his case the request URL may be different than the initial request URL.
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<h4>protocol</h4>
<pre>public&nbsp;<a href="../../../../com/lark/oapi/okhttp/Protocol.html" title="com.lark.oapi.okhttp中的枚举">Protocol</a>&nbsp;protocol()</pre>
<div class="block">Returns the HTTP protocol, such as <a href="../../../../com/lark/oapi/okhttp/Protocol.html#HTTP_1_1"><code>Protocol.HTTP_1_1</code></a> or <a hr