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

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<script type="text/x-red" data-template-name="http in">
    <div class="form-row">
        <label for="node-input-method"><i class="fa fa-tasks"></i> Method</label>
        <select type="text" id="node-input-method" style="width:72%;">
        <option value="get">GET</option>
        <option value="post">POST</option>
        <option value="put">PUT</option>
        <option value="delete">DELETE</option>
        </select>
    </div>
    <div class="form-row">
        <label for="node-input-url"><i class="fa fa-globe"></i> url</label>
        <input type="text" id="node-input-url" placeholder="/url">
    </div>
    <div class="form-row">
        <label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
        <input type="text" id="node-input-name" placeholder="Name">
    </div>
    <div id="node-input-tip" class="form-tips">The url will be relative to <code><span id="node-input-path"></span></code>.</div>
</script>

<script type="text/x-red" data-help-name="http in">
    <p>Provides an input node for http requests, allowing the creation of simple web services.</p>
    <p>The resulting message has the following properties:
        <ul>
            <li>msg.req : <a href="http://expressjs.com/api.html#req">http request</a></li>
            <li>msg.res : <a href="http://expressjs.com/api.html#res">http response</a></li>
        </ul>
    </p>
    <p>For POST/PUT requests, the body is available under <code>msg.req.body</code>. This
       uses the <a href="http://expressjs.com/api.html#bodyParser">Express bodyParser middleware</a> to parse the content to a JSON object.
    </p>
    <p>
       By default, this expects the body of the request to be url encoded:
       <pre>foo=bar&amp;this=that</pre>
    </p>
    <p>
       To send JSON encoded data to the node, the content-type header of the request must be set to
       <code>application/json</code>.
    </p>
    <p>
       <b>Note: </b>This node does not send any response to the http request. This should be done with
       a subsequent HTTP Response node, or Function node.
       In the case of a Function node, the <a href="http://expressjs.com/api.html#res">Express response documentation</a>
       describes how this should be done. For example:
       <pre>msg.res.send(200, 'Thanks for the request ');<br/>return msg;</pre>
    </p>

</script>

<script type="text/x-red" data-template-name="http response">
    <div class="form-row">
        <label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
        <input type="text" id="node-input-name" placeholder="Name">
    </div>
    <div class="form-tips">The messages sent to this node <b>must</b> originate from an <i>http input</i> node</div>
</script>

<script type="text/x-red" data-help-name="http response">
    <p>Sends responses back to http requests received from an HTTP Input node.</p>
    <p>The response can be customised using the following message properties:</p>
    <ul>
        <li><code>payload</code> is sent as the body of the response</li>
        <li><code>statusCode</code>, if set, is used as the response status code (default: 200)</li>
        <li><code>headers</code>, if set, should be an object containing field/value
        pairs to be added as response headers.</li>
    </ul>
</script>

<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> Method</label>
        <select type="text" id="node-input-method" style="width:72%;">
        <option value="GET">GET</option>
        <option value="POST">POST</option>
        <option value="PUT">PUT</option>
        <option value="DELETE">DELETE</option>
        <option value="use">- set by msg.method -</option>
        </select>
    </div>
    <div class="form-row">
        <label for="node-input-url"><i class="fa fa-globe"></i> URL</label>
        <input type="text" id="node-input-url" placeholder="http://">
    </div>
    <div class="form-row">
        <label>&nbsp;</label>
        <input type="checkbox" id="node-input-useAuth" style="display: inline-block; width: auto; vertical-align: top;">
        <label for="node-input-useAuth" style="width: 70%;">Use basic authentication ?</label>
    </div>
    <div class="form-row node-input-useAuth-row">
        <label for="node-input-user"><i class="fa fa-user"></i> Username</label>
        <input type="text" id="node-input-user">
    </div>
    <div class="form-row node-input-useAuth-row">
        <label for="node-input-password"><i class="fa fa-lock"></i> Password</label>
        <input type="password" id="node-input-password">
    </div>
    <div class="form-row">
        <label for="node-input-ret"><i class="fa fa-arrow-left"></i> Return</label>
        <select type="text" id="node-input-ret" style="width:72%;">
        <option value="txt">a UTF-8 string</option>
        <option value="bin">a binary buffer</option>
        <option value="obj">a parsed JSON object</option>
        </select>
    </div>
    <div class="form-row">
        <label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
        <input type="text" id="node-input-name" placeholder="Name">
    </div>
    <div class="form-tips" id="tip-json" hidden>Tip: If the JSON parse fails the fetched string is returned as-is.</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.</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>
</script>

<script type="text/javascript">
    RED.nodes.registerType('http in',{
        category: 'input',
        color:"rgb(231, 231, 174)",
        defaults: {
            name: {value:""},
            url: {value:"",required:true},
            method: {value:"get",required:true}
        },
        inputs:0,
        outputs:1,
        icon: "white-globe.png",
        label: function() {
            if (this.name) {
                return this.name;
            } else if (this.url) {
                var root = RED.settings.httpNodeRoot;
                if (root.slice(-1) != "/") {
                    root = root+"/";
                }
                if (this.url.charAt(0) == "/") {
                    root += this.url.slice(1);
                } else {
                    root += this.url;
                }
                return "["+this.method+"] "+root;
            } else {
                return "http";
            }
        },
        labelStyle: function() {
            return this.name?"node_label_italic":"";
        },
        oneditprepare: function() {
            var root = RED.settings.httpNodeRoot;
            if (root.slice(-1) == "/") {
                root = root.slice(0,-1);
            }
            if (root == "") {
                $("#node-input-tip").hide();
            } else {
                $("#node-input-path").html(root);
                $("#node-input-tip").show();
            }
            //document.getElementById("node-config-wsdocpath").innerHTML=
        }

    });

    RED.nodes.registerType('http response',{
        category: 'output',
        color:"rgb(231, 231, 174)",
        defaults: {
            name: {value:""}
        },
        inputs:1,
        outputs:0,
        align: "right",
        icon: "white-globe.png",
        label: function() {
            return this.name||"http";
        },
        labelStyle: function() {
            return this.name?"node_label_italic":"";
        }
    });

    RED.nodes.registerType('http request',{
        category: 'function',
        color:"rgb(231, 231, 174)",
        defaults: {
            name: {value:""},
            method:{value:"GET"},
            ret: {value:"txt"},
            url:{value:""},
            //user -> credentials
            //pass -> credentials
        },
        credentials: {
            user: {type:"text"},
            password: {type: "password"}
        },
        inputs:1,
        outputs:1,
        align: "right",
        icon: "white-globe.png",
        label: function() {
            return this.name||"http request";
        },
        labelStyle: function() {
            return this.name?"node_label_italic":"";
        },
        oneditprepare: function() {
            if (this.credentials.user || this.credentials.has_password) {
                $('#node-input-useAuth').prop('checked', true);
                $(".node-input-useAuth-row").show();
            } else {
                $('#node-input-useAuth').prop('checked', false);
                $(".node-input-useAuth-row").hide();
            }

            $("#node-input-useAuth").change(function() {
                if ($(this).is(":checked")) {
                    $(".node-input-useAuth-row").show();
                } else {
                    $(".node-input-useAuth-row").hide();
                    $('#node-input-user').val('');
                    $('#node-input-password').val('');
                }
            });

            $("#node-input-ret").change(function() {
                if ($("#node-input-ret").val() === "obj") {
                    $("#tip-json").show();
                } else {
                    $("#tip-json").hide();
                }
            });
        }
    });
</script>