Web Page Printing Control Device Preventing Unintended Behavior
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing printing technologies face issues with unintended behavior in web browsers or web pages when a print instruction is given just before the web page is closed unexpectedly, leading to potential errors or malfunctions.
Innovation Solution
A printing control device and method that acquires page identification information, processes print requests, transmits control instructions to a printing apparatus, receives responses, determines the readiness of the web page for notification, and only notifies the web page of the response when it is ready, thereby preventing unintended behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If printing is performed directly from a web page through connection to a printing apparatus, then printing functionality is achieved, but unintended behavior occurs when the web page is closed unexpectedly after a print instruction
Solution Approach 1:
The system establishes a preliminary connection between the web page and printing apparatus before the print operation is fully executed. This connection is maintained in a suspended state, allowing the system to detect if the web page is closed unexpectedly and prevent sending responses to closed pages, thereby avoiding unintended behavior while maintaining printing functionality.
2Ease of operation
If the web browser or web page is closed immediately after a print instruction operation, then user control is improved, but an unintended behavior occurs when a response notification is sent from the printing apparatus
Solution Approach 1:
The system implements a feedback mechanism that continuously monitors the state of the web page connection. When a print instruction is given, the system expects a response from the printing apparatus, but it first checks whether the web page is still open and ready to receive notifications. If the web page has been closed, the system suppresses the response notification, preventing unintended behavior while maintaining user control.
3Loss of information
If a response notification is always sent from the printing apparatus, then complete information flow is achieved, but unintended behavior occurs when the web page is not ready to be notified
Solution Approach 1:
The notification mechanism transitions from a static always-send approach to a dynamic state-dependent approach. The system maintains a readiness flag that is set when a print instruction is received and cleared when the print operation completes or the web page closes. The response notification is sent only when this flag indicates the web page is ready, ensuring complete information flow while maintaining notification stability.
Data Source
AI summary
A printing control device includes: an identification information acquisition module configured to acquire page identification information that identifies a web page of a request source among a plurality of web pages; a print request acquisition module configured to acquire a print request that is a request regarding a printing apparatus from the web page identified by the page identification information; a control instruction transmission module configured to transmit a control instruction based on the print request to the printing apparatus; a response reception module configured to receive, from the printing apparatus that transmits a response corresponding to the control instruction, the response; a determination module configured to determine whether the web page that has output the print request is ready to be notified; and a response notification module configured to notify the web page that has output the print request of information regarding the response when the determination module determines that the web page that has output the print request is ready to be notified, and otherwise avoid notifying the web page that has output the print request of the information regarding the response.