LYCOS RETRIEVER 
Cookies: Servers
built 614 days ago
Cookies are not visible to client-side programs such as JavaScript if they have been sent with the HttpOnly flag. From the point of view of the server, the only difference with respect of the normal case is that the set-cookie header line is added a new field containing the string `HttpOnly':
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Understanding how cookies really work requires an understanding of how HTTP works. Cookies transport from Server to Client and back as an HTTP header. The specifications for this header are explicitly laid out in RFC 2109.
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The cookie specifications constrain cookies to be sent back only to the servers in the same domain as the server from which they originate. However, the value of cookies can be sent to other servers using means different from the Cookie header.
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When sending cookies to a server, all cookies with a more specific path mapping should be sent before cookies with less specific path mappings. For example, a cookie "name1=foo" with a path mapping of "/" should be sent after a cookie "name1=foo2" with a path mapping of "/bar" if they are both to be sent.
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HTTP cookies are used by Web servers to differentiate users and to maintain data related to the user during navigation, possibly across multiple visits. HTTP cookies were introduced to provide a way for realizing a "shopping cart" (or "shopping basket"),[1][2] a virtual device into which the user can "place" items to purchase, so that users can navigate a site where items are shown, adding or removing items from the shopping basket at any time.
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