🐛 [cloud_firestore] Operation never completes when setting host to local for emulator - iOS

[tapizquent]

Bug report

Describe the bug When working with firestore emulator and setting the host to localhost, the operations performed never complete.

Steps to reproduce

Steps to reproduce the behavior:

1. Using any Flutter application, set the setting of Firestore as follows:

   
   String host = Platform.isAndroid ? '10.0.2.2:8080' : 'localhost:8080';

FirebaseFirestore.instance.settings = Settings( host: host, sslEnabled: false, persistenceEnabled: false, );

2. Start firebase firestore emulator `firebase emulators:start --only firestore`
3. Run any write operation such as `await FirebaseFirestore.instance.collection('test').doc().set({'test':'non-working'})`
4. See error or incorrect behavior. The operation never completes, neither fails nor returns. It just stays there.

### Expected behavior

The data should be written to the emulator.

---

## Additional context

Mind you that this is working if we remove the Settings configuration and leave it to use the real database.

---

### Flutter doctor

Run `flutter doctor` and paste the output below:

<details><summary>Click To Expand</summary>

[✓] Flutter (Channel stable, 1.22.5, on macOS 11.0.1 20B50 darwin-x64, locale en-US) • Flutter version 1.22.5 at /Users/josetapizquent/Projects/Tools/flutter • Framework revision 7891006299 (6 days ago), 2020-12-10 11:54:40 -0800 • Engine revision ae90085a84 • Dart version 2.10.4

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3) • Android SDK at /Users/josetapizquent/Library/Android/sdk • Platform android-30, build-tools 29.0.3 • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211) • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 12.2) • Xcode at /Applications/Xcode.app/Contents/Developer • Xcode 12.2, Build version 12B45b • CocoaPods version 1.9.1

[✓] Android Studio (version 3.6) • Android Studio at /Applications/Android Studio.app/Contents • Flutter plugin version 45.1.1 • Dart plugin version 192.8052 • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)

[✓] VS Code (version 1.52.0) • VS Code at /Applications/Visual Studio Code.app/Contents • Flutter extension version 3.17.0

[✓] Connected device (1 available) • TapPhone (mobile) • 00008020-000E58220E99002E • ios • iOS 14.2

• No issues found!

</details>

---

### Flutter dependencies

Run `flutter pub deps -- --style=compact` and paste the output below:

<details><summary>Click To Expand</summary>

Dart SDK 2.10.4 Flutter SDK 1.22.5 icay 1.0.0+2

dependencies:

• app_settings 3.0.1 [flutter]
• apple_sign_in 0.1.0 [flutter]
• auto_size_text 2.1.0 [flutter]
• barcode_scan 2.0.2 [flutter]
• bloc 6.1.1 [meta]
• cached_network_image 2.4.1 [flutter flutter_cache_manager octo_image]
• cloud_firestore 0.14.4 [flutter meta quiver firebase_core firebase_core_platform_interface cloud_firestore_platform_interface cloud_firestore_web]
• cupertino_icons 0.1.3
• device_info 0.4.2+10 [flutter device_info_platform_interface]
• enum_to_string 1.0.14
• equatable 1.2.5 [collection meta]
• firebase_admob 0.10.3 [meta flutter firebase_core]
• firebase_analytics 6.3.0 [meta flutter firebase_core firebase_analytics_web firebase_analytics_platform_interface]
• firebase_auth 0.18.4+1 [meta firebase_core firebase_core_platform_interface firebase_auth_platform_interface firebase_auth_web flutter]
• firebase_core 0.5.3 [firebase_core_platform_interface flutter quiver meta firebase_core_web]
• firebase_dynamic_links 0.5.0+12 [flutter]
• firebase_messaging 7.0.3 [meta flutter firebase_core]
• firebase_storage 5.2.0 [flutter firebase_core firebase_core_platform_interface firebase_storage_web firebase_storage_platform_interface quiver]
• flare_flutter 2.0.6 [flutter flare_dart meta]
• flash 1.3.1 [flutter]
• flutter 0.0.0 [characters collection meta typed_data vector_math sky_engine]
• flutter_bloc 6.1.1 [flutter bloc provider]
• flutter_cupertino_localizations 1.0.1 [flutter flutter_localizations]
• flutter_local_notifications 1.5.0+1 [flutter platform flutter_local_notifications_platform_interface]
• flutter_localizations 0.0.0 [flutter intl characters collection meta path typed_data vector_math]
• flutter_material_color_picker 1.0.5 [flutter]
• flutter_picker 1.1.3 [flutter]
• flutter_secure_storage 3.3.5 [meta flutter]
• global_configuration 1.6.0 [flutter http]
• google_sign_in 4.5.6 [google_sign_in_platform_interface flutter meta google_sign_in_web]
• http 0.12.2 [http_parser path pedantic]
• hydrated_bloc 6.1.0 [flutter meta bloc hive synchronized path_provider]
• icay_shared 0.0.1 [flutter equatable uuid quiver]
• image_cropper 1.3.1 [flutter]
• image_picker 0.6.7+15 [flutter flutter_plugin_android_lifecycle image_picker_platform_interface]
• intl 0.16.1 [path]
• keyboard_actions 3.3.1+1 [flutter]
• logger 0.8.3 [io]
• mailer 3.2.1 [async logging intl mime path pedantic]
• notification_permissions 0.4.8 [flutter]
• qr_flutter 3.2.0 [flutter qr]
• quiver 2.1.5 [matcher meta]
• rxdart 0.23.1
• sailor 0.7.1 [flutter]
• share 0.6.5+4 [meta mime flutter]
• shimmer 1.1.2 [flutter]
• sticky_headers 0.1.8+1 [flutter meta]
• strings 0.1.4 [characters unicode]
• url_launcher 5.7.10 [flutter url_launcher_platform_interface url_launcher_web url_launcher_linux url_launcher_macos url_launcher_windows]
• uuid 2.2.2 [crypto convert]
• youtube_player_flutter 7.0.0+7 [flutter flutter_inappwebview]

