我需要的是从Linux系统中能够使用的c语言进行编码
时间: 2024-03-10 20:43:30 浏览: 12
好的,以下是一个使用C语言和libwebsockets库实现的简单聊天室的示例代码:
服务端代码(server.c):
```c
#include <stdio.h>
#include <string.h>
#include <libwebsockets.h>
#define MAX_CLIENTS 10
#define BUFFER_SIZE 4096
static struct lws *clients[MAX_CLIENTS] = {NULL};
static int callback_chat(struct lws *wsi, enum lws_callback_reasons reason, void *user, void *in, size_t len)
{
switch (reason) {
case LWS_CALLBACK_ESTABLISHED:
// 连接建立,将客户端加入clients数组
for (int i = 0; i < MAX_CLIENTS; i++) {
if (clients[i] == NULL) {
clients[i] = wsi;
break;
}
}
break;
case LWS_CALLBACK_RECEIVE:
// 接收到客户端发来的消息,将消息转发给所有客户端
char buffer[BUFFER_SIZE];
snprintf(buffer, BUFFER_SIZE, "%s", (char *)in);
for (int i = 0; i < MAX_CLIENTS; i++) {
if (clients[i] != NULL && clients[i] != wsi) {
lws_write(clients[i], (unsigned char *)buffer, strlen(buffer), LWS_WRITE_TEXT);
}
}
break;
case LWS_CALLBACK_CLOSED:
// 连接关闭,将客户端从clients数组中删除
for (int i = 0; i < MAX_CLIENTS; i++) {
if (clients[i] == wsi) {
clients[i] = NULL;
break;
}
}
break;
default:
break;
}
return 0;
}
static struct lws_protocols protocols[] = {
{ "chat", callback_chat, 0, BUFFER_SIZE },
{ NULL, NULL, 0, 0 }
};
int main(int argc, char **argv)
{
struct lws_context_creation_info info;
memset(&info, 0, sizeof(info));
info.port = 8080;
info.protocols = protocols;
info.gid = -1;
info.uid = -1;
struct lws_context *context = lws_create_context(&info);
if (context == NULL) {
fprintf(stderr, "Error: Failed to create libwebsocket context\n");
return -1;
}
while (1) {
lws_service(context, 50);
}
lws_context_destroy(context);
return 0;
}
```
客户端代码(client.c):
```c
#include <stdio.h>
#include <string.h>
#include <libwebsockets.h>
#define BUFFER_SIZE 4096
static struct lws *wsi_client = NULL;
static int callback_chat(struct lws *wsi, enum lws_callback_reasons reason, void *user, void *in, size_t len)
{
switch (reason) {
case LWS_CALLBACK_CLIENT_ESTABLISHED:
// 连接建立,记录wsi_client
wsi_client = wsi;
break;
case LWS_CALLBACK_CLIENT_RECEIVE:
// 接收到服务端发来的消息,输出到控制台
printf("[Client] Message received: %s\n", (char *)in);
break;
case LWS_CALLBACK_CLIENT_CLOSED:
// 连接关闭,设置wsi_client为NULL
wsi_client = NULL;
break;
default:
break;
}
return 0;
}
static struct lws_protocols protocols[] = {
{ "chat", callback_chat, 0, BUFFER_SIZE },
{ NULL, NULL, 0, 0 }
};
int main(int argc, char **argv)
{
struct lws_context_creation_info info;
memset(&info, 0, sizeof(info));
info.port = CONTEXT_PORT_NO_LISTEN;
info.protocols = protocols;
info.gid = -1;
info.uid = -1;
struct lws_context *context = lws_create_context(&info);
if (context == NULL) {
fprintf(stderr, "Error: Failed to create libwebsocket context\n");
return -1;
}
struct lws_client_connect_info connect_info;
memset(&connect_info, 0, sizeof(connect_info));
connect_info.context = context;
connect_info.address = "localhost";
connect_info.port = 8080;
connect_info.path = "/";
connect_info.host = lws_canonical_hostname(context);
connect_info.origin = connect_info.host;
connect_info.protocol = protocols[0].name;
struct lws *wsi = lws_client_connect_via_info(&connect_info);
if (wsi == NULL) {
fprintf(stderr, "Error: Failed to connect to server\n");
lws_context_destroy(context);
return -1;
}
while (wsi_client == NULL) {
lws_service(context, 50);
}
char buffer[BUFFER_SIZE];
while (fgets(buffer, BUFFER_SIZE, stdin)) {
if (wsi_client == NULL) {
break;
}
buffer[strlen(buffer) - 1] = '\0';
lws_write(wsi_client, (unsigned char *)buffer, strlen(buffer), LWS_WRITE_TEXT);
}
lws_context_destroy(context);
return 0;
}
```
运行服务端代码后,在另一个终端中运行客户端代码,即可进行多人聊天。