examples/tutorial.py · aoplxml/cefpython

Fetch the repository succeeded.

richgiteeai

Watch

Unwatch Watching Releases Only Ignoring

1 Star 1 Fork 0

aoplxml/cefpython

Code Issues 0 Pull Requests 0 Wiki Insights Pipelines

Service

Tencent Cloud Serverless

Create your Gitee Account

Explore and code with more than 14 million developers,Free private repositories !:)

Already have an account? Sign in

文件

master

Branches (13)

Tags (29)

Manage

master

dev

cefpython66

cefpython49-winxp

cefpython58

cefpython57

cefpython56

cefpython55

cefpython54

cefpython53

cefpython52

cefpython51

cefpython31

v66.1

v49.0

v49-upstream

v66.0

v66-upstream

v57.1

v58.0-win32

v57.0

v57-upstream

v56.2

v56.1

v56.0-win

v56-upstream

v56.0

v55.4

v55.3

v55.2

v54.1

v55-upstream

v55.1

Clone or Download

Clone/Download

HTTPS SSH SVN SVN+SSH Download ZIP

Prompt

To download the code, please copy the following command and execute it in the terminal

To ensure that your submitted code identity is correctly recognized by Gitee, please execute the following command.

git config --global user.name userName 
git config --global user.email userEmail

When using the SSH protocol for the first time to clone or push code, follow the prompts below to complete the SSH configuration.

1 Generate RSA keys.

2 Obtain the content of the RSA public key and configure it in SSH Public Keys

To use SVN on Gitee, please visit the usage guide

When using the HTTPS protocol, the command line will prompt for account and password verification as follows. For security reasons, Gitee recommends configure and use personal access tokens instead of login passwords for cloning, pushing, and other operations.

Username for 'https://gitee.com': userName

Password for 'https://userName@gitee.com': # Private Token

Branches 13

Tags 29

cefpython

examples

tutorial.py

tutorial.py 7.33 KB

# Tutorial example. Doesn't depend on any third party GUI framework.
# Tested with CEF Python v57.0+

from cefpython3 import cefpython as cef
import base64
import platform
import sys
import threading

# HTML code. Browser will navigate to a Data uri created
# from this html code.
HTML_code = """
<!DOCTYPE html>
<html>
<head>
 <style type="text/css">
 body,html { font-family: Arial; font-size: 11pt; }
 div.msg { margin: 0.2em; line-height: 1.4em; }
 b { background: #ccc; font-weight: bold; font-size: 10pt;
 padding: 0.1em 0.2em; }
 b.Python { background: #eee; }
 i { font-family: Courier new; font-size: 10pt; border: #eee 1px solid;
 padding: 0.1em 0.2em; }
 </style>

function js_callback_1(ret) {
 js_print("Javascript", "html_to_data_uri", ret);
 }

function js_callback_2(msg, py_callback) {
 js_print("Javascript", "js_callback", msg);
 py_callback("String sent from Javascript");
 }

window.onload = function(){
 js_print("Javascript", "window.onload", "Called");
 js_print("Javascript", "python_property", python_property);
 js_print("Javascript", "navigator.userAgent", navigator.userAgent);
 js_print("Javascript", "cefpython_version", cefpython_version.version);
 html_to_data_uri("test", js_callback_1);
 external.test_multiple_callbacks(js_callback_2);
 };
 </script>
</head>
<body>
 <h1>Tutorial example</h1>
 <div id="console"></div>
</body>
</html>
"""

def main():
 check_versions()
 sys.excepthook = cef.ExceptHook # To shutdown all CEF processes on error
 # To change user agent use either "product_version"
 # or "user_agent" options. Explained in Tutorial in
 # "Change user agent string" section.
 settings = {
 # "product_version": "MyProduct/10.00",
 # "user_agent": "MyAgent/20.00 MyProduct/10.00",
 }
 cef.Initialize(settings=settings)
 set_global_handler()
 browser = cef.CreateBrowserSync(url=html_to_data_uri(HTML_code),
 window_title="Tutorial")
 set_client_handlers(browser)
 set_javascript_bindings(browser)
 cef.MessageLoop()
 cef.Shutdown()

