63 lines
1.5 KiB
Go
63 lines
1.5 KiB
Go
package handlers
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import (
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"context"
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"fmt"
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"io"
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"mime"
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"net/http"
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"strings"
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"github.com/gorilla/mux"
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"github.com/rramiachraf/dumb/utils"
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"github.com/rramiachraf/dumb/views"
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)
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func isValidExt(ext string) bool {
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valid := []string{"jpg", "jpeg", "png", "gif"}
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for _, c := range valid {
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if strings.ToLower(ext) == c {
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return true
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}
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}
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return false
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}
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func imageProxy(l *utils.Logger) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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v := mux.Vars(r)
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f := v["filename"]
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ext := v["ext"]
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if !isValidExt(ext) {
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w.WriteHeader(http.StatusBadRequest)
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views.ErrorPage(400, "something went wrong").Render(context.Background(), w)
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return
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}
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// first segment of URL resize the image to reduce bandwith usage.
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url := fmt.Sprintf("https://t2.genius.com/unsafe/300x300/https://images.genius.com/%s.%s", f, ext)
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res, err := utils.SendRequest(url)
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if err != nil {
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l.Error(err.Error())
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w.WriteHeader(http.StatusInternalServerError)
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views.ErrorPage(500, "cannot reach Genius servers").Render(context.Background(), w)
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return
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}
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if res.StatusCode != http.StatusOK {
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w.WriteHeader(http.StatusInternalServerError)
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views.ErrorPage(500, "something went wrong").Render(context.Background(), w)
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return
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}
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w.Header().Set("Content-type", mime.TypeByExtension("."+ext))
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w.Header().Add("Cache-Control", "max-age=1296000")
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if _, err = io.Copy(w, res.Body); err != nil {
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l.Error("unable to write image, %s", err.Error())
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}
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}
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}
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