angel_proxy 2.1.2

proxy #

Pub build status

Angel middleware to forward requests to another server (i.e. webdev serve). Also supports WebSockets.

import 'package:angel_proxy/angel_proxy.dart';
import 'package:http/http.dart' as http;

main() async {
  // ...
  var client = http.Client();
  // Forward requests instead of serving statically
  var proxy1 = Proxy(client, Uri.parse('http://localhost:3000'));
  // handle all methods (GET, POST, ...)

You can also restrict the proxy to serving only from a specific root:

Proxy(client, baseUrl, publicPath: '/remote');

Also, you can map requests to a root path on the remote server:

Proxy(client, baseUrl.replace(path: '/path'));

Request bodies will be forwarded as well, if they are not empty. This allows things like POST requests to function.

For a request body to be forwarded, the body must not have already been parsed.

2.1.2 #

  • Apply lints.

2.1.1 #

  • Update for framework@2.0.0-alpha.15

2.1.0 #

  • Use Uri instead of archaic host, port, and mapTo. Also cleaner + safer + easier.
  • Enable WebSocket proxying.

2.0.0 #

  • Updates for Angel 2. Big thanks to @denkuy!
  • Use package:path for better path resolution.

1.1.1 #

  • Removed reference to io; now works with HTTP/2. Thanks to @daniel-v!


import 'dart:io';
import 'package:angel_framework/angel_framework.dart';
import 'package:angel_framework/http.dart';
import 'package:angel_proxy/angel_proxy.dart';
import 'package:http/io_client.dart' as http;
import 'package:logging/logging.dart';

final Duration timeout = Duration(seconds: 5);

main() async {
  var app = Angel();
  var client = http.IOClient();

  // Forward any /api requests to pub.
  // By default, if the host throws a 404, the request will fall through to the next handler.
  var pubProxy = Proxy(
    publicPath: '/pub',
    timeout: timeout,
  app.all("/pub/*", pubProxy.handleRequest);

  // Surprise! We can also proxy WebSockets.
  // Play around with this at
  var echoProxy = Proxy(
    publicPath: '/echo',
    timeout: timeout,
  app.get('/echo', echoProxy.handleRequest);

  // Pub's HTML assumes that the site's styles, etc. are on the absolute path `/static`.
  // This is not the case here. Let's patch that up:
  app.get('/static/*', (RequestContext req, res) {
    return pubProxy.servePath(req.path, req, res);

  // Anything else should fall through to
  var dartlangProxy = Proxy(
    timeout: timeout,
    recoverFrom404: false,
  app.all('*', dartlangProxy.handleRequest);

  // In case we can't connect to, show an error.
      (req, res) => res.write('Couldn\'t connect to Pub or dartlang.'));

  app.logger = Logger('angel')
      (rec) {
        if (rec.error != null) print(rec.error);
        if (rec.stackTrace != null) print(rec.stackTrace);

  var server =
      await AngelHttp(app).startServer(InternetAddress.loopbackIPv4, 8080);
  print('Listening at http://${server.address.address}:${server.port}');
      'Check this out! http://${server.address.address}:${server.port}/pub/packages/angel_framework');

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  angel_proxy: ^2.1.2

2. Install it

You can install packages from the command line:

with pub:

$ pub get

with Flutter:

$ flutter pub get

Alternatively, your editor might support pub get or flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:angel_proxy/angel_proxy.dart';
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Learn more about scoring.

We analyzed this package on Jul 18, 2019, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.4.0
  • pana: 0.12.19


Detected platforms: Flutter, other

Primary library: package:angel_proxy/angel_proxy.dart with components: io.

Health suggestions

Fix lib/src/proxy_layer.dart. (-1.49 points)

Analysis of lib/src/proxy_layer.dart reported 3 hints:

line 36 col 7: DO use curly braces for all flow control structures.

line 39 col 7: DO use curly braces for all flow control structures.

line 41 col 7: DO use curly braces for all flow control structures.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.0.0 <3.0.0
angel_framework ^2.0.0-alpha 2.0.4
http ^0.12.0 0.12.0+2
http_parser ^3.0.0 3.1.3
path ^1.0.0 1.6.2
Transitive dependencies
angel_container 1.0.4
angel_http_exception 1.1.0
angel_model 1.0.3
angel_route 3.0.6
async 2.3.0
charcode 1.1.2
code_buffer 1.0.1
collection 1.14.11
combinator 1.1.0
convert 2.1.1
crypto 2.0.6
dart2_constant 1.0.2+dart2
file 5.0.8+1
http2 1.0.0
http_server 0.9.8+3
intl 0.15.8
matcher 0.12.5
merge_map 1.0.2
meta 1.1.7
mime 0.9.6+3
quiver 2.0.3
quiver_hashcode 2.0.0
source_span 1.5.5
stack_trace 1.9.3
string_scanner 1.0.4
term_glyph 1.1.0
tuple 1.0.2
typed_data 1.1.6
uuid 2.0.2
Dev dependencies
angel_test ^2.0.0-alpha
logging any 0.11.3+2
mock_request any 1.0.6
pedantic ^1.0.0 1.8.0+1
test ^1.0.0