Initial commit

Author: mxstbr

.gitignore

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+blog-views
+node_modules
+.DS_STORE

README.md

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+# `mxstbr.blog` view counter
+
+A simple Node microservice to count the views of blogposts on `mxstbr.blog`.
+
+## Uses
+
+- [`micro`](https://github.com/zeit/micro) to create the service.
+- [`level`](https://github.com/level/level) to store the data.
+- [`then-levelup`](https://github.com/then/then-levelup) to promisify `level`.
+
+## Gotchas
+
+Currently this uses `level` for data storage, which doesn't have atomic operations. That means a view that happens while another view is registered will override the first view.
+
+## License
+
+Copyright ©️ 2016 Maximilian Stoiber, licensed under the MIT License.

index.js

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+const url = require('url')
+const level = require('level')
+const then = require('then-levelup')
+const { send, createError } = require('micro')
+
+const db = then(level('blog-views'))
+
+module.exports = async function (req, res) {
+	// Check that a blogpost is provided
+	const { pathname } = url.parse(req.url)
+	if (pathname.length <= 1) {
+		throw createError(400, 'Please include a path to a blogpost.')
+	}
+	// Get the views
+	let views
+	try {
+		views = parseInt(await db.get(pathname), 10)
+	} catch (err) {
+		// If the post doesn't have views yet, initialise the post with one view
+		await db.put(pathname, 1)
+		send(res, 200, { views: 1 })
+		return
+	}
+	// Increment the views and send them back to client
+	await db.put(pathname, views + 1)
+	send(res, 200, { views: views + 1 })
+}

package.json

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+{
+  "name": "blog-view-counter",
+  "version": "1.0.0",
+  "description": "A simple node microservice to count the views of a blogpost.",
+  "main": "index.js",
+  "scripts": {
+    "start": "micro -p 3000 -H localhost index.js",
+    "dev": "NODE_ENV=development nodemon --config package.json index.js"
+  },
+  "author": "Max Stoiber <contact@mxstbr.com> (http://mxstbr.com/)",
+  "license": "MIT",
+  "dependencies": {
+    "level": "^1.5.0",
+    "levelplus": "^0.0.5",
+    "micro": "^6.1.0",
+    "then-levelup": "^1.0.2"
+  },
+  "devDependencies": {},
+  "execMap": {
+    "js": "micro -p 3000 -H localhost"
+  }
+}