Processing the extensions

Signed-off-by: Fabio José <fabiojose@gmail.com>

lib/bindings/http/receiver_binary_0_2.js

@@ -22,6 +22,10 @@ setter_reflections[Constants.BINARY_HEADERS_02.TYPE] = {
   name : "type",
   parser : (v) => v
 };
+setter_reflections[Constants.BINARY_HEADERS_02.SPEC_VERSION] = {
+  name : "specversion",
+  parser : (v) => "0.2"
+};
 setter_reflections[Constants.BINARY_HEADERS_02.SOURCE] = {
   name : "source",
   parser: (v) => v
@@ -102,6 +106,7 @@ Receiver.prototype.parse = function(payload, headers) {
   // Clone and low case all headers names
   var sanity_headers = Commons.sanity_and_clone(headers);
 
+  var processed_headers = [];
   var cloudevent = new Cloudevent(Spec02);
   for(header in setter_reflections) {
     // dont worry, check() have seen what was required or not
@@ -111,16 +116,31 @@ Receiver.prototype.parse = function(payload, headers) {
 
       // invoke the setter function
       cloudevent[setter_name](parser_fn(sanity_headers[header]));
+
+      // to use ahead, for extensions processing
+      processed_headers.push(header);
     }
   }
 
   // Parses the payload
-  var parsedPayload =
+  var parsed_payload =
     parser_by_type[sanity_headers[Constants.HEADER_CONTENT_TYPE]]
       .parse(payload);
 
+  // Every unprocessed header should be an extension
+  Array.from(Object.keys(sanity_headers))
+  .filter(value => !processed_headers.includes(value))
+  .filter(value =>
+    value.startsWith(Constants.BINARY_HEADERS_02.EXTENSIONS_PREFIX))
+  .map(extension =>
+    extension.substring(Constants.BINARY_HEADERS_02.EXTENSIONS_PREFIX.length)
+  ).forEach(extension =>
+    cloudevent.addExtension(extension,
+      sanity_headers[Constants.BINARY_HEADERS_02.EXTENSIONS_PREFIX+extension])
+  );
+
   // Sets the data
-  cloudevent.data(parsedPayload);
+  cloudevent.data(parsed_payload);
 
   // Checks the event spec
   cloudevent.format();

test/bindings/http/receiver_binary_0_2_tests.js

@@ -353,6 +353,34 @@ describe("HTTP Transport Binding Binary Receiver for CloudEvents v0.2", () => {
       expect(actual)
           .to.be.an("object");
 
+      expect(actual)
+          .to.have.property("format");
+    });
+
+    it("Should accept 'extension1'", () => {
+      // setup
+      var extension1 = "mycuston-ext1";
+      var payload = {
+        "data" : "dataString"
+      };
+      var attributes = {
+        "ce-type"        : "type",
+        "ce-specversion" : "0.2",
+        "ce-source"      : "source",
+        "ce-id"          : "id",
+        "ce-time"        : "2019-06-16T11:42:00Z",
+        "ce-schemaurl"   : "http://schema.registry/v1",
+        "Content-Type"   : "application/json",
+        "ce-extension1"  : extension1
+      };
+
+      // act
+      var actual = receiver.parse(payload, attributes);
+      var actualExtensions = actual.getExtensions();
+
+      // assert
+      expect(actualExtensions["extension1"])
+          .to.equal(extension1);
     });
   });
 });