add proxy support for browser provider

Author: Ali Sadeghi

README.md

@@ -52,7 +52,7 @@ The process goes something like this:
   * [Akamai](pkg/provider/akamai/README.md)
   * OneLogin
   * NetIQ
-  * Browser, this uses [playwright-go](github.com/mxschmitt/playwright-go) to run a sandbox chromium window.
+  * Browser, this uses [playwright-go](https://github.com/mxschmitt/playwright-go) to run a sandbox chromium window. Using ALL_PROXY environment variable you can set a proxy. HTTP and SOCKS proxies are supported, for example `http://myproxy.com:3128` or `socks5://myproxy.com:3128`. Short form `myproxy.com:3128` is considered an HTTP proxy.
   * [Auth0](pkg/provider/auth0/README.md) NOTE: Currently, MFA not supported
 * AWS SAML Provider configured
 

pkg/provider/browser/browser.go

@@ -3,6 +3,7 @@ package browser
 import (
 	"errors"
 	"net/url"
+	"os"
 
 	"github.com/mxschmitt/playwright-go"
 	"github.com/sirupsen/logrus"
@@ -31,6 +32,7 @@ func (cl *Client) Authenticate(loginDetails *creds.LoginDetails) (string, error)
 	// TODO: provide some overrides for this window
 	launchOptions := playwright.BrowserTypeLaunchOptions{
 		Headless: playwright.Bool(false),
+		Proxy:    GetProxy("ALL_PROXY"),
 	}
 
 	// currently using Chromium as it is widely supported for Identity providers
@@ -83,3 +85,10 @@ func (cl *Client) Validate(loginDetails *creds.LoginDetails) error {
 
 	return nil
 }
+
+func GetProxy(envVar string) *playwright.BrowserTypeLaunchOptionsProxy {
+	if value, ok := os.LookupEnv(envVar); ok {
+		return &playwright.BrowserTypeLaunchOptionsProxy{Server: playwright.String(value)}
+	}
+	return nil
+}