Possibility to ignore specific paths using regexp wildcard

README.md

@@ -82,6 +82,9 @@ matchHeaders = ["X-UserName"]
 matchProps = ["id"]
 # Create a whitelist of properties (query/body) to base cache on.
 # Or set to false to match no properties. Default is to match all.
+ignorePath = ".*?\/file.*" 
+# Ignores caching for all url containing provided regexp expression.
+# This exemple will ignore all paths with /file in url ex. https://example.org/exmaple/file/test.png
 ignoreProps = ["nonce"]
 # Create a list of properties to ignore when otherwise matching all.
 contentType = "application/json"

src/app-utils.js

@@ -1,6 +1,7 @@
 import {parse} from 'url';
 import querystring from 'querystring';
 import {join} from 'path';
+import config from 'config';
 
 // Utility methods
 function stripSpecialChars (val) {
@@ -61,9 +62,24 @@ function getReqHeaders (req, match) {
 }
 
 export function shouldIgnore ({url}) {
+  const mapping = getMapping(url);
+  if (mapping && mapping.ignorePath && url.match(new RegExp(mapping.ignorePath, 'i'))) {
+    return true;
+  }
   return url === '' || url === '/' || url.startsWith('/__');
 }
 
+export function getMapping (url) {
+  const reqUrl = url.startsWith('/') ? url.substr(1) : url;
+  const key = reqUrl.split('/')[0];
+  const mappings = config.has('mappings') ? config.get('mappings') : {};
+  const mapmap = new Map();
+  Object.keys(mappings).forEach(key => mapmap.set(key, { key, ...mappings[key] }));
+  if (mappings.has(key)) {
+    return mappings.get(key);
+  }
+}
+
 export function resolveMockPath (req, dataRoot) {
   // Mock data directory associated with the API call
   let path = join(req.conf.dir, req.method);

src/mappings.js

@@ -1,21 +1,18 @@
 import config from 'config';
-import {shouldIgnore} from './app-utils';
+import {shouldIgnore, getMapping} from './app-utils';
 
 const mappings = config.has('mappings') ? config.get('mappings') : {};
-
 const mapmap = new Map();
-
 Object.keys(mappings).forEach(key => mapmap.set(key, { key, ...mappings[key] }));
 
 const middleware = () => (req, res, next) => {
   if (shouldIgnore(req)) {
     return next();
   }
-  // remove a leading slash if there is any
   const reqUrl = req.url.startsWith('/') ? req.url.substr(1) : req.url;
   const key = reqUrl.split('/')[0];
-  if (mappings.has(key)) {
-    const mapping = mappings.get(key);
+  const mapping = getMapping(req.url);
+  if (mapping) {
     const conf = {
       key: key,
       dir: mapping.dir || key,