c# - RestSharp 打印原始请求和响应 header

我正在使用 RestSharp 来调用网络服务。一切都很好，但我想知道是否可以打印发出的原始请求 header 和正文以及返回的原始响应 header 和响应正文。

这是我创建请求并获得响应的代码

public static TResponse ExecutePostCall<TResponse, TRequest>(String url, TRequest requestData, string token= "") where TResponse : new()
{
    RestRequest request = new RestRequest(url, Method.POST);
    if (!string.IsNullOrWhiteSpace(token))
    {
        request.AddHeader("TOKEN", token);
    }


    request.RequestFormat = DataFormat.Json;
    request.AddBody(requestData);

    // print raw request here

    var response = _restClient.Execute<TResponse>(request);

    // print raw response here

    return response.Data;
}

那么，是否可以打印原始请求和响应？

最佳答案

RestSharp 没有提供一种机制来实现您想要的功能，并且激活 .Net 跟踪对 IMO 来说有点矫枉过正。

对于日志记录(调试)目的(例如，我可以在 PROD 中保持开启一段时间)我发现这种方法非常有用(尽管它有一些关于如何调用它的详细信息，请阅读下面的代码):

private void LogRequest(IRestRequest request, IRestResponse response, long durationMs)
{
        var requestToLog = new
        {
            resource = request.Resource,
            // Parameters are custom anonymous objects in order to have the parameter type as a nice string
            // otherwise it will just show the enum value
            parameters = request.Parameters.Select(parameter => new
            {
                name = parameter.Name,
                value = parameter.Value,
                type = parameter.Type.ToString()
            }),
            // ToString() here to have the method as a nice string otherwise it will just show the enum value
            method = request.Method.ToString(),
            // This will generate the actual Uri used in the request
            uri = _restClient.BuildUri(request),
        };

        var responseToLog = new
        {
            statusCode = response.StatusCode,
            content = response.Content,
            headers = response.Headers,
            // The Uri that actually responded (could be different from the requestUri if a redirection occurred)
            responseUri = response.ResponseUri,
            errorMessage = response.ErrorMessage,
        };

        Trace.Write(string.Format("Request completed in {0} ms, Request: {1}, Response: {2}",
                durationMs,
                JsonConvert.SerializeObject(requestToLog),
                JsonConvert.SerializeObject(responseToLog)));
}

注意事项:

Headers、Url段、QueryString参数、body等都是RestSharp的参数，都出现在请求的参数集合中，有对应的类型。

必须在请求发生后调用日志方法。由于 RestSharp 的工作方式，Execute 方法将添加 header ，运行身份验证器(如果已配置)等，因此需要这样做，所有这些都会修改请求。因此，为了记录所有发送的真实参数，应该在记录请求之前调用 Execute 方法。

RestSharp 本身永远不会抛出(而是将错误保存在 response.ErrorException 属性中)，但我认为反序列化可能会抛出(不确定)，此外我需要记录原始响应，所以我选择实现我自己的反序列化。

请记住，RestSharp 在转换参数值以生成 Uri 时使用其自己的格式，因此序列化参数以记录它们可能不会显示与放入 Uri 中的完全相同的内容。这就是为什么 IRestClient.BuildUri 方法很酷的原因是获取实际调用的 Uri(包括基本 url、替换的 url 段、添加的 queryString 参数等)。

编辑: 还要记住，可能会发生序列化器 RestSharp 用于 body 的情况与此代码使用的不同，所以我猜代码可以调整为使用 body t 试过这个)。

需要一些自定义代码才能在日志中对枚举值进行很好的描述。

request.JsonSerializer.Serialize() 用法可以移动以在测量中包括反序列化。

这是一个基本的完整基类示例，带有日志记录(使用 NLog):

using System;
using System.Diagnostics;
using System.Linq;
using NLog;
using Newtonsoft.Json;
using RestSharp;

namespace Apis
{
    public abstract class RestApiBase
    {
        protected readonly IRestClient _restClient;
        protected readonly ILogger _logger;

        protected RestApiBase(IRestClient restClient, ILogger logger)
        {
            _restClient = restClient;
            _logger = logger;
        }

        protected virtual IRestResponse Execute(IRestRequest request)
        {
            IRestResponse response = null;
            var stopWatch = new Stopwatch();

            try
            {
                stopWatch.Start();
                response = _restClient.Execute(request);
                stopWatch.Stop();

                // CUSTOM CODE: Do more stuff here if you need to...

                return response;
            }
            catch (Exception e)
            {
                // Handle exceptions in your CUSTOM CODE (restSharp will never throw itself)
            }
            finally
            {
                LogRequest(request, response, stopWatch.ElapsedMilliseconds);
            }

            return null;
        }

        protected virtual T Execute<T>(IRestRequest request) where T : new()
        {
            IRestResponse response = null;
            var stopWatch = new Stopwatch();

            try
            {
                stopWatch.Start();
                response = _restClient.Execute(request);
                stopWatch.Stop();

                // CUSTOM CODE: Do more stuff here if you need to...

