hotfix HttpContext NullReferenceException

[yileicn]

PR Type

Bug fix

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Description

• Fix NullReferenceException when HttpContext is unavailable

• Replace direct HttpContext access with safe null-coalescing pattern

• Use Context.GetHttpContext() for proper SignalR context retrieval

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Diagram Walkthrough

flowchart LR
  A["Direct _context.HttpContext access"] -->|"causes NullReferenceException"| B["Unsafe code path"]
  C["Context.GetHttpContext() with null-coalescing"] -->|"safely handles null"| D["Robust code path"]

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File Walkthrough

Relevant files

Bug fix

SignalRHub.cs Safe HttpContext access with null-coalescing operators      src/Plugins/BotSharp.Plugin.ChatHub/SignalRHub.cs Replace direct _context.HttpContext access with Context.GetHttpContext() method call Use null-coalescing operator (?.) for safe property access on potentially null HttpContext Extract conversationId using safe query parameter retrieval with FirstOrDefault() Prevent NullReferenceException when HttpContext is unavailable in SignalR connections +2/-1

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[qodo-merge-pro]

PR Compliance Guide 🔍

(Compliance updated until commit 078d685)

Below is a summary of compliance checks for this PR:

Security Compliance
🟢	No security concerns identified No security vulnerabilities detected by AI analysis. Human verification advised for critical code.
Ticket Compliance
⚪	🎫 No ticket provided Create ticket/issue
Codebase Duplication Compliance
⚪	Codebase context is not defined Follow the guide to enable codebase context checks.
Custom Compliance
🟢	Generic: Meaningful Naming and Self-Documenting Code Objective: Ensure all identifiers clearly express their purpose and intent, making code self-documenting Status: Passed Learn more about managing compliance generic rules or creating your own custom rules
	Generic: Security-First Input Validation and Data Handling Objective: Ensure all data inputs are validated, sanitized, and handled securely to prevent vulnerabilities Status: Passed Learn more about managing compliance generic rules or creating your own custom rules
⚪	Generic: Comprehensive Audit Trails Objective: To create a detailed and reliable record of critical system actions for security analysis and compliance. Status: Logging context: New code adds logging about connections but does not clearly include all required audit fields (e.g., explicit user ID and outcome) for a critical connect event. Referred Code public override async Task OnConnectedAsync() { _logger.LogInformation($"SignalR Hub: {_user.FirstName} {_user.LastName} ({Context.User.Identity.Name}) connected in {Context.ConnectionId}"); var convService = _services.GetRequiredService<IConversationService>(); var httpContext = Context.GetHttpContext(); string? conversationId = httpContext?.Request?.Query["conversation-id"].FirstOrDefault(); if (!string.IsNullOrEmpty(conversationId)) { _logger.LogInformation($"Connection {Context.ConnectionId} is with conversation {conversationId}"); Learn more about managing compliance generic rules or creating your own custom rules
	Generic: Robust Error Handling and Edge Case Management Objective: Ensure comprehensive error handling that provides meaningful context and graceful degradation Status: Null handling: While null-coalescing access is added for HttpContext and query, there is no handling/logging for the case when conversation-id is missing or malformed to aid debugging. Referred Code var httpContext = Context.GetHttpContext(); string? conversationId = httpContext?.Request?.Query["conversation-id"].FirstOrDefault(); if (!string.IsNullOrEmpty(conversationId)) { Learn more about managing compliance generic rules or creating your own custom rules
	Generic: Secure Error Handling Objective: To prevent the leakage of sensitive system information through error messages while providing sufficient detail for internal debugging. Status: Sensitive logging: Logs include personal identifiers (first and last name) which may be considered sensitive depending on policy, and exposure in user-visible contexts is unclear. Referred Code _logger.LogInformation($"SignalR Hub: {_user.FirstName} {_user.LastName} ({Context.User.Identity.Name}) connected in {Context.ConnectionId}"); Learn more about managing compliance generic rules or creating your own custom rules
	Generic: Secure Logging Practices Objective: To ensure logs are useful for debugging and auditing without exposing sensitive information like PII, PHI, or cardholder data. Status: PII in logs: Logging of _user.FirstName, _user.LastName, and Context.User.Identity.Name may include PII; consider redaction or user IDs depending on logging policy. Referred Code _logger.LogInformation($"SignalR Hub: {_user.FirstName} {_user.LastName} ({Context.User.Identity.Name}) connected in {Context.ConnectionId}"); Learn more about managing compliance generic rules or creating your own custom rules

