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Add CalDAV support, refactor

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The filesystem storage backend now implements the required functions to
act as a basic CalDAV server. Some refactoring was done based on the
go-webdav development: introduce a UserPrincipalBackend, a new function
to serve the user principal URL, and more. See this PR for lots of
details: https://github.com/emersion/go-webdav/pull/62

Also adds a simple facility for debug output.
This commit is contained in:
Conrad Hoffmann 2022-03-23 10:38:14 +01:00
parent 5728f1ee27
commit 001917295d
7 changed files with 487 additions and 85 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

88
cmd/tokidoki/main.go
View File

@ -1,19 +1,83 @@
package main
import (
"context"
"encoding/base64"
"flag"
"fmt"
"log"
"net/http"
"os"
"github.com/emersion/go-webdav"
"github.com/emersion/go-webdav/caldav"
"github.com/emersion/go-webdav/carddav"
"github.com/go-chi/chi/v5"
"github.com/go-chi/chi/v5/middleware"
"git.sr.ht/~sircmpwn/tokidoki/auth"
"git.sr.ht/~sircmpwn/tokidoki/debug"
"git.sr.ht/~sircmpwn/tokidoki/storage"
)
type userPrincipalBackend struct{}
func (u *userPrincipalBackend) CurrentUserPrincipal(ctx context.Context) (string, error) {
authCtx, ok := auth.FromContext(ctx)
if !ok {
panic("Invalid data in auth context!")
}
if authCtx == nil {
return "", fmt.Errorf("unauthenticated requests are not supported")
}
userDir := base64.RawStdEncoding.EncodeToString([]byte(authCtx.UserName))
return "/" + userDir + "/", nil
}
type tokidokiHandler struct {
upBackend webdav.UserPrincipalBackend
authBackend auth.AuthProvider
caldavBackend caldav.Backend
carddavBackend carddav.Backend
}
func (u *tokidokiHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
userPrincipalPath, err := u.upBackend.CurrentUserPrincipal(r.Context())
if err != nil {
http.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
}
var homeSets []webdav.BackendSuppliedHomeSet
if u.caldavBackend != nil {
path, err := u.caldavBackend.CalendarHomeSetPath(r.Context())
if err != nil {
http.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
} else {
homeSets = append(homeSets, caldav.NewCalendarHomeSet(path))
}
}
if u.carddavBackend != nil {
path, err := u.carddavBackend.AddressbookHomeSetPath(r.Context())
if err != nil {
http.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
} else {
homeSets = append(homeSets, carddav.NewAddressBookHomeSet(path))
}
}
opts := webdav.ServeUserPrincipalOptions{
UserPrincipalPath: userPrincipalPath,
HomeSets: homeSets,
}
if webdav.ServeUserPrincipal(w, r, opts) {
return
}
http.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
}
func main() {
var (
addr string
@ -23,6 +87,7 @@ func main() {
flag.StringVar(&addr, "addr", ":8080", "listening address")
flag.StringVar(&authURL, "auth.url", "", "auth backend URL (required)")
flag.StringVar(&storageURL, "storage.url", "", "storage backend URL (required)")
flag.BoolVar(&debug.Enable, "debug", false, "enable debug output")
flag.Parse()
if len(flag.Args()) != 0 || authURL == "" || storageURL == "" {
@ -48,17 +113,36 @@ func main() {
}
mux.Use(authProvider.Middleware())
backend, err := storage.NewFromURL(storageURL)
upBackend := &userPrincipalBackend{}
caldavBackend, carddavBackend, err := storage.NewFromURL(storageURL, "/calendar/", "/contacts/", upBackend)
if err != nil {
log.Fatalf("failed to load storage backend: %s", err.Error())
}
mux.Mount("/", &carddav.Handler{Backend: backend})
carddavHandler := carddav.Handler{Backend: carddavBackend}
caldavHandler := caldav.Handler{Backend: caldavBackend}
handler := tokidokiHandler{
upBackend: upBackend,
authBackend: authProvider,
caldavBackend: caldavBackend,
carddavBackend: carddavBackend,
}
mux.Mount("/", &handler)
mux.Mount("/.well-known/caldav", &caldavHandler)
mux.Mount("/.well-known/carddav", &carddavHandler)
mux.Mount("/{user}/contacts", &carddavHandler)
mux.Mount("/{user}/calendar", &caldavHandler)
server := http.Server{
Addr: addr,
Handler: mux,
}
log.Printf("Server running on %s", addr)
debug.Printf("Debug output enabled")
err = server.ListenAndServe()
if err != http.ErrServerClosed {
log.Fatalf("ListenAndServe: %s", err.Error())

