Proxy Placeholder Insertion for Web Resource Code Adaptation
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Solution Overview
Problem
Web proxies face inefficiencies in modifying code within resources due to the resource-intensive nature of parsing and rewriting code, which can lead to bottlenecks as they handle increasing user loads, particularly when dealing with large code sizes.
Innovation Solution
Implementing a proxy system that inserts and replaces placeholders within code components of resources, allowing for the generation and storage of modified versions, which reduces the need for repeated parsing and enhances efficiency by using stored modified resources and dynamic placeholder replacement based on client and authentication criteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the proxy parses and rewrites code in resources for each request, then the code can be dynamically modified according to client and authentication criteria, but the computational burden and processing time increase significantly
Solution Approach 1:
The proxy performs code parsing and placeholder insertion in advance, storing the modified resource with placeholders before actual requests arrive. This preliminary modification action eliminates the need for repeated parsing during request handling, thereby resolving the contradiction between code adaptability and processing throughput.
Solution Approach 2:
The proxy creates a copy of the original resource, modifies it by inserting placeholders, and stores this modified version. The actual resource delivery uses this pre-modified copy rather than parsing the original each time, maintaining code adaptability while dramatically improving processing speed.
2Productivity
If the proxy stores modified versions of resources with placeholders, then repeated requests can be served faster, but memory resources are consumed to store multiple modified versions
Solution Approach 1:
The proxy extracts only the essential modification (placeholder insertion) from the full code rewriting process. By storing resources with placeholders rather than fully rewritten code for each client, the system reduces memory consumption while maintaining the ability to serve requests quickly through simple placeholder replacement.
3Adaptability or versatility
If the proxy performs full code rewriting for each client, then client-specific requirements can be met, but the processing time and computational resources increase
Solution Approach 1:
The proxy performs the time-consuming code parsing and structure modification in advance, inserting placeholders that will later be replaced with client-specific values. This preliminary action separates the heavy processing from the request handling, enabling client-specific customization without time penalties during actual request delivery.
Solution Approach 2:
The system transitions from static full code rewriting to dynamic placeholder replacement. The modified resource with placeholders serves as a dynamic template that can be quickly adapted to different clients by replacing placeholders with actual values, reducing processing time while maintaining customization capability.
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.