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parser.go
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parser.go
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package outboundgroup
import (
"errors"
"fmt"
"github.com/l552121229/clash-core-backup/adapter/outbound"
"github.com/l552121229/clash-core-backup/adapter/provider"
"github.com/l552121229/clash-core-backup/common/structure"
C "github.com/l552121229/clash-core-backup/constant"
types "github.com/l552121229/clash-core-backup/constant/provider"
regexp "github.com/dlclark/regexp2"
)
var (
errFormat = errors.New("format error")
errType = errors.New("unsupport type")
errMissProxy = errors.New("`use` or `proxies` missing")
errMissHealthCheck = errors.New("`url` or `interval` missing")
errDuplicateProvider = errors.New("duplicate provider name")
)
type GroupCommonOption struct {
outbound.BasicOption
Name string `group:"name"`
Type string `group:"type"`
Proxies []string `group:"proxies,omitempty"`
Use []string `group:"use,omitempty"`
URL string `group:"url,omitempty"`
Interval int `group:"interval,omitempty"`
Lazy bool `group:"lazy,omitempty"`
DisableUDP bool `group:"disable-udp,omitempty"`
Filter string `group:"filter,omitempty"`
}
func ParseProxyGroup(config map[string]any, proxyMap map[string]C.Proxy, providersMap map[string]types.ProxyProvider) (C.ProxyAdapter, error) {
decoder := structure.NewDecoder(structure.Option{TagName: "group", WeaklyTypedInput: true})
groupOption := &GroupCommonOption{
Lazy: true,
}
if err := decoder.Decode(config, groupOption); err != nil {
return nil, errFormat
}
if groupOption.Type == "" || groupOption.Name == "" {
return nil, errFormat
}
var (
groupName = groupOption.Name
filterReg *regexp.Regexp
)
if groupOption.Filter != "" {
f, err := regexp.Compile(groupOption.Filter, regexp.None)
if err != nil {
return nil, fmt.Errorf("%s: invalid filter regex: %w", groupName, err)
}
filterReg = f
}
if len(groupOption.Proxies) == 0 && len(groupOption.Use) == 0 {
return nil, fmt.Errorf("%s: %w", groupName, errMissProxy)
}
providers := []types.ProxyProvider{}
if len(groupOption.Proxies) != 0 {
ps, err := getProxies(proxyMap, groupOption.Proxies)
if err != nil {
return nil, fmt.Errorf("%s: %w", groupName, err)
}
if _, ok := providersMap[groupName]; ok {
return nil, fmt.Errorf("%s: %w", groupName, errDuplicateProvider)
}
// select don't need health check
if groupOption.Type == "select" || groupOption.Type == "relay" {
hc := provider.NewHealthCheck(ps, "", 0, true)
pd, err := provider.NewCompatibleProvider(groupName, ps, hc)
if err != nil {
return nil, fmt.Errorf("%s: %w", groupName, err)
}
providers = append(providers, pd)
providersMap[groupName] = pd
} else {
if groupOption.URL == "" || groupOption.Interval == 0 {
return nil, fmt.Errorf("%s: %w", groupName, errMissHealthCheck)
}
hc := provider.NewHealthCheck(ps, groupOption.URL, uint(groupOption.Interval), groupOption.Lazy)
pd, err := provider.NewCompatibleProvider(groupName, ps, hc)
if err != nil {
return nil, fmt.Errorf("%s: %w", groupName, err)
}
providers = append(providers, pd)
providersMap[groupName] = pd
}
}
if len(groupOption.Use) != 0 {
list, err := getProviders(providersMap, groupOption.Use)
if err != nil {
return nil, fmt.Errorf("%s: %w", groupName, err)
}
if filterReg != nil {
pd := provider.NewFilterableProvider(groupName, list, filterReg)
providers = append(providers, pd)
} else {
providers = append(providers, list...)
}
}
var group C.ProxyAdapter
switch groupOption.Type {
case "url-test":
opts := parseURLTestOption(config)
group = NewURLTest(groupOption, providers, opts...)
case "select":
group = NewSelector(groupOption, providers)
case "fallback":
group = NewFallback(groupOption, providers)
case "load-balance":
strategy := parseStrategy(config)
return NewLoadBalance(groupOption, providers, strategy)
case "relay":
group = NewRelay(groupOption, providers)
default:
return nil, fmt.Errorf("%s %w: %s", groupName, errType, groupOption.Type)
}
return group, nil
}
func getProxies(mapping map[string]C.Proxy, list []string) ([]C.Proxy, error) {
var ps []C.Proxy
for _, name := range list {
p, ok := mapping[name]
if !ok {
return nil, fmt.Errorf("'%s' not found", name)
}
ps = append(ps, p)
}
return ps, nil
}
func getProviders(mapping map[string]types.ProxyProvider, list []string) ([]types.ProxyProvider, error) {
var ps []types.ProxyProvider
for _, name := range list {
p, ok := mapping[name]
if !ok {
return nil, fmt.Errorf("'%s' not found", name)
}
if p.VehicleType() == types.Compatible {
return nil, fmt.Errorf("proxy group %s can't contains in `use`", name)
}
ps = append(ps, p)
}
return ps, nil
}