chore: 初始化 Cloudreve 源码仓库
This commit is contained in:
@@ -0,0 +1,579 @@
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// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package webdav
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import (
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"bytes"
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"context"
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"encoding/json"
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"encoding/xml"
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"errors"
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"fmt"
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"github.com/cloudreve/Cloudreve/v4/application/dependency"
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"github.com/cloudreve/Cloudreve/v4/inventory"
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"github.com/cloudreve/Cloudreve/v4/inventory/types"
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"github.com/cloudreve/Cloudreve/v4/pkg/filemanager/fs"
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"github.com/cloudreve/Cloudreve/v4/pkg/filemanager/manager"
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"github.com/cloudreve/Cloudreve/v4/pkg/hashid"
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"github.com/gin-gonic/gin"
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"net/http"
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"strconv"
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"strings"
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"time"
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)
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//// 实现 webdav.DeadPropsHolder 接口，不能在models.file里面定义
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//func (file *FileDeadProps) DeadProps() (map[xml.Name]Property, error) {
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// return map[xml.Name]Property{
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// xml.Name{Space: "http://owncloud.org/ns", Local: "checksums"}: {
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// XMLName: xml.Name{
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// Space: "http://owncloud.org/ns", Local: "checksums",
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// },
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// InnerXML: []byte("<checksum>" + file.MetadataSerialized[model.ChecksumMetadataKey] + "</checksum>"),
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// },
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// }, nil
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//}
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//
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//func (file *FileDeadProps) Patch(proppatches []Proppatch) ([]Propstat, error) {
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// var (
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// stat Propstat
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// err error
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// )
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// stat.Status = http.StatusOK
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// for _, patch := range proppatches {
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// for _, prop := range patch.Props {
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// stat.Props = append(stat.Props, Property{XMLName: prop.XMLName})
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// if prop.XMLName.Space == "DAV:" && prop.XMLName.Local == "lastmodified" {
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// var modtimeUnix int64
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// modtimeUnix, err = strconv.ParseInt(string(prop.InnerXML), 10, 64)
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// if err == nil {
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// err = model.DB.Model(file).UpdateColumn("updated_at", time.Unix(modtimeUnix, 0)).Error
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// }
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// }
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// }
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// }
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// return []Propstat{stat}, err
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//}
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//
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//type FolderDeadProps struct {
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// *model.Folder
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//}
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//
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//func (folder *FolderDeadProps) DeadProps() (map[xml.Name]Property, error) {
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// return nil, nil
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//}
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//
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//func (folder *FolderDeadProps) Patch(proppatches []Proppatch) ([]Propstat, error) {
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// var (
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// stat Propstat
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// err error
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// )
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// stat.Status = http.StatusOK
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// for _, patch := range proppatches {
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// for _, prop := range patch.Props {
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// stat.Props = append(stat.Props, Property{XMLName: prop.XMLName})
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// if prop.XMLName.Space == "DAV:" && prop.XMLName.Local == "lastmodified" {
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// var modtimeUnix int64
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// modtimeUnix, err = strconv.ParseInt(string(prop.InnerXML), 10, 64)
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// if err == nil {
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// err = model.DB.Model(folder).UpdateColumn("updated_at", time.Unix(modtimeUnix, 0)).Error
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// }
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// }
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// }
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// }
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// return []Propstat{stat}, err
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//}
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const (
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DeadPropsMetadataPrefix = "dav:"
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SpaceNameSeparator = "|"
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)
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type (
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// DeadPropsStore implements DeadPropsHolder interface with metadata based store.
