Dev

modules/analyze.js

@@ -5,28 +5,73 @@ const now = require('performance-now');
 const { isURL } = require('validator');
 const makeHttpRequest = require('./httpRequest');
 const performDnsLookup = require('./dnsLookup');
+const checkSSLCertificate = require('./sslCheck');
 
 function analyzeURL(req, res) {
   try {
     if (!req.body.url) {
       throw new Error('URL is missing');
     }
 
-    const urlToAnalyze = req.body.url;
+    let urlToAnalyze = req.body.url.trim();
+    const originalUrl = urlToAnalyze;
+    const parsedUrl = url.parse(urlToAnalyze);
+    const hadProtocol = !!parsedUrl.protocol;
+
+    // If no protocol, try HTTPS first
+    if (!hadProtocol) {
+      urlToAnalyze = `https://${urlToAnalyze}`;
+    }
 
+    // Validate the URL
     if (!isURL(urlToAnalyze)) {
       throw new Error('Invalid URL');
     }
 
     const hostname = url.parse(urlToAnalyze).hostname;
+    const isHttps = urlToAnalyze.startsWith('https://');
+
+    // Try the request
     makeHttpRequest(urlToAnalyze, {}, (responseDetails, latencyMs, httpRequestError) => {
+      // If HTTPS failed and we added the protocol (no protocol originally), try HTTP as fallback
+      if (httpRequestError && isHttps && !hadProtocol) {
+        const httpUrl = urlToAnalyze.replace('https://', 'http://');
+        return makeHttpRequest(httpUrl, {}, (httpResponseDetails, httpLatencyMs, httpError) => {
+          if (httpError || !httpResponseDetails) {
+            return res.json({ 
+              isUp: false, 
+              ipAddress: null, 
+              uptime: 0, 
+              latencyMs: 0, 
+              dnsLookupMs: 0,
+              statusCode: null,
+              protocol: 'http',
+              sslInfo: null
+            });
+          }
+          processResponse(httpResponseDetails, httpLatencyMs, hostname, 'http', res);
+        });
+      }
+
       if (httpRequestError || !responseDetails) {
         console.error(`Failed to request ${urlToAnalyze}: ${httpRequestError || 'Unknown error'}`);
-        return res.json({ isUp: false, ipAddress: null, uptime: 0, latencyMs: 0, dnsLookupMs: 0 });
+        return res.json({ 
+          isUp: false, 
+          ipAddress: null, 
+          uptime: 0, 
+          latencyMs: 0, 
+          dnsLookupMs: 0,
+          statusCode: null,
+          protocol: isHttps ? 'https' : 'http',
+          sslInfo: null
+        });
       }
+
+      processResponse(responseDetails, latencyMs, hostname, isHttps ? 'https' : 'http', res);
+    });
 
-      const isUp =
-        responseDetails.statusCode >= 200 && responseDetails.statusCode < 400;
+    function processResponse(responseDetails, latencyMs, hostname, protocol, res) {
+      const isUp = responseDetails.statusCode >= 200 && responseDetails.statusCode < 400;
       if (!isUp) {
         return res.json({
           isUp: false,
@@ -35,31 +80,58 @@ function analyzeURL(req, res) {
           latencyMs,
           dnsLookupMs: 0,
           statusCode: responseDetails.statusCode,
+          protocol: protocol,
+          sslInfo: null
         });
       }
 
       performDnsLookup(hostname, ({ ipAddress, lookupMs, error: dnsLookupError }) => {
         if (dnsLookupError) {
-          console.error(`Failed to lookup IP address for ${urlToAnalyze}: ${dnsLookupError}`);
+          console.error(`Failed to lookup IP address: ${dnsLookupError}`);
           return res.status(500).json({ error: 'Internal server error' });
         }
 
