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Support multiple hostnames

Browse source 
Resolves #1.
This commit is contained in:
Trevor Slocum 2020-10-30 13:30:09 -07:00
parent ae6e0b6b7b
commit 8aec55c459
5 changed files with 163 additions and 89 deletions
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58
CONFIGURATION.md
View file

@ -6,35 +6,49 @@ Serve entries have either a `root` path or `proxy` URL. When a `root` path is
provided static files and directories are served from that location. When a
`proxy` URL is provided requests are forwarded to the Gemini server at that URL.
Paths are matched in the order they are provided.
When accessing a directory `index.gemini` or `index.gmi` is served.
# config.yaml
```yaml
# Hostname and port to listen for connections on
hostname: gemini.rocks
port: 1965
# Address to listen on
listen: 0.0.0.0:1965
# Path to certificate and private key
cert: /home/twins/data/certfile.crt
key: /home/twins/data/keyfile.key
# TLS certificates
certificates:
-
cert: /home/gemini.rocks/data/cert.crt
key: /home/gemini.rocks/data/cert.key
# Server paths
serve:
# Hosts and paths to serve
hosts:
-
path: /sites
root: /home/twins/data/sites
name: gemini.rocks
paths:
-
path: /sites
root: /home/gemini.rocks/data/sites
-
path: ^/(help|info)$
root: /home/gemini.rocks/data/help
-
path: ^/proxy-example$
proxy: gemini://localhost:1966
-
path: ^/cmd-example$
command: uname -a
-
path: /
root: /home/gemini.rocks/data/home
-
path: ^/(help|info)$
root: /home/twins/data/help
-
path: ^/proxy-example$
proxy: gemini://localhost:1966
-
path: ^/cmd-example$
command: uname -a
-
path: /
root: /home/twins/data/home
name: twins.rocketnine.space
paths:
-
path: /sites
root: /home/twins/data/sites
-
path: /
root: /home/twins/data/home
```

2
README.md
View file

@ -7,7 +7,7 @@
## Features
- Serve static files
- Serve output of system commands
- Serve the output of system commands
- Reverse proxy requests
## Download

77
config.go
View file

@ -6,12 +6,14 @@ import (
"log"
"os"
"regexp"
"strconv"
"strings"
"github.com/kballard/go-shellquote"
"gopkg.in/yaml.v3"
)
type serveConfig struct {
type pathConfig struct {
// Path to match
Path string
@ -24,17 +26,30 @@ type serveConfig struct {
cmd []string
}
type hostConfig struct {
Name string
Paths []*pathConfig
}
type certConfig struct {
Cert string
Key string
}
type serverConfig struct {
Cert string
Key string
Hostname string
Port int
Serve []*serveConfig
Listen string
Certificates []*certConfig
Hosts []*hostConfig
hostname string
port int
}
var config = &serverConfig{
Hostname: "localhost",
Port: 1965,
hostname: "localhost",
port: 1965,
}
func readconfig(configPath string) error {
@ -56,25 +71,39 @@ func readconfig(configPath string) error {
return err
}
for _, serve := range config.Serve {
if serve.Path == "" {
log.Fatal("path must be specified in serve entry")
} else if (serve.Root != "" && (serve.Proxy != "" || serve.Command != "")) ||
(serve.Proxy != "" && (serve.Root != "" || serve.Command != "")) ||
(serve.Command != "" && (serve.Root != "" || serve.Proxy != "")) {
log.Fatal("only one root, reverse proxy or command may specified in a serve entry")
split := strings.Split(config.Listen, ":")
if len(split) != 2 {
config.hostname = config.Listen
config.Listen += ":1965"
} else {
config.hostname = split[0]
config.port, err = strconv.Atoi(split[1])
if err != nil {
log.Fatalf("invalid port specified: %s", err)
}
}
if serve.Path[0] == '^' {
serve.r = regexp.MustCompile(serve.Path)
} else if serve.Path[len(serve.Path)-1] == '/' {
serve.Path = serve.Path[:len(serve.Path)-1]
}
for _, host := range config.Hosts {
for _, serve := range host.Paths {
if serve.Path == "" {
log.Fatal("path must be specified in serve entry")
} else if (serve.Root != "" && (serve.Proxy != "" || serve.Command != "")) ||
(serve.Proxy != "" && (serve.Root != "" || serve.Command != "")) ||
(serve.Command != "" && (serve.Root != "" || serve.Proxy != "")) {
log.Fatal("only one root, reverse proxy or command may specified in a serve entry")
}
if serve.Command != "" {
serve.cmd, err = shellquote.Split(serve.Command)
if err != nil {
log.Fatalf("failed to parse command %s: %s", serve.cmd, err)
if serve.Path[0] == '^' {
serve.r = regexp.MustCompile(serve.Path)
} else if serve.Path[len(serve.Path)-1] == '/' {
serve.Path = serve.Path[:len(serve.Path)-1]
}
if serve.Command != "" {
serve.cmd, err = shellquote.Split(serve.Command)
if err != nil {
log.Fatalf("failed to parse command %s: %s", serve.cmd, err)
}
}
}
}

