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135 lines
3.4 KiB
135 lines
3.4 KiB
package rest
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import (
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"encoding/xml"
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"fmt"
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"net/http"
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"path"
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"strconv"
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"tank/rest/dav"
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)
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//访问前缀，这个是特殊入口
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var WEBDAV_PREFFIX = "/api/dav"
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//动态的文件属性
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type LiveProp struct {
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findFn func(user *User, matter *Matter) string
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dir bool
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}
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// SlashClean is equivalent to but slightly more efficient than
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// path.Clean("/" + name).
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func SlashClean(name string) string {
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if name == "" || name[0] != '/' {
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name = "/" + name
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}
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return path.Clean(name)
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}
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//所有的动态属性定义及其值的获取方式
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var LivePropMap = map[xml.Name]LiveProp{
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{Space: "DAV:", Local: "resourcetype"}: {
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findFn: func(user *User, matter *Matter) string {
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if matter.Dir {
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return `<D:collection xmlns:D="DAV:"/>`
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} else {
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return ""
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}
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},
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dir: true,
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},
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{Space: "DAV:", Local: "displayname"}: {
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findFn: func(user *User, matter *Matter) string {
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if SlashClean(matter.Name) == "/" {
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return ""
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} else {
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return dav.EscapeXML(matter.Name)
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}
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},
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dir: true,
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},
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{Space: "DAV:", Local: "getcontentlength"}: {
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findFn: func(user *User, matter *Matter) string {
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return strconv.FormatInt(matter.Size, 10)
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},
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dir: false,
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},
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{Space: "DAV:", Local: "getlastmodified"}: {
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findFn: func(user *User, matter *Matter) string {
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return matter.UpdateTime.UTC().Format(http.TimeFormat)
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},
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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: nil,
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dir: false,
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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: func(user *User, matter *Matter) string {
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if matter.Dir {
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return ""
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} else {
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return dav.EscapeXML(matter.Name)
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}
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},
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dir: false,
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},
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{Space: "DAV:", Local: "getetag"}: {
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findFn: func(user *User, matter *Matter) string {
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return fmt.Sprintf(`"%x%x"`, matter.UpdateTime.UnixNano(), matter.Size)
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},
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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: func(user *User, matter *Matter) string {
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return `` +
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`<D:lockentry xmlns:D="DAV:">` +
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`<D:lockscope><D:exclusive/></D:lockscope>` +
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`<D:locktype><D:write/></D:locktype>` +
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`</D:lockentry>`
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},
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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: func(user *User, matter *Matter) string {
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var size int64 = 0
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if user.SizeLimit >= 0 {
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size = user.SizeLimit
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} else {
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//没有限制，默认100G
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size = 100 * 1024 * 1024 * 1024
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}
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return fmt.Sprintf(`%d`, size)
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},
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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: func(user *User, matter *Matter) string {
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//已使用大小，默认0
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return fmt.Sprintf(`%d`, 0)
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},
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dir: true,
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},
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}
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