cefpython/cefpython/cef1/windows/binaries/wxpython.py at v31.2 · pythonthings/cefpython · GitHub

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# An example of embedding CEF in wxPython application.

import platform

if platform.architecture()[0] != "32bit":

raise Exception("Only 32bit architecture is supported")

import os, sys

libcef_dll = os.path.join(os.path.dirname(os.path.abspath(__file__)),

'libcef.dll')

if os.path.exists(libcef_dll):

# Import the local module.

if 0x02070000 <= sys.hexversion < 0x03000000:

import cefpython_py27 as cefpython

elif 0x03000000 <= sys.hexversion < 0x04000000:

import cefpython_py32 as cefpython

else:

raise Exception("Unsupported python version: %s" % sys.version)

else:

# Import the package.

from cefpython1 import cefpython

import wx

import time

import re

import uuid

# Which method to use for message loop processing.

# EVT_IDLE - wx application has priority (default)

# EVT_TIMER - cef browser has priority

# From the tests it seems that Flash content behaves

# better when using a timer.

USE_EVT_IDLE = True

def GetApplicationPath(file=None):

import re, os, platform

# If file is None return current directory without trailing slash.

if file is None:

file = ""

# Only when relative path.

if not file.startswith("/") and not file.startswith("\\") and (

not re.search(r"^[\w-]+:", file)):

if hasattr(sys, "frozen"):

path = os.path.dirname(sys.executable)

elif "__file__" in globals():

path = os.path.dirname(os.path.realpath(__file__))

else:

path = os.getcwd()

path = path + os.sep + file

if platform.system() == "Windows":

path = re.sub(r"[/\\]+", re.escape(os.sep), path)

path = re.sub(r"[/\\]+$", "", path)

return path

return str(file)

def ExceptHook(excType, excValue, traceObject):

import traceback, os, time, codecs

# This hook does the following: in case of exception write it to

# the "error.log" file, display it to the console, shutdown CEF

# and exit application immediately by ignoring "finally" (_exit()).

errorMsg = "\n".join(traceback.format_exception(excType, excValue,

traceObject))

errorFile = GetApplicationPath("error.log")

try:

appEncoding = cefpython.g_applicationSettings["string_encoding"]

except:

appEncoding = "utf-8"

if type(errorMsg) == bytes:

errorMsg = errorMsg.decode(encoding=appEncoding, errors="replace")

try:

with codecs.open(errorFile, mode="a", encoding=appEncoding) as fp:

fp.write("\n[%s] %s\n" % (

time.strftime("%Y-%m-%d %H:%M:%S"), errorMsg))

except:

print("cefpython: WARNING: failed writing to error file: %s" % (

errorFile))

# Convert error message to ascii before printing, otherwise

# you may get error like this:

# | UnicodeEncodeError: 'charmap' codec can't encode characters

errorMsg = errorMsg.encode("ascii", errors="replace")

errorMsg = errorMsg.decode("ascii", errors="replace")

print("\n"+errorMsg+"\n")

cefpython.QuitMessageLoop()

cefpython.Shutdown()

os._exit(1)

class MainFrame(wx.Frame):

browser = None

def __init__(self):

wx.Frame.__init__(self, parent=None, id=wx.ID_ANY,

title='wxPython example', size=(800,600))

self.CreateMenu()

windowInfo = cefpython.WindowInfo()

windowInfo.SetAsChild(self.GetHandle())

self.browser = cefpython.CreateBrowserSync(windowInfo,

browserSettings={},

navigateUrl=GetApplicationPath("wxpython.html"))

self.browser.SetClientHandler(ClientHandler())

jsBindings = cefpython.JavascriptBindings(

bindToFrames=False, bindToPopups=False)

jsBindings.SetObject("external", JavascriptBindings(self.browser))

self.browser.SetJavascriptBindings(jsBindings)

self.Bind(wx.EVT_SET_FOCUS, self.OnSetFocus)

self.Bind(wx.EVT_SIZE, self.OnSize)

self.Bind(wx.EVT_CLOSE, self.OnClose)

if USE_EVT_IDLE:

