cloudflare worker router

app_demo.js

// Routes
const ROUTES = {
    // 'GET /api/posts': 'getPosts',
    // 'GET /api/posts/:id': 'getPost',
    // 'GET /api/posts/:id/comments': 'getComments',
    // 'GET /api/categories': 'getCategories',
    // 'GET /api/tags': 'getTags',
    // 'GET /api/configs': 'getConfigs',
    // 'GET /api/admin/posts': 'getAdminPosts',
    // 'POST /api/admin/posts': 'createPost',
    // 'PUT /api/admin/posts/:id': 'updatePost',
    // 'DELETE /api/admin/posts/:id': 'deletePost',
    // 'GET /api/admin/categories': 'getAdminCategories',
    // 'POST /api/admin/categories': 'createCategory',
    // 'PUT /api/admin/categories/:id': 'updateCategory',
    // 'DELETE /api/admin/categories/:id': 'deleteCategory',
    // 'GET /api/admin/tags': 'getAdminTags',
    // 'POST /api/admin/tags': 'createTag',
    // 'PUT /api/admin/tags/:id': 'updateTag',
    // 'DELETE /api/admin/tags/:id': 'deleteTag',
    // 'GET /api/admin/configs': 'getAdminConfigs',
    // 'POST /api/admin/configs': 'createConfig',
    // 'PUT /api/admin/configs/:id': 'updateConfig',
    // 'DELETE /api/admin/configs/:id': 'deleteConfig',
    // 'GET /api/admin/comments': 'getAdminComments',
    // 'POST /api/admin/comments': 'createComment',
    // 'DELETE /api/admin/comments/:id': 'deleteComment',

    'GET /api/hello': 'hello',
    'GET /api/echo/:text/:text2': 'echo',
};

let handlers = {}

// handle routes
async function handleRoute(request) {
    const { pathname, search } = new URL(request.url);
    const method = request.method;
    let response = null;

    Object.keys(ROUTES).forEach((route) => {
        let [routeMethod, routePath] = route.split(' ');
        let routeRegex = new RegExp(`^${routePath.replace(/:\w+/g, '(\\w+)')}$`);
        let routeMatch = pathname.match(routeRegex);

        if (method === routeMethod && routeMatch) {
            let handler = ROUTES[route];
            let params = {};
            let routeParts = routePath.split('/');

            for (let i = 0; i < routeParts.length; i++) {
                if (routeParts[i].startsWith(':')) {
                    console.log(i)
                    params[routeParts[i].slice(1)] = routeMatch[i-2];
                }
            }

            request.query = getSearchParams(search);
            response = handlers[handler](request, params);
            return;
        }
    });

    if (response) {
        return response;
    }

    // Route not found
    return new Response('Resource not found', { status: 404, 'Content-Type': 'text/plain' })
}

function getSearchParams(search) {
  const searchParams = new URLSearchParams(search);
  const map = new Map();
  for (const [key, value] of searchParams) {
    if (!map.has(key)) {
      map.set(key, []);
    }
    map.get(key).push(value);
  }
  return map;
}

// handlers
handlers.hello = async (request, params) => {
    return new Response('Hello World!', { status: 200, 'Content-Type': 'text/plain' })
};

handlers.echo = async (request, params) => {
    return new Response(params.text + "-" + params.text2, { status: 200, 'Content-Type': 'text/plain' })
};

// main
export default {
    async fetch(request, env) {
      try {
        request.env = env
        return handleRoute(request)
      } catch(e) {
        return new Response(e.stack, { status: 500 })
      }
    }
  }