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<a href="googleapiclient-module.html">Package&nbsp;googleapiclient</a> ::
Module&nbsp;channel
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<h1 class="epydoc">Module channel</h1><p class="nomargin-top"><span class="codelink"><a href="googleapiclient.channel-pysrc.html">source&nbsp;code</a></span></p>
<pre class="literalblock">
Channel notifications support.
Classes and functions to support channel subscriptions and notifications
on those channels.
Notes:
- This code is based on experimental APIs and is subject to change.
- Notification does not do deduplication of notification ids, that's up to
the receiver.
- Storing the Channel between calls is up to the caller.
Example setting up a channel:
# Create a new channel that gets notifications via webhook.
channel = new_webhook_channel(&quot;https://example.com/my_web_hook&quot;)
# Store the channel, keyed by 'channel.id'. Store it before calling the
# watch method because notifications may start arriving before the watch
# method returns.
...
resp = service.objects().watchAll(
bucket=&quot;some_bucket_id&quot;, body=channel.body()).execute()
channel.update(resp)
# Store the channel, keyed by 'channel.id'. Store it after being updated
# since the resource_id value will now be correct, and that's needed to
# stop a subscription.
...
An example Webhook implementation using webapp2. Note that webapp2 puts
headers in a case insensitive dictionary, as headers aren't guaranteed to
always be upper case.
id = self.request.headers[X_GOOG_CHANNEL_ID]
# Retrieve the channel by id.
channel = ...
# Parse notification from the headers, including validating the id.
n = notification_from_headers(channel, self.request.headers)
# Do app specific stuff with the notification here.
if n.resource_state == 'sync':
# Code to handle sync state.
elif n.resource_state == 'exists':
# Code to handle the exists state.
elif n.resource_state == 'not_exists':
# Code to handle the not exists state.
Example of unsubscribing.
service.channels().stop(channel.body()).execute()
</pre>
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<span class="summary-type">&nbsp;</span>
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<a href="googleapiclient.channel.Notification-class.html" class="summary-name">Notification</a><br />
A Notification from a Channel.
</td>
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<span class="summary-type">&nbsp;</span>
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<a href="googleapiclient.channel.Channel-class.html" class="summary-name">Channel</a><br />
A Channel for notifications.
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<td><span class="summary-sig"><a name="_upper_header_keys"></a><span class="summary-sig-name">_upper_header_keys</span>(<span class="summary-sig-arg">headers</span>)</span></td>
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<span class="codelink"><a href="googleapiclient.channel-pysrc.html#_upper_header_keys">source&nbsp;code</a></span>
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<span class="summary-type">&nbsp;</span>
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<td><span class="summary-sig"><a href="googleapiclient.channel-module.html#notification_from_headers" class="summary-sig-name">notification_from_headers</a>(<span class="summary-sig-arg">channel</span>,
<span class="summary-sig-arg">headers</span>)</span><br />
Parse a notification from the webhook request headers, validate
the notification, and return a Notification object.</td>
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<span class="codelink"><a href="googleapiclient.channel-pysrc.html#notification_from_headers">source&nbsp;code</a></span>
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<span class="summary-type">&nbsp;</span>
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<td><span class="summary-sig"><a href="googleapiclient.channel-module.html#new_webhook_channel" class="summary-sig-name">new_webhook_channel</a>(<span class="summary-sig-arg">*args</span>,
<span class="summary-sig-arg">**kwargs</span>)</span><br />
Create a new webhook Channel.</td>
<td align="right" valign="top">
<span class="codelink"><a href="googleapiclient.channel-pysrc.html#new_webhook_channel">source&nbsp;code</a></span>
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<span class="summary-type">&nbsp;</span>
</td><td class="summary">
<a name="EPOCH"></a><span class="summary-name">EPOCH</span> = <code title="datetime.datetime(1970, 1, 1, 0, 0)">datetime.datetime(1970, 1, 1, 0, 0)</code>
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<span class="summary-type">&nbsp;</span>
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<a href="googleapiclient.channel-module.html#CHANNEL_PARAMS" class="summary-name">CHANNEL_PARAMS</a> = <code title="{'address': 'address',
'expiration': 'expiration',
'id': 'id',
'params': 'params',
'resourceId': 'resource_id',
'resourceUri': 'resource_uri',
'token': 'token',
'type': 'type'}"><code class="variable-group">{</code><code class="variable-quote">'</code><code class="variable-string">address</code><code class="variable-quote">'</code><code class="variable-op">: </code><code class="variable-quote">'</code><code class="variable-string">address</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">expiration</code><code class="variable-quote">'</code><code class="variable-op">: </code><code class="variable-quote">'</code><code class="variable-string">expirat</code><code class="variable-ellipsis">...</code></code>
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<span class="summary-type">&nbsp;</span>
</td><td class="summary">
<a name="X_GOOG_CHANNEL_ID"></a><span class="summary-name">X_GOOG_CHANNEL_ID</span> = <code title="'X-GOOG-CHANNEL-ID'"><code class="variable-quote">'</code><code class="variable-string">X-GOOG-CHANNEL-ID</code><code class="variable-quote">'</code></code>
</td>
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<span class="summary-type">&nbsp;</span>
</td><td class="summary">
