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我最近使用到了pkg/blob/master/utils/dup_arm64.go里的Dup方法，提示Dup3方法找不到，错误信息如下：

# mosn.io/pkg/utils
../../go/pkg/mod/github.com/wenxuwan/[email protected]/utils/dup_arm64.go:8:9: undefined: syscall.Dup3

我的电脑是mac m1，golang版本是go1.16.3.darwin-arm64，go env如下：

GO111MODULE="on"
GOARCH="arm64"
GOBIN=""
GOCACHE="/Users/mrbinary/Library/Caches/go-build"
GOENV="/Users/mrbinary/Library/Application Support/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="arm64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/mrbinary/go/pkg/mod"
GONOPROXY="gitlab.com"
GONOSUMDB="gitlab.com"
GOOS="darwin"
GOPATH="/Users/mrbinary/go"
GOPRIVATE="github.com"
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_arm64"
GOVCS=""
GOVERSION="go1.16.3"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/dev/null"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/ny/w9t1brsx7hq3gjc0tlfy6yyc0000gn/T/go-build2969965340=/tmp/go-build -gno-record-gcc-switches -fno-common"

这里的 GoWithRecover 是不是拆成两个函数比较好，我在使用 errgroup 需要传入裸函数，这样拆分可以使用到 recover 机制，同时是否开启 goroutine 交给用户决定。

 func GoWithRecover(handler func(), recoverHandler func(r interface{})) { 
 	go func() { 
 		WithRecover(handler, recoverHandler)
 	}() 
 } 

func WithRecover(handler func(), recoverHandler func(r interface{})) {
              defer func() { 
 			if r := recover(); r != nil { 
 				recoverLogger(os.Stderr, r) 
 				if recoverHandler != nil { 
 					go func() { 
 						defer func() { 
 							if p := recover(); p != nil { 
 								recoverLogger(os.Stderr, p) 
 							} 
 						}() 
 						recoverHandler(r) 
 					}() 
 				} 
 			} 
 		}() 
 		handler() 
}

Here's the Weekly Digest for mosn/pkg:

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通过 InitGlobalRoller 更新 roller 从 log.Roller{MaxTime: 24 * 60 * 60} 到 log.Roller{MaxSize: 100, MaxAge: 7, MaxBackups: 10} 发生 panic。
目前只支持：修改 MaxSize 字段吗？而且 MaxSize 这个字段不可以修改为0。

Hi

Now the log rotate function not configurable, may be should support user define own rotate function.

In our platform a script will find the file with format mosn_2020-xx-xx:14:00:00.log and will delete them period. So i need own rotate function to rename the file with our format.

fasthttp implements trailing headers as a part of the http request and response headers objects. To ensure we can use these without relying on fasthttp API, we need a few more functions, which I'm happy to implement after #65 is in. I need this to help support the new http-wasm host, which has glitches both in trailers and also multiple header values.

• GetKeys and GetKeysTrailer, to return all keys including ones special-cased internally by fasthttp
  • this is much easier than having users do a range function, as well more precise to unit test
• GetTrailer to return a single trailer
• AddTrailer to add a single trailer field for a key
• SetTrailer to overwrite a trailer with a single value
• DelTrailer to delete all trailers for a key
• GetAll and GetAllTrailer function to return all values for a key
  • this is much easier than having users do a range function, as well more precise to unit test

cc @taoyuanyuan I'll backfill unit tests and polish up stuff, but probably this should be done separate from the version bump