81 lines
1.5 KiB
Go
81 lines
1.5 KiB
Go
package main
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import (
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"errors"
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"flag"
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"io"
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"log"
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"math/rand"
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"net/http"
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"os"
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"path"
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"time"
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)
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const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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func init() {
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rand.Seed(time.Now().UnixNano())
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}
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// RandString taken from https://stackoverflow.com/a/31832326
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func RandString(n int) string {
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b := make([]byte, n)
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for i := range b {
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b[i] = letterBytes[rand.Int63()%int64(len(letterBytes))]
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}
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return string(b)
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}
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var dataDirFlag = flag.String("dataDir", "/tmp", "directory for files")
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var domainFlag = flag.String("domain", "http://localhost:8085", "base domain")
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var bindFlag = flag.String("bind", ":8085", "host and port to bind")
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func main() {
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flag.Parse()
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h := &Handler{
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DataDir: *dataDirFlag,
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Domain: *domainFlag,
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}
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log.Println("listening")
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panic(http.ListenAndServe(*bindFlag, h))
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}
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type Handler struct {
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DataDir string
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Domain string
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}
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func (h *Handler) ServeHTTP(wr http.ResponseWriter, req *http.Request) {
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if req.Method != "POST" {
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return
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}
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name := RandString(8)
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for {
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_, err := os.Stat(path.Join(h.DataDir, name))
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if errors.Is(err, os.ErrNotExist) {
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break
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}
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name = RandString(8)
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}
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file, err := os.OpenFile(path.Join(h.DataDir, name), os.O_CREATE|os.O_RDWR, 0o644)
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if err != nil {
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log.Println("error:", err)
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return
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}
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defer file.Close()
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defer req.Body.Close()
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_, err = io.Copy(file, req.Body)
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if err != nil {
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log.Println("error:", err)
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return
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}
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log.Println("uploaded as", name)
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wr.Write([]byte(h.Domain + "/" + name + "\n"))
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}
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