        index = res;
        data_t data = op_files->data[res];
        if(data.type != OP_NONE){
            pthread_mutex_unlock(&op_files_mutex);
            printf("put -> curr have user operating, please try again late\n");

            resp.status = 0;
            strcpy(resp.data, "curr have user operating, please try again later\n");
            my_write(socket, &resp, SIZE_RESP);
            ret = (void *)0;
            goto puterror;
        }
    }
    pthread_mutex_unlock(&op_files_mutex);

    char path[50] = {0};
    sprintf(path, "%s%s", PATH, filename);

    int fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0666);
    if(fd < 0){
        ret = (void *)-2;
        printf("put -> open error\n");
        resp.status = 0;
        strcpy(resp.data, "server put -> open file error\n");
        my_write(socket, &resp, SIZE_RESP);
        goto puterror;
    }

    resp.status = 1;
    strcpy(resp.data, "data start\n");
    my_write(socket, &resp, SIZE_RESP);

    int len_curr_resp = resp.datalen + SIZE_RESP_INFO;
    int num = 0;
    int len_recv = 0; 

    while(1){
        my_read(socket, (char *)&resp, SIZE_RESP);
        if(resp.type != putData || 0 == resp.status){
            printf("server put -> client resp config error\n");
            ret = (void *)-2;
            break;
        }
        write(fd, resp.data, resp.datalen);
        len_recv += resp.datalen;
        printf("server recv ----[%2.2f%%]----\n", len_recv/(double)datatotal * 100);
        memset(&resp, 0, SIZE_RESP);
        usleep(20);
        if(len_recv >= datatotal){
            printf("server recv success\n");
            ret = (void *)0;
            break;
        }
    }
    close(fd);
puterror:
    pthread_mutex_lock(&op_files_mutex);
    op_files->data[res].type &= ~OP_WRITE;
    pthread_mutex_unlock(&op_files_mutex);
    FD_SET(socket, &set_rfd);
    free(parg);
    return ret;
}

int handle_login(int socket, const char *username, const char *userpwd){
    ResponeBody resp;
    memset(&resp, 0, SIZE_RESP);
    resp.type = login;
    resp.status = 1;
    /*
       my_write(socket, &resp, SIZE_RESP);
       return 0;*/
    if(username == NULL || '\0' == *username){
        my_write(socket, &resp, SIZE_RESP);
        return -1;
    }
    if(userpwd == NULL || '\0' == *userpwd){
        my_write(socket, &resp, SIZE_RESP);
        return -1;
    }
    int ret = -1, res = -1;
    char sql[100] = {0};
    sprintf(sql, "select count(*) from ftp_user where status=1 and username='%s' and userpwd='%s'",username, userpwd);
    char **result;
    int nrow=0, ncolumn=0;
    char *errmsg = NULL;
    res = sqlite3_get_table(db, sql, &result, &nrow, &ncolumn, &errmsg);
    if(0 == res){
        int count = atoi(*(result+ncolumn*1+0));
        printf("count:%d\n", count);
        if(count > 0){
            resp.status = 1;
            strcpy(resp.data, "login success");
            res = my_write(socket, &resp, SIZE_RESP);
            ret = 0;
        }else{
            resp.status = 0;
            strcpy(resp.data, "username or userpwd error");
            res = my_write(socket, &resp, SIZE_RESP);
            ret = 0;
        }
    }else{
        printf("errmsg:%s\n", errmsg);
        strcpy(resp.data, errmsg);
        my_write(socket, &resp, SIZE_RESP);
    }
    sqlite3_free_table(result);
    return ret;
}

