octoleo/syncthing
1
0
Fork 0
mirror of https://github.com/octoleo/syncthing.git synced 2024-12-22 19:08:58 +00:00
Code Issues Packages Projects Releases Wiki Activity

lib/upnp: Refactor out methods to util with tests, refactor IGD

Browse Source
This commit is contained in:
Audrius Butkevicius 2016-03-25 20:22:29 +00:00 committed by Jakob Borg
parent 6a3f3f5577
commit 1d17891286
9 changed files with 497 additions and 300 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

148
lib/config/config.go
View File

@ -11,15 +11,12 @@ import (
"encoding/json"
"encoding/xml"
"io"
"math/rand"
"net/url"
"os"
"reflect"
"sort"
"strconv"
"strings"
"github.com/syncthing/syncthing/lib/protocol"
"github.com/syncthing/syncthing/lib/util"
)
const (
@ -58,9 +55,9 @@ func New(myID protocol.DeviceID) Configuration {
cfg.Version = CurrentVersion
cfg.OriginalVersion = CurrentVersion
setDefaults(&cfg)
setDefaults(&cfg.Options)
setDefaults(&cfg.GUI)
util.SetDefaults(&cfg)
util.SetDefaults(&cfg.Options)
util.SetDefaults(&cfg.GUI)
cfg.prepare(myID)
@ -70,9 +67,9 @@ func New(myID protocol.DeviceID) Configuration {
func ReadXML(r io.Reader, myID protocol.DeviceID) (Configuration, error) {
var cfg Configuration
setDefaults(&cfg)
setDefaults(&cfg.Options)
setDefaults(&cfg.GUI)
util.SetDefaults(&cfg)
util.SetDefaults(&cfg.Options)
util.SetDefaults(&cfg.GUI)
err := xml.NewDecoder(r).Decode(&cfg)
cfg.OriginalVersion = cfg.Version
@ -84,9 +81,9 @@ func ReadXML(r io.Reader, myID protocol.DeviceID) (Configuration, error) {
func ReadJSON(r io.Reader, myID protocol.DeviceID) (Configuration, error) {
var cfg Configuration
setDefaults(&cfg)
setDefaults(&cfg.Options)
setDefaults(&cfg.GUI)
util.SetDefaults(&cfg)
util.SetDefaults(&cfg.Options)
util.SetDefaults(&cfg.GUI)
err := json.NewDecoder(r).Decode(&cfg)
cfg.OriginalVersion = cfg.Version
@ -143,7 +140,7 @@ func (cfg *Configuration) WriteXML(w io.Writer) error {
}
func (cfg *Configuration) prepare(myID protocol.DeviceID) {
fillNilSlices(&cfg.Options)
util.FillNilSlices(&cfg.Options)
// Initialize any empty slices
if cfg.Folders == nil {
@ -171,8 +168,8 @@ func (cfg *Configuration) prepare(myID protocol.DeviceID) {
}
}
cfg.Options.ListenAddress = uniqueStrings(cfg.Options.ListenAddress)
cfg.Options.GlobalAnnServers = uniqueStrings(cfg.Options.GlobalAnnServers)
cfg.Options.ListenAddress = util.UniqueStrings(cfg.Options.ListenAddress)
cfg.Options.GlobalAnnServers = util.UniqueStrings(cfg.Options.GlobalAnnServers)
if cfg.Version > 0 && cfg.Version < OldestHandledVersion {
l.Warnf("Configuration version %d is deprecated. Attempting best effort conversion, but please verify manually.", cfg.Version)
@ -234,7 +231,7 @@ func (cfg *Configuration) prepare(myID protocol.DeviceID) {
}
if cfg.GUI.APIKey == "" {
cfg.GUI.APIKey = randomString(32)
cfg.GUI.APIKey = util.RandomString(32)
}
}
@ -242,14 +239,14 @@ func convertV11V12(cfg *Configuration) {
