github.com/linapex/ethereum-dpos-chinese@v0.0.0-20190316121959-b78b3a4a1ece/swarm/sctx/sctx.go (about)

     1  
     2  //<developer>
     3  //    <name>linapex 曹一峰</name>
     4  //    <email>linapex@163.com</email>
     5  //    <wx>superexc</wx>
     6  //    <qqgroup>128148617</qqgroup>
     7  //    <url>https://jsq.ink</url>
     8  //    <role>pku engineer</role>
     9  //    <date>2019-03-16 12:09:49</date>
    10  //</624342679110553600>
    11  
    12  package sctx
    13  
    14  import "context"
    15  
    16  type ContextKey int
    17  
    18  const (
    19  	HTTPRequestIDKey ContextKey = iota
    20  	requestHostKey
    21  )
    22  
    23  func SetHost(ctx context.Context, domain string) context.Context {
    24  	return context.WithValue(ctx, requestHostKey, domain)
    25  }
    26  
    27  func GetHost(ctx context.Context) string {
    28  	v, ok := ctx.Value(requestHostKey).(string)
    29  	if ok {
    30  		return v
    31  	}
    32  	return ""
    33  }
    34