Fix profile parsing with content types that contain a charset

lib/parse.js

@@ -7,6 +7,6 @@ function parse (profile, graph, uri, mimeType, callback) {
     $rdf.parse(profile, graph, uri, mimeType)
     return callback(null, graph)
   } catch(e) {
-    return callback('Cound not load/parse profile data')
+    return callback(new Error('Could not load/parse profile data: ' + e))
   }
 }

test/test.js

@@ -31,7 +31,31 @@ describe('WebID', function () {
             '',
             'text/html',
             function (err, result) {
-              expect(err).to.equal('Cound not load/parse profile data')
+              expect(err.message).to.include('Could not load/parse profile data')
+              done()
+            })
+      })
+
+      it('should succeed on text/turtle', function (done) {
+        tls.verifyKey(
+            validCert,
+            'https://test_nicola.databox.me/profile/card#me',
+            '',
+            'text/turtle',
+            function (err, result) {
+              expect(err.message).to.not.include('Could not load/parse profile data')
+              done()
+            })
+      })
+
+      it('should succeed on text/turtle; charset=utf-8', function (done) {
+        tls.verifyKey(
+            validCert,
+            'https://test_nicola.databox.me/profile/card#me',
+            '',
+            'text/turtle; charset=utf-8',
+            function (err, result) {
+              expect(err.message).to.not.include('Could not load/parse profile data')
               done()
             })
       })

tls/index.js

@@ -29,13 +29,13 @@ function verify (certificate, callback) {
 
   // Get first URI
   var uri = uris.shift()
-  get(uri, function (err, body, headers) {
+  get(uri, function (err, body, contentType) {
     if (err) {
       return callback(err)
     }
 
     // Verify Key
-    verifyKey(certificate, uri, body, headers, function (err, success) {
+    verifyKey(certificate, uri, body, contentType, function (err, success) {
       return callback(err, uri)
     })
   })
@@ -54,7 +54,7 @@ function getUris (certificate) {
   return uris
 }
 
-function verifyKey (certificate, uri, profile, mimeType, callback) {
+function verifyKey (certificate, uri, profile, contentType, callback) {
   var graph = new Graph()
   var found = false
 
@@ -66,6 +66,7 @@ function verifyKey (certificate, uri, profile, mimeType, callback) {
     return callback(new Error('Missing exponent value in client certificate'))
   }
 
+  var mimeType = contentType.replace(/;.*/, '')
   parse(profile, graph, uri, mimeType, function (err) {
     if (err) {
       return callback(err)