SmartWeatherAPI_Lite_WebAPI C# 獲取key加密

 中國氣象局面向網絡媒體、手機廠商、第三方氣象服務機構等用戶，經過 web 方式提供數據氣象服務的官方載體。

 在一週前已經申請到appid，可是苦於沒有C#版的key 的算法，一直驗證不經過，通過幾天查詢資料，如今提供一份C#版的HMAC-SHA1的加密算法

 比較簡單，分項給你們，你們能夠參考一下。

 string GetKey(string appid, string privateKey, string areaId, string date, string type) { //使用SHA1的HMAC  HMAC hmac = HMACSHA1.Create(); var publicKey = "http://webapi.weather.com.cn/data/?areaid={0}&type={1}&date={2}&appid={3}"; var data = System.Text.Encoding.UTF8.GetBytes(string.Format(publicKey, areaId, type, date, appid)); //密鑰 var key = System.Text.Encoding.UTF8.GetBytes(privateKey); hmac.Key = key; //對數據進行簽名 var signedData = hmac.ComputeHash(data); return Convert.ToBase64String(signedData); }

 

類型和接口已經修改，請看最新的代碼：

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
//項目添加System.Runtime.Serialization引用
using System.Runtime.Serialization.Json;
using System.Security.Cryptography;
using System.Web;

namespace MvcApplication1
{
    public class Weather
    {
        //天氣編碼對應表
        private Dictionary<string, string> weatherInfo = new Dictionary<string, string>();
        //風力編碼對應表
        private Dictionary<string, string> WindInfo = new Dictionary<string, string>();
        //風力方向對應表
        private Dictionary<string, string> WindInfoDir = new Dictionary<string, string>();

        private DataContractJsonSerializer ser;
        private byte[] buff = new byte[5 * 1024];

        public Weather()
        {
            #region 初始化編碼表
            weatherInfo.Add("00", "晴");
            weatherInfo.Add("01", "多雲");
            weatherInfo.Add("02", "陰");
            weatherInfo.Add("03", "陣雨");
            weatherInfo.Add("04", "雷陣雨");
            weatherInfo.Add("05", "雷陣雨伴有冰雹");
            weatherInfo.Add("06", "雨夾雪");
            weatherInfo.Add("07", "小雨");
            weatherInfo.Add("08", "中雨");
            weatherInfo.Add("09", "大雨");
            weatherInfo.Add("10", "暴雨");
            weatherInfo.Add("11", "大暴雨");
            weatherInfo.Add("12", "特大暴雨");
            weatherInfo.Add("13", "陣雪");
            weatherInfo.Add("14", "小雪");
            weatherInfo.Add("15", "中雪");
            weatherInfo.Add("16", "大雪");
            weatherInfo.Add("17", "暴雪");
            weatherInfo.Add("18", "霧");
            weatherInfo.Add("19", "凍雨");
            weatherInfo.Add("20", "沙塵暴");
            weatherInfo.Add("21", "小到中雨");
            weatherInfo.Add("22", "中到大雨");
            weatherInfo.Add("23", "大到暴雨");
            weatherInfo.Add("24", "暴雨到大暴雨");
            weatherInfo.Add("25", "大暴雨到特大暴雨");
            weatherInfo.Add("26", "小到中雪");
            weatherInfo.Add("27", "中到大雪");
            weatherInfo.Add("28", "大到暴雪");
            weatherInfo.Add("29", "浮塵");
            weatherInfo.Add("30", "揚沙");
            weatherInfo.Add("31", "強沙塵暴");
            weatherInfo.Add("53", "霧霾");
            weatherInfo.Add("99", "無");

            WindInfoDir.Add("0", "無持續風向");
            WindInfoDir.Add("1", "東北風");
            WindInfoDir.Add("2", "東風");
            WindInfoDir.Add("3", "東南風");
            WindInfoDir.Add("4", "南風");
            WindInfoDir.Add("5", "西南風");
            WindInfoDir.Add("6", "西風");
            WindInfoDir.Add("7", "西北風");
            WindInfoDir.Add("8", "北風");
            WindInfoDir.Add("9", "旋轉風");