# Bind EVT_IDLE only for the main application frame.

self.Bind(wx.EVT_IDLE, self.OnIdle)

def CreateMenu(self):

filemenu = wx.Menu()

filemenu.Append(1, "Open")

exit = filemenu.Append(2, "Exit")

self.Bind(wx.EVT_MENU, self.OnClose, exit)

aboutmenu = wx.Menu()

aboutmenu.Append(1, "CEF Python")

menubar = wx.MenuBar()

menubar.Append(filemenu,"&File")

menubar.Append(aboutmenu, "&About")

self.SetMenuBar(menubar)

def OnSetFocus(self, event):

cefpython.WindowUtils.OnSetFocus(self.GetHandle(), 0, 0, 0)

def OnSize(self, event):

cefpython.WindowUtils.OnSize(self.GetHandle(), 0, 0, 0)

def OnClose(self, event):

self.browser.CloseBrowser()

self.Destroy()

def OnIdle(self, event):

cefpython.MessageLoopWork()

class JavascriptBindings:

mainBrowser = None

webRequest = None

webRequestId = 0

cookieVisitor = None

def __init__(self, mainBrowser):

self.mainBrowser = mainBrowser

def WebRequest(self, url):

request = cefpython.Request.CreateRequest()

request.SetUrl(url)

webRequestClient = WebRequestClient()

# Must keep the reference otherwise WebRequestClient

# callbacks won't be called.

self.webRequest = cefpython.WebRequest.CreateWebRequest(request,

webRequestClient)

def DoCallFunction(self):

self.mainBrowser.GetMainFrame().CallFunction(

"MyFunction", "abc", 12, [1,2,3], {"qwe": 456, "rty": 789})

def VisitAllCookies(self):

# Need to keep the reference alive.

self.cookieVisitor = CookieVisitor()

cookieManager = self.mainBrowser.GetUserData("cookieManager")

if not cookieManager:

print("\nCookie manager not yet created! Visit http website first")

return

cookieManager.VisitAllCookies(self.cookieVisitor)

def VisitUrlCookies(self):

# Need to keep the reference alive.

self.cookieVisitor = CookieVisitor()

cookieManager = self.mainBrowser.GetUserData("cookieManager")

if not cookieManager:

print("\nCookie manager not yet created! Visit http website first")

return

cookieManager.VisitUrlCookies(

"http://www.html-kit.com/tools/cookietester/",

False, self.cookieVisitor)

# .www.html-kit.com

def SetCookie(self):

cookieManager = self.mainBrowser.GetUserData("cookieManager")

if not cookieManager:

print("\nCookie manager not yet created! Visit http website first")

return

cookie = cefpython.Cookie()

cookie.SetName("Created_Via_Python")

cookie.SetValue("yeah really")

cookieManager.SetCookie("http://www.html-kit.com/tools/cookietester/",

cookie)

print("\nCookie created! Visit html-kit cookietester to see it")

def DeleteCookies(self):

cookieManager = self.mainBrowser.GetUserData("cookieManager")

if not cookieManager:

print("\nCookie manager not yet created! Visit http website first")

return

cookieManager.DeleteCookies(

"http://www.html-kit.com/tools/cookietester/",

"Created_Via_Python")

print("\nCookie deleted! Visit html-kit cookietester to see the result")

class CookieVisitor:

def Visit(self, cookie, count, total, deleteCookie):

if count == 0:

print("\nCookieVisitor.Visit(): total cookies: %s" % total)

print("\nCookieVisitor.Visit(): cookie:")

print(cookie.Get())