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metadataDeadProps struct {
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f fs.File
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fm manager.FileManager
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}
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DeadPropsStore struct {
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Lang string `json:"l,omitempty"`
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InnerXML []byte `json:"i,omitempty"`
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}
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)
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func (m *metadataDeadProps) DeadProps() (map[xml.Name]Property, error) {
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meta := m.f.Metadata()
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res := make(map[xml.Name]Property)
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for k, v := range meta {
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if !strings.HasPrefix(k, DeadPropsMetadataPrefix) {
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continue
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}
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spaceLocal := strings.SplitN(strings.TrimPrefix(k, DeadPropsMetadataPrefix), SpaceNameSeparator, 2)
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name := xml.Name{spaceLocal[0], spaceLocal[1]}
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propsStore := &DeadPropsStore{}
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if err := json.Unmarshal([]byte(v), propsStore); err != nil {
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return nil, err
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}
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res[name] = Property{
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XMLName: name,
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InnerXML: propsStore.InnerXML,
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Lang: propsStore.Lang,
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}
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}
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return res, nil
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}
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func (m *metadataDeadProps) Patch(ctx context.Context, proppatches []Proppatch) ([]Propstat, error) {
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metadataArgs := make([]fs.MetadataPatch, 0, len(proppatches))
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pstat := Propstat{Status: http.StatusOK}
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for _, patch := range proppatches {
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translateFn := func(p Property) (*fs.MetadataPatch, error) {
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val, err := json.Marshal(&DeadPropsStore{
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Lang: p.Lang,
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InnerXML: p.InnerXML,
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})
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if err != nil {
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return nil, err
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}
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return &fs.MetadataPatch{
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Key: DeadPropsMetadataPrefix + p.XMLName.Space + SpaceNameSeparator + p.XMLName.Local,
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Value: string(val),
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}, nil
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}
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if patch.Remove {
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translateFn = func(p Property) (*fs.MetadataPatch, error) {
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return &fs.MetadataPatch{
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Key: DeadPropsMetadataPrefix + p.XMLName.Space + SpaceNameSeparator + p.XMLName.Local,
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Remove: true,
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}, nil
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}
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}
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for _, prop := range patch.Props {
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pstat.Props = append(pstat.Props, Property{XMLName: prop.XMLName})
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patch, err := translateFn(prop)
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if err != nil {
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return nil, err
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}
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metadataArgs = append(metadataArgs, *patch)
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}
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}
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if err := m.fm.PatchMedata(ctx, []*fs.URI{m.f.Uri(false)}, metadataArgs...); err != nil {
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return nil, err
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}
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return []Propstat{pstat}, nil
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}
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type FileInfo interface {
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GetSize() uint64
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GetName() string
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ModTime() time.Time
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IsDir() bool
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GetPosition() string
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}
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// Proppatch describes a property update instruction as defined in RFC 4918.
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// See http://www.webdav.org/specs/rfc4918.html#METHOD_PROPPATCH
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type Proppatch struct {
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// Remove specifies whether this patch removes properties. If it does not
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// remove them, it sets them.
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Remove bool
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// Props contains the properties to be set or removed.
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Props []Property
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}
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// Propstat describes a XML propstat element as defined in RFC 4918.
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// See http://www.webdav.org/specs/rfc4918.html#ELEMENT_propstat
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type Propstat struct {
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// Props contains the properties for which Status applies.
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Props []Property
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// Status defines the HTTP status code of the properties in Prop.
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// Allowed values include, but are not limited to the WebDAV status
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// code extensions for HTTP/1.1.
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// http://www.webdav.org/specs/rfc4918.html#status.code.extensions.to.http11
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Status int
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// XMLError contains the XML representation of the optional error element.
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// XML content within this field must not rely on any predefined
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// namespace declarations or prefixes. If empty, the XML error element
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// is omitted.
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XMLError string
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// ResponseDescription contains the contents of the optional
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// responsedescription field. If empty, the XML element is omitted.
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ResponseDescription string
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}
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// makePropstats returns a slice containing those of x and y whose Props slice
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// is non-empty. If both are empty, it returns a slice containing an otherwise
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// zero Propstat whose HTTP status code is 200 OK.
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func makePropstats(x, y Propstat) []Propstat {
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pstats := make([]Propstat, 0, 2)
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if len(x.Props) != 0 {
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pstats = append(pstats, x)
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}
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if len(y.Props) != 0 {
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pstats = append(pstats, y)
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}
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if len(pstats) == 0 {
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pstats = append(pstats, Propstat{
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Status: http.StatusOK,
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})
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}
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return pstats
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}
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// DeadPropsHolder holds the dead properties of a resource.
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//
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// Dead properties are those properties that are explicitly defined. In
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// comparison, live properties, such as DAV:getcontentlength, are implicitly
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// defined by the underlying resource, and cannot be explicitly overridden or
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// removed. See the Terminology section of
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// http://www.webdav.org/specs/rfc4918.html#rfc.section.3
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//
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// There is a whitelist of the names of live properties. This package handles
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// all live properties, and will only pass non-whitelisted names to the Patch
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// method of DeadPropsHolder implementations.
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type DeadPropsHolder interface {
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// DeadProps returns a copy of the dead properties held.
