CSE 134B Lecture Notes - Lecture 15: Html, Plastic Ono Band, Public Key Certificate
6 Mar 2018
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403 error - extension not found (i. e. slides. foo does not know the foo extension configuration) Content negotiation is done in the http header (or set in the browser setting ) A browser that understands the 301 redirect will go to the new url! Confirm form resubmission: browser detects the same form submission. Post will repeat the posting of information if you try to refresh the page! (that repost may do something dangerous or insecure! (aka credit card purchase)) For a more secure option, the server should redirect you to the home page once logged in. Http [ rst , ] - tcp reset our connection! Next request has to do another tcp handshake, which is a performance issue. Bottom line: http performance heavily depended on tcp performance. Flag connection keep-alive - keep the tcp connection alive until we"re done talking! Server will close a connection iff it idles too long. Server allows many connections open @ the same time.
