You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Refactored cancellation token handling with separate operation and lock tokens
Added configurable timeout seconds for code execution (defaults to 3 seconds)
Renamed UseMutex to UseLock and CancellationToken to OperationToken for clarity
Removed redundant token cancellation check in Python GIL context
Diagram Walkthrough
flowchart LR
A["CodeInterpretOptions"] -->|"UseLock + OperationToken"| B["PyCodeInterpreter"]
C["CodeInstructOptions"] -->|"TimeoutSeconds"| D["InstructService"]
D -->|"configurable timeout"| B
B -->|"LockToken for mutex"| E["Executor"]
Below is a summary of compliance checks for this PR:
Security Compliance
⚪
Arbitrary code execution
Description: Running arbitrary Python code via PythonEngine.Exec with captured stdout/stderr can execute untrusted input without sandboxing, allowing arbitrary code execution if the input is user-controlled. PyCodeInterpreter.cs [143-216]
Referred Code
varexecTask=Task.Factory.StartNew(()=>{using(Py.GIL()){// Import necessary Python modulesdynamicsys=Py.Import("sys");dynamicio=Py.Import("io");try{// Redirect standard output/error to capture itdynamicoutIO=io.StringIO();dynamicerrIO=io.StringIO();sys.stdout=outIO;sys.stderr=errIO;// Set global itemsusingvarglobals=newPyDict();if(codeScript.Contains("__main__")==true){globals.SetItem("__name__",newPyString("__main__"));
...(clipped 53lines)
Command execution risk
Description: Spawning an external python process to run provided code without sandboxing or path restrictions enables arbitrary command/code execution if codeScript is user-controlled. PyCodeInterpreter.cs [221-280]
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
⚪
Generic: Comprehensive Audit Trails
Objective: To create a detailed and reliable record of critical system actions for security analysis and compliance.
Status: Missing audit logs: New code executes scripts and external processes without adding explicit audit logging of who initiated the action, parameters used, and outcomes.
Referred Code
catch(Exceptionex){_logger.LogError(ex,$"Error when executing code script ({scriptName}) in {nameof(InnerRunCode)} in {Provider}.");response.ErrorMsg=ex.Message;returnresponse;}}privateasyncTask<CodeInterpretResponse>CoreRunScript(stringcodeScript,CodeInterpretOptions?options=null,CancellationTokencancellationToken=default){_logger.LogWarning($"Begin {nameof(CoreRunScript)} in {Provider}: ${options?.ScriptName}");cancellationToken.ThrowIfCancellationRequested();varexecTask=Task.Factory.StartNew(()=>{using(Py.GIL()){// Import necessary Python modulesdynamicsys=Py.Import("sys");dynamicio=Py.Import("io");
...(clipped 67lines)
Generic: Robust Error Handling and Edge Case Management
Objective: Ensure comprehensive error handling that provides meaningful context and graceful degradation
Status: Generic error message: Exceptions in CoreRunScript return only ex.Message without additional actionable context (e.g., script name, arguments), which may hinder debugging.
Referred Code
cancellationToken.ThrowIfCancellationRequested();returnnewCodeInterpretResponse{Result=stdout?.TrimEnd('\r','\n')??string.Empty,Success=true};}catch(Exceptionex){_logger.LogError(ex,$"Error in {nameof(CoreRunScript)} in {Provider}.");returnnew(){ErrorMsg=ex.Message};}
Generic: Secure Error Handling
Objective: To prevent the leakage of sensitive system information through error messages while providing sufficient detail for internal debugging.
Status: Error exposure risk: ToString now prefers ErrorMsg when Result is empty, which could surface internal error details to user-facing contexts depending on how ToString is used.
Objective: To ensure logs are useful for debugging and auditing without exposing sensitive information like PII, PHI, or cardholder data.
Status: Potential PII logging: Logging of script names and errors may inadvertently include sensitive data from codeScript or arguments without redaction.
Referred Code
varscriptName=options?.ScriptName??codeScript.SubstringMax(30);try{_logger.LogWarning($"Begin running python code script in {Provider}: {scriptName}");if(options?.UseProcess==true){response=awaitCoreRunProcess(codeScript,options,cancellationToken);}else{response=awaitCoreRunScript(codeScript,options,cancellationToken);}_logger.LogWarning($"End running python code script in {Provider}: {scriptName}");returnresponse;
Generic: Security-First Input Validation and Data Handling
Objective: Ensure all data inputs are validated, sanitized, and handled securely to prevent vulnerabilities
Status: Unvalidated input: The interpreter executes arbitrary codeScript and spawns a python process without explicit validation or sanitization of inputs/arguments in the new paths.
