No. Invalid input is invalid input, and there's no way to fix that
since it is literally not known what character there might be.
Consider that UTF-8 encoding allows different byte lengths so it is
not just one character that could be wrong but one or two
of following ones.
What you can do is, in order of preference:
1) Fix (or tell someone else to fix) whatever is producing invalid
content. That code is broken.
2) Use a single-byte encoding like ISO-8859-1 (latin-1) -- or one of
other 8859-x encodings -- to decode.
You have to construct your own `InputStreamReader` with encoding
of your choice. You can then pass that content
3) Pre-process content using some other mechanism (custom
InputStreamReader; use JDK's mechanisms that may opt to
speculatively give 0xFFFE marker) to work around the problem.
I hope this helps,
-+ Tatu +-
-+ Tatu +-
On Wed, Dec 27, 2017 at 10:06 AM, <[email protected]> wrote:
> I'm trying to parse byte array (retrieved from HttpServletRequest POST body)
> to JsonNode object. Some clients uses dirty encoding that results a
> JsonParseException: Invalid UTF-8 middle byte 0x28. If I convert the byte
> array to string and then parse it using the same objectMapper I wouldn't
> have a problem. But this would add extra execution time to the service
> (small but not insignificant for the application I have). The dirty encoding
> occurs with only two fields and it is acceptable for the application to use
> null for these fields when that happens.
>
> The question: is there a flag to configure Jackson to use null for fields
> that throw this exception (following the code suggests there is none). Or is
> it possible to implement custom parser or encoder for these fields that
> support the required behavior.
>
> Sample code to reproduce:
>
>
> ObjectMapper objectMapper = new ObjectMapper();
> objectMapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_CONTROL_CHARS,
> true);
> objectMapper.configure(JsonParser.Feature.ALLOW_BACKSLASH_ESCAPING_ANY_CHARACTER,
> true);
> String s = "{\"id\":\"33226\",\"name\":\"Some Name\"}";
> byte[] bytes = s.getBytes();
>
> // simulating the dirty encoding
> bytes[9] = (byte) 0xc3;
> bytes[10] = (byte) 0x28;
>
> //converting bytes to String and then parsing it works fine
> System.out.println("Parsing String:");
> JsonNode tree1 = objectMapper.readTree(new String(bytes, "UTF8"));
> System.out.println(tree1);
>
>
> try {
> // but parsing the dirty byte array directly throws an Exception
> System.out.println("Parsing byte array:");
> JsonNode tree2 = objectMapper.readTree(bytes);
> System.out.println(tree2);
> } catch (Exception e) {
> e.printStackTrace();
> }
>
>
>
> Output:
> Parsing String:
> {"id":"33�(6","name":"Some Name"}
> Parsing byte array:
> com.fasterxml.jackson.core.JsonParseException: Invalid UTF-8 middle byte
> 0x28
> at [Source: (byte[])"{"id":"33�(6","name":"Some Name"}"; line: 1, column:
> 12]
> at
> com.fasterxml.jackson.core.JsonParser._constructError(JsonParser.java:1798)
> at
> com.fasterxml.jackson.core.base.ParserMinimalBase._reportError(ParserMinimalBase.java:663)
> at
> com.fasterxml.jackson.core.json.UTF8StreamJsonParser._reportInvalidOther(UTF8StreamJsonParser.java:3544)
> at
> com.fasterxml.jackson.core.json.UTF8StreamJsonParser._reportInvalidOther(UTF8StreamJsonParser.java:3551)
> at
> com.fasterxml.jackson.core.json.UTF8StreamJsonParser._decodeUtf8_2(UTF8StreamJsonParser.java:3324)
> at
> com.fasterxml.jackson.core.json.UTF8StreamJsonParser._finishString2(UTF8StreamJsonParser.java:2456)
>
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