Fixing Nokogiri HTML Parsing Issues: Keeping Special Characters Intact скачать в хорошем качестве

Fixing Nokogiri HTML Parsing Issues: Keeping Special Characters Intact

Learn how to properly parse HTML using `Nokogiri` in Ruby on Rails while retaining special characters like ` ` and ` `. --- This video is based on the question https://stackoverflow.com/q/74886907/ asked by the user 'Ali Raza' ( https://stackoverflow.com/u/20386850/ ) and on the answer https://stackoverflow.com/a/74887936/ provided by the user 'Baldrick' ( https://stackoverflow.com/u/1128103/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Nokogiri miss html inner text if it contains " " Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l... The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license. If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com. --- Fixing Nokogiri HTML Parsing Issues: Keeping Special Characters Intact When parsing HTML strings in Ruby on Rails, developers often face challenges with libraries like Nokogiri. One such issue arises when dealing with inner text that includes special characters such as < and >. This guide will explore this problem and provide you with a solution to ensure that Nokogiri correctly retains these characters when converting HTML to JSON. The Problem Imagine you have an HTML string that looks like this: [[See Video to Reveal this Text or Code Snippet]] When using Nokogiri::XML to parse this HTML, you would expect to receive the text including the special character < in the result. However, instead of returning "< 109", it simply returns " 109" — quite the hassle! Here’s the scenario broken down: When using the string str = <td>< 109</td>, and parsing it with Nokogiri::XML(str), it yields an output that discards the special character. The result of result.children.children.to_s unexpectedly gives you just " 109" instead of the desired "< 109". Now, you might be asking yourself, "How can I get "< 109" instead of just " 109"?" The Solution Fortunately, there’s a simple fix for this issue that revolves around changing the parsing method you are using in Nokogiri. Instead of using Nokogiri::XML, you should opt for Nokogiri::HTML. Why Use Nokogiri::HTML? Nokogiri::HTML is more forgiving with malformed HTML, allowing it to parse and preserve special characters more effectively compared to Nokogiri::XML. This change in approach can save you from the frustrating loss of characters you wish to retain. Example Code Here’s how you can implement this change in your case: [[See Video to Reveal this Text or Code Snippet]] Steps to Fix Your Code: Replace your current parsing line: [[See Video to Reveal this Text or Code Snippet]] Change it to: [[See Video to Reveal this Text or Code Snippet]] Access the text as needed: [[See Video to Reveal this Text or Code Snippet]] Conclusion Switching from Nokogiri::XML to Nokogiri::HTML is a straightforward yet effective solution to retain special characters like < and > during HTML parsing in Ruby on Rails. By making this small adjustment, you can ensure that your data remains intact and that your JSON outputs are formatted as expected. With this method, you can avoid the frustration of losing important characters and streamline your HTML string to JSON conversion using Nokogiri. Happy coding!