github.com/xtls/xray-core@v1.8.12-0.20240518155711-3168d27b0bdb/main/confloader/external/external.go (about)

     1  package external
     2  
     3  //go:generate go run github.com/xtls/xray-core/common/errors/errorgen
     4  
     5  import (
     6  	"bytes"
     7  	"io"
     8  	"net/http"
     9  	"net/url"
    10  	"os"
    11  	"strings"
    12  	"time"
    13  
    14  	"github.com/xtls/xray-core/common/buf"
    15  	"github.com/xtls/xray-core/common/platform/ctlcmd"
    16  	"github.com/xtls/xray-core/main/confloader"
    17  )
    18  
    19  func ConfigLoader(arg string) (out io.Reader, err error) {
    20  	var data []byte
    21  	switch {
    22  	case strings.HasPrefix(arg, "http://"), strings.HasPrefix(arg, "https://"):
    23  		data, err = FetchHTTPContent(arg)
    24  
    25  	case arg == "stdin:":
    26  		data, err = io.ReadAll(os.Stdin)
    27  
    28  	default:
    29  		data, err = os.ReadFile(arg)
    30  	}
    31  
    32  	if err != nil {
    33  		return
    34  	}
    35  	out = bytes.NewBuffer(data)
    36  	return
    37  }
    38  
    39  func FetchHTTPContent(target string) ([]byte, error) {
    40  	parsedTarget, err := url.Parse(target)
    41  	if err != nil {
    42  		return nil, newError("invalid URL: ", target).Base(err)
    43  	}
    44  
    45  	if s := strings.ToLower(parsedTarget.Scheme); s != "http" && s != "https" {
    46  		return nil, newError("invalid scheme: ", parsedTarget.Scheme)
    47  	}
    48  
    49  	client := &http.Client{
    50  		Timeout: 30 * time.Second,
    51  	}
    52  	resp, err := client.Do(&http.Request{
    53  		Method: "GET",
    54  		URL:    parsedTarget,
    55  		Close:  true,
    56  	})
    57  	if err != nil {
    58  		return nil, newError("failed to dial to ", target).Base(err)
    59  	}
    60  	defer resp.Body.Close()
    61  
    62  	if resp.StatusCode != 200 {
    63  		return nil, newError("unexpected HTTP status code: ", resp.StatusCode)
    64  	}
    65  
    66  	content, err := buf.ReadAllToBytes(resp.Body)
    67  	if err != nil {
    68  		return nil, newError("failed to read HTTP response").Base(err)
    69  	}
    70  
    71  	return content, nil
    72  }
    73  
    74  func ExtConfigLoader(files []string, reader io.Reader) (io.Reader, error) {
    75  	buf, err := ctlcmd.Run(append([]string{"convert"}, files...), reader)
    76  	if err != nil {
    77  		return nil, err
    78  	}
    79  
    80  	return strings.NewReader(buf.String()), nil
    81  }
    82  
    83  func init() {
    84  	confloader.EffectiveConfigFileLoader = ConfigLoader
    85  	confloader.EffectiveExtConfigLoader = ExtConfigLoader
    86  }