LLM Agent Design Based on Waterfall Model

Waterfall Model?!

The waterfall model is a classic software development model, named for its process resembling a waterfall cascading down through stages. It divides the software development process into a series of fixed-sequence phases, each with clear inputs and outputs, and requiring completion of the previous phase before starting the next.

Typical Phases of the Waterfall Model:

1. Requirements Analysis: Thoroughly understand user needs, determine specific requirements for software functionality, performance, etc., and produce a detailed requirements specification document.
2. System Design: Based on the requirements specification document, design the software system’s architecture, modules, interfaces, data structures, etc., and form a system design document.
3. Coding Implementation: Convert the system design into executable code, conduct unit testing to ensure each module functions correctly.
4. Testing: Perform integration testing, system testing, and acceptance testing on the completed software to identify and fix defects, ensuring that software quality meets requirements.
5. Deployment: Deploy the tested software to the actual running environment and provide user training.
6. Maintenance: Continuously maintain and update the launched software, fix bugs, improve functionality, and enhance user experience.

Advantages of the Waterfall Model:

• Clear and Understandable Process: Each phase has clear objectives and outputs, making it easy to understand and manage, suitable for novice teams or large projects.
• Comprehensive and Standardized Documentation: Each phase requires detailed documentation, facilitating communication and collaboration among team members, and convenient for later maintenance and upgrades.
• Early Defect Detection: Strict reviews during requirements analysis and design phases can identify and resolve problems early, reducing costs associated with later modifications.

Why Waterfall Model?

The waterfall model and LLM Agent share some interesting similarities in their operational processes and philosophies:

1. Linear Process and Phases

• Waterfall Model: Operates in a linear fashion, breaking down the software development process into a series of sequential phases.
• LLM Agent: Also follows a certain set of steps when solving problems or completing tasks, such as receiving instructions, understanding instructions, planning steps, executing steps, and outputting results.

2. Clear Requirements and Goals

• Waterfall Model: Emphasizes detailed requirements analysis in the early stages of the project, clarifying software functionality and goals.
• LLM Agent: Needs clear instructions or goals to understand user intent and effectively execute tasks. Ambiguous or unclear instructions can lead to the Agent misinterpreting and generating incorrect outputs.

3. Importance of Documentation and Records

• Waterfall Model: Emphasizes documentation, with each phase requiring detailed documentation, such as requirements specifications, system design documents, etc.
• LLM Agent: Training and evaluation also rely heavily on textual data and records. Higher quality training data results in better Agent performance. Furthermore, recording the Agent’s interaction history can help developers analyze its behavior, improve algorithms, and optimize performance.

Waterfall Model Common Division of Labor

In the software development process that follows the waterfall model, the following main roles and divisions of labor are usually involved:
1. Project Manager:

• Responsibilities:

  • Plan, organize, and manage the entire software development project.
  • Develop project plans, including time schedules, resource allocation, risk management, etc.
  • Lead and coordinate team members to ensure the project is executed as planned.
  • Communicate with the client, gather requirements, and report project progress.

• Participating Stage: All stages

2. Product Manager/Business Analyst:

• Responsibilities:

  • Understand user needs in depth and translate them into detailed requirement specifications.
  • Be responsible for communicating with the client, clarifying requirement details, and answering questions.
  • Participate in requirement reviews to ensure the accuracy and completeness of the requirement documents.

• Participating Stage: Requirement analysis and definition

3. System Architect:

• Responsibilities:

  • Based on the requirement specification documents, design the overall architecture of the software system.
  • Determine system module division, interface definition, data structure, etc.
  • Select suitable technical solutions and conduct technical evaluation.
  • Guide the development team in system design and coding work.

• Participating Stage: System design

4. Software Developer/Programmer:

• Responsibilities:
  • Based on the system design documents, write program code to implement system functions.
  • Conduct unit testing to ensure code quality.
  • Fix defects found during testing.
  • Participate in code review to improve code quality.
• Participating Stage: Program coding

5. Test Engineer/QA Engineer:

• Responsibilities:
  • Develop test plans and test cases and conduct software testing.
  • Execute test cases, find and report software defects.
  • Track defect repair status and ensure software quality.
  • Participate in requirement reviews and design reviews to identify potential problems early.
• Participating Stage: Software testing

6. Operations Engineer/DevOps Engineer:

• Responsibilities:
  • Responsible for software deployment, maintenance, and monitoring.
  • Ensure the stable operation of software in production environment.
  • Handle faults and problems encountered in the production environment.
  • Participate in the formulation and implementation of software deployment plans.
• Participating Stage: Software deployment, software maintenance

7. Customer/Stakeholder:

• Responsibilities:
  • Propose software requirements and communicate requirement details with the development team.
  • Participate in requirement reviews to confirm the accuracy of requirement documents.
  • Participate in software testing and accept software functions.
• Participating Stage: Requirement analysis and definition, software testing

LLM Agent Emulating Waterfall Model Development Task Design

To better simulate the development process of the waterfall model, we can leverage the capabilities of LLM Agents by assigning them different roles and dividing tasks according to the stages of the waterfall model. Here is a detailed design plan:
Stage 1: Requirement Analysis and Definition

1. Roles: User, LLM Agent (acting as Business Analyst)
2. Input: User provides an overview of the development task, for example:
   • “I need a tool that can analyze user comment sentiment.”
   • “I want to build a program that can automatically generate code documentation.”
3. LLM Agent Behavior:
   • Actively communicate with the user, asking detailed questions about the requirements, such as target users, functional requirements, performance requirements, data formats, etc.
   • Based on the user’s description, generate a detailed requirement specification document and confirm it with the user.
4. Output: A complete requirement specification document including:
   • Task objective
   • Functional requirements
   • Performance requirements
   • Data format
   • Evaluation metrics