def check_versions():
 ver = cef.GetVersion()
 print("[tutorial.py] CEF Python {ver}".format(ver=ver["version"]))
 print("[tutorial.py] Chromium {ver}".format(ver=ver["chrome_version"]))
 print("[tutorial.py] CEF {ver}".format(ver=ver["cef_version"]))
 print("[tutorial.py] Python {ver} {arch}".format(
 ver=platform.python_version(),
 arch=platform.architecture()[0]))
 assert cef.__version__ >= "57.0", "CEF Python v57.0+ required to run this"

def html_to_data_uri(html, js_callback=None):
 # This function is called in two ways:
 # 1. From Python: in this case value is returned
 # 2. From Javascript: in this case value cannot be returned because
 # inter-process messaging is asynchronous, so must return value
 # by calling js_callback.
 html = html.encode("utf-8", "replace")
 b64 = base64.b64encode(html).decode("utf-8", "replace")
 ret = "data:text/html;base64,{data}".format(data=b64)
 if js_callback:
 js_print(js_callback.GetFrame().GetBrowser(),
 "Python", "html_to_data_uri",
 "Called from Javascript. Will call Javascript callback now.")
 js_callback.Call(ret)
 else:
 return ret

def set_global_handler():
 # A global handler is a special handler for callbacks that
 # must be set before Browser is created using
 # SetGlobalClientCallback() method.
 global_handler = GlobalHandler()
 cef.SetGlobalClientCallback("OnAfterCreated",
 global_handler.OnAfterCreated)

def set_client_handlers(browser):
 client_handlers = [LoadHandler(), DisplayHandler()]
 for handler in client_handlers:
 browser.SetClientHandler(handler)

def set_javascript_bindings(browser):
 external = External(browser)
 bindings = cef.JavascriptBindings(
 bindToFrames=False, bindToPopups=False)
 bindings.SetProperty("python_property", "This property was set in Python")
 bindings.SetProperty("cefpython_version", cef.GetVersion())
 bindings.SetFunction("html_to_data_uri", html_to_data_uri)
 bindings.SetObject("external", external)
 browser.SetJavascriptBindings(bindings)

def js_print(browser, lang, event, msg):
 # Execute Javascript function "js_print"
 browser.ExecuteFunction("js_print", lang, event, msg)

class GlobalHandler(object):
 def OnAfterCreated(self, browser, **_):
 """Called after a new browser is created."""
 # DOM is not yet loaded. Using js_print at this moment will
 # throw an error: "Uncaught ReferenceError: js_print is not defined".
 # We make this error on purpose. This error will be intercepted
 # in DisplayHandler.OnConsoleMessage.
 js_print(browser, "Python", "OnAfterCreated",
 "This will probably never display as DOM is not yet loaded")
 # Delay print by 0.5 sec, because js_print is not available yet
 args = [browser, "Python", "OnAfterCreated",
 "(Delayed) Browser id="+str(browser.GetIdentifier())]
 threading.Timer(0.5, js_print, args).start()

class LoadHandler(object):
 def OnLoadingStateChange(self, browser, is_loading, **_):
 """Called when the loading state has changed."""
 if not is_loading:
 # Loading is complete. DOM is ready.
 js_print(browser, "Python", "OnLoadingStateChange",
 "Loading is complete")

class DisplayHandler(object):
 def OnConsoleMessage(self, browser, message, **_):
 """Called to display a console message."""
 # This will intercept js errors, see comments in OnAfterCreated
 if "error" in message.lower() or "uncaught" in message.lower():
 # Prevent infinite recurrence in case something went wrong
 if "js_print is not defined" in message.lower():
 if hasattr(self, "js_print_is_not_defined"):
 print("Python: OnConsoleMessage: "
 "Intercepted Javascript error: "+message)
 return
 else:
 self.js_print_is_not_defined = True
 # Delay print by 0.5 sec, because js_print may not be
 # available yet due to DOM not ready.
 args = [browser, "Python", "OnConsoleMessage",
 "(Delayed) Intercepted Javascript error: <i>{error}</i>"
 .format(error=message)]
 threading.Timer(0.5, js_print, args).start()

class External(object):
 def __init__(self, browser):
 self.browser = browser

def test_multiple_callbacks(self, js_callback):
 """Test both javascript and python callbacks."""
 js_print(self.browser, "Python", "test_multiple_callbacks",
 "Called from Javascript. Will call Javascript callback now.")

