Save document to AWS S3

9 Jan 20247 minutes to read

To save a document to AWS S3, you can follow the steps below

Step 1: Create a Simple Document Editor sample in Angular

Follow the instructions provided in this link to create a simple Document Editor sample in Angular. This will give you a basic setup of the Document Editor component.

Step 2: Modify the DocumentEditorController.cs File in the Web Service Project

• Create a web service project in .NET Core 3.0 or above. You can refer to this link for instructions on how to create a web service project.

• Open the DocumentEditorController.cs file in your web service project.

• Import the required namespaces at the top of the file:

using System.IO;
using Amazon;
using Amazon.S3;
using Amazon.S3.Model;

• Add the following private fields and constructor parameters to the DocumentEditorController class, In the constructor, assign the values from the configuration to the corresponding fields

private IConfiguration _configuration;
public readonly string _accessKey;
public readonly string _secretKey;
public readonly string _bucketName;

public DocumentEditorController(IWebHostEnvironment hostingEnvironment, IMemoryCache cache, IConfiguration configuration)
{
  _hostingEnvironment = hostingEnvironment;
  _cache = cache;
  _configuration = configuration;
  _accessKey = _configuration.GetValue<string>("AccessKey");
  _secretKey = _configuration.GetValue<string>("SecretKey");
  _bucketName = _configuration.GetValue<string>("BucketName");
}

• Create the SaveToS3() method to save the document to AWS S3 bucket

[AcceptVerbs("Post")]
[HttpPost]
[EnableCors("AllowAllOrigins")]
[Route("SaveToS3")]
//Post action for save the document to AWS S3

public void SaveToS3(IFormCollection data)
{
  if (data.Files.Count == 0)
    return;
  RegionEndpoint bucketRegion = RegionEndpoint.USEast1;
  // Configure the AWS SDK with your access credentials and other settings
  var s3Client = new AmazonS3Client(_accessKey, _secretKey, bucketRegion);
  string bucketName = _bucketName;
  IFormFile file = data.Files[0];
  string documentName = this.GetValue(data, "documentName");
  string result = Path.GetFileNameWithoutExtension(documentName);
  Stream stream = new MemoryStream();
  file.CopyTo(stream);
  var request = new PutObjectRequest
  {
    BucketName = bucketName,
    Key = result + "_downloaded.docx",
    InputStream = stream,
  };
  // Upload the document to AWS S3
  var response = s3Client.PutObjectAsync(request).Result;
}

private string GetValue(IFormCollection data, string key)
{
    if (data.ContainsKey(key))
    {
        string[] values = data[key];
        if (values.Length > 0)
        {
            return values[0];
        }
    }
    return "";
}

• Open the appsettings.json file in your web service project, Add the following lines below the existing "AllowedHosts" configuration

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "AllowedHosts": "*",
  "AccessKey": "Your Access Key from AWS S3",
  "SecretKey": "Your Secret Key from AWS S3",
  "BucketName": "Your Bucket name from AWS S3"
}

Replace Your Access Key from AWS S3, Your Secret Key from AWS S3, and Your Bucket name from AWS S3 with your actual AWS access key, secret key and bucket name

Step 3: Modify the index File in the Document Editor sample

In the client-side, to export the document into blob the document using saveAsBlob and sent to server-side for saving in AWS S3 Bucket.

import { Component, OnInit, ViewChild } from '@angular/core';
import {
  DocumentEditorContainerComponent,
  ToolbarService,
} from '@syncfusion/ej2-angular-documenteditor';
@Component({
      selector: 'app-root',
      // specifies the template string for the DocumentEditorContainer component
      template: `<button ejs-button (click)="save()" >Save Document To AWS S3</button><ejs-documenteditorcontainer #documenteditor_default serviceUrl="http://localhost:62870/api/documenteditor/" height="600px" style="display:block" (created)="onCreate()" [enableToolbar]=true> </ejs-documenteditorcontainer>`,
      providers: [ToolbarService],
})
export class AppComponent implements OnInit {
  @ViewChild('documenteditor_default')
  public container: DocumentEditorContainerComponent;
  ngOnInit(): void {}

   public save(): void {
        //Export the document as Blob object.
        this.container.documentEditor.saveAsBlob('Docx').then((exportedDocument: Blob) => {
          //Now, save the document where ever you want.
          let formData: FormData = new FormData();
          formData.append('documentName', this.container.documentEditor.documentName);
          formData.append('file', exportedDocument);
          /* tslint:disable */
          let req = new XMLHttpRequest();
          // Replace your running Url here
          req.open(
              'POST',
              'http://localhost:62870/api/documenteditor/SaveToS3',
              true
          );
          req.onreadystatechange = () => {
              if (req.readyState === 4) {
                  if (req.status === 200 || req.status === 304) {
                      console.log('Saved sucessfully');
                  }
              }
          };
          req.send(formData);
        });
    }
}

The AWSSDK.S3 NuGet package must be installed in your application to use the previous code example.