// Change listen address schema
for i, addr := range cfg.Options.ListenAddress {
if len(addr) > 0 && !strings.HasPrefix(addr, "tcp://") {
cfg.Options.ListenAddress[i] = tcpAddr(addr)
cfg.Options.ListenAddress[i] = util.Address("tcp", addr)
}
}
for i, device := range cfg.Devices {
for j, addr := range device.Addresses {
if addr != "dynamic" && addr != "" {
cfg.Devices[i].Addresses[j] = tcpAddr(addr)
cfg.Devices[i].Addresses[j] = util.Address("tcp", addr)
}
}
}
@ -297,98 +294,6 @@ func convertV10V11(cfg *Configuration) {
cfg.Version = 11
}
func setDefaults(data interface{}) error {
s := reflect.ValueOf(data).Elem()
t := s.Type()
for i := 0; i < s.NumField(); i++ {
f := s.Field(i)
tag := t.Field(i).Tag
v := tag.Get("default")
if len(v) > 0 {
switch f.Interface().(type) {
case string:
f.SetString(v)
case int:
i, err := strconv.ParseInt(v, 10, 64)
if err != nil {
return err
}
f.SetInt(i)
case float64:
i, err := strconv.ParseFloat(v, 64)
if err != nil {
return err
}
f.SetFloat(i)
case bool:
f.SetBool(v == "true")
case []string:
// We don't do anything with string slices here. Any default
// we set will be appended to by the XML decoder, so we fill
// those after decoding.
default:
panic(f.Type())
}
}
}
return nil
}
// fillNilSlices sets default value on slices that are still nil.
func fillNilSlices(data interface{}) error {
s := reflect.ValueOf(data).Elem()
t := s.Type()
for i := 0; i < s.NumField(); i++ {
f := s.Field(i)
tag := t.Field(i).Tag
v := tag.Get("default")
if len(v) > 0 {
switch f.Interface().(type) {
case []string:
if f.IsNil() {
// Treat the default as a comma separated slice
vs := strings.Split(v, ",")
for i := range vs {
vs[i] = strings.TrimSpace(vs[i])
}
rv := reflect.MakeSlice(reflect.TypeOf([]string{}), len(vs), len(vs))
for i, v := range vs {
rv.Index(i).SetString(v)
}
f.Set(rv)
}
}
}
}
return nil
}
func uniqueStrings(ss []string) []string {
var m = make(map[string]bool, len(ss))
for _, s := range ss {
m[strings.Trim(s, " ")] = true
}
var us = make([]string, 0, len(m))
for k := range m {
us = append(us, k)
}
sort.Strings(us)
return us
}
func ensureDevicePresent(devices []FolderDeviceConfiguration, myID protocol.DeviceID) []FolderDeviceConfiguration {
for _, device := range devices {
if device.DeviceID.Equals(myID) {
@ -453,24 +358,3 @@ loop:
}
return devices[0:count]
}
// randomCharset contains the characters that can make up a randomString().
const randomCharset = "01234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-"
// randomString returns a string of random characters (taken from
// randomCharset) of the specified length.
func randomString(l int) string {
bs := make([]byte, l)
for i := range bs {
bs[i] = randomCharset[rand.Intn(len(randomCharset))]
}
return string(bs)
}
func tcpAddr(host string) string {
u := url.URL{
Scheme: "tcp",
Host: host,
}
return u.String()
}

