Merge pull request #20 from elliottsj/master

Prevent adding 'content-type' header if one already exists
googlearchive · Aug 22, 2014 · edb0b70 · edb0b70
2 parents 06f5ed6 + 3ded43b
commit edb0b70
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/core-ajax.html b/core-ajax.html
@@ -303,8 +303,11 @@
       if (args.headers && typeof(args.headers) == 'string') {
         args.headers = JSON.parse(args.headers);
       }
-      if (this.contentType) {
-        args.headers['content-type'] = this.contentType;
+      var hasContentType = Object.keys(args.headers).some(function (header) {
+        return header.toLowerCase() === 'content-type';
+      });
+      if (!hasContentType && this.contentType) {
+        args.headers['Content-Type'] = this.contentType;
       }
       if (this.handleAs === 'arraybuffer' || this.handleAs === 'blob' ||
           this.handleAs === 'document') {