61 lines
1.4 KiB
Go
61 lines
1.4 KiB
Go
// Copyright 2017 Frédéric Guillot. All rights reserved.
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// Use of this source code is governed by the Apache 2.0
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// license that can be found in the LICENSE file.
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package ui // import "miniflux.app/ui"
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import (
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"encoding/base64"
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"errors"
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"io/ioutil"
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"net/http"
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"time"
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"miniflux.app/crypto"
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"miniflux.app/http/client"
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"miniflux.app/http/request"
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"miniflux.app/http/response"
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"miniflux.app/http/response/html"
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)
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func (h *handler) imageProxy(w http.ResponseWriter, r *http.Request) {
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// If we receive a "If-None-Match" header, we assume the image is already stored in browser cache.
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if r.Header.Get("If-None-Match") != "" {
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w.WriteHeader(http.StatusNotModified)
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return
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}
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encodedURL := request.RouteStringParam(r, "encodedURL")
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if encodedURL == "" {
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html.BadRequest(w, r, errors.New("No URL provided"))
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return
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}
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decodedURL, err := base64.URLEncoding.DecodeString(encodedURL)
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if err != nil {
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html.BadRequest(w, r, errors.New("Unable to decode this URL"))
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return
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}
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clt := client.New(string(decodedURL))
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resp, err := clt.Get()
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if err != nil {
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html.ServerError(w, r, err)
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return
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}
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if resp.HasServerFailure() {
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html.NotFound(w, r)
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return
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}
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body, _ := ioutil.ReadAll(resp.Body)
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etag := crypto.HashFromBytes(body)
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response.New(w ,r).WithCaching(etag, 72*time.Hour, func(b *response.Builder) {
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b.WithHeader("Content-Type", resp.ContentType)
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b.WithBody(body)
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b.WithoutCompression()
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b.Write()
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})
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}
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