dev dependencies:

• bloc_test 7.1.0 [bloc test meta mockito]
• cloud_firestore_mocks 0.5.2+1 [flutter cloud_firestore cloud_firestore_platform_interface collection plugin_platform_interface mockito quiver]
• flutter_launcher_icons 0.7.5 [image args yaml]
• flutter_test 0.0.0 [flutter test_api path fake_async clock stack_trace vector_math async boolean_selector characters charcode collection matcher meta source_span stream_channel string_scanner term_glyph typed_data]
• intl_translation 0.17.10+1 [analyzer args dart_style intl path petitparser]
• mockito 4.1.3 [analyzer build code_builder collection dart_style matcher meta source_gen test_api]

transitive dependencies:

• _fe_analyzer_shared 7.0.0 [meta]
• analyzer 0.39.17 [_fe_analyzer_shared args charcode cli_util collection convert crypto glob html meta package_config path pub_semver source_span watcher yaml]
• archive 2.0.13 [crypto args path]
• args 1.6.0
• async 2.5.0-nullsafety.1 [collection]
• boolean_selector 2.1.0-nullsafety.1 [source_span string_scanner]
• build 1.6.0 [analyzer async convert crypto logging meta path glob]
• built_collection 4.3.2 [collection quiver]
• built_value 7.1.0 [built_collection collection fixnum quiver]
• characters 1.1.0-nullsafety.3
• charcode 1.2.0-nullsafety.1
• cli_util 0.2.0 [path]
• clock 1.1.0-nullsafety.1
• cloud_firestore_platform_interface 2.2.1 [flutter meta collection firebase_core plugin_platform_interface]
• cloud_firestore_web 0.2.1+2 [flutter flutter_web_plugins http_parser meta firebase_core firebase_core_web cloud_firestore_platform_interface js]
• code_builder 3.5.0 [built_collection built_value collection matcher meta]
• collection 1.15.0-nullsafety.3
• convert 2.1.1 [charcode typed_data]
• coverage 0.14.2 [args logging package_config path source_maps stack_trace vm_service]
• crypto 2.1.5 [collection convert typed_data]
• csslib 0.16.2 [source_span]
• dart_style 1.3.6 [analyzer args path source_span]
• device_info_platform_interface 1.0.1 [flutter meta plugin_platform_interface]
• fake_async 1.2.0-nullsafety.1 [clock collection]
• ffi 0.1.3
• file 5.2.1 [intl meta path]
• firebase 7.3.3 [http http_parser js]
• firebase_analytics_platform_interface 1.0.3 [flutter meta]
• firebase_analytics_web 0.1.1 [flutter flutter_web_plugins firebase firebase_analytics_platform_interface meta]
• firebase_auth_platform_interface 2.1.4 [flutter meta firebase_core plugin_platform_interface]
• firebase_auth_web 0.3.2+3 [flutter flutter_web_plugins meta http_parser intl firebase_core firebase_core_web firebase_auth_platform_interface js]
• firebase_core_platform_interface 2.1.0 [flutter meta plugin_platform_interface quiver]
• firebase_core_web 0.2.1+1 [firebase_core_platform_interface flutter flutter_web_plugins meta js]
• firebase_storage_platform_interface 1.0.2 [flutter meta collection firebase_core plugin_platform_interface]
• firebase_storage_web 0.1.1+1 [async crypto firebase_core firebase_core_web firebase_storage_platform_interface flutter flutter_web_plugins http js meta]
• fixnum 0.10.11
• flare_dart 2.3.4
• flutter_blurhash 0.5.0 [flutter meta]
• flutter_cache_manager 2.0.0 [flutter path_provider uuid http path sqflite pedantic clock file rxdart]
• flutter_inappwebview 4.0.0+4 [flutter uuid mime]
• flutter_local_notifications_platform_interface 1.0.1 [flutter plugin_platform_interface]
• flutter_plugin_android_lifecycle 1.0.11 [flutter]
• flutter_web_plugins 0.0.0 [flutter characters collection meta typed_data vector_math]
• glob 1.2.0 [async collection node_io path pedantic string_scanner]
• google_sign_in_platform_interface 1.1.2 [flutter meta quiver]
• google_sign_in_web 0.9.2 [google_sign_in_platform_interface flutter flutter_web_plugins meta js]
• hive 1.4.4+1 [meta crypto]
