🐛 Bug Report: FormatException: Invalid HTTP header field value

[Evgentret]

👟 Reproduction steps

After updating to Dart 3.7 had error with database.listDocuments, running as console app

👍 Expected behavior

Get a valid response as I did yesterday (Same code on previous version of Dart works fine)

👎 Actual Behavior

"FormatException: Invalid HTTP header field value: "AppwriteDartSDK/13.0.0 (windows; "Майкрософт Windows 10 Домашняя для одного языка" 10.0 (Build 19045))" (at character 35)"
AppwriteDartSDK/13.0.0 (windows; "Майкрософт Windows 10 Домашняя для одного...
^

🎲 Appwrite version

Different version (specify in environment)

💻 Operating system

Windows

🧱 Your Environment

Appwrite version 1.6.0 on self-hosted Linux VPS, dart_appwrite: 13.0.0

👀 Have you spent some time to check if this issue has been raised before?

• I checked and didn't find similar issue

🏢 Have you read the Code of Conduct?

• I have read the Code of Conduct

[ChiragAgg5k]

@Evgentret From the error, it seems like you are passing invalid characters in your User-Agent header in the request, "Майкрософт Windows 10 Домашняя для одного языка" the header contains Cyrillic characters which aren't allowed in HTTP headers.

Can you please the snippet of the code that is leading to this error?

Also can you confirm if switching the language to English makes it work?

[Evgentret]

@Evgentret From the error, it seems like you are passing invalid characters in your User-Agent header in the request, "Майкрософт Windows 10 Домашняя для одного языка" the header contains Cyrillic characters which aren't allowed in HTTP headers.

Can you please the snippet of the code that is leading to this error?

Also can you confirm if switching the language to English makes it work?

This is code snippet that raise error:

import 'package:dart_appwrite/dart_appwrite.dart' as app;

...
  app.Client client = app.Client();
  late app.Databases database;
...
    client
        .setEndpoint(uEndpoint)
        .setProject(uProject)
        . setKey(uToken );
    database = app.Databases(client);

...

 try {
      var docs = await database.listDocuments(databaseId: uDBID,
          collectionId: uUser, queries: [app.Query.equal('tgId', id)]);
      if (docs.total>0) {
        user = UserModel.fromDoc(docs.documents.first);
      } else {
        await database.createDocument(databaseId: uDBID,
            collectionId: uUser, documentId: uid, data: user.toJson());
      }
    } on Exception catch (e) {
      print ('error on getting user $e');
    }

That's all. This code work well on previous dart version. I didn't set any headers (I think that SDK don't allowed it), I can't switch language. I just run the code as I ran it before Dart upgrade

[ChiragAgg5k]

@Evgentret thanks for sharing this! since the issue arised after updating of dart and not the sdk, can you confirm if downgrading the dart version fixes it?

[Evgentret]

@Evgentret thanks for sharing this! since the issue arised after updating of dart and not the sdk, can you confirm if downgrading the dart version fixes it?

Yes. Right now I clone flutter 3.27.3, herer is:

PS C:\flutter> flutter doctor -v
[!] Flutter (Channel [user-branch], 3.27.3, on Microsoft Windows [Version 10.0.19045.5487], locale ru-RU)
! Flutter version 3.27.3 on channel [user-branch] at C:\flutter
Currently on an unknown channel. Run flutter channel to switch to an official channel.
If that doesn't fix the issue, reinstall Flutter by following instructions at https://flutter.dev/setup.
! Upstream repository unknown source is not a standard remote.
Set environment variable "FLUTTER_GIT_URL" to unknown source to dismiss this error.
• Framework revision c519ee916e (4 weeks ago), 2025-01-21 10:32:23 -0800
• Engine revision e672b006cb
• Dart version 3.6.1
• DevTools version 2.40.2

All working best. Sorry, I don't know how to show you this, because just no errors and code works as it should

[Evgentret]

@Evgentret thanks for sharing this! since the issue arised after updating of dart and not the sdk, can you confirm if downgrading the dart version fixes it?

And come back again:

PS C:\flutter> flutter doctor -v
[√] Flutter (Channel stable, 3.29.0, on Microsoft Windows [Version 10.0.19045.5487], locale ru-RU) [918ms]
• Flutter version 3.29.0 on channel stable at C:\flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 35c388afb5 (10 days ago), 2025-02-10 12:48:41 -0800
• Engine revision f73bfc4522
• Dart version 3.7.0
• DevTools version 2.42.2

:

AppwriteException: , FormatException: Invalid HTTP header field value: "AppwriteDartSDK/13.0.0 (windows; "Майкрософт Windows 10 Домашняя для одного языка" 10.0 (Build 19045))" (at character 35)
AppwriteDartSDK/13.0.0 (windows; "Майкрософт Windows 10 Домашняя для одного...

So, issue only with new dart version

[ChiragAgg5k]

@Evgentret Thanks for sharing this! I have raised the issue to the internal team to look into it further

[ChiragAgg5k]

@Evgentret in the meanwhile while we look into it, a fix i can suggest for now would be to manually set the user-agent field using Client#addHeader

[stnguyen90]

What's Platform.operatingSystem on both the version on flutter?

[Evgentret]

What's Platform.operatingSystem on both the version on flutter?

windows

[ChiragAgg5k]

should be fixed with latest version