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FormatException if EventSource does not contain valid utf8 #22

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neokree opened this issue Sep 22, 2021 · 1 comment · May be fixed by #23
Open

FormatException if EventSource does not contain valid utf8 #22

neokree opened this issue Sep 22, 2021 · 1 comment · May be fixed by #23

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@neokree
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neokree commented Sep 22, 2021

Hello,

I have an external API that is returning me an EventStream with a JSON content, but it seems like they are returning an invalid utf8, since when connecting to it I have this error the majority of events.

Unhandled Exception: FormatException: Missing extension byte (at offset 7291)
E/flutter (12039): #0      _Utf8Decoder.convertChunked (dart:convert-patch/convert_patch.dart:1887:7)
E/flutter (12039): #1      _Utf8ConversionSink.addSlice (dart:convert/string_conversion.dart:314:28)
E/flutter (12039): #2      _Utf8ConversionSink.add (dart:convert/string_conversion.dart:310:5)
E/flutter (12039): #3      _ConverterStreamEventSink.add (dart:convert/chunked_conversion.dart:72:18)
E/flutter (12039): #4      _SinkTransformerStreamSubscription._handleData (dart:async/stream_transformers.dart:121:24)
E/flutter (12039): #5      _rootRunUnary (dart:async/zone.dart:1198:47)
E/flutter (12039): #6      _CustomZone.runUnary (dart:async/zone.dart:1100:19)
E/flutter (12039): #7      _CustomZone.runUnaryGuarded (dart:async/zone.dart:1005:7)
E/flutter (12039): #8      _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:357:11)
E/flutter (12039): #9      _BufferingStreamSubscription._add (dart:async/stream_impl.dart:285:7)
E/flutter (12039): #10     _ForwardingStreamSubscription._add (dart:async/stream_pipe.dart:127:11)
E/flutter (12039): #11     _HandleErrorStream._handleData (dart:async/stream_pipe.dart:266:10)
E/flutter (12039): #12     _ForwardingStreamSubscription._handleData (dart:async/stream_pipe.dart:157:13)
E/flutter (12039): #13     _rootRunUnary (dart:async/zone.dart:1198:47)
E/flutter (12039): #14     _CustomZone.runUnary (dart:async/zone.dart:1100:19)
E/flutter (12039): #15     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1005:7)
E/flutter (12039): #16     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:357:11)
E/flutter (12039): #17     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:285:7)
E/flutter (12039): #18     _ForwardingStreamSubscription._add (dart:async/stream_pipe.dart:127:11)
E/flutter (12039): #19     _HandleErrorStream._handleData (dart:async/stream_pipe.dart:266:10)
E/flutter (12039): #20     _ForwardingStreamSubscription._handleData (dart:async/stream_pipe.dart:157:13)
E/flutter (12039): #21     _rootRunUnary (dart:async/zone.dart:1198:47)
E/flutter (12039): #22     _CustomZone.runUnary (dart:async/zone.dart:1100:19)
E/flutter (12039): #23     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1005:7)
E/flutter (12039): #24     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:357:11)
E/flutter (12039): #25     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:285:7)
E/flutter (12039): #26     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:808:19)
E/flutter (12039): #27     _StreamController._add (dart:async/stream_controller.dart:682:7)
E/flutter (12039): #28     _StreamController.add (dart:async/stream_controller.dart:624:5)
E/flutter (12039): #29     _HttpParser._doParse (dart:_http/http_parser.dart:809:28)
E/flutter (12039): #30     _HttpParser._parse (dart:_http/http_parser.dart:324:7)
E/flutter (12039): #31     _HttpParser._onData (dart:_http/http_parser.dart:853:5)
E/flutter (12039): #32     _rootRunUnary (dart:async/zone.dart:1198:47)
E/flutter (12039): #33     _CustomZone.runUnary (dart:async/zone.dart:1100:19)
E/flutter (12039): #34     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1005:7)
E/flutter (12039): #35     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:357:11)
E/flutter (12039): #36     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:285:7)
E/flutter (12039): #37     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:808:19)
E/flutter (12039): #38     _StreamController._add (dart:async/stream_controller.dart:682:7)
E/flutter (12039): #39     _StreamController.add (dart:async/stream_controller.dart:624:5)
E/flutter (12039): #40     _Socket._onData (dart:io-patch/socket_patch.dart:2044:41)
E/flutter (12039): #41     _rootRunUnary (dart:async/zone.dart:1198:47)
E/flutter (12039): #42     _CustomZone.runUnary (dart:async/zone.dart:1100:19)
E/flutter (12039): #43     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1005:7)
E/flutter (12039): #44     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:357:11)
E/flutter (12039): #45     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:285:7)
E/flutter (12039): #46     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:808:19)
E/flutter (12039): #47     _StreamController._add (dart:async/stream_controller.dart:682:7)
E/flutter (12039): #48     _StreamController.add (dart:async/stream_controller.dart:624:5)
E/flutter (12039): #49     _RawSecureSocket._sendReadEvent (dart:io/secure_socket.dart:1002:19)
E/flutter (12039): #50     _rootRun (dart:async/zone.dart:1182:47)
E/flutter (12039): #51     _CustomZone.run (dart:async/zone.dart:1093:19)
E/flutter (12039): #52     _CustomZone.runGuarded (dart:async/zone.dart:997:7)
E/flutter (12039): #53     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:1037:23)
E/flutter (12039): #54     _rootRun (dart

It would be great if there could be a way to allow invalid UTF8 characters in the Event.data.
@neokree neokree linked a pull request Sep 22, 2021 that will close this issue
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@stevenroose
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Is there more demand than just you for non-utf8 streams? UTF8 is the recommended encoding for JSON.

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Add option to allow malformed utf8 in EventSource stream neokree/dart-eventsource
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@stevenroose @neokree