Pingora 0.5.0

0.5.0 - 2025-05-09

🚀 Features

• Add tweak_new_upstream_tcp_connection hook to invoke logic on new upstream TCP sockets prior to connection
• Add ability to configure max retries for upstream proxy failures
• Allow tcp user timeout to be configurable
• Add peer address to downstream handshake error logs
• Allow proxy to set stream level downstream read timeout
• Improve support for sending custom response headers and bodies for error messages
• Allow configuring multiple listener tasks per endpoint
• Add get_stale and get_stale_while_update for memory-cache

🐛 Bug Fixes

• Fix deadloop if proxy_handle_upstream exits earlier than proxy_handle_downstream
• Check on h2 stream end if error occurred for forwarding HTTP tasks
• Check for content-length underflow on end of stream h2 header
• Correctly send empty h2 data frames prior to capacity polling
• Signal that the response is done when body write finishes to avoid h1 downstream/h2 upstream errors
• Ignore h2 pipe error when finishing an H2 upstream
• Add finish_request_body() for HTTP healthchecks so that H2 healthchecks succeed
• Fix Windows compile errors by updating impl<T> UniqueID to use correct return type
• Fixed compilation errors on Windows
• Poll for H2 capacity before sending H2 body to propagate backpressure
• Fix for write_error_response for http2 downstreams to set EOS
• Always drain v1 request body before session reuse
• Fixes HTTP1 client reads to properly timeout on initial read
• Fixes issue where if TLS client never sends any bytes, hangs forever

Everything Else

• Add builder api for pingora listeners
• Better handling for h1 requests that contain both transfer-encoding and content-length
• Allow setting raw path in request to support non-UTF8 use cases
• Allow reusing session on errors prior to proxy upstream
• Avoid allocating large buffer in the accept() loop
• Ensure HTTP/1.1 when forcing chunked encoding
• Reject if the HTTP header contains duplicated Content-Length values
• proxy_upstream_filter tries to reuse downstream by default
• Allow building server that avoids std::process::exit during shutdown
• Update Sentry crate to 0.36
• Update the bounds on MemoryCache methods to accept broader key types
• Flush already received data if upstream write errors
• Allow modules to receive HttpTask::Done, flush response compression on receiving Done task
• API signature changes as part of experimental proxy cache support
• Note MSRV was effectively bumped to 1.82 from 1.72 due to a dependency update, though older compilers may still be able to build by pinning dependencies, e.g. cargo update -p backtrace --precise 0.3.74.