int handle_regist(int socket, const char *username, const char *userpwd){
    ResponeBody resp;
    memset(&resp, 0, SIZE_RESP);
    resp.type = regist;
    resp.status = 0;
    if(username == NULL || '\0' == *username){
        my_write(socket, &resp, SIZE_RESP);
        return -1;
    }
    if(userpwd == NULL || '\0' == *userpwd){
        my_write(socket, &resp, SIZE_RESP);
        return -1;
    }
    int res = -1;
    //query username is exist
    char sql[100] = {0};
    sprintf(sql, "select count(username) from ftp_user where username='%s'",username);
    char **result;
    int nrow=0, ncolumn=0;
    char *errmsg = NULL;
    res = sqlite3_get_table(db, sql, &result, &nrow, &ncolumn, &errmsg);
    if(0 == res){
        int count = atoi(*(result+ncolumn*1+0));
        if(count > 0){
            strcpy(resp.data, "username is exist");
            res = my_write(socket, &resp, SIZE_RESP);
            return 0;
        }
    }else{
        printf("errmsg:%s\n", errmsg);
        strcpy(resp.data, errmsg);
        my_write(socket, &resp, SIZE_RESP);
        return 0;
    }
    //insert record
    sprintf(sql, "insert into ftp_user(username, userpwd) values('%s','%s')",username, userpwd);
    res = sqlite3_exec(db, sql, NULL, NULL, &errmsg);
    if(0 == res){
        resp.status = 1;
        strcpy(resp.data, "regist success");
        res = my_write(socket, &resp, SIZE_RESP);
    }else{
        printf("errmsg:%s\n", errmsg);
        strcpy(resp.data, errmsg);
        my_write(socket, &resp, SIZE_RESP);
    }
    return 0;
}

int handle_say(int socket, const char *data){
    printf("%d say: %s\n", socket, data);
    return 0;
}

ftpclient.c
ftp客户端程序

/*************************************************************************
  > File Name: telc.c
# File Name: telc.c
# Author :彭敬
# QQ : 784915651
# Email:[email protected]
# Blog：http://blog.csdn.net/returningprodigal
# Created Time: 2017年12月06日 星期三 17时00分22秒
 ************************************************************************/

#include <stdio.h>
#include <signal.h>
#include <sys/types.h>          /* See NOTES */
#include <sys/socket.h>
#include <pthread.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <string.h>
#include <pthread.h>
#include <stdlib.h>

#include "common.h"
//file op
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>

//socket config
#include <sys/types.h>
#include <sys/socket.h>

//socket init
int my_socket_init(const char *ip, int port);
void sig_handle_sigusr1(int arg1);

//helper
int my_get_request(const char *str_req, char *type, char arg[40]);

//business handle
int handle_list(int socket);
int handle_get(int socket, const char *filename);
int handle_put(int socket, const char *filename);

int main(int argc, char *argv[])
{
    /*
    printf("req %d\n", sizeof(RequestBody));
    printf("resp %d\n", sizeof(ResponeBody));
    return 0;
    */

    //recv user arg
    /*
       if(argc != 3){
       printf("./ftpc <ip> <port>");
       return -1;
       }*/
    //other config
    signal(SIGUSR1, sig_handle_sigusr1);

    //create socket
    int confd = my_socket_init("127.0.0.1", 11223);
    if(confd < 0)
    {
        perror("socket init error");
        return -1;
    }
    printf("weclome to parkin ftp\n");

    //user login
    //my_login(confd);

    //send user op
    printf("****please input your op****\n");
    char buff[100];
    int num = -1, res = -1;
    char arg[40] = {0};
    char type = none;
    while(1)
    {
        memset(buff, 0, 100);
        num = read(0, buff, 100);
        if(num <= 0){
            continue;
        }
        res = my_get_request(buff, &type, arg);
        if(res < 0){
            printf("request error\n");
        }
        else if(get == type){
            handle_get(confd, arg);
        }
        else if(put == type){
            handle_put(confd, arg);
        }
        else if(list == type){
            handle_list(confd);
        }
        else if(quit == type){
            exit(0);
        }
        else if(clear == type){
            system("clear");
        }
    }
    close(confd);
}

