Using ajax to fetch an URL using request type HEAD leads to parseerror when content-type is application/json on response. Using GET, it worked as expected.

According to RF2616, section 10.2.1 "HEAD the entity-header fields corresponding to the requested resource are sent in the response without any message-body". When the type of request is HEAD, jQuery should accept empty response, even when content-type is defined as application/json.

This fails

$.ajax({

url : "http:ip.jsontest.com/",

type : "HEAD",

success : function() { console.log("HEAD OK!"); },

error : function() { console.error("HEAD Failed!"); }

});

This is ok

$.ajax({

url : "http:ip.jsontest.com/",

type : "GET",

success : function() { console.log("GET OK!"); },

error : function() { console.error("GET Failed!"); }

});