feat(coap-in): Add simple ./well-known/core handler

JKRhb · Jul 4, 2024 · 887f4e5 · 887f4e5
1 parent d42a434
commit 887f4e5
Show file tree

Hide file tree

Showing 4 changed files with 29 additions and 1 deletion.
diff --git a/coap/coap-in.html b/coap/coap-in.html
@@ -14,6 +14,10 @@
         <label for="node-config-input-port"><span data-i18n="coapServer.configInputPort.label"></span></label>
         <input type="text" id="node-config-input-port" placeholder="5683" />
     </div>
+    <div class="form-row">
+        <input type="checkbox" id="node-config-input-wellknowncore" style="display: inline-block; width: auto; vertical-align: top;">
+        <label for="node-config-input-wellknowncore" style="width: auto" data-i18n="coapServer.configInputwellKnownCore.label"></label>
+    </div>
     <div class="form-tips">
         <span data-i18n="[html]coapServer.tip">
     </div>
@@ -26,6 +30,7 @@
             name: { value: "" },
             port: { value: 5683, required: true },
             ipv6: { value: false, required: true },
+            wellknowncore: { value: false, required: true },
         },
         inputs: 0,
         outputs: 0,

diff --git a/coap/coap-in.js b/coap/coap-in.js
@@ -15,13 +15,19 @@ module.exports = function (RED) {
 
         node._inputNodes = []; // collection of "coap in" nodes that represent coap resources
 
+        /**
+         * Resource list for /.well-known/core
+         */
+        node._resourceList = [];
+
         // Setup node-coap server and start
         const serverSettings = {};
         if (config.ipv6) {
             serverSettings.type = "udp6";
         } else {
             serverSettings.type = "udp4";
         }
+        node._supportWellKnownCore = config.wellknowncore ?? false;
         node.server = new coap.createServer(serverSettings);
         node.server.on("request", function (req, res) {
             node.handleRequest(req, res);
@@ -62,6 +68,14 @@ module.exports = function (RED) {
         }
     };
 
+    CoapServerNode.prototype._handleWellKnownCore = function (res) {
+        // TODO: Expand capabilities of the handler for /.well-known/core
+        res.code = "2.05";
+        res.setOption("Content-Format", "application/link-format");
+        const payload = this._resourceList.map((resource) => `<${resource}>`).join(",")
+        return res.end(payload);
+    }
+
     function _getPayload(inNode, rawBuffer, payload, contentFormat) {
         if (rawBuffer) {
             return payload;
@@ -96,7 +110,10 @@ module.exports = function (RED) {
     }
 
     CoapServerNode.prototype.handleRequest = function (req, res) {
-        //TODO: Check if there are any matching resource. If the resource is .well-known return the resource directory to the client
+        if (this._supportWellKnownCore && req.url == "/.well-known/core" && req.method == "GET") {
+            return this._handleWellKnownCore(res);
+        }
+
         const node = this;
         let matchResource = false;
         let matchMethod = false;

diff --git a/coap/locales/de/coap-in.json b/coap/locales/de/coap-in.json
@@ -33,6 +33,9 @@
         "configInputPort": {
             "label": "Port"
         },
+        "configInputwellKnownCore": {
+            "label": "/.well-known/core aktivieren"
+        },
         "tip": "<em>CoAP</em> basiert auf <em>UDP</em>, weshalb es sein kann, dass Sie einen <em>UDP</em>-Port in Ihrer Firewall öffnen müssen."
     }
 }
diff --git a/coap/locales/en-US/coap-in.json b/coap/locales/en-US/coap-in.json
@@ -33,6 +33,9 @@
         "configInputPort": {
             "label": "Port"
         },
+        "configInputwellKnownCore": {
+            "label": "Activate /.well-known/core"
+        },
         "tip": "<em>CoAP</em> is based on <em>UDP</em> so you may need to open a <em>UDP</em> port in your firewall."
     }
 }