示例#1
0
文件: webloop.go 项目: hyp530/webloop
// NewView creates a new View in the context.
func (c *Context) NewView() *View {
	view := make(chan *View, 1)
	glib.IdleAdd(func() bool {
		webView := webkit2.NewWebView()
		settings := webView.Settings()
		settings.SetEnableWriteConsoleMessagesToStdout(true)
		settings.SetUserAgentWithApplicationDetails("WebLoop", "v1")
		v := &View{WebView: webView}
		loadChangedHandler, _ := webView.Connect("load-changed", func(ctx *glib.CallbackContext) {
			loadEvent := webkit2.LoadEvent(ctx.Arg(0).Int())
			switch loadEvent {
			case webkit2.LoadFinished:
				// If we're here, then the load must not have failed, because
				// otherwise we would've disconnected this handler in the
				// load-failed signal handler.
				v.load <- struct{}{}
			}
		})
		webView.Connect("load-failed", func() {
			v.lastLoadErr = ErrLoadFailed
			webView.HandlerDisconnect(loadChangedHandler)
		})
		view <- v
		return false
	})
	return <-view
}
示例#2
0
func Example() {
	runtime.LockOSThread()
	gtk.Init(nil)

	webView := webkit2.NewWebView()
	defer webView.Destroy()

	webView.Connect("load-failed", func() {
		fmt.Println("Load failed.")
	})
	webView.Connect("load-changed", func(ctx *glib.CallbackContext) {
		loadEvent := webkit2.LoadEvent(ctx.Arg(0).Int())
		switch loadEvent {
		case webkit2.LoadFinished:
			fmt.Println("Load finished.")
			fmt.Printf("Title: %q\n", webView.Title())
			fmt.Printf("URI: %s\n", webView.URI())
			webView.RunJavaScript("window.location.hostname", func(val *gojs.Value, err error) {
				if err != nil {
					fmt.Println("JavaScript error.")
				} else {
					fmt.Printf("Hostname (from JavaScript): %q\n", val)
				}
				gtk.MainQuit()
			})
		}
	})

	glib.IdleAdd(func() bool {
		webView.LoadURI("https://www.google.com/")
		return false
	})

	gtk.Main()

	// output:
	// Load finished.
	// Title: "Google"
	// URI: https://www.google.com/
	// Hostname (from JavaScript): "www.google.com"
}
示例#3
0
func main() {
	flag.Usage = func() {
		fmt.Fprintln(os.Stderr)
		fmt.Fprintf(os.Stderr, "webkit-eval-js evaluates a JavaScript expression in the context of a web page\n")
		fmt.Fprintf(os.Stderr, "running in a headless instance of the WebKit browser.\n\n")
		fmt.Fprintf(os.Stderr, "Usage:\n\n")
		fmt.Fprintf(os.Stderr, "\twebkit-eval-js url script-file\n\n")
		fmt.Fprintf(os.Stderr, "url is the web page to execute the script in, and script-file is a local file\n")
		fmt.Fprintf(os.Stderr, "with the JavaScript you want to evaluate. The result is printed to stdout as JSON.\n\n")
		fmt.Fprintln(os.Stderr)
		fmt.Fprintf(os.Stderr, "Example usage:\n\n")
		fmt.Fprintf(os.Stderr, "\tTo return the value of `document.title` on https://google.com:\n")
		fmt.Fprintf(os.Stderr, "\t    $ echo document.title | webkit-eval-js https://google.com /dev/stdin\n")
		fmt.Fprintf(os.Stderr, "\tPrints:\n")
		fmt.Fprintf(os.Stderr, "\t    \"Google\"\n\n")
		fmt.Fprintf(os.Stderr, "Notes:\n\n")
		fmt.Fprintf(os.Stderr, "\tBecause a headless WebKit instance is used, your $DISPLAY must be set. Use\n")
		fmt.Fprintf(os.Stderr, "\tXvfb if you are running on a machine without an existing X server. See\n")
		fmt.Fprintf(os.Stderr, "\thttps://sourcegraph.com/github.com/sourcegraph/go-webkit2/readme for more info.\n")
		fmt.Fprintln(os.Stderr)
		os.Exit(1)
	}
	flag.Parse()

	if flag.NArg() != 2 {
		flag.Usage()
		os.Exit(1)
	}

	log := log.New(os.Stderr, "", 0)

	pageURL := flag.Arg(0)
	scriptFile := flag.Arg(1)

	if _, err := url.Parse(pageURL); err != nil {
		log.Fatalf("Failed to parse URL %q: %s", pageURL, err)
	}

	script, err := ioutil.ReadFile(scriptFile)
	if err != nil {
		log.Fatalf("Failed to open script file %q: %s", scriptFile, err)
	}

	runtime.LockOSThread()
	gtk.Init(nil)

	webView := webkit2.NewWebView()
	defer webView.Destroy()

	webView.Connect("load-failed", func() {
		fmt.Println("Load failed.")
	})
	webView.Connect("load-changed", func(_ *glib.Object, loadEvent webkit2.LoadEvent) {
		switch loadEvent {
		case webkit2.LoadFinished:
			webView.RunJavaScript(string(script), func(val *gojs.Value, err error) {
				if err != nil {
					log.Fatalf("JavaScript error: %s", err)
				} else {
					json, err := val.JSON()
					if err != nil {
						log.Fatal("JavaScript serialization error: %s", err)
					}
					fmt.Println(string(json))
				}
				gtk.MainQuit()
			})
		}
	})

	glib.IdleAdd(func() bool {
		webView.LoadURI(pageURL)
		return false
	})

	gtk.Main()
}