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How this project works:
Infinity-DBL edited this page Aug 6, 2024
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The InvertFile
class provides a method to process a file by inverting its bytes, but only if the file name matches a predefined expected name. It uses .NET's System.Diagnostics
for logging and System.IO
for file operations.
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Namespace and Using Directives
using System; using System.IO; using System.Diagnostics;
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System
: Basic types and functions. -
System.IO
: File operations. -
System.Diagnostics
: Logging and tracing.
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Class Declaration
namespace InvertFile { public class InvertFile
- The class
InvertFile
is encapsulated in theInvertFile
namespace.
- The class
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Constant for Expected File Name
private static readonly string ExpectedFileName = "89bb4eb5637df3cd96c463a795005065 " + "98c4f00b8ed6655bce4b6f80cd0e1164" + "1e9cfb7afa8f0df06590c0954af9025" + "a565be8b11d263294cd2a71676db860" + "ad460dc54bb5769d65f436afc02ed8ae";
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ExpectedFileName
is a string constant containing the expected file name. This is a specific, lengthy string that the file's name must match for the processing to occur.
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Method to Process File
public static void ProcessFile(string filePath)
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ProcessFile
is a static method that takes afilePath
as a parameter.
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Setting Up Trace Source
TraceSource traceSource = new TraceSource("FileProcessorTraceSource"); traceSource.Listeners.Add(new ConsoleTraceListener()); traceSource.Switch = new SourceSwitch("sourceSwitch", "Verbose");
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TraceSource
is created to handle logging. -
ConsoleTraceListener
sends trace output to the console. -
SourceSwitch
sets the logging level to "Verbose", meaning it will log detailed information.
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Extracting File Name and Validating
string fileName = Path.GetFileName(filePath); if (fileName != ExpectedFileName) { traceSource.TraceEvent(TraceEventType.Error, 0, $"Unexpected file name: {fileName}"); return; }
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Path.GetFileName(filePath)
extracts the file name from the given path. - It checks if this file name matches the
ExpectedFileName
. If not, it logs an error and exits the method.
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Processing the File
traceSource.TraceEvent(TraceEventType.Information, 0, $"Processing file: {fileName}"); try { byte[] fileBytes = File.ReadAllBytes(filePath); for (int i = 0; i < fileBytes.Length; i++) { fileBytes[i] = (byte)(~fileBytes[i] + 256); } File.WriteAllBytes(filePath, fileBytes); traceSource.TraceEvent(TraceEventType.Information, 0, "File processed successfully."); } catch (Exception ex) { traceSource.TraceEvent(TraceEventType.Error, 0, $"An error occurred: {ex.Message}"); }
- Logs the start of processing.
- Reads the file into a byte array.
- Inverts each byte in the array. The operation
~fileBytes[i] + 256
flips all bits of the byte and then adds 256 (which essentially just converts the byte to its bitwise complement). - Writes the modified bytes back to the file.
- Logs success or any errors encountered during processing.
- Purpose: Inverts the bytes of a file if the file name matches a specific expected name.
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Error Handling: Uses
TraceSource
to log errors and informational messages. - File Operations: Reads bytes, processes them, and writes them back to the file.
This approach ensures that only files with the correct name are processed and provides detailed logs of the operation.