Serilog：如何在appsettings.json中进一步增强过滤器表达式？

时间：2019-01-18 11:41:10

标签： c# .net-core serilog

我有两个使用Serilog的记录器，它们保存到不同的文件中。我想通过appsettings.json而不是代码来创建记录器。

当我通过Startup.cs配置创建记录器时，我得到了更具体的日志，我更喜欢用这种方式，因为它更清晰，并且可以让其他人查看日志并了解发生了什么而无需需要很多技术知识。但是，我想将此应用到appsettings，以便可以将代码迁移到我可以使用的任何其他项目。 仅供参考：我不想覆盖日志级别。

例如，使用代码，我像这样创建记录器：

Log.Logger = new LoggerConfiguration()
    .WriteTo.ColoredConsole()
    .WriteTo.Logger(lc => lc
    .Filter.ByExcluding(Matching.FromSource("Microsoft"))
    .WriteTo.File("Serilogs/Program_log_.txt", rollingInterval: RollingInterval.Day)
    .MinimumLevel.Information()
    .MinimumLevel.Override("Microsoft", LogEventLevel.Information))

    .WriteTo.Logger(lc => lc
    .Filter.ByIncludingOnly(Matching.FromSource("Microsoft"))
    .WriteTo.File("Serilogs/ServerTrace_log_.txt", rollingInterval: RollingInterval.Day)
    .MinimumLevel.Information()
    .MinimumLevel.Override("Microsoft", LogEventLevel.Information))

    .CreateLogger();

这会生成两个单独的输出，我喜欢以下格式： File 1：可读的自定义日志：

2019-01-18 11:18:09.873 +00:00 [INF] //Some custom log information
2019-01-18 11:18:09.875 +00:00 [INF] //Some more custom log information

File 2：堆栈跟踪，服务器信息：

2019-01-18 11:17:56.378 +00:00 [INF] User profile is available. Using '//A path' as key repository and Windows DPAPI to encrypt keys at rest.
2019-01-18 11:17:57.840 +00:00 [INF] Request starting HTTP/1.1 GET https://localhost:5001/swagger/index.html  
2019-01-18 11:17:58.074 +00:00 [INF] Request finished in 235.5796ms 200 text/html
2019-01-18 11:17:58.326 +00:00 [INF] Request starting HTTP/1.1 GET https://localhost:5001/swagger/v1/swagger.json  
2019-01-18 11:17:58.452 +00:00 [INF] Request finished in 126.2127ms 200 application/json;charset=utf-8

当我使用JSON appsettings进行操作时，它看起来像这样：

 "Serilog": {
    "Using": [
      "Serilog.Sinks.File",
      "Serilog.Filters.Expressions",
      "Serilog.Settings.Configuration"
    ],
    "WriteTo": [
      {
        "Name": "Logger",
        "Args": {
          "configureLogger": {
            "Filter": [
              {
                "Name": "ByIncluding",
                "Args": {
                  "expression": "SourceContext = 'Microsoft'"
                }
              }
            ],
            "WriteTo": [
              {
                "Name": "File",
                "Args": {
                  "path": "./Serilogs/server_logs_.log",
                  "rollingInterval": "Day"
                }
              }
            ]
          }
        }
      },
      {
        "Name": "Logger",
        "Args": {
          "configureLogger": {
            "Filter": [
              {
                "Name": "ByExcluding",
                "Args": {
                  "expression": "SourceContext = 'Microsoft.AspNetCore.Hosting.Internal.WebHost'"
                }
              }
            ],
            "WriteTo": [
              {
                "Name": "File",
                "Args": {
                  "path": "./Serilogs/program_logs_.log",
                  "rollingInterval": "Day"
                }
              }
            ]
          }
        }
      }
    ]
  }