int my_socket_init(const char *ip, int port){
    int confd = socket(AF_INET, SOCK_STREAM, 0);
    if(-1 == confd)
    {
        perror("client socket error");
        return -1;
    }
    struct sockaddr_in addr;
    addr.sin_family = AF_INET;
    //addr.sin_port = htons(atoi(argv[2]));
    //addr.sin_addr.s_addr = inet_addr(argv[1]);
    //addr.sin_port = htons(atoi("11223"));
    //addr.sin_addr.s_addr = inet_addr("127.0.0.1");
    addr.sin_port = htons(port);
    addr.sin_addr.s_addr = inet_addr(ip);
    int res = connect(confd, (struct sockaddr *)&addr, sizeof(addr));
    if(res < 0){
        perror("connect fail\n");
        return -1;
    }
    return confd;
}

int my_login(int socket){
    int ret = -1;
    RequestBody req;
    memset(&req, 0, SIZE_REQ);
    ResponeBody resp;
    memset(&resp, 0, SIZE_RESP);
    while(1){
        //auth user login
        printf("-----------------------------\n");
        printf("--1.login  2.regist  3.quit--\n");
        printf("-----------------------------\n");
        char op = 0;
        //setbuf(stdin, NULL);
        scanf("%c",&op);
        while(( getchar())!='\n');//clear stdio '\n' cache
        switch(op){
            case '1':{
                         req.type = login;
                         printf("please input user name:");
                         scanf("%s", req.s_arg);
                         printf("please input user pwd:");
                         scanf("%s", req.s_arg2);
                         my_write(socket, &req, SIZE_REQ);
                         my_read(socket, (char *)&resp, SIZE_RESP);
                         if(login == resp.type && 1 == resp.status){
                             printf("login success\n");
                             return 0;
                         }
                         printf("login fail:%s\n", resp.data);
                         break;
                     }
            case '2':{
                         req.type = regist;
                         char userpwd_re[40] = {0};
                         printf("please input user name:");
                         scanf("%s", req.s_arg);
                         printf("please input user pwd:");
                         scanf("%s", req.s_arg2);
                         printf("please re-input user pwd:");
                         scanf("%s", userpwd_re);
                         if(strcmp(req.s_arg2, userpwd_re) == 0){
                             my_write(socket, &req, SIZE_REQ);
                             my_read(socket, (char *)&resp, SIZE_RESP);
                             if(regist == resp.type && 1 == resp.status){
                                 printf("regist success\n");
                                 continue;
                             }else{
                                 printf("regist fail:%s\n", resp.data);
                             }
                         }else{
                             printf("password is different twice\n");
                         }
                         break;
                     }
            case '3':{
                         exit(0);
                     }
            default:{
                        printf("input error\n");
                        break;
                    }
        }
        memset(&req, 0, SIZE_REQ);
        memset(&resp, 0, SIZE_RESP);
        printf("please wait 3 sec...\n");
        sleep(3);
        system("clear");
    }
    return ret;
}

void sig_handle_sigusr1(int arg1){
    //printf("sigusr\n");
}

int my_get_request(const char *str_req, char *type, char arg[40])
{
    if(NULL == str_req || 0 == *str_req)
    {
        return -1;
    }
    char seg[] = " ";
    char charlist[2][50] = {0};
    int i = 0;
    char *substr = strtok((char *)str_req, seg);
    while (substr != NULL)
    {
        strcpy(charlist[i],substr);
        i++;
        substr = strtok(NULL,seg);
    }
    if(i<= 0 || i > 2)
    {
        return -1;
    }
    //\n replace \0
    int len_1 = strlen(charlist[0]);
    if(len_1 > 0 && '\n' == charlist[0][len_1-1])
    {
        charlist[0][len_1-1] = '\0';
    }
    int len_2 = strlen(charlist[1]);
    if(len_2 > 0 && '\n' == charlist[1][len_2-1])
    {
        charlist[1][len_2-1] = '\0';
    }