3
lib/config/wrapper.go
View File

@ -13,6 +13,7 @@ import (
"github.com/syncthing/syncthing/lib/osutil"
"github.com/syncthing/syncthing/lib/protocol"
"github.com/syncthing/syncthing/lib/sync"
"github.com/syncthing/syncthing/lib/util"
)
// The Committer interface is implemented by objects that need to know about
@ -321,5 +322,5 @@ func (w *Wrapper) GlobalDiscoveryServers() []string {
servers = append(servers, srv)
}
}
return uniqueStrings(servers)
return util.UniqueStrings(servers)
}

17
lib/connections/connections.go
View File

@ -24,6 +24,7 @@ import (
"github.com/syncthing/syncthing/lib/relay"
"github.com/syncthing/syncthing/lib/relay/client"
"github.com/syncthing/syncthing/lib/upnp"
"github.com/syncthing/syncthing/lib/util"
"github.com/thejerf/suture"
)
@ -504,7 +505,7 @@ func (s *Service) addresses(includePrivateIPV4 bool) []string {
l.Infoln("Listen address", addrStr, "is invalid:", err)
continue
}
addr, err := net.ResolveTCPAddr("tcp", addrURL.Host)
addr, err := net.ResolveTCPAddr(addrURL.Scheme, addrURL.Host)
if err != nil {
l.Infoln("Listen address", addrStr, "is invalid:", err)
continue
@ -512,13 +513,13 @@ func (s *Service) addresses(includePrivateIPV4 bool) []string {
if addr.IP == nil || addr.IP.IsUnspecified() {
// Address like 0.0.0.0:22000 or [::]:22000 or :22000; include as is.
addrs = append(addrs, tcpAddr(addr.String()))
addrs = append(addrs, util.Address(addrURL.Scheme, addr.String()))
} else if isPublicIPv4(addr.IP) || isPublicIPv6(addr.IP) {
// A public address; include as is.
addrs = append(addrs, tcpAddr(addr.String()))
addrs = append(addrs, util.Address(addrURL.Scheme, addr.String()))
} else if includePrivateIPV4 && addr.IP.To4().IsGlobalUnicast() {
// A private IPv4 address.
addrs = append(addrs, tcpAddr(addr.String()))
addrs = append(addrs, util.Address(addrURL.Scheme, addr.String()))
}
}
@ -567,14 +568,6 @@ func isPublicIPv6(ip net.IP) bool {
return ip.IsGlobalUnicast()
}
func tcpAddr(host string) string {
u := url.URL{
Scheme: "tcp",
Host: host,
}
return u.String()
}
// serviceFunc wraps a function to create a suture.Service without stop
// functionality.
type serviceFunc func()

4
lib/upnp/debug.go
View File

@ -20,7 +20,3 @@ var (
func init() {
l.SetDebug("upnp", strings.Contains(os.Getenv("STTRACE"), "upnp") || os.Getenv("STTRACE") == "all")
}
func shouldDebug() bool {
return l.ShouldDebug("upnp")
}

91
lib/upnp/igd.go Normal file
View File

@ -0,0 +1,91 @@
// Copyright (C) 2016 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
// Adapted from https://github.com/jackpal/Taipei-Torrent/blob/dd88a8bfac6431c01d959ce3c745e74b8a911793/IGD.go
// Copyright (c) 2010 Jack Palevich (https://github.com/jackpal/Taipei-Torrent/blob/dd88a8bfac6431c01d959ce3c745e74b8a911793/LICENSE)
package upnp
import (
"net"
"net/url"
"strings"
)
// An IGD is a UPnP InternetGatewayDevice.
type IGD struct {
uuid string
friendlyName string
services []IGDService
url *url.URL
localIPAddress net.IP
}
func (n *IGD) UUID() string {
return n.uuid
}
func (n *IGD) FriendlyName() string {
return n.friendlyName
}
// FriendlyIdentifier returns a friendly identifier (friendly name + IP
// address) for the IGD.
func (n *IGD) FriendlyIdentifier() string {
return "'" + n.FriendlyName() + "' (" + strings.Split(n.URL().Host, ":")[0] + ")"
}
func (n *IGD) URL() *url.URL {
return n.url
}
// AddPortMapping adds a port mapping to all relevant services on the
// specified InternetGatewayDevice. Port mapping will fail and return an error
// if action is fails for _any_ of the relevant services. For this reason, it
// is generally better to configure port mapping for each individual service
// instead.
func (n *IGD) AddPortMapping(protocol Protocol, externalPort, internalPort int, description string, timeout int) error {
for _, service := range n.services {
err := service.AddPortMapping(n.localIPAddress, protocol, externalPort, internalPort, description, timeout)
if err != nil {
return err
}
}
return nil
}
// DeletePortMapping deletes a port mapping from all relevant services on the
// specified InternetGatewayDevice. Port mapping will fail and return an error
// if action is fails for _any_ of the relevant services. For this reason, it
// is generally better to configure port mapping for each individual service
// instead.
func (n *IGD) DeletePortMapping(protocol Protocol, externalPort int) error {
for _, service := range n.services {
err := service.DeletePortMapping(protocol, externalPort)
if err != nil {
return err
}
}
return nil
}
// GetExternalIPAddress returns the external IP address of the IGD, or an error
// if no service providing this feature exists.
func (n *IGD) GetExternalIPAddress() (ip net.IP, err error) {
for _, service := range n.services {
ip, err = service.GetExternalIPAddress()
if err == nil {
break
}
}
return
}
// GetLocalIPAddress returns the IP address of the local network interface
// which is facing the IGD.
func (n *IGD) GetLocalIPAddress() net.IP {
return n.localIPAddress
}