Stage 2: System Design

1. Roles: LLM Agent (acting as System Architect)
2. Input: Requirement specification document
3. LLM Agent Behavior:
   • Based on the requirement specification document, design the architecture of the LLM Agent, including:
     • Prompt template design
     • Data processing flow
     • Evaluation metric calculation methods
   • Generate a system design document and explain the design ideas.
4. Output: A system design document including at least:
   • Prompt template design
   • Data processing flow
   • Evaluation metric calculation methods

Stage 3: Program Coding

1. Roles: LLM Agent (acting as Software Development Engineer)
2. Input: System design document
3. LLM Agent Behavior:
   • Based on the system design document, write code to implement the functions of the LLM Agent, including:
     • Calling LLM model API
     • Implementing prompt templates
     • Writing data processing code
     • Implementing evaluation metric calculation code
4. Output: The code implementation of the LLM Agent

Stage 4: Software Testing

1. Roles: LLM Agent (acting as Test Engineer), User
2. Input: LLM Agent code implementation, test dataset
3. LLM Agent Behavior:
   • Based on the requirement specification document, automatically generate test cases and test the LLM Agent.
   • Generate a test report including test results, evaluation metric scores, etc.
4. User Behavior:
   • You can manually test the LLM Agent based on actual needs and provide feedback.
5. Output: A test report including:
   • Test cases
   • Test results
   • Evaluation metric scores
   • User feedback

Stage 5: Software Deployment

1. Roles: User
2. Input: Tested LLM Agent code
3. User Behavior:
   • You can choose to deploy the LLM Agent to an appropriate environment, for example:
     • Local machine
     • Cloud server
     • API service
4. Output: A runnable LLM Agent

Stage 6: Software Maintenance

1. Roles: User
2. Behavior:
   • Based on actual usage, maintain the LLM Agent, for example:
     • Update training data
     • Optimize prompt templates
     • Improve code implementation
   • Collect user feedback and continuously improve the performance of the LLM Agent.

Simplified Verification Implementation Scheme

Phase 1: Requirements Analysis and Definition

• Roles: User, LLM Agent (acting as Requirements Analyst)
• System Prompt:

1

You are a professional requirements analyst. Your goal is to generate a complete requirements specification document based on the user's input. Do not ask the user any questions. You can and only generate a complete requirements specification document.

• User Prompt:

1

State the problem

Phase 2: System Design

• Roles: LLM Agent (acting as System Architect)
• System Prompt:

1

You are an experienced system architect responsible for designing the software architecture based on the requirements specification document and generating a system design document. Please explain your design thinking and explain the reasons for choosing specific solutions.

• User Prompt:

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5

User Expectations:
{{User}}
The product manager has formed a requirements specification document based on user expectations. Please carefully read the requirements specification document, combine user expectations, and generate system design documents. Explain the design thinking and explain the reasons for choosing specific solutions.
Requirements Specification:
{{Requirement Document}}

Phase 3: Program Coding

• Roles: LLM Agent (acting as Software Development Engineer)
• System Prompt:

1

You are a professional software development engineer responsible for writing code based on the system design document. Respond in English.

• User Prompt:

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5

The architect has formed a system design document based on user expectations. Please carefully read the system design document, combine user expectations, write code to implement, and ensure the quality and readability of the code.
User Expectations:
{{User}}
System Design Document:
{{Architecture Design}}

Phase 4: Software Testing

• Roles: LLM Agent (acting as Test Engineer)
• System Prompt:

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You are a professional test engineer responsible for designing test cases based on the requirements specification document.
Please carefully read the following requirements specification document:
[Insert requirements specification document]
Please design comprehensive test cases to cover all the functionality and performance requirements of the requirements.

• User Prompt:

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The product manager has formed a requirements specification document based on user expectations, and the programmer has written code to implement it. Please carefully read the requirements specification document, combine user expectations, and generate testing.
User Expectations:
{{User}}
Requirements Specification:
{{Requirement Document}}
Code to be tested:
{{Code to be tested}}

Comparative Test

Waterfall Model Agent

Final Output

User

Help me implement a front-end interface for a website for temporary file sharing over a LAN.

AI

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// Using React for demonstration purposes. 
// Adapt to Vue.js or other frameworks as needed.
import React, { useState } from 'react';
import axios from 'axios'; // Or your preferred HTTP client
function App() {
  const [selectedFile, setSelectedFile] = useState(null);
  const [uploadProgress, setUploadProgress] = useState(0);
  const [downloadLink, setDownloadLink] = useState('');
  const [expirationTime, setExpirationTime] = useState(3600); // Default: 1 hour
  const handleFileChange = (event) => {
    setSelectedFile(event.target.files[0]);
  };
  const handleUpload = async () => {
    const formData = new FormData();
    formData.append('file', selectedFile);
    formData.append('expirationTime', expirationTime);
    try {
      const response = await axios.post('/api/upload', formData, {
        onUploadProgress: (progressEvent) => {
          const percentCompleted = Math.round(
            (progressEvent.loaded * 100) / progressEvent.total
          );
          setUploadProgress(percentCompleted);
        },
      });
      setDownloadLink(response.data.downloadLink);
    } catch (error) {
      console.error('Upload failed:', error);
      // Handle upload errors appropriately (e.g., display error message)
    }
  };
  const handleExpirationChange = (event) => {
    setExpirationTime(parseInt(event.target.value, 10));
  };
  return (
    <div className="container">
      <h1>LAN File Sharing</h1>
      {/* File Upload Section */}
      <div className="upload-section">
        <h2>Upload File</h2>
        <input type="file" onChange={handleFileChange} />
        <button onClick={handleUpload} disabled={!selectedFile}>
          Upload
        </button>
        {/* Progress Bar */}
        {uploadProgress > 0 && (
          <div className="progress-bar">
            <div
              className="progress-bar-fill"
              style={{ width: `${uploadProgress}%` }}
            ></div>
          </div>
        )}
      </div>
      {/* File Sharing Section */}
      {downloadLink && (
        <div className="sharing-section">
          <h2>Share File</h2>
          <p>Download Link: {downloadLink}</p>
          {/* Expiration Time Selection */}
          <label htmlFor="expiration">Expiration Time (seconds):</label>
          <input
            type="number"
            id="expiration"
            min="60" // Minimum 1 minute
            value={expirationTime}
            onChange={handleExpirationChange}
          />
        </div>
      )}
    </div>
  );
}
export default App;

