fix(http): preserve all headers from Headers object #57802
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when initialized from a
Headersobject containing multiple values for the same header,HttpHeadersnow contains all the header values instead of only having one of them.Fixes #57798
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PR Type
What kind of change does this PR introduce?
What is the current behavior?
When initialized from a
Headersobject containing multiple values for the same header,HttpHeaderscontained only one of the header values.Issue Number: #57798
What is the new behavior?
It now contains all the header values, as in the original
Headersobject.Does this PR introduce a breaking change?
(It does change the behavior of the HttpHeaders class, which might cause behavior changes in existing code, but the old behavior was a bug).