15
debug/debug.go Normal file
View File

@ -0,0 +1,15 @@
package debug
import (
"log"
)
var (
Enable = false
)
func Printf(format string, v ...any) {
if Enable {
log.Printf("[debug] "+format, v...)
}
}

5
go.mod
View File

@ -1,8 +1,9 @@
module git.sr.ht/~sircmpwn/tokidoki
go 1.17
go 1.18
require (
github.com/emersion/go-ical v0.0.0-20200224201310-cd514449c39e
github.com/emersion/go-imap v1.2.0
github.com/emersion/go-sasl v0.0.0-20211008083017-0b9dcfb154ac
github.com/emersion/go-vcard v0.0.0-20210521075357-3445b9171995
@ -11,3 +12,5 @@ require (
)
require golang.org/x/text v0.3.7 // indirect
replace github.com/emersion/go-webdav v0.3.2-0.20220310154811-85d2b222bbcd => github.com/bitfehler/go-webdav v0.3.2-0.20220503133151-e5312775c02f

3
go.sum
View File

@ -1,3 +1,6 @@
github.com/bitfehler/go-webdav v0.3.2-0.20220503133151-e5312775c02f h1:gRchuZEVTYh+ymMqejZKbD67ZLLm59Q9lTG49e0Qu20=
github.com/bitfehler/go-webdav v0.3.2-0.20220503133151-e5312775c02f/go.mod h1:uSM1VveeKtogBVWaYccTksToczooJ0rrVGNsgnDsr4Q=
github.com/emersion/go-ical v0.0.0-20200224201310-cd514449c39e h1:YGM1sI7edZOt8KAfX9Miq/X99d2QXdgjkJ7vN4HjxAA=
github.com/emersion/go-ical v0.0.0-20200224201310-cd514449c39e/go.mod h1:4xVTBPcT43a1pp3vdaa+FuRdX5XhKCZPpWv7m0z9ByM=
github.com/emersion/go-imap v1.2.0 h1:lyUQ3+EVM21/qbWE/4Ya5UG9r5+usDxlg4yfp3TgHFA=
github.com/emersion/go-imap v1.2.0/go.mod h1:Qlx1FSx2FTxjnjWpIlVNEuX+ylerZQNFE5NsmKFSejY=

