from . import Controller from owrx.config import Config from datetime import datetime, timezone import mimetypes import os import pkg_resources from abc import ABCMeta, abstractmethod import gzip import logging logger = logging.getLogger(__name__) class GzipMixin(object): def send_response(self, content, headers=None, content_type="text/html", *args, **kwargs): if self.zipable(content_type) and "accept-encoding" in self.request.headers: accepted = [s.strip().lower() for s in self.request.headers['accept-encoding'].split(",")] if "gzip" in accepted: if type(content) == str: content = content.encode() content = self.gzip(content) if headers is None: headers = {} headers["Content-Encoding"] = "gzip" super().send_response(content, headers=headers, content_type=content_type, *args, **kwargs) def zipable(self, content_type): types = [ "application/javascript", "text/css", "text/html" ] return content_type in types def gzip(self, content): return gzip.compress(content) class ModificationAwareController(Controller, metaclass=ABCMeta): @abstractmethod def getModified(self, file): pass def wasModified(self, file): try: modified = self.getModified(file).replace(microsecond=0) if modified is not None and "If-Modified-Since" in self.handler.headers: client_modified = datetime.strptime( self.handler.headers["If-Modified-Since"], "%a, %d %b %Y %H:%M:%S %Z" ).replace(tzinfo=timezone.utc) if modified <= client_modified: return False except FileNotFoundError: pass return True class AssetsController(GzipMixin, ModificationAwareController, metaclass=ABCMeta): def getModified(self, file): return datetime.fromtimestamp(os.path.getmtime(self.getFilePath(file)), timezone.utc) def openFile(self, file): return open(self.getFilePath(file), "rb") @abstractmethod def getFilePath(self, file): pass def serve_file(self, file, content_type=None): try: modified = self.getModified(file) if not self.wasModified(file): self.send_response("", code=304) return f = self.openFile(file) data = f.read() f.close() if content_type is None: (content_type, encoding) = mimetypes.MimeTypes().guess_type(file) self.send_response(data, content_type=content_type, last_modified=modified, max_age=3600) except FileNotFoundError: self.send_response("file not found", code=404) def indexAction(self): filename = self.request.matches.group(1) self.serve_file(filename) class OwrxAssetsController(AssetsController): def getFilePath(self, file): return pkg_resources.resource_filename("htdocs", file) class AprsSymbolsController(AssetsController): def __init__(self, handler, request, options): pm = Config.get() path = pm["aprs_symbols_path"] if not path.endswith("/"): path += "/" self.path = path super().__init__(handler, request, options) def getFilePath(self, file): return self.path + file class CompiledAssetsController(GzipMixin, ModificationAwareController): profiles = { "receiver.js": [ "lib/chroma.min.js", "openwebrx.js", "lib/jquery-3.2.1.min.js", "lib/jquery.nanoscroller.min.js", "lib/Header.js", "lib/Demodulator.js", "lib/DemodulatorPanel.js", "lib/BookmarkBar.js", "lib/BookmarkDialog.js", "lib/AudioEngine.js", "lib/ProgressBar.js", "lib/Measurement.js", "lib/FrequencyDisplay.js", "lib/Js8Threads.js", "lib/Modes.js", ], "map.js": [ "lib/jquery-3.2.1.min.js", "lib/chroma.min.js", "lib/Header.js", "map.js", ], "settings.js": [ "lib/jquery-3.2.1.min.js", "lib/Header.js", "lib/settings/Input.js", "lib/settings/SdrDevice.js", "settings.js", ] } def indexAction(self): profileName = self.request.matches.group(1) if profileName not in CompiledAssetsController.profiles: self.send_response("profile not found", code=404) return files = CompiledAssetsController.profiles[profileName] files = [pkg_resources.resource_filename("htdocs", f) for f in files] modified = self.getModified(files) if not self.wasModified(files): self.send_response("", code=304) return contents = [self.getContents(f) for f in files] (content_type, encoding) = mimetypes.MimeTypes().guess_type(profileName) self.send_response("\n".join(contents), content_type=content_type, last_modified=modified, max_age=3600) def getContents(self, file): with open(file) as f: return f.read() def getModified(self, files): modified = [os.path.getmtime(f) for f in files] return datetime.fromtimestamp(max(*modified), timezone.utc)