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  2. X-Forwarded-For - Wikipedia

    en.wikipedia.org/wiki/X-Forwarded-For

    The general format of the field is: [2] X-Forwarded-For: client, proxy1, proxy2 where the value is a comma+space separated list of IP addresses, the left-most being the original client, and each successive proxy that passed the request adding the IP address where it received the request from.

  3. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    Therefore, HTTP/1.1 added status codes 303 and 307 to distinguish between the two behaviours. [1]: §15.4 303 See Other (since HTTP/1.1) The response to the request can be found under another URI using the GET method. When received in response to a POST (or PUT/DELETE), the client should presume that the server has received the data and should ...

  4. List of HTTP header fields - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_header_fields

    X-Powered-By [stackoverflow1 1] Specifies the technology (e.g. ASP.NET, PHP, JBoss) supporting the web application (version details are often in X-Runtime, X-Version, or X-AspNet-Version) X-Powered-By: PHP/5.4.0: X-Redirect-By [73] Specifies the component that is responsible for a particular redirect. X-Redirect-By: WordPress X-Redirect-By ...

  5. .localhost - Wikipedia

    en.wikipedia.org/wiki/.localhost

    The name localhost is a commonly defined hostname for the loopback interface in most TCP/IP systems, resolving to the IP addresses 127.0.0.1 in IPv4 and ::1 for IPv6.As a top-level domain, the name has traditionally been defined statically in host DNS implementations with address records (A and AAAA) pointing to the same loopback addresses.

  6. HTTP 404 - Wikipedia

    en.wikipedia.org/wiki/HTTP_404

    In the first case, it is better to employ URL mapping or URL redirection by returning a 301 Moved Permanently response, which can be configured in most server configuration files, or through URL rewriting; in the second case, a 410 Gone should be returned. Because these two options require special server configuration, most websites do not make ...

  7. Persistent uniform resource locator - Wikipedia

    en.wikipedia.org/wiki/Persistent_uniform...

    PURLs allow third party control over both URL resolution and resource metadata provision. A URL is simply an address of a resource on the World Wide Web. A Persistent URL is an address on the World Wide Web that causes a redirection to another Web resource. If a Web resource changes location (and hence URL), a PURL pointing to it can be updated.

  8. localhost - Wikipedia

    en.wikipedia.org/wiki/Localhost

    In computer networking, localhost is a hostname that refers to the current computer used to access it. The name localhost is reserved for loopback purposes. [1] It is used to access the network services that are running on the host via the loopback network interface. Using the loopback interface bypasses any local network interface hardware.

  9. Same-origin policy - Wikipedia

    en.wikipedia.org/wiki/Same-origin_policy

    The algorithm used to calculate the "origin" of a URI is specified in RFC 6454, Section 4. For absolute URIs, the origin is the triple {scheme, host, port}. If the URI does not use a hierarchical element as a naming authority (see RFC 3986 , Section 3.2) or if the URI is not an absolute URI, then a globally unique identifier is used.