432
storage/filesystem.go
View File

@ -5,74 +5,129 @@ import (
"crypto/sha1"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"io"
"io/fs"
"io/ioutil"
"os"
"path"
"path/filepath"
"regexp"
"github.com/emersion/go-ical"
"github.com/emersion/go-vcard"
"github.com/emersion/go-webdav"
"github.com/emersion/go-webdav/caldav"
"github.com/emersion/go-webdav/carddav"
"git.sr.ht/~sircmpwn/tokidoki/auth"
"git.sr.ht/~sircmpwn/tokidoki/debug"
)
type filesystemBackend struct {
path string
caldavPrefix string
carddavPrefix string
userPrincipalBackend webdav.UserPrincipalBackend
}
var (
nilBackend carddav.Backend = (*filesystemBackend)(nil)
validFilenameRegex = regexp.MustCompile(`^/[A-Za-z0-9][A-Za-z0-9_-]+(.[a-zA-Z]+)?$`)
validFilenameRegex = regexp.MustCompile(`^[A-Za-z0-9][A-Za-z0-9_-]+(.[a-zA-Z]+)?$`)
)
func NewFilesystem(path string) (carddav.Backend, error) {
info, err := os.Stat(path)
func NewFilesystem(fsPath, caldavPrefix, carddavPrefix string, userPrincipalBackend webdav.UserPrincipalBackend) (caldav.Backend, carddav.Backend, error) {
info, err := os.Stat(fsPath)
if err != nil {
return nilBackend, fmt.Errorf("failed to create filesystem backend: %s", err.Error())
return nil, nil, fmt.Errorf("failed to create filesystem backend: %s", err.Error())
}
if !info.IsDir() {
return nilBackend, fmt.Errorf("base path for filesystem backend must be a directory")
return nil, nil, fmt.Errorf("base path for filesystem backend must be a directory")
}
return &filesystemBackend{
path: path,
}, nil
backend := &filesystemBackend{
path: fsPath,
caldavPrefix: caldavPrefix,
carddavPrefix: carddavPrefix,
userPrincipalBackend: userPrincipalBackend,
}
return backend, backend, nil
}
func (b *filesystemBackend) pathForContext(ctx context.Context) (string, error) {
authCtx, ok := auth.FromContext(ctx)
if !ok {
panic("Invalid data in auth context!")
}
if authCtx == nil {
return "", fmt.Errorf("unauthenticated requests are not supported")
func (b *filesystemBackend) CurrentUserPrincipal(ctx context.Context) (string, error) {
return b.userPrincipalBackend.CurrentUserPrincipal(ctx)
}
userDir := base64.RawStdEncoding.EncodeToString([]byte(authCtx.UserName))
path := filepath.Join(b.path, userDir)
_, err := os.Stat(path)
if os.IsNotExist(err) {
err = os.Mkdir(path, 0755)
if err != nil {
return "", fmt.Errorf("error creating '%s': %s", path, err.Error())
}
}
return path, nil
}
func (b *filesystemBackend) safePath(ctx context.Context, path string) (string, error) {
basePath, err := b.pathForContext(ctx)
func (b *filesystemBackend) AddressbookHomeSetPath(ctx context.Context) (string, error) {
upPath, err := b.userPrincipalBackend.CurrentUserPrincipal(ctx)
if err != nil {
return "", err
}
return path.Join(upPath, b.carddavPrefix) + "/", nil
}
func (b *filesystemBackend) CalendarHomeSetPath(ctx context.Context) (string, error) {
upPath, err := b.userPrincipalBackend.CurrentUserPrincipal(ctx)
if err != nil {
return "", err
}
return path.Join(upPath, b.caldavPrefix) + "/", nil
}
func ensureLocalDir(path string) error {
if _, err := os.Stat(path); os.IsNotExist(err) {
err = os.MkdirAll(path, 0755)
if err != nil {
return fmt.Errorf("error creating '%s': %s", path, err.Error())
}
}
return nil
}
// don't use this directly, use localCalDAVPath or localCardDAVPath instead.
func (b *filesystemBackend) safeLocalPath(homeSetPath string, urlPath string) (string, error) {
localPath := filepath.Join(b.path, homeSetPath)
if err := ensureLocalDir(localPath); err != nil {
return "", err
}
if urlPath == "" {
return localPath, nil
}
// We are mapping to local filesystem path, so be conservative about what to accept
// TODO this changes once multiple addess books are supported
if !validFilenameRegex.MatchString(path) {
return "", fmt.Errorf("invalid request path")
dir, file := path.Split(urlPath)
// only accept resources in prefix, no subdirs for now
if dir != homeSetPath {
return "", fmt.Errorf("invalid request path %s", urlPath)
}
return filepath.Join(basePath, path), nil
// only accept simple file names for now
if !validFilenameRegex.MatchString(file) {
fmt.Printf("%s does not match regex!\n", file)
return "", fmt.Errorf("invalid file name")
}
