Develop

.gitignore

@@ -75,3 +75,6 @@ typings/
 # FuseBox cache
 .fusebox/
 
+# Vim
+*.swp
+

ext/spec_0_2.json

@@ -0,0 +1,74 @@
+{
+  "$ref": "#/definitions/event",
+  "definitions": {
+    "specversion": {
+      "type": "string",
+      "minLength": 1,
+      "const": "0.2"
+    },
+    "contenttype": {
+      "type": "string"
+    },
+    "data": {
+      "type": [
+        "object",
+        "string"
+      ]
+    },
+    "event": {
+      "properties": {
+        "specversion": {
+          "$ref": "#/definitions/specversion"
+        },
+        "contenttype": {
+          "$ref": "#/definitions/contenttype"
+        },
+        "data": {
+          "$ref": "#/definitions/data"
+        },
+        "id": {
+          "$ref": "#/definitions/id"
+        },
+        "time": {
+          "$ref": "#/definitions/time"
+        },
+        "type": {
+          "$ref": "#/definitions/type"
+        },
+        "extensions": {
+          "$ref": "#/definitions/extensions"
+        },
+        "source": {
+          "$ref": "#/definitions/source"
+        }
+      },
+      "required": [
+        "specversion",
+        "id",
+        "type",
+        "source"
+      ],
+      "type": "object"
+    },
+    "id": {
+      "type": "string",
+      "minLength": 1
+    },
+    "time": {
+      "format": "date-time",
+      "type": "string"
+    },
+    "type": {
+      "type": "string",
+      "minLength": 1
+    },
+    "extensions": {
+      "type": "object"
+    },
+    "source": {
+      "format": "uri-reference",
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

lib/bindings/http/binary_0_2.js

@@ -17,9 +17,7 @@ HTTPBinary.prototype.emit = function(cloudevent){
   // Always set stuff in _config
   var _headers = _config["headers"];
 
-  if(cloudevent.getContenttype()) {
-    _headers["Content-Type"] = cloudevent.getContenttype();
-  }
+  _headers["Content-Type"] = cloudevent.getContenttype();
 
   _headers["ce-type"] = cloudevent.getType();
   _headers["ce-specversion"] = cloudevent.getSpecversion();
@@ -36,7 +34,9 @@ HTTPBinary.prototype.emit = function(cloudevent){
   // Have extensions?
   var exts = cloudevent.getExtensions(); 
   for(var ext in exts){
-    _headers["ce-" + ext] = exts[ext];
+    if({}.hasOwnProperty.call(exts, ext)){
+      _headers["ce-" + ext] = exts[ext];
+    }
   }
 
   // Return the Promise

lib/specs/spec_0_2.js

@@ -1,5 +1,25 @@
 var uuid  = require("uuid/v4");
 var empty = require("is-empty");
+var Ajv   = require("ajv");
+
+// Reserved attributes names
+const reserved = {
+  type: "type",
+  specversion: "specversion",
+  source: "source",
+  id: "id",
+  time: "time",
+  schemaurl: "schemaurl",
+  contenttype: "contenttype",
+  data: "data"
+};
+
+const schema = require("../../ext/spec_0_2.json");
+
+// Default options
+const ajv = new Ajv();
+
+const validate = ajv.compile(schema);
 
 function Spec02(){
   this.payload = {
@@ -13,22 +33,12 @@ function Spec02(){
  */
 Spec02.prototype.check = function(){
 
-  if(empty(this.payload["type"])) {
-    throw {message: "'type' is invalid"};
-  }
-
-  if(empty(this.payload["specversion"])) {
-    throw {message: "'specversion' is invalid"};
-  }
+  var valid = validate(this.payload);
 
-  if(this.payload["specversion"] !== "0.2") {
-    throw {message: "'specversion' value is invalid: '"
-      + this.payload["specversion"] + "'"};
+  if(!valid) {
+    throw {message: "invalid payload"};
   }
 
-  if(empty(this.payload["id"])) {
-    throw {message: "'id' is invalid"};
-  }
 };
 
 Spec02.prototype.type = function(_type){
@@ -95,7 +105,11 @@ Spec02.prototype.getData = function() {
 };
 
 Spec02.prototype.addExtension = function(key, value){
-  this.payload[key] = value;
+  if(!reserved.hasOwnProperty(key)){
+    this.payload[key] = value;
+  } else {
+    throw {message: "Reserved attribute name: '" + key + "'"};
+  }
   return this;
 };
 

package.json

@@ -30,6 +30,7 @@
   },
   "homepage": "https://github.com/cloudevents/sdk-javascript#readme",
   "dependencies": {
+    "ajv": "^6.7.0",
     "axios": "0.18.0",
     "is-empty": "1.2.0",
     "uri-js": "4.2.2",

test/cloudevent_spec_0_2.js

@@ -9,9 +9,10 @@ const contenttype = "application/json";
 const data = {};
 const extensions = {};
 
-var cloudevent = new Cloudevent(Cloudevent.specs["0.2"])
-                       .type(type)
-                       .source(source);
+var cloudevent = 
+  new Cloudevent(Cloudevent.specs["0.2"])
+        .type(type)
+        .source(source);
 
 describe("CloudEvents Spec 0.2 - JavaScript SDK", () => {
 
@@ -65,6 +66,17 @@ describe("CloudEvents Spec 0.2 - JavaScript SDK", () => {
         cloudevent.addExtension("extension2", "value2");
         expect(cloudevent.format()["extension2"]).to.equal("value2");
       });
+
+      it("should throw an error when employ reserved name as extension", () => {
+
+        var cevt = 
+          new Cloudevent(Cloudevent.specs["0.2"])
+                .type(type)
+                .source(source);
+        expect(cevt.addExtension.bind(cevt, "id"))
+          .to
+          .throw("Reserved attribute name: 'id'");
+      });
     });
 
     describe("The Constraints check", () => {
@@ -73,7 +85,7 @@ describe("CloudEvents Spec 0.2 - JavaScript SDK", () => {
           cloudevent.type("");
           expect(cloudevent.format.bind(cloudevent))
             .to
-            .throw("'type' is invalid");
+            .throw("invalid payload");
         });
 
         it("must be a non-empty string", () => {
@@ -95,7 +107,15 @@ describe("CloudEvents Spec 0.2 - JavaScript SDK", () => {
           cloudevent.spec.payload.specversion = "";
           expect(cloudevent.format.bind(cloudevent))
             .to
-            .throw("'specversion' is invalid");
+            .throw("invalid payload");
+          cloudevent.spec.payload.specversion = "0.2";
+        });
+
+        it("should throw an error when the value is not '0.2'", () => {
+          cloudevent.spec.payload.specversion = "0.4";
+          expect(cloudevent.format.bind(cloudevent))
+            .to
+            .throw("invalid payload");
           cloudevent.spec.payload.specversion = "0.2";
         });
       });
@@ -105,7 +125,7 @@ describe("CloudEvents Spec 0.2 - JavaScript SDK", () => {
           cloudevent.id("");
           expect(cloudevent.format.bind(cloudevent))
             .to
-            .throw("'id' is invalid");
+            .throw("invalid payload");
         });
         it("must be a non-empty string", () => {
           cloudevent.id("my.id-0x0090");