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DeadProps() (map[xml.Name]Property, error)
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// Patch patches the dead properties held.
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//
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// Patching is atomic; either all or no patches succeed. It returns (nil,
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// non-nil) if an internal server error occurred, otherwise the Propstats
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// collectively contain one Property for each proposed patch Property. If
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// all patches succeed, Patch returns a slice of length one and a Propstat
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// element with a 200 OK HTTP status code. If none succeed, for reasons
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// other than an internal server error, no Propstat has status 200 OK.
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//
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// For more details on when various HTTP status codes apply, see
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// http://www.webdav.org/specs/rfc4918.html#PROPPATCH-status
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Patch(context.Context, []Proppatch) ([]Propstat, error)
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}
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// liveProps contains all supported, protected DAV: properties.
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var liveProps = map[xml.Name]struct {
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// findFn implements the propfind function of this property. If nil,
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// it indicates a hidden property.
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findFn func(context.Context, manager.FileManager, fs.File) (string, error)
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// dir is true if the property applies to directories.
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dir bool
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}{
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{Space: "DAV:", Local: "resourcetype"}: {
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findFn: findResourceType,
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dir: true,
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},
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{Space: "DAV:", Local: "displayname"}: {
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findFn: findDisplayName,
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dir: true,
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},
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{Space: "DAV:", Local: "getcontentlength"}: {
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findFn: findContentLength,
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dir: false,
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},
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{Space: "DAV:", Local: "getlastmodified"}: {
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findFn: findLastModified,
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// http://webdav.org/specs/rfc4918.html#PROPERTY_getlastmodified
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// suggests that getlastmodified should only apply to GETable
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// resources, and this package does not support GET on directories.
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//
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// Nonetheless, some WebDAV clients expect child directories to be
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// sortable by getlastmodified date, so this value is true, not false.
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// See golang.org/issue/15334.
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dir: true,
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},
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{Space: "DAV:", Local: "creationdate"}: {
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findFn: findCreationDate,
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dir: true,
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},
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{Space: "DAV:", Local: "getcontentlanguage"}: {
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findFn: nil,
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dir: false,
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},
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{Space: "DAV:", Local: "getcontenttype"}: {
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findFn: findContentType,
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dir: false,
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},
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{Space: "DAV:", Local: "getetag"}: {
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findFn: findETag,
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// findETag implements ETag as the concatenated hex values of a file's
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// modification time and size. This is not a reliable synchronization
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// mechanism for directories, so we do not advertise getetag for DAV
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// collections.
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dir: false,
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},
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// TODO: The lockdiscovery property requires LockSystem to list the
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// active locks on a resource.
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{Space: "DAV:", Local: "lockdiscovery"}: {},
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{Space: "DAV:", Local: "supportedlock"}: {
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findFn: findSupportedLock,
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dir: true,
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},
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{Space: "DAV:", Local: "quota-used-bytes"}: {
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findFn: findQuotaUsedBytes,
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dir: true,
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},
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{Space: "DAV:", Local: "quota-available-bytes"}: {
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findFn: findQuotaAvailableBytes,
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dir: true,
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},
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}
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// TODO(nigeltao) merge props and allprop?
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// Props returns the status of the properties named pnames for resource name.
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//
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// Each Propstat has a unique status and each property name will only be part
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// of one Propstat element.
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func props(c *gin.Context, file fs.File, fm manager.FileManager, pnames []xml.Name) ([]Propstat, error) {
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isDir := file.Type() == types.FileTypeFolder
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dph := &metadataDeadProps{
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f: file,
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fm: fm,
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}
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var (
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deadProps map[xml.Name]Property
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err error
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)
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deadProps, err = dph.DeadProps()
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if err != nil {
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return nil, err
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}
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pstatOK := Propstat{Status: http.StatusOK}
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pstatNotFound := Propstat{Status: http.StatusNotFound}
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for _, pn := range pnames {
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// If this file has dead properties, check if they contain pn.
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if dp, ok := deadProps[pn]; ok {
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pstatOK.Props = append(pstatOK.Props, dp)
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continue
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}
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// Otherwise, it must either be a live property or we don't know it.
