HTTP Version Compatibility Problem in 0.9.0 Release

[pstutz]

Issue Description

After upgrading to the 0.9.0 release, connections that previously worked are now failing with the following error:

Caused by: requests.RequestsException: Received RST_STREAM: Use HTTP/1.1 for request
    at requests.Requester$$anon$1.readBytesThrough(Requester.scala:293)
    at geny.Readable.writeBytesTo(Writable.scala:93)
    at geny.Readable.writeBytesTo$(Writable.scala:91)
    at requests.Requester$$anon$1.writeBytesTo(Requester.scala:191)
    at requests.Requester.apply(Requester.scala:140)

Current Situation

The underlying HttpClient supports setting the HTTP version:

HttpClient client = HttpClient.newBuilder().version(Version.HTTP_1_1)

However, this functionality is not exposed in the new 0.9.0 release. The HttpClient seems to manage protocol versions differently by default, and the current requests API doesn't provide a way to address this issue.

Root Cause

The HttpClient appears to use HTTP/2 by default:

if (builder.version == null) {
    version = HttpClient.Version.HTTP_2;
} else {
    version = builder.version;
}

Proposed Solution

It would be helpful if the new API allowed setting HTTP/1.1 as the default version to maintain compatibility with services that don't support HTTP/2.

Additional Notes

This change would be crucial for maintaining backward compatibility with services that rely on HTTP/1.1.