使用依赖注入的 Rest Api [关闭]答案

【问题标题】：RestApi with dependecy injection [closed]使用依赖注入的 Rest Api [关闭]
【发布时间】：2021-01-11 00:55:42
【问题描述】：

我在本地机器上有两个应用程序，第一个是客户端应用程序并消耗 restapi 响应，第二个是 ASP.net WebApi 应用程序。 RestApi 不包含任何 DI 类。客户端应用程序有 DI 类并消耗 restapi 响应并得到错误，但如果我将删除 DI 概念，那么它工作正常。

从 http://localhost:7820/ 使用 WebApi

public class Employee : IEmployee
{
string Baseurl = "http://localhost:7820/";

public async Task<IEnumerable<employee>> GetAll(string accessToken)
{
    List<employee> employee_ = new List<employee>();
    try
    {
        using (var client = new HttpClient())
        {
            //Passing service base url  
            client.BaseAddress = new Uri(Baseurl);

            client.DefaultRequestHeaders.Clear();
            //Define request data format  
            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("access_token", "Bearer " + accessToken);

            //Sending request to find web api REST service resource GetAllEmployees using HttpClient  
            HttpResponseMessage Res = await client.GetAsync("api/Employee/Get");

            //Checking the response is successful or not which is sent using HttpClient  
            if (Res.IsSuccessStatusCode)
            {
                //Storing the response details recieved from web api   
                var EmpResponse = Res.Content.ReadAsStringAsync().Result;

                //Deserializing the response recieved from web api and storing into the Employee list  
                employee_ = JsonConvert.DeserializeObject<List<employee>>(EmpResponse);

            }
            //returning the employee list to view  
            return employee_;
        }
    }
    catch (Exception er)
    {

        return employee_;
    }
}

Web API 服务：

public IHttpActionResult Get()
{
    try
    {
        using (employeesmgmtEntities entities = new employeesmgmtEntities())
        {
            List<employee> list = (
            from a in new employeesmgmtEntities().employees
            select new
            {
              emplId = a.emplId,
              empName = a.empName,
              age = a.age,
              fullAddress = a.fullAddress,
              city = a.city,
              pinCode = a.pinCode,
              mobileNo = a.mobileNo,
              emailId = a.emailId,
              bankName=a.bankName,
              accountNo = a.accountNo,
              ifscCode = a.ifscCode,
              salary = a.salary
            }).AsEnumerable().Select(o => new employee
            {
              emplId = o.emplId,
              empName = o.empName,
              age = o.age,
              fullAddress = o.fullAddress,
              city = o.city,
              pinCode = o.pinCode,
              mobileNo = o.mobileNo,
              emailId = o.emailId,
              bankName = o.bankName,
              accountNo = o.accountNo,
              ifscCode = o.ifscCode,
              salary = o.salary
            }).ToList();
            
            if (list != null)
            { return Ok(list); }
            else
            { return NotFound(); }
        }
    }
    catch (Exception ex)
    { return BadRequest(ex.ToString()); }
}

HttpResponseMessage 出现错误

{StatusCode: 401, ReasonPhrase: 'Unauthorized', Version: 1.1, 
    Content: System.Net.Http.StreamContent, Headers:
{
  Pragma: no-cache
  X-SourceFiles: =?UTF-8?B?UzpcU09GVFdBUkVTLVBST0ZFU1NJT05BTFxFU1NFTkNFXFNJVEVTX1VOREVSLUNPTlNUUlVDVElPTlxTQVVSQUJIXGVtcGxveWVlc01nbXRBcGlcZW1wbG95ZWVzTWdtdEFwaVxhcGlcRW1wbG95ZWVcR2V0?=
  Cache-Control: no-cache
  Date: Sun, 10 Jan 2021 13:29:06 GMT
  Server: Microsoft-IIS/10.0
  WWW-Authenticate: Bearer
  X-AspNet-Version: 4.0.30319
  X-Powered-By: ASP.NET
  Content-Length: 71
  Content-Type: application/json; charset=utf-8
  Expires: -1
}}

【问题讨论】：

您的问题中返回的错误信息描述性不够，任何人都无法帮助您。请确保您获得实际的异常信息。这可以通过更改 IDE 中的异常设置或更改在开发环境中输出错误的方式来完成。一旦找到，请发布它们，包括 full 堆栈跟踪。就目前而言，您的问题需要更加明确，另一方面包含too much unnecessary information，因此可能会被关闭。
感谢 Steven 的帮助，我终于解决了编码错误的问题。我会在评论中提到。

标签： asp.net-web-api dependency-injection rest

【解决方案1】：

我错在 2 行代码耗时 restapi 是

 client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("access_token", "Bearer " + accessToken);

            //Sending request to find web api REST service resource GetAllEmployees using HttpClient  
            HttpResponseMessage Res = await client.GetAsync("api/Employee/Get");

解决方法是去掉Get 并将“access_token”关键字替换为“Bearer”

 client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer",accessToken);

            //Sending request to find web api REST service resource GetAllEmployees using HttpClient  
            HttpResponseMessage Res = await client.GetAsync("api/Employee");

【讨论】：