Moves API handlers from server/lambda to /api

api/server-status.js

@@ -0,0 +1,69 @@
+const https = require('https');
+const { performance, PerformanceObserver } = require('perf_hooks');
+
+exports.handler = async function(event, context) {
+  const { url } = event.queryStringParameters;
+
+  if (!url) {
+    return {
+      statusCode: 400,
+      body: JSON.stringify({ error: 'You must provide a URL query parameter!' }),
+    };
+  }
+
+  let dnsLookupTime;
+  let responseCode;
+  let startTime;
+
+  const obs = new PerformanceObserver((items) => {
+    dnsLookupTime = items.getEntries()[0].duration;
+    performance.clearMarks();
+  });
+
+  obs.observe({ entryTypes: ['measure'] });
+
+  performance.mark('A');
+
+  try {
+    startTime = performance.now();
+    const response = await new Promise((resolve, reject) => {
+      const req = https.get(url, res => {
+        let data = '';
+        responseCode = res.statusCode;
+        res.on('data', chunk => {
+          data += chunk;
+        });
+        res.on('end', () => {
+          resolve(res);
+        });
+      });
+
+      req.on('error', reject);
+      req.end();
+    });
+
+    if (responseCode < 200 || responseCode >= 400) {
+      return {
+        statusCode: 200,
+        body: JSON.stringify({ error: `Received non-success response code: ${responseCode}` }),
+      };
+    }
+
+    performance.mark('B');
+    performance.measure('A to B', 'A', 'B');
+    let responseTime = performance.now() - startTime;
+    obs.disconnect();
+
+    return {
+      statusCode: 200,
+      body: JSON.stringify({ isUp: true, dnsLookupTime, responseTime, responseCode }),
+    };
+
+  } catch (error) {
+    obs.disconnect();
+    return {
+      statusCode: 200,
+      body: JSON.stringify({ error: `Error during operation: ${error.message}` }),
+    };
+  }
+};