File size: 3,913 Bytes
619f93d | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 | package common
import (
"context"
"fmt"
"io"
"net/http"
"strings"
"maps"
"github.com/OpenListTeam/OpenList/v4/internal/conf"
"github.com/OpenListTeam/OpenList/v4/internal/model"
"github.com/OpenListTeam/OpenList/v4/internal/net"
"github.com/OpenListTeam/OpenList/v4/internal/sign"
"github.com/OpenListTeam/OpenList/v4/internal/stream"
"github.com/OpenListTeam/OpenList/v4/pkg/utils"
)
func Proxy(w http.ResponseWriter, r *http.Request, link *model.Link, file model.Obj) error {
// if link.MFile != nil {
// attachHeader(w, file, link)
// http.ServeContent(w, r, file.GetName(), file.ModTime(), link.MFile)
// return nil
// }
if link.Concurrency > 0 || link.PartSize > 0 {
attachHeader(w, file, link)
size := link.ContentLength
if size <= 0 {
size = file.GetSize()
}
rrf, _ := stream.GetRangeReaderFromLink(size, link)
if link.RangeReader == nil {
r = r.WithContext(context.WithValue(r.Context(), conf.RequestHeaderKey, r.Header))
}
return net.ServeHTTP(w, r, file.GetName(), file.ModTime(), size, &model.RangeReadCloser{
RangeReader: rrf,
})
}
if link.RangeReader != nil {
attachHeader(w, file, link)
size := link.ContentLength
if size <= 0 {
size = file.GetSize()
}
return net.ServeHTTP(w, r, file.GetName(), file.ModTime(), size, &model.RangeReadCloser{
RangeReader: link.RangeReader,
})
}
//transparent proxy
header := net.ProcessHeader(r.Header, link.Header)
res, err := net.RequestHttp(r.Context(), r.Method, header, link.URL)
if err != nil {
return err
}
defer res.Body.Close()
maps.Copy(w.Header(), res.Header)
w.WriteHeader(res.StatusCode)
if r.Method == http.MethodHead {
return nil
}
_, err = utils.CopyWithBuffer(w, &stream.RateLimitReader{
Reader: res.Body,
Limiter: stream.ServerDownloadLimit,
Ctx: r.Context(),
})
return err
}
func attachHeader(w http.ResponseWriter, file model.Obj, link *model.Link) {
fileName := file.GetName()
w.Header().Set("Content-Disposition", utils.GenerateContentDisposition(fileName))
w.Header().Set("Content-Type", utils.GetMimeType(fileName))
size := link.ContentLength
if size <= 0 {
size = file.GetSize()
}
w.Header().Set("Etag", GetEtag(file, size))
contentType := link.Header.Get("Content-Type")
if len(contentType) > 0 {
w.Header().Set("Content-Type", contentType)
} else {
w.Header().Set("Content-Type", utils.GetMimeType(fileName))
}
}
func GetEtag(file model.Obj, size int64) string {
hash := ""
for _, v := range file.GetHash().Export() {
if v > hash {
hash = v
}
}
if len(hash) > 0 {
return fmt.Sprintf(`"%s"`, hash)
}
// 参考nginx
return fmt.Sprintf(`"%x-%x"`, file.ModTime().Unix(), size)
}
func ProxyRange(ctx context.Context, link *model.Link, size int64) *model.Link {
if link.RangeReader == nil && !strings.HasPrefix(link.URL, GetApiUrl(ctx)+"/") {
if link.ContentLength > 0 {
size = link.ContentLength
}
rrf, err := stream.GetRangeReaderFromLink(size, link)
if err == nil {
return &model.Link{
RangeReader: rrf,
ContentLength: size,
}
}
}
return link
}
type InterceptResponseWriter struct {
http.ResponseWriter
io.Writer
}
func (iw *InterceptResponseWriter) Write(p []byte) (int, error) {
return iw.Writer.Write(p)
}
type WrittenResponseWriter struct {
http.ResponseWriter
written bool
}
func (ww *WrittenResponseWriter) Write(p []byte) (int, error) {
n, err := ww.ResponseWriter.Write(p)
if !ww.written && n > 0 {
ww.written = true
}
return n, err
}
func (ww *WrittenResponseWriter) IsWritten() bool {
return ww.written
}
func GenerateDownProxyURL(storage *model.Storage, reqPath string) string {
if storage.DownProxyURL == "" {
return ""
}
query := ""
if !storage.DisableProxySign {
query = "?sign=" + sign.Sign(reqPath)
}
return fmt.Sprintf("%s%s%s",
strings.Split(storage.DownProxyURL, "\n")[0],
utils.EncodePath(reqPath, true),
query,
)
}
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