Hi, I think Firefox Developer Tools should not display the TE request header value as "Trailers" since this is not a valid value as per the specification, and it is actually sending "trailers" over the wire [1].
I have submitted a bug regarding this [2]. [1] : https://hg.mozilla.org/mozilla-central/file/5de53d489b7d5613710a40b2c64693dbab31e8ee/netwerk/protocol/http/Http2Compression.cpp#l1167 [2] : https://bugzilla.mozilla.org/show_bug.cgi?id=1711482 On Sat, 15 May 2021 at 21:05, Jaikiran Pai <jai.forums2...@gmail.com> wrote: > > On 15/05/21 5:32 pm, Jaikiran Pai wrote: > > > > On 15/05/21 5:13 pm, Jaikiran Pai wrote: > >> Hello Krzysztof, > >> > >> On 15/05/21 1:07 am, Krzysztof K. wrote: > >>> Hi, > >>> I have an issue using http client communicating with servers that > >>> most probably are on GCP (I see header: "via: 1.1 google"). > >>> > >>> I get "java.io.IOException: Received RST_STREAM: Protocol error". > >>> ... > >>> > >>> But I'm on JDK 16 (build 16+35-2229) and I get this error when > >>> connecting to a website when I use the header "TE: Trailers" (needs > >>> first letter capitalized). > >>> > >>> When I remove this header everything works, if I switch to HTTP 1.1 > >>> (with that header) it also works. > >>> > >>> Here is a minimal reproducible example: > >>> > >>> HttpClient.newBuilder() > >>> .build() > >>> .send( > >>> HttpRequest.newBuilder() > >>> .header("TE", "Trailers") > >> > >> IMO, this is more of an application issue than the JDK. In HTTP/2 the > >> TE header[1] is expected to only have the value "trailers" (case > >> sensitive) as noted here[2]. If you change your code to use > >> "trailers" instead of "Trailers" it works (as you seem to have > >> noticed). As for why it works in Firefox or curl, I'm not sure - > >> perhaps they have special handling of this specific header to lower > >> case its value if it's "Trailers"? > > > > A quick check of the curl source code[1] suggests that it does indeed > > do special handling of this TE request param[2]. > > I meant request header. > > -Jaikiran > > -- Anirvan
