131 lines
2.4 KiB
Go
131 lines
2.4 KiB
Go
package main
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import (
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"archive/tar"
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"bytes"
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"compress/gzip"
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"io"
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"log"
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"net"
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"net/http"
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"os"
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"strings"
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)
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func Middleware(next http.Handler) http.Handler {
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return http.HandlerFunc(
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func(w http.ResponseWriter, r *http.Request) {
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defer func() {
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r := recover()
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if r != nil {
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log.Println("panic", r)
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w.WriteHeader(500)
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}
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}()
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abort := false
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if flagAllow != "" {
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if GetIP(r) != flagAllow {
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HttpWriter(w, 403, "permission denyed")
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abort = true
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}
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}
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if !abort {
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next.ServeHTTP(w, r)
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}
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log.Printf("%s %s %s %s\n", GetIP(r), r.Method, r.URL, r.Header.Get("User-Agent"))
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},
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)
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}
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func bundle(buf io.Writer, paths []string, flat bool) error {
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gw := gzip.NewWriter(buf)
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defer gw.Close()
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tw := tar.NewWriter(gw)
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defer tw.Close()
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for _, file := range paths {
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if err := func(file string) error {
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f, err := os.Open(file)
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if err != nil {
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return err
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}
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defer f.Close()
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info, err := f.Stat()
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if err != nil {
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return err
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}
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header, err := tar.FileInfoHeader(info, info.Name())
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if err != nil {
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return err
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}
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// Use full path as name (FileInfoHeader only takes the basename)
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// If we don't do this the directory strucuture would
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// not be preserved
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// https://golang.org/src/archive/tar/common.go?#L626
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if !flat {
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if !strings.HasPrefix(file, "/") {
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file = "configui/" + file
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} else {
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file = "configui" + file
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}
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header.Name = file
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}
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// Write file header to the tar archive
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err = tw.WriteHeader(header)
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if err != nil {
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return err
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}
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// Copy file content to tar archive
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_, err = io.Copy(tw, f)
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if err != nil {
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return err
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}
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return nil
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}(file); err != nil {
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return err
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}
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}
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return nil
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}
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func HttpWriter(w http.ResponseWriter, status int, errStr string) {
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w.WriteHeader(status)
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w.Write([]byte(errStr))
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}
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func GetIP(r *http.Request) string {
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ip := r.Header.Get("X-Real-Ip")
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if ip == "" {
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ips := r.Header.Get("X-Forwarded-For")
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ipArr := strings.Split(ips, ",")
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ip = strings.Trim(ipArr[len(ipArr)-1], " ")
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}
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if ip == "" {
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var err error
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ip, _, err = net.SplitHostPort(r.RemoteAddr)
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if err != nil {
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ip = r.RemoteAddr
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}
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}
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return ip
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}
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func serve(w http.ResponseWriter, name string, data interface{}) error {
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buf := &bytes.Buffer{}
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err := tmpl.ExecuteTemplate(buf, "home", data)
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if err != nil {
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HttpWriter(w, 500, err.Error())
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return err
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}
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_, err = w.Write(buf.Bytes())
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return err
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}
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