20
main.go
View file

@ -1,6 +1,7 @@
package main
import (
"crypto/tls"
"flag"
"log"
"os"
@ -30,15 +31,24 @@ func main() {
log.Fatalf("failed to read configuration file at %s: %v\nSee CONFIGURATION.md for information on configuring twins", *configFile, err)
}
if config.Hostname == "" || config.Port <= 0 {
if config.hostname == "" || config.port <= 0 {
log.Fatal("hostname and port must be specified")
}
if config.Cert == "" || config.Key == "" {
log.Fatal("certificate file and private key must be specified (gemini requires TLS for all connections)")
if len(config.Certificates) == 0 {
log.Fatal("at least one certificate must be specified (gemini requires TLS for all connections)")
}
log.Printf("twins running on port %d", config.Port)
var certificates []tls.Certificate
for _, cert := range config.Certificates {
cert, err := tls.LoadX509KeyPair(cert.Cert, cert.Key)
if err != nil {
log.Fatalf("failed to load certificate: %s", err)
}
certificates = append(certificates, cert)
}
listen(config.Hostname, config.Port, config.Cert, config.Key)
log.Printf("twins running on %s:%d", config.hostname, config.port)
listen(config.Listen, certificates)
}

93
server.go
View file

@ -48,7 +48,7 @@ func writeStatus(c net.Conn, code int) {
writeHeader(c, code, meta)
}
func serveFile(c net.Conn, filePath string) {
func serveFile(c net.Conn, requestData, filePath string) {
fi, err := os.Stat(filePath)
if os.IsNotExist(err) {
writeStatus(c, gemini.StatusNotFound)
@ -59,6 +59,13 @@ func serveFile(c net.Conn, filePath string) {
}
if mode := fi.Mode(); mode.IsDir() {
if requestData[len(requestData)-1] != '/' {
// Add trailing slash
log.Println(requestData)
writeHeader(c, gemini.StatusRedirectPermanent, requestData+"/")
return
}
_, err := os.Stat(path.Join(filePath, "index.gemini"))
if err == nil {
filePath = path.Join(filePath, "index.gemini")
@ -200,6 +207,7 @@ func handleConn(c net.Conn) {
requestData = scanner.Text()
}
if err := scanner.Err(); err != nil {
log.Println(scanner.Text(), "FAILED")
writeStatus(c, gemini.StatusBadRequest)
return
}
@ -214,7 +222,13 @@ func handleConn(c net.Conn) {
}
request, err := url.Parse(requestData)
if err != nil || request.Hostname() == "" || strings.ContainsRune(request.Hostname(), ' ') {
if err != nil {
writeStatus(c, gemini.StatusBadRequest)
return
}
requestHostname := request.Hostname()
if requestHostname == "" || strings.ContainsRune(requestHostname, ' ') {
writeStatus(c, gemini.StatusBadRequest)
return
}
@ -230,7 +244,7 @@ func handleConn(c net.Conn) {
if request.Scheme == "" {
request.Scheme = "gemini"
}
if request.Scheme != "gemini" || request.Hostname() != config.Hostname || (requestPort > 0 && requestPort != config.Port) {
if request.Scheme != "gemini" || (requestPort > 0 && requestPort != config.port) {
