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POParsing URLs in .NET
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copied!<p>i'm looking for a .NET Framework class that can parse URLs.</p> <p>Some examples of URL's that require parsing:</p> <ul> <li><code>server:8088</code></li> <li><code>server:8088/func1</code></li> <li><code>server:8088/func1/SubFunc1</code></li> <li><code>http://server</code></li> <li><code>http://server/func1</code></li> <li><code>http://server/func/SubFunc1</code></li> <li><code>http://server:8088</code></li> <li><code>http://server:8088/func1</code></li> <li><code>http://server:8088/func1/SubFunc1</code></li> <li><code>magnet://server</code></li> <li><code>magnet://server/func1</code></li> <li><code>magnet://server/func/SubFunc1</code></li> <li><code>magnet://server:8088</code></li> <li><code>magnet://server:8088/func1</code></li> <li><code>magnet://server:8088/func1/SubFunc1</code></li> </ul> <p>The problem is that the <code>Uri</code> and <code>UriBuilder</code> classes do not handle the URLs correctly. For example, they are confused by:</p> <pre><code>stackoverflow.com:8088 </code></pre> <h1>Background on Urls</h1> <p>The format of a Url is:</p> <pre><code> foo://example.com:8042/over/there?name=ferret#nose \_/ \_________/ \__/\_________/\__________/ \__/ | | | | | | scheme host port path query fragment </code></pre> <p>In our case, we only care about:</p> <ul> <li><code>Uri.Scheme</code></li> <li><code>Uri.Host</code></li> <li><code>Uri.Port</code></li> <li><code>Uri.Path</code></li> </ul> <h1>Tests</h1> <p>Running some tests, we can check how <code>UriBuilder</code> class handles various Uri's:</p> <pre><code> Expected Expected Expected Expected //Test URI Scheme Server Port Path //===================================== ======== ======== ==== ==================== t("server", "", "server", -1, ""); t("server/func1", "", "server", -1, "/func1"); t("server/func1/SubFunc1", "", "server", -1, "/func1/SubFunc1"); t("server:8088", "", "server", 8088, ""); t("server:8088/func1", "", "server", 8088, "/func1"); t("server:8088/func1/SubFunc1", "", "server", 8088, "/func1/SubFunc1"); t("http://server", "http", "server", -1, "/func1"); t("http://server/func1", "http", "server", -1, "/func1"); t("http://server/func/SubFunc1", "http", "server", -1, "/func1/SubFunc1"); t("http://server:8088", "http", "server", 8088, ""); t("http://server:8088/func1", "http", "server", 8088, "/func1"); t("http://server:8088/func1/SubFunc1", "http", "server", 8088, "/func1/SubFunc1"); t("magnet://server", "magnet", "server", -1, ""); t("magnet://server/func1", "magnet", "server", -1, "/func1"); t("magnet://server/func/SubFunc1", "magnet", "server", -1, "/func/SubFunc1"); t("magnet://server:8088", "magnet", "server", 8088, ""); t("magnet://server:8088/func1", "magnet", "server", 8088, "/func1"); t("magnet://server:8088/func1/SubFunc1", "magnet", "server", 8088, "/func1/SubFunc1"); </code></pre> <p>All but six cases fail to parse correctly:</p> <pre><code>Url Scheme Host Port Path =================================== ====== ====== ==== =============== server http server 80 / server/func1 http server 80 /func1 server/func1/SubFunc1 http server 80 /func1/SubFunc1 server:8088 server -1 8088 server:8088/func1 server -1 8088/func1 server:8088/func1/SubFunc1 server -1 8088/func1/SubFunc1 http://server http server 80 / http://server/func1 http server 80 /func1 http://server/func/SubFunc1 http server 80 /func1/SubFunc1 http://server:8088 http server 8088 / http://server:8088/func1 http server 8088 /func1 http://server:8088/func1/SubFunc1 http server 8088 /func1/SubFunc1 magnet://server magnet server -1 / magnet://server/func1 magnet server -1 /func1 magnet://server/func/SubFunc1 magnet server -1 /func/SubFunc1 magnet://server:8088 magnet server 8088 / magnet://server:8088/func1 magnet server 8088 /func1 magnet://server:8088/func1/SubFunc1 magnet server 8088 /func1/SubFunc1 </code></pre> <p>i said i wanted a .NET Framework class. i would also accept any code-gum laying around that i can pick up and chew. As long as it satisfies my simplistic test cases.</p> <h1>Bonus Chatter</h1> <p>i was looking at expanding <a href="https://stackoverflow.com/questions/14685147/how-can-i-parse-http-urls-in-c">this question</a>, but that question is limited to <code>http</code> only.</p> <p>i also asked this <a href="https://stackoverflow.com/questions/20164298/net-how-to-build-a-url">same question earlier today</a>, but i realize now that i phrased it incorrectly. i incorrectly asked how to <em>"build"</em> a url. When in reality i want to <em>"parse"</em> a user-entered URL. i can't go back and fundamentally change the title now. So i'll ask the same question again, only better, with more clearly stated goals, here.</p> <h1>Bonus Reading</h1> <ul> <li><a href="https://stackoverflow.com/questions/14685147/how-can-i-parse-http-urls-in-c">How can I parse HTTP urls in C#?</a></li> <li><a href="https://stackoverflow.com/questions/20164298/net-how-to-build-a-url">How to build a Url?</a></li> </ul>

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