openHttp method

Future<void> openHttp({ String method = 'GET', required Uri uri, ContentType? contentType, void onRequest(HttpClientRequest request)?, void onResponse(HttpClientResponse response)?, })

Loads content using HTTP client.

Throws StateError if called inside a browser.

Example

import 'dart:io' show Cookie;
import 'package:universal_html/controller.dart';

Future main() async {
  // Load a document.
  final controller = WindowController();
  controller.defaultHttpClient.userAgent = 'My Hacker News client';
  await controller.openHttp(
    method: 'GET',
    uri: Uri.parse("https://news.ycombinator.com/"),
    onRequest: (HttpClientRequest request) {
      // Add custom headers
      request.headers.set('Authorization', 'headerValue');
      request.cookies.add(Cookie('cookieName', 'cookieValue'));
    },
    onResponse: (HttpClientResponse response) {
      print('Status code: ${response.statusCode}');
    },
  );

  // Select the top story using a CSS query
  final titleElements = controller.document.querySelectorAll(".athing > .title");
  final topStoryTitle = titleElements.first.text;

  // Print result
  print("Top Hacker News story is: $topStoryTitle");
}
}

Implementation

Future<void> openHttp({
  String method = 'GET',
  required Uri uri,
  ContentType? contentType,
  void Function(HttpClientRequest request)? onRequest,
  void Function(HttpClientResponse response)? onResponse,
}) async {
  if (isTopLevelWindowInsideBrowser) {
    throw StateError('Failed to mutate the main window inside a browser');
  }

  // Write HTTP request.
  final client = onChooseHttpClient(uri);
  final request = await client.openUrl(method, uri);
  if (onRequest != null) {
    onRequest(request);
  }
  if (contentType != null) {
    request.headers.contentType = contentType;
  }

  // Read HTTP response.
  final response = await request.close();
  final future = utf8.decodeStream(response);
  if (onResponse != null) {
    onResponse(response);
  }
  final content = await future;

  return openContent(content, contentType: response.headers.contentType);
}