![]() In UTF-8, the number of leading 1 bits in the first byte, which may be 0 (for 1-byte ASCII characters), 2, 3, or 4, indicates the number of bytes in the character. The decodeURI() function decodes the URI by treating each escape sequence in the form %XX as one UTF-8 code unit (one byte). : Thrown if encodedURI contains a % not followed by two hexadecimal digits, or if the escape sequence does not encode a valid UTF-8 character.ĭecodeURI() is a function property of the global object.: A complete, encoded Uniform Resource Identifier.Ī new string representing the unencoded version of the given encoded Uniform Resource Identifier (URI).I hope you enjoyed this post, and let me know in the comments about a time encoding helped you solve a difficult problem. Check for the characters mentioned above, and be sure to encode your URL before running your request. If a server rejects your requests, it might be that there are values in your URL that are breaking its completeness. Luckily, ASP.NET users get automatic encoding when using Razor, so it is not a common problem but something to keep in mind. If you’re finding strange behaviors in your rendered ASP.NET pages, you might want to check if you are encoding values properly. ![]() In URL encoding, we change the values that may violate the URL’s continuity, making the recipient misinterpret the full URL value. In HTML encoding, we change the characters that may potentially break an existing HTML page’s structure so that they can be rendered by the client safely. Cool! ConclusionĪs we saw in the encoding implementation for URL and HTML, they accomplish the ultimate goal of changing the value to be safe for the recipient. HTML encoded values will start with an ampersand ( &) and end with a semi-colon ( ). Public static string ? UrlEncode ( string ? value ) In this method, we’ll see what characters are considered safe and which ones need to be changed to respect our URL recipient. Let’s take a look at the UrlEncode found in the WebUtility type. There is also the HttpUtility class found under the namespace that can perform additional encoding/decoding on HTML attributes, query strings, JavaScript, and additional operations utilizing the Encoding type, which includes variants of UTF8, UTF16, and Unicode.įor the sake of this post, we’ll be sticking to the WebUtility implementations. The type is part of the System.Net namespace and can be found in the System.Runtime assembly. NET to perform core encoding tasks targeted at the web. NET Runtime has a WebUtility class that is the safest method in. ![]() The Utility Classes - WebUtility and HttpUtility Let’s get into HTML and URL encoding specifics and how the two differ from each other. A human may find it difficult to read Hello%2C+World, but its initial value of Hello, World natural. We may have seen encoded URLs with values like %20, which indicates a space in our URL. Decoding can be useful in scenarios where the initial value needs to be verified by a human set of eyes but ultimately sent to a non-human recipient. The process takes escaped characters and reverts them to their original value. The process of decoding is reversing the encoding process. We’ll get into more details in the HTML encoding part of this post. A user can input data into the application, and the site renders it without first validating its safety. Forgetting to encode user input is a typical problem for cross-site scripting attacks. In the case of HTML, those characters might be angle brackets ( ). The method of encoding takes a human-readable value and converts characters that may interfere with the recipient. What is Encoding/Decoding?Įncoding and decoding are the opposite sides of the same process: taking input and sanitizing it for its intended recipient. This post will look at the WebUtility class and break down how its methods operate on our input to encode/decode potentially breaking data. Additionally, when sending a request to our server, we may need to adhere to HTTP rules to ensure the server does not reject our web request. Unfortunately, web mainstays like HTML and HTTP don’t have those same capabilities, and in fact, don’t appreciate surprises.Īs programmers, we need to take additional steps when passing data to an HTML page to make sure it doesn’t break the HTML conventions. Our brain can process the things we need while ignoring the nonsense. As human beings, we have an innate ability to pick out valuable information from less-than-ideal situations. ![]()
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