这将生成两个文件。 File 1：可读的自定义日志：

2019-01-18 11:22:52.903 +00:00 [INF] User profile is available. Using '// A path' as key repository and Windows DPAPI to encrypt keys at rest.
2019-01-18 11:22:59.229 +00:00 [INF] Route matched with {action = "PollForStatusUpdate", controller = "StatusMessage"}. Executing action {apiname}.{controller}.{method}.PollForStatusUpdate ({apiname})
2019-01-18 11:22:59.505 +00:00 [INF] Executing action method {apiname}.{controller}.{method}.PollForStatusUpdate ({apiname}) with arguments (["{apiname}.{controller}.{method}.MessageResult"]) - Validation state: "Valid"
2019-01-18 11:22:59.632 +00:00 [INF] //Some custom log information
2019-01-18 11:22:59.639 +00:00 [INF] //Some more custom log information
{apiname}.{controller}.{method}.PollForStatusUpdate ({apiname}), returned result Microsoft.AspNetCore.Mvc.OkObjectResult in 516.8129ms.
2019-01-18 11:23:00.040 +00:00 [INF] Executing ObjectResult, writing value of type '{apiname}.{controller}.{method}.MessageResult'.
2019-01-18 11:23:00.048 +00:00 [INF] Executed action {apiname}.{controller}.{method}.PollForStatusUpdate ({apiname}) in 813.08940000000007ms

File 2：堆栈跟踪，服务器信息：

2019-01-18 11:22:52.903 +00:00 [INF] User profile is available. Using 'C:\Users\msharp\AppData\Local\ASP.NET\DataProtection-Keys' as key repository and Windows DPAPI to encrypt keys at rest.
2019-01-18 11:22:54.263 +00:00 [INF] Request starting HTTP/1.1 GET https://localhost:5001/swagger/index.html  
2019-01-18 11:22:54.473 +00:00 [INF] Request finished in 211.831ms 200 text/html
2019-01-18 11:22:54.737 +00:00 [INF] Request starting HTTP/1.1 GET https://localhost:5001/swagger/v1/swagger.json  
2019-01-18 11:22:54.838 +00:00 [INF] Request finished in 100.8892ms 200 application/json;charset=utf-8
2019-01-18 11:22:59.205 +00:00 [INF] Request starting HTTP/1.1 POST https://localhost:5001/api/StatusMessage/PollForStatusUpdate application/json-patch+json 180
2019-01-18 11:22:59.229 +00:00 [INF] Route matched with {action = "PollForStatusUpdate", controller = "StatusMessage"}. Executing action PureValuationsApi.Controllers.StatusMessageController.PollForStatusUpdate (PureValuationsApi)
2019-01-18 11:22:59.505 +00:00 [INF] Executing action method {apiname}.{controller}.{method}.PollForStatusUpdate ({apiname}) with arguments (["{apiname}.{controller}.{method}.MessageResult"]) - Validation state: "Valid"
2019-01-18 11:22:59.632 +00:00 [INF] //Some custom lof information
2019-01-18 11:22:59.639 +00:00 [INF] //Some more custom log information
{apiname}.{controller}.{method}.PollForStatusUpdate ({apiname}), returned result Microsoft.AspNetCore.Mvc.OkObjectResult in 516.8129ms.
2019-01-18 11:23:00.040 +00:00 [INF] Executing ObjectResult, writing value of type '{apiname}.{controller}.{method}.MessageResult'.
2019-01-18 11:23:00.048 +00:00 [INF] Executed action {apiname}.{controller}.{method}.PollForStatusUpdate ({apiname}) in 813.08940000000007ms
2019-01-18 11:23:00.052 +00:00 [INF] Request finished in 847.5964ms 200 application/json; charset=utf-8

因此，通过应用相同的技术，结果的结果会有所不同，因为File 1现在包含更多的动作信息，而File 2包含堆栈 plus 自定义记录信息，尽管我希望它们完全分开。

1 个答案:

答案 0 :(得分：1)

我认为您的过滤器不太正确。

过滤器表达式应为：

"expression": "SourceContext = 'Microsoft' or StartsWith(SourceContext, 'Microsoft.')"

（我想您可以在没有最后一个点的情况下执行StartsWith(SourceContext, 'Microsoft')，但是对于诸如MicrosoftOrIsItReally.MyNamespace这样的名称空间，它可能无法正常工作）

（内部Matching.ForSource进行SourceContext.StartsWith(..)类过滤，如in the source所示）

要确认这一点，您可能需要编辑文件接收器的outputTemplate以显示SourceContext属性并查看日志事件的来源。 （默认值为"{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} [{Level:u3}] {Message:lj}{NewLine}{Exception}"）。您可以将其更改为"{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} [{Level:u3}]<{SourceContext}> {Message:lj}{NewLine}{Exception}"以包含SourceContext属性。

顺便说一句，您有一个多余的"Using"指令。 "Serilog.Settings.Configuration"不是必需的

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