1 # -*- coding: UTF-8 -*-
5 # - better error handling
6 # - use namespace parser
8 from Tools.Import import my_import
10 from Components.Sources.Source import ObsoleteSource
11 from Components.Converter.Converter import Converter
12 from Components.Element import Element
14 from xml.sax import make_parser
15 from xml.sax.handler import ContentHandler, feature_namespaces
16 from xml.sax.saxutils import escape as escape_xml
17 from twisted.python import util
18 from urllib2 import quote
20 #DO NOT REMOVE THIS IMPORT
21 #It IS used (dynamically)
22 from WebScreens import *
23 #DO NOT REMOVE THIS IMPORT
26 # The classes and Function in File handle all ScreenPage-based requests
27 # ScreenPages use enigma2 standard functionality to bring contents to a webfrontend
29 # Like Skins a ScreenPage can consist of several Elements and Converters
31 #===============================================================================
34 # This is the Standard Element for Rendering a "standard" WebElement
35 #===============================================================================
36 class OneTimeElement(Element):
37 def __init__(self, id):
38 Element.__init__(self)
41 def handleCommand(self, args):
42 if ',' in self.source_id:
43 paramlist = self.source_id.split(",")
46 arg = args.get(key, ())
51 list[key] = "".join(arg)
54 self.source.handleCommand(list)
56 for c in args.get(self.source_id, ()):
57 self.source.handleCommand(c)
59 def render(self, request):
60 t = self.source.getHTML(self.source_id)
64 self.suspended = False
78 #===============================================================================
81 # A MacroElement helps using OneTimeElements inside a (Simple)ListFiller Loop
82 #===============================================================================
83 class MacroElement(OneTimeElement):
84 def __init__(self, id, macro_dict, macro_name):
85 OneTimeElement.__init__(self, id)
86 self.macro_dict = macro_dict
87 self.macro_name = macro_name
89 def render(self, request):
90 self.macro_dict[self.macro_name] = self.source.getHTML(self.source_id)
92 #===============================================================================
95 # In difference to an OneTimeElement a StreamingElement sends an ongoing Stream
96 # of Data. The end of the Streaming is usually when the client disconnects
97 #===============================================================================
98 class StreamingElement(OneTimeElement):
99 def __init__(self, id):
100 OneTimeElement.__init__(self, id)
103 def changed(self, what):
105 self.render(self.request)
107 def setRequest(self, request):
108 self.request = request
110 #===============================================================================
113 # a to-be-filled list item
114 #===============================================================================
116 def __init__(self, name, filternum):
118 self.filternum = filternum
120 #===============================================================================
123 # MacroItem inside a (Simple)ListFiller
124 #===============================================================================
126 def __init__(self, macrodict, macroname):
127 self.macrodict = macrodict
128 self.macroname = macroname
131 #===============================================================================
134 # Returns the String as is
135 #===============================================================================
136 class TextToHTML(Converter):
137 def __init__(self, arg):
138 Converter.__init__(self, arg)
140 def getHTML(self, id):
141 return self.source.text # encode & etc. here!
143 #===============================================================================
146 # Escapes the given Text to be XML conform
147 #===============================================================================
148 class TextToXML(Converter):
149 def __init__(self, arg):
150 Converter.__init__(self, arg)
152 def getHTML(self, id):
153 return escape_xml(self.source.text).replace("\x19", "").replace("\x1c", "").replace("\x1e", "")
155 #===============================================================================
158 # Escapes the given Text so it can be used inside a URL
159 #===============================================================================
160 class TextToURL(Converter):
161 def __init__(self, arg):
162 Converter.__init__(self, arg)
164 def getHTML(self, id):
165 return self.source.text.replace(" ", "%20").replace("+", "%2b").replace("&", "%26")
167 #===============================================================================
170 # Returns a XML only consisting of <rootElement />
171 #===============================================================================
172 class ReturnEmptyXML(Converter):
173 def __init__(self, arg):
174 Converter.__init__(self, arg)
176 def getHTML(self, id):
177 return "<rootElement />"
179 #===============================================================================
181 # Return simply NOTHING
182 # Useful if you only want to issue a command.