<a name="X_GOOG_MESSAGE_NUMBER"></a><span class="summary-name">X_GOOG_MESSAGE_NUMBER</span> = <code title="'X-GOOG-MESSAGE-NUMBER'"><code class="variable-quote">'</code><code class="variable-string">X-GOOG-MESSAGE-NUMBER</code><code class="variable-quote">'</code></code>
</td>
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<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type">&nbsp;</span>
</td><td class="summary">
<a name="X_GOOG_RESOURCE_STATE"></a><span class="summary-name">X_GOOG_RESOURCE_STATE</span> = <code title="'X-GOOG-RESOURCE-STATE'"><code class="variable-quote">'</code><code class="variable-string">X-GOOG-RESOURCE-STATE</code><code class="variable-quote">'</code></code>
</td>
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<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type">&nbsp;</span>
</td><td class="summary">
<a name="X_GOOG_RESOURCE_URI"></a><span class="summary-name">X_GOOG_RESOURCE_URI</span> = <code title="'X-GOOG-RESOURCE-URI'"><code class="variable-quote">'</code><code class="variable-string">X-GOOG-RESOURCE-URI</code><code class="variable-quote">'</code></code>
</td>
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<span class="summary-type">&nbsp;</span>
</td><td class="summary">
<a name="X_GOOG_RESOURCE_ID"></a><span class="summary-name">X_GOOG_RESOURCE_ID</span> = <code title="'X-GOOG-RESOURCE-ID'"><code class="variable-quote">'</code><code class="variable-string">X-GOOG-RESOURCE-ID</code><code class="variable-quote">'</code></code>
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<span class="summary-type">&nbsp;</span>
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<a name="__package__"></a><span class="summary-name">__package__</span> = <code title="None">None</code>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">notification_from_headers</span>(<span class="sig-arg">channel</span>,
<span class="sig-arg">headers</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="googleapiclient.channel-pysrc.html#notification_from_headers">source&nbsp;code</a></span>&nbsp;
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<pre class="literalblock">
Parse a notification from the webhook request headers, validate
the notification, and return a Notification object.
Args:
channel: Channel, The channel that the notification is associated with.
headers: dict, A dictionary like object that contains the request headers
from the webhook HTTP request.
Returns:
A Notification object.
Raises:
errors.InvalidNotificationError if the notification is invalid.
ValueError if the X-GOOG-MESSAGE-NUMBER can't be converted to an int.
</pre>
<dl class="fields">
</dl>
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<a name="new_webhook_channel"></a>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">new_webhook_channel</span>(<span class="sig-arg">*args</span>,
<span class="sig-arg">**kwargs</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="googleapiclient.channel-pysrc.html#new_webhook_channel">source&nbsp;code</a></span>&nbsp;
</td>
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<pre class="literalblock">
Create a new webhook Channel.
Args:
url: str, URL to post notifications to.
token: str, An arbitrary string associated with the channel that
is delivered to the target address with each notification delivered
over this channel.
expiration: datetime.datetime, A time in the future when the channel
should expire. Can also be None if the subscription should use the
default expiration. Note that different services may have different
limits on how long a subscription lasts. Check the response from the
watch() method to see the value the service has set for an expiration
time.
params: dict, Extra parameters to pass on channel creation. Currently
not used for webhook channels.
</pre>
<dl class="fields">
<dt>Decorators:</dt>
<dd><ul class="nomargin-top">
<li><code>@util.positional(2)</code></li>
</ul></dd>
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<a name="CHANNEL_PARAMS"></a>
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<h3 class="epydoc">CHANNEL_PARAMS</h3>
<dl class="fields">
</dl>
<dl class="fields">
<dt>Value:</dt>
<dd><table><tr><td><pre class="variable">
<code class="variable-group">{</code><code class="variable-quote">'</code><code class="variable-string">address</code><code class="variable-quote">'</code><code class="variable-op">: </code><code class="variable-quote">'</code><code class="variable-string">address</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">expiration</code><code class="variable-quote">'</code><code class="variable-op">: </code><code class="variable-quote">'</code><code class="variable-string">expiration</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">id</code><code class="variable-quote">'</code><code class="variable-op">: </code><code class="variable-quote">'</code><code class="variable-string">id</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">params</code><code class="variable-quote">'</code><code class="variable-op">: </code><code class="variable-quote">'</code><code class="variable-string">params</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">resourceId</code><code class="variable-quote">'</code><code class="variable-op">: </code><code class="variable-quote">'</code><code class="variable-string">resource_id</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">resourceUri</code><code class="variable-quote">'</code><code class="variable-op">: </code><code class="variable-quote">'</code><code class="variable-string">resource_uri</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">token</code><code class="variable-quote">'</code><code class="variable-op">: </code><code class="variable-quote">'</code><code class="variable-string">token</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">type</code><code class="variable-quote">'</code><code class="variable-op">: </code><code class="variable-quote">'</code><code class="variable-string">type</code><code class="variable-quote">'</code><code class="variable-group">}</code>
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