def py_callback(msg_from_js):
 js_print(self.browser, "Python", "py_callback", msg_from_js)
 js_callback.Call("String sent from Python", py_callback)

if __name__ == '__main__':
 main()

Copy Edit Raw Blame History

cztomczak authored 2018年02月18日 19:26 +08:00 . Update examples - print Chromium and CEF version numbers

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200

# Tutorial example. Doesn't depend on any third party GUI framework.
# Tested with CEF Python v57.0+

from cefpython3 import cefpython as cef
import base64
import platform
import sys
import threading

# HTML code. Browser will navigate to a Data uri created
# from this html code.
HTML_code = """
<!DOCTYPE html>
<html>
<head>
 <style type="text/css">
 body,html { font-family: Arial; font-size: 11pt; }
 div.msg { margin: 0.2em; line-height: 1.4em; }
 b { background: #ccc; font-weight: bold; font-size: 10pt;
 padding: 0.1em 0.2em; }
 b.Python { background: #eee; }
 i { font-family: Courier new; font-size: 10pt; border: #eee 1px solid;
 padding: 0.1em 0.2em; }
 </style>

 <script>
 function js_print(lang, event, msg) {
 msg = "<b class="+lang+">"+lang+": "+event+":</b> " + msg;
 console = document.getElementById("console")
 console.innerHTML += "<div class=msg>"+msg+"</div>";
 }

 function js_callback_1(ret) {
 js_print("Javascript", "html_to_data_uri", ret);
 }

 function js_callback_2(msg, py_callback) {
 js_print("Javascript", "js_callback", msg);
 py_callback("String sent from Javascript");
 }

 window.onload = function(){
 js_print("Javascript", "window.onload", "Called");
 js_print("Javascript", "python_property", python_property);
 js_print("Javascript", "navigator.userAgent", navigator.userAgent);
 js_print("Javascript", "cefpython_version", cefpython_version.version);
 html_to_data_uri("test", js_callback_1);
 external.test_multiple_callbacks(js_callback_2);
 };
 </script>
</head>
<body>
 <h1>Tutorial example</h1>
 <div id="console"></div>
</body>
</html>
"""


def main():
 check_versions()
 sys.excepthook = cef.ExceptHook # To shutdown all CEF processes on error
 # To change user agent use either "product_version"
 # or "user_agent" options. Explained in Tutorial in
 # "Change user agent string" section.
 settings = {
 # "product_version": "MyProduct/10.00",
 # "user_agent": "MyAgent/20.00 MyProduct/10.00",
 }
 cef.Initialize(settings=settings)
 set_global_handler()
 browser = cef.CreateBrowserSync(url=html_to_data_uri(HTML_code),
 window_title="Tutorial")
 set_client_handlers(browser)
 set_javascript_bindings(browser)
 cef.MessageLoop()
 cef.Shutdown()


def check_versions():
 ver = cef.GetVersion()
 print("[tutorial.py] CEF Python {ver}".format(ver=ver["version"]))
 print("[tutorial.py] Chromium {ver}".format(ver=ver["chrome_version"]))
 print("[tutorial.py] CEF {ver}".format(ver=ver["cef_version"]))
 print("[tutorial.py] Python {ver} {arch}".format(
 ver=platform.python_version(),
 arch=platform.architecture()[0]))
 assert cef.__version__ >= "57.0", "CEF Python v57.0+ required to run this"


