如何使用WinRT将json发布到网站？

Question

我正在尝试将此JSON数据字符串发布到我的php网站：

{
    "tag":"login"
    "email":"email@email.com"
    "password":"P@ssw0rd"
}

这是我的C＃代码：

        HttpClient client = new HttpClient();
        client.BaseAddress = new Uri("http://localhost/login/");
        string link = "http://localhost/login/";

        UserCredentials cred = new UserCredentials(email.Text, pass.Password.ToString());
        var data = new Dictionary<string, List<UserCredentials>>();
        string json = JsonConvert.SerializeObject(data, Formatting.Indented);


        HttpResponseMessage re = await client.PostAsync(link, new StringContent(json));

用户凭证类：

public class UserCredentials
{
    public UserCredentials(string user, string pass)
    {
        User = user;
        Pass = pass;
        Tag = "login";
    }

    internal string User;
    internal string Pass;
    internal string Tag;
}

在我的PHP脚本中：

<?php

if (isset($_POST['tag']) && $_POST['tag'] != '') {
  echo "got tags";
else 
  echo "didn't get anything";
?>

有谁知道我应该如何通过postasync方法发送标签？ 我得到“什么都没得到” ..请帮助

Answer 1

首先，修复您的UserCredentials类。 将成员公开，而不是内部成员。

public class UserCredentials
{
    public UserCredentials(string user, string pass)
    {
        User = user;
        Pass = pass;
        Tag = "login";
    }

    public string User;
    public string Pass;
    public string Tag;
}

其次，仅序列化您的凭据。

UserCredentials cred = new UserCredentials(email.Text, pass.Password.ToString());
string json = JsonConvert.SerializeObject(cred, Formatting.Indented);
System.Diagnostics.Debug.WriteLine(json);

您将在“输出”窗口中看到以下内容：

{
  "User": "me@hotmail.com",
  "Pass": "ILoveToEatGrapes",
  "Tag": "login"
}

第三，将StringContent替换为FormUrlEncodedContent

如果使用的是PHP $_POST ，则必须在HTTP请求中发送类似key1=value1&key2=value2 。 这称为x-www-form-urlencoded并且HttpClient包含正确的类： FormUrlEncodedContent 。

FormUrlEncodedContent接收键/值对的字典。

// Create the list of keys and values.
var data = new Dictionary<string, string>();
data["tag"] = json;

// Send my keys and values.
HttpClient client = new HttpClient();
string link = "http://localhost/login/";
HttpResponseMessage re = await client.PostAsync(link, new FormUrlEncodedContent(data));

这将通过连接发送：

POST /login/ HTTP/1.1
Content-Type: application/x-www-form-urlencoded
Host: localhost
Content-Length: 142
Expect: 100-continue
Connection: Keep-Alive

tag=%7B%0D%0A++%22User%22%3A+%22me%40hotmail.com%22%2C%0D%0A++%22Pass%22%3A+%22I
LoveToEatGrapes%22%2C%0D%0A++%22Tag%22%3A+%22login%22%0D%0A%7D

第四，在PHP中使用您的数据

正如您在上面看到的，数据使用很多百分号编码。 PHP将自动为您解码数据，因此您无需担心。

要将凭据从json转换为数组，可以使用json_decode

$cred = json_decode($_POST['tag']);

Answer 2

创建但未添加到data凭证可能会导致一个空集

UserCredentials cred = new UserCredentials(email.Text, pass.Password.ToString());
var data = new Dictionary<string, List<UserCredentials>>();
data["key"] = new List<UserCredentials>{cred};
string json = JsonConvert.SerializeObject(data, Formatting.Indented);

Answer 3

为什么要使用字典（实际上，您实际上是在创建它，但没有填写它）而不是立即使用该对象？

    UserCredentials cred = new UserCredentials(email.Text, pass.Password.ToString());
    string json = JsonConvert.SerializeObject(cred, Formatting.Indented);