Linux网络编程:socket文件传输范例
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转自http://blog.csdn.net/lisonglisonglisong/article/details/22699675
基于TCP流协议的socket网络文件传输Demo:
实现:C语言
功能:文件传输(可以传任何格式的文件)
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- #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
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- #define SERVER_PORT 8000
- #define LENGTH_OF_LISTEN_QUEUE 20
- #define BUFFER_SIZE 1024
- #define FILE_NAME_MAX_SIZE 512
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- int main(void)
- {
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- 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); //任意IP地址
- server_addr.sin_port = htons(SERVER_PORT);
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- 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));
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- if(-1 == (bind(server_socket_fd, (struct sockaddr*)&server_addr, sizeof(server_addr))))
- {
- perror("Server Bind Failed:");
- exit(1);
- }
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- if(-1 == (listen(server_socket_fd, LENGTH_OF_LISTEN_QUEUE))) //LENGTH_OF_LISTEN_QUEUE
- //参考http://blog.csdn.net/wm_1991/article/details/52176287
- {
- perror("Server Listen Failed:");
- exit(1);
- }
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- while(1)
- {
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- struct sockaddr_in client_addr;
- socklen_t client_addr_length = sizeof(client_addr);
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- 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;
- }
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- char buffer[BUFFER_SIZE];
- bzero(buffer, BUFFER_SIZE);
- if(recv(new_server_socket_fd, buffer, BUFFER_SIZE, 0) < 0) //BUFFER_SIZE=1024
- {
- perror("Server Recieve Data Failed:");
- break;
- }
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- 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);
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- 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;
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- 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);
- }
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- fclose(fp);
- printf("File:%s Transfer Successful!\n", file_name);
- }
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- close(new_server_socket_fd);
- }
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- close(server_socket_fd);
- return 0;
- }
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- #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
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- #define SERVER_PORT 8000
- #define BUFFER_SIZE 1024
- #define FILE_NAME_MAX_SIZE 512
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- int main()
- {
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- 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);
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- int client_socket_fd = socket(AF_INET, SOCK_STREAM, 0);
- if(client_socket_fd < 0)
- {
- perror("Create Socket Failed:");
- exit(1);
- }
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- if(-1 == (bind(client_socket_fd, (struct sockaddr*)&client_addr, sizeof(client_addr))))
- {
- perror("Client Bind Failed:");
- exit(1);
- }
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- struct sockaddr_in server_addr;
- bzero(&server_addr, sizeof(server_addr));
- server_addr.sin_family = AF_INET;
//inet_pton:将“点分十进制” -> “二进制整数”
//int inet_pton(int af, const char *src, void *dst);
//这个函数转换字符串到网络地址,第一个参数af是地址簇,第二个参数*src是来源地址,第三个参数* dst接收转换后//的数据。
- 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);
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- if(connect(client_socket_fd, (struct sockaddr*)&server_addr, server_addr_length) < 0)
- {
- perror("Can Not Connect To Server IP:");
- exit(0);
- }
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- 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);
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- char buffer[BUFFER_SIZE];
- bzero(buffer, BUFFER_SIZE);
- strncpy(buffer, file_name, strlen(file_name)>BUFFER_SIZE?BUFFER_SIZE:strlen(file_name));
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- if(send(client_socket_fd, buffer, BUFFER_SIZE, 0) < 0)
- {
- perror("Send File Name Failed:");
- exit(1);
- }
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- FILE *fp = fopen(file_name, "w");
- if(NULL == fp)
- {
- printf("File:\t%s Can Not Open To Write\n", file_name);
- exit(1);
- }
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- 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);
- }
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- printf("Receive File:\t%s From Server IP Successful!\n", file_name);
- close(fp);
- close(client_socket_fd);
- return 0;
- }