config, userdirs, refactor
This commit is contained in:
parent
b9ec9f24b9
commit
7006d7e6a4
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@ -0,0 +1,62 @@
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package main
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import (
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"github.com/BurntSushi/toml"
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"io/ioutil"
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"os"
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"fmt"
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)
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type Config struct {
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Port int
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Hostname string
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RootDir string
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UserDirEnable bool
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UserDir string
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// UserSlug string
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DirlistReverse bool
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DirlistSort string
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DirlistTitles bool
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}
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var defaultConf = &Config{
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Port: 300,
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Hostname: "localhost",
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RootDir: "/var/spartan/",
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DirlistReverse: false,
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DirlistSort: "name",
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DirlistTitles: true,
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UserDirEnable: false,
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UserDir: "public_spartan",
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}
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func LoadConfig(path string) (*Config, error) {
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var err error
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var conf Config
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// Defaults
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conf = *defaultConf
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_, err = os.Stat(path)
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if os.IsNotExist(err) {
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fmt.Println(path, "does not exist, using default configuration values")
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return &conf, nil
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}
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f, err := os.Open(path)
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if err == nil {
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defer f.Close()
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contents, err := ioutil.ReadAll(f)
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if err != nil {
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return nil, err
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}
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if _, err = toml.Decode(string(contents), &conf); err != nil {
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return nil, err
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}
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}
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if conf.DirlistSort != "name" && conf.DirlistSort != "time" && conf.DirlistSort != "size" {
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fmt.Println("Warning: DirlistSort config option is not one of name/time/size, defaulting to name.")
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conf.DirlistSort = "name"
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}
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return &conf, nil
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}
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13
dirlist.go
13
dirlist.go
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@ -11,9 +11,9 @@ import (
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"strings"
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)
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func generateDirectoryListing(reqPath, path string) ([]byte, error) {
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dirSort := "time"
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dirReverse := false
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func generateDirectoryListing(reqPath, path string, conf *Config) ([]byte, error) {
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dirSort := conf.DirlistSort
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dirReverse := conf.DirlistReverse
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var listing string
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files, err := ioutil.ReadDir(path)
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if err != nil {
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@ -22,6 +22,7 @@ func generateDirectoryListing(reqPath, path string) ([]byte, error) {
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listing = "# Directory listing\n\n"
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// TODO: custom dirlist header in config
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// Do "up" link first
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reqPath = strings.ReplaceAll(reqPath, "/.", "")
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if reqPath != "/" {
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if strings.HasSuffix(reqPath, "/") {
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reqPath = reqPath[:len(reqPath)-1]
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@ -59,13 +60,13 @@ func generateDirectoryListing(reqPath, path string) ([]byte, error) {
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if file.IsDir() {
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relativeUrl += "/"
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}
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listing += fmt.Sprintf("=> %s %s\n", relativeUrl, generatePrettyFileLabel(file, path))
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listing += fmt.Sprintf("=> %s %s\n", relativeUrl, generatePrettyFileLabel(file, path, conf))
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}
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return []byte(listing), nil
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}
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func generatePrettyFileLabel(info os.FileInfo, path string) string {
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dirTitles := true // TODO: config
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func generatePrettyFileLabel(info os.FileInfo, path string, conf *Config) string {
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dirTitles := conf.DirlistTitles
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var size string
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if info.IsDir() {
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size = " "
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5
go.mod
5
go.mod
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@ -1,3 +1,8 @@
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module spsrv
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go 1.15
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require (
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github.com/BurntSushi/toml v0.3.1
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github.com/spf13/pflag v1.0.5
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)
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@ -0,0 +1,4 @@
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github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
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github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
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github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
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github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
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124
spsrv.go
124
spsrv.go
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@ -3,7 +3,6 @@ package main
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import (
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"bufio"
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"errors"
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"flag"
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"fmt"
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"io"
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"io/ioutil"
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@ -14,6 +13,8 @@ import (
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"path/filepath"
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"strconv"
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"strings"
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flag "github.com/spf13/pflag"
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)