                // We can't use RestSharp deserialization because it could throw, and we need a clean response
                // We need to implement our own deserialization.
                var returnType = JsonConvert.DeserializeObject<T>(response.Content);
                return returnType;
            }
            catch (Exception e)
            {
                // Handle exceptions in your CUSTOM CODE (restSharp will never throw itself)
                // Handle exceptions in deserialization
            }
            finally
            {
                LogRequest(request, response, stopWatch.ElapsedMilliseconds);
            }

            return default(T);
        }

        private void LogRequest(IRestRequest request, IRestResponse response, long durationMs)
        {
            _logger.Trace(() =>
            {
                var requestToLog = new
                {
                    resource = request.Resource,
                    // Parameters are custom anonymous objects in order to have the parameter type as a nice string
                    // otherwise it will just show the enum value
                    parameters = request.Parameters.Select(parameter => new
                    {
                        name = parameter.Name,
                        value = parameter.Value,
                        type = parameter.Type.ToString()
                    }),
                    // ToString() here to have the method as a nice string otherwise it will just show the enum value
                    method = request.Method.ToString(),
                    // This will generate the actual Uri used in the request
                    uri = _restClient.BuildUri(request),
                };

                var responseToLog = new
                {
                    statusCode = response.StatusCode,
                    content = response.Content,
                    headers = response.Headers,
                    // The Uri that actually responded (could be different from the requestUri if a redirection occurred)
                    responseUri = response.ResponseUri,
                    errorMessage = response.ErrorMessage,
                };

                return string.Format("Request completed in {0} ms, Request: {1}, Response: {2}",
                    durationMs, JsonConvert.SerializeObject(requestToLog),
                    JsonConvert.SerializeObject(responseToLog));
            });
        }
    }
}

这个类将记录如下内容(格式非常适合粘贴在这里):

Request completed in 372 ms, Request : {
    "resource" : "/Event/Create/{hostId}/{startTime}",
    "parameters" : [{
            "name" : "hostId",
            "value" : "116644",
            "type" : "UrlSegment"
        }, {
            "name" : "startTime",
            "value" : "2016-05-18T19:48:58.9744911Z",
            "type" : "UrlSegment"
        }, {
            "name" : "application/json",
            "value" : "{\"durationMinutes\":720,\"seats\":100,\"title\":\"Hello StackOverflow!\"}",
            "type" : "RequestBody"
        }, {
            "name" : "api_key",
            "value" : "123456",
            "type" : "QueryString"
        }, {
            "name" : "Accept",
            "value" : "application/json, application/xml, text/json, text/x-json, text/javascript, text/xml",
            "type" : "HttpHeader"
        }
    ],
    "method" : "POST",
    "uri" : "http://127.0.0.1:8000/Event/Create/116644/2016-05-18T19%3A48%3A58.9744911Z?api_key=123456"
}, Response : {
    "statusCode" : 200,
    "content" : "{\"eventId\":2000045,\"hostId\":116644,\"scheduledLength\":720,\"seatsReserved\":100,\"startTime\":\"2016-05-18T19:48:58.973Z\"",
    "headers" : [{
            "Name" : "Access-Control-Allow-Origin",
            "Value" : "*",
            "Type" : 3
        }, {
            "Name" : "Access-Control-Allow-Methods",
            "Value" : "POST, GET, OPTIONS, PUT, DELETE, HEAD",
            "Type" : 3
        }, {
            "Name" : "Access-Control-Allow-Headers",
            "Value" : "X-PINGOTHER, Origin, X-Requested-With, Content-Type, Accept",
            "Type" : 3
        }, {
            "Name" : "Access-Control-Max-Age",
            "Value" : "1728000",
            "Type" : 3
        }, {
            "Name" : "Content-Length",
            "Value" : "1001",
            "Type" : 3
        }, {
            "Name" : "Content-Type",
            "Value" : "application/json",
            "Type" : 3
        }, {
            "Name" : "Date",
            "Value" : "Wed, 18 May 2016 17:44:16 GMT",
            "Type" : 3
        }
    ],
    "responseUri" : "http://127.0.0.1:8000/Event/Create/116644/2016-05-18T19%3A48%3A58.9744911Z?api_key=123456",
    "errorMessage" : null
}

希望你觉得这个有用!

关于c# - RestSharp 打印原始请求和响应 header ，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/15683858/