Explanation:

1. Import Statements: Imports necessary modules like React, useState hook, and Axios for HTTP requests.
2. State Management: Uses useState hooks to manage component state:
   • selectedFile: Stores the selected file for upload.
   • uploadProgress: Tracks the progress of the file upload.
   • downloadLink: Stores the generated download link after successful upload.
   • expirationTime: Stores the selected expiration time for the shared file.
3. File Selection: The handleFileChange function updates the selectedFile state when a user selects a file.
4. File Upload: The handleUpload function handles the file upload logic:
   • Creates a FormData object to send the file and expiration time to the backend.
   • Makes a POST request to the /api/upload endpoint (replace with your actual backend endpoint).
   • Updates the uploadProgress state based on the upload progress event.
   • Sets the downloadLink state with the link received from the backend upon successful upload.
5. Expiration Time Handling: The handleExpirationChange function updates the expirationTime state when the user changes the expiration time input.
6. UI Rendering:
   • Renders a file upload section with a file input, upload button, and progress bar.
   • Conditionally renders a file sharing section with the download link and expiration time controls once the upload is complete.
     Key Points:

• Backend Integration: This code assumes you have a backend service set up to handle file uploads, storage, and download link generation. You’ll need to replace /api/upload with your actual backend endpoint.
• Error Handling: Basic error handling is included in the handleUpload function. Implement more robust error handling and user feedback mechanisms as needed.
• Security: This code provides a basic implementation and does not include security measures like authentication, authorization, or input validation. Implement appropriate security measures in both your frontend and backend to protect against vulnerabilities.
• Styling: The code uses minimal inline styling for demonstration purposes. Apply your preferred CSS framework or custom styles for a polished look and feel.
  This code provides a solid starting point for building the frontend of your temporary file sharing website. Remember to adapt it to your specific requirements, integrate it with your backend, and implement appropriate security and error handling measures.
  Test Plan for Temporary File Sharing Website Frontend
  This test plan outlines the test cases to be executed to ensure the frontend of the temporary file sharing website meets the requirements outlined in the specification document.
  1. Test Environment:
• Browser Compatibility: Chrome (latest), Firefox (latest), Edge (latest)
• Device Compatibility: Desktop, Tablet, Mobile (responsive design testing)
• Network: Local Area Network (LAN)
  2. Test Data:
• File Types:
  • Documents: .doc, .docx, .pdf, .txt
  • Images: .jpg, .png, .gif
  • Videos: .mp4, .avi
  • Compressed Files: .zip, .rar
• File Sizes:
  • Small (KB)
  • Medium (MB)
  • Large (GB) - Consider limitations based on LAN speed and backend configuration.
• Expiration Times:
  • 1 hour
  • 1 day
  • 1 week
  • No expiration (test warning message)
    3. Test Cases:
    3.1 File Upload Functionality:

• Test Report documenting the test results, including any defects found and their severity.
  5. Test Schedule:
• To be determined based on project timelines and resource availability.
  6. Entry and Exit Criteria:
• Entry Criteria:
  • Frontend codebase ready for testing.
  • Test environment set up.
  • Test data prepared.
• Exit Criteria:
  • All test cases executed.
  • All critical and high-severity defects fixed and verified.
  • Test report finalized.

Product Manager Output

User

Help me implement a front-end interface for a website for temporary file sharing over a LAN.

AI

Temporary File Sharing Website - Frontend Requirements Specification
1. Introduction
This document outlines the functional and non-functional requirements for the front-end interface of a website designed for temporary file sharing over a Local Area Network (LAN).
2. Target Audience
This document is intended for use by the development team responsible for building the front-end interface of the website.
3. Scope
This document covers the user interface and user experience aspects of the website. It does not cover the back-end infrastructure, database design, or security implementation details.
4. Functional Requirements
4.1 File Upload

• 4.1.1 The user should be able to select one or multiple files from their local machine for upload.
• 4.1.2 Supported file types should include, but not be limited to: documents (.doc, .docx, .pdf, .txt), images (.jpg, .png, .gif), videos (.mp4, .avi), and compressed files (.zip, .rar).
• 4.1.3 The user should be able to view the upload progress of each file.
• 4.1.4 The system should provide an estimated time remaining for the upload process.
• 4.1.5 Upon successful upload, a unique download link should be generated for each file.
  4.2 File Sharing
• 4.2.1 The generated download link should be easily copyable to the clipboard.
• 4.2.2 The user should be able to set an optional expiration time for the shared file (e.g., 1 hour, 1 day, 1 week).
• 4.2.3 The system should display a clear warning message if the user attempts to share a file without setting an expiration time.
  4.3 File Download
• 4.3.1 Any user on the same LAN should be able to download the shared file by accessing the unique download link.
• 4.3.2 The download page should display the file name, size, and expiration time (if set).
• 4.3.3 The user should be able to download the file directly by clicking on the download button.
  4.4 User Interface
• 4.4.1 The website should have a clean, intuitive, and user-friendly interface.
• 4.4.2 The design should be responsive and adapt to different screen sizes (desktop, tablet, mobile).
• 4.4.3 The website should use clear and concise language throughout.

