More depency upgrades

v1 is no longer actively maintained.

Co-authored-by: Conrad Hoffmann <ch@bitfehler.net>

auth/htpasswd.go

@@ -0,0 +1,91 @@
+package auth
+
+import (
+	"bufio"
+	"fmt"
+	"net/http"
+	"os"
+	"strings"
+
+	"golang.org/x/crypto/bcrypt"
+
+	"github.com/rs/zerolog/log"
+)
+
+// This provider provides htpasswd style authentication, but _only_ if the
+// bcrypt algorithm is used (hash must start with $2y). Use e.g.
+// `htpasswd -c -BC 17 <filename> <user>`
+
+type htpasswdProvider struct {
+	users map[string]string
+}
+
+func NewHtpasswd(location string) (AuthProvider, error) {
+	file, err := os.Open(location)
+	if err != nil {
+		return nil, fmt.Errorf("failed to open %s: %s", location, err.Error())
+	}
+	defer file.Close()
+
+	var result htpasswdProvider
+	result.users = make(map[string]string)
+
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		fields := strings.Split(scanner.Text(), ":")
+		if len(fields) != 2 {
+			return nil, fmt.Errorf("failed to parse %s: %s: expected 2 fields, found %d", location, scanner.Text(), len(fields))
+		}
+		if !strings.HasPrefix(fields[1], "$2y$") {
+			return nil, fmt.Errorf("failed to parse %s: %s is not a bcrypt hash ($2y)", location, scanner.Text())
+		}
+		result.users[fields[0]] = fields[1]
+	}
+
+	if err := scanner.Err(); err != nil {
+		return nil, fmt.Errorf("failed to parse %s: %s", location, err.Error())
+	}
+	return &result, nil
+}
+
+func (prov *htpasswdProvider) Middleware() func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			prov.htpasswdAuth(next, w, r)
+		})
+	}
+}
+
+func (prov *htpasswdProvider) htpasswdAuth(next http.Handler, w http.ResponseWriter, r *http.Request) {
+	user, pass, ok := r.BasicAuth()
+	if !ok {
+		w.Header().Add("WWW-Authenticate", `Basic realm="Please provide your system credentials", charset="UTF-8"`)
+		http.Error(w, "HTTP Basic auth is required", http.StatusUnauthorized)
+		return
+	}
+
+	hash, ok := prov.users[user]
+	if !ok {
+		log.Debug().Str("user", user).Msg("auth error")
+		http.Error(w, "Invalid username or password", http.StatusUnauthorized)
+		return
+	}
+
+	if err := bcrypt.CompareHashAndPassword([]byte(hash), []byte(pass)); err != nil {
+		if err != bcrypt.ErrMismatchedHashAndPassword {
+			log.Warn().Err(err).Str("user", user).Msg("password check failed")
+		} else {
+			log.Debug().Str("user", user).Msg("auth error")
+		}
+		http.Error(w, "Invalid username or password", http.StatusUnauthorized)
+		return
+	}
+
+	authCtx := AuthContext{
+		AuthMethod: "htpasswd",
+		UserName:   user,
+	}
+	ctx := NewContext(r.Context(), &authCtx)
+	r = r.WithContext(ctx)
+	next.ServeHTTP(w, r)
+}

auth/imap.go

@@ -5,8 +5,7 @@ import (
 
 	"github.com/rs/zerolog/log"
 
-	"github.com/emersion/go-imap/client"
+	"github.com/emersion/go-imap/v2/imapclient"
-	"github.com/emersion/go-sasl"
 )
 
 type IMAPProvider struct {
@@ -44,15 +43,14 @@ func (prov *IMAPProvider) doAuth(next http.Handler,
 
 	conn, err := prov.dial()
 	if err != nil {
-		log.Debug().Err(err).Msg("auth dial error")
+		log.Warn().Err(err).Msg("auth dial error")
 		http.Error(w, "Temporary authentication error, try again later", http.StatusServiceUnavailable)
 		return
 	}
 	defer conn.Close()
 
-	auth := sasl.NewPlainClient("", user, pass)
+	if err := conn.Login(user, pass).Wait(); err != nil {
-	if err := conn.Authenticate(auth); err != nil {
+		log.Debug().Str("user", user).Err(err).Msg("auth error")
-		log.Debug().Err(err).Msg("auth error")
 		http.Error(w, "Invalid username or password", http.StatusUnauthorized)
 		return
 	}
@@ -67,10 +65,10 @@ func (prov *IMAPProvider) doAuth(next http.Handler,
 	next.ServeHTTP(w, r)
 }
 
-func (prov *IMAPProvider) dial() (*client.Client, error) {
+func (prov *IMAPProvider) dial() (*imapclient.Client, error) {
 	if prov.tls {
-		return client.DialTLS(prov.addr, nil)
+		return imapclient.DialTLS(prov.addr, nil)
 	} else {
-		return client.Dial(prov.addr)
+		return imapclient.DialInsecure(prov.addr, nil)
 	}
 }

