planning

node_modules/geotiff/dist-module/source/client/xhr.js

@@ -0,0 +1,61 @@
+import { BaseClient, BaseResponse } from './base.js';
+import { AbortError } from '../../utils.js';
+
+class XHRResponse extends BaseResponse {
+  /**
+   * BaseResponse facade for XMLHttpRequest
+   * @param {XMLHttpRequest} xhr
+   * @param {ArrayBuffer} data
+   */
+  constructor(xhr, data) {
+    super();
+    this.xhr = xhr;
+    this.data = data;
+  }
+
+  get status() {
+    return this.xhr.status;
+  }
+
+  getHeader(name) {
+    return this.xhr.getResponseHeader(name);
+  }
+
+  async getData() {
+    return this.data;
+  }
+}
+
+export class XHRClient extends BaseClient {
+  constructRequest(headers, signal) {
+    return new Promise((resolve, reject) => {
+      const xhr = new XMLHttpRequest();
+      xhr.open('GET', this.url);
+      xhr.responseType = 'arraybuffer';
+      for (const [key, value] of Object.entries(headers)) {
+        xhr.setRequestHeader(key, value);
+      }
+
+      // hook signals
+      xhr.onload = () => {
+        const data = xhr.response;
+        resolve(new XHRResponse(xhr, data));
+      };
+      xhr.onerror = reject;
+      xhr.onabort = () => reject(new AbortError('Request aborted'));
+      xhr.send();
+
+      if (signal) {
+        if (signal.aborted) {
+          xhr.abort();
+        }
+        signal.addEventListener('abort', () => xhr.abort());
+      }
+    });
+  }
+
+  async request({ headers, signal } = {}) {
+    const response = await this.constructRequest(headers, signal);
+    return response;
+  }
+}