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| package main | |
| import ( | |
| "crypto/sha1" | |
| "fmt" | |
| "io" | |
| "mime/multipart" | |
| "net/http" | |
| "os" | |
| "path/filepath" | |
| ) | |
| const indexPage = ` | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="UTF-8"> | |
| </head> | |
| <body> | |
| <form action="/" method="POST" enctype="multipart/form-data"> | |
| <input type="file" name="image1"> | |
| <input type="submit"> | |
| </form> | |
| </body> | |
| </html> | |
| ` | |
| func main() { | |
| http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { | |
| if r.Method == "GET" { | |
| if r.URL.Path == "/" { | |
| fmt.Fprintf(w, indexPage) | |
| } else { | |
| if f, e := filepath.Abs(r.URL.Path); e == nil { | |
| http.ServeFile(w, r, f) | |
| } else { | |
| http.Error(w, e.Error(), http.StatusNotFound) | |
| } | |
| } | |
| } else { | |
| var e error | |
| var f io.Writer | |
| var m multipart.File | |
| var hex string | |
| if m, _, e = r.FormFile("image1"); e == nil { | |
| sha1h := sha1.New() | |
| if _, e = io.Copy(sha1h, m); e == nil { | |
| m.Seek(0, os.SEEK_SET) | |
| hex = fmt.Sprintf("%x", sha1h.Sum(nil)) | |
| if f, e = os.Create(hex + ".png"); e == nil { | |
| _, e = io.Copy(f, m) | |
| } | |
| } | |
| } | |
| if e == nil { | |
| http.Redirect(w, r, hex+".png", 302) | |
| } else { | |
| http.Error(w, e.Error(), http.StatusInternalServerError) | |
| } | |
| } | |
| }) | |
| http.ListenAndServe(":8080", nil) | |
| } |
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