5. Non-Functional Requirements
5.1 Performance

• 5.1.1 The website should load quickly and respond to user actions promptly.
• 5.1.2 File uploads and downloads should be efficient and utilize the available bandwidth effectively.
  5.2 Security
• 5.2.1 All file transfers should occur within the LAN and not be exposed to the public internet.
• 5.2.2 Shared files should be inaccessible after their expiration time.
  5.3 Usability
• 5.3.1 The website should be easy to use for users with varying levels of technical expertise.
• 5.3.2 The user interface should provide clear instructions and feedback to the user.
  6. Future Considerations
• 6.1 Implement user authentication to track shared files and download history.
• 6.2 Integrate with cloud storage services for extended file storage options.
• 6.3 Develop a desktop application for easier file sharing.
  7. Glossary
• LAN: Local Area Network
• UI: User Interface
• UX: User Experience
  8. Appendix
  (This section can include wireframes, mockups, or other visual representations of the user interface.)

Architect output

User

User expectation:

1

Help me implement a front-end interface for a website for temporary file sharing over a LAN. 

The product manager has formed a requirement specification based on user expectations. Please carefully read the requirement specification and generate a system design document based on user expectations. Explain the design ideas and explain the reasons for choosing specific solutions.
Requirement Specification Document

1

## Temporary File Sharing Website - Frontend Requirements Specification **1. Introduction** This document outlines the functional and non-functional requirements for the front-end interface of a website designed for temporary file sharing over a Local Area Network (LAN). **2. Target Audience** This document is intended for use by the development team responsible for building the front-end interface of the website. **3. Scope** This document covers the user interface and user experience aspects of the website. It does not cover the back-end infrastructure, database design, or security implementation details. **4. Functional Requirements** **4.1 File Upload** * **4.1.1** The user should be able to select one or multiple files from their local machine for upload. * **4.1.2** Supported file types should include, but not be limited to: documents (.doc, .docx, .pdf, .txt), images (.jpg, .png, .gif), videos (.mp4, .avi), and compressed files (.zip, .rar). * **4.1.3** The user should be able to view the upload progress of each file. * **4.1.4** The system should provide an estimated time remaining for the upload process. * **4.1.5** Upon successful upload, a unique download link should be generated for each file. **4.2 File Sharing** * **4.2.1** The generated download link should be easily copyable to the clipboard. * **4.2.2** The user should be able to set an optional expiration time for the shared file (e.g., 1 hour, 1 day, 1 week). * **4.2.3** The system should display a clear warning message if the user attempts to share a file without setting an expiration time. **4.3 File Download** * **4.3.1** Any user on the same LAN should be able to download the shared file by accessing the unique download link. * **4.3.2** The download page should display the file name, size, and expiration time (if set). * **4.3.3** The user should be able to download the file directly by clicking on the download button. **4.4 User Interface** * **4.4.1** The website should have a clean, intuitive, and user-friendly interface. * **4.4.2** The design should be responsive and adapt to different screen sizes (desktop, tablet, mobile). * **4.4.3** The website should use clear and concise language throughout. **5. Non-Functional Requirements** **5.1 Performance** * **5.1.1** The website should load quickly and respond to user actions promptly. * **5.1.2** File uploads and downloads should be efficient and utilize the available bandwidth effectively. **5.2 Security** * **5.2.1** All file transfers should occur within the LAN and not be exposed to the public internet. * **5.2.2** Shared files should be inaccessible after their expiration time. **5.3 Usability** * **5.3.1** The website should be easy to use for users with varying levels of technical expertise. * **5.3.2** The user interface should provide clear instructions and feedback to the user. **6. Future Considerations** * **6.1** Implement user authentication to track shared files and download history. * **6.2** Integrate with cloud storage services for extended file storage options. * **6.3** Develop a desktop application for easier file sharing. **7. Glossary** * **LAN:** Local Area Network * **UI:** User Interface * **UX:** User Experience **8. Appendix** (This section can include wireframes, mockups, or other visual representations of the user interface.) 

AI

System Design Document - Temporary File Sharing Website (Frontend)
1. Introduction
This document outlines the system design for the front-end of a web application facilitating temporary file sharing within a LAN. The design prioritizes usability, performance, and security while adhering to the provided requirements specification.
2. Architectural Overview
The frontend will be a single-page application (SPA) built using a modern JavaScript framework like React or Vue.js. This choice allows for a dynamic and responsive user experience.
3. Components and Functionality
3.1 File Upload Component