auth/oauth2.go

@@ -0,0 +1,87 @@
+package auth
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"strings"
+
+	"github.com/rs/zerolog/log"
+
+	"git.sr.ht/~emersion/go-oauth2"
+)
+
+type OAuth2Provider struct {
+	metadata     *oauth2.ServerMetadata
+	clientID     string
+	clientSecret string
+}
+
+// Initializes a new OAuth 2.0 auth provider with the given connection string.
+func NewOAuth2(endpoint, clientID, clientSecret string) (AuthProvider, error) {
+	metadata, err := oauth2.DiscoverServerMetadata(context.Background(), endpoint)
+	if err != nil {
+		return nil, fmt.Errorf("failed to fetch OAuth 2.0 server metadata: %v", err)
+	}
+	return &OAuth2Provider{
+		metadata:     metadata,
+		clientID:     clientID,
+		clientSecret: clientSecret,
+	}, nil
+}
+
+func (prov *OAuth2Provider) Middleware() func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			prov.doAuth(next, w, r)
+		})
+	}
+}
+
+func (prov *OAuth2Provider) doAuth(next http.Handler,
+	w http.ResponseWriter, r *http.Request) {
+
+	auth := r.Header.Get("Authorization")
+	authScheme, creds, _ := strings.Cut(auth, " ")
+	var username, accessToken string
+	switch strings.ToLower(authScheme) {
+	case "bearer":
+		accessToken = creds
+	case "basic":
+		username, accessToken, _ = r.BasicAuth()
+	default:
+		w.Header().Add("WWW-Authenticate", `Bearer, Basic realm="Please provide an OAuth access token", charset="UTF-8"`)
+		http.Error(w, "HTTP auth is required", http.StatusUnauthorized)
+		return
+	}
+
+	client := oauth2.Client{
+		Server:       prov.metadata,
+		ClientID:     prov.clientID,
+		ClientSecret: prov.clientSecret,
+	}
+	resp, err := client.Introspect(r.Context(), accessToken)
+	if err != nil || !resp.Active {
+		log.Debug().Err(err).Msg("auth error")
+		http.Error(w, "Invalid access token", http.StatusUnauthorized)
+		return
+	}
+
+	if username != "" && username != resp.Username {
+		http.Error(w, "Invalid username", http.StatusUnauthorized)
+		return
+	}
+
+	if resp.Username == "" {
+		http.Error(w, "OAuth 2.0 server did not send username", http.StatusInternalServerError)
+		return
+	}
+
+	authCtx := AuthContext{
+		AuthMethod: "oauth2",
+		UserName:   resp.Username,
+	}
+	ctx := NewContext(r.Context(), &authCtx)
+	r = r.WithContext(ctx)
+	next.ServeHTTP(w, r)
+}

auth/pam.go

@@ -6,7 +6,7 @@ import (
 	"fmt"
 	"net/http"
 
-	"github.com/msteinert/pam"
+	"github.com/msteinert/pam/v2"
 	"github.com/rs/zerolog/log"
 )
 
@@ -44,26 +44,32 @@ func pamAuth(next http.Handler, w http.ResponseWriter, r *http.Request) {
 		}
 	})
 	if err != nil {
-		log.Debug().Err(err).Msg("failed to start PAM conversation")
+		log.Warn().Err(err).Msg("failed to start PAM conversation")
 		http.Error(w, "Temporary authentication error, try again later", http.StatusServiceUnavailable)
 		return
 	}
+	defer func() {
+		err := t.End()
+		if err != nil {
+			log.Warn().Err(err).Msg("failed to end PAM transaction")
+		}
+	}()
 
 	if err := t.Authenticate(0); err != nil {
-		log.Debug().Err(err).Msg("auth error")
+		log.Debug().Str("user", user).Err(err).Msg("auth error")
 		http.Error(w, "Invalid username or password", http.StatusUnauthorized)
 		return
 	}
 
 	if err := t.AcctMgmt(0); err != nil {
-		log.Debug().Err(err).Msg("account unavailable")
+		log.Debug().Str("user", user).Err(err).Msg("account unavailable")
 		http.Error(w, "Account unavailable", http.StatusUnauthorized)
 		return
 	}
 
 	user, err = t.GetItem(pam.User)
 	if err != nil {
-		log.Debug().Err(err).Msg("failed to get PAM username")
+		log.Warn().Str("user", user).Err(err).Msg("failed to get PAM username")
 		http.Error(w, "Temporary authentication error, try again later", http.StatusServiceUnavailable)
 		return
 	}

auth/url.go

@@ -18,8 +18,22 @@ func NewFromURL(authURL string) (AuthProvider, error) {
 		return NewIMAP(u.Host, true), nil
 	case "pam":
 		return NewPAM()
+	case "file":
+		path := u.Path
+		if u.Host != "" {
+			path = u.Host + path
+		}
+		return NewHtpasswd(path)
 	case "null":
 		return NewNull()
+	case "http", "https":
+		if u.User == nil {
+			return nil, fmt.Errorf("missing client ID for OAuth 2.0")
+		}
+		clientID := u.User.Username()
+		clientSecret, _ := u.User.Password()
+		u.User = nil
+		return NewOAuth2(u.String(), clientID, clientSecret)
 	default:
 		return nil, fmt.Errorf("no auth provider found for %s:// URL", u.Scheme)
 	}

