feat: AWS Signature V4 library #1456

dnys1 · 2022-03-12T00:47:39Z

Issue #, if available:
#523

Description of changes:

Adds the aws_signature_v4 library
Adds the aws_common library
Adds mono_repo integration for the AWS libraries

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

codecov-commenter · 2022-03-12T01:29:50Z

Codecov Report

Merging #1456 (58447f6) into main (ce9c4fa) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1456   +/-   ##
=======================================
  Coverage   46.47%   46.48%           
=======================================
  Files         262      261    -1     
  Lines       10194    10192    -2     
=======================================
  Hits         4738     4738           
+ Misses       5456     5454    -2

Flag	Coverage Δ
android-unit-tests	`∅ <ø> (∅)`
flutter-unit-tests	`36.64% <ø> (+<0.01%)`	⬆️
ios-unit-tests	`85.12% <ø> (ø)`

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
packages/amplify_core/lib/src/util/print.dart

cshfang · 2022-04-18T17:22:38Z

.gitallowed

@@ -0,0 +1 @@
+**/test/**


Nit: EOF just because GH pointed it out

I think it just points it out because having newlines at the end can be good/bad depending on the language and so changes should be visible in the PR. It doesn't hurt though to have no newlines.

Yeah it definitely doesn't hurt anymore. But might as well be consistent where we can. For sure not a big deal at all!

packages/aws_common/lib/src/collection/case_insensitive.dart

cshfang · 2022-04-18T18:44:24Z

packages/aws_common/example/aws_common_example.dart

+  final AWSHttpRequest request = AWSHttpRequest.get(
+    Uri.parse('https://httpstat.us/200'),
+  );
+  final http.StreamedResponse response = await request.send();


Sorry for the ignorant question but is this not a AWSHttpResponse because it's going to httpstat? I'm just wondering if it is a relevant example to send an AWSHttpRequest without getting a AWSHttpResponse back as it seems like this becomes just any ol' http request.

Nah, you're right. I didn't used to have an AWSHttpResponse class and never updated this method after adding it. Good catch!

cshfang · 2022-04-18T19:46:56Z

packages/aws_common/lib/src/config/aws_config_value.dart

+      return fromOverride;
+    } else if (fromOverride is String) {
+      final parsed = _tryParse(fromOverride);
+      if (parsed != null) {


Does this mean if the override supplied is invalid (cannot be parsed by _tryParse), just ignore and try other lookups? Not totally sure how this is meant to be used but should it silently fail on an invalid override? Ditto for the rest of the lookups below but raising the question here just because it seems like overriding is an intentional action.

Good call out. I think you're right - it's a conscious act to override, so throwing for invalid values is acceptable, maybe even expected.

Just checked and other SDKs do this as well 👍

cshfang · 2022-04-18T20:11:36Z

packages/aws_common/lib/src/util/debug.dart

+/// Since JS does not support integers, an int and a double will be identical
+/// when representing the same value. However, this will not be true for all
+/// other compilation targets.
+const bool zIsWeb = identical(0, 0.0);


Does there need to be considerations for web views or any (however unlikely)future JS backed compilation targets?

Nope, this is true for any JS target including node: https://api.flutter.dev/flutter/foundation/kIsWeb-constant.html

packages/aws_signature_v4/example/bin/example.dart

packages/aws_signature_v4/test/s3/testdata/chunked_request.sh

cshfang · 2022-04-18T23:32:22Z

packages/aws_signature_v4/test/s3/multiple_chunks_test.dart

+
+import 'testdata/multiple_chunks_testdata.dart';
+
+// From: https://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-streaming.html


What is this in reference to? Ditto single chunk test

This is where the test cases come from

Hm I didn't see anything that looked like tests on that page - what am I missing? 😓

It's towards the bottom of the page: https://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-streaming.html#example-signature-calculations-streaming

packages/aws_signature_v4/test/s3/single_chunk_test.dart

cshfang · 2022-04-19T16:42:37Z

packages/aws_signature_v4/example/web/main.dart

+    document.getElementById('download') as AnchorElement;
+
+void main() {
+  downloadBtnEl.hide();


All my comments here are gonna be nit since this is just an example app anyway but I think it's better practice to set the display of this element inline in the HTML to none as the default styling and then unhide/show it.

