Expedited sub-resource loading

• US 11,070,608 B2
• Filed: 06/17/2015
• Issued: 07/20/2021
• Est. Priority Date: 06/17/2015
• Status: Active Grant

• Current Assignee: Fastly Incorporated
• Original Assignee: Fastly Incorporated
• Inventors: Souders, Steven
• Primary Examiner(s): Vostal, Ondrej C
• Application Number:
  US14/741,631
• Publication Number:
  US 20160373544A1
• Time in Patent Office: 2,225 Days
• Field of Search: 709213
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/34 involving the movement of software or configuration parameters network booting or remote initial program loading [RIPL] G06F9/4416
• CPC Class Codes: H04L 67/565 Conversion or adaptation of application format or content adding application control or application functional data H04L67/561
• CPC Class Codes: H04L 67/5681 Pre-fetching or pre-delivering data based on network characteristics

Abstract

Systems, methods, apparatus, and software for pre-fetching and/or pre-loading sub-resources used in rendering HTML files, web pages and the like are provided herein. Implementations include expedited sub-resource loading in which a cache node or other content delivery network component receives a first end user device request seeking a primary resource (e.g., an HTML file). Using information in the first request, the content delivery network pre-fetches one or more identified sub-resources (e.g., JavaScript code) required for rendering of the HTML file. Pre-fetched sub-resources are held by the cache node. During parsing of the HTML file by the end user device, a web browser or other application requires the sub-resource(s) and the end user device thus sends a second request to the cache node asking for the required sub-resource(s). The cache node sends the requested, pre-fetched sub-resource(s).

Claims

1. A method of operating a cache node that caches content for delivery to multiple, different end user devices, the method comprising:

receiving, at the cache node, a content request comprising a URL corresponding to a web page corresponding to an original HTML file, from an end user device of the multiple, different end user devices;

consulting a repository within the cache node to identify a first JavaScript code that is required for rendering the requested web page and obtain identification and location information for the first JavaScript code,

wherein the repository maintains a listing of JavaScript codes that have been historically requested for the URL corresponding to the web page by a plurality of the multiple different end users;

identifying a required sub-resource by scanning the original HTML file to identify a reference to the required sub-resource;

obtaining the first JavaScript code and the required sub-resource; and

sending the identified original HTML file, the first JavaScript code and the required sub-resource to the end user device,

wherein the original HTML file is used by the end user device to display the web page.

2. The method of claim 1 further comprising

receiving a request for the identified sub-resource from the end user device after sending the identified sub-resource to the end user device.

3. The method of claim 1 further comprising, prior to

receiving the content request,

caching the web page in the cache node.

4. A computer apparatus, comprising:

a processor; and

a memory;

wherein the computer apparatus is configured to operate a cache node in a content delivery network, the computer apparatus further comprising processing instructions that direct the cache node, when executed by the cache node, to;

receive a content request from an end user device of a group of multiple, different end user devices served by the cache node, comprising a URL corresponding to a web page;

identify an primary resource corresponding to the requested web page,

wherein the primary resource comprises a primary resource file body;

consult a repository within the cache node to identify a first JavaScript code required for rendering the requested web page and obtain identification and location information for the first JavaScript code

wherein the repository maintains a listing of JavaScript codes that have been historically requested for the URL corresponding to the web page by a plurality of the group of multiple, different end user devices;

identify a required sub-resource by scanning the original HTML file to identify a reference to the required sub-resource;

obtain the first JavaScript code and the required sub-resource; and

send the identified original HTML file, the first JavaScript code and the required sub-resource to the end user device, wherein the original HTML file is used by the end user device to display the web page.

5. A cache node that caches content for delivery to multiple,

different end user devices, the cache node comprising:

a storage system configured to cache web page content comprising an original HTML file corresponding to a web page, wherein the original HTML file comprises an HTML file body including a reference to a first JavaScript code that is required for rendering the web page;

a repository that maintains a listing of JavaScript codes that have been historically requested for a URL corresponding to the web page by a plurality of the multiple, different end user devices;

responsive to a content request from an end user device for the web page, a network interface and processing circuitry configured to;

receive the content request from the end user device;

identify the first JavaScript code that is required for rendering the web page by consulting the repository;

identify a required sub-resource by scanning the original HTML file to identify a reference to the required sub-resource;

obtain the first JavaScript code and the required sub-resource;

send the identified original HTML file, the first JavaScript code and the required sub-resource to the end user, wherein the original HTML file is used by the end user device to display the web page.

6. The cache node of claim 5 wherein the processing circuitry is further configured to receive a request for the JavaScript code from the end user device prior to the cache node sending the JavaScript code to the end user device.