Http Handlers

packages/core-handler/.gitignore

@@ -0,0 +1,7 @@
+/node_modules/
+/build/
+/coverage/
+/docs/
+*.tgz
+*.log
+package-lock.json

packages/core-handler/.npmignore

@@ -0,0 +1,16 @@
+/src/
+/coverage/
+/docs/
+tsconfig.test.json
+
+*.spec.js
+*.spec.d.ts
+*.spec.js.map
+
+*.mock.js
+*.mock.d.ts
+*.mock.js.map
+
+*.fixture.js
+*.fixture.d.ts
+*.fixture.js.map

packages/core-handler/LICENSE

@@ -0,0 +1,201 @@
+Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "{}"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright {yyyy} {name of copyright owner}
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

packages/core-handler/README.md

@@ -0,0 +1 @@
+# core-handler

packages/core-handler/package.json

@@ -0,0 +1,24 @@
+{
+  "name": "@aws/core-handler",
+  "description": "AWS SDK Core Handler",
+  "private": true,
+  "version": "0.0.1",
+  "scripts": {
+    "prepublishOnly": "tsc",
+    "pretest": "tsc -p tsconfig.test.json",
+    "test": "jest"
+  },
+  "dependencies": {
+    "@aws/types": "^0.0.1",
+    "tslib": "^1.8.0"
+  },
+  "main": "./build/index.js",
+  "types": "./build/index.d.ts",
+  "author": "[email protected]",
+  "license": "Apache-2.0",
+  "devDependencies": {
+    "@types/jest": "^20.0.2",
+    "jest": "^20.0.4",
+    "typescript": "^2.6.1"
+  }
+}

packages/core-handler/src/index.spec.ts

@@ -0,0 +1,73 @@
+import {CoreHandler} from './index';
+
+describe('CoreHandler', () => {
+    const mockResponse = {};
+    const mockResponseParser = {
+        parse: jest.fn(() => Promise.resolve(mockResponse))
+    };
+    const mockHttpHandler = {
+        handle: jest.fn(() => Promise.resolve())
+    };
+    const mockExecutionContext = {
+        model: {} as any,
+        logger: {} as any
+    }
+    const coreHandler = new CoreHandler(mockHttpHandler, mockResponseParser, mockExecutionContext);
+
+    describe('#handle', () => {
+        beforeEach(() => {
+            jest.clearAllMocks();
+        });
+
+        it(`calls the httpHandler's handle method`, async () => {
+            await coreHandler.handle({
+                input: {},
+                request: {} as any
+            });
+
+            expect(mockHttpHandler.handle.mock.calls.length).toBe(1);
+        });
+
+        it(`forwards abortSignal to httpHandler`, async () => {
+            const mockAbortSignal = {};
+            await coreHandler.handle({
+                abortSignal: mockAbortSignal as any,
+                input: {},
+                request: {} as any
+            });
+
+            expect(mockHttpHandler.handle.mock.calls.length).toBe(1);
+            expect(mockHttpHandler.handle.mock.calls[0][1].abortSignal).toBe(mockAbortSignal);
+        });
+
+        it(`returns the responseParser's output`, async () => {
+            let output = await coreHandler.handle({
+                input: {},
+                request: {} as any
+            });
+
+            expect(mockResponseParser.parse.mock.calls.length).toBe(1);
+            expect(output).toBe(mockResponse);
+        });
+
+        it(`passes the model to the responseParser`, async () => {
+            let output = await coreHandler.handle({
+                input: {},
+                request: {} as any
+            });
+
+            expect(mockResponseParser.parse.mock.calls.length).toBe(1);
+            expect(mockResponseParser.parse.mock.calls[0][0]).toBe(mockExecutionContext.model);
+            expect(output).toBe(mockResponse);
+        });
+
+        it('throws an error if request is missing', async () => {
+            await expect(coreHandler.handle({
+                input: {},
+            })).rejects.toHaveProperty('message');
+
+            expect(mockHttpHandler.handle.mock.calls.length).toBe(0);
+            expect(mockResponseParser.parse.mock.calls.length).toBe(0);
+        });
+    });
+});

packages/core-handler/src/index.ts

@@ -0,0 +1,36 @@
+import {
+    Handler,
+    HandlerArguments,
+    HandlerExecutionContext,
+    HttpHandler,
+    MetadataBearer,
+    ResponseParser
+} from '@aws/types';
+
+export class CoreHandler<
+    InputType extends object,
+    OutputType extends MetadataBearer,
+    StreamType = Uint8Array
+> implements Handler<InputType, OutputType, StreamType> {
+    constructor(
+        private readonly httpHandler: HttpHandler<StreamType>,
+        private readonly responseParser: ResponseParser<StreamType>,
+        private readonly executionContext: HandlerExecutionContext
+    ) {}
+
+    handle(args: HandlerArguments<InputType, StreamType>): Promise<OutputType> {
+        if (!args.request) {
+            return Promise.reject(new Error('Request does not exist'));
+        }
+
+        return this.httpHandler.handle(args.request, {
+            abortSignal: args.abortSignal
+        })
+        .then(response => {
+            return this.responseParser.parse<OutputType>(
+                this.executionContext.model,
+                response
+            );
+        });
+    }
+}

packages/core-handler/tsconfig.json

@@ -0,0 +1,19 @@
+{
+    "compilerOptions": {
+        "target": "es5",
+        "module": "commonjs",
+        "declaration": true,
+        "strict": true,
+        "sourceMap": true,
+        "downlevelIteration": true,
+        "importHelpers": true,
+        "noEmitHelpers": true,
+        "lib": [
+            "es5",
+            "es2015.promise",
+            "es2015.collection"
+        ],
+        "rootDir": "./src",
+        "outDir": "./build"
+    }
+}