Compliance status legend

🟢 - Fully Compliant
🟡 - Partial Compliant
🔴 - Not Compliant
⚪ - Requires Further Human Verification
🏷️ - Compliance label

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Previous compliance checks

Compliance check up to commit 078d685

Security Compliance
🟢	No security concerns identified No security vulnerabilities detected by AI analysis. Human verification advised for critical code.
Ticket Compliance
⚪	🎫 No ticket provided Create ticket/issue
Codebase Duplication Compliance
⚪	Codebase context is not defined Follow the guide to enable codebase context checks.
Custom Compliance
🟢	Generic: Meaningful Naming and Self-Documenting Code Objective: Ensure all identifiers clearly express their purpose and intent, making code self-documenting Status: Passed Learn more about managing compliance generic rules or creating your own custom rules
	Generic: Robust Error Handling and Edge Case Management Objective: Ensure comprehensive error handling that provides meaningful context and graceful degradation Status: Passed Learn more about managing compliance generic rules or creating your own custom rules
	Generic: Secure Error Handling Objective: To prevent the leakage of sensitive system information through error messages while providing sufficient detail for internal debugging. Status: Passed Learn more about managing compliance generic rules or creating your own custom rules
⚪	Generic: Comprehensive Audit Trails Objective: To create a detailed and reliable record of critical system actions for security analysis and compliance. Status: Action logging: The new code logs connection events and conversation linkage but does not clearly ensure that all critical actions are logged with user ID, timestamp, and outcome; additional context may be provided elsewhere and needs verification. Referred Code _logger.LogInformation($"SignalR Hub: {_user.FirstName} {_user.LastName} ({Context.User.Identity.Name}) connected in {Context.ConnectionId}"); var convService = _services.GetRequiredService<IConversationService>(); var httpContext = Context.GetHttpContext(); string? conversationId = httpContext?.Request?.Query["conversation-id"].FirstOrDefault(); if (!string.IsNullOrEmpty(conversationId)) { _logger.LogInformation($"Connection {Context.ConnectionId} is with conversation {conversationId}"); Learn more about managing compliance generic rules or creating your own custom rules
	Generic: Secure Logging Practices Objective: To ensure logs are useful for debugging and auditing without exposing sensitive information like PII, PHI, or cardholder data. Status: PII in logs: The log message includes the user's first and last name and identity name, which may be considered PII; verify policy compliance or redact in logs. Referred Code _logger.LogInformation($"SignalR Hub: {_user.FirstName} {_user.LastName} ({Context.User.Identity.Name}) connected in {Context.ConnectionId}"); Learn more about managing compliance generic rules or creating your own custom rules
	Generic: Security-First Input Validation and Data Handling Objective: Ensure all data inputs are validated, sanitized, and handled securely to prevent vulnerabilities Status: Input validation: The query parameter 'conversation-id' is read and used for logging without visible validation or authorization checks in this diff; validation may exist elsewhere and needs verification. Referred Code string? conversationId = httpContext?.Request?.Query["conversation-id"].FirstOrDefault(); if (!string.IsNullOrEmpty(conversationId)) { _logger.LogInformation($"Connection {Context.ConnectionId} is with conversation {conversationId}"); Learn more about managing compliance generic rules or creating your own custom rules

[qodo-merge-pro]

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