doc/tokidoki.8.scd

@@ -0,0 +1,118 @@
+tokidoki(8)
+
+# NAME
+
+tokidoki - a CalDAV/CardDAV server
+
+# SYNOPSIS
+
+*tokidoki* [OPTIONS]
+
+# DESCRIPTION
+
+*tokidoki* runs a multi-user CalDAV/CardDAV server.
+
+Currently, by default only a single address book and calendar per user are
+supported, as users cannot create new ones. If additional resources are created
+manually in the storage backend, *tokidoki* will however serve them just fine.
+
+*tokidoki* supports calendar and address book auto-discovery via
+*/.well-known/caldav* and */.well-known/carddav* respectively, as defined in RFC
+6764, section 6. Hence, most clients should be able to discover available
+resources by just pointing them at the server root.
+
+Regular logs are sent to stderr, HTTP logs are sent to stdout.
+
+# OPTIONS
+
+*-addr* _addr_
+	Bind to the specified address/port. Default: ":8080" (port 8080 on all
+	interfaces.
+
+*-auth.url* _url_
+	Auth backend URL (required). See AUTH BACKENDS below.
+
+*-cert* _filename_
+	Enable TLS and load certificate from _filename_. Requires *-key*.
+
+*-key* _filename_
+	Enable TLS and load key from _filename_. Requires *-cert*.
+
+*-log.debug*
+	Enable debug logs.
+
+*-log.json*
+	Enable structured logs.
+
+# AUTH BACKENDS
+
+Currently, all requests to tokidoki must be authenticated. To validate
+usernames and passwords, tokidoki supports a number of auth backends. The
+following authentication backends are available:
+
+## IMAP
+
+The IMAP auth backend defers authentication to the provided IMAP server.
+Convenient for large-scale deployments in conjunction with email services, or
+self-hosted email setups. Do not use this unless you control the specified IMAP
+server. Deferring authentication to e.g. Gmail would allow any Gmail user to
+authenticate.
+
+URL: *imaps://*_server_*:*_port_
+
+_Note:_ for development, *imap://* is also supported (plain IMAP without
+encryption). This is not recommended for production use.
+
+## PAM
+
+The PAM auth backed defers authentication to the local *PAM*(8) subsystem. This
+allows e.g. authentication as system user(s). Convenient for (mostly)
+single-user self-hosted setups.
+
+URL: *pam://* (no parameters)
+
+_Note:_ The PAM auth backend must be enabled at build time, as PAM may not be
+available on all platforms.
+
+## OAuth 2.0
+
+The OAuth 2.0 auth backend delegates authentication to the provided OAuth 2.0
+server.
+
+URL: *https://*_client_id_*:*_client_secret_*@*_host_
+
+## Static file (htpasswd)
+
+The static file auth backend relies on the file format popularized by Apache and
+other web servers for basic authentication. Such files are often created and edited
+using *htpasswd*(1). Convenient for small setups where virtual users (i.e. users
+that are not system users) are required or desired.
+
+URL: *file://*_path_ (both absolute and relative paths are supported)
+
+_Note:_ This backend has the significant limitation that it only supports
+bcrypt-hashed passwords (recognizable by the hash starting with *$2y$*). To
+create a file, use e.g. the following command:
+
+```
+htpasswd -c -B -C 17 <filename> <user>
+```
+
+# STORAGE BACKENDS
+
+To store users calendars and address books, tokidoki requires a storage backend.
+Currently, the following storage backends are available:
+
+## Filesystem
+
+The filesystem storage backend stores every event and every contact as
+individual file, in folders organized by user and resource, underneath the
+provided base path. The filesystem backend is relatively simple, with good
+performance.
+
+URL: *file://*_path_ (absolute path required)
+
+# SEE ALSO
+
+Links to the source code and mailing lists for discussion and development of
+*tokidoki* can be found at https://sr.ht/~sircmpwn/tokidoki.

go.mod

@@ -3,20 +3,22 @@ module git.sr.ht/~sircmpwn/tokidoki
 go 1.18
 
 require (
-	github.com/emersion/go-ical v0.0.0-20220601085725-0864dccc089f
+	git.sr.ht/~emersion/go-oauth2 v0.0.0-20240217160856-2e0d6e20b088
-	github.com/emersion/go-imap v1.2.1
+	github.com/emersion/go-ical v0.0.0-20240127095438-fc1c9d8fb2b6
-	github.com/emersion/go-sasl v0.0.0-20231106173351-e73c9f7bad43
+	github.com/emersion/go-imap/v2 v2.0.0-beta.2.0.20240417100641-a587a14d3f01
 	github.com/emersion/go-vcard v0.0.0-20230815062825-8fda7d206ec9
-	github.com/emersion/go-webdav v0.5.1-0.20240202164822-eaac65215b3a
+	github.com/emersion/go-webdav v0.5.1-0.20240419143909-21f251fa1de2
-	github.com/go-chi/chi/v5 v5.0.10
+	github.com/go-chi/chi/v5 v5.0.12
-	github.com/msteinert/pam v1.2.0
+	github.com/msteinert/pam/v2 v2.0.0
-	github.com/rs/zerolog v1.31.0
+	github.com/rs/zerolog v1.32.0
+	golang.org/x/crypto v0.18.0
 )
 
 require (
+	github.com/emersion/go-message v0.18.1 // indirect
+	github.com/emersion/go-sasl v0.0.0-20231106173351-e73c9f7bad43 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/teambition/rrule-go v1.8.2 // indirect
-	golang.org/x/sys v0.16.0 // indirect
+	golang.org/x/sys v0.19.0 // indirect
-	golang.org/x/text v0.14.0 // indirect
 )