writeStatus(c, gemini.StatusProxyRequestRefused)
}
@ -246,35 +260,47 @@ func handleConn(c net.Conn) {
strippedPath = strippedPath[1:]
}
for _, serve := range config.Serve {
if serve.Proxy != "" {
if serve.r != nil && serve.r.Match(pathBytes) {
serveProxy(c, requestData, serve.Proxy)
return
} else if serve.r == nil && strings.HasPrefix(request.Path, serve.Path) {
serveProxy(c, requestData, serve.Proxy)
return
}
} else if serve.cmd != nil {
if serve.r != nil && serve.r.Match(pathBytes) {
serveCommand(c, serve.cmd)
return
} else if serve.r == nil && strings.HasPrefix(request.Path, serve.Path) {
serveCommand(c, serve.cmd)
return
}
var matchedHost bool
for _, host := range config.Hosts {
if requestHostname != host.Name {
continue
}
matchedHost = true
if serve.r != nil && serve.r.Match(pathBytes) {
serveFile(c, path.Join(serve.Root, strippedPath))
return
} else if serve.r == nil && strings.HasPrefix(request.Path, serve.Path) {
serveFile(c, path.Join(serve.Root, strippedPath[len(serve.Path)-1:]))
return
for _, serve := range host.Paths {
if serve.Proxy != "" {
if serve.r != nil && serve.r.Match(pathBytes) {
serveProxy(c, requestData, serve.Proxy)
return
} else if serve.r == nil && strings.HasPrefix(request.Path, serve.Path) {
serveProxy(c, requestData, serve.Proxy)
return
}
} else if serve.cmd != nil {
if serve.r != nil && serve.r.Match(pathBytes) {
serveCommand(c, serve.cmd)
return
} else if serve.r == nil && strings.HasPrefix(request.Path, serve.Path) {
serveCommand(c, serve.cmd)
return
}
}
if serve.r != nil && serve.r.Match(pathBytes) {
serveFile(c, requestData, path.Join(serve.Root, strippedPath))
return
} else if serve.r == nil && strings.HasPrefix(request.Path, serve.Path) {
serveFile(c, requestData, path.Join(serve.Root, strippedPath[len(serve.Path)-1:]))
return
}
}
}
writeStatus(c, gemini.StatusNotFound)
if matchedHost {
writeStatus(c, gemini.StatusNotFound)
} else {
writeStatus(c, gemini.StatusProxyRequestRefused)
}
}
func handleListener(l net.Listener) {
@ -288,19 +314,14 @@ func handleListener(l net.Listener) {
}
}
func listen(hostname string, port int, certFile, keyFile string) {
cert, err := tls.LoadX509KeyPair(certFile, keyFile)
if err != nil {
log.Fatalf("failed to load certificate: %s", err)
}
func listen(address string, certificates []tls.Certificate) {
tlsConfig := &tls.Config{
Certificates: []tls.Certificate{cert},
Certificates: certificates,
}
listener, err := tls.Listen("tcp", fmt.Sprintf("%s:%d", hostname, port), tlsConfig)
listener, err := tls.Listen("tcp", address, tlsConfig)
if err != nil {
log.Fatalf("failed to listen on %s:%d: %s", hostname, port, err)
log.Fatalf("failed to listen on %s: %s", address, err)
}
handleListener(listener)