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  2. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    The response 417 Expectation Failed indicates that the request should be repeated without the Expect header as it indicates that the server does not support expectations (this is the case, for example, of HTTP/1.0 servers). [1]: §10.1.1 101 Switching Protocols

  3. HTTP 404 - Wikipedia

    en.wikipedia.org/wiki/HTTP_404

    404.5 – Denied by request filtering configuration. 404.6 – Verb denied. 404.7 – File extension denied. 404.8 – Hidden namespace. 404.9 – File attribute hidden. 404.10 – Request header too long. 404.11 – Request contains double escape sequence. 404.12 – Request contains high-bit characters. 404.13 – Content length too large ...

  4. HTTP persistent connection - Wikipedia

    en.wikipedia.org/wiki/HTTP_persistent_connection

    Under HTTP 1.0, connections should always be closed by the server after sending the response. [1]Since at least late 1995, [2] developers of popular products (browsers, web servers, etc.) using HTTP/1.0, started to add an unofficial extension (to the protocol) named "keep-alive" in order to allow the reuse of a connection for multiple requests/responses.

  5. Axios (website) - Wikipedia

    en.wikipedia.org/wiki/Axios_(website)

    Axios had 6 million unique visitors in September 2017, according to Comscore. As of November 2017, Axios said it had 200,000 subscribers to 11 newsletters, with an average open rate of 52 percent. The same month, it said it would use a new $20 million investment to expand data analysis, product development, fund audience growth, and increase ...

  6. Operation 404 - Wikipedia

    en.wikipedia.org/wiki/Operation_404

    [1] The operation was named after HTTP 404 , which indicates the web page cannot be found, symbolizes the objective of making illegal content unavailable on the internet. [ 2 ] The operation involved the blocking and seizure of piracy websites, IPTV services, applications, and social media accounts. [ 3 ]

  7. XMLHttpRequest - Wikipedia

    en.wikipedia.org/wiki/XMLHttpRequest

    The methods allow a browser-based application to send requests to the server after page loading is complete, and receive information back. [2] XMLHttpRequest is a component of Ajax programming . Prior to Ajax, hyperlinks and form submissions were the primary mechanisms for interacting with the server, often replacing the current page with ...

  8. robots.txt - Wikipedia

    en.wikipedia.org/wiki/Robots.txt

    robots.txt is the filename used for implementing the Robots Exclusion Protocol, a standard used by websites to indicate to visiting web crawlers and other web robots which portions of the website they are allowed to visit.

  9. Alitalia Flight 404 - Wikipedia

    en.wikipedia.org/wiki/Alitalia_Flight_404

    The aircraft involved was a McDonnell Douglas DC-9-32, built-in 1974 with serial number 47641 and the registered number I-ATJA. The aircraft was first delivered to Aero Trasporti Italiani, [citation needed] a subsidiary of Alitalia and was transferred to Alitalia in October 1988.