Crawler Adapter Proxy Switching for Web Access
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Solution Overview
Problem
Web crawlers face challenges in accessing web pages due to website hosts blocking automated requests, as they attempt to differentiate between human and automated access, leading to denied access and inefficient data retrieval.
Innovation Solution
An apparatus and method utilizing a crawler adapter that selects and switches between multiple proxy servers to send access requests to a web page, analyzing responses to determine denial and re-attempt access through different proxy servers, establishing persistent connections to improve access success rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If web crawlers send automated requests to access web pages, then data retrieval efficiency is improved, but access is blocked by website hosts
Solution Approach 1:
The patent introduces proxy servers as intermediaries between web crawlers and website hosts. The crawler adapter sends requests through selected proxy servers, which forward them to the target website. This intermediary layer masks the automated nature of requests, allowing data retrieval to proceed while evading host blocking mechanisms.
Solution Approach 2:
The system dynamically selects and switches between multiple proxy servers based on response analysis. When a proxy server is identified as blocked or ineffective, the crawler adapter automatically switches to a different proxy server, creating a dynamic adaptation mechanism that maintains access reliability despite host blocking attempts.
2Ease of operation
If website hosts block automated requests to protect manual access, then human visitor experience is improved, but automated data retrieval is hindered
Solution Approach 1:
Proxy servers serve as mediators that mask automated requests, making them appear to originate from regular user connections. This allows automated data retrieval to occur without compromising the experience of manual visitors, as the blocking mechanism is circumvented through the intermediary layer.
Solution Approach 2:
The system changes parameters such as IP addresses, user agents, and connection characteristics by routing through different proxy servers. This parameter variation allows automated requests to bypass detection mechanisms while maintaining the appearance of legitimate manual access.
3Reliability
If web crawlers use multiple proxy servers to bypass blocking, then access reliability is improved, but system complexity increases
Solution Approach 1:
The crawler adapter serves multiple functions: it manages proxy server selection, analyzes responses, determines blocking status, and coordinates re-attempts. This multi-functional design consolidates complexity into a single component rather than distributing it across multiple separate systems.
Solution Approach 2:
The system automatically monitors response patterns, identifies blocked proxy servers, and switches to alternative proxies without external intervention. This self-service mechanism handles the complexity of multi-proxy management autonomously, reducing the need for external control systems.
4Productivity
If persistent connections are established to proxy servers, then access efficiency is improved, but connection management complexity increases
Solution Approach 1:
The crawler adapter centrally manages all connection aspects including establishment, maintenance, and termination of persistent connections to proxy servers. This universal management approach consolidates connection complexity into a single control point while enabling efficient persistent connections.
Solution Approach 2:
Persistent connections maintain continuous communication channels with proxy servers, eliminating the need for repeated connection establishment. This continuity improves access efficiency by reducing connection overhead while the centralized management handles the complexity of maintaining these continuous connections.
Data Source
AI summary
An apparatus for accessing web pages includes: a communication interface; and a processor communicatively coupled to the communication interface and configured to: receive a web crawler request, from the communication interface, to access a specified web page; select a first selected proxy server from among a plurality of proxy servers; send, via the communication interface, a first access request to the first selected proxy server requesting access to the specified web page; receive, via the communication interface, a response from the selected proxy server corresponding to the first access request; analyze the response from the selected proxy server; select a second selected proxy server from among the plurality of proxy servers in response to determining from the response that the first access request was denied; and send, via the communication interface, a second access request to the second selected proxy server requesting access to the specified web page.