mirror of
https://github.com/1f349/go-webdav.git
synced 2024-10-18 17:01:44 +01:00
347 lines
10 KiB
Go
347 lines
10 KiB
Go
package caldav
|
|
|
|
import (
|
|
"context"
|
|
"encoding/xml"
|
|
"fmt"
|
|
"net/http"
|
|
"time"
|
|
|
|
"github.com/emersion/go-ical"
|
|
|
|
"github.com/emersion/go-webdav/internal"
|
|
)
|
|
|
|
// TODO: add support for multiple calendars
|
|
|
|
// CalendarHomeSetXML returns the XML name and marshalable value for a
|
|
// principal's calendar home set. It's designed to be used with
|
|
// webdav.ServePrincipal.
|
|
func CalendarHomeSetXML(path string) (xml.Name, xml.Marshaler) {
|
|
homeSet := &calendarHomeSet{Href: internal.Href{Path: path}}
|
|
v, _ := internal.EncodeRawXMLElement(homeSet)
|
|
return calendarHomeSetName, v
|
|
}
|
|
|
|
// Backend is a CalDAV server backend.
|
|
type Backend interface {
|
|
CurrentUserPrincipal(ctx context.Context) (string, error)
|
|
Calendar(ctx context.Context) (*Calendar, error)
|
|
GetCalendarObject(ctx context.Context, path string, req *CalendarCompRequest) (*CalendarObject, error)
|
|
ListCalendarObjects(ctx context.Context, req *CalendarCompRequest) ([]CalendarObject, error)
|
|
QueryCalendarObjects(ctx context.Context, query *CalendarQuery) ([]CalendarObject, error)
|
|
}
|
|
|
|
// Handler handles CalDAV HTTP requests. It can be used to create a CalDAV
|
|
// server.
|
|
type Handler struct {
|
|
Backend Backend
|
|
}
|
|
|
|
// ServeHTTP implements http.Handler.
|
|
func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
|
|
if h.Backend == nil {
|
|
http.Error(w, "caldav: no backend available", http.StatusInternalServerError)
|
|
return
|
|
}
|
|
|
|
if r.URL.Path == "/.well-known/caldav" {
|
|
http.Redirect(w, r, "/", http.StatusMovedPermanently)
|
|
return
|
|
}
|
|
|
|
var err error
|
|
switch r.Method {
|
|
case "REPORT":
|
|
err = h.handleReport(w, r)
|
|
default:
|
|
b := backend{h.Backend}
|
|
hh := internal.Handler{&b}
|
|
hh.ServeHTTP(w, r)
|
|
}
|
|
|
|
if err != nil {
|
|
internal.ServeError(w, err)
|
|
}
|
|
}
|
|
|
|
func (h *Handler) handleReport(w http.ResponseWriter, r *http.Request) error {
|
|
var report reportReq
|
|
if err := internal.DecodeXMLRequest(r, &report); err != nil {
|
|
return err
|
|
}
|
|
|
|
if report.Query != nil {
|
|
return h.handleQuery(r, w, report.Query)
|
|
} else if report.Multiget != nil {
|
|
return h.handleMultiget(w, report.Multiget)
|
|
}
|
|
return internal.HTTPErrorf(http.StatusBadRequest, "caldav: expected calendar-query or calendar-multiget element in REPORT request")
|
|
}
|
|
|
|
func decodeParamFilter(el *paramFilter) (*ParamFilter, error) {
|
|
pf := &ParamFilter{Name: el.Name}
|
|
if el.IsNotDefined != nil {
|
|
if el.TextMatch != nil {
|
|
return nil, fmt.Errorf("caldav: failed to parse param-filter: if is-not-defined is provided, text-match can't be provided")
|
|
}
|
|
pf.IsNotDefined = true
|
|
}
|
|
if el.TextMatch != nil {
|
|
pf.TextMatch = &TextMatch{Text: el.TextMatch.Text}
|
|
}
|
|
return pf, nil
|
|
}
|
|
|
|
func decodePropFilter(el *propFilter) (*PropFilter, error) {
|
|
pf := &PropFilter{Name: el.Name}
|
|
if el.IsNotDefined != nil {
|
|
if el.TextMatch != nil || el.TimeRange != nil || len(el.ParamFilter) > 0 {
|
|
return nil, fmt.Errorf("caldav: failed to parse prop-filter: if is-not-defined is provided, text-match, time-range, or param-filter can't be provided")
|
|
}
|
|
pf.IsNotDefined = true
|
|
}
|
|
if el.TextMatch != nil {
|
|
pf.TextMatch = &TextMatch{Text: el.TextMatch.Text}
|
|
}
|
|
if el.TimeRange != nil {
|
|
pf.Start = time.Time(el.TimeRange.Start)
|
|
pf.End = time.Time(el.TimeRange.End)
|
|
}
|
|
for _, paramEl := range el.ParamFilter {
|
|
paramFi, err := decodeParamFilter(¶mEl)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