95
lib/upnp/igd_service.go Normal file
View File

@ -0,0 +1,95 @@
// Copyright (C) 2016 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
// Adapted from https://github.com/jackpal/Taipei-Torrent/blob/dd88a8bfac6431c01d959ce3c745e74b8a911793/IGD.go
// Copyright (c) 2010 Jack Palevich (https://github.com/jackpal/Taipei-Torrent/blob/dd88a8bfac6431c01d959ce3c745e74b8a911793/LICENSE)
package upnp
import (
"encoding/xml"
"fmt"
"net"
)
// An IGDService is a specific service provided by an IGD.
type IGDService struct {
ID string
URL string
URN string
}
// AddPortMapping adds a port mapping to the specified IGD service.
func (s *IGDService) AddPortMapping(localIPAddress net.IP, protocol Protocol, externalPort, internalPort int, description string, timeout int) error {
tpl := `<u:AddPortMapping xmlns:u="%s">
<NewRemoteHost></NewRemoteHost>
<NewExternalPort>%d</NewExternalPort>
<NewProtocol>%s</NewProtocol>
<NewInternalPort>%d</NewInternalPort>
<NewInternalClient>%s</NewInternalClient>
<NewEnabled>1</NewEnabled>
<NewPortMappingDescription>%s</NewPortMappingDescription>
<NewLeaseDuration>%d</NewLeaseDuration>
</u:AddPortMapping>`
body := fmt.Sprintf(tpl, s.URN, externalPort, protocol, internalPort, localIPAddress, description, timeout)
response, err := soapRequest(s.URL, s.URN, "AddPortMapping", body)
if err != nil && timeout > 0 {
// Try to repair error code 725 - OnlyPermanentLeasesSupported
envelope := &soapErrorResponse{}
if unmarshalErr := xml.Unmarshal(response, envelope); unmarshalErr != nil {
return unmarshalErr
}
if envelope.ErrorCode == 725 {
return s.AddPortMapping(localIPAddress, protocol, externalPort, internalPort, description, 0)
}
}
return err
}
// DeletePortMapping deletes a port mapping from the specified IGD service.
func (s *IGDService) DeletePortMapping(protocol Protocol, externalPort int) error {
tpl := `<u:DeletePortMapping xmlns:u="%s">
<NewRemoteHost></NewRemoteHost>
<NewExternalPort>%d</NewExternalPort>
<NewProtocol>%s</NewProtocol>
</u:DeletePortMapping>`
body := fmt.Sprintf(tpl, s.URN, externalPort, protocol)
_, err := soapRequest(s.URL, s.URN, "DeletePortMapping", body)
if err != nil {
return err
}
return nil
}
// GetExternalIPAddress queries the IGD service for its external IP address.
// Returns nil if the external IP address is invalid or undefined, along with
// any relevant errors
func (s *IGDService) GetExternalIPAddress() (net.IP, error) {
tpl := `<u:GetExternalIPAddress xmlns:u="%s" />`
body := fmt.Sprintf(tpl, s.URN)
response, err := soapRequest(s.URL, s.URN, "GetExternalIPAddress", body)
if err != nil {
return nil, err
}
envelope := &soapGetExternalIPAddressResponseEnvelope{}
err = xml.Unmarshal(response, envelope)
if err != nil {
return nil, err
}
result := net.ParseIP(envelope.Body.GetExternalIPAddressResponse.NewExternalIPAddress)
return result, nil
}

