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<a href="#setwebhookinfoandstartlistenwebhooks" class="md-nav__link">
setWebhookInfoAndStartListenWebhooks
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<a href="#startlistenwebhooks" class="md-nav__link">
startListenWebhooks
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<a href="#extensions-includewebhookhandlinginroute-and-includewebhookhandlinginroutewithflows" class="md-nav__link">
Extensions includeWebhookHandlingInRoute and includeWebhookHandlingInRouteWithFlows
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See also
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<h1 id="webhooks">Webhooks<a class="headerlink" href="#webhooks" title="Permanent link">&para;</a></h1>
<p>In telegram bot API there is an opportunity to get updates via <a href="https://core.telegram.org/bots/webhooks">webhooks</a>. In this case you will be able to retrieve updates without making additional requests. Most of currently available methods for webhooks are working on <a href="https://ktor.io/servers/index.html">ktor server</a> for JVM. Currently, next ways are available for using for webhooks:</p>
<ul>
<li><code>Route#includeWebhookHandlingInRoute</code> for <a href="https://ktor.io/servers/index.html">ktor server</a></li>
<li><code>Route#includeWebhookHandlingInRouteWithFlows</code> </li>
<li><code>startListenWebhooks</code></li>
<li><code>RequestsExecutor#setWebhookInfoAndStartListenWebhooks</code></li>
</ul>
<h3 id="setwebhookinfoandstartlistenwebhooks"><code>setWebhookInfoAndStartListenWebhooks</code><a class="headerlink" href="#setwebhookinfoandstartlistenwebhooks" title="Permanent link">&para;</a></h3>
<p>It is the most common way to set updates webhooks and start listening of them. Example:</p>
<pre><code class="language-kotlin">val bot = telegramBot(TOKEN)
val filter = flowsUpdatesFilter {
// ...
}
bot.setWebhookInfoAndStartListenWebhooks(
8080, // listening port. It is required for cases when your server hidden by some proxy or other system like Heroku
CIO, // default ktor server engine. It is recommended to replace it with something like `Netty`. More info about engines here: https://ktor.io/servers/configuration.html
SetWebhook(
&quot;address.com/webhook_route&quot;,
File(&quot;/path/to/certificate&quot;).toInputFile(), // certificate file. More info here: https://core.telegram.org/bots/webhooks#a-certificate-where-do-i-get-one-and-how
40, // max allowed updates, by default is null
filter.allowedUpdates
),
{
it.printStackTrace() // optional handling of exceptions
},
&quot;0.0.0.0&quot;, // listening host which will be used to bind by server
&quot;subroute&quot;, // Optional subroute, if null - will listen root of address
WebhookPrivateKeyConfig( // optional config of private key. It will be installed in server to use TLS with custom certificate. More info here: https://core.telegram.org/bots/webhooks#a-certificate-where-do-i-get-one-and-how
&quot;/path/to/keystore.jks&quot;,
&quot;KeystorePassword&quot;,
&quot;Keystore key alias name&quot;,
&quot;KeystoreAliasPassword&quot;
),
scope, // Kotlin coroutine scope for internal transforming of media groups
filter.asUpdateReceiver
)
</code></pre>
<p>If you will use previous example, ktor server will bind and listen url <code>0.0.0.0:8080/subroute</code> and telegram will send requests to address <code>address.com/webhook_route</code> with custom certificate. Alternative variant will use the other <code>SetWebhook</code> request variant:</p>
<pre><code class="language-kotlin">SetWebhook(
&quot;address.com/webhook_route&quot;,
&quot;some_file_bot_id&quot;.toInputFile(),
40, // max allowed updates, by default is null
filter.allowedUpdates
)
</code></pre>
<p>As a result, request <code>SetWebhook</code> will be executed and after this server will start its working and handling of updates.</p>
<h3 id="startlistenwebhooks"><code>startListenWebhooks</code><a class="headerlink" href="#startlistenwebhooks" title="Permanent link">&para;</a></h3>
<p>This function is working almost exactly like previous example, but this one will not set up webhook info in telegram:</p>
<pre><code class="language-kotlin">val filter = flowsUpdatesFilter {
// ...
}
startListenWebhooks(
8080, // listening port. It is required for cases when your server hidden by some proxy or other system like Heroku
CIO, // default ktor server engine. It is recommended to replace it with something like `Netty`. More info about engines here: https://ktor.io/servers/configuration.html
{
it.printStackTrace() // optional handling of exceptions
},
&quot;0.0.0.0&quot;, // listening host which will be used to bind by server
&quot;subroute&quot;, // Optional subroute, if null - will listen root of address
WebhookPrivateKeyConfig( // optional config of private key. It will be installed in server to use TLS with custom certificate. More info here: https://core.telegram.org/bots/webhooks#a-certificate-where-do-i-get-one-and-how
&quot;/path/to/keystore.jks&quot;,
&quot;KeystorePassword&quot;,
&quot;Keystore key alias name&quot;,
&quot;KeystoreAliasPassword&quot;
),
scope, // Kotlin coroutine scope for internal transforming of media groups
filter.asUpdateReceiver
)
</code></pre>
<p>The result will be the same as in previous example: server will start its working and handling of updates on <code>0.0.0.0:8080/subroute</code>. The difference here is that in case if this bot must not answer or send some requiests - it will not be necessary to create bot for receiving of updates.</p>
<h3 id="extensions-includewebhookhandlinginroute-and-includewebhookhandlinginroutewithflows">Extensions <code>includeWebhookHandlingInRoute</code> and <code>includeWebhookHandlingInRouteWithFlows</code><a class="headerlink" href="#extensions-includewebhookhandlinginroute-and-includewebhookhandlinginroutewithflows" title="Permanent link">&para;</a></h3>
<p>For these extensions you will need to start your server manualy. In common case it will look like:</p>
<pre><code class="language-kotlin">val scope = CoroutineScope(Dispatchers.Default)
val filter = flowsUpdatesFilter {
// ...
}
val environment = applicationEngineEnvironment {
module {
routing {
includeWebhookHandlingInRoute(
scope,
{
it.printStackTrace()
},
filter.asUpdateReceiver
)
}
}
connector {
host = &quot;0.0.0.0&quot;
port = 8080
}
}
embeddedServer(CIO, environment).start(true) // will start server and wait its stoping
</code></pre>
<p>In the example above server will started and binded for listening on <code>0.0.0.0:8080</code>.</p>
<h2 id="see-also">See also<a class="headerlink" href="#see-also" title="Permanent link">&para;</a></h2>
<ul>
<li><a href="updates-filters.html">Updates filters</a></li>
<li><a href="long-polling.html">Long polling</a></li>
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