CentOS服务器无桌面HTML快照方案优化技术求助

我使用CentOS服务器，需要添加网页快照功能，要求无需显示桌面或窗口，且功能需常驻运行以减少每次程序初始化的耗时。

方案一：system()调用wkhtmltoimage #

• 优点：操作简单
• 缺点：速度过慢，每次生成图片都需通过system函数调用，实现不够优雅

方案二：libwebkit2gtk + 隐藏GTK窗口 #

该方案效果理想，但依赖GTK，仅能在GNOME桌面环境运行，无法通过SSH连接的终端执行，仍非最优解。实现代码如下：

void web_view_snapshot_callback(GObject* source_object, GAsyncResult* res, gpointer user_data) {
    printf("%s:In\n", __func__);
    
    cairo_surface_t* surface = webkit_web_view_get_snapshot_finish((WebKitWebView*)source_object, res, NULL);
    if (surface) {
        int width = cairo_image_surface_get_width(surface);
        int height = cairo_image_surface_get_height(surface);

        GdkPixbuf* pixbuf = gdk_pixbuf_get_from_surface(surface, 0, 0, width, height);
        if (pixbuf) {
            if (gdk_pixbuf_save(pixbuf, "screenshot.png", "png", NULL, NULL)) {
                printf("%s:Save Success\n", __func__);
            }
            else {
                printf("%s:gdk_pixbuf_save Failed\n", __func__);
            }
            g_object_unref(pixbuf);
            pixbuf = NULL;
        }
        else {
            printf("%s:gdk_pixbuf_get_from_surface Failed\n", __func__);
        }
        cairo_surface_destroy(surface);
        surface = NULL;
    }
    else {
        printf("%s:webkit_web_view_get_snapshot_finish Failed\n", __func__);
    }

    gtk_main_quit();
}

void web_view_snapshot(WebKitWebView* web_view) {
    printf("%s:In\n", __func__);
    webkit_web_view_get_snapshot(web_view, WEBKIT_SNAPSHOT_REGION_FULL_DOCUMENT, WEBKIT_SNAPSHOT_OPTIONS_NONE, NULL, web_view_snapshot_callback, NULL);
}

void web_view_on_changed(WebKitWebView* web_view, WebKitLoadEvent load_event, gpointer user_data) {
    switch (load_event) {
    case WEBKIT_LOAD_FINISHED: {
        printf("%s:WEBKIT_LOAD_FINISHED\n", __func__);

        web_view_snapshot(web_view);
        break;
    }
    default:
        printf("%s:%d\n", __func__, load_event);
        break;
    }
}

void window_destory(GtkWidget* widget, GtkWidget* window) {
    gtk_main_quit();
}

int main(int argc, char* argv[]) {

    gtk_init(&argc, &argv);
    printf("gtk_init\n");

    WebKitWebView* web_view = WEBKIT_WEB_VIEW(webkit_web_view_new());
    GtkWidget* window = gtk_window_new(GTK_WINDOW_TOPLEVEL);

    gtk_window_set_default_size(GTK_WINDOW(window), 1400, 0);

    gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(web_view));

    g_signal_connect(window, "destroy", G_CALLBACK(window_destory), NULL);

    g_signal_connect(web_view, "load-changed", G_CALLBACK(web_view_on_changed), NULL);

    gtk_widget_show_all(window);
    gtk_widget_hide(window);

    gchar localfile_realpath[512] = { 0 };
    gchar html_localpath[512] = { 0 };

    realpath("./local.html", localfile_realpath);

    sprintf(html_localpath, "file://%s", localfile_realpath);
    printf("html_localpath:%s\n", html_localpath);

    webkit_web_view_load_uri(WEBKIT_WEB_VIEW(web_view), html_localpath);

    g_object_unref(web_view);

    gtk_main();

    return 0;
}

后续思路与求助 #

已知libwebkit2gtk是WebKit的移植版本，我考虑自行实现WebKit端口来完成网页快照，但不确定该思路是否可行，同时担心开发耗时过长，希望得到相关技术建议。

内容的提问来源于stack exchange，提问作者xxpp123zz