• Technology: HTML5 File API for handling file selection and upload progress tracking.
• Functionality:
  • Drag-and-drop file selection or traditional file picker dialog.
  • Display selected file(s) with name, size, and type.
  • Real-time upload progress bar with estimated time remaining.
  • Upon successful upload:
    • Generate and display a unique, time-limited download link.
    • Option to copy the link to the clipboard.
      3.2 File Sharing Component
• Technology: JavaScript for handling link generation and clipboard functionality.
• Functionality:
  • Display the generated download link prominently.
  • Option to set an expiration time for the shared file using a dropdown or calendar interface.
  • Clear warning message if attempting to share without setting an expiration time.
    3.3 File Download Component
• Technology: Standard HTML anchor tags for download links.
• Functionality:
  • Display file information (name, size, expiration time).
  • Clear call to action for downloading the file.
    3.4 User Interface
• Technology: HTML, CSS, and a JavaScript framework (React or Vue.js).
• Design Considerations:
  • Clean, modern, and intuitive design.
  • Responsive layout adapting to different screen sizes.
  • Clear and concise language.
  • Accessibility considerations (e.g., ARIA attributes).
    4. Technology Stack
• Frontend Framework: React or Vue.js
• Language: JavaScript (or TypeScript for enhanced type safety)
• Styling: CSS framework like Bootstrap or Materialize for responsiveness and pre-built components.
• Build Tools: Webpack or Parcel for bundling and optimization.
  5. Communication and Data Flow
• The frontend will communicate with a backend service (not detailed in this document) for file handling and storage.
• Communication will be primarily through RESTful APIs using JSON for data exchange.
• WebSockets could be considered for real-time updates during file uploads and downloads.
  6. Security Considerations
• Frontend:
  • Input validation to prevent XSS vulnerabilities.
  • Secure handling of download links (e.g., JWT for temporary access).
• Backend (out of scope for this document):
  • Restrict file access to the LAN.
  • Implement proper authentication and authorization if user accounts are introduced in the future.
    7. Performance Considerations
• Optimize asset loading (minification, caching).
• Utilize CDNs for libraries and frameworks.
• Implement lazy loading for images or large files.
• Efficiently handle large file uploads and downloads.
  8. Future Considerations
• User Authentication: Implement user accounts to track shared files and download history.
• Cloud Storage Integration: Allow users to connect to cloud storage services for extended storage options.
• Desktop Application: Develop a desktop application for a more integrated file sharing experience.
  9. Conclusion
  This document has outlined a robust and scalable frontend design for a temporary file sharing website. The chosen technologies and architecture prioritize usability, performance, and security, ensuring a positive user experience. Future iterations can build upon this foundation to incorporate additional features and functionalities.

Software engineer output

User

User expectation:

1

Help me implement a front-end interface for a website for temporary file sharing over a LAN. 

The architect has formed the system design document based on user expectations. Please read the system design document carefully and write code implementation in conjunction with user expectations. Ensure the quality and readability of the code.

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## System Design Document - Temporary File Sharing Website (Frontend)
**1. Introduction**
This document outlines the system design for the front-end of a web application facilitating temporary file sharing within a LAN. The design prioritizes usability, performance, and security while adhering to the provided requirements specification.
**2. Architectural Overview**
The frontend will be a single-page application (SPA) built using a modern JavaScript framework like React or Vue.js. This choice allows for a dynamic and responsive user experience. 
**3. Components and Functionality**
**3.1 File Upload Component**
*   **Technology:** HTML5 File API for handling file selection and upload progress tracking.
*   **Functionality:**
    *   Drag-and-drop file selection or traditional file picker dialog.
    *   Display selected file(s) with name, size, and type.
    *   Real-time upload progress bar with estimated time remaining.
    *   Upon successful upload:
        *   Generate and display a unique, time-limited download link.
        *   Option to copy the link to the clipboard.
**3.2 File Sharing Component**
*   **Technology:** JavaScript for handling link generation and clipboard functionality.
*   **Functionality:**
    *   Display the generated download link prominently.
    *   Option to set an expiration time for the shared file using a dropdown or calendar interface.
    *   Clear warning message if attempting to share without setting an expiration time.
**3.3 File Download Component**
*   **Technology:** Standard HTML anchor tags for download links.
*   **Functionality:**
    *   Display file information (name, size, expiration time).
    *   Clear call to action for downloading the file.
**3.4 User Interface**
*   **Technology:** HTML, CSS, and a JavaScript framework (React or Vue.js).
*   **Design Considerations:**
    *   Clean, modern, and intuitive design.
    *   Responsive layout adapting to different screen sizes.
    *   Clear and concise language.
    *   Accessibility considerations (e.g., ARIA attributes).
**4. Technology Stack**
*   **Frontend Framework:** React or Vue.js
*   **Language:** JavaScript (or TypeScript for enhanced type safety)
*   **Styling:** CSS framework like Bootstrap or Materialize for responsiveness and pre-built components.
*   **Build Tools:** Webpack or Parcel for bundling and optimization.
**5. Communication and Data Flow**
*   The frontend will communicate with a backend service (not detailed in this document) for file handling and storage.
*   Communication will be primarily through RESTful APIs using JSON for data exchange.
*   WebSockets could be considered for real-time updates during file uploads and downloads.
**6. Security Considerations**
*   **Frontend:**
    *   Input validation to prevent XSS vulnerabilities.
    *   Secure handling of download links (e.g., JWT for temporary access).
*   **Backend (out of scope for this document):**
    *   Restrict file access to the LAN.
    *   Implement proper authentication and authorization if user accounts are introduced in the future.
**7. Performance Considerations**
*   Optimize asset loading (minification, caching).
*   Utilize CDNs for libraries and frameworks.
*   Implement lazy loading for images or large files.
*   Efficiently handle large file uploads and downloads.
**8. Future Considerations**
*   **User Authentication:** Implement user accounts to track shared files and download history.
*   **Cloud Storage Integration:** Allow users to connect to cloud storage services for extended storage options.
*   **Desktop Application:** Develop a desktop application for a more integrated file sharing experience.
**9. Conclusion**
This document has outlined a robust and scalable frontend design for a temporary file sharing website. The chosen technologies and architecture prioritize usability, performance, and security, ensuring a positive user experience. Future iterations can build upon this foundation to incorporate additional features and functionalities. 

