posts.js in coprl-3.0.0.beta.5

- old
+ new

@@ -57,17 +57,14 @@
 
         for (const [name, value] of Object.entries(expandedParams)) {
             formData.append(name, encode(value));
         }
 
-        const paramCount = Array.from(formData).length;
-
-        if (paramCount < 1) {
+        if (this.paramCount(formData) < 1) {
             console.warn(
                 'Creating request with no data!'
-                + ' Are you sure you\'ve hooked everything up correctly?',
-            );
+                + ' Are you sure you\'ve hooked everything up correctly?');
         }
 
         let errors = this.validate(formData);
         if (errors.length > 0) {
             return new Promise(function(_, reject) {
@@ -183,11 +180,18 @@
                     httpRequest.setRequestHeader(key, value);
                 }
             }
 
             // Send our FormData object; HTTP headers are set automatically
-            httpRequest.send(formData);
+            // Rack 2.2 will throw an exception https://github.com/rack/rack/issues/1603
+            // if we set the header as multi-part form data with no data in the body
+            // So we set the body to null in this case.
+            httpRequest.send(this.paramCount(formData) < 1 ? null : formData);
         });
+    }
+
+    paramCount(formData){
+        return Array.from(formData).length;
     }
 
     isForm() {
         var parentElement = this.parentElement();
         return parentElement && parentElement.elements;