httr is a third-party library used to send HTTP requests in the R language, mainly serving data fetching and API calls, supporting GET, POST request methods. For data analysis scenarios, it serves developers to obtain or submit network data through programming, and combines with XML and rvest parsing library to realize automatic extraction of web content. Request and response processing: The request is sent via the GET() or POST() functions, and the response content is extracted using the content() function. The application mainly provides the conversion of httr code with common data formats as the core, specifically, including XML tag conversion to R httr code, TOML data conversion to R httr code, JSON data conversion to R httr code, HTML tag conversion to R httr code. The application has a strong ability to process the basic data (XML/TOML/JSON/HTML), and will process the processed data through the core calculation/conversion, and finally generate R httr code for developers to use directly. The application has the characteristics of simplicity, efficiency, security and lightweight. At the same time, the core data analysis, calculation and conversion will be completed in localization to ensure user privacy and data security.