Referred Code
privateasyncTask<CodeInterpretResponse>CoreRunScript(stringcodeScript,CodeInterpretOptions?options=null,CancellationTokencancellationToken=default){_logger.LogWarning($"Begin {nameof(CoreRunScript)} in {Provider}: ${options?.ScriptName}");cancellationToken.ThrowIfCancellationRequested();varexecTask=Task.Factory.StartNew(()=>{using(Py.GIL()){// Import necessary Python modulesdynamicsys=Py.Import("sys");dynamicio=Py.Import("io");try{// Redirect standard output/error to capture itdynamicoutIO=io.StringIO();dynamicerrIO=io.StringIO();sys.stdout=outIO;sys.stderr=errIO;
...(clipped 59lines)
Compliance status legend
🟢 - Fully Compliant
🟡 - Partial Compliant
🔴 - Not Compliant
⚪ - Requires Further Human Verification
🏷️ - Compliance label
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: Secure Error Handling
Objective: To prevent the leakage of sensitive system information through error messages while providing sufficient detail for internal debugging.
Status: Passed
⚪
Generic: Comprehensive Audit Trails
Objective: To create a detailed and reliable record of critical system actions for security analysis and compliance.
Status: Missing audit logs: New execution timeout handling and code execution calls are added without any corresponding audit logging of who performed the action, what was run, and the outcome.
Generic: Meaningful Naming and Self-Documenting Code
Objective: Ensure all identifiers clearly express their purpose and intent, making code self-documenting
Status: Ambiguous naming: The properties UseLock and LockToken are generic and may not clearly convey their specific concurrency scope or purpose compared to the prior UseMutex/CancellationToken naming.
Generic: Robust Error Handling and Edge Case Management
Objective: Ensure comprehensive error handling that provides meaningful context and graceful degradation
Status: Timeout handling: A configurable timeout is introduced but there is no visible catch/log for OperationCanceledException or handling for invalid TimeoutSeconds (e.g., negative or zero), which may lead to silent or unclear failures.
Objective: To ensure logs are useful for debugging and auditing without exposing sensitive information like PII, PHI, or cardholder data.
Status: Log context risk: The warning log includes ScriptName which could contain sensitive context; without sanitization this may risk exposing sensitive details in logs.
Referred Code
_logger.LogWarning($"Begin {nameof(CoreRunScript)} in {Provider}: ${options?.ScriptName}");vartoken=options?.OperationToken??CancellationToken.None;
Generic: Security-First Input Validation and Data Handling
Objective: Ensure all data inputs are validated, sanitized, and handled securely to prevent vulnerabilities
Status: Unvalidated input: The newly added TimeoutSeconds from external options is used directly to construct a CancellationTokenSource without validation of bounds which could cause unexpected behavior.
Replace Task.Factory.StartNew with Task.Run for better task scheduling and update the logic to use the script's stderr output to correctly determine the success status and error message of the execution.
private async Task<CodeInterpretResponse> CoreRunScript(string codeScript, CodeInterpretOptions? options = null, CancellationToken cancellationToken = default)
{
cancellationToken.ThrowIfCancellationRequested();
- var execTask = Task.Factory.StartNew(() =>+ var execTask = Task.Run(() =>
{
using (Py.GIL())
{
// Import necessary Python modules
dynamic sys = Py.Import("sys");
dynamic io = Py.Import("io");
try
{
// Redirect standard output/error to capture it
dynamic outIO = io.StringIO();
dynamic errIO = io.StringIO();
sys.stdout = outIO;
sys.stderr = errIO;
// Set global items
using var globals = new PyDict();
if (codeScript.Contains("__main__") == true)
{
globals.SetItem("__name__", new PyString("__main__"));
}
// Set arguments
var list = new PyList();
if (options?.Arguments?.Any() == true)
{
list.Append(new PyString(options?.ScriptName ?? "script.py"));
foreach (var arg in options!.Arguments)
{
if (!string.IsNullOrWhiteSpace(arg.Key) && !string.IsNullOrWhiteSpace(arg.Value))
{
list.Append(new PyString($"--{arg.Key}"));
list.Append(new PyString($"{arg.Value}"));
}
}
}
sys.argv = list;
cancellationToken.ThrowIfCancellationRequested();
// Execute Python script
PythonEngine.Exec(codeScript, globals);
// Get result
var stdout = outIO.getvalue()?.ToString() as string;
var stderr = errIO.getvalue()?.ToString() as string;
cancellationToken.ThrowIfCancellationRequested();
return new CodeInterpretResponse
{
Result = stdout?.TrimEnd('\r', '\n') ?? string.Empty,
- Success = true+ ErrorMsg = string.IsNullOrWhiteSpace(stderr) ? null : stderr,+ Success = string.IsNullOrWhiteSpace(stderr)
};
}
catch (Exception ex)
{
_logger.LogError(ex, $"Error in {nameof(CoreRunScript)} in {Provider}.");
- return new() { ErrorMsg = ex.Message };+ return new CodeInterpretResponse { Success = false, ErrorMsg = ex.Message };
}
finally
{
// Restore the original stdout/stderr/argv
sys.stdout = sys.__stdout__;
sys.stderr = sys.__stderr__;
sys.argv = new PyList();
}
- };+ }
}, cancellationToken);
return await execTask.WaitAsync(cancellationToken);
}
Apply / Chat
Suggestion importance[1-10]: 8
__
Why: The suggestion correctly identifies a bug where Python script errors written to stderr are ignored, leading to incorrect success reporting. It also recommends best practices by replacing Task.Factory.StartNew with Task.Run.
