examples/snippets/javascript_errors.py · aoplxml/cefpython

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cefpython

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javascript_errors.py

javascript_errors.py 1.54 KB

"""
Two ways for intercepting Javascript errors:
1. window.onerror event in Javascript
2. DisplayHandler.OnConsoleMessage in Python
"""

from cefpython3 import cefpython as cef

g_htmlcode = """
<!doctype html>
<html>
<head>
 <style>
 body, html {
 font-family: Arial;
 font-size: 11pt;
 }
 </style>
 <script>
 function print(msg) {
 document.getElementById("console").innerHTML += msg+"<br>";
 }
 window.onerror = function(message, source, lineno, colno, error) {
 print("[JS:window.onerror] "+error+" (line "+lineno+")");
 // Return false so that default event handler is fired and
 // OnConsoleMessage can also intercept this error.
 return false;
 };
 window.onload = function() {
 forceError();
 };
 </script>
</head>
<body>
 <h1>Javascript Errors</h1>
 <div id=console></div>
</body>
</html>
"""

def main():
 cef.Initialize()
 browser = cef.CreateBrowserSync(url=cef.GetDataUrl(g_htmlcode),
 window_title="Javascript Errors")
 browser.SetClientHandler(DisplayHandler())
 cef.MessageLoop()
 cef.Shutdown()

class DisplayHandler(object):
 def OnConsoleMessage(self, browser, message, line, **_):
 if "error" in message.lower() or "uncaught" in message.lower():
 logmsg = "[Py:OnConsoleMessage] {message} (line {line})" \
 .format(message=message, line=line)
 print(logmsg)
 browser.ExecuteFunction("print", logmsg)

if __name__ == '__main__':
 main()

一键复制编辑原始数据按行查看历史

cztomczak 提交于 2018年08月20日 18:13 +08:00 . Add javascript_erors.py and ondomready.py snippets (#403)

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

"""
Two ways for intercepting Javascript errors:
1. window.onerror event in Javascript
2. DisplayHandler.OnConsoleMessage in Python
"""

from cefpython3 import cefpython as cef

g_htmlcode = """
<!doctype html>
<html>
<head>
 <style>
 body, html {
 font-family: Arial;
 font-size: 11pt;
 }
 </style>
 <script>
 function print(msg) {
 document.getElementById("console").innerHTML += msg+"<br>";
 }
 window.onerror = function(message, source, lineno, colno, error) {
 print("[JS:window.onerror] "+error+" (line "+lineno+")");
 // Return false so that default event handler is fired and
 // OnConsoleMessage can also intercept this error.
 return false;
 };
 window.onload = function() {
 forceError();
 };
 </script>
</head>
<body>
 <h1>Javascript Errors</h1>
 <div id=console></div>
</body>
</html>
"""


def main():
 cef.Initialize()
 browser = cef.CreateBrowserSync(url=cef.GetDataUrl(g_htmlcode),
 window_title="Javascript Errors")
 browser.SetClientHandler(DisplayHandler())
 cef.MessageLoop()
 cef.Shutdown()


class DisplayHandler(object):
 def OnConsoleMessage(self, browser, message, line, **_):
 if "error" in message.lower() or "uncaught" in message.lower():
 logmsg = "[Py:OnConsoleMessage] {message} (line {line})" \
 .format(message=message, line=line)
 print(logmsg)
 browser.ExecuteFunction("print", logmsg)


if __name__ == '__main__':
 main()