From 168093e034e0213faeac3198356b4fc2cc8ac48a Mon Sep 17 00:00:00 2001
From: uh_wot <uhwot@protonmail.com>
Date: Sun, 24 Jan 2021 15:41:29 +0100
Subject: [PATCH] initial commit

---
 .gitignore    |   4 ++
 .prettierrc   |   6 +++
 README.md     |  25 +++++++++++
 index.js      |  30 +++++++++++++
 package.json  |  18 ++++++++
 router.js     | 121 ++++++++++++++++++++++++++++++++++++++++++++++++++
 wrangler.toml |   6 +++
 7 files changed, 210 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 .prettierrc
 create mode 100644 README.md
 create mode 100644 index.js
 create mode 100644 package.json
 create mode 100644 router.js
 create mode 100644 wrangler.toml

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..635bd4d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+node_modules/
+worker/
+.cargo-ok
+package-lock.json
diff --git a/.prettierrc b/.prettierrc
new file mode 100644
index 0000000..ef58ff9
--- /dev/null
+++ b/.prettierrc
@@ -0,0 +1,6 @@
+{
+  "trailingComma": "es5",
+  "tabWidth": 4,
+  "semi": false,
+  "singleQuote": true
+}
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..cfb35b1
--- /dev/null
+++ b/README.md
@@ -0,0 +1,25 @@
+## Router
+
+Selects the logic to respond to requests based on the `request` method and URL. Can be used with REST APIs or apps that require basic routing logic.
+
+[`index.js`](https://github.com/cloudflare/worker-template-router/blob/master/index.js) is the content of the Workers script.
+
+#### Wrangler
+
+You can use [wrangler](https://github.com/cloudflare/wrangler) to generate a new Cloudflare Workers project based on this template by running the following command from your terminal:
+
+```
+wrangler generate myapp https://github.com/cloudflare/worker-template-router
+```
+
+Before publishing your code you need to edit `wrangler.toml` file and add your Cloudflare `account_id` - more information about publishing your code can be found [in the documentation](https://workers.cloudflare.com/docs/quickstart/configuring-and-publishing/).
+
+Once you are ready, you can publish your code by running the following command:
+
+```
+wrangler publish
+```
+
+#### Serverless
+
+To deploy using serverless add a [`serverless.yml`](https://serverless.com/framework/docs/providers/cloudflare/) file.
diff --git a/index.js b/index.js
new file mode 100644
index 0000000..2cdca8e
--- /dev/null
+++ b/index.js
@@ -0,0 +1,30 @@
+const Router = require('./router')
+
+/**
+ * Example of how router can be used in an application
+ *  */
+addEventListener('fetch', event => {
+    event.respondWith(handleRequest(event.request))
+})
+
+function handler(request) {
+    const init = {
+        headers: { 'content-type': 'application/json' },
+    }
+    const body = JSON.stringify({ some: 'json' })
+    return new Response(body, init)
+}
+
+async function handleRequest(request) {
+    const r = new Router()
+    // Replace with the appropriate paths and handlers
+    r.get('.*/bar', () => new Response('responding for /bar'))
+    r.get('.*/foo', request => handler(request))
+    r.post('.*/foo.*', request => handler(request))
+    r.get('/demos/router/foo', request => fetch(request)) // return the response from the origin
+
+    r.get('/', () => new Response('Hello worker!')) // return a default message for the root route
+
+    const resp = await r.route(request)
+    return resp
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..316b472
--- /dev/null
+++ b/package.json
@@ -0,0 +1,18 @@
+{
+    "name": "dzserver",
+    "version": "1.0.0",
+    "description": "package for creating workers templates",
+    "main": "index.js",
+    "scripts": {
+        "test": "echo \"Error: no test specified\" && exit 1",
+        "format": "prettier --write '**/*.{js,css,json,md}'"
+    },
+    "author": "uh_wot <uhwot@protonmail.com>",
+    "license": "ISC",
+    "devDependencies": {
+        "prettier": "^1.17.0"
+    },
+    "dependencies": {
+        "serverless-cloudflare-workers": "^1.2.0"
+    }
+}
diff --git a/router.js b/router.js
new file mode 100644
index 0000000..6e1fb94
--- /dev/null
+++ b/router.js
@@ -0,0 +1,121 @@
+/**
+ * Helper functions that when passed a request will return a
+ * boolean indicating if the request uses that HTTP method,
+ * header, host or referrer.
+ */
+const Method = method => req =>
+    req.method.toLowerCase() === method.toLowerCase()
+const Connect = Method('connect')
+const Delete = Method('delete')
+const Get = Method('get')
+const Head = Method('head')
+const Options = Method('options')
+const Patch = Method('patch')
+const Post = Method('post')
+const Put = Method('put')
+const Trace = Method('trace')
+
+const Header = (header, val) => req => req.headers.get(header) === val
+const Host = host => Header('host', host.toLowerCase())
+const Referrer = host => Header('referrer', host.toLowerCase())
+
+const Path = regExp => req => {
+    const url = new URL(req.url)
+    const path = url.pathname
+    const match = path.match(regExp) || []
+    return match[0] === path
+}
+
+/**
+ * The Router handles determines which handler is matched given the
+ * conditions present for each request.
+ */
+class Router {
+    constructor() {
+        this.routes = []
+    }
+
+    handle(conditions, handler) {
+        this.routes.push({
+            conditions,
+            handler,
+        })
+        return this
+    }
+
+    connect(url, handler) {
+        return this.handle([Connect, Path(url)], handler)
+    }
+
+    delete(url, handler) {
+        return this.handle([Delete, Path(url)], handler)
+    }
+
+    get(url, handler) {
+        return this.handle([Get, Path(url)], handler)
+    }
+
+    head(url, handler) {
+        return this.handle([Head, Path(url)], handler)
+    }
+
+    options(url, handler) {
+        return this.handle([Options, Path(url)], handler)
+    }
+
+    patch(url, handler) {
+        return this.handle([Patch, Path(url)], handler)
+    }
+
+    post(url, handler) {
+        return this.handle([Post, Path(url)], handler)
+    }
+
+    put(url, handler) {
+        return this.handle([Put, Path(url)], handler)
+    }
+
+    trace(url, handler) {
+        return this.handle([Trace, Path(url)], handler)
+    }
+
+    all(handler) {
+        return this.handle([], handler)
+    }
+
+    route(req) {
+        const route = this.resolve(req)
+
+        if (route) {
+            return route.handler(req)
+        }
+
+        return new Response('resource not found', {
+            status: 404,
+            statusText: 'not found',
+            headers: {
+                'content-type': 'text/plain',
+            },
+        })
+    }
+
+    /**
+     * resolve returns the matching route for a request that returns
+     * true for all conditions (if any).
+     */
+    resolve(req) {
+        return this.routes.find(r => {
+            if (!r.conditions || (Array.isArray(r) && !r.conditions.length)) {
+                return true
+            }
+
+            if (typeof r.conditions === 'function') {
+                return r.conditions(req)
+            }
+
+            return r.conditions.every(c => c(req))
+        })
+    }
+}
+
+module.exports = Router
diff --git a/wrangler.toml b/wrangler.toml
new file mode 100644
index 0000000..0bc6a52
--- /dev/null
+++ b/wrangler.toml
@@ -0,0 +1,6 @@
+name = "dzserver"
+type = "webpack"
+account_id = "03479b0523a52b140e0dabac40cb0fc8"
+workers_dev = true
+route = ""
+zone_id = ""