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

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<script type="text/x-red" data-template-name="http request">
    <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>
    </div>
    <div class="form-row">
        <label for="node-input-url"><i class="fa fa-globe"></i> <span data-i18n="httpin.label.url"></span></label>
        <div id="node-input-url" contenteditable="true" placeholder="http://"></div>
    </div>

    <div class="form-row">
        <input type="checkbox" id="node-input-usetls" style="display: inline-block; width: auto; vertical-align: top;">
        <label for="node-input-usetls" style="width: auto" data-i18n="httpin.use-tls"></label>
        <div id="node-row-tls" class="hide">
            <label style="width: auto; margin-left: 20px; margin-right: 10px;" for="node-input-tls"><span data-i18n="httpin.tls-config"></span></label><input type="text" style="width: 300px" id="node-input-tls">
        </div>
    </div>

    <div class="form-row">
        <input type="checkbox" id="node-input-useAuth" style="display: inline-block; width: auto; vertical-align: top;">
        <label for="node-input-useAuth" style="width: 70%;"><span data-i18n="httpin.basicauth"></span></label>
        <div style="margin-left: 20px" class="node-input-useAuth-row hide">
            <div class="form-row">
                <label for="node-input-user"><i class="fa fa-user"></i> <span data-i18n="common.label.username"></span></label>
                <input type="text" id="node-input-user">
            </div>
            <div class="form-row">
                <label for="node-input-password"><i class="fa fa-lock"></i> <span data-i18n="common.label.password"></span></label>
                <input type="password" id="node-input-password">
            </div>
        </div>
    </div>


    <div class="form-row">
        <label for="node-input-ret"><i class="fa fa-arrow-left"></i> <span data-i18n="httpin.label.return"></span></label>
        <select type="text" id="node-input-ret" style="width:70%;">
        <option value="txt" data-i18n="httpin.utf8"></option>
        <option value="bin" data-i18n="httpin.binary"></option>
        <option value="obj" data-i18n="httpin.json"></option>
        </select>
    </div>
    <div class="form-row">
        <label for="node-input-name"><i class="fa fa-tag"></i> <span data-i18n="common.label.name"></span></label>
        <input type="text" id="node-input-name" data-i18n="[placeholder]common.label.name">
    </div>
    <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>Provides a node for making http requests.</p>
    <p>The URL and HTTP method can be configured in the node, if they are left blank they should be set in an incoming message on <code>msg.url</code> and <code>msg.method</code>:</p>
    <ul>
        <li><code>url</code>, if set, is used as the url of the request. Must start with http: or https:</li>
        <li><code>method</code>, if set, is used as 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> (default: GET)</li>
        <li><code>headers</code>, if set, should be an object containing field/value
        pairs to be added as request headers</li>
        <li><code>payload</code> is sent as the body of the request</li>
    </ul>
    <p>When configured within the node, the URL property can contain <a href="http://mustache.github.io/mustache.5.html" target="_new">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>
    The output message contains the following properties:
    <ul>
        <li><code>payload</code> is the body of the response</li>
        <li><code>statusCode</code> is the status code of the response, or the error code if the request could not be completed</li>
        <li><code>headers</code> is an object containing the response headers</li>
    </ul>
    <p><b>Note</b>: If you need to configure a proxy please add <b>http_proxy=...</b> to your environment variables and restart Node-RED.</p>
</script>

<script type="text/javascript">
    RED.nodes.registerType('http request',{
        category: 'function',
        color:"rgb(231, 231, 174)",
        defaults: {
            name: {value:""},
            method:{value:"GET"},
            ret: {value:"txt"},
            url:{value:"",format:"url"},
            tls: {type:"tls-config",required: false}
        },
        credentials: {
            user: {type:"text"},
            password: {type: "password"}
        },
        inputs:1,
        outputs:1,
        icon: "white-globe.png",
        label: function() {
            return this.name||this._("httpin.httpreq");
        },
        labelStyle: function() {
            return this.name?"node_label_italic":"";
        },
        oneditprepare: function() {
            $("#node-input-useAuth").change(function() {
                if ($(this).is(":checked")) {
                    $(".node-input-useAuth-row").show();
                } else {
                    $(".node-input-useAuth-row").hide();
                    $('#node-input-user').val('');
                    $('#node-input-password').val('');
                }
            });
            if (this.credentials.user || this.credentials.has_password) {
                $('#node-input-useAuth').prop('checked', true);
            } else {
                $('#node-input-useAuth').prop('checked', false);
            }
            $("#node-input-useAuth").change();

            function updateTLSOptions() {
                if ($("#node-input-usetls").is(':checked')) {
                    $("#node-row-tls").show();
                } else {
                    $("#node-row-tls").hide();
                }
            }
            if (this.tls) {
                $('#node-input-usetls').prop('checked', true);
            } else {
                $('#node-input-usetls').prop('checked', false);
            }
            updateTLSOptions();
            $("#node-input-usetls").on("click",function() {
                updateTLSOptions();
            });
            $("#node-input-ret").change(function() {
                if ($("#node-input-ret").val() === "obj") {
                    $("#tip-json").show();
                } else {
                    $("#tip-json").hide();
                }
            });
        },
        oneditsave: function() {
            if (!$("#node-input-usetls").is(':checked')) {
                $("#node-input-tls").val("_ADD_");
            }
        }
    });
</script>