AI

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// Using React for demonstration purposes. 
// Adapt to Vue.js or other frameworks as needed.
import React, { useState } from 'react';
import axios from 'axios'; // Or your preferred HTTP client
function App() {
  const [selectedFile, setSelectedFile] = useState(null);
  const [uploadProgress, setUploadProgress] = useState(0);
  const [downloadLink, setDownloadLink] = useState('');
  const [expirationTime, setExpirationTime] = useState(3600); // Default: 1 hour
  const handleFileChange = (event) => {
    setSelectedFile(event.target.files[0]);
  };
  const handleUpload = async () => {
    const formData = new FormData();
    formData.append('file', selectedFile);
    formData.append('expirationTime', expirationTime);
    try {
      const response = await axios.post('/api/upload', formData, {
        onUploadProgress: (progressEvent) => {
          const percentCompleted = Math.round(
            (progressEvent.loaded * 100) / progressEvent.total
          );
          setUploadProgress(percentCompleted);
        },
      });
      setDownloadLink(response.data.downloadLink);
    } catch (error) {
      console.error('Upload failed:', error);
      // Handle upload errors appropriately (e.g., display error message)
    }
  };
  const handleExpirationChange = (event) => {
    setExpirationTime(parseInt(event.target.value, 10));
  };
  return (
    <div className="container">
      <h1>LAN File Sharing</h1>
      {/* File Upload Section */}
      <div className="upload-section">
        <h2>Upload File</h2>
        <input type="file" onChange={handleFileChange} />
        <button onClick={handleUpload} disabled={!selectedFile}>
          Upload
        </button>
        {/* Progress Bar */}
        {uploadProgress > 0 && (
          <div className="progress-bar">
            <div
              className="progress-bar-fill"
              style={{ width: `${uploadProgress}%` }}
            ></div>
          </div>
        )}
      </div>
      {/* File Sharing Section */}
      {downloadLink && (
        <div className="sharing-section">
          <h2>Share File</h2>
          <p>Download Link: {downloadLink}</p>
          {/* Expiration Time Selection */}
          <label htmlFor="expiration">Expiration Time (seconds):</label>
          <input
            type="number"
            id="expiration"
            min="60" // Minimum 1 minute
            value={expirationTime}
            onChange={handleExpirationChange}
          />
        </div>
      )}
    </div>
  );
}
export default App;

Explanation:

1. Import Statements: Imports necessary modules like React, useState hook, and Axios for HTTP requests.
2. State Management: Uses useState hooks to manage component state:
   • selectedFile: Stores the selected file for upload.
   • uploadProgress: Tracks the progress of the file upload.
   • downloadLink: Stores the generated download link after successful upload.
   • expirationTime: Stores the selected expiration time for the shared file.
3. File Selection: The handleFileChange function updates the selectedFile state when a user selects a file.
4. File Upload: The handleUpload function handles the file upload logic:
   • Creates a FormData object to send the file and expiration time to the backend.
   • Makes a POST request to the /api/upload endpoint (replace with your actual backend endpoint).
   • Updates the uploadProgress state based on the upload progress event.
   • Sets the downloadLink state with the link received from the backend upon successful upload.
5. Expiration Time Handling: The handleExpirationChange function updates the expirationTime state when the user changes the expiration time input.
6. UI Rendering:
   • Renders a file upload section with a file input, upload button, and progress bar.
   • Conditionally renders a file sharing section with the download link and expiration time controls once the upload is complete.
     Key Points:

• Backend Integration: This code assumes you have a backend service set up to handle file uploads, storage, and download link generation. You’ll need to replace /api/upload with your actual backend endpoint.
• Error Handling: Basic error handling is included in the handleUpload function. Implement more robust error handling and user feedback mechanisms as needed.
• Security: This code provides a basic implementation and does not include security measures like authentication, authorization, or input validation. Implement appropriate security measures in both your frontend and backend to protect against vulnerabilities.
• Styling: The code uses minimal inline styling for demonstration purposes. Apply your preferred CSS framework or custom styles for a polished look and feel.
  This code provides a solid starting point for building the frontend of your temporary file sharing website. Remember to adapt it to your specific requirements, integrate it with your backend, and implement appropriate security and error handling measures.

Test Engineer Output

User

Please translate: The product manager has formed the requirement specification based on user expectations, and the programmer has written the code implementation. Please read the requirement specification carefully and generate tests based on user expectations.
User expectation:

1

Help me implement a front-end interface for a website for temporary file sharing over a LAN. 

