Failed to parse HTTP, 32 is expected to be a Hex digit

[amitjangid80]

Trying to make api call from flutter using http package but getting this error...the api is doesn't require any custom headers or configuration. And it's not even blocked at firewall level...The logs of the apis say that the request is received and response is also sent from their end, but I'm not able to receive the response. It failing before I get it...and getting this error...tried finding a solution for this but no luck...does anyone have any idea related to this error?

Failed to parse HTTP, 32 is expected to be a Hex digit IOClient.send. (package:http/src/io_client.dart:54:13) _invokeErrorHandler (dart:async/async_error.dart:45:24) _HandleErrorStream._handleError (dart:async/stream_pipe.dart:269:9) _ForwardingStreamSubscription._handleError (dart:async/stream_pipe.dart:157:13) _HttpClientResponse.listen. (dart:_http/http_impl.dart:709:16) _rootRunBinary (dart:async/zone.dart:1452:47) _CustomZone.runBinary (dart:async/zone.dart:1342:19) _CustomZone.runBinaryGuarded (dart:async/zone.dart:1252:7) _BufferingStreamSubscription._sendError.sendError (dart:async/stream_impl.dart:360:15) _BufferingStreamSubscription._sendError (dart:async/stream_impl.dart:378:7) _BufferingStreamSubscription._addError (dart:async/stream_impl.dart:280:7) _SinkTransformerStreamSubscription._addError (dart:async/stream_transformers.dart:75:11) _EventSinkWrapper.addError (dart:async/stream_transformers.dart:17:11) _ConverterStreamEventSink.addError (dart:convert/chunked_conversion.dart:77:16) _SinkTransformerStreamSubscription._handleError (dart:async/stream_transformers.dart:119:24) _rootRunBinary (dart:async/zone.dart:1452:47) _CustomZone.runBinary (dart:async/zone.dart:1342:19) _CustomZone.runBinaryGuarded (dart:async/zone.dart:1252:7) _BufferingStreamSubscription._sendError.sendError (dart:async/stream_impl.dart:360:15) _BufferingStreamSubscription._sendError (dart:async/stream_impl.dart:378:7) _BufferingStreamSubscription._addError (dart:async/stream_impl.dart:280:7) _SinkTransformerStreamSubscription._addError (dart:async/stream_transformers.dart:75:11) _EventSinkWrapper.addError (dart:async/stream_transformers.dart:17:11) _ConverterStreamEventSink.addError (dart:convert/chunked_conversion.dart:77:16) _SinkTransformerStreamSubscription._handleError (dart:async/stream_transformers.dart:119:24) _rootRunBinary (dart:async/zone.dart:1452:47) _CustomZone.runBinary (dart:async/zone.dart:1342:19) _CustomZone.runBinaryGuarded (dart:async/zone.dart:1252:7) _BufferingStreamSubscription._sendError.sendError (dart:async/stream_impl.dart:360:15) _BufferingStreamSubscription._sendError (dart:async/stream_impl.dart:378:7) _BufferingStreamSubscription._addError (dart:async/stream_impl.dart:280:7) _ForwardingStreamSubscription._addError (dart:async/stream_pipe.dart:128:11) _addErrorWithReplacement (dart:async/stream_pipe.dart:176:8) _HandleErrorStream._handleError (dart:async/stream_pipe.dart:274:11) _ForwardingStreamSubscription._handleError (dart:async/stream_pipe.dart:157:13) _rootRunBinary (dart:async/zone.dart:1452:47) _CustomZone.runBinary (dart:async/zone.dart:1342:19) _CustomZone.runBinaryGuarded (dart:async/zone.dart:1252:7) _BufferingStreamSubscription._sendError.sendError (dart:async/stream_impl.dart:360:15) _BufferingStreamSubscription._sendError (dart:async/stream_impl.dart:378:7) _DelayedError.perform (dart:async/stream_impl.dart:602:14) _StreamImplEvents.handleNext (dart:async/stream_impl.dart:706:11) _PendingEvents.schedule. (dart:async/stream_impl.dart:663:7) _rootRun (dart:async/zone.dart:1420:47) _CustomZone.run (dart:async/zone.dart:1328:19) _CustomZone.runGuarded (dart:async/zone.dart:1236:7) _CustomZone.bindCallbackGuarded. (dart:async/zone.dart:1276:23) _rootRun (dart:async/zone.dart:1428:13) _CustomZone.run (dart:async/zone.dart:1328:19) _CustomZone.runGuarded (dart:async/zone.dart:1236:7) _CustomZone.bindCallbackGuarded. (dart:async/zone.dart:1276:23) _microtaskLoop (dart:async/schedule_microtask.dart:40:21) _startMicrotaskLoop (dart:async/schedule_microtask.dart:49:5)

flutter doctor -v

[✓] Flutter (Channel stable, 2.8.1, on macOS 12.2.1 21D62 darwin-x64, locale en-IN) • Flutter version 2.8.1 at /Users/username/flutter • Upstream repository https://github.com/flutter/flutter.git • Framework revision 77d935af4d (10 weeks ago), 2021-12-16 08:37:33 -0800 • Engine revision 890a5fca2e • Dart version 2.15.1

[✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0) • Android SDK at /Users/username/Library/Android/sdk • Platform android-31, build-tools 31.0.0 • ANDROID_HOME = /Users/username/Library/Android/sdk • ANDROID_SDK_ROOT = /Users/username/Library/Android/sdk • Java binary at: /Applications/Android Studio.app/Contents/jre/Contents/Home/bin/java • Java version OpenJDK Runtime Environment (build 11.0.11+0-b60-7590822) • All Android licenses accepted.

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[✓] Connected device (3 available) • Moto G 5S Plus (mobile) • ZY322CD7TF • android-arm • Android 8.1.0 (API 27) • macOS (desktop) • macos • darwin-x64 • macOS 12.2.1 21D62 darwin-x64 • Chrome (web) • chrome • web-javascript • Google Chrome 98.0.4758.102

• No issues found!

[manandharsudhir]

i am also having the same problem can someone help with it

[tAibar]

I ran into this issue too

This issue occurs when the response header contains Transfer-Encoding: chunked

and chunk size contains Space. e.g. 13 {CR}{LF}←Space(ascii code:0x20) before {CR}

If there is space when getting the chunk size an exception is thrown https://github.com/dart-lang/sdk/blob/13c4ad23c5947c661a7b8ab125d16bdf144197ab/sdk/lib/_http/http_parser.dart#L1055