mirror of
https://github.com/1f349/go-webdav.git
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6887b6b812
Currently, the user principal path and the home set path are both hardcoded to "/", for both CalDAV and CardDAV. This poses a challenge if one wishes to run a CardDAV and CalDAV server in the same server. This commit introduces the concept of a UserPrincipalBackend. This backend must provide the path of the current user's principal URL from the given request context. The CalDAV and CardDAV backends are extended to also function as UserPrincipalBackend. In addition, they are required to supply the path of the respective home set (`calendar-home-set` and `addressbook-home-set`). The CardDAV and CalDAV servers act accordingly. The individual servers will continue to work as before (including the option of keeping everything at "/"). If one wishes to run CardDAV and CalDAV in parallel, the new `webdav.ServeUserPrincipal()` can be used as a convenience function to serve a common user principal URL for both servers. The input for this function can be easily computed by the application by getting the home set paths from the backends and using `caldav.NewCalendarHomeSet()` and `carddav.NewAddressbookHomeSet()` to create the home sets. Note that the storage backend will have to know about these paths as well. For any non-trivial use case, a storage backend should probably have access to the same UserPrincipalBackend. That is, however, an implementation detail and doesn't have to be reflected in the interfaces.
231 lines
7.2 KiB
Go
231 lines
7.2 KiB
Go
package caldav
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import (
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"encoding/xml"
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"fmt"
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"time"
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"github.com/emersion/go-webdav/internal"
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)
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const namespace = "urn:ietf:params:xml:ns:caldav"
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var (
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calendarHomeSetName = xml.Name{namespace, "calendar-home-set"}
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calendarDescriptionName = xml.Name{namespace, "calendar-description"}
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supportedCalendarDataName = xml.Name{namespace, "supported-calendar-data"}
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supportedCalendarComponentSetName = xml.Name{namespace, "supported-calendar-component-set"}
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maxResourceSizeName = xml.Name{namespace, "max-resource-size"}
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calendarQueryName = xml.Name{namespace, "calendar-query"}
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calendarMultigetName = xml.Name{namespace, "calendar-multiget"}
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calendarName = xml.Name{namespace, "calendar"}
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calendarDataName = xml.Name{namespace, "calendar-data"}
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)
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// https://tools.ietf.org/html/rfc4791#section-6.2.1
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type calendarHomeSet struct {
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XMLName xml.Name `xml:"urn:ietf:params:xml:ns:caldav calendar-home-set"`
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Href internal.Href `xml:"DAV: href"`
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}
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func (a *calendarHomeSet) GetXMLName() xml.Name {
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return calendarHomeSetName
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}
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// https://tools.ietf.org/html/rfc4791#section-5.2.1
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type calendarDescription struct {
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XMLName xml.Name `xml:"urn:ietf:params:xml:ns:caldav calendar-description"`
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Description string `xml:",chardata"`
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}
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// https://tools.ietf.org/html/rfc4791#section-5.2.4
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type supportedCalendarData struct {
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XMLName xml.Name `xml:"urn:ietf:params:xml:ns:caldav supported-calendar-data"`
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Types []calendarDataType `xml:"calendar-data"`
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}
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// https://tools.ietf.org/html/rfc4791#section-5.2.3
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type supportedCalendarComponentSet struct {
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XMLName xml.Name `xml:"urn:ietf:params:xml:ns:caldav supported-calendar-component-set"`
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Comp []comp `xml:"comp"`
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}
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// https://tools.ietf.org/html/rfc4791#section-9.6
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type calendarDataType struct {
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XMLName xml.Name `xml:"urn:ietf:params:xml:ns:caldav calendar-data"`
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ContentType string `xml:"content-type,attr"`
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Version string `xml:"version,attr"`
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}
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// https://tools.ietf.org/html/rfc4791#section-5.2.5
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type maxResourceSize struct {
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XMLName xml.Name `xml:"urn:ietf:params:xml:ns:caldav max-resource-size"`
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Size int64 `xml:",chardata"`
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}
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// https://tools.ietf.org/html/rfc4791#section-9.5
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type calendarQuery struct {
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XMLName xml.Name `xml:"urn:ietf:params:xml:ns:caldav calendar-query"`
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Prop *internal.Prop `xml:"DAV: prop,omitempty"`
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AllProp *struct{} `xml:"DAV: allprop,omitempty"`
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PropName *struct{} `xml:"DAV: propname,omitempty"`
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Filter filter `xml:"filter"`
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// TODO: timezone
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}
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// https://tools.ietf.org/html/rfc4791#section-9.10
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type calendarMultiget struct {
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XMLName xml.Name `xml:"urn:ietf:params:xml:ns:caldav calendar-multiget"`
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Hrefs []internal.Href `xml:"DAV: href"`
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Prop *internal.Prop `xml:"DAV: prop,omitempty"`
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AllProp *struct{} `xml:"DAV: allprop,omitempty"`
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PropName *struct{} `xml:"DAV: propname,omitempty"`
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}
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// https://tools.ietf.org/html/rfc4791#section-9.7
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type filter struct {
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XMLName xml.Name `xml:"urn:ietf:params:xml:ns:caldav filter"`
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CompFilter compFilter `xml:"comp-filter"`
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}
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// https://tools.ietf.org/html/rfc4791#section-9.7.1
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type compFilter struct {
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XMLName xml.Name `xml:"urn:ietf:params:xml:ns:caldav comp-filter"`
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Name string `xml:"name,attr"`
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IsNotDefined *struct{} `xml:"is-not-defined,omitempty"`
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TimeRange *timeRange `xml:"time-range,omitempty"`
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PropFilters []propFilter `xml:"prop-filter,omitempty"`
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CompFilters []compFilter `xml:"comp-filter,omitempty"`
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}
