/**
* get RemoteView according to request. HTTP Header from JQuery XHR: Accept: application/json,
* text/javascript, * / * Accept: application/xml, text/xml, * / * However, IE6 will send Accept:
* * / * and accept: application/json, text/javascript, * / * at same time
*
* @param req
* @return
*/
private String getViewType(VRaptorServletRequest req) {
Enumeration<?> accepts = req.getHeaders(ACCEPTREQUESTEADER); // IE6 will send two Accept header
StringBuilder acceptBuilder = new StringBuilder();
for (; accepts.hasMoreElements(); ) {
acceptBuilder.append(accepts.nextElement());
acceptBuilder.append(", ");
}
String accept = acceptBuilder.toString();
if (StringUtils.isEmpty(accept)) return null;
if (accept.indexOf("application/json") > -1) {
return SUPPORTEDJSON;
} else if (accept.indexOf("application/xml") > -1) {
return SUPPORTEDXML;
}
return null;
}
/**
* is it XMLHttpRequest? when JQuery send a ajax request to remote, it will send the header.
* xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest");
*
* @param req
* @return
*/
private boolean isXhr(VRaptorServletRequest req) {
return XHRHEADERVALUE.equals(req.getHeader(XREQUESTEADER));
}