Yeah, that sounds good. Fixed 👍

cshfang · 2022-04-19T17:02:31Z

packages/aws_signature_v4/example/web/main.dart

+  final bucketName = bucketNameEl.value;
+  final region = regionEl.value;
+  final files = fileEl.files;
+  if (bucketName == null ||
+      bucketName.isEmpty ||
+      region == null ||
+      region.isEmpty ||
+      files == null ||
+      files.isEmpty) {
+    return null;
+  }


I would extract into a boolean method (E.g. isUploadReady?) since updateState uses it only as a check and has no reason to construct a new BucketUpload just to make that check. Then this method can just also make that check here.

Well the boolean value wouldn't been enough to construct bucket upload though, it would then have to redo all the .value calls and then cast them to non-null.

Yeah I guess both approaches have drawbacks 👍

cshfang · 2022-04-19T17:03:57Z

packages/aws_signature_v4/example/web/main.dart

+  });
+  fileEl.onChange.listen((e) {
+    updateState();
+  });


Do we also need to listen for region.onChange since it is a condition for upload to be available?

Yep, fixed 👍

cshfang · 2022-04-19T17:13:55Z

packages/aws_common/lib/src/http/aws_headers.dart

+// limitations under the License.
+
+/// Headers used in AWS requests.
+abstract class AWSHeaders {


On one hand, I love the simplicity of this approach. On the other, if this were a class that could return headers as a map, would the usage be less AWSHeaders-y - and would that be worthwhile? E.g.

headers: { AWSHeaders.accept: accept, AWSHeaders.host: host, AWSHeaders.contentType: contentType, AWSHeaders.contentLength: contentLength, AWSHeaders.userAgent: userAgent, },

vs

headers: AWSHeaders( accept: accept, host: host, contentType: contentType, contentLength: contentLength, userAgent: userAgent, ).toMap(),

Just a thought, I don't feel super strongly about this since it's quite subjective.

Hmm, I like the idea and will play around with it. I think we can add this later without changing the interface. Right now, I just need a central place for all the headers since most of the time I'm just adding them to to an already existent map.

cshfang · 2022-04-19T17:20:06Z

packages/aws_signature_v4/example/web/main.dart

+extension on ButtonElement {
+  void setBusy(bool busy) {
+    if (busy) {
+      setAttribute('aria-busy', true);


I am all for accessibility but I'm curious why just here 😅

OTOH:

No ARIA is better than bad ARIA

Lol it's what the CSS framework I picked uses

Maybe we could just use simpler example simply disable the button so a reader does't need to know about pico :D

I mean, I don't really have the chops to write a good-looking website for examples. But I'm open to someone else doing that if they can!

cshfang · 2022-04-19T19:54:25Z

packages/aws_signature_v4/lib/src/request/canonical_request/canonical_request.dart

+      if (request.path.endsWith('/')) {
+        path = path.ensureEndsWith('/');
+      }
+      if (!request.path.startsWith('/')) {
+        path = path.ensureStartsWith('/');
+      }


Sanity check:
I understand why you would want to ensure path ends with a slash if request.path ended with a slash.

But I'm not sure I understand why you would only want to ensure path starts with a slash if request.path didn't start with one.

This is just what the signer expects. Normalized paths must end with slashes if the input path ends with one. And normalized paths must always start with a slash, so we add one if it wasn't there. We look at request.path because it's the unnormalized or pre-processed path,

Yeah I think what I am getting at is shouldn't we be able to just always do path = path.ensureStartsWith('/');? It would just make the logical parsing that much simpler here (for readers, the computer doesn't care).

Ohh gotcha. Yeah, updated.

cshfang · 2022-04-19T20:00:03Z

packages/aws_signature_v4/test/s3/testdata/chunked_request.txt

@@ -0,0 +1 @@
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa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I thought I saw a script to generate this. Think we should either not check this in or just leave this as static test data and remove the script in that case?

I mean I kind of like it this way. I think the script provides context to this file, while checking in the file removes the need to regenerate it all the time.

cshfang · 2022-04-19T21:28:52Z

packages/aws_signature_v4/test/zone_test.dart

+    });
+
+    // Sanity check that printing works within signer zones.
+    test('print', () {


What's the expectation if printing doesn't work here?

Removed - it was an old semi-manual test

cshfang · 2022-04-19T21:35:14Z

packages/aws_signature_v4/test/c_test_suite/test_data_loader.dart

+    // This is required to ensure that `context.json` is the first file parsed,
+    // since it's data is used to parse other files accordingly, namely `request.txt`.


Suggested change

// This is required to ensure that `context.json` is the first file parsed,

// since it's data is used to parse other files accordingly, namely `request.txt`.

// This is required to ensure that `context.json` is the first file parsed

// since its data is used to parse other files accordingly, namely `request.txt`.

Could you also help me understand why this ensures context.json is the first file parsed?

Sure, it's because the directory layout is the same for each test.

If the layout ever changed for some reason, this could fail in theory right? I'm just wondering if it would be a simple "future-proofing" to either hardcode or search for the file rather than assuming it's first. Not a big deal though as I suspect this is unlikely to change.

Same answer as below. We're locked to a commit of aws-c-auth since it's a submodule. If anything changes, we'd know since we'd have to manually update the ref with a PR.

Same reply as below 🤣 - it's definitely good to know that we at least have manual update as a friction point but if we were all replaced tomorrow by a whole new team of engineers, it would just have been nice not to set them up for failure. But yeah, not a huge concern by any means

Their response:

Those were probably in the original test suite we started with. There were several tests that had flat-out wrong validation data in them and we skipped. We should remove these.

Updated with list of ignored tests and made it throw now if any file is missing

cshfang · 2022-04-19T21:40:52Z

packages/aws_signature_v4/test/c_test_suite/test_data_loader.dart

+
+    // Some folders do not include all the necessary files. Not sure why - maybe
+    // they are borrowing the rest of the files from other folders, but it's not
+    // clear. This represents only 2 tests, as of writing.


Isn't it important that we figure out what those 2 test suites are for? Also, can/should we assert that this is the case that only 2 test suites are failing to run due to this limitation? If for some reason in the future more requisite files went missing, we wouldn't want to just happily skip the test without an investigation being prompted I think?

I opened an issue with them. Based on their feedback, I'll update as appropriate: awslabs/aws-c-auth#160

Should we still assert that 8 tests are running?

Probably not a huge deal. We're locked to a commit of aws-c-auth since it's a submodule. If anything changes, we'd know since we'd have to manually update the ref with a PR.

Yeah I'm just thinking about someone who's never seen any of this coming in and going oh I can just update the submodule and unknowingly skipped more tests. Not a huge deal - just keeping an eye out for maintainability

packages/aws_signature_v4/lib/src/configuration/service_configuration.dart

cshfang · 2022-04-20T00:03:48Z

packages/aws_signature_v4/lib/src/credentials/credentials_provider.dart

+    const accessKeyId = String.fromEnvironment($awsAccessKeyId);
+    const secretAccessKey = String.fromEnvironment($awsSecretAccessKey);
+    const sessionToken = String.fromEnvironment($awsSessionToken);


Can these be null?

No String.fromEnvironment has a default value of empty string

cshfang · 2022-04-20T00:10:26Z

packages/aws_signature_v4/lib/src/signer/aws_signer.dart

+    if (canonicalRequest.presignedUrl) {
+      queryParameters[AWSHeaders.signature] = signature;
+      // TODO(dnys1): Remove second check when package SDK dep is >=2.15.0
+      if (includeSessionToken && sessionToken != null) {


Does the "second check" refer to the sessionToken != null part of the condition?

I see. I'm still confused why that means it needs to be here when includeSessionToken being true should already mean that sessionToken is not null. 😓

There's an analyzer change in 2.15 which picks up that sessionToken should not be null. In <2.15, the check is required. Here's what it looks like in 2.15:

Gotcha thanks for clarifying

…uration.dart Co-authored-by: Chris F <5827964+cshfang@users.noreply.github.com>

cshfang

Need some more eyes on it since this is a pretty crucial piece of the puzzle but it lgtm

HuiSF · 2022-04-20T22:55:04Z

packages/aws_common/lib/src/config/aws_config_io.dart

+/// {@template aws_common.lookup_platform_env}
+/// Looks up a value from the platform environment.
+/// {@endtemplate}
+String? lookupPlatformEnv(String key) => Platform.environment[key];


nit: could add a default value option?

I'll mark as internal, it's really only for use as part of AWSConfig where default values are being handled already as part of the chain.

HuiSF · 2022-04-20T23:40:46Z

packages/aws_common/lib/src/http/aws_http_request.dart

+  Stream<List<int>> get body =>
+      bodyBytes.isEmpty ? const Stream.empty() : Stream.value(bodyBytes);


What's the benefits wrapping body with a Stream? If I understood correctly, this returned Stream only emits one data event that contains the whole body correct?

Correct. The benefit is a unified interface instead of a ton of checks for if (is HttpRequest) ... else if (is StreamingHttpRequest) .... I can just treat everything as a streaming request. This is similar to the package:http implementation: https://github.com/dart-lang/http/blob/master/lib/src/request.dart#L148

HuiSF · 2022-04-21T18:08:22Z

packages/aws_signature_v4/lib/src/credentials/aws_credential_scope.dart

+  AWSCredentialScope({
+    AWSDateTime? dateTime,
+    required String region,
+    required String service,


question: Can the value of service be restricted by an enum?

Maybe, I'm not 100% sure yet if that's the way we want to go. I'll make a note of this, though.

Did some digging and it looks like we're safe to add an enum for this. Let me know what you think! f763e80

HuiSF · 2022-04-21T22:22:50Z

packages/aws_signature_v4/example/web/main.dart

+extension on ButtonElement {
+  void setBusy(bool busy) {
+    if (busy) {
+      setAttribute('aria-busy', true);


Maybe we could just use simpler example simply disable the button so a reader does't need to know about pico :D

packages/aws_signature_v4/lib/src/configuration/service_configuration.dart

packages/aws_common/lib/src/http/aws_http_response.dart

HuiSF · 2022-04-21T22:52:18Z

packages/aws_signature_v4/lib/src/credentials/aws_credentials.g.dart

@@ -0,0 +1,25 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND


nit: Do we need the license header here? it's a generated file, but it's a part of the codebase...

So going forward, generated code won't have license headers. We will touch base with OS about this but it's much easier to manage this way.

packages/aws_signature_v4/lib/src/request/canonical_request/canonical_headers.dart

packages/aws_signature_v4/lib/src/request/canonical_request/canonical_request.dart

packages/aws_signature_v4/lib/src/signer/aws_signer.dart

packages/aws_common/lib/src/config/aws_service.dart

packages/aws_signature_v4/test/c_test_suite/request_parser.dart

HuiSF

LGTM. I agree that we should have more eyes on this PR.

dnys1 requested a review from a team as a code owner March 12, 2022 00:47

dnys1 enabled auto-merge (squash) March 14, 2022 19:41

dnys1 force-pushed the feat/signer branch from 5d7914b to b7d1e74 Compare March 20, 2022 02:39

Dillon Nys added 16 commits March 29, 2022 10:33

feat: AWS Common library

a9aed37

feat: AWS Signature V4 library

0fee2da

chore: Add mono_repo for AWS libraries

858da1c

chore: Add missing license headers

8aa8a0a

chore(aws_common): Update CHANGELOG

1c9cc7c

chore: Update mono_repo version

4476abe

chore(aws_common): Add config values

118ef00

chore(ci): Update mono_repo configuration

77d4969

fix(aws_common): Fix library import

86a7a6a

chore(aws_common): Add SDK headers

397c319

chore(aws_common): Add missing HTTP methods

5c96744

chore(sigv4): Use Dart VM env on iOS/Android

f818b7c

chore(sigv4): Clean up S3 example

2695ab3

chore(sigv4): Use Duration for expiresIn

9255a5d

chore(sigv4): Make expiresIn required

4da784d

chore(sigv4): Refactor canonical request and service configuration

ea381d2

dnys1 force-pushed the feat/signer branch from ee65558 to ea381d2 Compare March 29, 2022 17:33