Medium
Possible issue
Surface stderr and set failure
Check if stderr contains content after Python script execution. If it does, set the response's Success flag to false and populate ErrorMsg with the stderr content to correctly report failures.
dynamic outIO = io.StringIO();
dynamic errIO = io.StringIO();
sys.stdout = outIO;
sys.stderr = errIO;
...
// Execute Python script
PythonEngine.Exec(codeScript, globals);
...
var stdout = outIO.getvalue()?.ToString() as string;
var stderr = errIO.getvalue()?.ToString() as string;
...
+var hasError = !string.IsNullOrWhiteSpace(stderr);
return new CodeInterpretResponse
{
- Result = stdout?.TrimEnd('\r', '\n') ?? string.Empty,- Success = true+ Result = (stdout ?? string.Empty).TrimEnd('\r', '\n'),+ ErrorMsg = hasError ? stderr : null,+ Success = !hasError
};
[To ensure code accuracy, apply this suggestion manually]
Suggestion importance[1-10]: 8
__
Why: This suggestion correctly identifies a bug where Python script errors written to stderr are ignored, leading to incorrect success reporting. Implementing this change is critical for correctly handling and surfacing script execution failures.
Medium
Resolve Python interpreter robustly
Instead of hardcoding the python executable name, dynamically resolve the path. First, check for a PYTHON_EXE environment variable, then probe for common names like python3 and python to improve cross-platform compatibility.
Why: The suggestion improves robustness by not relying on a hardcoded "python" executable, which enhances cross-platform compatibility. The proposed implementation is a reasonable approach to dynamically find the correct Python interpreter.
Medium
Learned best practice
Clamp and validate timeout seconds
Clamp TimeoutSeconds to a reasonable upper bound and handle nulls safely to prevent excessively long or invalid timeouts.
-var seconds = codeOptions?.TimeoutSeconds > 0 ? codeOptions.TimeoutSeconds.Value : 3;-using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(seconds));+var seconds = codeOptions?.TimeoutSeconds is > 0 ? codeOptions.TimeoutSeconds.Value : 3;+var clamped = Math.Min(seconds, 300);+using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(clamped));
Apply / Chat
Suggestion importance[1-10]: 6
__
Why:
Relevant best practice - Validate inputs and default to safe fallbacks; ensure timeouts are clamped to sane ranges to avoid extreme values.
Low
General
Make ToString null-safe
Refactor the ToString() method to be more robust by using standard string.IsNullOrEmpty checks instead of relying on the custom IfNullOrEmptyAs extension method and the null-forgiving operator (!).
public override string ToString()
{
- return Result.IfNullOrEmptyAs(ErrorMsg ?? $"Success: {Success}")!;+ var result = Result;+ if (string.IsNullOrEmpty(result))+ {+ result = !string.IsNullOrEmpty(ErrorMsg) ? ErrorMsg! : $"Success: {Success}";+ }+ return result;
}
Apply / Chat
Suggestion importance[1-10]: 3
__
Why: The suggestion proposes a more defensive implementation for ToString(), which is a good practice. However, it replaces a concise, custom extension method with more verbose standard checks, which might be a stylistic trade-off rather than a critical fix.
✅ Ensure cleanup on cancellationSuggestion Impact:The commit changed how the background task is started, moving away from Task.Run; this aligns with the suggestion’s goal of adjusting task creation to avoid direct cancellation of the inner task, helping ensure cleanup runs.
code diff:
- var execTask = Task.Run(() =>+ var execTask = Task.Factory.StartNew(() =>
{
Refactor the task cancellation logic to ensure the finally block always executes, preventing the Python interpreter's state from being left corrupted upon cancellation. This involves removing the cancellation token from Task.Run and handling cancellation exceptions from WaitAsync to allow for cleanup.