go.sum

@@ -1,19 +1,20 @@
+git.sr.ht/~emersion/go-oauth2 v0.0.0-20240217160856-2e0d6e20b088 h1:KuPliLD8CQM1WbCHdjHR6mhadIzLaAJCNENmvB1y9gs=
+git.sr.ht/~emersion/go-oauth2 v0.0.0-20240217160856-2e0d6e20b088/go.mod h1:VHj0jSCLIkrfEwmOvJ4+ykpoVbD/YLN7BM523oKKBHc=
 github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
-github.com/emersion/go-ical v0.0.0-20220601085725-0864dccc089f h1:feGUUxxvOtWVOhTko8Cbmp33a+tU0IMZxMEmnkoAISQ=
+github.com/emersion/go-ical v0.0.0-20240127095438-fc1c9d8fb2b6 h1:kHoSgklT8weIDl6R6xFpBJ5IioRdBU1v2X2aCZRVCcM=
-github.com/emersion/go-ical v0.0.0-20220601085725-0864dccc089f/go.mod h1:2MKFUgfNMULRxqZkadG1Vh44we3y5gJAtTBlVsx1BKQ=
+github.com/emersion/go-ical v0.0.0-20240127095438-fc1c9d8fb2b6/go.mod h1:BEksegNspIkjCQfmzWgsgbu6KdeJ/4LwUZs7DMBzjzw=
-github.com/emersion/go-imap v1.2.1 h1:+s9ZjMEjOB8NzZMVTM3cCenz2JrQIGGo5j1df19WjTA=
+github.com/emersion/go-imap/v2 v2.0.0-beta.2.0.20240417100641-a587a14d3f01 h1:dq/06hDbCT+/DpbKWSrfrTeiJW97ION78N6J6Mktp2w=
-github.com/emersion/go-imap v1.2.1/go.mod h1:Qlx1FSx2FTxjnjWpIlVNEuX+ylerZQNFE5NsmKFSejY=
+github.com/emersion/go-imap/v2 v2.0.0-beta.2.0.20240417100641-a587a14d3f01/go.mod h1:BZTFHsS1hmgBkFlHqbxGLXk2hnRqTItUgwjSSCsYNAk=
-github.com/emersion/go-message v0.15.0/go.mod h1:wQUEfE+38+7EW8p8aZ96ptg6bAb1iwdgej19uXASlE4=
+github.com/emersion/go-message v0.18.1 h1:tfTxIoXFSFRwWaZsgnqS1DSZuGpYGzSmCZD8SK3QA2E=
-github.com/emersion/go-sasl v0.0.0-20200509203442-7bfe0ed36a21/go.mod h1:iL2twTeMvZnrg54ZoPDNfJaJaqy0xIQFuBdrLsmspwQ=
+github.com/emersion/go-message v0.18.1/go.mod h1:XpJyL70LwRvq2a8rVbHXikPgKj8+aI0kGdHlg16ibYA=
 github.com/emersion/go-sasl v0.0.0-20231106173351-e73c9f7bad43 h1:hH4PQfOndHDlpzYfLAAfl63E8Le6F2+EL/cdhlkyRJY=
 github.com/emersion/go-sasl v0.0.0-20231106173351-e73c9f7bad43/go.mod h1:iL2twTeMvZnrg54ZoPDNfJaJaqy0xIQFuBdrLsmspwQ=
-github.com/emersion/go-textwrapper v0.0.0-20200911093747-65d896831594/go.mod h1:aqO8z8wPrjkscevZJFVE1wXJrLpC5LtJG7fqLOsPb2U=
 github.com/emersion/go-vcard v0.0.0-20230815062825-8fda7d206ec9 h1:ATgqloALX6cHCranzkLb8/zjivwQ9DWWDCQRnxTPfaA=
 github.com/emersion/go-vcard v0.0.0-20230815062825-8fda7d206ec9/go.mod h1:HMJKR5wlh/ziNp+sHEDV2ltblO4JD2+IdDOWtGcQBTM=
-github.com/emersion/go-webdav v0.5.1-0.20240202164822-eaac65215b3a h1:IHOPSOw+XXKRSkuXTOeEtDejkuXqf0ohjZq9hew6ArA=
+github.com/emersion/go-webdav v0.5.1-0.20240419143909-21f251fa1de2 h1:k/NO/RfeXFuKGcpHDkspYoE8u6tWoHs03tH5DXg22To=
-github.com/emersion/go-webdav v0.5.1-0.20240202164822-eaac65215b3a/go.mod h1:ycyIzTelG5pHln4t+Y32/zBvmrM7+mV7x+V+Gx4ZQno=
+github.com/emersion/go-webdav v0.5.1-0.20240419143909-21f251fa1de2/go.mod h1:mI8iBx3RAODwX7PJJ7qzsKAKs/vY429YfS2/9wKnDbQ=
-github.com/go-chi/chi/v5 v5.0.10 h1:rLz5avzKpjqxrYwXNfmjkrYYXOyLJd37pz53UFHC6vk=
+github.com/go-chi/chi/v5 v5.0.12 h1:9euLV5sTrTNTRUU9POmDUvfxyj6LAABLUcEWO+JJb4s=
-github.com/go-chi/chi/v5 v5.0.10/go.mod h1:DslCQbL2OYiznFReuXYUmQ2hGd1aDpCnlMNITLSKoi8=
+github.com/go-chi/chi/v5 v5.0.12/go.mod h1:DslCQbL2OYiznFReuXYUmQ2hGd1aDpCnlMNITLSKoi8=
 github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
 github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
@@ -21,23 +22,50 @@ github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/
 github.com/mattn/go-isatty v0.0.19/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
-github.com/msteinert/pam v1.2.0 h1:mYfjlvN2KYs2Pb9G6nb/1f/nPfAttT/Jee5Sq9r3bGE=
+github.com/msteinert/pam/v2 v2.0.0 h1:jnObb8MT6jvMbmrUQO5J/puTUjxy7Av+55zVJRJsCyE=
-github.com/msteinert/pam v1.2.0/go.mod h1:d2n0DCUK8rGecChV3JzvmsDjOY4R7AYbsNxAT+ftQl0=
+github.com/msteinert/pam/v2 v2.0.0/go.mod h1:KT28NNIcDFf3PcBmNI2mIGO4zZJ+9RSs/At2PB3IDVc=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/rs/xid v1.5.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
-github.com/rs/zerolog v1.31.0 h1:FcTR3NnLWW+NnTwwhFWiJSZr4ECLpqCm6QsEnyvbV4A=
+github.com/rs/zerolog v1.32.0 h1:keLypqrlIjaFsbmJOBdB/qvyF8KEtCWHwobLp5l/mQ0=
-github.com/rs/zerolog v1.31.0/go.mod h1:/7mN4D5sKwJLZQ2b/znpjC3/GQWY/xaDXUM0kKWRHss=
+github.com/rs/zerolog v1.32.0/go.mod h1:/7mN4D5sKwJLZQ2b/znpjC3/GQWY/xaDXUM0kKWRHss=
-github.com/teambition/rrule-go v1.7.2/go.mod h1:mBJ1Ht5uboJ6jexKdNUJg2NcwP8uUMNvStWXlJD3MvU=
 github.com/teambition/rrule-go v1.8.2 h1:lIjpjvWTj9fFUZCmuoVDrKVOtdiyzbzc93qTmRVe/J8=
 github.com/teambition/rrule-go v1.8.2/go.mod h1:Ieq5AbrKGciP1V//Wq8ktsTXwSwJHDD5mD/wLBGl3p4=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/crypto v0.18.0 h1:PGVlW0xEltQnzFZ55hkuX5+KLyrMYhHld1YHO4AKcdc=
+golang.org/x/crypto v0.18.0/go.mod h1:R0j02AL6hcrfOiy9T4ZYp/rcWeMxM3L6QYxlOuEG1mg=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.16.0 h1:xWw16ngr6ZMtmxDyKyIgsE93KNKz5HKmMa3b8ALHidU=
+golang.org/x/sys v0.19.0 h1:q5f1RH2jigJ1MoAWp2KTp3gm5zAGFUTarQZ5U386+4o=
-golang.org/x/sys v0.16.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.19.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/term v0.6.0 h1:clScbb1cHjoCkyRbWwBEUZ5H/tIFu5TAXIqaZD0Gcjw=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
+golang.org/x/term v0.16.0 h1:m+B6fahuftsE9qjo0VWp2FW0mB3MTJvR0BaMQrq0pmE=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
+golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