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// https://tools.ietf.org/html/rfc4791#section-9.7.2
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type propFilter struct {
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XMLName xml.Name `xml:"urn:ietf:params:xml:ns:caldav prop-filter"`
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Name string `xml:"name,attr"`
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IsNotDefined *struct{} `xml:"is-not-defined,omitempty"`
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TimeRange *timeRange `xml:"time-range,omitempty"`
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TextMatch *textMatch `xml:"text-match,omitempty"`
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ParamFilter []paramFilter `xml:"param-filter,omitempty"`
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}
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// https://tools.ietf.org/html/rfc4791#section-9.7.3
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type paramFilter struct {
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XMLName xml.Name `xml:"urn:ietf:params:xml:ns:caldav param-filter"`
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Name string `xml:"name,attr"`
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IsNotDefined *struct{} `xml:"is-not-defined,omitempty"`
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TextMatch *textMatch `xml:"text-match,omitempty"`
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}
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// https://tools.ietf.org/html/rfc4791#section-9.7.5
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type textMatch struct {
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XMLName xml.Name `xml:"urn:ietf:params:xml:ns:caldav text-match"`
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Text string `xml:",chardata"`
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Collation string `xml:"collation,attr,omitempty"`
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NegateCondition negateCondition `xml:"negate-condition,attr,omitempty"`
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}
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type negateCondition bool
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func (nc *negateCondition) UnmarshalText(b []byte) error {
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switch s := string(b); s {
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case "yes":
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*nc = true
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case "no":
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*nc = false
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default:
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return fmt.Errorf("caldav: invalid negate-condition value: %q", s)
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}
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return nil
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}
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func (nc negateCondition) MarshalText() ([]byte, error) {
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if nc {
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return []byte("yes"), nil
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}
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return nil, nil
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}
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// https://tools.ietf.org/html/rfc4791#section-9.9
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type timeRange struct {
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XMLName xml.Name `xml:"urn:ietf:params:xml:ns:caldav time-range"`
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Start dateWithUTCTime `xml:"start,attr,omitempty"`
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End dateWithUTCTime `xml:"end,attr,omitempty"`
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}
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const dateWithUTCTimeLayout = "20060102T150405Z"
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// dateWithUTCTime is the "date with UTC time" format defined in RFC 5545 page
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// 34.
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type dateWithUTCTime time.Time
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func (t *dateWithUTCTime) UnmarshalText(b []byte) error {
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tt, err := time.Parse(dateWithUTCTimeLayout, string(b))
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if err != nil {
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return err
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}
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*t = dateWithUTCTime(tt)
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return nil
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}
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func (t *dateWithUTCTime) MarshalText() ([]byte, error) {
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s := time.Time(*t).Format(dateWithUTCTimeLayout)
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return []byte(s), nil
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}
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// Request variant of https://tools.ietf.org/html/rfc4791#section-9.6
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type calendarDataReq struct {
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XMLName xml.Name `xml:"urn:ietf:params:xml:ns:caldav calendar-data"`
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Comp *comp `xml:"comp,omitempty"`
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// TODO: expand, limit-recurrence-set, limit-freebusy-set
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}
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// https://tools.ietf.org/html/rfc4791#section-9.6.1
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type comp struct {
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XMLName xml.Name `xml:"urn:ietf:params:xml:ns:caldav comp"`
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Name string `xml:"name,attr"`
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Allprop *struct{} `xml:"allprop,omitempty"`
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Prop []prop `xml:"prop,omitempty"`
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Allcomp *struct{} `xml:"allcomp,omitempty"`
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Comp []comp `xml:"comp,omitempty"`
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}
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// https://tools.ietf.org/html/rfc4791#section-9.6.4
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type prop struct {
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XMLName xml.Name `xml:"urn:ietf:params:xml:ns:caldav prop"`
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Name string `xml:"name,attr"`
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// TODO: novalue
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}
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// Response variant of https://tools.ietf.org/html/rfc4791#section-9.6
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type calendarDataResp struct {
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XMLName xml.Name `xml:"urn:ietf:params:xml:ns:caldav calendar-data"`
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Data []byte `xml:",chardata"`
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}
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type reportReq struct {
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Query *calendarQuery
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Multiget *calendarMultiget
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// TODO: CALDAV:free-busy-query
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}
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func (r *reportReq) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
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var v interface{}
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switch start.Name {
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case calendarQueryName:
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r.Query = &calendarQuery{}
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v = r.Query
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case calendarMultigetName:
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r.Multiget = &calendarMultiget{}
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v = r.Multiget
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default:
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return fmt.Errorf("caldav: unsupported REPORT root %q %q", start.Name.Space, start.Name.Local)
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}
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return d.DecodeElement(v, &start)
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}
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