Bitwise XOR String Matching for HTTP Header Processing
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Solution Overview
Problem
The processing of HTTP headers in servers is delayed due to the need for case-insensitive string matching, which requires additional processor calculations and contributes to server latency in responding to client requests.
Innovation Solution
A method and device that perform case-insensitive string matching by using bitwise exclusive OR operations on ASCII binary representations of HTTP header segments, allowing for efficient comparison and identification of matches without separate case checks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If case-insensitive string matching is performed on HTTP headers using traditional methods, then matching accuracy is ensured, but processor latency increases
Solution Approach 1:
The patent transforms the string matching problem from character-by-character comparison to bitwise operation by changing the parameter representation from ASCII characters to binary form. By performing bitwise XOR operations on binary representations of header strings, the system achieves case-insensitive matching while dramatically reducing processing time and latency.
Solution Approach 2:
The patent replaces the traditional mechanical string comparison process with a more efficient bitwise operation system. Instead of sequentially comparing characters and checking case sensitivity through multiple conditional statements, the invention uses bitwise XOR operations that can be executed in parallel, substituting the mechanical comparison process with a faster computational approach.
2Reliability
If case-insensitive string matching is performed on HTTP headers, then HTTP specification compliance is achieved, but processor efficiency decreases
Solution Approach 1:
The patent maintains HTTP specification compliance by ensuring case-insensitive matching while improving processor efficiency through parameter transformation. By converting strings to binary representation and using bitwise XOR operations, the system achieves the required case-insensitivity without the overhead of traditional character-by-character comparison and case checking.
Solution Approach 2:
The patent substitutes the inefficient mechanical process of case-insensitive string matching with a streamlined bitwise operation system. This replacement maintains full compliance with HTTP specification requirements while dramatically improving processor efficiency by eliminating redundant comparison steps and enabling parallel processing of header data.
3Ease of manufacture
If traditional string matching methods are used on HTTP headers, then code simplicity is maintained, but processing speed decreases
Solution Approach 1:
The patent improves processing speed by changing the parameter representation from ASCII characters to binary form, enabling the use of efficient bitwise operations. This parameter transformation allows the system to process HTTP headers much faster while the underlying implementation remains conceptually simple and maintainable.
Solution Approach 2:
The patent replaces the traditional mechanical string matching approach with a bitwise operation-based system that achieves both simplicity and high speed. By substituting character-by-character comparison with bitwise XOR operations on binary representations, the system maintains code simplicity while dramatically increasing processing speed for HTTP header matching.
Data Source
AI summary
A method and device for string matching HTTP headers. The method typically includes identifying a predefined string, identifying an unknown string to compare with the predefined string, performing a bitwise exclusive OR operation on an ASCII binary representation of at least one segment of the unknown string and an ASCII binary representation of at least one segment of the predefined string, and identifying a case-insensitive string match based on the exclusive OR operation. The method may further include performing a bitwise operation with a predefined flag to determine the case-insensitive segment match.