我正在嘗試動態設置標題部分中的 x-goog-meta-reference，因此我想在函數簽名中傳遞一個名為 reference 的參數，并將其分配給標題中的 x-goog-meta-reference。請參閱x-goog-meta-reference下面的代碼示例。我關注了這個關于規范請求的鏈接。我的示例代碼來自這里，但它是我的產品代碼的編輯版本。func GenerateSignedURL(ctx context.Context, bucket string, key string, expiration time.Time,) (string, error) { gcsClient, err := storage.NewClient(ctx) if err != nil { return "", fmt.Errorf("storage.NewClient: %v", err) } defer gcsClient.Close() storage.SignedURL() opts := &storage.SignedURLOptions{ Scheme: storage.SigningSchemeV4, Method: "PUT", ContentType: "text/csv", Headers: []string{ "x-goog-meta-reference: xxx", // << I want xxx value to be whatever I pass to this function as an arg }, Expires: expiration, } url, err := gcsClient.Bucket(bucket).SignedURL(key, opts) if err != nil { log.WithContext(ctx).Warn("Failed to generate a GCS signed URL") return "", err } return url, nil}我嘗試查看一些示例，但它們都是 s3 并且我沒有遇到任何 gcp 示例代碼。但是，我確實發現了這個問題，但我自己無法弄清楚。
1 回答
慕工程0101907
TA貢獻1887條經驗 獲得超5個贊
正如@dazwilkin提到的那樣，fmt.Sprintf對于這種情況來說已經足夠了，但是您也可以使用我從mozilla移植的這個庫
import (
"context"
"fmt"
"time"
"cloud.google.com/go/storage"
"github.com/dkbyo/go-stringhttpheader"
)
type Headers struct {
GoogleMetaReference string `header:"x-goog-meta-reference"`
}
func GenerateSignedURL(bucket string, key string, expiration time.Time,
) (string, error) {
ctx := context.Background()
gcsClient, err := storage.NewClient(ctx)
if err != nil {
return "", fmt.Errorf("storage.NewClient: %v", err)
}
defer gcsClient.Close()
headers := Headers{
GoogleMetaReference: "xxx",
}
fmt.Print(stringhttpheader.Encode(headers))
stringheaders, _ := stringhttpheader.Encode(headers)
//storage.SignedURL()
opts := &storage.SignedURLOptions{
Scheme: storage.SigningSchemeV4,
Method: "PUT",
ContentType: "text/csv",
Headers: stringheaders,
Expires: expiration,
}
url, err := gcsClient.Bucket(bucket).SignedURL(key, opts)
if err != nil {
log.WithContext(ctx).Warn("Failed to generate a GCS signed URL")
return "", err
}
return url, nil
}
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