// dir (= homeSetPath) is already included in path, so only file here
return filepath.Join(localPath, file), nil
}
func (b *filesystemBackend) localCalDAVPath(ctx context.Context, urlPath string) (string, error) {
homeSetPath, err := b.CalendarHomeSetPath(ctx)
if err != nil {
return "", err
}
return b.safeLocalPath(homeSetPath, urlPath)
}
func (b *filesystemBackend) localCardDAVPath(ctx context.Context, urlPath string) (string, error) {
homeSetPath, err := b.AddressbookHomeSetPath(ctx)
if err != nil {
return "", err
}
return b.safeLocalPath(homeSetPath, urlPath)
}
func etagForFile(path string) (string, error) {
@ -128,10 +183,27 @@ func vcardFromFile(path string, propFilter []string) (vcard.Card, error) {
return vcardPropFilter(card, propFilter), nil
}
func createDefaultAddressBook(path string) error {
func calendarFromFile(path string, propFilter []string) (*ical.Calendar, error) {
f, err := os.Open(path)
if err != nil {
return nil, err
}
defer f.Close()
dec := ical.NewDecoder(f)
cal, err := dec.Decode()
if err != nil {
return nil, err
}
return cal, nil
// return vcardPropFilter(card, propFilter), nil
}
func createDefaultAddressBook(path, localPath string) error {
// TODO what should the default address book look like?
defaultAB := carddav.AddressBook{
Path: "/default",
Path: path,
Name: "My contacts",
Description: "Default address book",
MaxResourceSize: 1024,
@ -141,7 +213,7 @@ func createDefaultAddressBook(path string) error {
if err != nil {
return fmt.Errorf("error creating default address book: %s", err.Error())
}
err = os.WriteFile(path, blob, 0644)
err = os.WriteFile(localPath, blob, 0644)
if err != nil {
return fmt.Errorf("error writing default address book: %s", err.Error())
}
@ -149,15 +221,23 @@ func createDefaultAddressBook(path string) error {
}
func (b *filesystemBackend) AddressBook(ctx context.Context) (*carddav.AddressBook, error) {
path, err := b.pathForContext(ctx)
debug.Printf("filesystem.AddressBook()")
path, err := b.localCardDAVPath(ctx, "")
if err != nil {
return nil, err
}
path = filepath.Join(path, "_default_ab.json")
path = filepath.Join(path, "addressbook.json")
debug.Printf("loading addressbook from %s", path)
data, err := ioutil.ReadFile(path)
if os.IsNotExist(err) {
err = createDefaultAddressBook(path)
urlPath, err := b.AddressbookHomeSetPath(ctx)
if err != nil {
return nil, err
}
debug.Printf("creating default addressbook (URL:path): %s:%s", urlPath, path)
err = createDefaultAddressBook(urlPath, path)
if err != nil {
return nil, err
}
@ -175,8 +255,9 @@ func (b *filesystemBackend) AddressBook(ctx context.Context) (*carddav.AddressBo
return &addressBook, nil
}
func (b *filesystemBackend) GetAddressObject(ctx context.Context, path string, req *carddav.AddressDataRequest) (*carddav.AddressObject, error) {
localPath, err := b.safePath(ctx, path)
func (b *filesystemBackend) GetAddressObject(ctx context.Context, objPath string, req *carddav.AddressDataRequest) (*carddav.AddressObject, error) {
debug.Printf("filesystem.GetAddressObject(%s, %v)", objPath, req)
localPath, err := b.localCardDAVPath(ctx, objPath)
if err != nil {
return nil, err
}
@ -202,7 +283,7 @@ func (b *filesystemBackend) GetAddressObject(ctx context.Context, path string, r
}
obj := carddav.AddressObject{
Path: path,
Path: objPath,
ModTime: info.ModTime(),
ETag: etag,
Card: card,
@ -210,17 +291,21 @@ func (b *filesystemBackend) GetAddressObject(ctx context.Context, path string, r
return &obj, nil
}
func (b *filesystemBackend) loadAll(ctx context.Context, propFilter []string) ([]carddav.AddressObject, error) {
func (b *filesystemBackend) loadAllContacts(ctx context.Context, propFilter []string) ([]carddav.AddressObject, error) {
var result []carddav.AddressObject
path, err := b.pathForContext(ctx)
localPath, err := b.localCardDAVPath(ctx, "")
if err != nil {
return result, err
}
err = filepath.Walk(path, func(filename string, info os.FileInfo, err error) error {
// Skip address book meta data files
if !info.Mode().IsRegular() || filepath.Ext(filename) == ".json" {
homeSetPath, err := b.AddressbookHomeSetPath(ctx)
if err != nil {
return result, err
}
err = filepath.Walk(localPath, func(filename string, info os.FileInfo, err error) error {