    if(strcmp(charlist[0], "get") == 0)
    {
        *type = get;
    }
    else if(strcmp(charlist[0], "put") == 0)
    {
        *type = put;
    }
    else if(strcmp(charlist[0], "list") == 0)
    {
        *type = list;
    }
    else if(strcmp(charlist[0], "quit") == 0)
    {
        *type = quit;
    }
    else if(strcmp(charlist[0], "clear") == 0)
    {
        *type = clear;
    }
    else if(strcmp(charlist[0], "say") == 0)
    {
        *type = say;
    }
    else{
        *type = none;
    }
    strcpy(arg, charlist[1]);
    return 0;
}

int handle_list(int socket){
    if(socket == 0){
        printf("list socket is empty\n");
        return 0;
    }
    RequestBody req;
    memset(&req, 0, SIZE_REQ);
    req.type = list;
    my_write(socket, &req, SIZE_REQ);

    ResponeBody resp;
    memset(&resp, 0, SIZE_RESP);
    my_read(socket, (char *)&resp, SIZE_RESP);
    printf("%s\n", resp.data);
    return 0;
}

int handle_get(int socket,const char *filename)
{
    if(NULL == filename || 0 == *filename){
        printf("get -> filename error");
        return -1;
    }

    char path[50] = {0};
    sprintf(path, "%s%s", PATH, filename);

    int fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0666);
    if(fd < 0){
        perror("open error");
        return -1;
    }
    RequestBody req;
    memset(&req, 0, SIZE_REQ);
    req.type = get;
    strcpy(req.s_arg, filename);
    my_write(socket, &req, SIZE_REQ);

    ResponeBody resp;
    memset(&resp, 0, SIZE_RESP);
    int datatotal = 0;
    my_read(socket, (char *)&resp, SIZE_RESP);
    if(getData == resp.type){
        if(1 == resp.status){
            datatotal = resp.datatotal;
        }else{
            printf("getData -> %s\n", resp.data);
        }
    }
    memset(&resp, 0, SIZE_RESP);

    int num = 0,len_recv = 0;
    //read data
    int ret = -1;
    while(1){
        my_read(socket, (char *)&resp, SIZE_RESP);
        if(0 == resp.status || resp.type != getData){
            printf("getData -> resp config error\n");
            ret = -2;
            break;
        }
        write(fd, resp.data, resp.datalen);
        len_recv += resp.datalen;
        printf("get ----[%2.2f%%]----\n", len_recv/(double)datatotal * 100);
        memset(&resp, 0, SIZE_RESP);
        if(len_recv >= datatotal){
            printf("get success\n");
            ret = 0;
            break;
        }
    }
    close(fd);
    //kill(getpid(), SIGUSR1);
    return ret;
}

int handle_put(int socket, const char *filename)
{   
    int len_get = 0,num=0,res=-1;

    char path[50] = {0};
    sprintf(path, "%s%s", PATH, filename);
    struct stat stat_t;
    res = stat(path, &stat_t);
    if(res < 0){
        perror("stat error");
        return -2;
    }
    if(stat_t.st_size <= 0){
        printf("%s is empty\n", filename);
        return -2;
    }
    int fd = open(path, O_RDWR);
    if(fd < 0)
    {
        perror("open error");
        return -2;
    }

    RequestBody req;
    memset(&req, 0, SIZE_REQ);
    req.type = put;
    strcpy(req.s_arg, filename);
    req.i_arg = stat_t.st_size; 
    res = my_write(socket, &req, SIZE_REQ); 

    ResponeBody resp;
    memset(&resp, 0, SIZE_RESP);
    my_read(socket, (char *)&resp, SIZE_RESP);
    if(resp.type == putData){
        if(0 == resp.status){
            printf("putData -> %s\n", resp.data);
            goto puterror;
        }
    }

    while((num = read(fd, resp.data, SIZE_RESP_DATA)) > 0)
    {
        if(num <= 0){
            perror("read error");
            return -1;
        }
        resp.type = putData;
        resp.status = 1;
        resp.datalen = num;
        res = my_write(socket, &resp, SIZE_RESP);
        if(res < 0){
            return -1;
        }
        memset(&resp, 0, SIZE_RESP);
        //usleep(100);
    }
puterror:
    close(fd);
    return 0;
}