如何使用带有签名 url 的 gcs-resumable-upload

我希望能够使用 Node.js 客户端应用程序对 Google Cloud Storage 进行可恢复上传gcs 可续传上传包，连​​同签名网址（因为客户端应用程序是由未经身份验证的用户调用的）。

我的服务器通过调用生成签名网址获取签名网址 with {action: 'resumable'}。然后，服务器将 POST 发送到带有标头的签名 url{ 'x-goog-resumable': 'start' }和一个空的主体，并收到一个响应location标题看起来像下面这样：

https://storage.googleapis.com/<bucket_name/<file_path>?GoogleAccessId=<service_account>&Expires=<expiry_time>&Signature=<signature>&upload_id=<upload_id>

我的问题是：如果我退回上述内容location标头到我的客户端，客户端可以使用它来执行可恢复上传吗gcs 可续传上传，如果是这样，具体是怎样的？如果有人有一个例子，将不胜感激！

如果你使用的是java那么。

根据谷歌文档here很清楚如何创建签名 URL 以将对象上传到存储桶。

但是您需要为可恢复上传添加额外的标头（“x-goog-resumable：start”）。文档中没有提到这一点。

import com.google.auth.oauth2.GoogleCredentials;
import com.google.auth.oauth2.ServiceAccountCredentials;
import com.google.cloud.storage.*;

import java.io.*;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

public class GenerateV4PutObjectSignedUrl {

    public static void generateV4GPutObjectSignedUrl(
            String projectId, String bucketName, String objectName) throws StorageException, IOException {
        File initialFile = new File("src/main/java/credentials.json");
        InputStream serviceAccountJson = new FileInputStream(initialFile);

        ServiceAccountCredentials credentials = (ServiceAccountCredentials)
                GoogleCredentials.fromStream(serviceAccountJson);
        Storage storage = StorageOptions.newBuilder().setProjectId(projectId).setCredentials(credentials).build().getService();

        // Define Resource
        BlobInfo blobInfo = BlobInfo.newBuilder(BlobId.of(bucketName, objectName)).build();

        // Generate Signed URL
        Map<String, String> header = new HashMap<>();
        header.put("x-goog-resumable", "start");

        URL url =
                storage.signUrl(
                        blobInfo,
                        15,
                        TimeUnit.MINUTES,
                        Storage.SignUrlOption.httpMethod(HttpMethod.POST),
                        Storage.SignUrlOption.withExtHeaders(header),
                        Storage.SignUrlOption.withV4Signature());


        System.out.println("Generated PUT signed URL:");
        System.out.println(url);
    }

    public static void main(String[] args) throws IOException {
        generateV4GPutObjectSignedUrl("projectId", "bucketName", "objectName");
    }
}

Use the generated URL to make a POST call. I used cURL for the request.
The response would something like this.

Host: storage.googleapis.com
> User-Agent: curl/7.54.0
> Accept: */*
> x-goog-resumable: start
>

< HTTP/2 201
< content-type: text/plain; charset=utf-8
< x-guploader-uploadid: some-id
< location: session URL for actual resumable upload
< content-length: 0
< date: Mon, 07 Sep 2020 12:18:00 GMT
< server: UploadServer

现在使用该位置进行 PUT 调用来上传对象。有关中断时使用哪些标头的更多信息，请参阅link