Resource Code Placeholder Caching for Faster Proxy Delivery
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Solution Overview
Problem
Modifying code in web resources is a resource-intensive and time-consuming task for web proxies, which can become a bottleneck as they handle increasing user loads, impacting the ability to quickly deliver web pages.
Innovation Solution
Implementing a proxy computing device that inserts placeholders into code components of resources and stores modified versions, allowing dynamic replacement with placeholder values based on authentication credentials and other criteria, reducing the need for repeated parsing and rewriting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the proxy modifies code in web resources by parsing and rewriting, then authentication credentials can be dynamically inserted, but the process becomes resource-intensive and time-consuming
Solution Approach 1:
The proxy performs preliminary code modification by inserting placeholders during the first request processing. The modified code with placeholders is cached and reused for subsequent requests, eliminating the need for repeated parsing and rewriting while maintaining dynamic credential insertion capability through placeholder replacement
Solution Approach 2:
The code modification process is segmented into two distinct phases: (1) placeholder insertion during initial processing, and (2) placeholder value replacement during cached request handling. This segmentation allows the proxy to perform heavy lifting once and lightweight operations subsequently, resolving the contradiction between adaptability and productivity
2Adaptability or versatility
If the proxy parses and rewrites code for each request, then credentials can be customized per client, but the time consumption increases
Solution Approach 1:
The proxy performs preliminary placeholder insertion during the first request processing. The modified code with placeholders is cached and reused for subsequent requests, eliminating the need for repeated parsing and rewriting while maintaining per-client credential customization through placeholder value replacement
Solution Approach 2:
Instead of recreating the modified code for each request, the proxy creates a template copy with placeholders during initial processing and then generates client-specific versions by replacing placeholder values. This copying approach maintains customization while dramatically reducing processing time for subsequent requests
3Speed
If the proxy stores modified resource versions, then delivery speed increases, but memory usage increases
Solution Approach 1:
The proxy extracts only the essential placeholder markers from the code during initial modification and stores the template version. When serving cached requests, it extracts and inserts only the specific credential values needed, rather than storing complete client-specific versions. This extraction approach maintains fast delivery while minimizing memory storage requirements
Data Source
AI summary
Placeholders are inserted and replaced in placeholders in code included in resources. A proxy receives a request for a resource from a client and verifies an authentication credential included therein. The proxy determines a placeholder value indicating the authentication credential is verified and determines the requested resource corresponds to a first modified version of the resource stored in memory accessible to the proxy, the first modified version comprising a code component including a placeholder inserted by the proxy. The proxy replaces the placeholder with a first placeholder value to generate a second modified version of the resource and transmits the second modified version of the resource to a client. In another aspect, a client-side proxy service detects events in a modified version of a web page, inserts a placeholder in code of the web page, replaces the placeholder with a placeholder value, and evaluates the modified code.