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post requests
Anytime the server sends a response to your request, it can give you
information about its response using response headers.
The server talks back
The server
provides the
web browser
information
about a
response
using response
headers.
HTTP/1.1 400 Bad Request
Request Version: HTTP/1.1
Response Code: 400
Date: Wed, 01 Mar 2006 21:27:39 GMT
Server: Apache
X-Powered-By: PHP/4.3.11
Status: No order was received.
Connection: close
Transfer-Encoding: chunked
Content-Type: text/html
Web server
Here’s part of the actual
HTTP response that the
Break neck server sends back
to the web browser.
Here’s the
HTTP status
code indicating
an error.
The response
has a response
header called
“Status” in it.
This part is
the “value” of
the “Status”
response header.
Web Browser
Internet Explorer
Firefox
Opera
Safari
Mozilla
<script>
var request...
function foo()
{
...
}
</script>
JavaScript
Your JavaScript code can
access the response headers
through the request object.
request.getResponseHeader(“Status”)
“No order was received.”
You can access any response
header, and get its value.