183 #===============================================================================
184 class Null(Converter):
185 def __init__(self, arg):
186 Converter.__init__(self, arg)
188 def getHTML(self, id):
192 #===============================================================================
195 # Transforms a string into a javascript update pattern
196 #===============================================================================
197 class JavascriptUpdate(Converter):
198 def __init__(self, arg):
199 Converter.__init__(self, arg)
201 def getHTML(self, id):
202 # 3c5x9, added parent. , this is because the ie loads this in a iframe. an the set is in index.html.xml
203 # all other will replace this in JS
204 return '<script>parent.set("%s", "%s");</script>\n' % (id, self.source.text.replace("\\", "\\\\").replace("\n", "\\n").replace('"', '\\"').replace('\xb0', '°'))
206 #===============================================================================
209 # The performant 'one-dimensonial listfiller' engine (podlfe)
210 #===============================================================================
211 class SimpleListFiller(Converter):
212 def __init__(self, arg):
213 Converter.__init__(self, arg)
216 l = self.source.simplelist
217 conv_args = self.converter_arguments
220 for element in conv_args:
221 if isinstance(element, basestring):
222 list.append((element, None))
223 elif isinstance(element, ListItem):
224 list.append((element, element.filternum))
225 elif isinstance(element, ListMacroItem):
226 list.append(element.macrodict[element.macroname], None)
228 raise Exception("neither string, ListItem nor ListMacroItem")
231 append = strlist.append
236 for (element, filternum) in list:
240 append(str(item).replace("\\", "\\\\").replace("\n", "\\n").replace('"', '\\"'))
242 append(escape_xml(str(item)))
244 append(str(item).replace("%", "%25").replace("+", "%2B").replace('&', '%26').replace('?', '%3f').replace(' ', '+'))
246 append(quote(str(item)))
248 time = parseint(item) or 0
250 append("%02d:%02d" % (t.tm_hour, t.tm_min))
252 time = parseint(item) or 0
254 append("%d min" % (time / 60))
257 # (this will be done in c++ later!)
259 return ''.join(strlist)
261 text = property(getText)
263 #===============================================================================
264 # the performant 'listfiller'-engine (plfe)
265 #===============================================================================
266 class ListFiller(Converter):
267 def __init__(self, arg):
268 Converter.__init__(self, arg)
269 # print "ListFiller-arg: ",arg
273 lut = self.source.lut
274 conv_args = self.converter_arguments
276 # now build a ["string", 1, "string", 2]-styled list, with indices into the
277 # list to avoid lookup of item name for each entry
279 for element in conv_args:
280 if isinstance(element, basestring):
281 lutlist.append((element, None))
282 elif isinstance(element, ListItem):
283 lutlist.append((lut[element.name], element.filternum))
284 elif isinstance(element, ListMacroItem):
285 lutlist.append((element.macrodict[element.macroname], None))
287 raise Exception("neither string, ListItem nor ListMacroItem")
289 # now, for the huge list, do:
291 append = strlist.append
293 for (element, filternum) in lutlist:
297 curitem = item[element]
307 append(str(curitem).replace("\\", "\\\\").replace("\n", "\\n").replace('"', '\\"'))
309 append(escape_xml(str(curitem)))
311 append(str(curitem).replace("%", "%25").replace("+", "%2B").replace('&', '%26').replace('?', '%3f').replace(' ', '+'))
313 append(quote(str(curitem)))
315 from time import localtime
316 time = int(float(curitem)) or 0
318 append("%02d:%02d" % (t.tm_hour, t.tm_min))
320 from time import localtime
321 time = int(float(curitem)) or 0
323 append("%d min" % (time / 60))
326 # (this will be done in c++ later!)
328 return ''.join(strlist)
330 text = property(getText)
332 #===============================================================================
335 # Handles the Content of a Web-Request
336 # It looks up the source, instantiates the Element and Calls the Converter
337 #===============================================================================
338 class webifHandler(ContentHandler):
339 def __init__(self, session, request):
343 self.session = session
345 self.request = request
348 def start_element(self, attrs):
351 wsource = attrs["source"]
353 path = wsource.split('.')
355 scr = self.screen.getRelatedScreen(path[0])
357 print "[webif.py] Parent Screen not found!"
361 source = scr.get(path[0])
363 if isinstance(source, ObsoleteSource):
364 # however, if we found an "obsolete source", issue warning, and resolve the real source.
365 print "WARNING: WEBIF '%s' USES OBSOLETE SOURCE '%s', USE '%s' INSTEAD!" % (name, wsource, source.new_source)
366 print "OBSOLETE SOURCE WILL BE REMOVED %s, PLEASE UPDATE!" % (source.removal_date)
367 if source.description:
368 print source.description
370 wsource = source.new_source
373 # otherwise, use that source.
376 self.source_id = str(attrs.get("id", wsource))
377 self.is_streaming = "streaming" in attrs
378 self.macro_name = attrs.get("macro") or None
380 def end_element(self):
381 # instatiate either a StreamingElement or a OneTimeElement, depending on what's required.