# True to continue visiting cookies

return True

class WebRequestClient:

def OnStateChange(self, webRequest, state):

stateName = "unknown"

for key, value in cefpython.WebRequest.State.iteritems():

if value == state:

stateName = key

print("\nWebRequestClient::OnStateChange(): state = %s" % stateName)

def OnRedirect(self, webRequest, request, response):

print("\nWebRequestClient::OnRedirect(): url = %s" % (

request.GetUrl()[:80]))

def OnHeadersReceived(self, webRequest, response):

print("\nWebRequestClient::OnHeadersReceived(): headers = %s" % (

response.GetHeaderMap()))

def OnProgress(self, webRequest, bytesSent, totalBytesToBeSent):

print("\nWebRequestClient::OnProgress(): bytesSent = %s, "

"totalBytesToBeSent = %s" % (bytesSent, totalBytesToBeSent))

def OnData(self, webRequest, data):

print("\nWebRequestClient::OnData(): data:")

print("-" * 60)

print(data)

print("-" * 60)

def OnError(self, webRequest, errorCode):

print("\nWebRequestClient::OnError(): errorCode = %s" % errorCode)

class ContentFilterHandler:

def OnData(self, data, substitute_data):

if data == "body { color: red; }":

substitute_data.SetData("body { color: green; }")

def OnDrain(self, remainder):

remainder.SetData("body h3 { color: orange; }")

class ClientHandler:

# --------------------------------------------------------------------------

# RequestHandler

# --------------------------------------------------------------------------

contentFilter = None

def OnBeforeBrowse(self, browser, frame, request, navType, isRedirect):

# - frame.GetUrl() returns current url

# - request.GetUrl() returns new url

# - Return true to cancel the navigation or false to allow

# the navigation to proceed.

# - Modifying headers or post data can be done only in

# OnBeforeResourceLoad()

print("\nOnBeforeBrowse(): request.GetUrl() = %s, "

"request.GetHeaderMap(): %s" % (

request.GetUrl()[:80], request.GetHeaderMap()))

if request.GetMethod() == "POST":

print("\nOnBeforeBrowse(): POST data: %s" % (

request.GetPostData()))

def OnBeforeResourceLoad(self, browser, request, redirectUrl,

streamReader, response, loadFlags):

print("\nOnBeforeResourceLoad(): request.GetUrl() = %s" % (

request.GetUrl()[:80]))

if request.GetMethod() == "POST":

if request.GetUrl().startswith(

"https://accounts.google.com/ServiceLogin"):

postData = request.GetPostData()

postData["Email"] = "--changed via python"

request.SetPostData(postData)

print("\nOnBeforeResourceLoad(): modified POST data: %s" % (

request.GetPostData()))

if request.GetUrl().endswith("replace-on-the-fly.css"):

print("\nOnBeforeResourceLoad(): replacing css on the fly")

response.SetStatus(200)

response.SetStatusText("OK")

response.SetMimeType("text/css")

streamReader.SetData("body { color: red; }")

def OnResourceRedirect(self, browser, oldUrl, newUrl):

print("\nOnResourceRedirect(): oldUrl: %s, newUrl: %s" % (

oldUrl, newUrl[0]))

def OnResourceResponse(self, browser, url, response, contentFilter):

print("\nOnResourceResponse(): url = %s, headers = %s" % (

url[:80], response.GetHeaderMap()))

if url.endswith("content-filter/replace-on-the-fly.css"):

print("\nOnResourceResponse(): setting contentFilter handler")

contentFilter.SetHandler(ContentFilterHandler())

# Must keep the reference to contentFilter otherwise

# ContentFilterHandler callbacks won't be called.

self.contentFilter = contentFilter

def GetCookieManager(self, browser, mainUrl):

