一、两个子接口，覆盖全场景

该API提供了两个子接口，满足不同业务需求：

本文以第一个接口——快递物流查询为例，演示如何查询单号78792812069699的物流信息。

实战演示：查询运单号 78792812069699 的物流信息

下面通过 C# 代码调用该接口

接口地址：https://market.aliyun.com/detail/cmapi00065859
using System;
using System.IO;
using System.Net;
using System.Text;
using System.Security.Cryptography.X509Certificates;

public class ExpressQueryTest
{
    private const string host = "https://market.aliyun.com/detail/cmapi00065859"#接口地址;
    private const string path = "/exp/index";
    private const string method = "GET";
    private const string appcode = "你自己的AppCode";   // 替换为真实 AppCode

    public static void Main(string[] args)
    {
        string querys = "no=78792812069699";   // 只需传入单号，可自动识别公司
        string url = host + path;
        if (!string.IsNullOrEmpty(querys))
        {
            url = url + "?" + querys;
        }

        HttpWebRequest httpRequest = null;
        HttpWebResponse httpResponse = null;

        if (host.Contains("https://"))
        {
            ServicePointManager.ServerCertificateValidationCallback = 
                new RemoteCertificateValidationCallback(CheckValidationResult);
            httpRequest = (HttpWebRequest)WebRequest.CreateDefault(new Uri(url));
        }
        else
        {
            httpRequest = (HttpWebRequest)WebRequest.Create(url);
        }

        httpRequest.Method = method;
        httpRequest.Headers.Add("Authorization", "APPCODE " + appcode);

        try
        {
            httpResponse = (HttpWebResponse)httpRequest.GetResponse();
        }
        catch (WebException ex)
        {
            httpResponse = (HttpWebResponse)ex.Response;
        }

        Console.WriteLine(httpResponse.StatusCode);
        Stream st = httpResponse.GetResponseStream();
        StreamReader reader = new StreamReader(st, Encoding.GetEncoding("utf-8"));
        string result = reader.ReadToEnd();
        Console.WriteLine(result);
    }

    public static bool CheckValidationResult(object sender, X509Certificate certificate, 
        X509Chain chain, SslPolicyErrors errors)
    {
        return true;
    }
}

三、返回字段解析