• html 0.14.0+4 [csslib source_span]
• http_multi_server 2.2.0 [async]
• http_parser 3.1.4 [charcode collection source_span string_scanner typed_data]
• image 2.1.19 [archive xml meta]
• image_picker_platform_interface 1.1.1 [flutter meta http plugin_platform_interface]
• io 0.3.4 [charcode meta path string_scanner]
• js 0.6.3-nullsafety.2
• lists 0.1.6
• logging 0.11.4
• matcher 0.12.10-nullsafety.1 [stack_trace]
• meta 1.3.0-nullsafety.3
• mime 0.9.7
• nested 0.0.4 [flutter]
• node_interop 1.2.1 [js]
• node_io 1.2.0 [file node_interop path]
• node_preamble 1.4.12
• octo_image 0.3.0 [flutter flutter_blurhash]
• package_config 1.9.3 [path charcode]
• path 1.8.0-nullsafety.1
• path_provider 1.6.24 [flutter path_provider_platform_interface path_provider_macos path_provider_linux path_provider_windows]
• path_provider_linux 0.0.1+2 [path xdg_directories path_provider_platform_interface flutter]
• path_provider_macos 0.0.4+6 [flutter]
• path_provider_platform_interface 1.0.4 [flutter meta platform plugin_platform_interface]
• path_provider_windows 0.0.4+3 [path_provider_platform_interface meta path flutter ffi win32]
• pedantic 1.10.0-nullsafety.2
• petitparser 3.1.0 [meta]
• platform 2.2.1
• plugin_platform_interface 1.0.3 [meta]
• pool 1.5.0-nullsafety.2 [async stack_trace]
• process 3.0.13 [file intl meta path platform]
• provider 4.3.2+3 [collection flutter nested]
• pub_semver 1.4.4 [collection]
• qr 1.3.0 [meta]
• shelf 0.7.9 [async collection http_parser path stack_trace stream_channel]
• shelf_packages_handler 2.0.0 [path shelf shelf_static]
• shelf_static 0.2.8 [convert http_parser mime path shelf]
• shelf_web_socket 0.2.3 [shelf web_socket_channel stream_channel]
• sky_engine 0.0.99
• source_gen 0.9.10+1 [analyzer async build dart_style glob meta path pedantic source_span]
• source_map_stack_trace 2.1.0-nullsafety.3 [path stack_trace source_maps]
• source_maps 0.10.10-nullsafety.2 [source_span]
• source_span 1.8.0-nullsafety.2 [charcode collection path term_glyph]
• sqflite 1.3.2+1 [flutter sqflite_common path]
• sqflite_common 1.0.2+1 [synchronized path meta]
• stack_trace 1.10.0-nullsafety.1 [path]
• stream_channel 2.1.0-nullsafety.1 [async]
• string_scanner 1.1.0-nullsafety.1 [charcode source_span]
• synchronized 2.2.0+2
• term_glyph 1.2.0-nullsafety.1
• test 1.16.0-nullsafety.5 [analyzer async boolean_selector coverage http http_multi_server io js node_preamble package_config path pedantic pool shelf shelf_packages_handler shelf_static shelf_web_socket source_span stack_trace stream_channel typed_data web_socket_channel webkit_inspection_protocol yaml test_api test_core]
• test_api 0.2.19-nullsafety.2 [async boolean_selector collection meta path source_span stack_trace stream_channel string_scanner term_glyph matcher]
• test_core 0.3.12-nullsafety.5 [analyzer async args boolean_selector collection coverage glob io meta package_config path pedantic pool source_map_stack_trace source_maps source_span stack_trace stream_channel vm_service yaml matcher test_api]
• typed_data 1.3.0-nullsafety.3 [collection]
• unicode 0.2.4 [lists]
• url_launcher_linux 0.0.1+4 [flutter]
• url_launcher_macos 0.0.1+9 [flutter]
• url_launcher_platform_interface 1.0.9 [flutter meta plugin_platform_interface]
• url_launcher_web 0.1.5+1 [url_launcher_platform_interface flutter flutter_web_plugins meta]
• url_launcher_windows 0.0.1+3 [flutter]
• vector_math 2.1.0-nullsafety.3
• vm_service 5.5.0 [meta]
• watcher 0.9.7+15 [async path pedantic]
• web_socket_channel 1.1.0 [async crypto stream_channel]
• webkit_inspection_protocol 0.7.4 [logging]
• win32 1.7.4 [ffi]
• xdg_directories 0.1.2 [meta path process]
• xml 4.5.1 [collection convert meta petitparser]
• yaml 2.2.1 [charcode collection string_scanner source_span]

