Last Update: 2024-04-03 14:03:54 +0000



AWS Sigv4 Authentication Plugin

A new plugin, :aws_sigv4, is now shipped with httpx. It implements the AWS Signature Version 4 request signing process, a well documented way of authenticating requests to AWS services, which has since been adopted by other cloud providers, such as Google Cloud Storage.

See how to use it here: gitlab.com/os85/httpx/-/wikis/AWS-Sigv4#sessionaws_sigv4_authentication

For convenience, there’s a derivative plugin, :aws_sdk_authentication, which builds on top of :aws_sigv4, and integrates with the aws-sdk-core gem, maintained by AWS, to resolve the authentication credentials (p.ex. if you support ephemeral access keys).

See how to use it here: gitlab.com/os85/httpx/-/wikis/AWS-Sigv4#sessionaws_sdk_authentication

Other FAQ: gitlab.com/os85/httpx/-/wikis/AWS-Sigv4#faqs

HTTP/2 support for JRuby

jruby-openssl doesn’t support ALPN protocol negotiation, nor are there plans to implement, which limited the seamless HTTP/2 usage in httpx. A new connection adapter was therefore added specifically for JRuby, where ssl/tls connections will be handled using ffi-based openssl bindings, provided you bundle ffi-compiler and concurrent-ruby, and install a TLS/1.2-compatible openssl package.

See how to use it here: gitlab.com/os85/httpx/-/wikis/JRuby-Truffleruby-Other-Rubies#http2


truffleruby support

httpx supports and tests against truffleruby (known to run tests since v20.3, passing all tests since v21).


Several optimizations were introduced:

  • Reduction in read/write system calls;

  • more usage of String#byteslice in parsing (instead of string mutation);

  • Avoid selection on connections with no outstanding requests;

They all contributed to a massive performance improvement, itself reflected in test runs, which need half the time they used to to complete.


  • HTTPX::ErrorResponse#to_s now uses the exception full message, instead of just the backtrace.


  • HTTP/2 stream protocol errors do not cause the process to hang (instead, error responnses are yielded);

  • Fixed body stream bugs on retries when error causing retry would happen mid-transfer;

  • Fixed :multipart plugin body rewind on retries to start the transfer from the beginning;

  • Fixed auto-load of :proxy plugin when HTTPS_PROXY or HTTP_PROXY is set;

  • Errno::EPIPE errors mid transfer now cause httpx to read from the server and get the appropriate HTTP error response;

  • Make sure that all requests have an error responnse if the error happens early;

  • Fixed TCP handshake Errno::INPROGRESS handling inside TLS connnections, which was causing the process to hang in a high handshake contention scenario;

  • Do not call the event loop if there’s nothing to listen on (the DoH resolver was being listened on even if there was nothing to be request);

  • Fixed double event registry for DoH resolvers; *