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@jipengxiang
Created November 15, 2018 03:49
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using ProductStore.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
using System.Web.Http.Cors;
namespace WebAPIRestful.Controllers
{
public class ProductV2Controller : ApiController
{
static readonly IProductRepository repository = new ProductRepository();
//Version 2
[HttpGet]
[Route("api/v2/products")]
public IEnumerable<Product> GetAllProductsFromRepository()
{
return repository.GetAll();
}
//Route constraints let you restrict how the parameters in the route template are matched.
//The general syntax is "{parameter:constraint}".
//Constraints on URL parameters
//We can even restrict the template placeholder to the type of parameter it can have.
//For example, we can restrict that the request will be only served if the id is greater than 2.
//Otherwise the request will not work. For this, we will apply multiple constraints in the same request:
//Type of the parameter id must be an integer.
//id should be greater than 2.
//http://localhost:9000/api2/products/1 404 error code
[HttpGet]
[Route("api/v2/products/{id:int:min(2)}", Name = "getProductById")]
public Product retrieveProductfromRepository(int id)
{
Product item = repository.Get(id);
if (item == null)
{
throw new HttpResponseException(HttpStatusCode.NotFound);
}
return item;
}
[HttpGet]
[Route("api/v2/products", Name = "getProductByCategory")]
//http://localhost:9000/api2/products?category=
//http://localhost:9000/api2/products?category=Groceries
public IEnumerable<Product> GetProductsByCategory(string category)
{
return repository.GetAll().Where(
p => string.Equals(p.Category, category, StringComparison.OrdinalIgnoreCase));
}
//Response code: By default, the Web API framework sets the response status code to 200 (OK).
//But according to the HTTP/1.1 protocol, when a POST request results in the creation of a resource, the server should reply with status 201 (Created).
//Location: When the server creates a resource, it should include the URI of the new resource in the Location header of the response.
[HttpPost]
[Route("api/v2/products")]
public HttpResponseMessage PostProduct(Product item)
{
item = repository.Add(item);
var response = Request.CreateResponse<Product>(HttpStatusCode.Created, item);
// Generate a link to the new product and set the Location header in the response.
string uri = Url.Link("getProductById", new { id = item.Id });
response.Headers.Location = new Uri(uri);
return response;
}
[HttpPut]
[Route("api/v2/products/{id:int}")]
public void PutProduct(int id, Product product)
{
product.Id = id;
if (!repository.Update(product))
{
throw new HttpResponseException(HttpStatusCode.NotFound);
}
}
[HttpDelete]
[Route("api/v2/products/{id:int}")]
public void DeleteProduct(int id)
{
repository.Remove(id);
}
}
}
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