IBM has published their latest Ajax article (Mastering Ajax, Part 3: Advanced requests and responses in Ajax, Gain a complete understanding of HTTP status codes, ready states, and the XMLHttpRequest object)
Everyone that works with Ajax should read this. What's in the article?
Digging deeper into HTTP ready states
Ready states in hiding
Viewing an in-progress request's ready state
Browser inconsistencies
Response data under the microscope
Viewing the response text during a request
Getting safe data
A closer look at HTTP status codes
200: Everything is OK
Redirection and rerouting
Errors
Additional request types
Making the request
Checking for a URL
Useful HEAD requests
The link to the article is here
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