gRPC 1.16.0 正式发布，谷歌的高性能 RPC 框架

gRPC 1.16.0 发布了，这是一个 gRPC 核心更新版本，针对各语言版本都进行了更新，包含优化、改进和错误修复，下面列出了值得关注的更新：

Core

• Keepalive watchdog firing should return status UNAVAILABLE . ( #16764 )

• Set TCP_USER_TIMEOUT socket option for linux . ( #16419 )

• When using c-ares, resolve ip literals and Windows localhost on our own. ( #16420 )

• Turn loading system root certificate as default. ( #16536 )

• Change pick_first to not unref unselected subchannels. ( #16342 )

C++

• fix *_unsecure.pc files. ( #16754 )

• cmake: prevent C core from depending on libstdc++. ( #16752 )

• Implement Watch method in health check service. ( #16574 )

• Fix async_stream.h warning on Visual Studio. ( #16544 )

C#

• Secure channel throughput improvements: Linux x86_64 version of grpc_csharp_ext nuget now ships with assembly-optimized version of boringssl, which leads to significant improvements in throughput of secure C# channels. See https://github.com/grpc/grpc/blob/v1.16.x/doc/ssl-performance.md for details.

• Expose certificate request type in SslServerCredentials . ( #16552 )

• build assembly-optimized grpc_csharp_ext with cmake. ( #16777 )

• ChannelOption improvements. ( #16756 )

• Various allocation optimizations. ( #16631 )

• Add new C# serialization API. ( #16367 )

• Add constructor overload for RpcException . ( #16553 )

• Avoid leaking resources when starting a call fails. ( #16554 )

• Expose TryWaitForStateChangedAsync . ( #16556 )

• Add exception info to Status.Detail if metadata credentials throws. ( #16543 )

Objective-C

• Fixed a crash related to error reporting. ( #16696 )

Python

• Fix SSL channel credential when an argument is None. ( #16640 )

• Bazel: Fix python BUILD rules. ( #16561 )

Ruby

• Switch to send instead of  method(...).call . ( #16642 )

• Rescue GRPC::Core::CallError so that worker threads are not killed. ( #16477 )

• support for ruby_package options. ( #16014 )

• ruby: Raise instead of hanging if grpc is used before and after fork. ( #16332 )

发布说明和下载地址 https://github.com/grpc/grpc/releases/tag/v1.16.0

gRPC 是 Google 开源的高性能、通用 RPC 框架，面向移动和 HTTP/2 设计，是由谷歌发布的首款基于 Protocol Buffers 的 RPC 框架。gRPC 基于 HTTP/2 标准设计，带来诸如双向流、流控、头部压缩、单 TCP 连接上的多复用请求等特性。这些特性使得其在移动设备上表现更好，更省电且节省空间占用。