Requirement Specification Document ：

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## Temporary File Sharing Website - Frontend Requirements Specification
**1. Introduction**
This document outlines the functional and non-functional requirements for the front-end interface of a website designed for temporary file sharing over a Local Area Network (LAN). 
**2. Target Audience**
This document is intended for use by the development team responsible for building the front-end interface of the website.
**3. Scope**
This document covers the user interface and user experience aspects of the website. It does not cover the back-end infrastructure, database design, or security implementation details.
**4. Functional Requirements**
**4.1 File Upload**
* **4.1.1** The user should be able to select one or multiple files from their local machine for upload.
* **4.1.2** Supported file types should include, but not be limited to: documents (.doc, .docx, .pdf, .txt), images (.jpg, .png, .gif), videos (.mp4, .avi), and compressed files (.zip, .rar).
* **4.1.3** The user should be able to view the upload progress of each file.
* **4.1.4** The system should provide an estimated time remaining for the upload process.
* **4.1.5** Upon successful upload, a unique download link should be generated for each file.
**4.2 File Sharing**
* **4.2.1** The generated download link should be easily copyable to the clipboard.
* **4.2.2** The user should be able to set an optional expiration time for the shared file (e.g., 1 hour, 1 day, 1 week).
* **4.2.3** The system should display a clear warning message if the user attempts to share a file without setting an expiration time.
**4.3 File Download**
* **4.3.1** Any user on the same LAN should be able to download the shared file by accessing the unique download link.
* **4.3.2** The download page should display the file name, size, and expiration time (if set).
* **4.3.3** The user should be able to download the file directly by clicking on the download button.
**4.4 User Interface**
* **4.4.1** The website should have a clean, intuitive, and user-friendly interface.
* **4.4.2** The design should be responsive and adapt to different screen sizes (desktop, tablet, mobile).
* **4.4.3** The website should use clear and concise language throughout.
**5. Non-Functional Requirements**
**5.1 Performance**
* **5.1.1** The website should load quickly and respond to user actions promptly.
* **5.1.2** File uploads and downloads should be efficient and utilize the available bandwidth effectively.
**5.2 Security**
* **5.2.1** All file transfers should occur within the LAN and not be exposed to the public internet.
* **5.2.2** Shared files should be inaccessible after their expiration time.
**5.3 Usability**
* **5.3.1** The website should be easy to use for users with varying levels of technical expertise.
* **5.3.2** The user interface should provide clear instructions and feedback to the user.
**6. Future Considerations**
* **6.1** Implement user authentication to track shared files and download history.
* **6.2** Integrate with cloud storage services for extended file storage options.
* **6.3** Develop a desktop application for easier file sharing.
**7. Glossary**
* **LAN:** Local Area Network
* **UI:** User Interface
* **UX:** User Experience
**8. Appendix**
(This section can include wireframes, mockups, or other visual representations of the user interface.) 

Code to be tested:

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```javascript
// Using React for demonstration purposes. 
// Adapt to Vue.js or other frameworks as needed.
import React, { useState } from 'react';
import axios from 'axios'; // Or your preferred HTTP client
function App() {
  const [selectedFile, setSelectedFile] = useState(null);
  const [uploadProgress, setUploadProgress] = useState(0);
  const [downloadLink, setDownloadLink] = useState('');
  const [expirationTime, setExpirationTime] = useState(3600); // Default: 1 hour
  const handleFileChange = (event) => {
    setSelectedFile(event.target.files[0]);
  };
  const handleUpload = async () => {
    const formData = new FormData();
    formData.append('file', selectedFile);
    formData.append('expirationTime', expirationTime);
    try {
      const response = await axios.post('/api/upload', formData, {
        onUploadProgress: (progressEvent) => {
          const percentCompleted = Math.round(
            (progressEvent.loaded * 100) / progressEvent.total
          );
          setUploadProgress(percentCompleted);
        },
      });
      setDownloadLink(response.data.downloadLink);
    } catch (error) {
      console.error('Upload failed:', error);
      // Handle upload errors appropriately (e.g., display error message)
    }
  };
  const handleExpirationChange = (event) => {
    setExpirationTime(parseInt(event.target.value, 10));
  };
  return (
    <div className="container">
      <h1>LAN File Sharing</h1>
      {/* File Upload Section */}
      <div className="upload-section">
        <h2>Upload File</h2>
        <input type="file" onChange={handleFileChange} />
        <button onClick={handleUpload} disabled={!selectedFile}>
          Upload
        </button>
        {/* Progress Bar */}
        {uploadProgress > 0 && (
          <div className="progress-bar">
            <div
              className="progress-bar-fill"
              style={{ width: `${uploadProgress}%` }}
            ></div>
          </div>
        )}
      </div>
      {/* File Sharing Section */}
      {downloadLink && (
        <div className="sharing-section">
          <h2>Share File</h2>
          <p>Download Link: {downloadLink}</p>
          {/* Expiration Time Selection */}
          <label htmlFor="expiration">Expiration Time (seconds):</label>
          <input
            type="number"
            id="expiration"
            min="60" // Minimum 1 minute
            value={expirationTime}
            onChange={handleExpirationChange}
          />
        </div>
      )}
    </div>
  );
}
export default App;
**Explanation:**
1. **Import Statements:** Imports necessary modules like React, useState hook, and Axios for HTTP requests.
2. **State Management:** Uses `useState` hooks to manage component state:
   - `selectedFile`: Stores the selected file for upload.
   - `uploadProgress`: Tracks the progress of the file upload.
   - `downloadLink`: Stores the generated download link after successful upload.
   - `expirationTime`: Stores the selected expiration time for the shared file.
3. **File Selection:** The `handleFileChange` function updates the `selectedFile` state when a user selects a file.
4. **File Upload:** The `handleUpload` function handles the file upload logic:
   - Creates a `FormData` object to send the file and expiration time to the backend.
   - Makes a POST request to the `/api/upload` endpoint (replace with your actual backend endpoint).
   - Updates the `uploadProgress` state based on the upload progress event.
   - Sets the `downloadLink` state with the link received from the backend upon successful upload.
5. **Expiration Time Handling:** The `handleExpirationChange` function updates the `expirationTime` state when the user changes the expiration time input.
6. **UI Rendering:**
   - Renders a file upload section with a file input, upload button, and progress bar.
   - Conditionally renders a file sharing section with the download link and expiration time controls once the upload is complete.
**Key Points:**
- **Backend Integration:** This code assumes you have a backend service set up to handle file uploads, storage, and download link generation. You'll need to replace `/api/upload` with your actual backend endpoint.
- **Error Handling:** Basic error handling is included in the `handleUpload` function. Implement more robust error handling and user feedback mechanisms as needed.
- **Security:** This code provides a basic implementation and does not include security measures like authentication, authorization, or input validation. Implement appropriate security measures in both your frontend and backend to protect against vulnerabilities.
- **Styling:** The code uses minimal inline styling for demonstration purposes. Apply your preferred CSS framework or custom styles for a polished look and feel.
This code provides a solid starting point for building the frontend of your temporary file sharing website. Remember to adapt it to your specific requirements, integrate it with your backend, and implement appropriate security and error handling measures. 

