41 lines
1022 B
Go
41 lines
1022 B
Go
package webseed
|
|
|
|
import (
|
|
"fmt"
|
|
"net/http"
|
|
"net/url"
|
|
"path"
|
|
"strings"
|
|
|
|
"github.com/anacrolix/torrent/metainfo"
|
|
)
|
|
|
|
func trailingPath(infoName string, pathComps []string) string {
|
|
return path.Join(
|
|
func() (ret []string) {
|
|
for _, comp := range append([]string{infoName}, pathComps...) {
|
|
ret = append(ret, url.QueryEscape(comp))
|
|
}
|
|
return
|
|
}()...,
|
|
)
|
|
}
|
|
|
|
// Creates a request per BEP 19.
|
|
func NewRequest(url_ string, fileIndex int, info *metainfo.Info, offset, length int64) (*http.Request, error) {
|
|
fileInfo := info.UpvertedFiles()[fileIndex]
|
|
if strings.HasSuffix(url_, "/") {
|
|
// BEP specifies that we append the file path. We need to escape each component of the path
|
|
// for things like spaces and '#'.
|
|
url_ += trailingPath(info.Name, fileInfo.Path)
|
|
}
|
|
req, err := http.NewRequest(http.MethodGet, url_, nil)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if offset != 0 || length != fileInfo.Length {
|
|
req.Header.Set("Range", fmt.Sprintf("bytes=%d-%d", offset, offset+length-1))
|
|
}
|
|
return req, nil
|
|
}
|