pf.ParamFilter = append(pf.ParamFilter, *paramFi)
|
|
}
|
|
return pf, nil
|
|
}
|
|
|
|
func decodeCompFilter(el *compFilter) (*CompFilter, error) {
|
|
cf := &CompFilter{Name: el.Name}
|
|
if el.IsNotDefined != nil {
|
|
if el.TimeRange != nil || len(el.PropFilters) > 0 || len(el.CompFilters) > 0 {
|
|
return nil, fmt.Errorf("caldav: failed to parse comp-filter: if is-not-defined is provided, time-range, prop-filter, or comp-filter can't be provided")
|
|
}
|
|
cf.IsNotDefined = true
|
|
}
|
|
if el.TimeRange != nil {
|
|
cf.Start = time.Time(el.TimeRange.Start)
|
|
cf.End = time.Time(el.TimeRange.End)
|
|
}
|
|
for _, pfEl := range el.PropFilters {
|
|
pf, err := decodePropFilter(&pfEl)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
cf.Props = append(cf.Props, *pf)
|
|
}
|
|
for _, childEl := range el.CompFilters {
|
|
child, err := decodeCompFilter(&childEl)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
cf.Comps = append(cf.Comps, *child)
|
|
}
|
|
return cf, nil
|
|
}
|
|
|
|
func (h *Handler) handleQuery(r *http.Request, w http.ResponseWriter, query *calendarQuery) error {
|
|
var q CalendarQuery
|
|
// TODO: calendar-data in query.Prop
|
|
cf, err := decodeCompFilter(&query.Filter.CompFilter)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
q.CompFilter = *cf
|
|
|
|
cos, err := h.Backend.QueryCalendarObjects(r.Context(), &q)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
var resps []internal.Response
|
|
for _, co := range cos {
|
|
b := backend{h.Backend}
|
|
propfind := internal.Propfind{
|
|
Prop: query.Prop,
|
|
AllProp: query.AllProp,
|
|
PropName: query.PropName,
|
|
}
|
|
resp, err := b.propfindCalendarObject(&propfind, &co)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
resps = append(resps, *resp)
|
|
}
|
|
|
|
ms := internal.NewMultistatus(resps...)
|
|
|
|
return internal.ServeMultistatus(w, ms)
|
|
}
|
|
|
|
func (h *Handler) handleMultiget(w http.ResponseWriter, multiget *calendarMultiget) error {
|
|
panic("TODO")
|
|
}
|
|
|
|
type backend struct {
|
|
Backend Backend
|
|
}
|
|
|
|
func (b *backend) Options(r *http.Request) (caps []string, allow []string, err error) {
|
|
caps = []string{"calendar-access"}
|
|
|
|
if r.URL.Path == "/" {
|
|
return caps, []string{http.MethodOptions, "PROPFIND", "REPORT"}, nil
|
|
}
|
|
|
|
var dataReq CalendarCompRequest
|
|
_, err = b.Backend.GetCalendarObject(r.Context(), r.URL.Path, &dataReq)
|
|
if httpErr, ok := err.(*internal.HTTPError); ok && httpErr.Code == http.StatusNotFound {
|
|
return caps, []string{http.MethodOptions, http.MethodPut}, nil
|
|
} else if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
return caps, []string{
|
|
http.MethodOptions,
|
|
http.MethodHead,
|
|
http.MethodGet,
|
|
http.MethodPut,
|
|
http.MethodDelete,
|
|
"PROPFIND",
|
|
}, nil
|
|
}
|
|
|
|
func (b *backend) HeadGet(w http.ResponseWriter, r *http.Request) error {
|
|
panic("TODO")
|
|
}
|
|
|
|
func (b *backend) Propfind(r *http.Request, propfind *internal.Propfind, depth internal.Depth) (*internal.Multistatus, error) {
|
|
var resps []internal.Response
|
|
if r.URL.Path == "/" {
|
|
cal, err := b.Backend.Calendar(r.Context())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
resp, err := b.propfindCalendar(r.Context(), propfind, cal)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
resps = append(resps, *resp)
|
|
|
|
if depth != internal.DepthZero {
|
|
// TODO
|
|
}
|
|
}
|
|
|
|
return internal.NewMultistatus(resps...), nil
|
|
}
|
|
|
|
func (b *backend) propfindCalendar(ctx context.Context, propfind *internal.Propfind, cal *Calendar) (*internal.Response, error) {
|
|
props := map[xml.Name]internal.PropfindFunc{
|
|
internal.ResourceTypeName: func(*internal.RawXMLValue) (interface{}, error) {
|
|
