基於TCP流協議的socket網絡文件傳輸Demo

基於TCP流協議的socket網絡文件傳輸Demo：

實現：C語言
功能：文件傳輸（可以傳任何格式的文件）

/*************************************************************************
    > File Name: Server.c
    > Author: SongLee
    > E-mail: [email protected]
    > Created Time: 2014年03月13日 星期四 22時17分43秒
    > Personal Blog: http://songlee24.github.io/
 ************************************************************************/

#include<netinet/in.h>  // sockaddr_in
#include<sys/types.h>   // socket
#include<sys/socket.h>  // socket
#include<stdio.h>       // printf
#include<stdlib.h>      // exit
#include<string.h>      // bzero

#define SERVER_PORT 8000
#define LENGTH_OF_LISTEN_QUEUE 20
#define BUFFER_SIZE 1024
#define FILE_NAME_MAX_SIZE 512

int main(void)
{
    // 聲明並初始化一個服務器端的socket地址結構
    struct sockaddr_in server_addr;
    bzero(&server_addr, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = htons(INADDR_ANY);
    server_addr.sin_port = htons(SERVER_PORT);

    // 創建socket，若成功，返回socket描述符
    int server_socket_fd = socket(PF_INET, SOCK_STREAM, 0);
    if(server_socket_fd < 0)
    {
        perror("Create Socket Failed:");
        exit(1);
    }
    int opt = 1;
    setsockopt(server_socket_fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));

    // 綁定socket和socket地址結構
    if(-1 == (bind(server_socket_fd, (struct sockaddr*)&server_addr, sizeof(server_addr))))
    {
        perror("Server Bind Failed:");
        exit(1);
    }

    // socket監聽
    if(-1 == (listen(server_socket_fd, LENGTH_OF_LISTEN_QUEUE)))
    {
        perror("Server Listen Failed:");
        exit(1);
    }

    while(1)
    {
        // 定義客戶端的socket地址結構
        struct sockaddr_in client_addr;
        socklen_t client_addr_length = sizeof(client_addr);

        // 接受連接請求，返回一個新的socket(描述符)，這個新socket用於同連接的客戶端通信
        // accept函數會把連接到的客戶端信息寫到client_addr中
        int new_server_socket_fd = accept(server_socket_fd, (struct sockaddr*)&client_addr, &client_addr_length);
        if(new_server_socket_fd < 0)
        {
            perror("Server Accept Failed:");
            break;
        }

        // recv函數接收數據到緩衝區buffer中
        char buffer[BUFFER_SIZE];
        bzero(buffer, BUFFER_SIZE);
        if(recv(new_server_socket_fd, buffer, BUFFER_SIZE, 0) < 0)
        {
            perror("Server Recieve Data Failed:");
            break;
        }

        // 然後從buffer(緩衝區)拷貝到file_name中
        char file_name[FILE_NAME_MAX_SIZE+1];
        bzero(file_name, FILE_NAME_MAX_SIZE+1);
        strncpy(file_name, buffer, strlen(buffer)>FILE_NAME_MAX_SIZE?FILE_NAME_MAX_SIZE:strlen(buffer));
        printf("%s\n", file_name);

        // 打開文件並讀取文件數據
        FILE *fp = fopen(file_name, "r");
        if(NULL == fp)
        {
            printf("File:%s Not Found\n", file_name);
        }
        else
        {
            bzero(buffer, BUFFER_SIZE);
            int length = 0;
            // 每讀取一段數據，便將其發送給客戶端，循環直到文件讀完爲止
            while((length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)
            {
                if(send(new_server_socket_fd, buffer, length, 0) < 0)
                {
                    printf("Send File:%s Failed./n", file_name);
                    break;
                }
                bzero(buffer, BUFFER_SIZE);
            }

            // 關閉文件
            fclose(fp);
            printf("File:%s Transfer Successful!\n", file_name);
        }
        // 關閉與客戶端的連接
        close(new_server_socket_fd);
    }
    // 關閉監聽用的socket
    close(server_socket_fd);
    return 0;
}

