chore: migrate to gitea

vendor/golang.org/x/oauth2/google/externalaccount/urlcredsource.go

@@ -0,0 +1,78 @@
+// Copyright 2020 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package externalaccount
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+
+	"golang.org/x/oauth2"
+)
+
+type urlCredentialSource struct {
+	URL     string
+	Headers map[string]string
+	Format  Format
+	ctx     context.Context
+}
+
+func (cs urlCredentialSource) credentialSourceType() string {
+	return "url"
+}
+
+func (cs urlCredentialSource) subjectToken() (string, error) {
+	client := oauth2.NewClient(cs.ctx, nil)
+	req, err := http.NewRequest("GET", cs.URL, nil)
+	if err != nil {
+		return "", fmt.Errorf("oauth2/google/externalaccount: HTTP request for URL-sourced credential failed: %v", err)
+	}
+	req = req.WithContext(cs.ctx)
+
+	for key, val := range cs.Headers {
+		req.Header.Add(key, val)
+	}
+	resp, err := client.Do(req)
+	if err != nil {
+		return "", fmt.Errorf("oauth2/google/externalaccount: invalid response when retrieving subject token: %v", err)
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(io.LimitReader(resp.Body, 1<<20))
+	if err != nil {
+		return "", fmt.Errorf("oauth2/google/externalaccount: invalid body in subject token URL query: %v", err)
+	}
+	if c := resp.StatusCode; c < 200 || c > 299 {
+		return "", fmt.Errorf("oauth2/google/externalaccount: status code %d: %s", c, respBody)
+	}
+
+	switch cs.Format.Type {
+	case "json":
+		jsonData := make(map[string]any)
+		err = json.Unmarshal(respBody, &jsonData)
+		if err != nil {
+			return "", fmt.Errorf("oauth2/google/externalaccount: failed to unmarshal subject token file: %v", err)
+		}
+		val, ok := jsonData[cs.Format.SubjectTokenFieldName]
+		if !ok {
+			return "", errors.New("oauth2/google/externalaccount: provided subject_token_field_name not found in credentials")
+		}
+		token, ok := val.(string)
+		if !ok {
+			return "", errors.New("oauth2/google/externalaccount: improperly formatted subject token")
+		}
+		return token, nil
+	case "text":
+		return string(respBody), nil
+	case "":
+		return string(respBody), nil
+	default:
+		return "", errors.New("oauth2/google/externalaccount: invalid credential_source file format type")
+	}
+
+}