grunt-connect-proxy

Provides a http proxy as middleware for the grunt-contrib-connect plugin.

Getting Started

This plugin requires Grunt ~0.4.1

If you haven't used Grunt before, be sure to check out the Getting Started guide, as it explains how to create a Gruntfile as well as install and use Grunt plugins. Once you're familiar with that process, you may install this plugin with this command:

npm install grunt-connect-proxy --save-dev

One the plugin has been installed, it may be enabled inside your Gruntfile with this line of JavaScript:

grunt.loadNpmTasks('grunt-connect-proxy');

Adapting the "connect" task

Overview

Proxy Configuration

In your project's Gruntfile, add a section named proxies to your existing connect definition.

grunt.initConfig({
    connect: {
        server: {
            options: {
                port: 9000,
                hostname: 'localhost'
            },
            proxies: [
                {
                    context: '/cortex',
                    host: '10.10.2.202',
                    port: 8080,
                    https: false,
                    changeOrigin: false,
                    xforward: false,
                    headers: {
                        "x-custom-added-header": value
                    }
                }
            ]
        }
    }
})

Adding the middleware

With Livereload

Add the middleware call from the connect option middleware hook

        connect: {
            livereload: {
                options: {
                    middleware: function (connect, options) {
                        var middlewares = [];
                        var directory = options.directory || options.base[options.base.length - 1];
                        if (!Array.isArray(options.base)) {
                            options.base = [options.base];
                        }
                                     // Setup the proxy
                                     middlewares.push(require('grunt-connect-proxy/lib/utils').proxyRequest);

                        options.base.forEach(function(base) {
                            // Serve static files.
                            middlewares.push(connect.static(base));
                        });

                        // Make directory browse-able.
                        middlewares.push(connect.directory(directory));

                        return middlewares;
                    }
                }
            }
        }

Without Livereload

It is possible to add the proxy middleware without Livereload as follows:

   // server
    connect: {
      server: {
        options: {
          port: 8000,
          base: 'public',
          logger: 'dev',
          hostname: 'localhost',
          middleware: function (connect, options) {
             var proxy = require('grunt-connect-proxy/lib/utils').proxyRequest;
             return [
                // Include the proxy first
                proxy,
                // Serve static files.
                connect.static(options.base),
                // Make empty directories browsable.
                connect.directory(options.base)
             ];
          }
        },
        proxies: [ /* as defined above */ ]
      }
  }

Adding the configureProxy task to the server task

For the server task, add the configureProxies task before the connect task

    grunt.registerTask('server', function (target) {
        grunt.task.run([
            'clean:server',
            'compass:server',
            'configureProxies:server',
            'livereload-start',
            'connect:livereload',
            'open',
            'watch'
        ]);
    });

IMPORTANT: You must specify the connect target in the configureProxies task.

Options

The available configuration options from a given proxy are generally the same as what is provided by the underlying httpproxy library

options.context

Type: String or Array

The context(s) to match requests against. Matching requests will be proxied. Should start with /. Should not end with / Multiple contexts can be matched for the same proxy rule via an array such as: context: ['/api', 'otherapi']

options.host

Type: String

The host to proxy to. Should not start with the http/https protocol.

options.port

Type: Number Default: 80

The port to proxy to.

options.https

Type: Boolean Default: false

Whether to proxy with https

options.changeOrigin

Type: Boolean Default: false

Whether to change the origin on the request to the proxy, or keep the original origin.

options.rejectUnauthorized:

Type: Boolean Default: false

Whether to reject self-signed certificates when https: true is set. Defaults to accept self-signed certs since proxy is meant for development environments.

options.xforward:

Type: Boolean Default: false

Whether to add x-forward headers to the proxy request, such as "x-forwarded-for": "127.0.0.1", "x-forwarded-port": 50892, "x-forwarded-proto": "http"

options.appendProxies

Type: Boolean Default: true

Set to false to isolate multi-task configuration proxy options from parent level instead of appending them.

options.rewrite

Type: Object

Allows rewrites of url (including context) when proxying. The object's keys serve as the regex used in the replacement operation. As an example the following proxy configuration will remove the context when proxying:

proxies: [
    context: '/context',
    host: 'host',
    port: 8080,
    rewrite: {
        '^/removingcontext': '',
        '^/changingcontext': '/anothercontext'
    }
]

options.timeout

Type: Number

The connection timeout in milliseconds. The default timeout is 2 minutes (120000 ms).

options.headers

Type: Object

A map of headers to be added to proxied requests.

options.ws

Type: Boolean Default: false

Set to true to proxy websockets.

Contributing

In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using Grunt.

Multi-server proxy configuration

grunt-contrib-connect multi-server configuration is supported. You can define proxies blocks in per-server options and refer to those blocks in task invocation.

grunt.initConfig({
    connect: {
            options: {
                port: 9000,
                hostname: 'localhost'
            },
            server2: {
                proxies: [
                    {
                        context: '/cortex',
                        host: '10.10.2.202',
                        port: 8080,
                        https: false,
                        changeOrigin: false
                    }
                ]
            },
            server3: {
                appendProxies: false,
                proxies: [
                    {
                        context: '/api',
                        host: 'example.org'
                    }
                ]
            }
        }
})

grunt.registerTask('e2etest', function (target) {
    grunt.task.run([
        'configureProxies:server2',
        'open',
        'karma'
    ]);
});

Release History

• 0.1.0 Initial release
• 0.1.1 Fix changeOrigin
• 0.1.2 Support multiple server definitions, bumped to grunt 0.4.1 (thanks to @lauripiispanen)
• 0.1.3 Bumped http-proxy dependency to 0.10.2
• 0.1.4 Added proxy rewrite support (thanks to @slawrence)
• 0.1.5 Default rejectUnauthorized to false to allow self-signed certificates over SSL
• 0.1.6 Add xforward option, added support for context arrays, added debug logging
• 0.1.7 Added WebSocket support (thanks for @killfill), Headers support (thanks to @gadr), various docs fixed