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const (
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@ -24,38 +25,58 @@ const (
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)
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var (
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hostname = flag.String("h", "localhost", "hostname")
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contentDir = flag.String("d", "/var/spartan", "content directory")
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port = flag.Int("p", 300, "port number")
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hostname = flag.StringP("hostname", "h", defaultConf.Hostname, "Hostname")
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port = flag.IntP("port", "p", defaultConf.Port, "Port to listen to")
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rootDir = flag.StringP("dir", "d", defaultConf.RootDir, "Root content directory")
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confPath = flag.StringP("config", "c", "/etc/spsrv.conf", "Path to config file")
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)
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func main() {
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flag.Parse()
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conf, err := LoadConfig(*confPath)
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if err != nil {
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fmt.Println("Error loading config")
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fmt.Println(err.Error())
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return
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}
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listener, err := net.Listen("tcp", fmt.Sprintf(":%d", *port))
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// This allows users overriding values in config via the CLI
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if *hostname != defaultConf.Hostname {
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conf.Hostname = *hostname
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}
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if *port != defaultConf.Port {
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conf.Port = *port
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}
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if *rootDir != defaultConf.RootDir {
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conf.RootDir = *rootDir
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}
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// TODO: do something with conf.Hostname (b(like restricting to ipv4/6 etc)
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listener, err := net.Listen("tcp", fmt.Sprintf(":%d", conf.Port))
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if err != nil {
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log.Fatalf("Unable to listen: %s", err)
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}
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log.Println("✨ You are now running on spsrv ✨")
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log.Printf("Listening for connections on port: %d", *port)
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log.Printf("Listening for connections on port: %d", conf.Port)
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serveSpartan(listener)
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serveSpartan(listener, conf)
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}
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// serveSpartan accepts connections and returns content
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func serveSpartan(listener net.Listener) {
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func serveSpartan(listener net.Listener, conf *Config) {
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for {
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// Blocking until request received
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conn, err := listener.Accept()
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if err != nil {
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continue
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}
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log.Println("Accepted connection")
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go handleConnection(conn)
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log.Println("Accepted connection from", conn.RemoteAddr())
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go handleConnection(conn, conf)
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}
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}
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// handleConnection handles a request and does the reponse
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func handleConnection(conn io.ReadWriteCloser) {
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// handleConnection handles a request and does the response
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func handleConnection(conn io.ReadWriteCloser, conf *Config) {
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defer conn.Close()
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// Check the size of the request buffer.
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@ -73,59 +94,82 @@ func handleConnection(conn io.ReadWriteCloser) {
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// Parse incoming request URL.
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request := s.Text()
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path, _, err := parseRequest(request)
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reqPath, _, err := parseRequest(request)
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if err != nil {
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sendResponseHeader(conn, statusClientError, "Bad request")
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return
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}
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log.Println("Handling request:", request)
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if strings.Contains(reqPath, ".."){
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sendResponseHeader(conn, statusClientError, "Stop it with your directory traversal technique!")
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return
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}
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// Time to fetch the files!
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serveFile(conn, path)
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path := resolvePath(reqPath, conf)
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serveFile(conn, reqPath, path, conf)
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log.Println("Closed connection")
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}
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// serveFile serves opens the requested path and returns the file content
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func serveFile(conn io.ReadWriteCloser, reqPath string) {
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func resolvePath(reqPath string, conf *Config) (path string) {
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// Handle tildes
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if strings.HasPrefix(reqPath, "/~") {
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bits := strings.Split(reqPath, "/")
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username := bits[1][1:]
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new_prefix := filepath.Join("/home/", username, conf.UserDir)
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path = filepath.Clean(strings.Replace(reqPath, bits[1], new_prefix, 1))
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if strings.HasSuffix(reqPath, "/") {
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path = filepath.Join(path, "index.gmi")
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}
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return
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}
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path = reqPath
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// TODO: [config] default index file for a directory is index.gmi
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path := reqPath
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if strings.HasSuffix(reqPath, "/") || reqPath == "" {
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path = filepath.Join(reqPath, "index.gmi")
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}
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cleanPath := filepath.Clean(path)
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path = filepath.Clean(filepath.Join(conf.RootDir, path))
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return
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}
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// serveFile serves opens the requested path and returns the file content
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func serveFile(conn io.ReadWriteCloser, reqPath, path string, conf *Config) {
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// If the content directory is not specified as an absolute path, make it absolute.
