Question

我尝试使用Async方法在PHP页面上发布JSON字符串，如下所示：

using System;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;

namespace test_http
{
    class Product
    {
        public string Name { get; set; }
        public double Price { get; set; }
        public string Category { get; set; }
    }

    class Program
    {
        static void Main()
        {
            RunAsync().Wait();
        }

        static async Task RunAsync()
        {
            using (var client = new HttpClient())
            {
                client.BaseAddress = new Uri("http://localhost/ABC/products.php");
                client.DefaultRequestHeaders.Accept.Clear();
                client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

                // HTTP GET
                HttpResponseMessage response = await client.GetAsync("products/1");
                Console.WriteLine(response.ToString());
                if (response.IsSuccessStatusCode)
                {
                    Product product = await response.Content.ReadAsAsync<Product>();
                    Console.WriteLine("{0}\t${1}\t{2}", product.Name, product.Price, product.Category);
                }

                // HTTP POST
                var gizmo = new Product() { Name = "Gizmo", Price = 100, Category = "Widget" };
                response = await client.PostAsJsonAsync(client.BaseAddress, gizmo);
                Console.WriteLine(response.ToString());

                if (response.IsSuccessStatusCode)
                {
                    Uri gizmoUrl = response.Headers.Location;

                    // HTTP PUT
                    gizmo.Price = 80;   // Update price
                    response = await client.PutAsJsonAsync(gizmoUrl, gizmo);
                    Console.WriteLine(response.ToString());
                    // HTTP DELETE
                    response = await client.DeleteAsync(gizmoUrl);
                    Console.WriteLine(response.ToString());
                }
            }
        }
    }
}

我在控制台窗口的POST，PUT和DELETE操作上获得200状态OK。但是PHP页面没有显示任何内容。 PHP代码：

<?php
$json = json_encode($_POST);   
var_dump(json_decode($json));

?>

我发现正在发布的数据的内容类型显示为＆＃39; text / html＆＃39;在控制台而不是＆＃39; application / json＆＃39;因此PHP无法识别POST。但我不知道我在这里做错了什么。有人可以帮忙吗？

Answer 1

第1，没有必要使用json_encode，因为你已经发送了json。

其次，只有在发送key：value对时才会填充phps global $_POST。如果您要发送json，则应使用输入流：

<?php
var_dump(json_decode(file_get_contents('php://input')));

PostAsJsonAsync以text / html的形式发布到服务器而不是JSON

1 个答案: