Document how long presigned URLs from Storage.getUrl() are valid for

[gulmensedat]

Description

It works for a while without any problems, then it gives this error and doesn't shoot any images. This happens all the time in a loop. It works fine for half an hour and gives this error for half an hour.

Categories

• Analytics
• API (REST)
• API (GraphQL)
• Auth
• Authenticator
• DataStore
• Storage

Steps to Reproduce

final UploadFileResult result = await Amplify.Storage.uploadFile(
          local: File(imgFile.path),
          key: '$imgPath.jpg',
          options: S3UploadFileOptions(
            metadata: metadata,
            accessLevel: StorageAccessLevel.guest,
          ));

static Future<GetUrlResult> getUrlFile(String fileKey, {S3GetUrlOptions options}) async {
    try {
      final result = await Amplify.Storage.getUrl(
        key: fileKey,
        options: options,
      );

     // print('image url: ${result.url}');
      return result;
    } on StorageException catch (e) {
      print('error down file: $e');
    }
  }

widget

FutureBuilder(
              future: AmplifyStorage.getUrlFile(urlKey,
               options: S3GetUrlOptions(
                              accessLevel: amplifyFlutter.StorageAccessLevel.guest,
                              expires: 10000))),
              builder: (context, snapshot) {
                final result = snapshot.data;
                if (result == null) {
                  return const SizedBox();
                } else {
                  return CachedNetworkImage(
                    height: 290,
                    width: double.infinity,
                    fit: BoxFit.cover,
                    imageUrl: result.url,
                    cacheKey: urlKey,
                    errorWidget: (context, url, error) {
                      return const SizedBox();
                    },
                  );
                }
              },
            )

Screenshots

error

flutter: error down file: StorageException(message: Unexpected error occurred with message: Could not retreive AWS credentials, credential value is nil or empty., recoverySuggestion: This should not happen. There is a possibility that there is a bug if this error persists. Please take a look at https://github.com/aws-amplify/amplify-ios/issues to see if there are any existing issues that match your scenario, and file an issue with the details of the bug if there isn't. Issue encountered at:
file: /Users/sedat/Desktop/projeler/eapp/ios/Pods/Amplify/Amplify/Categories/Auth/Error/AuthError.swift
function: recoverySuggestion
line: 80, underlyingException: null)

Platforms

• iOS
• Android
• Web
• macOS
• Windows
• Linux

Android Device/Emulator API Level

No response

Environment

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.0.5, on macOS 12.4 21F79 darwin-x64, locale tr-TR)
[✓] Android toolchain - develop for Android devices (Android SDK version 32.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 13.4.1)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2020.3)
[!] Android Studio
    ✗ Android Studio not found at C:\Program Files\Android\Android Studio/Contents
[✓] VS Code (version 1.45.1)
[✓] VS Code (version 1.32.3)
[✓] VS Code (version 1.32.3)
[✓] Connected device (4 available)
    ! Error: Sedo is not connected. Xcode will continue when Sedo is connected. (code -13)
[✓] HTTP Host Availability

! Doctor found issues in 1 category.

Dependencies

flutter pub deps --no-dev --style=compact

Dart SDK 2.17.6
Flutter SDK 3.0.5
elimesaglikapp 1.0.0+1

dependencies:
- amplify_auth_cognito 0.6.4 [amplify_auth_cognito_android amplify_auth_cognito_ios amplify_core aws_common collection flutter meta plugin_platform_interface]
- amplify_flutter 0.6.4 [amplify_core amplify_datastore_plugin_interface amplify_flutter_android amplify_flutter_ios aws_common collection flutter meta plugin_platform_interface]
- amplify_storage_s3 0.6.4 [amplify_storage_s3_android amplify_storage_s3_ios amplify_core aws_common flutter meta plugin_platform_interface]
- cached_network_image 3.2.1 [flutter flutter_cache_manager octo_image cached_network_image_platform_interface cached_network_image_web]
- cloud_firestore 3.4.0 [cloud_firestore_platform_interface cloud_firestore_web collection firebase_core firebase_core_platform_interface flutter meta]
- cupertino_icons 1.0.5
- dots_indicator 2.1.0 [flutter]
- firebase_auth 3.5.0 [firebase_auth_platform_interface firebase_auth_web firebase_core firebase_core_platform_interface flutter meta]
- firebase_core 1.20.0 [firebase_core_platform_interface firebase_core_web flutter meta]
- flutter 0.0.0 [characters collection material_color_utilities meta vector_math sky_engine]
- flutter_screenutil 5.5.3+2 [flutter]
- get 4.6.5 [flutter]
- get_it 7.2.0 [async collection]
- heic_to_jpg 0.2.0 [flutter]
- image_picker 0.8.5+3 [flutter image_picker_android image_picker_for_web image_picker_ios image_picker_platform_interface]
- like_button 2.0.4 [flutter]
- path_provider 2.0.11 [flutter path_provider_android path_provider_ios path_provider_linux path_provider_macos path_provider_platform_interface path_provider_windows]
- permission_handler 10.0.0 [flutter meta permission_handler_android permission_handler_apple permission_handler_windows permission_handler_platform_interface]
- provider 6.0.3 [collection flutter nested]
- timeago 3.2.2

transitive dependencies:
- amplify_auth_cognito_android 0.6.4 [flutter]
- amplify_auth_cognito_ios 0.6.4 [amplify_core flutter]
- amplify_core 0.6.4 [aws_common collection flutter intl json_annotation meta plugin_platform_interface uuid]
- amplify_datastore_plugin_interface 0.6.4 [amplify_core collection flutter meta]
- amplify_flutter_android 0.6.4 [flutter]
- amplify_flutter_ios 0.6.4 [amplify_core flutter]
- amplify_storage_s3_android 0.6.4 [flutter]
- amplify_storage_s3_ios 0.6.4 [flutter]
- async 2.8.2 [collection meta]
- aws_common 0.1.1 [async collection http meta stream_transform uuid]
- boolean_selector 2.1.0 [source_span string_scanner]
- cached_network_image_platform_interface 1.0.0 [flutter flutter_cache_manager]
- cached_network_image_web 1.0.1 [flutter flutter_cache_manager cached_network_image_platform_interface]
- characters 1.2.0
- charcode 1.3.1
- clock 1.1.0
- cloud_firestore_platform_interface 5.7.0 [collection firebase_core flutter meta plugin_platform_interface]
- cloud_firestore_web 2.8.0 [cloud_firestore_platform_interface collection firebase_core firebase_core_web flutter flutter_web_plugins js]
- collection 1.16.0
- cross_file 0.3.3+1 [js meta]
- crypto 3.0.2 [typed_data]
- fake_async 1.3.0 [clock collection]
- ffi 2.0.1
- file 6.1.2 [meta path]
- firebase_auth_platform_interface 6.4.0 [collection firebase_core flutter meta plugin_platform_interface]
- firebase_auth_web 4.1.0 [firebase_auth_platform_interface firebase_core firebase_core_web flutter flutter_web_plugins http_parser intl js meta]
- firebase_core_platform_interface 4.5.0 [collection flutter flutter_test meta plugin_platform_interface]
- firebase_core_web 1.7.1 [firebase_core_platform_interface flutter flutter_web_plugins js meta]
- flutter_blurhash 0.7.0 [flutter]
- flutter_cache_manager 3.3.0 [clock collection file flutter http path path_provider pedantic rxdart sqflite uuid]
- flutter_plugin_android_lifecycle 2.0.7 [flutter]
- flutter_test 0.0.0 [flutter test_api path fake_async clock stack_trace vector_math async boolean_selector characters charcode collection matcher material_color_utilities meta source_span stream_channel string_scanner term_glyph]
- flutter_web_plugins 0.0.0 [flutter js characters collection material_color_utilities meta vector_math]
- http 0.13.4 [async http_parser meta path]
- http_parser 4.0.1 [collection source_span string_scanner typed_data]
- image_picker_android 0.8.5+1 [flutter flutter_plugin_android_lifecycle image_picker_platform_interface]
- image_picker_for_web 2.1.8 [flutter flutter_web_plugins image_picker_platform_interface]
- image_picker_ios 0.8.5+6 [flutter image_picker_platform_interface]
- image_picker_platform_interface 2.5.0 [cross_file flutter http plugin_platform_interface]
- intl 0.17.0 [clock path]
- js 0.6.4
- json_annotation 4.6.0 [meta]
- matcher 0.12.11 [stack_trace]
- material_color_utilities 0.1.4
- meta 1.7.0
- nested 1.0.0 [flutter]
- octo_image 1.0.2 [flutter flutter_blurhash]
- path 1.8.1
- path_provider_android 2.0.16 [flutter path_provider_platform_interface]
- path_provider_ios 2.0.10 [flutter path_provider_platform_interface]
- path_provider_linux 2.1.7 [ffi flutter path path_provider_platform_interface xdg_directories]
- path_provider_macos 2.0.6 [flutter path_provider_platform_interface]
- path_provider_platform_interface 2.0.4 [flutter platform plugin_platform_interface]
- path_provider_windows 2.1.0 [ffi flutter path path_provider_platform_interface win32]
- pedantic 1.11.1
- permission_handler_android 10.0.0 [flutter permission_handler_platform_interface]
- permission_handler_apple 9.0.4 [flutter permission_handler_platform_interface]
- permission_handler_platform_interface 3.7.0 [flutter meta plugin_platform_interface]
- permission_handler_windows 0.1.0 [flutter permission_handler_platform_interface]
- platform 3.1.0
- plugin_platform_interface 2.1.2 [meta]
- process 4.2.4 [file path platform]
- rxdart 0.27.5
- sky_engine 0.0.99
- source_span 1.8.2 [collection path term_glyph]
- sqflite 2.0.3 [flutter sqflite_common path]
- sqflite_common 2.2.1+1 [synchronized path meta]
- stack_trace 1.10.0 [path]
- stream_channel 2.1.0 [async]
- stream_transform 2.0.0
- string_scanner 1.1.0 [charcode source_span]
- synchronized 3.0.0+2
- term_glyph 1.2.0
- test_api 0.4.9 [async boolean_selector collection meta source_span stack_trace stream_channel string_scanner term_glyph matcher]
- typed_data 1.3.1 [collection]
- uuid 3.0.6 [crypto]
- vector_math 2.1.2
- win32 2.7.0 [ffi]
- xdg_directories 0.2.0+1 [meta path process]

Device

iPhone 12 Pro

OS

macOS 12.4

CLI Version

9.1.0

Additional Context

No response

[fjnoyp]

Thanks for your response here @dorontal

@gulmensedat can you also verify what storage access levels you've configured in your S3 bucket? When setting up with Amplify CLI did you follow the instructions listed here? => https://docs.amplify.aws/lib/storage/getting-started/q/platform/flutter/#provision-backend-storage

[fjnoyp]

Hi @gulmensedat any updates here?

[gulmensedat]

Hi @gulmensedat any updates here?

Using Streambuilder instead of Futurebuilder, I show the link of the image with CachedNetworkImage from my database, in case of an error with errorWidget, I send a request to refresh the link using the key address. That way I don't get this error. I have a problem when I use the above with FutureBuilder. As far as I understand, it is necessary to send a request with a key and download the image link.

[fjnoyp]

Hi @gulmensedat thank you for the followup. The problem you encountered might not be related to Streambuilder vs. Futurebuilder but to the fact that Storage.getUrl returns a presigned url from s3 which is only valid from 0-60 minutes. Not aware that this can be configured unfortunately.

Your fix seems to be a good way forward, as making a new request will refresh the link and get a new presigned url.

[fjnoyp]

We'll update the docs to make this behavior more clear. Thanks for taking the time to create this issue and share your process to resolution.