57 lines
1.4 KiB
Go
57 lines
1.4 KiB
Go
package main
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import (
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"log"
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"net/http"
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"strings"
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)
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type imagesHandler struct {
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name string
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auth func(*http.Request) bool
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hndlr http.Handler
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getter func(fname string) (*Picture, error)
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}
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func ImagesHandler(name string, auth func(*http.Request) bool, hndlr http.Handler, getter func(fname string) (*Picture, error)) imagesHandler {
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return imagesHandler{name, auth, hndlr, getter}
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}
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func (i imagesHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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log.Printf("Handling %s %s request from %s: %s [%s]\n", r.Method, i.name, r.RemoteAddr, r.URL.Path, r.UserAgent())
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// Don't handle subdirectories
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if strings.Contains(r.URL.Path[1:], "/") {
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http.Error(w, "Image not found.", http.StatusBadRequest)
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return
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}
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// Refuse most methods
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if r.Method != "GET" && r.Method != "HEAD" {
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http.Error(w, "Method not allowed.", http.StatusMethodNotAllowed)
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return
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}
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// Refuse content
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if r.ContentLength != 0 {
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http.Error(w, "This request doesn't accept content.", http.StatusRequestEntityTooLarge)
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return
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}
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// Check rights
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if !i.auth(r) {
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w.Header().Set("WWW-Authenticate", "Basic realm=\"YouP0m\"")
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http.Error(w, "You are not allowed to perform this request.", http.StatusUnauthorized)
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return
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}
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// Search the picture
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if pict, err := i.getter(r.URL.Path[1:]); err != nil {
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http.Error(w, err.Error(), http.StatusNotFound)
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return
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} else {
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r.URL.Path = "/" + pict.path
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i.hndlr.ServeHTTP(w, r)
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}
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}
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