URL Fetch Retry Mechanism Using Proxy Switching
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Solution Overview
Problem
Existing communication protocols over the Internet, such as TCP/IP, face challenges with network congestion, traffic load balancing, and unpredictable network behavior, leading to issues like packet loss, duplication, and out-of-order delivery, which can result in failed content fetching and inefficient resource retrieval.
Innovation Solution
Implementing a retry mechanism for content fetching using direct or non-direct schemes, such as different proxy servers or IP addresses, to ensure reliable data transfer and improve communication resilience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If TCP/IP protocol is used for Internet communication, then reliable data delivery is achieved, but network congestion and packet loss occur due to unpredictable network behavior
Solution Approach 1:
The system performs preliminary actions by implementing a retry mechanism that proactively attempts to fetch content multiple times using different schemes (direct, non-direct, different proxy servers, different IP addresses) before declaring a fetch failure. This preliminary retry approach prevents permanent data loss and improves reliability without requiring complex real-time network condition analysis.
2Device complexity
If traditional fetching scheme is used, then simple implementation is maintained, but fetch failures occur due to network congestion and unpredictable behavior
Solution Approach 1:
The system dynamically adapts the fetching scheme based on network conditions and previous fetch outcomes. It transitions from a static single-scheme approach to a dynamic multi-scheme approach, selecting different proxy servers, IP addresses, or fetching methods (direct/non-direct) based on real-time network behavior and historical performance data, thereby improving reliability without requiring complex manual configuration.
Solution Approach 2:
The system changes key parameters of the fetching operation including proxy server selection, IP address usage, and fetching scheme type (direct vs. non-direct). By varying these parameters across multiple retry attempts, the system increases the probability of successful content retrieval while maintaining implementation simplicity through automated parameter selection.
3Reliability
If multiple retry attempts with different schemes are implemented, then fetching reliability is improved, but system complexity increases
Solution Approach 1:
The retry mechanism operates autonomously without requiring external intervention or complex control systems. The system automatically selects fetching schemes, manages retry attempts, and adapts to network conditions on its own, thereby improving reliability while minimizing the complexity burden on external systems. The self-service nature allows the mechanism to handle complexity internally while presenting a simple interface externally.
Data Source
AI summary
A method for overcoming intermittent, temporary, or other fetching failures by using multiple attempts for retrieving a content from a web server to a client device is disclosed. The URL fetching may use direct or non-direct fetching schemes, or a combination thereof. The non-direct fetching method may use intermediate devices, such as proxy server, Data-Center proxy server, tunnel devices, or any combination thereof. Upon sensing a failure of a fetching action, the action is repeated using the same or different parameters or attributes, such as by using different intermediate devices, selected based on different parameters or attributes, such as different countries. The repetitions are limited to a pre-defined maximum number or attempts. The fetching attempts may be performed by the client device, by an intermediate device in a non-direct fetching scheme, or a combination thereof. Various fetching schemes may be used sequentially until the content is retrieved.