storage/filesystem_caldav.go

@@ -189,19 +189,12 @@ func (b *filesystemBackend) ListCalendars(ctx context.Context) ([]caldav.Calenda
 	if err == nil && len(result) == 0 {
 		// Nothing here yet? Create the default calendar.
 		log.Debug().Msg("no calendars found, creating default calendar")
-		cal, err_ := b.createDefaultCalendar(ctx)
+		cal, err := b.createDefaultCalendar(ctx)
-		if err_ != nil {
+		if err == nil {
-			log.Debug().Int("results", len(result)).Bool("success", false).Str("error", err_.Error()).Msg("filesystem.ListCalendars() done")
+			result = append(result, *cal)
-			return nil, fmt.Errorf("error creating default calendar: %s", err_.Error())
 		}
-		result = append(result, *cal)
-	}
-
-	if err != nil {
-		log.Warn().Int("results", len(result)).Bool("success", false).Str("error", err.Error()).Msg("filesystem.ListCalendars() done")
-	} else {
-		log.Debug().Int("results", len(result)).Bool("success", true).Msg("filesystem.ListCalendars() done")
 	}
+	log.Debug().Int("results", len(result)).Err(err).Msg("filesystem.ListCalendars() done")
 	return result, err
 }
 
@@ -214,14 +207,14 @@ func (b *filesystemBackend) GetCalendar(ctx context.Context, urlPath string) (*c
 	}
 	localPath = filepath.Join(localPath, calendarFileName)
 
-	log.Debug().Str("local_path", localPath).Msg("loading calendar")
+	log.Debug().Str("path", localPath).Msg("loading calendar")
 
-	data, readErr := os.ReadFile(localPath)
+	data, err := os.ReadFile(localPath)
-	if readErr != nil {
+	if err != nil {
-		if os.IsNotExist(readErr) {
+		if os.IsNotExist(err) {
 			return nil, webdav.NewHTTPError(404, err)
 		}
-		return nil, fmt.Errorf("error opening calendar: %s", readErr.Error())
+		return nil, fmt.Errorf("error opening calendar: %s", err.Error())
 	}
 	var calendar caldav.Calendar
 	err = json.Unmarshal(data, &calendar)
@@ -232,8 +225,12 @@ func (b *filesystemBackend) GetCalendar(ctx context.Context, urlPath string) (*c
 	return &calendar, nil
 }
 
+func (b *filesystemBackend) CreateCalendar(ctx context.Context, calendar *caldav.Calendar) error {
+	panic("TODO")
+}
+
 func (b *filesystemBackend) GetCalendarObject(ctx context.Context, objPath string, req *caldav.CalendarCompRequest) (*caldav.CalendarObject, error) {
-	log.Debug().Str("url_path", objPath).Msg("filesystem.GetCalendarObject()")
+	log.Debug().Str("path", objPath).Msg("filesystem.GetCalendarObject()")
 
 	localPath, err := b.safeLocalCalDAVPath(ctx, objPath)
 	if err != nil {
@@ -243,7 +240,6 @@ func (b *filesystemBackend) GetCalendarObject(ctx context.Context, objPath strin
 	info, err := os.Stat(localPath)
 	if err != nil {
 		if errors.Is(err, fs.ErrNotExist) {
-			log.Debug().Str("local_path", localPath).Msg("object not found")
 			return nil, webdav.NewHTTPError(404, err)
 		}
 		return nil, err
@@ -256,7 +252,7 @@ func (b *filesystemBackend) GetCalendarObject(ctx context.Context, objPath strin
 
 	calendar, err := calendarFromFile(localPath, propFilter)
 	if err != nil {
-		log.Debug().Err(err).Msg("error reading calendar")
+		log.Debug().Str("path", localPath).Err(err).Msg("error reading calendar")
 		return nil, err
 	}
 
@@ -284,11 +280,7 @@ func (b *filesystemBackend) ListCalendarObjects(ctx context.Context, urlPath str
 	}
 
 	result, err := b.loadAllCalendarObjects(ctx, urlPath, propFilter)
-	if err != nil {
+	log.Debug().Int("results", len(result)).Err(err).Msg("filesystem.ListCalendarObjects() done")
-		log.Warn().Int("results", len(result)).Bool("success", false).Str("error", err.Error()).Msg("filesystem.ListCalendarObjects() done")
-	} else {
-		log.Debug().Int("results", len(result)).Bool("success", true).Msg("filesystem.ListCalendarObjects() done")
-	}
 	return result, err
 }
 
@@ -301,28 +293,22 @@ func (b *filesystemBackend) QueryCalendarObjects(ctx context.Context, urlPath st
 	}
 
 	result, err := b.loadAllCalendarObjects(ctx, urlPath, propFilter)
+	log.Debug().Int("results", len(result)).Err(err).Msg("filesystem.QueryCalendarObjects() load done")
 	if err != nil {
-		log.Warn().Int("results", len(result)).Str("error", err.Error()).Msg("filesystem.QueryCalendarObjects() error loading")
 		return result, err
 	}
 
-	log.Debug().Int("results", len(result)).Bool("success", true).Msg("filesystem.QueryCalendarObjects() load done")
-
 	filtered, err := caldav.Filter(query, result)
-	if err != nil {
+	log.Debug().Int("results", len(filtered)).Err(err).Msg("filesystem.QueryCalendarObjects() filter done")
-		log.Warn().Int("results", len(result)).Str("error", err.Error()).Msg("filesystem.QueryCalendarObjects() error filtering")
+	return filtered, err
-		return result, err
-	}
-	log.Debug().Int("results", len(filtered)).Bool("success", true).Msg("filesystem.QueryCalendarObjects() done")
-	return filtered, nil
 }
 
