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