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add some caching for static assets

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Jakob Ketterl 2019-05-09 16:12:05 +02:00
parent 56dcd00e82
commit 80d387743a
1 changed files with 23 additions and 8 deletions
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31
owrx/controllers.py
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@ -3,15 +3,21 @@ from owrx.websocket import WebSocketConnection
from owrx.config import PropertyManager from owrx.config import PropertyManager
from owrx.source import SpectrumThread, DspManager, CpuUsageThread from owrx.source import SpectrumThread, DspManager, CpuUsageThread
import json import json
import os
from datetime import datetime
class Controller(object): class Controller(object):
def __init__(self, handler, matches): def __init__(self, handler, matches):
self.handler = handler self.handler = handler
self.matches = matches self.matches = matches
def send_response(self, content, code = 200, content_type = "text/html"): def send_response(self, content, code = 200, content_type = "text/html", last_modified: datetime = None, max_age = None):
self.handler.send_response(code) self.handler.send_response(code)
if content_type is not None: if content_type is not None:
self.handler.send_header("Content-Type", content_type) self.handler.send_header("Content-Type", content_type)
if last_modified is not None:
self.handler.send_header("Last-Modified", last_modified.strftime("%a, %d %b %Y %H:%M:%S GMT"))
if max_age is not None:
self.handler.send_header("Cache-Control", "max-age: {0}".format(max_age))
self.handler.end_headers() self.handler.end_headers()
if (type(content) == str): if (type(content) == str):
content = content.encode() content = content.encode()
@ -27,25 +33,34 @@ class StatusController(Controller):
def handle_request(self): def handle_request(self):
self.send_response("you have reached the status page!") self.send_response("you have reached the status page!")
class IndexController(Controller):
def handle_request(self):
self.render_template("index.wrx")
class AssetsController(Controller): class AssetsController(Controller):
def serve_file(self, file): def serve_file(self, file, content_type = None):
try: try:
modified = datetime.fromtimestamp(os.path.getmtime('htdocs/' + file))
if "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")
if modified <= client_modified:
self.send_response("", code = 304)
return
f = open('htdocs/' + file, 'rb') f = open('htdocs/' + file, 'rb')
data = f.read() data = f.read()
f.close() f.close()
(content_type, encoding) = mimetypes.MimeTypes().guess_type(file) if content_type is None:
self.send_response(data, content_type = content_type) (content_type, encoding) = mimetypes.MimeTypes().guess_type(file)
self.send_response(data, content_type = content_type, last_modified = modified, max_age = 3600)
except FileNotFoundError: except FileNotFoundError:
self.send_response("file not found", code = 404) self.send_response("file not found", code = 404)
def handle_request(self): def handle_request(self):
filename = self.matches.group(1) filename = self.matches.group(1)
self.serve_file(filename) self.serve_file(filename)
class IndexController(AssetsController):
def handle_request(self):
self.serve_file("index.wrx", "text/html")
class OpenWebRxClient(object): class OpenWebRxClient(object):
def __init__(self, conn): def __init__(self, conn):
self.conn = conn self.conn = conn