4.1.2: New implementation for SSE in webserver #9297
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Provides a new implementation for SSE in the webserver. This implementation does not use the normal output stream to serialize the events to avoid problems with buffering and chunked encoding. Instead, it writes directly to the underlying socket writer and flushes data as needed. As a result, chunked encoding is no longer used for SSE. Several tests have been updated.
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Sep 27, 2024
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Backport of #9224 to Helidon 4.1.2
Description
Provides a new implementation for SSE in webserver. This implementation does not use the normal output stream to serialize the events to avoid problems with buffering and chunked encoding. Instead, it writes directly to the underlying socket writer and flushes data as needed. As a result, chunked encoding is no longer used for SSE. Several tests have been updated. Fixes #9164.
Summary of Changes
createmethod inSinkProviderthat deprecates the old one. This change is required for the new implementation. Not a very popular SPI, but we shall continue to support the old method (and continue to include the old implemtnation) for some time. ClassHttp1ServerResponseupdated accordingly.SseSinkthat writes directly to a writer. Also needs to write response status line and headers. No longer uses the output stream from the response.SimpleSseClientclass to test SSE endpoints without usingWebClient. This is required because we don't use chunked encoding anymore. Related tests have been updated.