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package glaze
import (
"context"
"errors"
"flag"
"io"
"io/fs"
"log"
"net"
"net/http"
"net/url"
"os"
"strings"
"github.com/pkg/xattr"
)
const TRY_INDEX_HTML_XATTR = "user.glaze.directory-listing"
type PatternPath struct {}
func (i *PatternPath) String() string {
return "FIXME"
}
func proxyHandler(path string) http.Handler {
target, err := url.Parse(path)
if err != nil {
log.Fatal(err)
}
target.Scheme = "http"
target.Host = "localhost"
httpClient := http.Client {
Transport: &http.Transport {
DialContext: func(_ context.Context, _ string, _ string) (net.Conn, error) {
return net.Dial("unix", path)
},
},
}
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
r.URL.Scheme = target.Scheme
r.URL.Host = target.Host
r.RequestURI = ""
response, err := httpClient.Do(r)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
log.Println(err)
return
}
for k, vArr := range response.Header {
for _, v := range vArr {
w.Header().Add(k, v)
}
}
w.WriteHeader(response.StatusCode)
io.Copy(w, response.Body)
})
}
func fileHandler(path string) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fileHandle, err := os.Open(path)
if err != nil {
http.Error(w, "Not Founde", http.StatusNotFound)
return
}
fileInfo, err := fileHandle.Stat()
if err != nil {
http.Error(w, "Server Errore", http.StatusInternalServerError)
return
}
http.ServeContent(w, r, fileInfo.Name(), fileInfo.ModTime(), fileHandle)
})
}
func directoryHandler(path string) http.Handler {
// FIXME: return 301/302 on symlink
return http.FileServer(http.Dir(path))
}
func adjustPattern(pattern string) string {
if pattern == "*" {
return "/"
} else if strings.HasSuffix(pattern, "*") {
return pattern[0:len(pattern) - 1]
} else {
return pattern
// FIXME: when on Go 1.22, use:
// return pattern + "{$}"
}
}
func registerHandler(tag string, pattern string, handler http.Handler) {
http.Handle(
pattern,
logged(
tag,
http.StripPrefix(
pattern,
handler,
),
),
)
}
func registerPattern(fileInfo fs.FileInfo, pattern string, path string) {
if fileInfo.Mode().Type() == fs.ModeSocket {
registerHandler("proxy", pattern, proxyHandler(path))
} else if !fileInfo.Mode().IsDir() {
registerHandler("file", pattern, fileHandler(path))
} else {
registerHandler("directory", pattern, directoryHandler(path))
data, err := xattr.Get(path, TRY_INDEX_HTML_XATTR)
if err != nil {
log.Fatal(err)
}
if string(data) == "true" {
indexPattern := pattern
if !strings.HasSuffix(indexPattern, "/") {
indexPattern += "/"
}
indexPattern += "index.html"
registerHandler("index-html-file", indexPattern, fileHandler(path + "/index.html"))
}
}
}
func (_ *PatternPath) Set(value string) error {
arr := strings.Split(value, ":")
if len(arr) != 2 {
return errors.New("Bad value for path pattern: " + value)
}
pattern := adjustPattern(arr[0])
path := arr[1]
fileInfo, err := os.Stat(path)
if err != nil {
return err
}
registerPattern(fileInfo, pattern, path)
return nil
}
func logged(tag string, next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
log.Printf("%s: %s %s\n", tag, r.Method, r.URL.Path)
next.ServeHTTP(w, r)
})
}
// FIXME: log to json
func Main() {
var myFlags PatternPath
flag.Var(&myFlags, "P", "URL:PATH pattern")
flag.Parse()
if flag.NArg() != 1 {
flag.Usage()
os.Exit(2)
}
listenPath := flag.Arg(0)
listener, err := net.Listen("unix", listenPath)
if err != nil {
log.Fatal("Failed to net.listen(): " + err.Error())
}
server := http.Server {}
err = server.Serve(listener)
if err != nil {
log.Fatal(err)
}
}
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