Chapter 4: initial recipe samples

Chapter04/post-server/json-server.js

@@ -0,0 +1,56 @@
+const http = require('http')
+const fs = require('fs')
+const path = require('path')
+
+const form = fs.readFileSync(path.join(__dirname, 'public', 'form.html'))
+
+http.createServer((req, res) => {
+    if (req.method === 'GET') {
+        get(res)
+        return
+    }
+
+    if (req.method === 'POST') {
+        post(req, res)
+        return
+    }
+    error(405, res)
+}).listen(3000)
+
+function get(res) {
+    res.writeHead(200, {
+        'Content-Type': 'text/html'
+    })
+    res.end(form)
+}
+
+function post(req, res) {
+    if (req.headers['content-type'] !== 'application/json') {
+        error(415, res)
+        return
+    }
+
+    let input = '';
+
+    req.on('data', chunk => {
+        input += chunk.toString()
+    })
+
+    req.on('end', () => {
+        const parsed = JSON.parse(input)
+
+        if (parsed.err) {
+            error(400, 'Bad Request', res)
+            return
+        }
+
+        console.log('Received data: ', parsed)
+        res.end('{"data": ' + input + "}")
+    })
+
+}
+
+function error(code, res) {
+    res.statusCode = code
+    res.end(http.STATUS_CODES[code])
+}