Merge pull request +11473 from c9/require-cache-error

improve error handlidng of cached require

node_modules/architect-build/build_support/mini_require.js

@@ -443,9 +443,15 @@ var loadCached = function(path, cb) {
         return loadText(path, cb);
     function loadNew() {
         loadText(path, function(e, val, xhr) {
+            try {
                 var m = cb(e, val);
-            if (val) {
+            } catch(err) {
+                ideCache.delete(path);
+                e = err;
+            }
+            if (!e) {
                 var ETAG = xhr.getResponseHeader("ETAG");
+                if (!ETAG) return;
                 var res = new Response(val);
                 res.headers.set("ETAG", ETAG);
                 var req = new Request(path);
@@ -467,13 +473,16 @@ var loadCached = function(path, cb) {
     ideCache.match(path).then(function(e) {
         if (!e)
             return loadNew();
-        e.text().then(function(val) {
+        return e.text().then(function(val) {
             var deps = e.headers.get("deps");
             if (typeof deps == "string")
                 deps = deps ? deps.split(",") : [];
 
             cb(null, val, deps);
         });
+    }).catch(function() {
+        loadNew();
+        ideCache.delete(path);
     });
 };
 
@@ -532,9 +541,15 @@ function post(path, val, progress, cb) {
     var xhr = new window.XMLHttpRequest();
     xhr.open("POST", path, true);
     xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
-    xhr.onload = function(e) { cb(null, xhr.responseText, xhr); };
+    xhr.onload = function(e) {
+        if (xhr.status > 399 && xhr.status < 600)
+            return cb(xhr);
+        cb(null, xhr.responseText, xhr);
+    };
     xhr.onreadystatechange = function(e) { progress(xhr.responseText, xhr); };
-    xhr.onabort = xhr.onerror = function(e) { cb(e); };
+    xhr.onabort = xhr.onerror = function(e) { 
+        xhr && cb(e);
+    };
     xhr.send(val);
 }