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如何在c語言中實(shí)現(xiàn)websocket群聊功能

小樊
98
2024-08-23 04:32:36
欄目: 編程語言

要在C語言中實(shí)現(xiàn)WebSocket群聊功能,可以使用開源的WebSocket庫來幫助實(shí)現(xiàn)。以下是一個(gè)簡單的示例代碼來演示如何在C語言中創(chuàng)建一個(gè)WebSocket服務(wù)器并實(shí)現(xiàn)群聊功能:

#include <stdio.h>
#include <string.h>
#include <libwebsockets.h>

#define MAX_CLIENTS 10

struct per_session_data {
    struct lws *wsi;
};

static struct lws_protocols protocols[] = {
    {
        .name = "chat-protocol",
        .callback = callback_chat,
        .per_session_data_size = sizeof(struct per_session_data)
    },
    { NULL, NULL, 0, 0 }
};

static int callback_chat(struct lws *wsi, enum lws_callback_reasons reason, void *user, void *in, size_t len)
{
    struct per_session_data *pss = (struct per_session_data *) user;

    switch (reason) {
        case LWS_CALLBACK_ESTABLISHED:
            pss->wsi = wsi;
            break;

        case LWS_CALLBACK_RECEIVE:
            // Broadcast message to all connected clients
            broadcast_message((const char *) in, len);
            break;

        default:
            break;
    }

    return 0;
}

void broadcast_message(const char *message, size_t len)
{
    struct lws *wsi;
    
    for (int i = 0; i < MAX_CLIENTS; i++) {
        wsi = lws_client_wsi_table[i];
        if (wsi != NULL) {
            lws_write(wsi, (unsigned char *) message, len, LWS_WRITE_TEXT);
        }
    }
}

int main()
{
    struct lws_context *context;
    struct lws_context_creation_info info;

    memset(&info, 0, sizeof info);
    info.port = 8080;
    info.protocols = protocols;

    context = lws_create_context(&info);

    while (1) {
        lws_service(context, 50);
    }

    lws_context_destroy(context);

    return 0;
}

在上面的示例代碼中,我們定義了一個(gè)callback_chat回調(diào)函數(shù)來處理WebSocket連接的各種事件,包括連接建立和消息接收。我們還定義了一個(gè)broadcast_message函數(shù)來將接收到的消息廣播給所有連接的客戶端。

請注意,這只是一個(gè)簡單的示例代碼,實(shí)際應(yīng)用中可能需要更多的功能和錯(cuò)誤處理。您可以根據(jù)自己的需求對代碼進(jìn)行修改和擴(kuò)展。

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