private async Task<CodeInterpretResponse> CoreRunScript(string codeScript, CodeInterpretOptions? options = null, CancellationToken cancellationToken = default)
{
cancellationToken.ThrowIfCancellationRequested();
var execTask = Task.Run(() =>
{
using (Py.GIL())
{
- // Import necessary Python modules
dynamic sys = Py.Import("sys");
dynamic io = Py.Import("io");
try
{
- // Redirect standard output/error to capture it
dynamic outIO = io.StringIO();
dynamic errIO = io.StringIO();
sys.stdout = outIO;
sys.stderr = errIO;
- // Set global items
using var globals = new PyDict();
if (codeScript.Contains("__main__") == true)
{
globals.SetItem("__name__", new PyString("__main__"));
}
- // Set arguments
var list = new PyList();
if (options?.Arguments?.Any() == true)
{
list.Append(new PyString(options?.ScriptName ?? "script.py"));
foreach (var arg in options!.Arguments)
{
if (!string.IsNullOrWhiteSpace(arg.Key) && !string.IsNullOrWhiteSpace(arg.Value))
{
list.Append(new PyString($"--{arg.Key}"));
list.Append(new PyString($"{arg.Value}"));
}
}
}
sys.argv = list;
- cancellationToken.ThrowIfCancellationRequested();+ // cooperative cancellation point before exec+ if (cancellationToken.IsCancellationRequested)+ {+ cancellationToken.ThrowIfCancellationRequested();+ }- // Execute Python script
PythonEngine.Exec(codeScript, globals);
- // Get result
var stdout = outIO.getvalue()?.ToString() as string;
- var stderr = errIO.getvalue()?.ToString() as string;- cancellationToken.ThrowIfCancellationRequested();+ // cooperative cancellation after exec+ if (cancellationToken.IsCancellationRequested)+ {+ cancellationToken.ThrowIfCancellationRequested();+ }
return new CodeInterpretResponse
{
Result = stdout?.TrimEnd('\r', '\n') ?? string.Empty,
Success = true
};
}
catch (Exception ex)
{
_logger.LogError(ex, $"Error in {nameof(CoreRunScript)} in {Provider}.");
return new() { ErrorMsg = ex.Message };
}
finally
{
- // Restore the original stdout/stderr/argv
sys.stdout = sys.__stdout__;
sys.stderr = sys.__stderr__;
sys.argv = new PyList();
}
- };- }, cancellationToken);+ }+ }); // do not pass cancellationToken here- return await execTask.WaitAsync(cancellationToken);+ try+ {+ return await execTask.WaitAsync(cancellationToken);+ }+ catch (OperationCanceledException)+ {+ // Ensure the inner task completes cleanup+ try { await execTask; } catch { /* ignored: already logged */ }+ throw;+ }
}
Suggestion importance[1-10]: 8
__
Why: The suggestion correctly identifies a critical race condition where task cancellation could prevent the finally block from executing, leaving the Python interpreter's state corrupted. The proposed fix ensures cleanup always runs, which is a major correctness improvement.
Medium
Possible issue
Enforce executor path for safety
To prevent potential race conditions and crashes from unsynchronized Python GIL access, route all code execution through the _executor regardless of the UseLock option. This ensures proper concurrency management.
Why: The suggestion correctly identifies a potential race condition by bypassing the _executor when UseLock is false, which could lead to unsafe concurrent access to the Python GIL and cause crashes.
Medium
General
Restore backward compatibility flag
To maintain backward compatibility and prevent breaking changes for API clients, re-introduce the UseMutex property and map it to the new UseLock property. This ensures existing clients continue to function correctly.
public class CodeInterpretOptions
{
public string? ScriptName { get; set; }
public IEnumerable<KeyValue>? Arguments { get; set; }
+ [JsonIgnore]
public bool UseLock { get; set; }
+ // Backward-compat alias for existing clients+ [JsonPropertyName("use_mutex")]+ public bool UseMutex+ {+ get => UseLock;+ set => UseLock = value;+ }+ [JsonPropertyName("use_lock")]+ public bool UseLockSerialized+ {+ get => UseLock;+ set => UseLock = value;+ }
public bool UseProcess { get; set; }
}
Suggestion importance[1-10]: 7
__
Why: The suggestion correctly identifies that renaming UseMutex to UseLock is a breaking change for API clients. Providing backward compatibility is a good practice to avoid runtime errors for consumers of the API.
Medium
Improve cancellation responsiveness
Improve cancellation responsiveness by adding a cancellationToken.ThrowIfCancellationRequested() check immediately before the blocking PythonEngine.Exec call. This ensures the operation is aborted if cancellation was requested while preparing for execution.
Why: The suggestion correctly points out that PythonEngine.Exec is a blocking call that doesn't respect the cancellation token, and proposes a valid pre-check. This improves cancellation responsiveness for long-running scripts.
Low
Learned best practice
Add early cancellation checks
Add an early cancellation check at the start of RunAsync to avoid queuing work when a cancellation request is already signaled.
Why:
Relevant best practice - Check cancellation state before starting expensive operations and promptly propagate OperationCanceledException to avoid doing unnecessary work.
Low
Clarify cancellation responsibility
Document that cancellation is controlled exclusively by the RunAsync parameter and remove any ambiguity by adding an XML doc comment guiding callers to pass the token there. This clarifies the single source of truth for cancellation.
+/// <summary>+/// Options for code interpretation. Cancellation is controlled via the CancellationToken+/// parameter on ICodeProcessor.RunAsync and should not be included here.+/// </summary>
public class CodeInterpretOptions
{
public string? ScriptName { get; set; }
public IEnumerable<KeyValue>? Arguments { get; set; }
public bool UseLock { get; set; }
public bool UseProcess { get; set; }
}
Suggestion importance[1-10]: 5
__
Why:
Relevant best practice - Prefer passing CancellationToken via method parameters rather than embedding it in option objects to avoid nullable token confusion and ensure consistent cancellation semantics.
