github.com/linapex/ethereum-go-chinese@v0.0.0-20190316121929-f8b7a73c3fa1/node/defaults.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 19:16:40</date>
    10  //</624450102219509760>
    11  
    12  
    13  package node
    14  
    15  import (
    16  	"os"
    17  	"os/user"
    18  	"path/filepath"
    19  	"runtime"
    20  
    21  	"github.com/ethereum/go-ethereum/p2p"
    22  	"github.com/ethereum/go-ethereum/p2p/nat"
    23  	"github.com/ethereum/go-ethereum/rpc"
    24  )
    25  
    26  const (
    27  DefaultHTTPHost = "localhost" //HTTP RPC服务器的默认主机接口
    28  DefaultHTTPPort = 8545        //HTTP RPC服务器的默认TCP端口
    29  DefaultWSHost   = "localhost" //WebSocket RPC服务器的默认主机接口
    30  DefaultWSPort   = 8546        //WebSocket RPC服务器的默认TCP端口
    31  )
    32  
    33  //默认配置包含合理的默认设置。
    34  var DefaultConfig = Config{
    35  	DataDir:          DefaultDataDir(),
    36  	HTTPPort:         DefaultHTTPPort,
    37  	HTTPModules:      []string{"net", "web3"},
    38  	HTTPVirtualHosts: []string{"localhost"},
    39  	HTTPTimeouts:     rpc.DefaultHTTPTimeouts,
    40  	WSPort:           DefaultWSPort,
    41  	WSModules:        []string{"net", "web3"},
    42  	P2P: p2p.Config{
    43  		ListenAddr: ":30303",
    44  		MaxPeers:   25,
    45  		NAT:        nat.Any(),
    46  	},
    47  }
    48  
    49  //defaultdatadir是用于数据库和其他数据库的默认数据目录
    50  //持久性要求。
    51  func DefaultDataDir() string {
    52  //尝试将数据文件夹放在用户的home目录中
    53  	home := homeDir()
    54  	if home != "" {
    55  		if runtime.GOOS == "darwin" {
    56  			return filepath.Join(home, "Library", "Ethereum")
    57  		} else if runtime.GOOS == "windows" {
    58  			return filepath.Join(home, "AppData", "Roaming", "Ethereum")
    59  		} else {
    60  			return filepath.Join(home, ".ethereum")
    61  		}
    62  	}
    63  //因为我们无法猜测一个稳定的位置，所以返回空的，稍后再处理
    64  	return ""
    65  }
    66  
    67  func homeDir() string {
    68  	if home := os.Getenv("HOME"); home != "" {
    69  		return home
    70  	}
    71  	if usr, err := user.Current(); err == nil {
    72  		return usr.HomeDir
    73  	}
    74  	return ""
    75  }
    76