Dillon Nys added 4 commits March 31, 2022 07:50

chore(aws_common): Clean up

15eeb6a

chore(aws_common): Add example and tests

e57cbf3

chore(aws_signature_v4): Refactor signer tests

531e864

chore: Update mono_repo config

39d7e14

dnys1 force-pushed the feat/signer branch from 6194257 to 39d7e14 Compare March 31, 2022 18:53

Dillon Nys and others added 4 commits April 13, 2022 08:01

chore(aws_signature_v4): Add web example

0164cac

chore(ci): Update mono_repo

8748e64

Merge branch 'main' into feat/signer

0839ea0

chore(aws_signature_v4): Add user agent header

d4bb436

dnys1 force-pushed the feat/signer branch from bb55b85 to d4bb436 Compare April 18, 2022 23:25

cshfang reviewed Apr 18, 2022

View reviewed changes

Dillon Nys added 3 commits April 18, 2022 17:57

chore(aws_signature_v4): Use x-amz-user-agent on web

cfb1464

chore(aws_signature_v4): Fix user agent signing in tests

5c94e5e

chore: Feedback and clean up

1d6d0d5

dnys1 force-pushed the feat/signer branch from d17ddcf to 1d6d0d5 Compare April 19, 2022 15:58

Dillon Nys added 2 commits April 19, 2022 10:22

chore(aws_common): Add HTTP response tests

86fd73e

chore(aws_common): Make default constructors use Uri

4580e3f

cshfang reviewed Apr 19, 2022

View reviewed changes

cshfang reviewed Apr 20, 2022

View reviewed changes

Dillon Nys and others added 4 commits April 19, 2022 17:27

chore: More feedback and comments

6a4d45f

Update packages/aws_signature_v4/lib/src/configuration/service_config…

b87816d

…uration.dart Co-authored-by: Chris F <5827964+cshfang@users.noreply.github.com>

chore(aws_signature_v4): Simplify logic

1deba24

chore(aws_signature_v4): Update test loading

58447f6

cshfang approved these changes Apr 21, 2022

View reviewed changes

HuiSF reviewed Apr 22, 2022

View reviewed changes

Dillon Nys added 2 commits April 22, 2022 15:04

chore: Resolve comments feedback

52e74d5

chore(aws): Add service enum

f763e80

HuiSF reviewed Apr 25, 2022

View reviewed changes

packages/aws_common/lib/src/config/aws_service.dart Show resolved Hide resolved

HuiSF reviewed Apr 25, 2022

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packages/aws_signature_v4/test/c_test_suite/request_parser.dart Outdated Show resolved Hide resolved

packages/aws_signature_v4/test/c_test_suite/request_parser.dart Outdated Show resolved Hide resolved

Dillon Nys added 2 commits April 25, 2022 11:58

chore(aws): PR feedback

60e3309

chore(aws_common): Remove JSON annotation

89915d7

HuiSF approved these changes Apr 26, 2022

View reviewed changes

dnys1 merged commit 3089b1a into aws-amplify:main Apr 26, 2022


		import 'testdata/multiple_chunks_testdata.dart';

		// From: https://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-streaming.html

		// This is required to ensure that `context.json` is the first file parsed,
		// since it's data is used to parse other files accordingly, namely `request.txt`.

		Stream<List<int>> get body =>
		bodyBytes.isEmpty ? const Stream.empty() : Stream.value(bodyBytes);

		@@ -0,0 +1 @@
		/test/

		@@ -0,0 +1 @@
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feat: AWS Signature V4 library #1456

feat: AWS Signature V4 library #1456

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dnys1 commented Mar 12, 2022

codecov-commenter commented Mar 12, 2022 • edited Loading

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codecov-commenter commented Mar 12, 2022 •

edited

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