162
lib/upnp/upnp.go
View File

@ -29,40 +29,6 @@ import (
"github.com/syncthing/syncthing/lib/sync"
)
// An IGD is a UPnP InternetGatewayDevice.
type IGD struct {
uuid string
friendlyName string
services []IGDService
url *url.URL
localIPAddress string
}
func (n *IGD) UUID() string {
return n.uuid
}
func (n *IGD) FriendlyName() string {
return n.friendlyName
}
// FriendlyIdentifier returns a friendly identifier (friendly name + IP
// address) for the IGD.
func (n *IGD) FriendlyIdentifier() string {
return "'" + n.FriendlyName() + "' (" + strings.Split(n.URL().Host, ":")[0] + ")"
}
func (n *IGD) URL() *url.URL {
return n.url
}
// An IGDService is a specific service provided by an IGD.
type IGDService struct {
ID string
URL string
URN string
}
type Protocol string
const (
@ -126,22 +92,18 @@ nextResult:
for result := range resultChan {
for _, existingResult := range results {
if existingResult.uuid == result.uuid {
if shouldDebug() {
l.Debugf("Skipping duplicate result %s with services:", result.uuid)
for _, service := range result.services {
l.Debugf("* [%s] %s", service.ID, service.URL)
}
l.Debugf("Skipping duplicate result %s with services:", result.uuid)
for _, service := range result.services {
l.Debugf("* [%s] %s", service.ID, service.URL)
}
continue nextResult
}
}
results = append(results, result)
if shouldDebug() {
l.Debugf("UPnP discovery result %s with services:", result.uuid)
for _, service := range result.services {
l.Debugf("* [%s] %s", service.ID, service.URL)
}
l.Debugf("UPnP discovery result %s with services:", result.uuid)
for _, service := range result.services {
l.Debugf("* [%s] %s", service.ID, service.URL)
}
}
@ -286,19 +248,19 @@ func parseResponse(deviceType string, resp []byte) (IGD, error) {
}, nil
}
func localIP(url *url.URL) (string, error) {
conn, err := dialer.Dial("tcp", url.Host)
func localIP(url *url.URL) (net.IP, error) {
conn, err := dialer.DialTimeout("tcp", url.Host, time.Second)
if err != nil {
return "", err
return nil, err
}
defer conn.Close()
localIPAddress, _, err := net.SplitHostPort(conn.LocalAddr().String())
if err != nil {
return "", err
return nil, err
}
return localIPAddress, nil
return net.ParseIP(localIPAddress), nil
}
func getChildDevices(d upnpDevice, deviceType string) []upnpDevice {
@ -460,36 +422,6 @@ func soapRequest(url, service, function, message string) ([]byte, error) {
return resp, nil
}
// AddPortMapping adds a port mapping to all relevant services on the
// specified InternetGatewayDevice. Port mapping will fail and return an error
// if action is fails for _any_ of the relevant services. For this reason, it
// is generally better to configure port mapping for each individual service
// instead.
func (n *IGD) AddPortMapping(protocol Protocol, externalPort, internalPort int, description string, timeout int) error {
for _, service := range n.services {
err := service.AddPortMapping(n.localIPAddress, protocol, externalPort, internalPort, description, timeout)
if err != nil {
return err
}
}
return nil
}
// DeletePortMapping deletes a port mapping from all relevant services on the
// specified InternetGatewayDevice. Port mapping will fail and return an error
// if action is fails for _any_ of the relevant services. For this reason, it
// is generally better to configure port mapping for each individual service
// instead.
func (n *IGD) DeletePortMapping(protocol Protocol, externalPort int) error {
for _, service := range n.services {
err := service.DeletePortMapping(protocol, externalPort)
if err != nil {
return err
}
}
return nil
}
type soapGetExternalIPAddressResponseEnvelope struct {
XMLName xml.Name
Body soapGetExternalIPAddressResponseBody `xml:"Body"`
@ -508,75 +440,3 @@ type soapErrorResponse struct {
ErrorCode int `xml:"Body>Fault>detail>UPnPError>errorCode"`
ErrorDescription string `xml:"Body>Fault>detail>UPnPError>errorDescription"`
}
// AddPortMapping adds a port mapping to the specified IGD service.
func (s *IGDService) AddPortMapping(localIPAddress string, protocol Protocol, externalPort, internalPort int, description string, timeout int) error {
tpl := `<u:AddPortMapping xmlns:u="%s">
<NewRemoteHost></NewRemoteHost>
<NewExternalPort>%d</NewExternalPort>
<NewProtocol>%s</NewProtocol>
<NewInternalPort>%d</NewInternalPort>
<NewInternalClient>%s</NewInternalClient>
<NewEnabled>1</NewEnabled>
<NewPortMappingDescription>%s</NewPortMappingDescription>
<NewLeaseDuration>%d</NewLeaseDuration>
</u:AddPortMapping>`
body := fmt.Sprintf(tpl, s.URN, externalPort, protocol, internalPort, localIPAddress, description, timeout)
response, err := soapRequest(s.URL, s.URN, "AddPortMapping", body)
if err != nil && timeout > 0 {
// Try to repair error code 725 - OnlyPermanentLeasesSupported
envelope := &soapErrorResponse{}
if unmarshalErr := xml.Unmarshal(response, envelope); unmarshalErr != nil {
return unmarshalErr
}
if envelope.ErrorCode == 725 {
return s.AddPortMapping(localIPAddress, protocol, externalPort, internalPort, description, 0)
}
}
return err
}
// DeletePortMapping deletes a port mapping from the specified IGD service.
func (s *IGDService) DeletePortMapping(protocol Protocol, externalPort int) error {
tpl := `<u:DeletePortMapping xmlns:u="%s">
<NewRemoteHost></NewRemoteHost>
<NewExternalPort>%d</NewExternalPort>
<NewProtocol>%s</NewProtocol>
</u:DeletePortMapping>`
body := fmt.Sprintf(tpl, s.URN, externalPort, protocol)
_, err := soapRequest(s.URL, s.URN, "DeletePortMapping", body)
if err != nil {
return err
}
return nil
}
// GetExternalIPAddress queries the IGD service for its external IP address.
// Returns nil if the external IP address is invalid or undefined, along with
// any relevant errors
func (s *IGDService) GetExternalIPAddress() (net.IP, error) {
tpl := `<u:GetExternalIPAddress xmlns:u="%s" />`
body := fmt.Sprintf(tpl, s.URN)
response, err := soapRequest(s.URL, s.URN, "GetExternalIPAddress", body)
if err != nil {
return nil, err
}
envelope := &soapGetExternalIPAddressResponseEnvelope{}
err = xml.Unmarshal(response, envelope)
if err != nil {
return nil, err
}
result := net.ParseIP(envelope.Body.GetExternalIPAddressResponse.NewExternalIPAddress)
return result, nil
}

