flutter data_error ai_generated partial

FormatException: Invalid UTF-8 byte sequence in JSON

ID: flutter/formatexception-invalid-json-utf8

Also available as: JSON · Markdown · 中文

75%Fix Rate

82%Confidence

1Evidence

2024-01-10First Seen

Version Compatibility

Version	Status	Introduced	Deprecated	Notes
Dart 3.0	active	—	—	—
Dart 3.2	active	—	—	—
Flutter 3.16	active	—	—	—

A JSON response or file contains malformed UTF-8 bytes that Dart's utf8 decoder cannot parse, often due to corrupted data or encoding mismatch.

generic

JSON 响应或文件包含 Dart 的 utf8 解码器无法解析的损坏 UTF-8 字节，通常是由于数据损坏或编码不匹配。

80% success Use a forgiving UTF-8 decoder that replaces invalid sequences, such as utf8.decode with allowMalformed: true, then parse the cleaned string as JSON.
```
Use a forgiving UTF-8 decoder that replaces invalid sequences, such as utf8.decode with allowMalformed: true, then parse the cleaned string as JSON.
```
70% success Validate and sanitize the input at the network layer: log the raw bytes, then request the server to fix the encoding or use a fallback endpoint.
```
Validate and sanitize the input at the network layer: log the raw bytes, then request the server to fix the encoding or use a fallback endpoint.
```

Use a forgiving UTF-8 decoder that replaces invalid sequences, such as utf8.decode with allowMalformed: true, then parse the cleaned string as JSON.

Validate and sanitize the input at the network layer: log the raw bytes, then request the server to fix the encoding or use a fallback endpoint.

Common approaches that don't work:

70% fail
Silently drops data; the app continues with incomplete information, potentially causing downstream null errors or logic bugs.
85% fail
utf8.encode expects valid strings; if the input is already corrupted, it will throw the same error or produce garbage.
65% fail
Does not fix the underlying encoding issue; if the data is fundamentally corrupted, retrying will produce the same error.