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Splash Lua API Overview — Splash 3.5 documentation

Splash provides a lot of methods, functions and properties; all of them are documented in Splash Scripts Reference, Available Lua Libraries, Element Object, Request Object, Response Object and Working with Binary Data. Here is a short description of the most used ones:

Each Splash Lua script can be seen as an HTTP API endpoint, with input arguments and structured result value. For example, you can emulate render.png endpoint using Lua script, including all its HTTP arguments.

• splash.args is the way to get data to the script;
• splash:set_result_status_code allows to change HTTP status code of the result;
• splash:set_result_content_type allows to change Content-Type returned to the client;
• splash:set_result_header allows to add custom HTTP headers to the result;
• Working with Binary Data section describes how to work with non-text data in Splash, e.g. how to return it to the client;
• treat library allows to customize the way data is serialized to JSON when returning the result.

• splash:runjs, splash:evaljs and splash:jsfunc allow to run arbitrary JavaScript in page context;
• splash:autoload allows to preload JavaScript libraries or execute some JavaScript code at the beginning of each page render;
• splash:mouse_click, splash:mouse_hover, splash:mouse_press, splash:mouse_release allow to send mouse events to specific coordinates on a page;
• element:mouse_click and element:mouse_hover allow to send mouse events to specific DOM elements;
• splash:send_keys and splash:send_text allow to send keyboard events to a page;
• element:send_keys and element:send_text allow to send keyboard events to particular DOM elements;
• you can get initial <form> values using element:form_values, change them in Lua code, fill the form with the updated values using element:fill and submit it using element:submit;
• splash.scroll_position allows to scroll the page;
• many methods and attributes of DOM HTMLElement are supported - see DOM Methods and DOM Attributes.

• splash:http_get - send an HTTP GET request and get a response without loading page to the browser;
• splash:http_post - send an HTTP POST request and get a response without loading page to the browser;

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