mirror of https://github.com/Xhofe/alist
103 lines
2.3 KiB
Go
103 lines
2.3 KiB
Go
package common
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import (
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"errors"
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"fmt"
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"github.com/Xhofe/alist/drivers/base"
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"github.com/Xhofe/alist/model"
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log "github.com/sirupsen/logrus"
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"io"
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"io/ioutil"
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"net/http"
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"net/url"
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"os"
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"strconv"
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"strings"
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)
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var HttpClient = &http.Client{}
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func Proxy(w http.ResponseWriter, r *http.Request, link *base.Link, file *model.File) error {
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// 本机读取数据
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var err error
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if link.Data != nil {
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//c.Data(http.StatusOK, "application/octet-stream", link.Data)
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defer func() {
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_ = link.Data.Close()
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}()
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w.Header().Set("Content-Type", "application/octet-stream")
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w.Header().Set("Content-Disposition", fmt.Sprintf(`attachment; filename=%s`, url.QueryEscape(file.Name)))
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w.Header().Set("Content-Length", strconv.FormatInt(file.Size, 10))
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if link.Header != nil {
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for h, val := range link.Header {
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w.Header()[h] = val
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}
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}
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if link.Status == 0 {
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w.WriteHeader(http.StatusOK)
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} else {
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w.WriteHeader(link.Status)
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}
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_, err = io.Copy(w, link.Data)
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if err != nil {
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return err
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}
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return nil
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}
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// 本机文件直接返回文件
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if link.FilePath != "" {
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f, err := os.Open(link.FilePath)
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if err != nil {
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return err
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}
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defer func() {
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_ = f.Close()
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}()
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fileStat, err := os.Stat(link.FilePath)
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if err != nil {
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return err
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}
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w.Header().Set("Content-Disposition", fmt.Sprintf(`attachment; filename=%s`, url.QueryEscape(file.Name)))
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http.ServeContent(w, r, file.Name, fileStat.ModTime(), f)
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return nil
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} else {
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req, err := http.NewRequest(r.Method, link.Url, nil)
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if err != nil {
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return err
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}
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for h, val := range r.Header {
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if strings.ToLower(h) == "authorization" {
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continue
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}
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req.Header[h] = val
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}
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log.Debugf("req headers: %+v", r.Header)
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for _, header := range link.Headers {
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req.Header.Set(header.Name, header.Value)
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}
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res, err := HttpClient.Do(req)
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if err != nil {
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return err
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}
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defer func() {
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_ = res.Body.Close()
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}()
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log.Debugf("proxy status: %d", res.StatusCode)
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for h, v := range res.Header {
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w.Header()[h] = v
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}
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w.WriteHeader(res.StatusCode)
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if res.StatusCode >= 400 {
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all, _ := ioutil.ReadAll(res.Body)
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msg := string(all)
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log.Debugln(msg)
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return errors.New(msg)
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}
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_, err = io.Copy(w, res.Body)
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if err != nil {
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return err
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}
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return nil
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}
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}
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