Image Upload Adapter

MyUploadAdapter.ts

import { ClassicEditor } from '@ckeditor/ckeditor5-editor-classic';

import {
  FileLoader,
  UploadResponse,
} from '@ckeditor/ckeditor5-upload/src/filerepository';

// Image Upload
export default class MyUploadAdapter {
  loader: FileLoader;
  xhr: any;
  // ...
  constructor(loader: FileLoader) {
    // The file loader instance to use during the upload. It sounds scary but do not
    // worry — the loader will be passed into the adapter later on in this guide.
    this.loader = loader;
  }
  // Starts the upload process.
  upload(): Promise<UploadResponse> {
    console.log('Upload was at least hit. Therefore upload adapter works');
    return this.loader?.file.then(
      (file: any) =>
        new Promise((resolve, reject) => {
          this._initRequest();
          this._initListeners(resolve, reject, file);
          this._sendRequest(file);
        })
    );
  }

  // Aborts the upload process.
  abort() {
    if (this.xhr) {
      this.xhr.abort();
    }
  }
  _initRequest() {
    console.log('Request was initiated');
    const xhr = (this.xhr = new XMLHttpRequest());

    // Note that your request may look different. It is up to you and your editor
    // integration to choose the right communication channel. This example uses
    // a POST request with JSON as a data structure but your configuration
    // could be different.
    xhr.open('POST', 'api/image/upload', true);
    xhr.responseType = 'json';
  }
  // Initializes XMLHttpRequest listeners.
  _initListeners(resolve: any, reject: any, file: File) {
    const xhr = this.xhr;
    const loader = this.loader;
    const genericErrorText = `Couldn't upload file: ${file.name}.`;

    xhr.addEventListener('error', () => reject(genericErrorText));
    xhr.addEventListener('abort', () => reject());
    xhr.addEventListener('load', () => {
      const response = xhr.response;
      console.log('response: ' + JSON.stringify(response));

      // This example assumes the XHR server's "response" object will come with
      // an "error" which has its own "message" that can be passed to reject()
      // in the upload promise.
      //
      // Your integration may handle upload errors in a different way so make sure
      // it is done properly. The reject() function must be called when the upload fails.
      if (!response || response.error) {
        return reject(
          response && response.error ? response.error.message : genericErrorText
        );
      }

      // If the upload is successful, resolve the upload promise with an object containing
      // at least the "default" URL, pointing to the image on the server.
      // This URL will be used to display the image in the content. Learn more in the
      // UploadAdapter#upload documentation.
      resolve({
        default: response.url,
      });
    });

    // Upload progress when it is supported. The file loader has the #uploadTotal and #uploaded
    // properties which are used e.g. to display the upload progress bar in the editor
    // user interface.
    if (xhr.upload) {
      console.log('Progress event', xhr);
      xhr.upload.addEventListener('progress', (evt: ProgressEvent) => {
        if (evt.lengthComputable) {
          loader.uploadTotal = evt.total;
          loader.uploaded = evt.loaded;
        }
      });
    }
  }

  // Prepares the data and sends the request.
  _sendRequest(file: File) {
    console.log('Send file request', file);
    // Prepare the form data.
    const data = new FormData();

    data.append('upload', file);
    console.log(data);

    // Important note: This is the right place to implement security mechanisms
    // like authentication and CSRF protection. For instance, you can use
    // XMLHttpRequest.setRequestHeader() to set the request headers containing
    // the CSRF token generated earlier by your application.

    // Send the request.
    this.xhr.send(data);
  }

  // ...
}
// Upload ADAPTOR
export function MyCustomUploadAdapterPlugin(editor: any) {
  editor.plugins.get('FileRepository').createUploadAdapter = (
    loader: FileLoader
  ) => {
    // Configure the URL to the upload script in your back-end here!
    return new MyUploadAdapter(loader);
  };
}