mirror of
https://github.com/truewhile/MeBox.git
synced 2026-09-28 03:06:38 +08:00
ShukeBta
293 lines
9.0 KiB
Go
293 lines
9.0 KiB
Go
package cloud
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import (
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"context"
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"encoding/base64"
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"encoding/xml"
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"fmt"
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"io"
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"net/http"
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"net/url"
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"path"
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"strconv"
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"strings"
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)
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func (p *cloudDrive2Provider) List(ctx context.Context, dir string) ([]FileEntry, error) {
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if err := p.validate(); err != nil {
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return nil, err
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}
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if p.typ == TypeOpenList && p.apiBase != nil && p.hasOpenListAPICredentials() {
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return p.listOpenListAPI(ctx, dir)
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}
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target := normalizeCloudDAVPath(dir)
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req, err := http.NewRequestWithContext(ctx, "PROPFIND", p.urlFor(target), strings.NewReader(cloudDAVPropfindBody))
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if err != nil {
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return nil, err
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}
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p.auth(req)
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req.Header.Set("Depth", "1")
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req.Header.Set("Content-Type", "application/xml; charset=utf-8")
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req.Header.Set("Accept", "application/xml,text/xml,*/*")
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resp, err := p.client.Do(req)
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if err != nil {
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return nil, decorateDAVTransportError(p.name, p.urlFor(target), err)
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}
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defer resp.Body.Close()
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if resp.StatusCode < 200 || resp.StatusCode >= 300 {
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return nil, p.decorateDAVStatusError(resp, target)
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}
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body, _ := io.ReadAll(io.LimitReader(resp.Body, 4<<20))
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var multi cloudDAVMultiStatus
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if err := xml.Unmarshal(body, &multi); err != nil {
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return nil, fmt.Errorf("%s: decode webdav: %w", p.name, err)
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}
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basePath := strings.TrimRight(p.base.EscapedPath(), "/")
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currentID := normalizeCloudDAVPath(target)
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out := make([]FileEntry, 0, len(multi.Responses))
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for _, item := range multi.Responses {
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entryPath, err := p.entryIDFromHref(item.Href, basePath)
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if err != nil || entryPath == "" || sameCloudDAVPath(entryPath, currentID) {
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continue
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}
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name := firstNonEmpty(item.PropStat.Prop.DisplayName, path.Base(strings.TrimRight(entryPath, "/")))
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if decoded, err := url.PathUnescape(name); err == nil {
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name = decoded
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}
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if name == "" || name == "." || name == "/" {
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continue
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}
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out = append(out, FileEntry{
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ID: entryPath,
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Name: name,
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IsDir: item.PropStat.Prop.ResourceType.Collection != nil || strings.HasSuffix(item.Href, "/"),
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Size: parseDAVSize(item.PropStat.Prop.ContentLength),
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})
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}
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return out, nil
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}
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func (p *cloudDrive2Provider) resolveCloudDAVRedirectDirect(ctx context.Context, fileRef string) (*DirectLink, error) {
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target := p.urlFor(fileRef)
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headers := map[string]string{
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"User-Agent": p.ua,
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}
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if p.token != "" {
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headers["Authorization"] = p.token
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} else if p.username != "" {
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headers["Authorization"] = "Basic " + base64.StdEncoding.EncodeToString([]byte(p.username+":"+p.password))
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}
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location, status, err := p.firstHTTPRedirectLocation(ctx, target, headers)
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if err != nil {
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return nil, decorateDAVTransportError(p.name, target, err)
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}
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if location == "" {
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return nil, fmt.Errorf("%s: WebDAV %s returned http %d without CDN Location; refusing WebDAV/proxy fallback for pure 302 playback", p.name, fileRef, status)
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}
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return &DirectLink{URL: location, Headers: nil, Proxy: false}, nil
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}
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func (p *cloudDrive2Provider) firstHTTPRedirectLocation(ctx context.Context, target string, headers map[string]string) (string, int, error) {
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, target, nil)
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if err != nil {
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return "", 0, err
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}
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req.Header.Set("Accept", "*/*")
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req.Header.Set("Accept-Encoding", "identity")
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req.Header.Set("Range", "bytes=0-0")
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if strings.TrimSpace(p.ua) != "" {
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req.Header.Set("User-Agent", p.ua)
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}
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for key, value := range headers {
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key = strings.TrimSpace(key)
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if key != "" && strings.TrimSpace(value) != "" {
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req.Header.Set(key, value)
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}
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}
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client := p.client
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if client == nil {
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client = http.DefaultClient
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}
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noFollow := *client
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noFollow.CheckRedirect = func(*http.Request, []*http.Request) error {
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return http.ErrUseLastResponse
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}
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resp, err := noFollow.Do(req)
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if err != nil {
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return "", 0, err
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}
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defer resp.Body.Close()
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status := resp.StatusCode
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if status >= 300 && status < 400 {
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rawLocation := strings.TrimSpace(resp.Header.Get("Location"))
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if rawLocation == "" {
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return "", status, fmt.Errorf("%s: upstream returned redirect http %d without Location", p.name, status)
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}
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location, err := resolveHTTPRedirectLocation(target, rawLocation)
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if err != nil {
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return "", status, err
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}
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return location, status, nil
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}
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return "", status, nil
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}
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func resolveHTTPRedirectLocation(baseURL, rawLocation string) (string, error) {
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rawLocation = strings.TrimSpace(rawLocation)
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if rawLocation == "" {
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return "", fmt.Errorf("empty redirect Location")
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}
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if strings.HasPrefix(rawLocation, "//") {
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base, err := url.Parse(baseURL)
