Support receiving "application/octet-stream" content in binary transport mode

Signed-off-by: Jingwen Peng <pengsrc@outlook.com>

lib/bindings/http/constants.js

@@ -2,9 +2,10 @@
 module.exports = {
   CHARSET_DEFAULT : "utf-8",
 
-  MIME_JSON    : "application/json",
-  MIME_CE      : "application/cloudevents",
-  MIME_CE_JSON : "application/cloudevents+json",
+  MIME_JSON         : "application/json",
+  MIME_OCTET_STREAM : "application/octet-stream",
+  MIME_CE           : "application/cloudevents",
+  MIME_CE_JSON      : "application/cloudevents+json",
 
   HEADER_CONTENT_TYPE : "content-type",
 

lib/bindings/http/receiver_binary_0_2.js

@@ -12,9 +12,13 @@ const {
 
 const parserByType = {};
 parserByType[Constants.MIME_JSON] = new JSONParser();
+parserByType[Constants.MIME_OCTET_STREAM] = {
+  parse(payload) { return payload; }
+};
 
 const allowedContentTypes = [];
 allowedContentTypes.push(Constants.MIME_JSON);
+allowedContentTypes.push(Constants.MIME_OCTET_STREAM);
 
 const requiredHeaders = [];
 requiredHeaders.push(Constants.BINARY_HEADERS_02.TYPE);

lib/bindings/http/unmarshaller_0_2.js

@@ -14,6 +14,7 @@ const receiverByBinding = {
 
 const allowedBinaryContentTypes = [];
 allowedBinaryContentTypes.push(Constants.MIME_JSON);
+allowedBinaryContentTypes.push(Constants.MIME_OCTET_STREAM);
 
 const allowedStructuredContentTypes = [];
 allowedStructuredContentTypes.push(Constants.MIME_CE_JSON);

test/bindings/http/receiver_binary_0_2_tests.js

@@ -285,7 +285,7 @@ describe("HTTP Transport Binding Binary Receiver for CloudEvents v0.2", () => {
         .to.equal("http://schema.registry/v1");
     });
 
-    it("Cloudevent contains 'contenttype'", () => {
+    it("Cloudevent contains 'contenttype' (application/json)", () => {
       // setup
       var payload = {
         "data" : "dataString"
@@ -308,7 +308,28 @@ describe("HTTP Transport Binding Binary Receiver for CloudEvents v0.2", () => {
         .to.equal("application/json");
     });
 
-    it("Cloudevent contains 'data'", () => {
+    it("Cloudevent contains 'contenttype' (application/octet-stream)", () => {
+      // setup
+      var payload = "The payload is binary data";
+      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/octet-stream"
+      };
+
+      // act
+      var actual = receiver.parse(payload, attributes);
+
+      // assert
+      expect(actual.getContenttype())
+        .to.equal("application/json");
+    });
+
+    it("Cloudevent contains 'data' (application/json)", () => {
       // setup
       var payload = {
         "data" : "dataString"
@@ -331,6 +352,27 @@ describe("HTTP Transport Binding Binary Receiver for CloudEvents v0.2", () => {
         .to.deep.equal(payload);
     });
 
+    it("Cloudevent contains 'data' (application/octet-stream)", () => {
+      // setup
+      var payload = "The payload is binary data";
+      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/octet-stream"
+      };
+
+      // act
+      var actual = receiver.parse(payload, attributes);
+
+      // assert
+      expect(actual.getData())
+        .to.deep.equal(payload);
+    });
+
     it("No error when all attributes are in place", () => {
       // setup
       var payload = {