if !info.Mode().IsRegular() || filepath.Ext(filename) != ".vcf" {
return nil
}
@ -235,7 +320,7 @@ func (b *filesystemBackend) loadAll(ctx context.Context, propFilter []string) ([
}
obj := carddav.AddressObject{
Path: "/" + filepath.Base(filename),
Path: path.Join(homeSetPath, filepath.Base(filename)),
ModTime: info.ModTime(),
ETag: etag,
Card: card,
@ -244,25 +329,72 @@ func (b *filesystemBackend) loadAll(ctx context.Context, propFilter []string) ([
return nil
})
debug.Printf("filesystem.loadAllContacts() returning %d results from %s", len(result), localPath)
return result, err
}
func (b *filesystemBackend) loadAllCalendars(ctx context.Context, propFilter []string) ([]caldav.CalendarObject, error) {
var result []caldav.CalendarObject
localPath, err := b.localCalDAVPath(ctx, "")
if err != nil {
return result, err
}
homeSetPath, err := b.CalendarHomeSetPath(ctx)
if err != nil {
return result, err
}
err = filepath.Walk(localPath, func(filename string, info os.FileInfo, err error) error {
// Skip address book meta data files
if !info.Mode().IsRegular() || filepath.Ext(filename) != ".ics" {
return nil
}
cal, err := calendarFromFile(filename, propFilter)
if err != nil {
fmt.Printf("load calendar error for %s: %v\n", filename, err)
return err
}
etag, err := etagForFile(filename)
if err != nil {
return err
}
obj := caldav.CalendarObject{
Path: path.Join(homeSetPath, filepath.Base(filename)),
ModTime: info.ModTime(),
ETag: etag,
Data: cal,
}
result = append(result, obj)
return nil
})
debug.Printf("filesystem.loadAllCalendars() returning %d results from %s", len(result), localPath)
return result, err
}
func (b *filesystemBackend) ListAddressObjects(ctx context.Context, req *carddav.AddressDataRequest) ([]carddav.AddressObject, error) {
debug.Printf("filesystem.ListAddressObjects(%v)", req)
var propFilter []string
if req != nil && !req.AllProp {
propFilter = req.Props
}
return b.loadAll(ctx, propFilter)
return b.loadAllContacts(ctx, propFilter)
}
func (b *filesystemBackend) QueryAddressObjects(ctx context.Context, query *carddav.AddressBookQuery) ([]carddav.AddressObject, error) {
debug.Printf("filesystem.QueryAddressObjects(%v)", query)
var propFilter []string
if query != nil && !query.DataRequest.AllProp {
propFilter = query.DataRequest.Props
}
result, err := b.loadAll(ctx, propFilter)
result, err := b.loadAllContacts(ctx, propFilter)
if err != nil {
return result, err
}
@ -270,31 +402,19 @@ func (b *filesystemBackend) QueryAddressObjects(ctx context.Context, query *card
return carddav.Filter(query, result)
}
func (b *filesystemBackend) hasUIDConflict(ctx context.Context, uid, path string) (bool, error) {
all, err := b.loadAll(ctx, nil)
if err != nil {
return false, err
}
for _, contact := range all {
if contact.Path != path && contact.Card.Value(vcard.FieldUID) == uid {
return true, nil
}
}
func (b *filesystemBackend) PutAddressObject(ctx context.Context, objPath string, card vcard.Card, opts *carddav.PutAddressObjectOptions) (loc string, err error) {
debug.Printf("filesystem.PutAddressObject(%v, %v, %v)", objPath, card, opts)
return false, nil
}
// Object always get saved as <UID>.vcf
dirname, _ := path.Split(objPath)
objPath = path.Join(dirname, card.Value(vcard.FieldUID)+".vcf")
func (b *filesystemBackend) PutAddressObject(ctx context.Context, path string, card vcard.Card) (loc string, err error) {
localPath, err := b.safePath(ctx, path)
localPath, err := b.localCardDAVPath(ctx, objPath)
if err != nil {
return "", err
}
conflict, err := b.hasUIDConflict(ctx, card.Value(vcard.FieldUID), path)
if err != nil {
return "", err
}
if conflict {
if _, err := os.Stat(localPath); !os.IsNotExist(err) {
return "", carddav.NewPreconditionError(carddav.PreconditionNoUIDConflict)
}
@ -310,11 +430,13 @@ func (b *filesystemBackend) PutAddressObject(ctx context.Context, path string, c
return "", err
}
return path, nil
return objPath, nil
}
func (b *filesystemBackend) DeleteAddressObject(ctx context.Context, path string) error {
localPath, err := b.safePath(ctx, path)
debug.Printf("filesystem.DeleteAddressObject(%s)", path)
localPath, err := b.localCardDAVPath(ctx, path)
if err != nil {
return err