-func (b *filesystemBackend) PutCalendarObject(ctx context.Context, objPath string, calendar *ical.Calendar, opts *caldav.PutCalendarObjectOptions) (loc string, err error) {
+func (b *filesystemBackend) PutCalendarObject(ctx context.Context, objPath string, calendar *ical.Calendar, opts *caldav.PutCalendarObjectOptions) (*caldav.CalendarObject, error) {
-	log.Debug().Str("url_path", objPath).Msg("filesystem.PutCalendarObject()")
+	log.Debug().Str("path", objPath).Msg("filesystem.PutCalendarObject()")
 
 	_, uid, err := caldav.ValidateCalendarObject(calendar)
 	if err != nil {
-		return "", caldav.NewPreconditionError(caldav.PreconditionValidCalendarObjectResource)
+		return nil, caldav.NewPreconditionError(caldav.PreconditionValidCalendarObjectResource)
 	}
 
 	// Object always get saved as <UID>.ics
@@ -331,7 +317,7 @@ func (b *filesystemBackend) PutCalendarObject(ctx context.Context, objPath strin
 
 	localPath, err := b.safeLocalCalDAVPath(ctx, objPath)
 	if err != nil {
-		return "", err
+		return nil, err
 	}
 
 	flags := os.O_RDWR | os.O_CREATE | os.O_TRUNC
@@ -346,37 +332,53 @@ func (b *filesystemBackend) PutCalendarObject(ctx context.Context, objPath strin
 		// Make sure we overwrite the _right_ file
 		etag, err := etagForFile(localPath)
 		if err != nil {
-			return "", webdav.NewHTTPError(http.StatusPreconditionFailed, err)
+			return nil, webdav.NewHTTPError(http.StatusPreconditionFailed, err)
 		}
 		want, err := opts.IfMatch.ETag()
 		if err != nil {
-			return "", webdav.NewHTTPError(http.StatusBadRequest, err)
+			return nil, webdav.NewHTTPError(http.StatusBadRequest, err)
 		}
 		if want != etag {
 			err = fmt.Errorf("If-Match does not match current ETag (%s/%s)", want, etag)
-			return "", webdav.NewHTTPError(http.StatusPreconditionFailed, err)
+			return nil, webdav.NewHTTPError(http.StatusPreconditionFailed, err)
 		}
 	}
 
 	f, err := os.OpenFile(localPath, flags, 0666)
 	if os.IsExist(err) {
-		return "", caldav.NewPreconditionError(caldav.PreconditionNoUIDConflict)
+		return nil, caldav.NewPreconditionError(caldav.PreconditionNoUIDConflict)
 	} else if err != nil {
-		return "", err
+		return nil, err
 	}
 	defer f.Close()
 
 	enc := ical.NewEncoder(f)
 	err = enc.Encode(calendar)
 	if err != nil {
-		return "", err
+		return nil, err
 	}
 
-	return objPath, nil
+	etag, err := etagForFile(localPath)
+	if err != nil {
+		return nil, err
+	}
+	info, err := f.Stat()
+	if err != nil {
+		return nil, err
+	}
+
+	r := caldav.CalendarObject{
+		Path:          objPath,
+		ModTime:       info.ModTime(),
+		ContentLength: info.Size(),
+		ETag:          etag,
+		Data:          calendar,
+	}
+	return &r, nil
 }
 
 func (b *filesystemBackend) DeleteCalendarObject(ctx context.Context, path string) error {
-	log.Debug().Str("url_path", path).Msg("filesystem.DeleteCalendarObject()")
+	log.Debug().Str("path", path).Msg("filesystem.DeleteCalendarObject()")
 
 	localPath, err := b.safeLocalCalDAVPath(ctx, path)
 	if err != nil {

storage/filesystem_carddav.go

@@ -129,22 +129,51 @@ func (b *filesystemBackend) loadAllAddressObjects(ctx context.Context, urlPath s
 	return result, err
 }
 
-func (b *filesystemBackend) createDefaultAddressBook(ctx context.Context) (*carddav.AddressBook, error) {
+func (b *filesystemBackend) writeAddressBook(ctx context.Context, ab *carddav.AddressBook) error {
-	// TODO what should the default address book look like?
+	localPath, err := b.safeLocalCardDAVPath(ctx, ab.Path)
-	localPath, err_ := b.localCardDAVDir(ctx, defaultResourceName)
+	if err != nil {
-	if err_ != nil {
+		return err
-		return nil, fmt.Errorf("error creating default address book: %s", err_.Error())
 	}
 
-	homeSetPath, err_ := b.AddressBookHomeSetPath(ctx)
+	log.Debug().Str("local", localPath).Str("url", ab.Path).Msg("filesystem.writeAddressBook()")
-	if err_ != nil {
+
-		return nil, fmt.Errorf("error creating default address book: %s", err_.Error())
+	blob, err := json.MarshalIndent(ab, "", "  ")
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(path.Join(localPath, addressBookFileName), blob, 0644)
+	if err != nil {
+		return fmt.Errorf("error writing address book: %s", err.Error())
+	}
+	return nil
+}
+
+func (b *filesystemBackend) createAddressBook(ctx context.Context, ab *carddav.AddressBook) error {
+	localPath, err := b.safeLocalCardDAVPath(ctx, ab.Path)
+	if err != nil {
+		return err
+	}
+
+	log.Debug().Str("local", localPath).Str("url", ab.Path).Msg("filesystem.createAddressBook()")
+
+	err = os.Mkdir(localPath, 0755)
+	if err != nil {
+		return fmt.Errorf("error creating address book: %s", err.Error())
+	}
+	return b.writeAddressBook(ctx, ab)
+}
+
+func (b *filesystemBackend) createDefaultAddressBook(ctx context.Context) (*carddav.AddressBook, error) {
+	log.Debug().Msg("filesystem.createDefaultAddressBook()")
+
+	homeSetPath, err := b.AddressBookHomeSetPath(ctx)
+	if err != nil {
+		return nil, fmt.Errorf("error creating default address book: %s", err.Error())
 	}
 
 	urlPath := path.Join(homeSetPath, defaultResourceName) + "/"
 
