Such URLs are Difficult to Memorize
In URL shortening, every long URL is associated with a unique key, which is the part after its top-level domain name. The shortest possible long-term URLs were generated by NanoURL from December 2009 until about 2011, associated with the top-level .to (Tonga) domain, in the form http://to./xxxx, where xxxx represents a sequence of random numbers and letters. Short URLs often circumvent the intended use of top-level domains for indicating the country of origin; domain registration in many countries requires proof of physical presence within that country, although a redirected URL has no such guarantee. The Reddit community strongly discourages - and in some subreddits, outright bans - URL shortening services for link submissions, because they disguise the origin domain name and whether the link has previously been submitted to Reddit, and there are few or no legitimate reasons to use link shorteners for Reddit link submissions. Often the redirect domain name is shorter than the original one. This may sometimes be done using short, CAPTCHA-protected URLs, but this is not common.
The most common cause cited was abuse by spammers. URL shortening may be utilized by spammers or for illicit internet activities. There are several reasons to use URL shortening. There are several web applications that can display the destination URL of a shortened URL. There are security implications, and obsolete short URLs remain in existence and may be circulated long after they cease to point to a relevant or even extant destination. To some extent it can obscure the destination of the URL; this may be advantageous, disadvantageous, or irrelevant. Finally, URL shortening sites provide detailed information on the clicks a link receives, which can be simpler than setting up an equally powerful server-side analytics engine, and unlike the latter, does not require any access to the server. University, Carnegie Mellon. "Shortened URL Security - Information Security Office - Computing Services - Carnegie Mellon University". Many web developers pass descriptive attributes in the URL to represent data hierarchies, command structures, transaction paths or session information. Typically, data: and javascript: URLs are not supported for security reasons (to combat attacks like cross-site scripting and session hijacking). This can be done online, at the web pages of a URL shortening service; to do it in batch via bulk upload with tools like CSV importer or on demand may require the use of an API. This content has been cre at ed with GSA Content Gen erat or DEMO!
This can result in URLs that are hundreds of characters long and that contain complex character patterns. Examples of this are "rickrolling", and redirecting to shock sites, or to affiliate websites. Many sites that accept user-submitted content block links, however, to certain domains in order to cut down on spam, and for this reason, known URL redirection services are often themselves added to spam blocklists. The short URL can allow blocked URLs to be accessed, bypassing site blocklists; this facilitates redirection of a user to blocked scam pages or pages containing malware or XSS attacks. Sometimes a short URL is useful simply to give someone over a telephone conversation for a one-off access or file download, and no longer needed within a couple of minutes. Short URLs, although making it easier to access what might otherwise be a very long URL or user-space on an ISP server, add an additional layer of complexity to the process of retrieving web pages. Depending on the transcription used, it might be more easily communicated and entered without error. If the shorthand link is found to be associated with a URL, the URL is fetched, otherwise an error message is returned.
This a rticle w as do ne by GSA Content Generator DEMO.
When a request is received for a shorthand link, the registry database is searched for an associated URL. Other uses of URL shortening are to "beautify" a link, track clicks, or disguise the underlying address. Some URL shortening services support the forwarding of mailto URLs, as an alternative to address munging, to avoid unwanted harvest by web crawlers or bots. So, although disguising of the underlying address may be desired for legitimate business or personal reasons, it is open to abuse. Services may record inbound statistics, youtube shorts which may be viewed publicly by others. Some URL shortening service providers have found themselves on spam blocklists, because of the use of their redirect services by sites trying to bypass those very same blocklists. In November 2009, the shortened links of the URL shortening service Bitly were accessed 2.1 billion times. Comparison of URL Shortening Services, SearchEngineLand. Hermanto, Michael. "Transitioning Google URL Shortener to Firebase Dynamic Links". URL Shortener - Google Chrome Extension Gallery"". From September 2010 Google URL Shortener became available via a direct interface. The patent was filed in September 2000; while the patent was issued in 2005, US patent applications are made public within 18 months of filing. Archived 5 September 2009 at the Wayback Machine.
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