}
@ -324,3 +446,167 @@ func (b *filesystemBackend) DeleteAddressObject(ctx context.Context, path string
}
return nil
}
func createDefaultCalendar(path, localPath string) error {
// TODO what should the default calendar look like?
defaultC := caldav.Calendar{
Path: path,
Name: "My calendar",
Description: "Default calendar",
MaxResourceSize: 4096,
}
blob, err := json.MarshalIndent(defaultC, "", " ")
if err != nil {
return fmt.Errorf("error creating default calendar: %s", err.Error())
}
err = os.WriteFile(localPath, blob, 0644)
if err != nil {
return fmt.Errorf("error writing default calendar: %s", err.Error())
}
return nil
}
func (b *filesystemBackend) Calendar(ctx context.Context) (*caldav.Calendar, error) {
debug.Printf("filesystem.Calendar()")
path, err := b.localCalDAVPath(ctx, "")
if err != nil {
return nil, err
}
path = filepath.Join(path, "calendar.json")
debug.Printf("loading calendar from %s", path)
data, err := ioutil.ReadFile(path)
if os.IsNotExist(err) {
homeSetPath, err := b.CalendarHomeSetPath(ctx)
if err != nil {
return nil, err
}
debug.Printf("creating default calendar (URL:path): %s:%s", homeSetPath, path)
err = createDefaultCalendar(homeSetPath, path)
if err != nil {
return nil, err
}
data, err = ioutil.ReadFile(path)
}
if err != nil {
return nil, fmt.Errorf("error opening calendar: %s", err.Error())
}
var calendar caldav.Calendar
err = json.Unmarshal(data, &calendar)
if err != nil {
return nil, fmt.Errorf("error reading calendar: %s", err.Error())
}
return &calendar, nil
}
func (b *filesystemBackend) GetCalendarObject(ctx context.Context, objPath string, req *caldav.CalendarCompRequest) (*caldav.CalendarObject, error) {
debug.Printf("filesystem.GetCalendarObject(%s, %v)", objPath, req)
localPath, err := b.localCalDAVPath(ctx, objPath)
if err != nil {
return nil, err
}
info, err := os.Stat(localPath)
if err != nil {
if errors.Is(err, fs.ErrNotExist) {
debug.Printf("not found: %s", localPath)
return nil, nil
}
return nil, err
}
var propFilter []string
if req != nil && !req.AllProps {
propFilter = req.Props
}
calendar, err := calendarFromFile(localPath, propFilter)
if err != nil {
debug.Printf("error reading calendar: %v", err)
return nil, err
}
etag, err := etagForFile(localPath)
if err != nil {
return nil, err
}
obj := caldav.CalendarObject{
Path: objPath,
ModTime: info.ModTime(),
ETag: etag,
Data: calendar,
}
return &obj, nil
return nil, fmt.Errorf("not implemented")
}
func (b *filesystemBackend) ListCalendarObjects(ctx context.Context, req *caldav.CalendarCompRequest) ([]caldav.CalendarObject, error) {
debug.Printf("filesystem.ListCalendarObjects(%v)", req)
var propFilter []string
if req != nil && !req.AllProps {
propFilter = req.Props
}
return b.loadAllCalendars(ctx, propFilter)
}
func (b *filesystemBackend) QueryCalendarObjects(ctx context.Context, query *caldav.CalendarQuery) ([]caldav.CalendarObject, error) {
debug.Printf("filesystem.QueryCalendarObjects(%v)", query)
var propFilter []string
if query != nil && !query.CompRequest.AllProps {
propFilter = query.CompRequest.Props
}
result, err := b.loadAllCalendars(ctx, propFilter)
if err != nil {
return result, err
}
return result, nil
// TODO implement:
//return caldav.Filter(query, result)
}
func (b *filesystemBackend) PutCalendarObject(ctx context.Context, objPath string, calendar *ical.Calendar, opts *caldav.PutCalendarObjectOptions) (loc string, err error) {
debug.Printf("filesystem.PutCalendarObject(%s, %v, %v)", objPath, calendar, opts)
_, uid, err := caldav.ValidateCalendarObject(calendar)
if err != nil {
return "", caldav.NewPreconditionError(caldav.PreconditionValidCalendarObjectResource)
}
// Object always get saved as <UID>.ics
dirname, _ := path.Split(objPath)
objPath = path.Join(dirname, uid+".ics")
localPath, err := b.localCalDAVPath(ctx, objPath)
if err != nil {
return "", err
}
if _, err := os.Stat(localPath); !os.IsNotExist(err) {
return "", caldav.NewPreconditionError(caldav.PreconditionNoUIDConflict)
}
f, err := os.Create(localPath)
if err != nil {
return "", err
}
defer f.Close()
enc := ical.NewEncoder(f)
err = enc.Encode(calendar)
if err != nil {
return "", err
}
return objPath, nil
return "", nil
}