-	log.Debug().Str("local", localPath).Str("url", urlPath).Msg("filesystem.createDefaultAddressBook()")
+	// TODO what should the default address book look like?
-
 	defaultAB := carddav.AddressBook{
 		Path:                 urlPath,
 		Name:                 "My contacts",
@@ -152,14 +181,8 @@ func (b *filesystemBackend) createDefaultAddressBook(ctx context.Context) (*card
 		MaxResourceSize:      1024,
 		SupportedAddressData: nil,
 	}
-	blob, err := json.MarshalIndent(defaultAB, "", "  ")
+	err = b.createAddressBook(ctx, &defaultAB)
-	if err != nil {
+	log.Debug().Err(err).Msg("filesystem.createDefaultAddressBook() done")
-		return nil, fmt.Errorf("error creating default address book: %s", err.Error())
-	}
-	err = os.WriteFile(path.Join(localPath, addressBookFileName), blob, 0644)
-	if err != nil {
-		return nil, fmt.Errorf("error writing default address book: %s", err.Error())
-	}
 	return &defaultAB, nil
 }
 
@@ -207,19 +230,12 @@ func (b *filesystemBackend) ListAddressBooks(ctx context.Context) ([]carddav.Add
 	if err == nil && len(result) == 0 {
 		// Nothing here yet? Create the default address book
 		log.Debug().Msg("no address books found, creating default address book")
-		ab, err_ := b.createDefaultAddressBook(ctx)
+		ab, err := b.createDefaultAddressBook(ctx)
-		if err_ != nil {
+		if err == nil {
-			log.Debug().Int("results", len(result)).Bool("success", false).Str("error", err_.Error()).Msg("filesystem.ListAddressBooks() done")
+			result = append(result, *ab)
-			return nil, fmt.Errorf("error creating default address book: %s", err_.Error())
 		}
-		result = append(result, *ab)
-	}
-
-	if err != nil {
-		log.Warn().Int("results", len(result)).Bool("success", false).Str("error", err.Error()).Msg("filesystem.ListAddressBooks() done")
-	} else {
-		log.Debug().Int("results", len(result)).Bool("success", true).Msg("filesystem.ListAddressBooks() done")
 	}
+	log.Debug().Int("results", len(result)).Err(err).Msg("filesystem.ListAddressBooks() done")
 	return result, err
 }
 
@@ -232,15 +248,14 @@ func (b *filesystemBackend) GetAddressBook(ctx context.Context, urlPath string)
 	}
 	localPath = filepath.Join(localPath, addressBookFileName)
 
-	log.Debug().Str("local_path", localPath).Msg("loading addressbook")
+	log.Debug().Str("path", localPath).Msg("loading addressbook")
 
-	data, readErr := os.ReadFile(localPath)
+	data, err := os.ReadFile(localPath)
-
+	if err != nil {
-	if readErr != nil {
+		if os.IsNotExist(err) {
-		if os.IsNotExist(readErr) {
 			return nil, webdav.NewHTTPError(404, err)
 		}
-		return nil, fmt.Errorf("error opening address book: %s", readErr.Error())
+		return nil, fmt.Errorf("error opening address book: %s", err.Error())
 	}
 	var addressBook carddav.AddressBook
 	err = json.Unmarshal(data, &addressBook)
@@ -251,8 +266,37 @@ func (b *filesystemBackend) GetAddressBook(ctx context.Context, urlPath string)
 	return &addressBook, nil
 }
 
+func (b *filesystemBackend) CreateAddressBook(ctx context.Context, ab *carddav.AddressBook) error {
+	log.Debug().Str("path", ab.Path).Msg("filesystem.CreateAddressBook()")
+	ab.MaxResourceSize = 4096
+	err := b.createAddressBook(ctx, ab)
+	log.Debug().Err(err).Msg("filesystem.CreateAddressBook() done")
+	return err
+}
+
+func (b *filesystemBackend) UpdateAddressBook(ctx context.Context, ab *carddav.AddressBook) error {
+	log.Debug().Str("path", ab.Path).Msg("filesystem.UpdateAddressBook()")
+	ab.MaxResourceSize = 4096
+	err := b.writeAddressBook(ctx, ab)
+	log.Debug().Err(err).Msg("filesystem.UpdateAddressBook() done")
+	return err
+}
+
+func (b *filesystemBackend) DeleteAddressBook(ctx context.Context, urlPath string) error {
+	log.Debug().Str("path", urlPath).Msg("filesystem.DeleteAddressBook()")
+
+	localPath, err := b.safeLocalCardDAVPath(ctx, urlPath)
+	if err != nil {
+		return err
+	}
+	log.Debug().Str("path", localPath).Msg("deleting addressbook")
+	err = os.RemoveAll(localPath)
+	log.Debug().Err(err).Msg("filesystem.DeleteAddressBook() done")
+	return err
+}
+
 func (b *filesystemBackend) GetAddressObject(ctx context.Context, objPath string, req *carddav.AddressDataRequest) (*carddav.AddressObject, error) {
-	log.Debug().Str("url_path", objPath).Msg("filesystem.GetAddressObject()")
+	log.Debug().Str("path", objPath).Msg("filesystem.GetAddressObject()")
 
 	localPath, err := b.safeLocalCardDAVPath(ctx, objPath)
 	if err != nil {
@@ -274,6 +318,7 @@ func (b *filesystemBackend) GetAddressObject(ctx context.Context, objPath string
 
 	card, err := vcardFromFile(localPath, propFilter)
 	if err != nil {
+		log.Debug().Str("path", localPath).Err(err).Msg("error reading calendar")
 		return nil, err
 	}
 
@@ -301,11 +346,7 @@ func (b *filesystemBackend) ListAddressObjects(ctx context.Context, urlPath stri
 	}
 
 	result, err := b.loadAllAddressObjects(ctx, urlPath, propFilter)
-	if err != nil {
+	log.Debug().Int("results", len(result)).Err(err).Msg("filesystem.ListAddressObjects() done")
-		log.Warn().Int("results", len(result)).Bool("success", false).Str("error", err.Error()).Msg("filesystem.ListAddressObjects() done")
-	} else {
-		log.Debug().Int("results", len(result)).Bool("success", true).Msg("filesystem.ListAddressObjects() done")
-	}
 	return result, err
 }
 
