Add cache clear endpoint

Author: pierotofy

libs/classes/AbstractCloudProvider.js

@@ -24,6 +24,12 @@ module.exports = class AbstractCloudProvider{
 
     // Providers should override this function to validate a user token
     // and optionally provide a list of restrictions on the user
+    
+    // @param token {String} a token passed to the proxy to authenticate a request
+    // Clear user specific caches (if any)
+    clearCache(token){
+        // Nothing
+    }
 
     // @param token {String} a token passed to the proxy to authenticate a request
     // @return {Object} See LocalCloudProvider for an example.

libs/classes/ValueCache.js

@@ -46,6 +46,10 @@ module.exports = class ValueCache{
         });
     }
 
+    clear(key){
+        if (this.cache[key] !== undefined) delete(this.cache[key]);
+    }
+
     get(key){
         if (this.enabled &&
             this.cache[key] !== undefined &&

libs/cloud-providers/LightningCloudProvider.js

@@ -25,7 +25,7 @@ module.exports = class LightningCloudProvider extends AbstractCloudProvider{
     constructor(){
         super();
 
-        this.validateCache = new ValueCache({expires: 15 * 60 * 1000});
+        this.validateCache = new ValueCache({expires: 60 * 60 * 1000});
 
         this.urlBase = "https://webodm.net/r";
         this.timeout = 15000;
@@ -35,6 +35,10 @@ module.exports = class LightningCloudProvider extends AbstractCloudProvider{
         return `${this.urlBase}${url}`
     }
 
+    clearCache(token){
+        this.validateCache.clear(token);
+    }
+
     async validate(token){
         if (!token) return {valid: false};
         const cached = this.validateCache.get(token);

libs/proxy.js

@@ -159,7 +159,14 @@ module.exports = {
                     const options = await getLimitedOptions(token, limits, node);
                     json(res, options);
                 }
-            }
+            },
+
+            '/cache/clear': async function(req, res, user){
+                const { token } = user;
+                optionsCache.clear(token);
+                cloudProvider.clearCache(token);
+                json(res, {ok: true});
+            },
         }
 
         // Listen for the `error` event on `proxy`.