---

[markusaksli-nc]

I can't reproduce this on the latest master 1.26.0-2.0.pre.64 with cloud_firestore: ^0.14.4.

flutter doctor -v

``` [√] Flutter (Channel master, 1.26.0-2.0.pre.64, on Microsoft Windows [Version 10.0.19041.685], locale et-EE) • Flutter version 1.26.0-2.0.pre.64 at C:\Development\flutter_master • Framework revision 9ff4326e1f (4 hours ago), 2020-12-17 06:19:05 +0000 • Engine revision 6edb402ee4 • Dart version 2.12.0 (build 2.12.0-157.0.dev) [√] Android toolchain - develop for Android devices (Android SDK version 30.0.2) • Android SDK at C:\Users\marku\AppData\Local\Android\sdk • Platform android-30, build-tools 30.0.2 • Java binary at: C:\Users\marku\AppData\Local\JetBrains\Toolbox\apps\AndroidStudio\ch-0\201.6953283\jre\bin\java • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01) • All Android licenses accepted. [√] Chrome - develop for the web • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe [√] Visual Studio - develop for Windows (Visual Studio Community 2019 16.7.7) • Visual Studio at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community • Visual Studio Community 2019 version 16.7.30621.155 • Windows 10 SDK version 10.0.18362.0 [√] Android Studio (version 4.1.0) • Android Studio at C:\Users\marku\AppData\Local\JetBrains\Toolbox\apps\AndroidStudio\ch-0\201.6953283 • Flutter plugin can be installed from: https://plugins.jetbrains.com/plugin/9212-flutter • Dart plugin can be installed from: https://plugins.jetbrains.com/plugin/6351-dart • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01) [√] IntelliJ IDEA Ultimate Edition (version 2020.3) • IntelliJ at C:\Users\marku\AppData\Local\JetBrains\Toolbox\apps\IDEA-U\ch-0\203.5981.155 • Flutter plugin can be installed from: https://plugins.jetbrains.com/plugin/9212-flutter • Dart plugin can be installed from: https://plugins.jetbrains.com/plugin/6351-dart [√] Connected device (4 available) • sdk gphone x86 arm (mobile) • emulator-5554 • android-x86 • Android 11 (API 30) (emulator) • Windows (desktop) • windows • windows-x64 • Microsoft Windows [Version 10.0.19041.685] • Chrome (web) • chrome • web-javascript • Google Chrome 87.0.4280.88 • Edge (web) • edge • web-javascript • Microsoft Edge 87.0.664.60 • No issues found! ```

Code sample

