global urllib
import urllib.request

global downloadPage
def downloadPage(window,downloadId,url,headers = False):
	global browserWindowsLock
	global browserWindows
	if not headers: headers = {}
	response = {
		"url": url,
		"body": "",
		"headers": []
	}
	
	class rdrh(urllib.request.HTTPRedirectHandler):
		def redirect_request(self,req,fp,code,msg,hdrs,newurl):
			response["url"] = newurl
			try:
				return urllib.request.HTTPRedirectHandler.redirect_request(self, req, fp, code, msg, hdrs, newurl)
			except urllib.error.HTTPError as e:
				return e
	
	opener = urllib.request.build_opener(rdrh)
	opener.addheaders = headers
	
	try:
		requestHandler = opener.open(url)
		
		# Check whether to transfer the page to the viewer, or if to open downloader
		response["headers"] = requestHandler.getheaders()
		contentType, contentTypeArguments = getContentType(response["headers"],"application/octet-stream")
		if not contentType.startswith("text/"): # Make the fileDownloader handle the request instead
			return
		
		response["body"] = requestHandler.read()
		requestHandler.close()
	except urllib.error.HTTPError as e:
		response["body"] = e.read()
		requestHandler.close()
	except Exception as e:
		response["body"] = str(e).encode("utf-8")
		response["headers"] = [["content-type","text; charset=utf-8"]]
	
	browserWindowsLock.acquire()
	if not window in browserWindows:
		browserWindowsLock.release()
		return
	
	window.cTaskLock.acquire()
	if window.cDownloadId != downloadId:
		window.cTaskLock.release()
		browserWindowsLock.release()
		return
	
	window.cTasks.append((window.cHandleResponse,[response],{}))
	window.cTaskLock.release()
	browserWindowsLock.release()