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annotate libervia/pages/_browser/bridge.py @ 1466:cff720e26089

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pages (blog/view): activate pagination when a single item is shown: `previous_page_url` and `next_page_url` are set when `item_id` is used. For now, they are both activated even if there is no item before or after, as it would request to make extra request to check it. This may be improved in 0.9 by using internal cache. fix 399
author Goffi <goffi@goffi.org>
date Thu, 30 Sep 2021 17:04:22 +0200
parents 8998f01088ac
children b28025a7cc28
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999dccf0093e browser: new bridge module to access restricted bridge from browser
Goffi <goffi@goffi.org>
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1 from browser import window
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2 import javascript
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3
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4
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5 class Bridge:
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6
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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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8998f01088ac browser (bridge): handle case where `callback` or `errback` is None
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13 if callback is not None:
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14 if ret is None:
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15 callback()
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16 else:
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17 callback(ret)
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18 elif xhr.status == 502:
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19 # PROXY_ERROR is used for bridge error
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20 ret = javascript.JSON.parse(xhr.response)
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21 if errback is not None:
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22 errback(ret)
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23 else:
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24 print(f"bridge called failed: code: {xhr.response}, text: {xhr.statusText}")
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25 if errback is not None:
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26 errback({"fullname": "InternalError", "message": xhr.statusText})
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27
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28 def call(self, method_name, *args, callback, errback, **kwargs):
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29 xhr = window.XMLHttpRequest.new()
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30 xhr.bind('load', lambda ev: self.on_load(xhr, ev, callback, errback))
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31 xhr.bind('error', lambda ev: errback(
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32 {"fullname": "ConnectionError", "message": xhr.statusText}))
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33 xhr.open("POST", f"/_bridge/{method_name}", True)
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34 data = javascript.JSON.stringify({
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35 "args": args,
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36 "kwargs": kwargs,
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37 })
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38 xhr.setRequestHeader('X-Csrf-Token', window.csrf_token)
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39 xhr.send(data)