increased cache lifetime to 600s; prevent cache write in groom api

routes/cache.js

@@ -152,6 +152,7 @@ cache.groomPost = function(req, res) {
   var _filename = req.body.filename,
       _payload = req.body.payload;
 
+  if (!cacheCallInProgress) {
     if (_filename) {
       if (!_payload) {
         var errorObj = {
@@ -185,6 +186,14 @@ cache.groomPost = function(req, res) {
         'result': 'no file name provided'
       };
 
+      res.end(JSON.stringify(errorObj));
+    }
+  } else {
+    var errorObj = {
+      'msg': 'error',
+      'result': 'another job is in progress'
+    };
+
     res.end(JSON.stringify(errorObj));
   }
 }
@@ -303,9 +312,35 @@ cache.one = function(req, res, next) {
 
     console.log('cache-one call started');
 
+    function fixJSON(data) {
+      console.log(data);
+      if (data && data.length) {
+        try {
+          var parsedJSON = JSON.parse(data);
+
+          return parsedJSON;
+        } catch (e) {
+          console.log(e);
+          if (e.toString().indexOf('at position') > -1) {
+            const errorPos = e.toString().split(' ');
+
+            console.log('JSON error ---> ' + data.substring(errorPos[errorPos.length - 1] - 20, errorPos[errorPos.length - 1] + 20) + ' | error sequence: ' + data.substring(errorPos[errorPos.length - 1], errorPos[errorPos.length - 1] + 1));
+            console.log('attempting to recover JSON data');
+            return JSON.parse(data.substring(0, errorPos[errorPos.length - 1]));
+          }
+          if (e.toString().indexOf('Unexpected end of JSON input')) {
+            return {};
+          }
+        }
+      } else {
+        return {};
+      }
+    }
+
     if (fs.existsSync(cache.iguanaDir + '/shepherd/cache-' + pubkey + '.json') && coin !== 'all') {
       var _file = fs.readFileSync(cache.iguanaDir + '/shepherd/cache-' + pubkey + '.json', 'utf8');
-      outObj = _file ? JSON.parse(_file) : {};
+      //outObj = _file ? JSON.parse(_file) : {};
+      outObj = fixJSON(_file);
 
       if (!outObj || !outObj.basilisk) {
         console.log('no local basilisk info');