# Create unique cookie manager for each browser.

cookieManager = browser.GetUserData("cookieManager")

if cookieManager:

return cookieManager

else:

cookieManager = cefpython.CookieManager.CreateManager("")

browser.SetUserData("cookieManager", cookieManager)

return cookieManager

# --------------------------------------------------------------------------

# DragHandler

# --------------------------------------------------------------------------

def OnDragStart(self, browser, dragData, mask):

maskNames = ""

for key, value in cefpython.Drag.Operation.iteritems():

if value and (value & mask) == value:

maskNames += " "+key

print("\nOnDragStart(): mask=%s" % maskNames)

print(" IsLink(): %s" % dragData.IsLink())

print(" IsFragment(): %s" % dragData.IsFragment())

print(" IsFile(): %s" % dragData.IsFile())

print(" GetLinkUrl(): %s" % dragData.GetLinkUrl())

print(" GetLinkTitle(): %s" % dragData.GetLinkTitle())

print(" GetLinkMetadata(): %s" % dragData.GetLinkMetadata())

print(" GetFragmentText(): %s" % dragData.GetFragmentText())

print(" GetFragmentHtml(): %s" % dragData.GetFragmentHtml())

print(" GetFragmentBaseUrl(): %s" % dragData.GetFragmentBaseUrl())

print(" GetFile(): %s" % dragData.GetFile())

print(" GetFiles(): %s" % dragData.GetFiles())

# Returning True on Linux causes segmentation fault,

# reported the bug here:

# http://www.magpcss.org/ceforum/viewtopic.php?f=6&t=10693

# Not being able to cancel a drag event is a problem

# only when a link or a folder is dragged, as this will

# cause loading the link or the folder in the browser window.

# When dragging text/html or a file it is not a problem, as

# it does not lead to browser navigating.

if platform.system() == "Windows":

# Return true to cancel the drag event.

return True

else:

return False

def OnDragEnter(self, browser, dragData, mask):

maskNames = ""

for key, value in cefpython.Drag.Operation.iteritems():

if value and (value & mask) == value:

maskNames += " "+key

print("\nOnDragEnter(): mask=%s" % maskNames)

print(" IsLink(): %s" % dragData.IsLink())

print(" IsFragment(): %s" % dragData.IsFragment())

print(" IsFile(): %s" % dragData.IsFile())

print(" GetLinkUrl(): %s" % dragData.GetLinkUrl())

print(" GetLinkTitle(): %s" % dragData.GetLinkTitle())

print(" GetLinkMetadata(): %s" % dragData.GetLinkMetadata())

print(" GetFragmentText(): %s" % dragData.GetFragmentText())

print(" GetFragmentHtml(): %s" % dragData.GetFragmentHtml())

print(" GetFragmentBaseUrl(): %s" % dragData.GetFragmentBaseUrl())

print(" GetFile(): %s" % dragData.GetFile())

print(" GetFiles(): %s" % dragData.GetFiles())

# Returning True on Linux causes segmentation fault,

# reported the bug here:

# http://www.magpcss.org/ceforum/viewtopic.php?f=6&t=10693

# Not being able to cancel a drag event is a problem

# only when a link or a folder is dragged, as this will

# cause loading the link or the folder in the browser window.

# When dragging text/html or a file it is not a problem, as

# it does not lead to browser navigating.

if platform.system() == "Windows":

# Return true to cancel the drag event.

return True

else:

return False

# --------------------------------------------------------------------------

# DownloadHandler

# --------------------------------------------------------------------------

downloadHandler = None

def GetDownloadHandler(self, browser, mimeType, filename, contentLength):

# Close the browser window if it is a popup with

# no other document contents.

if browser.IsPopup() and not browser.HasDocument():

browser.CloseBrowser()

# The reference to DownloadHandler must be kept alive

# while download proceeds.

if self.downloadHandler and self.downloadHandler.downloading:

print("\nDownload is already in progress")

return False

self.downloadHandler = DownloadHandler(mimeType, filename,

contentLength)

return self.downloadHandler

class DownloadHandler:

mimeType = ""

filename = ""

contentLength = -1 # -1 means that file size was not provided.

fp = None

downloadsDir = "./downloads"

alreadyDownloaded = 0

downloading = False

def __init__(self, mimeType, filename, contentLength):

self.downloading = True

if not os.path.exists(self.downloadsDir):

os.mkdir(self.downloadsDir)

filename = filename.strip()

if not len(filename):

filename = self.GetUniqueFilename()

filename = self.GetSafeFilename(filename)

print("\nDownloadHandler() created")

print("mimeType: %s" % mimeType)

print("filename: %s" % filename)

print("contentLength: %s" % contentLength)

