JavaScript Ajax gets and sets the header

XMLHttpRequest the method in the object that is related to the header:

setRequestHeader (

getResponseHeader (

getAllResponseHeaders ()--Gets all headers in a single string;

Overwrite the HTTP method of the request, the following code: can circumvent the firewall only allow get and post requests through the restrictions;

Httprequest.setrequestheader ("X-http-method-override", "DELETE");

To disable content caching:

Httprequest.setrequestheader ("Cache-control", "No-cache");

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JavaScript Ajax gets and sets the header