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if err != nil || base.Scheme == "" {
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return "", fmt.Errorf("protocol-relative redirect Location without base scheme")
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}
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rawLocation = base.Scheme + ":" + rawLocation
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}
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location, err := url.Parse(rawLocation)
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if err != nil {
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return "", fmt.Errorf("invalid redirect Location: %w", err)
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}
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if location.IsAbs() {
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if location.Scheme != "http" && location.Scheme != "https" {
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return "", fmt.Errorf("unsupported redirect Location scheme %q", location.Scheme)
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}
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return location.String(), nil
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}
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base, err := url.Parse(baseURL)
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if err != nil {
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return "", fmt.Errorf("invalid redirect base URL: %w", err)
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}
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return base.ResolveReference(location).String(), nil
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}
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func (p *cloudDrive2Provider) auth(req *http.Request) {
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req.Header.Set("User-Agent", p.ua)
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if p.token != "" {
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req.Header.Set("Authorization", p.token)
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return
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}
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if p.username != "" {
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req.SetBasicAuth(p.username, p.password)
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}
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}
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func (p *cloudDrive2Provider) decorateDAVStatusError(resp *http.Response, target string) error {
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body, _ := io.ReadAll(io.LimitReader(resp.Body, 4096))
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detail := compactDAVErrorBody(string(body))
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if detail == "" {
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return fmt.Errorf("%s: list %s returned http %d", p.name, target, resp.StatusCode)
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}
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if resp.StatusCode == http.StatusMethodNotAllowed {
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return fmt.Errorf("%s: list %s returned http %d：%s；请确认填写的是 WebDAV 地址（通常以 /dav 结尾），并且桥接网盘已在 OpenList/CloudDrive2 内完成登录或 Cookie 保存", p.name, target, resp.StatusCode, detail)
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}
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if resp.StatusCode == http.StatusUnauthorized || resp.StatusCode == http.StatusForbidden {
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return fmt.Errorf("%s: list %s returned http %d：%s；请检查 WebDAV 用户名/密码、Authorization Token，或先在 OpenList/CloudDrive2 中保存对应网盘 Cookie", p.name, target, resp.StatusCode, detail)
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}
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return fmt.Errorf("%s: list %s returned http %d：%s", p.name, target, resp.StatusCode, detail)
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}
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func compactDAVErrorBody(raw string) string {
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raw = strings.TrimSpace(strings.ReplaceAll(raw, "\x00", ""))
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if raw == "" {
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return ""
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}
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raw = strings.Join(strings.Fields(raw), " ")
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if len([]rune(raw)) > 180 {
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return string([]rune(raw)[:180]) + "…"
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}
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return raw
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}
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func decorateDAVTransportError(name, target string, err error) error {
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if err == nil {
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return nil
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}
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message := err.Error()
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if strings.Contains(message, "server gave HTTP response to HTTPS client") {
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return fmt.Errorf("%s: %w；当前地址使用 https://，但服务端返回 HTTP。请改用 http:// 地址，例如 OpenList 默认 WebDAV 通常是 http://host:5244/dav/；如果必须使用 https，请在 OpenList 前配置反向代理和证书", name, err)
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}
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if strings.Contains(message, "first record does not look like a TLS handshake") {
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return fmt.Errorf("%s: %w；疑似把 HTTP 服务配置成了 https://，请检查 %s 的协议头", name, err, target)
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}
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return err
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}
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func (p *cloudDrive2Provider) urlFor(remotePath string) string {
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u := *p.base
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u.RawPath = ""
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basePath := strings.TrimRight(u.Path, "/")
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remote := strings.Trim(normalizeCloudDAVPath(remotePath), "/")
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switch {
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case basePath == "" || basePath == "/":
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if remote == "" {
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u.Path = "/"
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} else {
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u.Path = "/" + remote
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}
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case remote == "":
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u.Path = basePath
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default:
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u.Path = basePath + "/" + remote
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}
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return u.String()
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}
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func (p *cloudDrive2Provider) entryIDFromHref(href, basePath string) (string, error) {
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if href == "" {
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return "", nil
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}
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parsed, err := url.Parse(href)
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if err != nil {
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return "", err
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}
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hrefPath := parsed.EscapedPath()
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if hrefPath == "" {
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hrefPath = href
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}
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if basePath != "" && basePath != "/" {
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hrefPath = strings.TrimPrefix(hrefPath, basePath)
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}
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if decoded, err := url.PathUnescape(hrefPath); err == nil {
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hrefPath = decoded
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}
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return normalizeCloudDAVPath(hrefPath), nil
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}
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const cloudDAVPropfindBody = `<?xml version="1.0" encoding="utf-8"?>
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<d:propfind xmlns:d="DAV:">
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<d:prop>
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<d:displayname/>
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<d:getcontentlength/>
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<d:resourcetype/>
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</d:prop>
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</d:propfind>`
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type cloudDAVMultiStatus struct {
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Responses []cloudDAVResponse `xml:"response"`
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}
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type cloudDAVResponse struct {
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Href string `xml:"href"`
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PropStat cloudDAVPropStat `xml:"propstat"`
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}
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type cloudDAVPropStat struct {
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Prop cloudDAVProp `xml:"prop"`
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}
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type cloudDAVProp struct {
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DisplayName string `xml:"displayname"`
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ContentLength string `xml:"getcontentlength"`
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ResourceType cloudDAVResourceType `xml:"resourcetype"`
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}
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type cloudDAVResourceType struct {
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Collection *struct{} `xml:"collection"`
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}
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func parseDAVSize(raw string) int64 {
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n, _ := strconv.ParseInt(strings.TrimSpace(raw), 10, 64)
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return n
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}
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