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if prop := liveProps[pn]; prop.findFn != nil && (prop.dir || !isDir) {
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innerXML, err := prop.findFn(c, fm, file)
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if err != nil {
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if errors.Is(err, ErrNotImplemented) {
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pstatNotFound.Props = append(pstatNotFound.Props, Property{
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XMLName: pn,
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})
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continue
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}
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return nil, err
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}
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pstatOK.Props = append(pstatOK.Props, Property{
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XMLName: pn,
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InnerXML: []byte(innerXML),
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})
|
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} else {
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pstatNotFound.Props = append(pstatNotFound.Props, Property{
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XMLName: pn,
|
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})
|
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}
|
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}
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return makePropstats(pstatOK, pstatNotFound), nil
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}
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// Propnames returns the property names defined for resource name.
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func propnames(c *gin.Context, file fs.File, fm manager.FileManager) ([]xml.Name, error) {
|
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var deadProps map[xml.Name]Property
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dph := &metadataDeadProps{
|
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f: file,
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fm: fm,
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}
|
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deadProps, err := dph.DeadProps()
|
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if err != nil {
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return nil, err
|
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}
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isDir := file.Type() == types.FileTypeFolder
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pnames := make([]xml.Name, 0, len(liveProps)+len(deadProps))
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for pn, prop := range liveProps {
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if prop.findFn != nil && (prop.dir || !isDir) {
|
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pnames = append(pnames, pn)
|
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}
|
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}
|
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for pn := range deadProps {
|
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pnames = append(pnames, pn)
|
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}
|
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return pnames, nil
|
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}
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|
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// Allprop returns the properties defined for resource name and the properties
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// named in include.
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//
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// Note that RFC 4918 defines 'allprop' to return the DAV: properties defined
|
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// within the RFC plus dead properties. Other live properties should only be
|
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// returned if they are named in 'include'.
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//
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// See http://www.webdav.org/specs/rfc4918.html#METHOD_PROPFIND
|
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func allprop(c *gin.Context, file fs.File, fm manager.FileManager, include []xml.Name) ([]Propstat, error) {
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pnames, err := propnames(c, file, fm)
|
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if err != nil {
|
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return nil, err
|
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}
|
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// Add names from include if they are not already covered in pnames.
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nameset := make(map[xml.Name]bool)
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for _, pn := range pnames {
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nameset[pn] = true
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}
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for _, pn := range include {
|
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if !nameset[pn] {
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pnames = append(pnames, pn)
|
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}
|
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}
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return props(c, file, fm, pnames)
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}
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|
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// Patch patches the properties of resource name. The return values are
|
||||
// constrained in the same manner as DeadPropsHolder.Patch.
|
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func patch(c context.Context, file fs.File, fm manager.FileManager, patches []Proppatch) ([]Propstat, error) {
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conflict := false
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loop:
|
||||
for _, patch := range patches {
|
||||
for _, p := range patch.Props {
|
||||
if _, ok := liveProps[p.XMLName]; ok {
|
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conflict = true
|
||||
break loop
|
||||
}
|
||||
}
|
||||
}
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||||
if conflict {
|
||||
pstatForbidden := Propstat{
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||||
Status: http.StatusForbidden,
|
||||
XMLError: `<D:cannot-modify-protected-property xmlns:D="DAV:"/>`,
|
||||
}
|
||||
pstatFailedDep := Propstat{
|
||||
Status: StatusFailedDependency,
|
||||
}
|
||||
for _, patch := range patches {
|
||||
for _, p := range patch.Props {
|
||||
if _, ok := liveProps[p.XMLName]; ok {
|
||||
pstatForbidden.Props = append(pstatForbidden.Props, Property{XMLName: p.XMLName})
|
||||
} else {
|
||||
pstatFailedDep.Props = append(pstatFailedDep.Props, Property{XMLName: p.XMLName})
|
||||
}
|
||||
}
|
||||
}
|
||||
return makePropstats(pstatForbidden, pstatFailedDep), nil
|
||||
}
|
||||
|
||||
// very unlikely to be false
|
||||
dph := &metadataDeadProps{
|
||||
f: file,
|
||||
fm: fm,
|
||||
}
|
||||
|
||||
ret, err := dph.Patch(c, patches)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
// http://www.webdav.org/specs/rfc4918.html#ELEMENT_propstat says that
|
||||
// "The contents of the prop XML element must only list the names of
|
||||
// properties to which the result in the status element applies."