119
lib/util/utils.go Normal file
View File

@ -0,0 +1,119 @@
// Copyright (C) 2016 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package util
import (
"net/url"
"reflect"
"sort"
"strconv"
"strings"
)
// SetDefaults sets default values on a struct, based on the default annotation.
func SetDefaults(data interface{}) error {
s := reflect.ValueOf(data).Elem()
t := s.Type()
for i := 0; i < s.NumField(); i++ {
f := s.Field(i)
tag := t.Field(i).Tag
v := tag.Get("default")
if len(v) > 0 {
switch f.Interface().(type) {
case string:
f.SetString(v)
case int:
i, err := strconv.ParseInt(v, 10, 64)
if err != nil {
return err
}
f.SetInt(i)
case float64:
i, err := strconv.ParseFloat(v, 64)
if err != nil {
return err
}
f.SetFloat(i)
case bool:
f.SetBool(v == "true")
case []string:
// We don't do anything with string slices here. Any default
// we set will be appended to by the XML decoder, so we fill
// those after decoding.
default:
panic(f.Type())
}
}
}
return nil
}
// UniqueStrings returns a list on unique strings, trimming and sorting them
// at the same time.
func UniqueStrings(ss []string) []string {
var m = make(map[string]bool, len(ss))
for _, s := range ss {
m[strings.Trim(s, " ")] = true
}
var us = make([]string, 0, len(m))
for k := range m {
us = append(us, k)
}
sort.Strings(us)
return us
}
// FillNilSlices sets default value on slices that are still nil.
func FillNilSlices(data interface{}) error {
s := reflect.ValueOf(data).Elem()
t := s.Type()
for i := 0; i < s.NumField(); i++ {
f := s.Field(i)
tag := t.Field(i).Tag
v := tag.Get("default")
if len(v) > 0 {
switch f.Interface().(type) {
case []string:
if f.IsNil() {
// Treat the default as a comma separated slice
vs := strings.Split(v, ",")
for i := range vs {
vs[i] = strings.TrimSpace(vs[i])
}
rv := reflect.MakeSlice(reflect.TypeOf([]string{}), len(vs), len(vs))
for i, v := range vs {
rv.Index(i).SetString(v)
}
f.Set(rv)
}
}
}
}
return nil
}
// Address constructs a URL from the given network and hostname.
func Address(network, host string) string {
u := url.URL{
Scheme: network,
Host: host,
}
return u.String()
}

