Fix #3: handle og:image meta tag

.gitignore

@@ -102,3 +102,4 @@ dist
 
 # TernJS port file
 .tern-port
+.DS_Store

index.js

@@ -1,27 +1,44 @@
 const fetch = require('node-fetch'),
-      express = require('express'),
-      app = express()
+express = require('express'),
+app = express()
 
-const parse = (body) => {
-  let match = body.match(/<title>([^<]*)<\/title>/) // regular expression to parse contents of the <title> tag
-  if (!match || typeof match[1] !== 'string')
+// fontion parse : 
+// attendus : doit renvoyer un json contenant les éléments title et image
+// comment tester : vérifier que c'est du json, que title est du texte, ..
+const parse = body => {
+    let matchTitle = body.match(/<title>([^<]*)<\/title>/) // regular expression to parse contents of the <title> tag
+    let matchImage = body.match(/([a-z\-_0-9\/\:\.]*\.(jpg|jpeg|png))/i) // regular expression to parse contents of the <meta> tag, NB: not working for other path than http.. https://regex101.com/r/rX1zK7/1 
+  if (!matchTitle || typeof matchTitle[1] !== 'string')
     throw new Error('Unable to parse the title tag')
-  return {
-      title: match[1],
-      image: "TODO" 
+  if (!matchImage) {
+    throw new Error('Unable to parse the meta tag')
+  }
+  else return {
+      title: matchTitle[1],
+      image: matchImage[0]
   }
 }
 
+app.use(function (req, res, next) {
+    res.setHeader(
+      'Content-Security-Policy-Report-Only',
+      "default-src 'self'; font-src 'self'; img-src 'self'; script-src 'self'; style-src 'self'; frame-src 'self'"
+    );
+    next();
+  });
+
 app.get('/', (req, res) => {
   const { url } = req.query
   if (!url)
     return res.status(400).end('Missing url query parameter')
-  
+
   fetch(url)
     .then(res => res.text()) // parse response's body as text
     .then(body => parse(body)) // extract infos from body
-    .then(json => res.send(json)) // send the result back
+    .then(json => res.json(json)) // send the result back
     .catch(e => res.status(500).end(e.message)) // catch possible errors
 })
 
 app.listen(80)
+
+// query /tblOT7RAdbNGccvtG?fields%5B%5D=Titre+de+la+formation&fields%5B%5D=Organisme&maxRecords=100&sort%5B0%5D%5Bfield%5D=Titre+de+la+formation