v1.15.0

What's Changed

Since the last release, we have been significantly increasing coverage of our conformance suite. This has identified several inconsistencies with other Connect, gRPC, and gRPC-Web implementations. This release includes several fixes that will help align this implementation with others, behavior that can be verified by the conformance tests going forward. The fixes are backward-compatible with gRPC and Connect clients and servers. They fix some aspects of the wire representation and edge-case handling of spurious requests and responses, and they may affect users directly inspecting HTTP requests and responses.

Governance

• Add @emcfarlane as a maintainer in #680 🎉

Enhancements

• Add transport-level retry support for RPCs with unary and server-stream RPCs. This also improves efficiency by eliminating a goroutine and a message copy. By @emcfarlane in #649
• Prefer "application/grpc" over "application/grpc+proto" content-type when issuing gRPC calls. This accommodates Google Cloud Platform servers, which don't fully implement the gRPC specification. By @lrewega in #655
• Small efficiency gains in on all outbound HTTP requests and unary Connect response validation by @mattrobenolt in #682, #683
• Improve efficiency handling gRPC-Web and Connect end-of-stream messages by @jhump in #678

Bugfixes

• Fix HTTP status to Code mapping by @emcfarlane in #673
• Client should verify response content-type by @jhump in #679
• Omit erroneous @type attribute from Connect error detail debug string by @jhump in #688
• Use context to correctly classify some errors with Canceled or DeadlineExceeded code by @emcfarlane in #659
• Fix trailers-only response handling and some gRPC error coding by @jhump in #677, #690

Full Changelog: v1.14.0...v1.15.0