SSE writer does not allow customizing the charset [SPR-16516]

[spring-projects-issues]

Michael Stadler opened SPR-16516 and commented

I've been struggling to set the encoding to UTF-8 for my text/event-stream content. I would like to change the encoding so that clients (e.g. the browser) knows how to interpret umlaut characters correctly (e.g. ä, ü, ö). I posted this problem on Stack Overflow (see Reference URL), where a more detailed description can be found. Thank you.

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Affects: 5.0.4

Reference URL: https://stackoverflow.com/questions/48864564/spring-boot-webflux-set-utf-8-encoding

Issue Links:

• Jackson Encoder(s) ignore charset in MimeType [SPR-16539] #21082 Jackson Encoder(s) ignore charset in MimeType

Referenced from: commits e0e90ed

[spring-projects-issues]

Rossen Stoyanchev commented

Indeed the media type seems to be hardcoded to "text/event-stream", even though we actually use UTF-8 for the writing of data.

[spring-projects-issues]

Rossen Stoyanchev commented

This should now be fixed, as far as the Content-Type header and text rendered to the response are concerned. Separately I've created #21082 which should not impact this ticket, given the Jackson encoder uses UTF-8 by default, but is closely related nevertheless.