webview

A tiny cross-platform webview library for C/C++/Golang to build modern cross-platform GUI.

It supports two-way JavaScript bindings (to call JavaScript from C/C++/Go and to call C/C++/Go from JavaScript).

It uses Cocoa/WebKit on macOS, gtk-webkit2 on Linux and MSHTML (IE10/11) on Windows.

Webview for Go developers

If you are interested in writing Webview apps in C/C++ - skip to the next section.

The program is based on the original GitHub contribution code github.com/zserge/webview

Getting started

Install Webview library with go get:

$ go get github.com/NiuStar/webview

Import the package and start using it:

package main

import (
	"github.com/NiuStar/webview"
	"strings"
	"nqc.cn/fmt"
)

func main() {
	w = webview.New(webview.Settings{
		Width:  800,
		Height: 600,
		Title:  "Simple canvas demo",
		URL:    "https://pm.cninct.com/html/test.html",
		ExternalInvokeCallback: handleRPC,
		ExternalFinishLoadForFrameCallback:didFinishLoadForFrame,
	})
	defer w.Exit()
	//
	w.Run()
	// Open wikipedia in a 800x600 resizable window
}

func handleRPC(w webview.WebView, data string) {
	fmt.Println("data:",data)
}


func didFinishLoadForFrame(w webview.WebView) {

	fmt.Start()
	if w.IsLoading() {
		fmt.Println("didFinishLoadForFrame IsLoading")
	} else {

		fmt.Println("didFinishLoadForFrame  not IsLoading",w.LoadUrl())

		fmt.Println("Cookie:",w.GetCookie())

		cookie := w.GetCookie()

		w.ClearCache()

		list := strings.Split(cookie,"&")

		c := make(map[string]interface{})

		for _,value := range list {
			l := strings.Split(value,"=")
			if len(l) > 0 {
				c[l[0]] = l[1]
			}
		}
		if strings.EqualFold( c["name"].(string) ,"PHPSESSID") {

			PHPSESSID = c["value"].(string)
		}
		w.StringByEvaluatingJavaScriptFromString(`alert('这里是JS中alert弹出的message')`)
	}

	fmt.Over()
}

News

Adding three methods

1、StringByEvaluatingJavaScriptFromString

The ObjectC call javascript.

w.StringByEvaluatingJavaScriptFromString(`alert('这里是JS中alert弹出的message')`)

2、ClearCache

clear the cookies and cache

w.ClearCache()

3、GetCookie

		cookie := w.GetCookie()
		
		list := strings.Split(cookie,"&")

		c := make(map[string]interface{})

		for _,value := range list {
			l := strings.Split(value,"=")
			if len(l) > 0 {
				c[l[0]] = l[1]
			}
		}
		if strings.EqualFold( c["name"].(string) ,"PHPSESSID") {
			PHPSESSID = c["value"].(string)
		}

4、LoadUrl

5、IsLoading

6、callback method didFinishLoadForFrame

When the frame is loaded at the end of the call

7、Add alert

you can call javascript alert

Notes

Execution on OpenBSD requires wxallowed mount(8) option.

FreeBSD is also supported, to install webkit2 run pkg install webkit2-gtk3.

License

Code is distributed under MIT license, feel free to use it in your proprietary projects as well.