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Improved handling of 100 Continue #12113

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sbordet
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@sbordet sbordet commented Jul 31, 2024

  • Now HttpClient removed the Expect header if there is no request content.
  • Changed AbstractProxyServlet and ProxyHandler check for request content: now the Content-Type header is not taken into consideration.
  • Now the server avoids sending the 100 Continue response if there is no request content.

* Changed ContentSender demand from iterate()+IDLE to succeeded()+SCHEDULED.
  This ensures that there is no re-iteration in case a 100 Continue response arrives.
  This, in turn, avoids that the demand is performed multiple times, causing ISE to be thrown.
* Changed the 100 Continue action of the proxy Servlet/Handler, that provides the request content, to be executed by the HttpSender, rather than by the HttpReceiver.

Signed-off-by: Simone Bordet <[email protected]>
* Now `HttpClient` removed the `Expect` header if there is no request content.
* Changed AbstractProxyServlet and ProxyHandler check for request content: now the Content-Type header is not taken into consideration.
* Now the server avoids sending the 100 Continue response if there is no request content.

Signed-off-by: Simone Bordet <[email protected]>
@joakime
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joakime commented Aug 1, 2024

Is the work here going to help the old 100-Continue issue with AsyncMiddleManServlet?

Now the request body is not defaulted if missing, but just kept null.

Signed-off-by: Simone Bordet <[email protected]>
@gregw gregw dismissed their stale review August 2, 2024 05:50

I'm OK with the ==0 check

gregw
gregw previously approved these changes Aug 2, 2024
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OK, but a couple of niggles.

@@ -215,6 +207,9 @@ protected void normalizeRequest(HttpRequest request)
request.addHeader(new HttpField.LongValueHttpField(HttpHeader.CONTENT_LENGTH, contentLength));
}
}
// RFC 9110, section 10.1.1.
if (content == null || content.getLength() == 0)
request.headers(h -> h.remove(HttpHeader.EXPECT));
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technically you should just remove the 100-continue value from the Expect header, but as there are currently no other defined values, this is probably OK.

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Correct. And we don't have an easy API in HttpFields to remove a single value.

@sbordet
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sbordet commented Aug 2, 2024

@gregw I fixed the niggles in #12111. Not a big fan of StringUtil when I can use JDK methods.

@joakime the work here does not address #9758, which I will look at separately.

firoj0

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gregw commented Aug 2, 2024

@gregw I fixed the niggles in #12111. Not a big fan of StringUtil when I can use JDK methods.

In this case, the StringUtil method avoids an allocation and is much clearer to read

lorban
lorban previously approved these changes Aug 7, 2024
@garydgregory
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garydgregory commented Aug 12, 2024

Hi All,

Would you please set expectations as to next steps? Are we waiting on a review from @gregw ?

TY!

Signed-off-by: Simone Bordet <[email protected]>
@sbordet sbordet requested review from firoj0 and lorban and removed request for firoj0 August 13, 2024 09:23
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sbordet commented Aug 13, 2024

@garydgregory this PR is almost ready to be merged in, we won't wait for @gregw (currently in vacation).

It will be in the next Jetty 12 release, due end of month.

Signed-off-by: Simone Bordet <[email protected]>
@sbordet sbordet requested a review from lorban August 13, 2024 10:31
@sbordet sbordet merged commit fc9cbda into jetty-12.0.x Aug 13, 2024
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@sbordet sbordet deleted the fix/jetty-12.0.x/httpsender-proxy-continue-fixes branch August 13, 2024 13:06
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Cannot invoke "org.eclipse.jetty.client.transport.HttpExchange.getRequest()" because "exchange" is null
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