|
||||
for _, pstat := range ret {
|
||||
for i, p := range pstat.Props {
|
||||
pstat.Props[i] = Property{XMLName: p.XMLName}
|
||||
}
|
||||
}
|
||||
return ret, nil
|
||||
}
|
||||
|
||||
func escapeXML(s string) string {
|
||||
for i := 0; i < len(s); i++ {
|
||||
// As an optimization, if s contains only ASCII letters, digits or a
|
||||
// few special characters, the escaped value is s itself and we don't
|
||||
// need to allocate a buffer and convert between string and []byte.
|
||||
switch c := s[i]; {
|
||||
case c == ' ' || c == '_' ||
|
||||
('+' <= c && c <= '9') || // Digits as well as + , - . and /
|
||||
('A' <= c && c <= 'Z') ||
|
||||
('a' <= c && c <= 'z'):
|
||||
continue
|
||||
}
|
||||
// Otherwise, go through the full escaping process.
|
||||
var buf bytes.Buffer
|
||||
xml.EscapeText(&buf, []byte(s))
|
||||
return buf.String()
|
||||
}
|
||||
return s
|
||||
}
|
||||
|
||||
// ErrNotImplemented should be returned by optional interfaces if they
|
||||
// want the original implementation to be used.
|
||||
var ErrNotImplemented = errors.New("not implemented")
|
||||
|
||||
func findResourceType(ctx context.Context, fm manager.FileManager, file fs.File) (string, error) {
|
||||
if file.Type() == types.FileTypeFolder {
|
||||
return `<D:collection xmlns:D="DAV:"/>`, nil
|
||||
}
|
||||
return "", nil
|
||||
}
|
||||
|
||||
func findDisplayName(ctx context.Context, fm manager.FileManager, file fs.File) (string, error) {
|
||||
return escapeXML(file.DisplayName()), nil
|
||||
}
|
||||
|
||||
func findContentLength(ctx context.Context, fm manager.FileManager, file fs.File) (string, error) {
|
||||
return strconv.FormatInt(file.Size(), 10), nil
|
||||
}
|
||||
|
||||
func findLastModified(ctx context.Context, fm manager.FileManager, file fs.File) (string, error) {
|
||||
return file.UpdatedAt().UTC().Format(http.TimeFormat), nil
|
||||
}
|
||||
|
||||
func findCreationDate(ctx context.Context, fm manager.FileManager, file fs.File) (string, error) {
|
||||
return file.CreatedAt().UTC().Format(http.TimeFormat), nil
|
||||
}
|
||||
|
||||
func findContentType(ctx context.Context, fm manager.FileManager, file fs.File) (string, error) {
|
||||
d := dependency.FromContext(ctx)
|
||||
return d.MimeDetector(ctx).TypeByName(file.DisplayName()), nil
|
||||
}
|
||||
|
||||
func findETag(ctx context.Context, fm manager.FileManager, file fs.File) (string, error) {
|
||||
hasher := dependency.FromContext(ctx).HashIDEncoder()
|
||||
return fmt.Sprintf(`"%s"`, hashid.EncodeEntityID(hasher, file.PrimaryEntityID())), nil
|
||||
}
|
||||
|
||||
func findQuotaUsedBytes(ctx context.Context, fm manager.FileManager, file fs.File) (string, error) {
|
||||
requester := inventory.UserFromContext(ctx)
|
||||
if file.Owner().ID != requester.ID {
|
||||
return "", ErrNotImplemented
|
||||
}
|
||||
capacity, err := fm.Capacity(ctx)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
return strconv.FormatInt(capacity.Used, 10), nil
|
||||
}
|
||||
|
||||
func findQuotaAvailableBytes(ctx context.Context, fm manager.FileManager, file fs.File) (string, error) {
|
||||
requester := inventory.UserFromContext(ctx)
|
||||
if file.Owner().ID != requester.ID {
|
||||
return "", ErrNotImplemented
|
||||
}
|
||||
capacity, err := fm.Capacity(ctx)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
return strconv.FormatInt(capacity.Total-capacity.Used, 10), nil
|
||||
}
|
||||
|
||||
func findSupportedLock(ctx context.Context, fm manager.FileManager, file fs.File) (string, error) {
|
||||
return `` +
|
||||
`<D:lockentry xmlns:D="DAV:">` +
|
||||
`<D:lockscope><D:exclusive/></D:lockscope>` +
|
||||
`<D:locktype><D:write/></D:locktype>` +
|
||||
`</D:lockentry>`, nil
|
||||
}
|
||||
Reference in New Issue
Block a user