105 行
2.7 KiB
Go
105 行
2.7 KiB
Go
package main
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import (
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"fmt"
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"io"
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"log"
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"net/http"
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"strings"
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"time"
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)
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var sofname = "imgproxy"
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var version = "1.1.0"
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var client = http.Client{
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Timeout: time.Second * 30,
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}
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func fetchImage(curl string, nurl string) (*http.Response, error) {
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req, err := http.NewRequest("GET", curl, nil)
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if err != nil {
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return nil, err
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}
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resp, err := client.Do(req)
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if err != nil {
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return nil, err
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}
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// 画像だけをプロクシーする様に
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ctype := resp.Header.Get("Content-Type")
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if ctype != "image/jpeg" && ctype != "image/png" && ctype != "image/gif" && ctype != "image/tga" && ctype != "image/targa" && ctype != "image/webp" {
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return nil, fmt.Errorf("画像ではありません: %s", ctype)
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}
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return resp, nil
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}
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func serveImage(w http.ResponseWriter, img *http.Response) {
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w.Header().Set("Content-Type", img.Header.Get("Content-Type"))
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w.Header().Set("Content-Length", fmt.Sprint(img.ContentLength))
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if _, err := io.Copy(w, img.Body); err != nil {
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log.Printf("画像を出力に失敗: %v", err)
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}
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}
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func pixivImg(w http.ResponseWriter, req *http.Request) {
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resp, err := client.Do(req)
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if err != nil {
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log.Printf("Pixivから画像を受取に失敗: %v", err)
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http.Error(w, "Pixivから画像を受取に失敗。", http.StatusInternalServerError)
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return
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}
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defer resp.Body.Close()
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serveImage(w, resp)
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}
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func imgproxy(w http.ResponseWriter, r *http.Request) {
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// URLを修正
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nurl := r.URL.Path[1:]
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if nurl == "" {
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fmt.Fprintf(
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w,
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`<style>body { background: #1b0326; color: #f545f5; } a { color: #ff88ff; }</style><p style="text-align: center;"><a href="https://technicalsuwako.moe/blog/%s-%s">%s-%s</a> | <a href="https://gitler.moe/suwako/%s">Git</a> | <a href="https://076.moe/">０７６</a></p>`,
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sofname,
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strings.ReplaceAll(version, ".", ""),
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sofname,
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version,
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sofname,
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)
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return
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}
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// Pixivの場合
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if strings.Contains(nurl, "s.pximg.net") || strings.Contains(nurl, "i.pximg.net") {
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req, _ := http.NewRequest("GET", "https://" + nurl, nil)
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req.Header.Set("Referer", "https://www.pixiv.net/")
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pixivImg(w, req)
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return
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}
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var img *http.Response
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var err error
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// HTTPリク
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img, err = fetchImage("https://" + nurl, nurl)
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if err != nil {
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img, err = fetchImage("http://" + nurl, nurl)
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}
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if err != nil {
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log.Printf("画像を受け取りに失敗: %v", err)
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http.Error(w, "画像を受け取りに失敗。", http.StatusInternalServerError)
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return
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}
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defer img.Body.Close()
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serveImage(w, img)
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}
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func main() {
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http.HandleFunc("/", imgproxy)
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fmt.Println("http://0.0.0.0:9810 でサーバーを実行中。終了するには、CTRL+Cを押して下さい。")
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http.ListenAndServe("0.0.0.0:9810", nil)
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}
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