382 if not self.is_streaming:
383 if self.macro_name is None:
384 c = OneTimeElement(self.source_id)
386 c = MacroElement(self.source_id, self.macros, self.macro_name)
388 assert self.macro_name is None
389 c = StreamingElement(self.source_id)
391 c.connect(self.source)
393 self.screen.renderer.append(c)
396 def start_convert(self, attrs):
397 ctype = attrs["type"]
399 # TODO: we need something better here
400 if ctype[:4] == "web:": # for now
401 self.converter = eval(ctype[4:])
404 self.converter = my_import('.'.join(("Components", "Converter", ctype))).__dict__.get(ctype)
406 self.converter = my_import('.'.join(("Plugins", "Extensions", "WebInterface", "WebComponents", "Converter", ctype))).__dict__.get(ctype)
409 def end_convert(self):
410 if len(self.sub) == 1:
411 self.sub = self.sub[0]
412 c = self.converter(self.sub)
413 c.connect(self.source)
417 def parse_item(self, attrs):
419 filter = {"": 1, "javascript_escape": 2, "xml": 3, "uri": 4, "urlencode": 5, "time": 6, "minutes": 7}[attrs.get("filter", "")]
420 self.sub.append(ListItem(attrs["name"], filter))
422 assert "macro" in attrs, "e2:item must have a name= or macro= attribute!"
423 self.sub.append(ListMacroItem(self.macros, attrs["macro"]))
425 def startElement(self, name, attrs):
426 if name == "e2:screen":
427 self.screen = eval(attrs["name"])(self.session, self.request) # fixme
428 self.screens.append(self.screen)
431 if name[:3] == "e2:":
434 tag = '<' + name + ''.join([' %s="%s"' % x for x in attrs.items()]) + '>'
435 #tag = tag.encode('utf-8')
439 elif self.mode == 1: # expect "<e2:element>"
440 assert name == "e2:element", "found %s instead of e2:element" % name
441 self.start_element(attrs)
442 elif self.mode == 2: # expect "<e2:convert>"
443 if name[:3] == "e2:":
444 assert name == "e2:convert"
445 self.start_convert(attrs)
449 assert name == "e2:item", "found %s instead of e2:item!" % name
451 self.parse_item(attrs)
453 def endElement(self, name):
454 if name == "e2:screen":
458 tag = "</" + name + ">"
461 elif self.mode == 2 and name[:3] != "e2:":
463 elif self.mode == 2: # closed 'convert' -> sub
465 elif self.mode == 1: # closed 'element'
467 if name[:3] == "e2:":
470 def processingInstruction(self, target, data):
471 self.res.append('<?' + target + ' ' + data + '>')
473 def characters(self, ch):
474 ch = ch.encode('utf-8')
480 def startEntity(self, name):
481 self.res.append('&' + name + ';');
484 for screen in self.screens:
488 print "screen cleanup!"
489 for screen in self.screens:
494 #===============================================================================
497 # Creates the Handler for a Request and calls it
498 # Also ensures that the Handler is finished after the Request is done
499 #===============================================================================
500 def renderPage(request, path, session):
501 # read in the template, create required screens
502 # we don't have persistense yet.
503 # if we had, this first part would only be done once.
504 handler = webifHandler(session, request)
505 parser = make_parser()
506 parser.setFeature(feature_namespaces, 0)
507 parser.setContentHandler(handler)
508 parser.parse(open(util.sibpath(__file__, path)))
510 # by default, we have non-streaming pages
513 # first, apply "commands" (aka. URL argument)
514 for x in handler.res:
515 if isinstance(x, Element):
516 x.handleCommand(request.args)
520 # now, we have a list with static texts mixed
521 # with non-static Elements.
522 # flatten this list, write into the request.
523 for x in handler.res:
524 if isinstance(x, Element):
525 if isinstance(x, StreamingElement):
527 x.setRequest(request)
530 request.write(str(x))
532 # if we met a "StreamingElement", there is at least one
533 # element which wants to output data more than once,
534 # i.e. on host-originated changes.
535 # in this case, don't finish yet, don't cleanup yet,
536 # but instead do that when the client disconnects.
538 requestFinish(handler, request)
541 def requestFinishDeferred(nothing, handler, request):
542 from twisted.internet import reactor
543 reactor.callLater(0, requestFinish, handler, request)
545 d = request.notifyFinish()
547 d.addBoth( requestFinishDeferred, handler, request )
549 #===============================================================================
552 # This has to be/is called at the end of every ScreenPage-based Request
553 #===============================================================================
554 def requestFinish(handler, request):