return internal.NewResourceType(internal.CollectionName, calendarName), nil
|
|
},
|
|
internal.DisplayNameName: func(*internal.RawXMLValue) (interface{}, error) {
|
|
return &internal.DisplayName{Name: cal.Name}, nil
|
|
},
|
|
supportedCalendarDataName: func(*internal.RawXMLValue) (interface{}, error) {
|
|
return &supportedCalendarData{
|
|
Types: []calendarDataType{
|
|
{ContentType: ical.MIMEType, Version: "2.0"},
|
|
},
|
|
}, nil
|
|
},
|
|
supportedCalendarComponentSetName: func(*internal.RawXMLValue) (interface{}, error) {
|
|
return &supportedCalendarComponentSet{
|
|
Comp: []comp{
|
|
{Name: ical.CompEvent},
|
|
},
|
|
}, nil
|
|
},
|
|
// TODO: this should be set on all resources
|
|
internal.CurrentUserPrincipalName: func(*internal.RawXMLValue) (interface{}, error) {
|
|
path, err := b.Backend.CurrentUserPrincipal(ctx)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &internal.CurrentUserPrincipal{Href: internal.Href{Path: path}}, nil
|
|
},
|
|
}
|
|
|
|
if cal.Description != "" {
|
|
props[calendarDescriptionName] = func(*internal.RawXMLValue) (interface{}, error) {
|
|
return &calendarDescription{Description: cal.Description}, nil
|
|
}
|
|
}
|
|
|
|
if cal.MaxResourceSize > 0 {
|
|
props[maxResourceSizeName] = func(*internal.RawXMLValue) (interface{}, error) {
|
|
return &maxResourceSize{Size: cal.MaxResourceSize}, nil
|
|
}
|
|
}
|
|
|
|
// TODO: CALDAV:calendar-timezone, CALDAV:supported-calendar-component-set, CALDAV:min-date-time, CALDAV:max-date-time, CALDAV:max-instances, CALDAV:max-attendees-per-instance
|
|
|
|
return internal.NewPropfindResponse(cal.Path, propfind, props)
|
|
}
|
|
|
|
func (b *backend) propfindCalendarObject(propfind *internal.Propfind, co *CalendarObject) (*internal.Response, error) {
|
|
panic("TODO")
|
|
}
|
|
|
|
func (b *backend) Proppatch(r *http.Request, update *internal.Propertyupdate) (*internal.Response, error) {
|
|
panic("TODO")
|
|
}
|
|
|
|
func (b *backend) Put(r *http.Request) (*internal.Href, error) {
|
|
panic("TODO")
|
|
}
|
|
|
|
func (b *backend) Delete(r *http.Request) error {
|
|
panic("TODO")
|
|
}
|
|
|
|
func (b *backend) Mkcol(r *http.Request) error {
|
|
panic("TODO")
|
|
}
|
|
|
|
func (b *backend) Copy(r *http.Request, dest *internal.Href, recursive, overwrite bool) (created bool, err error) {
|
|
panic("TODO")
|
|
}
|
|
|
|
func (b *backend) Move(r *http.Request, dest *internal.Href, overwrite bool) (created bool, err error) {
|
|
panic("TODO")
|
|
}
|
|
|
|
// https://datatracker.ietf.org/doc/html/rfc4791#section-5.3.2.1
|
|
type PreconditionType string
|
|
|
|
const (
|
|
PreconditionNoUIDConflict PreconditionType = "no-uid-conflict"
|
|
PreconditionSupportedCalendarData PreconditionType = "supported-calendar-data"
|
|
PreconditionSupportedCalendarComponent PreconditionType = "supported-calendar-component"
|
|
PreconditionValidCalendarData PreconditionType = "valid-calendar-data"
|
|
PreconditionValidCalendarObjectResource PreconditionType = "valid-calendar-object-resource"
|
|
PreconditionCalendarCollectionLocationOk PreconditionType = "calendar-collection-location-ok"
|
|
PreconditionMaxResourceSize PreconditionType = "max-resource-size"
|
|
PreconditionMinDateTime PreconditionType = "min-date-time"
|
|
PreconditionMaxDateTime PreconditionType = "max-date-time"
|
|
PreconditionMaxInstances PreconditionType = "max-instances"
|
|
PreconditionMaxAttendeesPerInstance PreconditionType = "max-attendees-per-instance"
|
|
)
|
|
|
|
func NewPreconditionError(err PreconditionType) error {
|
|
name := xml.Name{"urn:ietf:params:xml:ns:caldav", string(err)}
|
|
elem := internal.NewRawXMLElement(name, nil, nil)
|
|
return &internal.HTTPError{
|
|
Code: 409,
|
|
Err: &internal.Error{
|
|
Raw: []internal.RawXMLValue{*elem},
|
|
},
|
|
}
|
|
}
|