-        // Calculate uptime baseline on successful check
-        const uptime = 100;
-
-        console.log(
-          `isUp: ${isUp}, ipAddress: ${ipAddress}, uptime: ${uptime}%, latencyMs: ${latencyMs}, dnsLookupMs: ${lookupMs}`
-        );
-        return res.json({
-          isUp: true,
-          ipAddress,
-          uptime,
-          latencyMs,
-          dnsLookupMs: lookupMs,
-          statusCode: responseDetails.statusCode,
-        });
+        // Check SSL certificate if HTTPS
+        if (protocol === 'https') {
+          checkSSLCertificate(hostname, 443, (sslError, sslInfo) => {
+            const uptime = 100;
+            const response = {
+              isUp: true,
+              ipAddress,
+              uptime,
+              latencyMs,
+              dnsLookupMs: lookupMs,
+              statusCode: responseDetails.statusCode,
+              protocol: protocol,
+              sslInfo: sslInfo
+            };
+
+            console.log(
+              `isUp: ${isUp}, ipAddress: ${ipAddress}, uptime: ${uptime}%, latencyMs: ${latencyMs}, dnsLookupMs: ${lookupMs}, protocol: ${protocol}, sslInfo: ${sslInfo ? JSON.stringify(sslInfo) : 'null'}`
+            );
+            return res.json(response);
+          });
+        } else {
+          // HTTP - no SSL info
+          const uptime = 100;
+          const response = {
+            isUp: true,
+            ipAddress,
+            uptime,
+            latencyMs,
+            dnsLookupMs: lookupMs,
+            statusCode: responseDetails.statusCode,
+            protocol: protocol,
+            sslInfo: null
+          };
+
+          console.log(
+            `isUp: ${isUp}, ipAddress: ${ipAddress}, uptime: ${uptime}%, latencyMs: ${latencyMs}, dnsLookupMs: ${lookupMs}, protocol: ${protocol}`
+          );
+          return res.json(response);
+        }
       });
-    });
+    }
   } catch (error) {
     console.error(`Error analyzing URL: ${error.message}`);
     return res.status(400).json({ error: error.message });

modules/sslCheck.js

@@ -0,0 +1,60 @@
+const https = require('https');
+const tls = require('tls');
+
+function checkSSLCertificate(hostname, port = 443, callback) {
+  let certRetrieved = false;
+
+  // Use tls.connect for more reliable certificate retrieval
+  const socket = tls.connect({
+    host: hostname,
+    port: port,
+    rejectUnauthorized: false, // We want to check even if cert is invalid
+    servername: hostname, // Important for SNI
+  }, () => {
+    try {
+      const cert = socket.getPeerCertificate(true);
+
+      if (cert && cert.valid_to) {
+        certRetrieved = true;
+        const expirationDate = new Date(cert.valid_to);
+        const now = new Date();
+        const daysUntilExpiry = Math.ceil((expirationDate - now) / (1000 * 60 * 60 * 24));
+
+        callback(null, {
+          expirationDate: expirationDate.toISOString(),
+          daysUntilExpiry: daysUntilExpiry,
+          isValid: expirationDate > now,
+          issuer: cert.issuer ? (cert.issuer.CN || JSON.stringify(cert.issuer)) : null,
+          subject: cert.subject ? (cert.subject.CN || hostname) : hostname,
+        });
+      } else {
+        callback(null, null);
+      }
+    } catch (err) {
+      callback(null, null);
+    } finally {
+      if (!socket.destroyed) {
+        socket.end();
+      }
+    }
+  });
+
+  socket.on('error', (error) => {
+    if (!certRetrieved) {
+      // If we can't get the certificate, return null (might be HTTP or connection issue)
+      callback(null, null);
+    }
+  });
+
+  socket.on('timeout', () => {
+    if (!certRetrieved) {
+      socket.destroy();
+      callback(null, null);
+    }
+  });
+
+  socket.setTimeout(5000);
+}
+
+module.exports = checkSSLCertificate;
+