15
storage/postgresql.go
View File

@ -4,6 +4,7 @@ import (
"context"
"github.com/emersion/go-vcard"
"github.com/emersion/go-webdav/caldav"
"github.com/emersion/go-webdav/carddav"
)
@ -11,8 +12,16 @@ type psqlBackend struct{}
var _ carddav.Backend = (*psqlBackend)(nil)
func NewPostgreSQL() carddav.Backend {
return &psqlBackend{}
func NewPostgreSQL() (caldav.Backend, carddav.Backend, error) {
return nil, &psqlBackend{}, nil
}
func (*psqlBackend) CurrentUserPrincipal(ctx context.Context) (string, error) {
panic("TODO")
}
func (*psqlBackend) AddressbookHomeSetPath(ctx context.Context) (string, error) {
panic("TODO")
}
func (*psqlBackend) AddressBook(ctx context.Context) (*carddav.AddressBook, error) {
@ -31,7 +40,7 @@ func (*psqlBackend) QueryAddressObjects(ctx context.Context, query *carddav.Addr
panic("TODO")
}
func (*psqlBackend) PutAddressObject(ctx context.Context, path string, card vcard.Card) (loc string, err error) {
func (*psqlBackend) PutAddressObject(ctx context.Context, path string, card vcard.Card, opts *carddav.PutAddressObjectOptions) (loc string, err error) {
panic("TODO")
}

12
storage/url.go
View File

@ -4,21 +4,23 @@ import (
"fmt"
"net/url"
"github.com/emersion/go-webdav"
"github.com/emersion/go-webdav/caldav"
"github.com/emersion/go-webdav/carddav"
)
func NewFromURL(storageURL string) (carddav.Backend, error) {
func NewFromURL(storageURL, caldavPrefix, carddavPrefix string, userPrincipalBackend webdav.UserPrincipalBackend) (caldav.Backend, carddav.Backend, error) {
u, err := url.Parse(storageURL)
if err != nil {
return nil, fmt.Errorf("error parsing storage URL: %s", err.Error())
return nil, nil, fmt.Errorf("error parsing storage URL: %s", err.Error())
}
switch u.Scheme {
case "file":
return NewFilesystem(u.Path)
return NewFilesystem(u.Path, caldavPrefix, carddavPrefix, userPrincipalBackend)
case "postgresql":
return NewPostgreSQL(), nil
return NewPostgreSQL()
default:
return nil, fmt.Errorf("no storage provider found for %s:// URL", u.Scheme)
return nil, nil, fmt.Errorf("no storage provider found for %s:// URL", u.Scheme)
}
}