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comparison libervia/pages/_browser/bridge.py @ 1297:999dccf0093e

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browser: new bridge module to access restricted bridge from browser
author Goffi <goffi@goffi.org>
date Fri, 19 Jun 2020 16:47:51 +0200
parents
children 8998f01088ac
comparison
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1296:b1215347b5c3 1297:999dccf0093e
1 from browser import window
2 import javascript
3
4
5 class Bridge:
6
7 def __getattr__(self, attr):
8 return lambda *args, **kwargs: self.call(attr, *args, **kwargs)
9
10 def on_load(self, xhr, ev, callback, errback):
11 if xhr.status == 200:
12 ret = javascript.JSON.parse(xhr.response)
13 if ret is None:
14 callback()
15 else:
16 callback(ret)
17 elif xhr.status == 502:
18 # PROXY_ERROR is used for bridge error
19 ret = javascript.JSON.parse(xhr.response)
20 errback(ret)
21 else:
22 print(f"bridge called failed: code: {xhr.response}, text: {xhr.statusText}")
23 errback({"fullname": "InternalError", "message": xhr.statusText})
24
25 def call(self, method_name, *args, callback, errback, **kwargs):
26 xhr = window.XMLHttpRequest.new()
27 xhr.bind('load', lambda ev: self.on_load(xhr, ev, callback, errback))
28 xhr.bind('error', lambda ev: errback(
29 {"fullname": "ConnectionError", "message": xhr.statusText}))
30 xhr.open("POST", f"/_bridge/{method_name}", True)
31 data = javascript.JSON.stringify({
32 "args": args,
33 "kwargs": kwargs,
34 })
35 xhr.setRequestHeader('X-Csrf-Token', window.csrf_token)
36 xhr.send(data)