check http method before executing

validate the http method on the callback payload before
trying to execute the time.

clear and delete if it doesn't pass

lib/transports/http.js

@@ -3,7 +3,7 @@
 /**
  * The Http transport backend
  * @module skyring/lib/transports/http
- * @author Eric Satterwhite 
+ * @author Eric Satterwhite
  * @since 1.0.0
  * @requires http
  * @requires request
@@ -12,6 +12,7 @@
  */
 
 const STATUS_CODES = require('http').STATUS_CODES
+    , method_exp = /^(post|put|patch|delete|get|options|head)$/i
     , request = require('request')
     , debug   = require('debug')('skyring:transport:http')
     ;
@@ -27,12 +28,23 @@ const STATUS_CODES = require('http').STATUS_CODES
  **/
 module.exports = function makeRequest( method, url, payload, id, cache) {
   const isJSON = typeof payload === 'object'
-  const options = {
-    body: payload || ""
-  , json: isJSON
-  };
+      , _method = method.toLowerCase()
+      , options = {
+        body: payload || ""
+      , json: isJSON
+      };
+
+
+  if( method_exp.test(method) && typeof request[_method] !== 'function' ) {
+    const t = cache.get(id)
+    t && clearTimeout(t.timer)
+    cache.delete(id)
+    debug('unable to execute http transport', method, id)
+    return
+  }
+
   debug('executing http transport %s', id, method);
-  request[method.toLowerCase()](url, options, (err, res, body) => {
+  request[_method](url, options, (err, res, body) => {
     if(err){
       debug('timer fail');
       return cache.remove(id);