158
lib/util/utils_test.go Normal file
View File

@ -0,0 +1,158 @@
// Copyright (C) 2016 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package util
import "testing"
func TestSetDefaults(t *testing.T) {
x := &struct {
A string `default:"string"`
B int `default:"2"`
C float64 `default:"2.2"`
D bool `default:"true"`
}{}
if x.A != "" {
t.Error("string failed")
} else if x.B != 0 {
t.Error("int failed")
} else if x.C != 0 {
t.Errorf("float failed")
} else if x.D != false {
t.Errorf("bool failed")
}
if err := SetDefaults(x); err != nil {
t.Error(err)
}
if x.A != "string" {
t.Error("string failed")
} else if x.B != 2 {
t.Error("int failed")
} else if x.C != 2.2 {
t.Errorf("float failed")
} else if x.D != true {
t.Errorf("bool failed")
}
}
func TestUniqueStrings(t *testing.T) {
tests := []struct {
input []string
expected []string
}{
{
[]string{"a", "b"},
[]string{"a", "b"},
},
{
[]string{"a", "a"},
[]string{"a"},
},
{
[]string{"a", "a", "a", "a"},
[]string{"a"},
},
{
nil,
nil,
},
{
[]string{"b", "a"},
[]string{"a", "b"},
},
{
[]string{" a ", " a ", "b ", " b"},
[]string{"a", "b"},
},
}
for _, test := range tests {
result := UniqueStrings(test.input)
if len(result) != len(test.expected) {
t.Errorf("%s != %s", result, test.expected)
}
for i := range result {
if test.expected[i] != result[i] {
t.Errorf("%s != %s", result, test.expected)
}
}
}
}
func TestFillNillSlices(t *testing.T) {
// Nil
x := &struct {
A []string `default:"a,b"`
}{}
if x.A != nil {
t.Error("not nil")
}
if err := FillNilSlices(x); err != nil {
t.Error(err)
}
if len(x.A) != 2 {
t.Error("length")
}
// Already provided
y := &struct {
A []string `default:"c,d,e"`
}{[]string{"a", "b"}}
if len(y.A) != 2 {
t.Error("length")
}
if err := FillNilSlices(y); err != nil {
t.Error(err)
}
if len(y.A) != 2 {
t.Error("length")
}
// Non-nil but empty
z := &struct {
A []string `default:"c,d,e"`
}{[]string{}}
if len(z.A) != 0 {
t.Error("length")
}
if err := FillNilSlices(z); err != nil {
t.Error(err)
}
if len(z.A) != 0 {
t.Error("length")
}
}
func TestAddress(t *testing.T) {
tests := []struct {
network string
host string
result string
}{
{"tcp", "google.com", "tcp://google.com"},
{"foo", "google", "foo://google"},
{"123", "456", "123://456"},
}
for _, test := range tests {
result := Address(test.network, test.host)
if result != test.result {
t.Errorf("%s != %s", result, test.result)
}
}
}