```dart import 'dart:io'; import 'package:cloud_firestore/cloud_firestore.dart'; import 'package:firebase_core/firebase_core.dart'; import 'package:flutter/material.dart'; void main() async { WidgetsFlutterBinding.ensureInitialized(); FirebaseApp app = await Firebase.initializeApp(); assert(app != null); String host = Platform.isAndroid ? '10.0.2.2:8080' : 'localhost:8080'; FirebaseFirestore.instance.settings = Settings( host: host, sslEnabled: false, persistenceEnabled: false, ); runApp(MyApp()); } class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( debugShowCheckedModeBanner: false, title: 'Material App', theme: ThemeData.dark(), home: Scaffold( appBar: AppBar( title: const Text('Sample'), ), body: Column( mainAxisAlignment: MainAxisAlignment.spaceEvenly, crossAxisAlignment: CrossAxisAlignment.stretch, children: [ RaisedButton( child: const Text("Set"), onPressed: () async { print('start'); await FirebaseFirestore.instance.collection('test').doc('testDoc').set({'test': 'non-working'}).catchError((e,s) => print('$e\n$s')); print('end'); }, ), RaisedButton( child: const Text("Get"), onPressed: () async { print('start'); var doc = await FirebaseFirestore.instance.collection('test').doc('testDoc').get(); print(doc.data()); }, ), ], ), ), ); } } ```

Can you reproduce this with this code sample? What version of the firebase CLI are you using? Thank you

[tapizquent]

Unfortunately this does not work. I replaced my whole main.dart with your code sample, and as I previously mentioned, it prints start and then stays there. Nothing gets written to the database and end does not print.

I am currently on the latest stable channel as I cannot afford to be in master channel with this project.

I am running this project in a physical iOS device running iOS 14.2

I just updated to the latest firebase tools by using npm install -g firebase-tools

And the output is:

npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
npm WARN deprecated har-validator@5.1.5: this library is no longer supported
/usr/local/bin/firebase -> /usr/local/lib/node_modules/firebase-tools/lib/bin/firebase.js
+ firebase-tools@9.0.1
updated 1 package in 22.887s

So I believe the CLI version is 9.0.1

I retried your code sample after updating and it still does not work.

UPDATE:

After poking around and trying out different devices, I realized this works on Android (I tried in the Android emulator) but does NOT work on iOS. I tried both a physical device and the iOS Simulator and it stays without resolving.

[markusaksli-nc]

I'm not seeing this on iOS simulator either. Was not able to connect to the emulator on physical due to some connection issue but it seemed to be working just fine on simulator.

flutter doctor -v

``` [✓] Flutter (Channel master, 1.26.0-2.0.pre.84, on macOS 11.0.1 20B29 darwin-x64, locale en-GB) • Flutter version 1.26.0-2.0.pre.84 at /Users/markus/development/flutter_master • Framework revision cda1fae6b6 (4 hours ago), 2020-12-18 04:04:02 -0500 • Engine revision 1be6f414e7 • Dart version 2.12.0 (build 2.12.0-166.0.dev) [✓] Android toolchain - develop for Android devices (Android SDK version 30.0.1) • Android SDK at /Users/markus/Library/Android/sdk • Platform android-30, build-tools 30.0.1 • Java binary at: /Users/markus/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/201.6953283/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495) • All Android licenses accepted. [✓] Xcode - develop for iOS and macOS (Xcode 12.2) • Xcode at /Applications/Xcode.app/Contents/Developer • Xcode 12.2, Build version 12B45b • CocoaPods version 1.10.0 [✓] Chrome - develop for the web • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome [✓] Android Studio (version 4.1) • Android Studio at /Users/markus/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/201.6953283/Android Studio.app/Contents • Flutter plugin can be installed from: � https://plugins.jetbrains.com/plugin/9212-flutter • Dart plugin can be installed from: � https://plugins.jetbrains.com/plugin/6351-dart • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495) [✓] Connected device (4 available) • Nevercode’s iPhone (mobile) • b668e524315069f3db3661ac11ff1f66afafebdb • ios • iOS 14.2 • iPhone 12 Pro Max (mobile) • CBF5C2A0-A408-4AED-A3DB-B385136B29FA • ios • com.apple.CoreSimulator.SimRuntime.iOS-14-2 (simulator) • macOS (desktop) • macos • darwin-x64 • macOS 11.0.1 20B29 darwin-x64 • Chrome (web) • chrome • web-javascript • Google Chrome 87.0.4280.67 • No issues found! ```

Is nothing logged to flutter run -v or Xcode console if you wait during the operation?

[tapizquent]

Upon trying again, it does seem to be working now. Maybe an temporary error with Xcode or Firebase that was preventing it from connecting to the local?

Anyways, it works now. Thank you!