.net core 學習小結之 PostMan報415

• 首先415的官方解釋是：對於當前請求的方法和所請求的資源，請求中提交的實體並不是服務器中所支持的格式，因此請求被拒絕。
• 也就是說我所准備的數據格式並不是后台代碼使用的數據格式
• 后台代碼如下

  using System;
  using System.Collections.Generic;
  using System.ComponentModel.DataAnnotations;
  using System.Linq;
  using System.Threading.Tasks;
  using Microsoft.AspNetCore.Mvc;
  
  namespace JwtAuth.Controllers
  {
      using System.Security.Claims;
      using Microsoft.Extensions.Options;
      using Microsoft.IdentityModel.Tokens;
      using Microsoft.AspNetCore.Authentication.JwtBearer;
      //添加dll的引用 Nuget Microsoft.AspNetCore.Authentication.JwtBearer;
      using System.IdentityModel.Tokens.Jwt;
       [Route("api/[controller]")]
      public class AuthController : Controller
      {
          public JwtSettings settings;
          public AuthController(IOptions<JwtSettings> jwtsettings)
          {
              settings = jwtsettings.Value;
          }
          [HttpPost]
          public IActionResult Token([FromBody]LoginInfo model)
          {
              if (ModelState.IsValid)
              {
                  if (model.username == "cyao" && model.password == "123456")
                  {
                      //用戶合法情況
                      //添加授權信息
                      var claims = new Claim[] { new Claim(ClaimTypes.Name, "cyao"), new Claim(ClaimTypes.Role, "admin") };
                      var key = new SymmetricSecurityKey(System.Text.Encoding.UTF8.GetBytes(settings.SecretKey));
                      var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);
                      var token = new JwtSecurityToken(
                          settings.Issuer,
                          settings.Audience,
                          claims,
                          DateTime.Now,
                          DateTime.Now.AddMinutes(30),//過期時間
                          creds);
                      return Ok(new { token = new JwtSecurityTokenHandler().WriteToken(token) });
                  }
              }
              return BadRequest();
          }
      }
      public class LoginInfo
      {
          [Required]
          public string username { get; set; }
          [Required]
          public string password { get; set; }
      }
  }

• 使用POSTMan如何構造一個
  [FromBody]？錯誤示例 （圖1.0）
• 正確示例如下圖2.0（圖2.0）
• 或者使用圖1.0的配置將后台代碼參數的標簽改成[FromForm]