带有预签名 url 的 S3 文件上传返回状态（已取消）

Question

我正在尝试使用 Angular 客户端将文件上传到 Amazon S3。我使用 NodeJs 应用程序服务器生成了预签名 URL。将文件上传到预签名 URL，但无法从客户端上传文件，获取（取消）。

我尝试上传以下格式的文件：buffer、base64、formData 和原始 File

如果我尝试使用邮递员将二进制形式上传到生成的 URL，这将有效

使用 NodeJs

生成 Presigned URL

      const s3 = new AWS.S3({
         accessKeyId: AWS_ACCESS_KEY,
         secretAccessKey: AWS_SECRET_ACCESS_KEY,
         region: 'eu-central-1',
      });
      const signedUrlExpireSeconds = 60 * 5;
      const presignedS3Url = s3.getSignedUrl('putObject', {
         Bucket: process.env.bucket,
         Key: './test3Public.pdf',
         Expires: signedUrlExpireSeconds,
         ACL: 'public-read',
         ContentType: 'application/pdf',
      });

HTML

<input
      type="file"
      (change)="onFileSelected($event)"
      accept="application/pdf, .docx"
   />

组件.ts

onFileSelected(event: any) {
      this.fileToUpload = <File>event.target.files[0];
     
      this.fileUpload
         .generatePresignedURL(this.fileToUpload.name)
         .pipe(first())
         .subscribe(
            (data) => {
               this.fileUpload
                  .uploadfileAWSS3(this.fileToUpload, data.presignedS3Url)
                  .pipe(first())
                  .subscribe(
                     (data) => {
                        console.log('uploaded', data);
                     },
                     (error) => {
                        console.log('error', error);
                     }
                  );
            },
            (error) => {
               console.log('error', error);
            }
         );
   }

我发送文件的格式：

Angular 11 服务

 uploadfileAWSS3(file, fileuploadurl) {
      const req = new HttpRequest('PUT', fileuploadurl, file);
      return this.http.request(req);
   }

您能帮我解决上传被取消的问题吗？

Answer 1

HTML：

    <input type="file" (change)="onFileSelected($event)" accept="application/pdf, .docx"
    />

角度代码：

  onFileSelected(event) {
    const fileToUpload = <File>event.target.files[0];
    const bucketParms = {
      Bucket: "sample-temp-bucket",
      Key: fileToUpload.name,
      ContentType: "application/pdf",
      ACL: "public-read",
      Expires: 3600,
    };
    s3.getSignedUrl("putObject", bucketParms, (error, url) => {
      if (error) console.log("error", error);
      if (url) {
        this.http.put(url, fileToUpload).subscribe((response) => {
          console.log("response receved is ", response);
        });
      }
    });
  }

CORS：

[
    {
        "AllowedHeaders": [
            "*"
        ],
        "AllowedMethods": [
            "PUT",
            "POST"
        ],
        "AllowedOrigins": [
            "http://localhost:4200"
        ],
        "ExposeHeaders": []
    }
]