Xray-core/main/commands/all/api/shared.go
yuhan6665 fa5d7a255b
Least load balancer (#2999)
* v5: Health Check & LeastLoad Strategy (rebased from 2c5a71490368500a982018a74a6d519c7e121816)

Some changes will be necessary to integrate it into V2Ray

* Update proto

* parse duration conf with time.Parse()

* moving health ping to observatory as a standalone component

* moving health ping to observatory as a standalone component: auto generated file

* add initialization for health ping

* incorporate changes in router implementation

* support principle target output

* add v4 json support for BurstObservatory & fix balancer reference

* update API command

* remove cancelled API

* return zero length value when observer is not found

* remove duplicated targeted dispatch

* adjust test with updated structure

* bug fix for observer

* fix strategy selector

* fix strategy least load

* Fix ticker usage

ticker.Close does not close ticker.C

* feat: Replace default Health Ping URL to HTTPS (#1991)

* fix selectLeastLoad() returns wrong number of nodes (#2083)

* Test: fix leastload strategy unit test

* fix(router): panic caused by concurrent map read and write (#2678)

* Clean up code

---------

Co-authored-by: Jebbs <qjebbs@gmail.com>
Co-authored-by: Shelikhoo <xiaokangwang@outlook.com>
Co-authored-by: 世界 <i@sekai.icu>
Co-authored-by: Bernd Eichelberger <46166740+4-FLOSS-Free-Libre-Open-Source-Software@users.noreply.github.com>
Co-authored-by: 秋のかえで <autmaple@protonmail.com>
Co-authored-by: Rinka <kujourinka@gmail.com>
2024-02-17 22:51:37 -05:00

131 lines
3 KiB
Go

package api
import (
"bytes"
"context"
"fmt"
"google.golang.org/protobuf/encoding/protojson"
"io"
"net/http"
"net/url"
"os"
"reflect"
"strings"
"time"
"github.com/xtls/xray-core/common/buf"
"github.com/xtls/xray-core/main/commands/base"
"google.golang.org/grpc"
"google.golang.org/protobuf/proto"
)
type serviceHandler func(ctx context.Context, conn *grpc.ClientConn, cmd *base.Command, args []string) string
var (
apiServerAddrPtr string
apiTimeout int
apiJSON bool
)
func setSharedFlags(cmd *base.Command) {
cmd.Flag.StringVar(&apiServerAddrPtr, "s", "127.0.0.1:8080", "")
cmd.Flag.StringVar(&apiServerAddrPtr, "server", "127.0.0.1:8080", "")
cmd.Flag.IntVar(&apiTimeout, "t", 3, "")
cmd.Flag.IntVar(&apiTimeout, "timeout", 3, "")
cmd.Flag.BoolVar(&apiJSON, "json", false, "")
}
func dialAPIServer() (conn *grpc.ClientConn, ctx context.Context, close func()) {
ctx, cancel := context.WithTimeout(context.Background(), time.Duration(apiTimeout)*time.Second)
conn, err := grpc.DialContext(ctx, apiServerAddrPtr, grpc.WithInsecure(), grpc.WithBlock())
if err != nil {
base.Fatalf("failed to dial %s", apiServerAddrPtr)
}
close = func() {
cancel()
conn.Close()
}
return
}
// loadArg loads one arg, maybe an remote url, or local file path
func loadArg(arg string) (out io.Reader, err error) {
var data []byte
switch {
case strings.HasPrefix(arg, "http://"), strings.HasPrefix(arg, "https://"):
data, err = fetchHTTPContent(arg)
case arg == "stdin:":
data, err = io.ReadAll(os.Stdin)
default:
data, err = os.ReadFile(arg)
}
if err != nil {
return
}
out = bytes.NewBuffer(data)
return
}
// fetchHTTPContent dials https for remote content
func fetchHTTPContent(target string) ([]byte, error) {
parsedTarget, err := url.Parse(target)
if err != nil {
return nil, err
}
if s := strings.ToLower(parsedTarget.Scheme); s != "http" && s != "https" {
return nil, fmt.Errorf("invalid scheme: %s", parsedTarget.Scheme)
}
client := &http.Client{
Timeout: 30 * time.Second,
}
resp, err := client.Do(&http.Request{
Method: "GET",
URL: parsedTarget,
Close: true,
})
if err != nil {
return nil, fmt.Errorf("failed to dial to %s", target)
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
return nil, fmt.Errorf("unexpected HTTP status code: %d", resp.StatusCode)
}
content, err := buf.ReadAllToBytes(resp.Body)
if err != nil {
return nil, fmt.Errorf("failed to read HTTP response")
}
return content, nil
}
func protoToJSONString(m proto.Message, prefix, indent string) (string, error) {
return strings.TrimSpace(protojson.MarshalOptions{Indent: indent}.Format(m)), nil
}
func showJSONResponse(m proto.Message) {
if isNil(m) {
return
}
output, err := protoToJSONString(m, "", " ")
if err != nil {
fmt.Fprintf(os.Stdout, "%v\n", m)
base.Fatalf("error encode json: %s", err)
}
fmt.Println(output)
}
func isNil(i interface{}) bool {
vi := reflect.ValueOf(i)
if vi.Kind() == reflect.Ptr {
return vi.IsNil()
}
return i == nil
}