Add DontLaunchOnConnectFailure and refine server connection logic

Introduced the `DontLaunchOnConnectFailure` option to prevent browser launch on connection failure when connecting to a Playwright server. Enhanced environment variable handling for server address based on browser type, improving flexibility and reliability in connection scenarios.

playwright.go

@@ -59,6 +59,10 @@ type PlayWrightBrowserOptions struct {
 	// PlayWrightServerAddress is the address of a PlayWright server to connect to.
 	// Defaults to the value of the environment variable PLAYWRIGHT_SERVER_ADDRESS.
 	PlayWrightServerAddress string
+
+	// DontLaunchOnConnectFailure will, if set, not launch the browser if the connection to the PlayWright server,
+	// and return an error if the connection fails.
+	DontLaunchOnConnectFailure bool
 }
 
 func cookieToPlaywrightOptionalCookie(cookie Cookie) playwright.OptionalCookie {
@@ -90,7 +94,7 @@ func NewPlayWrightBrowser(opts ...PlayWrightBrowserOptions) (Browser, error) {
 		Browser:                 PlayWrightBrowserSelectionFirefox,
 		Timeout:                 &thirtySeconds,
 		DarkMode:                false,
-		PlayWrightServerAddress: os.Getenv("PLAYWRIGHT_SERVER_ADDRESS"),
+		PlayWrightServerAddress: "",
 	}
 
 	for _, o := range opts {
@@ -112,7 +116,9 @@ func NewPlayWrightBrowser(opts ...PlayWrightBrowserOptions) (Browser, error) {
 		if o.DarkMode {
 			opt.DarkMode = true
 		}
-
+		if o.PlayWrightServerAddress != "" {
+			opt.PlayWrightServerAddress = o.PlayWrightServerAddress
+		}
 		opt.ShowBrowser = o.ShowBrowser
 	}
 
@@ -137,24 +143,41 @@ func NewPlayWrightBrowser(opts ...PlayWrightBrowserOptions) (Browser, error) {
 	switch opt.Browser {
 	case PlayWrightBrowserSelectionChromium:
 		bt = pw.Chromium
+		if opt.PlayWrightServerAddress == "" {
+			opt.PlayWrightServerAddress = os.Getenv("PLAYWRIGHT_SERVER_ADDRESS_CHROMIUM")
+		}
 
 	case PlayWrightBrowserSelectionFirefox:
 		bt = pw.Firefox
+		if opt.PlayWrightServerAddress == "" {
+			opt.PlayWrightServerAddress = os.Getenv("PLAYWRIGHT_SERVER_ADDRESS_FIREFOX")
+		}
 
 	case PlayWrightBrowserSelectionWebKit:
 		bt = pw.WebKit
+		if opt.PlayWrightServerAddress == "" {
+			opt.PlayWrightServerAddress = os.Getenv("PLAYWRIGHT_SERVER_ADDRESS_WEBKIT")
+		}
 
 	default:
 		return nil, ErrInvalidBrowserSelection
 	}
 	var browser playwright.Browser
 
+	var launch = true
 	if opt.PlayWrightServerAddress != "" {
+		launch = false
 		browser, err = bt.Connect(opt.PlayWrightServerAddress, playwright.BrowserTypeConnectOptions{})
+
 		if err != nil {
-			return nil, err
+			if opt.DontLaunchOnConnectFailure {
+				return nil, err
+			}
+			launch = true
 		}
-	} else {
+	}
+
+	if launch {
 		browser, err = bt.Launch(playwright.BrowserTypeLaunchOptions{
 			Headless: playwright.Bool(!opt.ShowBrowser),
 		})