-dynamic outIO = io.StringIO();-dynamic errIO = io.StringIO();-sys.stdout = outIO;-sys.stderr = errIO;-...
var stdout = outIO.getvalue()?.ToString() as string;
var stderr = errIO.getvalue()?.ToString() as string;
-...++cancellationToken.ThrowIfCancellationRequested();+
return new CodeInterpretResponse
{
- Result = stdout?.TrimEnd('\r', '\n') ?? string.Empty,- Success = true+ Result = (stdout ?? string.Empty).TrimEnd('\r', '\n'),+ ErrorMsg = string.IsNullOrWhiteSpace(stderr) ? null : stderr,+ Success = string.IsNullOrWhiteSpace(stderr)
};
Suggestion importance[1-10]: 8
__
Why: This is a valid and important suggestion. The current code in CoreRunScript always sets Success = true, which can hide errors printed to stderr. The suggestion correctly proposes to check stderr and set the Success flag accordingly, which is a critical fix for correct error handling.
Medium
General
Preserve lock and cancellation semantics
Simplify the call to _executor.ExecuteAsync by passing the async method directly instead of wrapping it in an async lambda.
Why: The suggestion correctly points out that using async () => await ... is an unnecessary allocation. Changing it to () => ... is a valid performance and style improvement, making the code cleaner and slightly more efficient.
Low
Learned best practice
Add null/empty input guard
Add a guard to ensure codeScript is not null or whitespace before substring operations, and default scriptName safely.
✅ Preserve and return error detailsSuggestion Impact:The commit separated stdout and stderr streams, captured stderr, and returned exception messages via ErrorMsg instead of returning an empty response. However, it did not set Success based on stderr presence as suggested.
code diff:
try
{
// Redirect standard output/error to capture it
- dynamic stringIO = io.StringIO();- sys.stdout = stringIO;- sys.stderr = stringIO;+ dynamic outIO = io.StringIO();+ dynamic errIO = io.StringIO();+ sys.stdout = outIO;+ sys.stderr = errIO;
// Set global items
using var globals = new PyDict();
@@ -185,20 +186,21 @@
PythonEngine.Exec(codeScript, globals);
// Get result
- var result = stringIO.getvalue()?.ToString() as string;+ var stdout = outIO.getvalue()?.ToString() as string;+ var stderr = errIO.getvalue()?.ToString() as string;
cancellationToken.ThrowIfCancellationRequested();
return new CodeInterpretResponse
{
- Result = result?.TrimEnd('\r', '\n') ?? string.Empty,+ Result = stdout?.TrimEnd('\r', '\n') ?? string.Empty,
Success = true
};
}
catch (Exception ex)
{
_logger.LogError(ex, $"Error in {nameof(CoreRunScript)} in {Provider}.");
- return new();+ return new() { ErrorMsg = ex.Message };
}
Improve error handling in CoreRunScript by capturing and returning specific error details from stderr or exceptions in the CodeInterpretResponse, instead of returning a generic empty response on failure.
private async Task<CodeInterpretResponse> CoreRunScript(string codeScript, CodeInterpretOptions? options = null, CancellationToken cancellationToken = default)
{
cancellationToken.ThrowIfCancellationRequested();
var execTask = Task.Factory.StartNew(() =>
{
using (Py.GIL())
{
- // Import necessary Python modules
dynamic sys = Py.Import("sys");
dynamic io = Py.Import("io");
try
{
- // Redirect standard output/error to capture it
dynamic stringIO = io.StringIO();
+ dynamic errIO = io.StringIO();
sys.stdout = stringIO;
- sys.stderr = stringIO;+ sys.stderr = errIO;- // Set global items
using var globals = new PyDict();
if (codeScript.Contains("__main__") == true)
{
globals.SetItem("__name__", new PyString("__main__"));
}
- // Set arguments
var list = new PyList();
if (options?.Arguments?.Any() == true)
{
list.Append(new PyString(options?.ScriptName ?? "script.py"));
-
foreach (var arg in options!.Arguments)
{
if (!string.IsNullOrWhiteSpace(arg.Key) && !string.IsNullOrWhiteSpace(arg.Value))
{
list.Append(new PyString($"--{arg.Key}"));
list.Append(new PyString($"{arg.Value}"));
}
}
}
sys.argv = list;
cancellationToken.ThrowIfCancellationRequested();
- // Execute Python script
PythonEngine.Exec(codeScript, globals);
- // Get result- var result = stringIO.getvalue()?.ToString() as string;+ var stdout = stringIO.getvalue()?.ToString() as string;+ var stderr = errIO.getvalue()?.ToString() as string;
cancellationToken.ThrowIfCancellationRequested();
return new CodeInterpretResponse
{
- Result = result?.TrimEnd('\r', '\n') ?? string.Empty,- Success = true+ Result = (stdout ?? string.Empty).TrimEnd('\r', '\n'),+ ErrorMsg = stderr,+ Success = string.IsNullOrEmpty(stderr)
};
}
catch (Exception ex)
{
_logger.LogError(ex, $"Error in {nameof(CoreRunScript)} in {Provider}.");
- return new();+ return new CodeInterpretResponse+ {+ Success = false,+ ErrorMsg = ex.Message+ };
}
finally
{
- // Restore the original stdout/stderr/argv
sys.stdout = sys.__stdout__;
sys.stderr = sys.__stderr__;
sys.argv = new PyList();
}
- };+ }
}, cancellationToken);
- try- {- return await execTask.WaitAsync(cancellationToken);- }- catch- {- throw;- }+ return await execTask.WaitAsync(cancellationToken);
}
[Suggestion processed]
Suggestion importance[1-10]: 8
__
Why: This is a valuable improvement to error handling, as the current code swallows exception details, making debugging difficult. The suggestion correctly proposes capturing and returning error information in the response.