# Append ".downloading" to the filename, in OnComplete()

# when download finishes get rid of this extension.

filename += ".downloading"

if os.path.exists(self.downloadsDir+"/"+filename):

# If the last download did not succeed, the

# "xxx.downloading" might still be there.

os.remove(self.downloadsDir+"/"+filename)

self.mimeType = mimeType

self.filename = filename

self.contentLength = contentLength

self.fp = open(self.downloadsDir+"/"+filename, "wb")

def GetSafeFilename(self, filename):

# TODO:

# - remove any unsafe characters (".." or "/" or "\" and

# others), the safest way is to have a regexp with a list

# safe characters. The dots ".." is a special case that

# needs to be treated separately.

if os.path.exists(self.downloadsDir+"/"+filename):

filename = self.GetUniqueFilename()[:4]+"_"+filename

assert not os.path.exists(self.downloadsDir+"/"+filename), (

"File aready exists")

return filename

def GetUniqueFilename(self):

# The filename may be empty, in that case generate

# an unique name.

# TODO:

# - guess the extension using the mimeType (but mimeType

# may also be empty), "text/css" => ".css".

return str(uuid.uuid4()).replace("-", "")[:16]

def OnData(self, data):

# TODO: display progress in percentage or/and KiB/MiB.

if self.alreadyDownloaded == 0:

sys.stdout.write("Download progress: ")

sys.stdout.write(".")

sys.stdout.flush()

self.alreadyDownloaded += len(data)

self.fp.write(data)

# time.sleep(1) # Let's make the progress a bit slower (if cached)

# Return True to continue receiving data, False to cancel.

return True

def OnComplete(self):

sys.stdout.write("\n")

sys.stdout.flush()

self.fp.close()

currentFile = self.downloadsDir+"/"+self.filename

newFilename = re.sub(".downloading$", "", self.filename)

os.rename(self.downloadsDir+"/"+self.filename,

self.downloadsDir+"/"+newFilename)

self.downloading = False

print("\nDownload complete!")

print("Total downloaded: %s" % self.PrettyBytes(

self.alreadyDownloaded))

print("See the 'downloads' directory.")

def PrettyBytes(self, bytes):

KiB = 1024

return "%.3g KiB" % (bytes / KiB)

class MyApp(wx.App):

timer = None

timerID = 1

def OnInit(self):

if not USE_EVT_IDLE:

self.CreateTimer()

frame = MainFrame()

self.SetTopWindow(frame)

frame.Show()

return True

def CreateTimer(self):

# See "Making a render loop":

# http://wiki.wxwidgets.org/Making_a_render_loop

# Another approach is to use EVT_IDLE in MainFrame,

# see which one fits you better.

self.timer = wx.Timer(self, self.timerID)

self.timer.Start(10) # 10ms

wx.EVT_TIMER(self, self.timerID, self.OnTimer)

def OnTimer(self, event):

cefpython.MessageLoopWork()

def OnExit(self):

# When app.MainLoop() returns, MessageLoopWork() should

# not be called anymore.

if not USE_EVT_IDLE:

self.timer.Stop()

if __name__ == '__main__':

sys.excepthook = ExceptHook

# cefpython.g_debug = True

# cefpython.g_debugFile = GetApplicationPath("debug.log")

settings = {

"log_severity": cefpython.LOGSEVERITY_INFO,

"log_file": GetApplicationPath("debug.log"),

"release_dcheck_enabled": True # Enable only when debugging.

}

cefpython.Initialize(settings)

print('wx.version=%s' % wx.version())

app = MyApp(False)

app.MainLoop()

# Let wx.App destructor do the cleanup before calling cefpython.Shutdown().

del app

cefpython.Shutdown()

cefpython/cefpython/cef1/windows/binaries/wxpython.py at v31.2 · pythonthings/cefpython · GitHub

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