node-red/nodes/core/io/21-httprequest.html

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    <div class="form-row">
        <label for="node-input-method"><i class="fa fa-tasks"></i> <span data-i18n="httpin.label.method"></span></label>
        <select type="text" id="node-input-method" style="width:70%;">
        <option value="GET">GET</option>
        <option value="POST">POST</option>
        <option value="PUT">PUT</option>
        <option value="DELETE">DELETE</option>
        <option value="use" data-i18n="httpin.setby"></option>
        </select>
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    <div class="form-row">
        <label for="node-input-url"><i class="fa fa-globe"></i> <span data-i18n="httpin.label.url"></span></label>
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    <div class="form-row">
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        <option value="txt" data-i18n="httpin.utf8"></option>
        <option value="bin" data-i18n="httpin.binary"></option>
        <option value="obj" data-i18n="httpin.json"></option>
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    <div class="form-tips" id="tip-json" hidden><span data-i18n="httpin.tip.req"></span></div>
</script>

<script type="text/x-red" data-help-name="http request">
    <p>Sends HTTP requests and returns the response.</p>

    <h3>Inputs</h3>
    <dl class="message-properties">
        <dt class="optional">url <span class="property-type">string</span></dt>
        <dd>If not configured in the node, this optional property sets the url of the request.</dd>
        <dt class="optional">method <span class="property-type">string</span></dt>
        <dd>If not configured in the node, this optional property sets the HTTP method of the request.
            Must be one of <code>GET</code>, <code>PUT</code>, <code>POST</code>, <code>PATCH</code> or <code>DELETE</code>.</dd>
        <dt class="optional">headers <span class="property-type">object</span></dt>
        <dd>Sets the HTTP headers of the request.</dd>
        <dt class="optional">payload</dt>
        <dd>Sent as the body of the request.</dd>
    </dl>
    <h3>Outputs</h3>
    <dl class="message-properties">
        <dt>payload <span class="property-type">string | object | buffer</span></dt>
        <dd>The body of the response. The node can be configured to return the body
             as a string, attempt to parse it as a JSON string or leave it as a
             binary buffer.</dd>
        <dt>statusCode <span class="property-type">number</span></dt>
        <dd>The status code of the response, or the error code if the request could not be completed.</dd>
        <dt>headers <span class="property-type">object</span></dt>
        <dd>An object containing the response headers.</dd>
        <dt>responseUrl <span class="property-type">string</span></dt>
        <dd>In case any redirects occurred while processing the request, this property is the final redirected url.
            Otherwise, the url of the original request.</dd>
    </dl>
    <h3>Details</h3>
    <p>When configured within the node, the URL property can contain <a href="http://mustache.github.io/mustache.5.html" target="_blank">mustache-style</a> tags. These allow the
    url to be constructed using values of the incoming message. For example, if the url is set to
    <code>example.com/{{{topic}}}</code>, it will have the value of <code>msg.topic</code> automatically inserted.
    Using {{{...}}} prevents mustache from escaping characters like / & etc.</p>
    <p><b>Note</b>: If running behind a proxy, the standard <code>http_proxy=...</code> environment variable should be set and Node-RED restarted.</p>
</script>

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