Medium
✅ Use Task.Run for executionSuggestion Impact:The commit replaced Task.Factory.StartNew with Task.Run and removed the redundant try-catch around WaitAsync, matching the suggestion’s intent. It also refined stdout/stderr handling, aligning with the suggested cleanup.
code diff:
- var execTask = Task.Factory.StartNew(() =>+ var execTask = Task.Run(() =>
{
using (Py.GIL())
{
@@ -151,9 +151,10 @@
try
{
// Redirect standard output/error to capture it
- dynamic stringIO = io.StringIO();- sys.stdout = stringIO;- sys.stderr = stringIO;+ dynamic outIO = io.StringIO();+ dynamic errIO = io.StringIO();+ sys.stdout = outIO;+ sys.stderr = errIO;
// Set global items
using var globals = new PyDict();
@@ -185,20 +186,21 @@
PythonEngine.Exec(codeScript, globals);
// Get result
- var result = stringIO.getvalue()?.ToString() as string;+ var stdout = outIO.getvalue()?.ToString() as string;+ var stderr = errIO.getvalue()?.ToString() as string;
cancellationToken.ThrowIfCancellationRequested();
return new CodeInterpretResponse
{
- Result = result?.TrimEnd('\r', '\n') ?? string.Empty,+ Result = stdout?.TrimEnd('\r', '\n') ?? string.Empty,
Success = true
};
}
catch (Exception ex)
{
_logger.LogError(ex, $"Error in {nameof(CoreRunScript)} in {Provider}.");
- return new();+ return new() { ErrorMsg = ex.Message };
}
finally
{
@@ -210,14 +212,7 @@
};
}, cancellationToken);
- try- {- return await execTask.WaitAsync(cancellationToken);- }- catch- {- throw;- }+ return await execTask.WaitAsync(cancellationToken);
Replace Task.Factory.StartNew with Task.Run for better integration with the thread pool and cancellation, and remove the redundant try-catch block and an extraneous semicolon.
-var execTask = Task.Factory.StartNew(() =>+var execTask = Task.Run(() =>
{
using (Py.GIL())
{
- ...- };+ // existing body unchanged+ dynamic sys = Py.Import("sys");+ dynamic io = Py.Import("io");+ try+ {+ dynamic stringIO = io.StringIO();+ dynamic errIO = io.StringIO();+ sys.stdout = stringIO;+ sys.stderr = errIO;+ using var globals = new PyDict();+ if (codeScript.Contains("__main__") == true)+ {+ globals.SetItem("__name__", new PyString("__main__"));+ }+ var list = new PyList();+ if (options?.Arguments?.Any() == true)+ {+ list.Append(new PyString(options?.ScriptName ?? "script.py"));+ foreach (var arg in options!.Arguments)+ {+ if (!string.IsNullOrWhiteSpace(arg.Key) && !string.IsNullOrWhiteSpace(arg.Value))+ {+ list.Append(new PyString($"--{arg.Key}"));+ list.Append(new PyString($"{arg.Value}"));+ }+ }+ }+ sys.argv = list;++ cancellationToken.ThrowIfCancellationRequested();++ PythonEngine.Exec(codeScript, globals);++ var stdout = stringIO.getvalue()?.ToString() as string;+ var stderr = errIO.getvalue()?.ToString() as string;++ cancellationToken.ThrowIfCancellationRequested();++ return new CodeInterpretResponse+ {+ Result = (stdout ?? string.Empty).TrimEnd('\r', '\n'),+ ErrorMsg = stderr,+ Success = string.IsNullOrEmpty(stderr)+ };+ }+ finally+ {+ sys.stdout = sys.__stdout__;+ sys.stderr = sys.__stderr__;+ sys.argv = new PyList();+ }+ }
}, cancellationToken);
-try-{- return await execTask.WaitAsync(cancellationToken);-}-catch-{- throw;-}+return await execTask.WaitAsync(cancellationToken);
Suggestion importance[1-10]: 5
__
Why: The suggestion correctly recommends using the more modern and safer Task.Run over Task.Factory.StartNew, which is a good practice for code maintainability and clarity, although the functional impact here is minor.
