[jira] [Created] (OLINGO-1138) $format=json does not return default UTF-8 charset in response content type

[Lars Erbe (JIRA)]

Lars Erbe created OLINGO-1138:
---------------------------------

             Summary: $format=json does not return default UTF-8 charset in 
response content type
                 Key: OLINGO-1138
                 URL: https://issues.apache.org/jira/browse/OLINGO-1138
             Project: Olingo
          Issue Type: Bug
          Components: odata4-server
    Affects Versions: (Java) V4 4.3.0
            Reporter: Lars Erbe
            Priority: Minor
         Attachments: AssetGroupSet_correct_charset.json, 
AssetGroupSet_wrong_charset.json

Using the $format value "json" does not return the correct default charset as 
parameter in the response content-type header attribute.

Attachment "AssetGroupSet_wrong_charset": using request URL with explicit 
charset in $format query parameter: ?$format=json

Attachment "AssetGroupSet_correct_charset": using request URL with explicit 
charset in $format query parameter: ?$format=application/json;charset=UTF-8

Note the Norwegian characters in the "Name" property and the "GeoPosition/City" 
property to see the difference.

Link to OData V4 JSON Format specification:
http://docs.oasis-open.org/odata/odata-json-format/v4.0/os/odata-json-format-v4.0-os.html#_Toc372793046
"4.1 Header Content-Type
...
Requests MAY add the charset parameter to the content type. Allowed values are 
UTF-8, UTF-16, and UTF-32. *If no charset parameter is present, UTF-8 MUST be 
assumed.*"

I could workaround the problem by setting the charset=UTF-8 content-type header 
parameter before setting the header at the response object in the processor.



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