CSS font stacks & developer FAQs with Web standards
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A: The first thing to consider is why you're getting a 400 error and decide whether it is the best response to give for a particular request. In some cases, 400 is the best response to give and you should stick with it. For instance, many servlet applications give a 400 response if the request parameters have evidently been edited to make a request that is not permitted for security reasons.
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How do I correct a 400 bad request?
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