如何在一个基于self-host的WebAPI项目中,记录将所有外部请求和回复信息记录在外部文件中,请用C#给详细代码
时间: 2023-12-14 10:36:04 浏览: 28
您可以使用ASP.NET Core框架中的中间件来记录请求和响应信息。下面是一个示例代码:
```csharp
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using System.IO;
using System.Text;
using System.Threading.Tasks;
public class LoggingMiddleware
{
private readonly RequestDelegate _next;
private readonly string _logPath;
public LoggingMiddleware(RequestDelegate next, string logPath)
{
_next = next;
_logPath = logPath;
}
public async Task Invoke(HttpContext context)
{
// 记录请求信息
var request = await FormatRequest(context.Request);
// 使用 StreamWriter 将请求信息写入日志文件
using (var writer = new StreamWriter(_logPath, true))
{
await writer.WriteLineAsync(request);
}
// 将请求流恢复到起始位置,以便其他中间件也可以读取它
context.Request.Body.Seek(0, SeekOrigin.Begin);
// 调用下一个中间件
await _next(context);
// 记录响应信息
var response = await FormatResponse(context.Response);
// 使用 StreamWriter 将响应信息写入日志文件
using (var writer = new StreamWriter(_logPath, true))
{
await writer.WriteLineAsync(response);
}
}
private async Task<string> FormatRequest(HttpRequest request)
{
var body = request.Body;
var buffer = new byte[Convert.ToInt32(request.ContentLength)];
await request.Body.ReadAsync(buffer, 0, buffer.Length);
var requestBody = Encoding.UTF8.GetString(buffer);
return $"{request.Method} {request.Scheme}://{request.Host}{request.Path} {requestBody}";
}
private async Task<string> FormatResponse(HttpResponse response)
{
response.Body.Seek(0, SeekOrigin.Begin);
var text = await new StreamReader(response.Body).ReadToEndAsync();
response.Body.Seek(0, SeekOrigin.Begin);
return $"StatusCode:{response.StatusCode}, Body:{text}";
}
}
public static class LoggingMiddlewareExtensions
{
public static IApplicationBuilder UseLoggingMiddleware(this IApplicationBuilder builder, string logPath)
{
return builder.UseMiddleware<LoggingMiddleware>(logPath);
}
}
```
在 `Startup.cs` 文件中,您可以使用 `UseLoggingMiddleware` 方法来启用中间件并指定日志文件的路径,例如:
```csharp
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
// ...
app.UseLoggingMiddleware("log.txt");
// ...
}
```
这样就可以将所有外部请求和响应信息记录在 `log.txt` 文件中了。请注意,在生产环境中,您可能需要使用更高级的日志库来记录和管理日志信息。