Dynamic Watchdog Timer for Web Page Load Detection
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Solution Overview
Problem
Current web page monitoring technologies face challenges in accurately detecting the complete loading of web pages, especially with dynamically loaded content, leading to incomplete or inaccurate reports due to the complexity of tracking resources like iframes and network requests.
Innovation Solution
A dynamic watchdog timer system is implemented at the web browser to recursively check for the completion of webpage loading, ensuring that all resources, including images and iframes, have finished loading before generating a report, using a pre-determined timeout period to verify the absence of open network requests and completed timestamps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current web page monitoring technologies are used to detect webpage loading, then the monitoring process can be implemented, but the detection accuracy is insufficient leading to incomplete or inaccurate reports
Solution Approach 1:
The monitoring system segments the webpage loading detection into multiple independent checks: DOM content loading, JavaScript execution completion, network request status, and resource loading status. Each segment monitors a specific aspect of page loading, and all segments must confirm completion before generating a final report, ensuring comprehensive and accurate detection
Solution Approach 2:
The system implements continuous feedback loops where the monitoring agent repeatedly checks webpage loading status through multiple indicators (DOM readiness, JavaScript execution state, network request completion). Based on feedback from these checks, the system dynamically adjusts monitoring intensity and determines when loading is truly complete, preventing premature report generation
2Ease of manufacture
If a simple timeout-based detection method is used, then the implementation is simple, but it cannot accurately detect complete loading of dynamically loaded content
Solution Approach 1:
The system performs preliminary actions by injecting a monitoring agent into the webpage before loading begins. This agent establishes event listeners and hooks into the browser's loading mechanisms in advance, enabling it to track all loading events (DOM changes, network requests, JavaScript execution) as they occur, rather than relying on post-loading timeout checks
Solution Approach 2:
The monitoring agent acts as an intermediary between the webpage loading process and the detection system. It intercepts and monitors various loading events (DOMContentLoaded, window.onload, network requests, JavaScript execution) and translates them into detectable states, providing accurate real-time information about loading completion without requiring complex external analysis
3Reliability
If multiple resources like iframes and network requests are tracked recursively, then complete loading detection is achieved, but the system complexity increases
Solution Approach 1:
The monitoring agent implements a universal detection mechanism that handles multiple resource types (images, iframes, scripts, stylesheets, network requests) through a single unified approach. It uses generic event listeners and loading status checks that work across all resource types, reducing the need for separate complex tracking logic for each resource while maintaining comprehensive monitoring
Solution Approach 2:
The system employs nested monitoring where the main monitoring agent contains sub-monitors for different resource types (iframes, images, scripts). Each nested monitor tracks its specific resource and reports to the parent agent, which aggregates all status information. This hierarchical nested structure organizes the complexity systematically while ensuring all resources are tracked
Data Source
AI summary
In one aspect, a system for automatic detection of webpage loading at a web browser of a client device in a monitored environment is disclosed. The system includes: a processor; a memory; and one or more modules stored in the memory and executable by a processor to perform operations. The operations include: detect start of loading of a webpage at the web browser of the client device in the monitored environment; set a dynamic watchdog repeating timer at a value; start the timer; recursively check for completion of the loading of the webpage; when determined that the loading of the webpage has completed, determine whether a Java script engine of the web browser loading the webpage is idle; and when determined that the Java script engine of the web browser loading the webpage is idle, stop the timer and generate a report of the webpage.