AI

Test Plan for Temporary File Sharing Website Frontend
This test plan outlines the test cases to be executed to ensure the frontend of the temporary file sharing website meets the requirements outlined in the specification document.
1. Test Environment:

• Browser Compatibility: Chrome (latest), Firefox (latest), Edge (latest)
• Device Compatibility: Desktop, Tablet, Mobile (responsive design testing)
• Network: Local Area Network (LAN)
  2. Test Data:
• File Types:
  • Documents: .doc, .docx, .pdf, .txt
  • Images: .jpg, .png, .gif
  • Videos: .mp4, .avi
  • Compressed Files: .zip, .rar
• File Sizes:
  • Small (KB)
  • Medium (MB)
  • Large (GB) - Consider limitations based on LAN speed and backend configuration.
• Expiration Times:
  • 1 hour
  • 1 day
  • 1 week
  • No expiration (test warning message)
    3. Test Cases:
    3.1 File Upload Functionality:

3.2 File Sharing Functionality:

• Test Report documenting the test results, including any defects found and their severity.
  5. Test Schedule:
• To be determined based on project timelines and resource availability.
  6. Entry and Exit Criteria:
• Entry Criteria:
  • Frontend codebase ready for testing.
  • Test environment set up.
  • Test data prepared.
• Exit Criteria:
  • All test cases executed.
  • All critical and high-severity defects fixed and verified.
  • Test report finalized.

LLM replies directly

Direct output

User

Help me implement a front-end interface for a website for temporary file sharing over a LAN.

AI

Okay, I can help you outline the front-end implementation for a LAN file-sharing website. Here’s a breakdown of the structure, technologies, and considerations:
I. Technologies

• HTML, CSS, JavaScript: The core web technologies for structure, styling, and interactivity.
• WebRTC (Peer-to-Peer Communication): Enables direct browser-to-browser communication within the LAN, eliminating the need for a central server to handle file transfers.
• WebSocket (Optional): Can be used for signaling and establishing the initial WebRTC connection between peers.
  II. Front-End Structure (Simplified)

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<!DOCTYPE html>
<html>
<head>
  <title>LAN File Share</title>
  <link rel="stylesheet" href="style.css">
</head>
<body>
  <div id="file-drop-area">
    <h2>Drag and Drop Files Here</h2>
    <input type="file" id="file-input" multiple>
  </div>
  <div id="peer-list">
    <h3>Connected Devices:</h3>
    <ul>
      </ul>
  </div>
  <script src="script.js"></script>
</body>
</html>

III. JavaScript Functionality (script.js)

1. File Selection and Handling:
   • Listen for “drag and drop” events or file selections using the <input type="file"> element.
   • Use the File API to access file data (name, size, type, blob).
2. Peer Discovery and Connection (WebRTC):
   • Signaling Server (Optional):
     • Use a simple WebSocket server (e.g., Node.js with ws or socket.io) to handle peer discovery within the LAN.
     • Peers connect to the signaling server and exchange connection information (IP addresses, port numbers).
   • Peer-to-Peer Connection:
     • Use the RTCPeerConnection API to establish a direct connection between peers.
     • Exchange ICE candidates (network path information) to find the best route for data transfer.
3. File Transfer (WebRTC Data Channels):
   • Create a reliable RTCDataChannel between connected peers.
   • Chunk the file data into smaller pieces for efficient transfer.
   • Send file chunks over the data channel.
   • Implement error handling and retransmission logic for reliable transfer.
4. Progress Display and User Interface:
   • Display a list of connected peers.
   • Show file transfer progress (upload/download).
   • Provide feedback messages (success, errors).
     IV. Code Example (Conceptual)

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// ... (File handling and UI logic) ...
// WebRTC setup (simplified)
const peerConnection = new RTCPeerConnection();
// Handle ICE candidate exchange
peerConnection.onicecandidate = (event) => {
  if (event.candidate) {
    // Send candidate to the signaling server
  }
};
// Create data channel
const dataChannel = peerConnection.createDataChannel('fileTransfer');
// Handle data channel events (open, close, message)
dataChannel.onopen = () => {
  // Start sending file chunks
};
dataChannel.onmessage = (event) => {
  // Receive and assemble file chunks
};
// ... (File chunking and transfer logic) ...

V. Additional Considerations

• Security: Implement security measures to prevent unauthorized access and file sharing within the LAN. Consider using HTTPS for the website and encrypting data during transfer.
• File Size Limits: Handle large file transfers efficiently and set appropriate limits to prevent network congestion.
• Browser Compatibility: Test your implementation across different browsers and devices on your LAN.
• User Experience: Design a user-friendly interface with clear instructions and progress indicators.

许可协议

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