Low
Learned best practice
Guard against empty code script
Add a null/empty guard for codeScript and return a safe failure result instead of risking a NullReferenceException.
To ensure long-running Python scripts can be cancelled, register a callback with the cancellationToken to call PythonEngine.Interrupt(). This fixes a bug where cancellation would not work for blocking script execution.
using (Py.GIL())
{
+ cancellationToken.ThrowIfCancellationRequested();+
// Import necessary Python modules
dynamic sys = Py.Import("sys");
dynamic io = Py.Import("io");
...
+ sys.argv = list;++ cancellationToken.ThrowIfCancellationRequested();++ using var cancelReg = cancellationToken.Register(() =>+ {+ try+ {+ // Signal Python to interrupt execution+ PythonEngine.Interrupt();+ }+ catch { }+ });+
// Execute Python script
PythonEngine.Exec(codeScript, globals);
// Get result
var result = stringIO.getvalue()?.ToString() as string;
cancellationToken.ThrowIfCancellationRequested();
return new CodeInterpretResponse
{
Result = result?.TrimEnd('\r', '\n') ?? string.Empty,
Success = true
};
}
Suggestion importance[1-10]: 9
__
Why: This suggestion correctly identifies a critical flaw in the PR's cancellation logic for in-process Python execution. The current implementation would not cancel long-running scripts, and the proposed use of PythonEngine.Interrupt() via cancellationToken.Register is the correct way to fix this, making the new cancellation feature effective.
High
Avoid fragile -c code passing
Improve the reliability of out-of-process Python execution by writing the script to a temporary file instead of passing it via the -c command-line argument. This avoids issues with special characters and potential argument injection.
-psi.ArgumentList.Add("-c");-psi.ArgumentList.Add(codeScript);+// Use a temp file to avoid quoting/argument parsing issues with -c+var tempFile = Path.GetTempFileName();+await File.WriteAllTextAsync(tempFile, codeScript, Encoding.UTF8, cancellationToken);+psi.ArgumentList.Add(tempFile);
Suggestion importance[1-10]: 8
__
Why: This suggestion addresses a significant robustness and potential security issue. Passing raw code via the -c argument is fragile and can break if the code contains special characters. The proposed solution of writing the script to a temporary file is a much more reliable and secure method for executing external processes.
Refactor the process cancellation logic in CoreRunProcess to prevent zombie subprocesses. Use Task.WhenAny to wait for either process exit or cancellation, ensure the process is killed upon cancellation, and then read the output streams to completion without a cancellation token to avoid data loss.
private async Task<CodeInterpretResponse> CoreRunProcess(string codeScript, CodeInterpretOptions? options = null, CancellationToken cancellationToken = default)
{
var psi = new ProcessStartInfo
{
FileName = "python",
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
CreateNoWindow = true,
StandardOutputEncoding = Encoding.UTF8,
StandardErrorEncoding = Encoding.UTF8
};
- // Add raw code script
psi.ArgumentList.Add("-c");
psi.ArgumentList.Add(codeScript);
- ...++ if (options?.Arguments?.Any() == true)+ {+ foreach (var arg in options.Arguments!)+ {+ if (!string.IsNullOrWhiteSpace(arg.Key) && !string.IsNullOrWhiteSpace(arg.Value))+ {+ psi.ArgumentList.Add($"--{arg.Key}");+ psi.ArgumentList.Add($"{arg.Value}");+ }+ }+ }+
using var proc = new Process { StartInfo = psi, EnableRaisingEvents = true };
if (!proc.Start())
{
throw new InvalidOperationException($"Failed to start Python process in {Provider}.");
}
try
{
- using var reg = cancellationToken.Register(() =>+ // Wait for exit or cancellation without canceling the IO reads.+ var waitTask = proc.WaitForExitAsync();+ var cancelTask = Task.Run(() => { cancellationToken.WaitHandle.WaitOne(); });+ var completed = await Task.WhenAny(waitTask, cancelTask);++ if (completed == cancelTask && !proc.HasExited)
{
- try- {- if (!proc.HasExited)- {- proc.Kill(entireProcessTree: true);- }- }- catch { }- });+ try { proc.Kill(entireProcessTree: true); } catch { }+ // Ensure process is terminated before reading output to completion.+ await waitTask;+ }- var stdoutTask = proc.StandardOutput.ReadToEndAsync(cancellationToken);- var stderrTask = proc.StandardError.ReadToEndAsync(cancellationToken);-- await Task.WhenAll([proc.WaitForExitAsync(cancellationToken), stdoutTask, stderrTask]);+ // Drain outputs without cancellation to avoid OperationCanceledException mid-stream.+ var stdoutTask = proc.StandardOutput.ReadToEndAsync();+ var stderrTask = proc.StandardError.ReadToEndAsync();+ await Task.WhenAll(stdoutTask, stderrTask);
cancellationToken.ThrowIfCancellationRequested();
return new CodeInterpretResponse
{
Success = proc.ExitCode == 0,
Result = stdoutTask.Result?.TrimEnd('\r', '\n') ?? string.Empty,
ErrorMsg = stderrTask.Result
};
}
finally
{
try
{
if (!proc.HasExited)
{
proc.Kill(entireProcessTree: true);
}
}
catch { }
}
}
Suggestion importance[1-10]: 8
__
Why: The suggestion correctly identifies a potential race condition where a canceled task could leave a zombie subprocess running. The proposed solution provides a more robust cancellation handling mechanism, ensuring the process is reliably terminated and its output is fully captured, which is a critical improvement for resource management.