def html_to_data_uri(html, js_callback=None):
 # This function is called in two ways:
 # 1. From Python: in this case value is returned
 # 2. From Javascript: in this case value cannot be returned because
 # inter-process messaging is asynchronous, so must return value
 # by calling js_callback.
 html = html.encode("utf-8", "replace")
 b64 = base64.b64encode(html).decode("utf-8", "replace")
 ret = "data:text/html;base64,{data}".format(data=b64)
 if js_callback:
 js_print(js_callback.GetFrame().GetBrowser(),
 "Python", "html_to_data_uri",
 "Called from Javascript. Will call Javascript callback now.")
 js_callback.Call(ret)
 else:
 return ret


def set_global_handler():
 # A global handler is a special handler for callbacks that
 # must be set before Browser is created using
 # SetGlobalClientCallback() method.
 global_handler = GlobalHandler()
 cef.SetGlobalClientCallback("OnAfterCreated",
 global_handler.OnAfterCreated)


def set_client_handlers(browser):
 client_handlers = [LoadHandler(), DisplayHandler()]
 for handler in client_handlers:
 browser.SetClientHandler(handler)


def set_javascript_bindings(browser):
 external = External(browser)
 bindings = cef.JavascriptBindings(
 bindToFrames=False, bindToPopups=False)
 bindings.SetProperty("python_property", "This property was set in Python")
 bindings.SetProperty("cefpython_version", cef.GetVersion())
 bindings.SetFunction("html_to_data_uri", html_to_data_uri)
 bindings.SetObject("external", external)
 browser.SetJavascriptBindings(bindings)


def js_print(browser, lang, event, msg):
 # Execute Javascript function "js_print"
 browser.ExecuteFunction("js_print", lang, event, msg)


class GlobalHandler(object):
 def OnAfterCreated(self, browser, **_):
 """Called after a new browser is created."""
 # DOM is not yet loaded. Using js_print at this moment will
 # throw an error: "Uncaught ReferenceError: js_print is not defined".
 # We make this error on purpose. This error will be intercepted
 # in DisplayHandler.OnConsoleMessage.
 js_print(browser, "Python", "OnAfterCreated",
 "This will probably never display as DOM is not yet loaded")
 # Delay print by 0.5 sec, because js_print is not available yet
 args = [browser, "Python", "OnAfterCreated",
 "(Delayed) Browser id="+str(browser.GetIdentifier())]
 threading.Timer(0.5, js_print, args).start()


class LoadHandler(object):
 def OnLoadingStateChange(self, browser, is_loading, **_):
 """Called when the loading state has changed."""
 if not is_loading:
 # Loading is complete. DOM is ready.
 js_print(browser, "Python", "OnLoadingStateChange",
 "Loading is complete")


class DisplayHandler(object):
 def OnConsoleMessage(self, browser, message, **_):
 """Called to display a console message."""
 # This will intercept js errors, see comments in OnAfterCreated
 if "error" in message.lower() or "uncaught" in message.lower():
 # Prevent infinite recurrence in case something went wrong
 if "js_print is not defined" in message.lower():
 if hasattr(self, "js_print_is_not_defined"):
 print("Python: OnConsoleMessage: "
 "Intercepted Javascript error: "+message)
 return
 else:
 self.js_print_is_not_defined = True
 # Delay print by 0.5 sec, because js_print may not be
 # available yet due to DOM not ready.
 args = [browser, "Python", "OnConsoleMessage",
 "(Delayed) Intercepted Javascript error: <i>{error}</i>"
 .format(error=message)]
 threading.Timer(0.5, js_print, args).start()


class External(object):
 def __init__(self, browser):
 self.browser = browser

 def test_multiple_callbacks(self, js_callback):
 """Test both javascript and python callbacks."""
 js_print(self.browser, "Python", "test_multiple_callbacks",
 "Called from Javascript. Will call Javascript callback now.")

 def py_callback(msg_from_js):
 js_print(self.browser, "Python", "py_callback", msg_from_js)
 js_callback.Call("String sent from Python", py_callback)


if __name__ == '__main__':
 main()