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Ilya Kantor 2019-07-28 15:42:37 +03:00
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5-network/11-websocket/article.md
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@ -75,7 +75,7 @@ When `new WebSocket(url)` is created, it starts connecting immediately.
During the connection the browser (using headers) asks the server: "Do you support Websocket?" And if the server replies "yes", then the talk continues in WebSocket protocol, which is not HTTP at all.
![](websocket-handshake.png)
![](websocket-handshake.svg)
Here's an example of browser request for `new WebSocket("wss://javascript.info/chat")`.

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5-network/11-websocket/websocket-handshake.png
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5-network/11-websocket/websocket-handshake.svg Normal file
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@ -0,0 +1,34 @@
<?xml version="1.0" encoding="UTF-8"?>
<svg width="429px" height="404px" viewBox="0 0 429 404" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<!-- Generator: sketchtool 55.2 (78181) - https://sketchapp.com -->
<title>websocket-handshake.svg</title>
<desc>Created with sketchtool.</desc>
<g id="network" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
<g id="websocket-handshake.svg">
<rect id="Rectangle-227" stroke="#E8C48E" stroke-width="2" fill="#FFF9EB" x="2" y="16" width="128" height="64"></rect>
<text id="Browser" font-family="OpenSans-Regular, Open Sans" font-size="14" font-weight="normal" fill="#8A704D">
<tspan x="40" y="49">Browser</tspan>
</text>
<rect id="Rectangle-228" stroke="#E8C48E" stroke-width="2" fill="#FFF9EB" x="249" y="16" width="128" height="64"></rect>
<text id="Server" font-family="OpenSans-Regular, Open Sans" font-size="14" font-weight="normal" fill="#8A704D">
<tspan x="291" y="49">Server</tspan>
</text>
<path d="M67,81 L67,331.5" id="Line" stroke="#979797" stroke-linecap="square"></path>
<path d="M314,81 L314,332.5" id="Line" stroke="#979797" stroke-linecap="square"></path>
<path id="Line" d="M299,141 L68,141 L68,139 L299,139 L299,133 L313,140 L299,147 L299,141 Z" fill="#EE6B47" fill-rule="nonzero"></path>
<text id="HTTP-request-&quot;Hey,-s" font-family="OpenSans-Regular, Open Sans" font-size="14" font-weight="normal" line-spacing="22" fill="#8A704D">
<tspan x="142.515137" y="132">HTTP-request</tspan>
<tspan x="74.3745117" y="154">"Hey, server, let's talk WebSocket?"</tspan>
</text>
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<text id="HTTP-response-&quot;Okay!" font-family="OpenSans-Regular, Open Sans" font-size="14" font-weight="normal" line-spacing="22" fill="#8A704D">
<tspan x="137.418945" y="204">HTTP-response</tspan>
<tspan x="162.97168" y="226">"Okay!"</tspan>
</text>
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<text id="WebSocket-protocol" font-family="OpenSans-Regular, Open Sans" font-size="14" font-weight="normal" fill="#8A704D">
<tspan x="122.524414" y="272">WebSocket protocol</tspan>
</text>
</g>
</g>
</svg>
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5-network/11-websocket/websocket-handshake@2x.png
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