/*************************************************************************
    > File Name: Client.c
    > Author: SongLee
    > E-mail: [email protected]
    > Created Time: 2014年03月14日 星期五 09時41分46秒
    > Personal Blog: http://songlee24.github.io/
 ************************************************************************/

#include<netinet/in.h>   // sockaddr_in
#include<sys/types.h>    // socket
#include<sys/socket.h>   // socket
#include<stdio.h>        // printf
#include<stdlib.h>       // exit
#include<string.h>       // bzero

#define SERVER_PORT 8000
#define BUFFER_SIZE 1024
#define FILE_NAME_MAX_SIZE 512

int main()
{
    // 聲明並初始化一個客戶端的socket地址結構
    struct sockaddr_in client_addr;
    bzero(&client_addr, sizeof(client_addr));
    client_addr.sin_family = AF_INET;
    client_addr.sin_addr.s_addr = htons(INADDR_ANY);
    client_addr.sin_port = htons(0);

    // 創建socket，若成功，返回socket描述符
    int client_socket_fd = socket(AF_INET, SOCK_STREAM, 0);
    if(client_socket_fd < 0)
    {
        perror("Create Socket Failed:");
        exit(1);
    }

    // 綁定客戶端的socket和客戶端的socket地址結構 非必需
    if(-1 == (bind(client_socket_fd, (struct sockaddr*)&client_addr, sizeof(client_addr))))
    {
        perror("Client Bind Failed:");
        exit(1);
    }

    // 聲明一個服務器端的socket地址結構，並用服務器那邊的IP地址及端口對其進行初始化，用於後面的連接
    struct sockaddr_in server_addr;
    bzero(&server_addr, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    if(inet_pton(AF_INET, "127.0.0.1", &server_addr.sin_addr) == 0)
    {
        perror("Server IP Address Error:");
        exit(1);
    }
    server_addr.sin_port = htons(SERVER_PORT);
    socklen_t server_addr_length = sizeof(server_addr);

    // 向服務器發起連接，連接成功後client_socket_fd代表了客戶端和服務器的一個socket連接
    if(connect(client_socket_fd, (struct sockaddr*)&server_addr, server_addr_length) < 0)
    {
        perror("Can Not Connect To Server IP:");
        exit(0);
    }

    // 輸入文件名 並放到緩衝區buffer中等待發送
    char file_name[FILE_NAME_MAX_SIZE+1];
    bzero(file_name, FILE_NAME_MAX_SIZE+1);
    printf("Please Input File Name On Server:\t");
    scanf("%s", file_name);

    char buffer[BUFFER_SIZE];
    bzero(buffer, BUFFER_SIZE);
    strncpy(buffer, file_name, strlen(file_name)>BUFFER_SIZE?BUFFER_SIZE:strlen(file_name));

    // 向服務器發送buffer中的數據
    if(send(client_socket_fd, buffer, BUFFER_SIZE, 0) < 0)
    {
        perror("Send File Name Failed:");
        exit(1);
    }

    // 打開文件，準備寫入
    FILE *fp = fopen(file_name, "w");
    if(NULL == fp)
    {
        printf("File:\t%s Can Not Open To Write\n", file_name);
        exit(1);
    }

    // 從服務器接收數據到buffer中
    // 每接收一段數據，便將其寫入文件中，循環直到文件接收完並寫完爲止
    bzero(buffer, BUFFER_SIZE);
    int length = 0;
    while((length = recv(client_socket_fd, buffer, BUFFER_SIZE, 0)) > 0)
    {
        if(fwrite(buffer, sizeof(char), length, fp) < length)
        {
            printf("File:\t%s Write Failed\n", file_name);
            break;
        }
        bzero(buffer, BUFFER_SIZE);
    }

    // 接收成功後，關閉文件，關閉socket
    printf("Receive File:\t%s From Server IP Successful!\n", file_name);
    close(fp);
    close(client_socket_fd);
    return 0;
}

個人站點：http://songlee24.github.io/