Medium
✅ Fix documentation typoSuggestion Impact:The commit updated the XML comment, changing "scirpt" to "script" for the codeScript parameter.
code diff:
- /// <param name="codeScript">The code scirpt to run</param>+ /// <param name="codeScript">The code script to run</param>
Correct the typo "scirpt" to "script" in the XML documentation for the codeScript parameter in the RunAsync method.
-_logger.LogWarning($"Begin {nameof(CoreRunScript)} in {Provider}: ${options?.ScriptName}");+_logger.LogWarning($"Begin {nameof(CoreRunScript)} in {Provider}: {options?.ScriptName}");
Suggestion importance[1-10]: 5
__
Why: The suggestion correctly points out a typo ($ {options...}) in an interpolated log string, which would cause incorrect log output. Fixing this improves diagnostics and is a good catch, but it's a minor bug with moderate impact.
Low
Learned best practice
✅ Simplify non-nullable handlingSuggestion Impact:The commit changed the return expression to avoid direct null-coalescing on Result and instead used an extension method IfNullOrEmptyAs to provide the fallback to ErrorMsg or success text, aligning with the suggestion's intent to simplify non-null/empty handling.
code diff:
public override string ToString()
{
- return Result ?? ErrorMsg ?? $"Success: {Success}";+ return Result.IfNullOrEmptyAs(ErrorMsg ?? $"Success: {Success}")!;
}
Since 'Result' is non-nullable, remove the redundant null-coalescing and use a clear fallback to 'ErrorMsg' or success text.
Clamp the TimeoutSeconds value to a safe range (e.g., 1-300 seconds) before creating the CancellationTokenSource to prevent excessively long or invalid timeouts.
Why: The suggestion correctly identifies a potential issue where an excessively large TimeoutSeconds value could lead to long-running executions, and proposes a robust solution by clamping the value to a safe range.
Medium
✅ Use non-nullable cancellation tokenSuggestion Impact:The method signature was updated to use a non-nullable CancellationToken with a default value, matching the suggestion.
In the ICodeProcessor interface, change the RunAsync method's cancellationToken parameter from a nullable CancellationToken? to a non-nullable CancellationToken with a default value.
Why: The suggestion correctly identifies that using a non-nullable CancellationToken with a default value is a standard C# pattern, which simplifies implementations by removing the need for null checks.
Low
✅ Normalize cancellation token onceSuggestion Impact:The commit changed method signatures to use a non-nullable CancellationToken (with default) and removed null-coalescing inside methods, passing the normalized token through the call chain.
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
PR Type
Bug fix, Enhancement
Description
Refactored cancellation token handling with separate operation and lock tokens
Added configurable timeout seconds for code execution (defaults to 3 seconds)
Renamed
UseMutextoUseLockandCancellationTokentoOperationTokenfor clarityRemoved redundant token cancellation check in Python GIL context
Diagram Walkthrough
File Walkthrough
CodeInterpretOptions.cs
Separate operation and lock token handlingsrc/Infrastructure/BotSharp.Abstraction/Coding/Options/CodeInterpretOptions.cs
UseMutexproperty toUseLockfor better semantic clarityCancellationTokenproperty toOperationTokenforoperation-specific cancellation
LockTokenproperty for mutex/lock-specific cancellationhandling
CodeInstructOptions.cs
Add configurable timeout seconds propertysrc/Infrastructure/BotSharp.Abstraction/Instructs/Options/CodeInstructOptions.cs
TimeoutSecondsproperty with JSON serialization attributesInstructService.Execute.cs
Implement configurable code execution timeoutsrc/Infrastructure/BotSharp.Core/Instructs/Services/InstructService.Execute.cs
CodeInstructOptions.TimeoutSecondsCancellationTokentoOperationTokenPyCodeInterpreter.cs
Update token handling and remove redundant checkssrc/Plugins/BotSharp.Plugin.PythonInterpreter/Services/PyCodeInterpreter.cs
UseMutex→UseLock,CancellationToken→OperationTokenLockTokeninstead of operation tokenThrowIfCancellationRequested()call inside GILcontext
CoreRunScriptandCoreRunProcessmethods