go-webdav/carddav/client.go
2020-01-20 13:17:19 +01:00

235 lines
5.2 KiB
Go

package carddav
import (
"bytes"
"fmt"
"net"
"net/http"
"net/url"
"strings"
"github.com/emersion/go-vcard"
"github.com/emersion/go-webdav"
"github.com/emersion/go-webdav/internal"
)
// Discover performs a DNS-based CardDAV service discovery as described in
// RFC 6352 section 11. It returns the URL to the CardDAV server.
func Discover(domain string) (string, error) {
// Only lookup carddavs (not carddav), plaintext connections are insecure
_, addrs, err := net.LookupSRV("carddavs", "tcp", domain)
if dnsErr, ok := err.(*net.DNSError); ok {
if dnsErr.IsTemporary {
return "", err
}
} else if err != nil {
return "", err
}
if len(addrs) == 0 {
return "", fmt.Errorf("carddav: domain doesn't have an SRV record")
}
addr := addrs[0]
target := strings.TrimSuffix(addr.Target, ".")
if target == "" {
return "", nil
}
u := url.URL{Scheme: "https"}
if addr.Port == 443 {
u.Host = addr.Target
} else {
u.Host = fmt.Sprintf("%v:%v", target, addr.Port)
}
return u.String(), nil
}
type Client struct {
*webdav.Client
ic *internal.Client
}
func NewClient(c *http.Client, endpoint string) (*Client, error) {
wc, err := webdav.NewClient(c, endpoint)
if err != nil {
return nil, err
}
ic, err := internal.NewClient(c, endpoint)
if err != nil {
return nil, err
}
return &Client{wc, ic}, nil
}
func (c *Client) SetBasicAuth(username, password string) {
c.Client.SetBasicAuth(username, password)
c.ic.SetBasicAuth(username, password)
}
func (c *Client) FindAddressBookHomeSet(principal string) (string, error) {
propfind := internal.NewPropNamePropfind(addressBookHomeSetName)
resp, err := c.ic.PropfindFlat(principal, propfind)
if err != nil {
return "", err
}
var prop addressbookHomeSet
if err := resp.DecodeProp(&prop); err != nil {
return "", err
}
return prop.Href, nil
}
func (c *Client) FindAddressBooks(addressBookHomeSet string) ([]AddressBook, error) {
propfind := internal.NewPropNamePropfind(
internal.ResourceTypeName,
internal.DisplayNameName,
addressBookDescriptionName,
maxResourceSizeName,
)
ms, err := c.ic.Propfind(addressBookHomeSet, internal.DepthOne, propfind)
if err != nil {
return nil, err
}
l := make([]AddressBook, 0, len(ms.Responses))
for _, resp := range ms.Responses {
href, err := resp.Href()
if err != nil {
return nil, err
}
var resTypeProp internal.ResourceType
if err := resp.DecodeProp(&resTypeProp); err != nil {
return nil, err
}
if !resTypeProp.Is(addressBookName) {
continue
}
var descProp addressbookDescription
if err := resp.DecodeProp(&descProp); err != nil && !internal.IsNotFound(err) {
return nil, err
}
var dispNameProp internal.DisplayName
if err := resp.DecodeProp(&dispNameProp); err != nil && !internal.IsNotFound(err) {
return nil, err
}
var maxResSize maxResourceSize
if err := resp.DecodeProp(&maxResSize); err != nil && !internal.IsNotFound(err) {
return nil, err
}
if maxResSize.Size < 0 {
return nil, fmt.Errorf("carddav: max-resource-size must be a positive integer")
}
l = append(l, AddressBook{
Href: href,
Name: dispNameProp.Name,
Description: descProp.Description,
MaxResourceSize: maxResSize.Size,
})
}
return l, nil
}
func decodeAddressList(ms *internal.Multistatus) ([]AddressObject, error) {
addrs := make([]AddressObject, 0, len(ms.Responses))
for _, resp := range ms.Responses {
href, err := resp.Href()
if err != nil {
return nil, err
}
var addrData addressDataResp
if err := resp.DecodeProp(&addrData); err != nil {
return nil, err
}
r := bytes.NewReader(addrData.Data)
card, err := vcard.NewDecoder(r).Decode()
if err != nil {
return nil, err
}
addrs = append(addrs, AddressObject{
Href: href,
Card: card,
})
}
return addrs, nil
}
func (c *Client) QueryAddressBook(addressBook string, query *AddressBookQuery) ([]AddressObject, error) {
var addrDataReq addressDataReq
if query != nil {
for _, name := range query.Props {
addrDataReq.Props = append(addrDataReq.Props, prop{Name: name})
}
}
propReq, err := internal.EncodeProp(&addrDataReq)
if err != nil {
return nil, err
}
addressbookQuery := addressbookQuery{Prop: propReq}
req, err := c.ic.NewXMLRequest("REPORT", addressBook, &addressbookQuery)
if err != nil {
return nil, err
}
req.Header.Add("Depth", "1")
ms, err := c.ic.DoMultiStatus(req)
if err != nil {
return nil, err
}
return decodeAddressList(ms)
}
func (c *Client) MultiGetAddressBook(href string, multiGet *AddressBookMultiGet) ([]AddressObject, error) {
var addrDataReq addressDataReq
if multiGet != nil {
for _, name := range multiGet.Props {
addrDataReq.Props = append(addrDataReq.Props, prop{Name: name})
}
}
propReq, err := internal.EncodeProp(&addrDataReq)
if err != nil {
return nil, err
}
addressbookMultiget := addressbookMultiget{Prop: propReq}
if multiGet == nil || len(multiGet.Hrefs) == 0 {
addressbookMultiget.Hrefs = []string{href}
} else {
addressbookMultiget.Hrefs = multiGet.Hrefs
}
req, err := c.ic.NewXMLRequest("REPORT", href, &addressbookMultiget)
if err != nil {
return nil, err
}
req.Header.Add("Depth", "1")
ms, err := c.ic.DoMultiStatus(req)
if err != nil {
return nil, err
}
return decodeAddressList(ms)
}