Pass the raw Express request to CallableContext (#269)

Author: Laurent Pellegrino

spec/providers/https.spec.ts

@@ -443,6 +443,24 @@ describe('callable.FunctionBuilder', () => {
         },
       });
     });
+
+    it('should expose raw request', async () => {
+      const mockRequest = request(null, 'application/json', {});
+      await runTest({
+        httpRequest: mockRequest,
+        expectedData: null,
+        callableFunction: (data, context) => {
+          expect(context.rawRequest).to.not.be.undefined;
+          expect(context.rawRequest).to.equal(mockRequest);
+          return null;
+        },
+        expectedHttpResponse: {
+          status: 200,
+          headers: expectedResponseHeaders,
+          body: {result: null},
+        },
+      });
+    });
   });
 });
 

src/providers/https.ts

@@ -217,6 +217,11 @@ export interface CallableContext {
    * An unverified token for a Firebase Instance ID.
    */
   instanceIdToken?: string;
+
+  /**
+   * The raw request handled by the callable.
+   */
+  rawRequest: express.Request;
 }
 
 // The allowed interface for an http request for a callable function.
@@ -373,7 +378,7 @@ export function onCall(
         throw new HttpsError('invalid-argument', 'Bad Request');
       }
 
-      const context: CallableContext = {};
+      const context: CallableContext = { rawRequest: req };
 
       const authorization = req.header('Authorization');
       if (authorization) {