Initial commit

LICENSE

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+MIT License
+
+Copyright (c) 2020 Simon Ser
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# tlstunnel
+
+A TLS reverse proxy.
+
+## License
+
+MIT

config.go

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+package main
+
+import (
+	"os"
+	"io"
+	"bufio"
+	"fmt"
+
+	"github.com/google/shlex"
+)
+
+type Directive struct {
+	Params []string
+	Children []*Directive
+}
+
+func Load(path string) ([]*Directive, error) {
+	f, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	return Parse(f)
+}
+
+func Parse(r io.Reader) ([]*Directive, error) {
+	scanner := bufio.NewScanner(r)
+
+	var directives []*Directive
+	var cur *Directive
+	for scanner.Scan() {
+		l := scanner.Text()
+		words, err := shlex.Split(l)
+		if err != nil {
+			return directives, fmt.Errorf("failed to parse config file: %v", err)
+		} else if len(words) == 0 {
+			continue
+		}
+
+		if len(words) == 1 && l[len(l) - 1] == '}' {
+			if cur == nil {
+				return nil, fmt.Errorf("unexpected '}'")
+			}
+			cur = nil
+			continue
+		}
+
+		var d *Directive
+		if words[len(words) - 1] == "{" && l[len(l) - 1] == '{' {
+			d = &Directive{
+				Params: words[:len(words) - 1],
+			}
+			cur = d
+			directives = append(directives, d)
+		} else {
+			d = &Directive{Params: words}
+			if cur != nil {
+				cur.Children = append(cur.Children, d)
+			} else {
+				directives = append(directives, d)
+			}
+		}
+	}
+	if err := scanner.Err(); err != nil {
+		return nil, fmt.Errorf("failed to read config file: %v", err)
+	}
+
+	return directives, nil
+}

go.mod

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+module git.sr.ht/~emersion/tlstunnel
+
+go 1.15
+
+require github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510

go.sum

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+github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 h1:El6M4kTTCOh6aBiKaUGG7oYTSPP8MxqL4YI3kZKwcP4=
+github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510/go.mod h1:pupxD2MaaD3pAXIBCelhxNneeOaAeabZDe5s4K6zSpQ=

main.go

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+package main
+
+import (
+	"log"
+)
+
+func main() {
+	directives, err := Load("config")
+	if err != nil {
+		log.Fatalf("failed to load config file: %v", err)
+	}
+	_ = directives
+}