URLDispatcher

URLDispatcher[{patt1content1,patt2content2,…}]

represents a dispatcher for deployed URLs that specifies that URLs with relative paths matching the string patterns patti should give content represented by contenti.

Details

  • CloudDeploy[URLDispatcher[…]] yields a cloud object corresponding to an active URL dispatcher. All URLs relative to the URL of this cloud object are normally interpreted using the URL dispatcher.
  • Specific deployment of a cloud object to a particular URL, e.g. by CloudDeploy, overrides any rule for that URL given by a URL dispatcher.
  • In the URLs specified by URLDispatcher, the patti are treated as textually appended to the base URL defined by the URL of the deployed URL dispatcher.
  • In CloudDeploy[URLDispatcher[{patt1:>…,…}]], the patti must start with /.
  • Trailing characters in URLs are by default ignored when the URLs are matched. To force an exact match to the end of a URL, include EndOfString in the string pattern.
  • The contenti must be content suitable for deployment using CloudDeploy.
  • The contenti can contain URLDispatcher.
  • When there are nested URLDispatcher specifications, each successive specification is given whatever trailing part of the URL remains after matching preceding specifications.

Examples

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Basic Examples  (2)

URLDispatcher can be used with simple strings:

Visiting https://www.wolframcloud.com/objects/user-b0c28e9f-876d-4478-9d8b-9e7d18a9ea81/application/form yields a FormFunction:

Visiting https://www.wolframcloud.com/objects/user-b0c28e9f-876d-4478-9d8b-9e7d18a9ea81/application/api yields an APIFunction:

Visiting the bare URL of the CloudObject yields a page not found error:

URLDispatcher also supports generic string patterns:

Generalizations & Extensions  (1)

URLDispatcher can be nested:

Visiting https://www.wolframcloud.com/objects/527ac761-7022-43c0-a01a-2bc5255dda1a/thailand yields a map:

        

Visiting https://www.wolframcloud.com/objects/527ac761-7022-43c0-a01a-2bc5255dda1a/thailand/Population yields the population:

        

Possible Issues  (3)

URLDispatcher matches when only the first part of the string matches:

Visiting https://www.wolframcloud.com/objects/3329aa63-b811-444c-90c7-29e527aa9eb5/abc?a=foo yields the following:

        

This means that if a substring matches first, the others will be ignored:

This will always go to the welcome page. To avoid this behavior, use an explicit EndOfString:

URLDispatcher requires an explicit "/" when deployed to a CloudObject. The following always returns a 404 error:

The same is not true when URLDispatcher is nested inside another URLDispatcher:

        
Wolfram Research (2016), URLDispatcher, Wolfram Language function, https://reference.wolfram.com/language/ref/URLDispatcher.html.

Text

Wolfram Research (2016), URLDispatcher, Wolfram Language function, https://reference.wolfram.com/language/ref/URLDispatcher.html.

CMS

Wolfram Language. 2016. "URLDispatcher." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/URLDispatcher.html.

APA

Wolfram Language. (2016). URLDispatcher. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/URLDispatcher.html

BibTeX

@misc{reference.wolfram_2024_urldispatcher, author="Wolfram Research", title="{URLDispatcher}", year="2016", howpublished="\url{https://reference.wolfram.com/language/ref/URLDispatcher.html}", note=[Accessed: 22-December-2024 ]}

BibLaTeX

@online{reference.wolfram_2024_urldispatcher, organization={Wolfram Research}, title={URLDispatcher}, year={2016}, url={https://reference.wolfram.com/language/ref/URLDispatcher.html}, note=[Accessed: 22-December-2024 ]}