@@ -318,24 +359,18 @@ func (b *filesystemBackend) QueryAddressObjects(ctx context.Context, urlPath str
 	}
 
 	result, err := b.loadAllAddressObjects(ctx, urlPath, propFilter)
+	log.Debug().Int("results", len(result)).Err(err).Msg("filesystem.QueryAddressObjects() load done")
 	if err != nil {
-		log.Warn().Int("results", len(result)).Str("error", err.Error()).Msg("filesystem.QueryAddressObjects() error loading")
 		return result, err
 	}
 
-	log.Debug().Int("results", len(result)).Bool("success", true).Msg("filesystem.QueryAddressObjects() load done")
-
 	filtered, err := carddav.Filter(query, result)
-	if err != nil {
+	log.Debug().Int("results", len(filtered)).Err(err).Msg("filesystem.QueryAddressObjects() filter done")
-		log.Warn().Int("results", len(result)).Str("error", err.Error()).Msg("filesystem.QueryAddressObjects() error filtering")
+	return filtered, err
-		return result, err
-	}
-	log.Debug().Int("results", len(filtered)).Bool("success", true).Msg("filesystem.QueryAddressObjects() done")
-	return filtered, nil
 }
 
-func (b *filesystemBackend) PutAddressObject(ctx context.Context, objPath string, card vcard.Card, opts *carddav.PutAddressObjectOptions) (loc string, err error) {
+func (b *filesystemBackend) PutAddressObject(ctx context.Context, objPath string, card vcard.Card, opts *carddav.PutAddressObjectOptions) (*carddav.AddressObject, error) {
-	log.Debug().Str("url_path", objPath).Msg("filesystem.PutAddressObject()")
+	log.Debug().Str("path", objPath).Msg("filesystem.PutAddressObject()")
 
 	// Object always get saved as <UID>.vcf
 	dirname, _ := path.Split(objPath)
@@ -343,7 +378,7 @@ func (b *filesystemBackend) PutAddressObject(ctx context.Context, objPath string
 
 	localPath, err := b.safeLocalCardDAVPath(ctx, objPath)
 	if err != nil {
-		return "", err
+		return nil, err
 	}
 
 	flags := os.O_RDWR | os.O_CREATE | os.O_TRUNC
@@ -358,37 +393,52 @@ func (b *filesystemBackend) PutAddressObject(ctx context.Context, objPath string
 		// Make sure we overwrite the _right_ file
 		etag, err := etagForFile(localPath)
 		if err != nil {
-			return "", webdav.NewHTTPError(http.StatusPreconditionFailed, err)
+			return nil, webdav.NewHTTPError(http.StatusPreconditionFailed, err)
 		}
 		want, err := opts.IfMatch.ETag()
 		if err != nil {
-			return "", webdav.NewHTTPError(http.StatusBadRequest, err)
+			return nil, webdav.NewHTTPError(http.StatusBadRequest, err)
 		}
 		if want != etag {
 			err = fmt.Errorf("If-Match does not match current ETag (%s/%s)", want, etag)
-			return "", webdav.NewHTTPError(http.StatusPreconditionFailed, err)
+			return nil, webdav.NewHTTPError(http.StatusPreconditionFailed, err)
 		}
 	}
 
 	f, err := os.OpenFile(localPath, flags, 0666)
 	if os.IsExist(err) {
-		return "", carddav.NewPreconditionError(carddav.PreconditionNoUIDConflict)
+		return nil, carddav.NewPreconditionError(carddav.PreconditionNoUIDConflict)
 	} else if err != nil {
-		return "", err
+		return nil, err
 	}
 	defer f.Close()
 
 	enc := vcard.NewEncoder(f)
-	err = enc.Encode(card)
+	if err := enc.Encode(card); err != nil {
-	if err != nil {
+		return nil, err
-		return "", err
 	}
 
-	return objPath, nil
+	etag, err := etagForFile(localPath)
+	if err != nil {
+		return nil, err
+	}
+	info, err := f.Stat()
+	if err != nil {
+		return nil, err
+	}
+
+	r := carddav.AddressObject{
+		Path:          objPath,
+		ModTime:       info.ModTime(),
+		ContentLength: info.Size(),
+		ETag:          etag,
+		Card:          card,
+	}
+	return &r, nil
 }
 
 func (b *filesystemBackend) DeleteAddressObject(ctx context.Context, path string) error {
-	log.Debug().Str("url_path", path).Msg("filesystem.DeleteAddressObject()")
+	log.Debug().Str("path", path).Msg("filesystem.DeleteAddressObject()")
 
 	localPath, err := b.safeLocalCardDAVPath(ctx, path)
 	if err != nil {

storage/postgresql.go

@@ -32,6 +32,18 @@ func (*psqlBackend) GetAddressBook(ctx context.Context, path string) (*carddav.A
 	panic("TODO")
 }
 
+func (*psqlBackend) CreateAddressBook(ctx context.Context, ab *carddav.AddressBook) error {
+	panic("TODO")
+}
+
+func (*psqlBackend) UpdateAddressBook(ctx context.Context, ab *carddav.AddressBook) error {
+	panic("TODO")
+}
+
+func (*psqlBackend) DeleteAddressBook(ctx context.Context, path string) error {
+	panic("TODO")
+}
+
 func (*psqlBackend) GetAddressObject(ctx context.Context, path string, req *carddav.AddressDataRequest) (*carddav.AddressObject, error) {
 	panic("TODO")
 }
@@ -44,7 +56,7 @@ func (*psqlBackend) QueryAddressObjects(ctx context.Context, path string, query
 	panic("TODO")
 }
 
-func (*psqlBackend) PutAddressObject(ctx context.Context, path string, card vcard.Card, opts *carddav.PutAddressObjectOptions) (loc string, err error) {
+func (*psqlBackend) PutAddressObject(ctx context.Context, path string, card vcard.Card, opts *carddav.PutAddressObjectOptions) (*carddav.AddressObject, error) {
 	panic("TODO")
 }