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prefixDir := ""
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var rootDir http.Dir
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if !strings.HasPrefix(*contentDir, "/") {
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prefixDir, _ = os.Getwd()
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}
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// prefixDir := ""
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// var rootDir http.Dir
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// if !strings.HasPrefix(conf.RootDir, "/") {
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// prefixDir, _ = os.Getwd()
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// }
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// Avoid directory traversal type attacks.
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rootDir = http.Dir(prefixDir + strings.Replace(*contentDir, ".", "", -1))
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// rootDir = http.Dir(prefixDir + strings.Replace(conf.RootDir, ".", "", -1))
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// Open the requested resource.
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var content []byte
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log.Printf("Fetching: %s", cleanPath)
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f, err := rootDir.Open(cleanPath)
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log.Printf("Fetching: %s", path)
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f, err := os.Open(path)
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if err != nil {
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// not putting the /folder to /folder/ redirect here because folder can still
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// be opened without errors
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// Directory listing
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if strings.HasSuffix(cleanPath, "index.gmi") {
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fullPath := filepath.Join(fmt.Sprint(rootDir), cleanPath)
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if strings.HasSuffix(path, "index.gmi") {
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// fullPath := filepath.Join(fmt.Sprint(rootDir), path)
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fullPath := path
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if _, err := os.Stat(fullPath); os.IsNotExist(err) {
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// If and only if the path is index.gmi AND index.gmi does not exist
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fullPath = strings.TrimSuffix(fullPath, "index.gmi")
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log.Println("Generating directory listing:", fullPath)
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content, err = generateDirectoryListing(reqPath, fullPath)
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if err != nil {
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log.Println(err)
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sendResponseHeader(conn, statusServerError, "Error generating directory listing")
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if _, err := os.Stat(fullPath); err == nil {
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// If the directly exists
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log.Println("Generating directory listing:", fullPath)
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content, err = generateDirectoryListing(reqPath, fullPath, conf)
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if err != nil {
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log.Println(err)
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sendResponseHeader(conn, statusServerError, "Error generating directory listing")
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return
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}
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path += ".gmi" // OOF, this is just to have the text/gemini meta later lol
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serveContent(conn, content, path)
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return
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}
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cleanPath += ".gmi" // OOF, this is just to have the text/gemini meta later lol
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serveContent(conn, content, cleanPath)
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return
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}
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}
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log.Println(err)
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@ -141,16 +185,16 @@ func serveFile(conn io.ReadWriteCloser, reqPath string) {
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// I wish I could check if err is a "path/to/dir" is a directory error
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// but I couldn't figure out how, so this check below is the best I
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// can come up with I guess
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if _, err := os.Stat(filepath.Join(fmt.Sprint(rootDir), cleanPath+"/")); !os.IsNotExist(err) {
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log.Println("Redirecting", cleanPath, "to", cleanPath+"/")
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sendResponseHeader(conn, statusRedirect, cleanPath+"/")
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if _, err := os.Stat(path + "/"); !os.IsNotExist(err) {
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log.Println("Redirecting", path, "to", reqPath+"/")
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sendResponseHeader(conn, statusRedirect, reqPath+"/")
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return
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}
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log.Println(err)
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sendResponseHeader(conn, statusServerError, "Resource could not be read")
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return
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}
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serveContent(conn, content, cleanPath)
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serveContent(conn, content, path)
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}
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func serveContent(conn io.ReadWriteCloser, content []byte, path string) {
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