gitee.com/liu-zhao234568/cntest@v1.0.0/node/defaults.go (about)

     1  // Copyright 2016 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package node
    18  
    19  import (
    20  	"os"
    21  	"os/user"
    22  	"path/filepath"
    23  	"runtime"
    24  
    25  	"gitee.com/liu-zhao234568/cntest/p2p"
    26  	"gitee.com/liu-zhao234568/cntest/p2p/nat"
    27  	"gitee.com/liu-zhao234568/cntest/rpc"
    28  )
    29  
    30  const (
    31  	DefaultHTTPHost    = "localhost" // Default host interface for the HTTP RPC server
    32  	DefaultHTTPPort    = 8545        // Default TCP port for the HTTP RPC server
    33  	DefaultWSHost      = "localhost" // Default host interface for the websocket RPC server
    34  	DefaultWSPort      = 8546        // Default TCP port for the websocket RPC server
    35  	DefaultGraphQLHost = "localhost" // Default host interface for the GraphQL server
    36  	DefaultGraphQLPort = 8547        // Default TCP port for the GraphQL server
    37  )
    38  
    39  // DefaultConfig contains reasonable default settings.
    40  var DefaultConfig = Config{
    41  	DataDir:             DefaultDataDir(),
    42  	HTTPPort:            DefaultHTTPPort,
    43  	HTTPModules:         []string{"net", "web3"},
    44  	HTTPVirtualHosts:    []string{"localhost"},
    45  	HTTPTimeouts:        rpc.DefaultHTTPTimeouts,
    46  	WSPort:              DefaultWSPort,
    47  	WSModules:           []string{"net", "web3"},
    48  	GraphQLVirtualHosts: []string{"localhost"},
    49  	P2P: p2p.Config{
    50  		ListenAddr: ":30303",
    51  		MaxPeers:   50,
    52  		NAT:        nat.Any(),
    53  	},
    54  }
    55  
    56  // DefaultDataDir is the default data directory to use for the databases and other
    57  // persistence requirements.
    58  func DefaultDataDir() string {
    59  	// Try to place the data folder in the user's home dir
    60  	home := homeDir()
    61  	if home != "" {
    62  		switch runtime.GOOS {
    63  		case "darwin":
    64  			return filepath.Join(home, "Library", "Ethereum")
    65  		case "windows":
    66  			// We used to put everything in %HOME%\AppData\Roaming, but this caused
    67  			// problems with non-typical setups. If this fallback location exists and
    68  			// is non-empty, use it, otherwise DTRT and check %LOCALAPPDATA%.
    69  			fallback := filepath.Join(home, "AppData", "Roaming", "Ethereum")
    70  			appdata := windowsAppData()
    71  			if appdata == "" || isNonEmptyDir(fallback) {
    72  				return fallback
    73  			}
    74  			return filepath.Join(appdata, "Ethereum")
    75  		default:
    76  			return filepath.Join(home, ".ethereum")
    77  		}
    78  	}
    79  	// As we cannot guess a stable location, return empty and handle later
    80  	return ""
    81  }
    82  
    83  func windowsAppData() string {
    84  	v := os.Getenv("LOCALAPPDATA")
    85  	if v == "" {
    86  		// Windows XP and below don't have LocalAppData. Crash here because
    87  		// we don't support Windows XP and undefining the variable will cause
    88  		// other issues.
    89  		panic("environment variable LocalAppData is undefined")
    90  	}
    91  	return v
    92  }
    93  
    94  func isNonEmptyDir(dir string) bool {
    95  	f, err := os.Open(dir)
    96  	if err != nil {
    97  		return false
    98  	}
    99  	names, _ := f.Readdir(1)
   100  	f.Close()
   101  	return len(names) > 0
   102  }
   103  
   104  func homeDir() string {
   105  	if home := os.Getenv("HOME"); home != "" {
   106  		return home
   107  	}
   108  	if usr, err := user.Current(); err == nil {
   109  		return usr.HomeDir
   110  	}
   111  	return ""
   112  }