            WindInfo.Add("0", "微風");
            WindInfo.Add("1", "3-4級");
            WindInfo.Add("2", "4-5級");
            WindInfo.Add("3", "5-6級");
            WindInfo.Add("4", "6-7級");
            WindInfo.Add("5", "7-8級");
            WindInfo.Add("6", "8-9級");
            WindInfo.Add("7", "9-10級");
            WindInfo.Add("8", "10-11級");
            WindInfo.Add("9", "11-12級");
            #endregion

            ser = new DataContractJsonSerializer(typeof(WeatherJson));
        }

        public void RefreshWeather()
        {
            bool update = false;
            //string baseurl = "";
            string baseurl = "http://open.weather.com.cn/data/?areaid={0}&type={1}&date={2}&appid={3}";

            var cityCode = "101180901";
            //指數:index_f(基礎接口)；index_v(常規接口) 3天預報:forecast_f(基礎接口)；forecast_v(常規接口)
            var weatherType = "forecast_f";
            var appID = "appID";
            var private_key = "private_key";

            string url = GetSmartWeatherApi(baseurl, cityCode, weatherType, DateTime.Now.ToString("yyyyMMddHHmm"), appID, private_key);
            int l = 0;
            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
                request.UserAgent = @"Mozilla/5.0 (Windows; U; Windows NT 6.0; zh-CN; rv:1.8.1.4) Gecko/20070515 Firefox/2.0.0.4";
                //從指定的URL中獲取天氣信息（JSON數據）
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                Stream rs = response.GetResponseStream();
                l = rs.Read(buff, 0, buff.Length);
                rs.Close();
            }
            catch (Exception ex)
            {
                //網絡鏈接失敗;
            }
            //反序列化爲實體
            var mStream = new MemoryStream(buff, 0, l);
            WeatherJson w;
            try
            {
                w = (WeatherJson)ser.ReadObject(mStream);
                if (w != null)
                {
                    foreach (var item in w.f.f1)
                    {
                        item.fa_des = weatherInfo.ContainsKey(item.fa) ? weatherInfo[item.fa] : string.Empty;
                        item.fb_des = weatherInfo.ContainsKey(item.fb) ? weatherInfo[item.fb] : string.Empty;
                        item.fe_des = WindInfoDir.ContainsKey(item.fe) ? WindInfoDir[item.fe] : string.Empty;
                        item.ff_des = WindInfoDir.ContainsKey(item.ff) ? WindInfoDir[item.ff] : string.Empty;
                        item.fg_des = WindInfo.ContainsKey(item.fg) ? WindInfo[item.fg] : string.Empty;
                        item.fh_des = WindInfo.ContainsKey(item.fh) ? WindInfo[item.fh] : string.Empty;
                    }
                }
            }
            catch (System.Runtime.Serialization.SerializationException)
            {
                //反序列化失敗
                throw;
            }

            //獲取天氣預報
            foreach (var item in w.f.f1)
            {
                string weather = (item.fa == item.fb) ? item.fa_des : item.fa_des + "轉" + item.fb_des;
                string temperature = item.fc + "℃ ~ " + item.fd + "℃";
                string wind = item.fg == "0" ? item.fg_des : item.fe_des + " " + item.fg_des;
            }
        }

        private string GetSmartWeatherApi(string _baseUrl, string _areaId, string _type, string _date, string _appID, string _privateKey)
        {
            string publicKey = string.Format(_baseUrl, _areaId, _type, _date, _appID);
            string fullUrl = string.Format(_baseUrl, _areaId, _type, _date, _appID.Substring(0, 6));
            fullUrl = string.Format("{0}&key={1}", fullUrl, GetSmartWeatherKeyCode(publicKey, _privateKey));
            return fullUrl;
        }
        private string GetSmartWeatherKeyCode(string _publicKey, string _privateKey)
        {
            //使用SHA1的HMAC
            HMAC hmac = HMACSHA1.Create();
            Byte[] data = System.Text.Encoding.UTF8.GetBytes(_publicKey);
            //密鑰
            Byte[] key = System.Text.Encoding.UTF8.GetBytes(_privateKey);
            hmac.Key = key;

            //對數據進行簽名
            var signedData = hmac.ComputeHash(data);
            string keyCode = Convert.ToBase64String(signedData);
            keyCode = System.Web.HttpUtility.UrlEncode(keyCode);
            return keyCode;
        }

    }

    #region 天氣實體類，用於獲取氣象局json數據反序列化
    public class WeatherJson
    {
        /// <summary>
        /// 城市
        /// </summary>
        public WeatherC c { get; set; }
        /// <summary>
        /// 預報
        /// </summary>
        public WeatherF f { get; set; }
        /// <summary>
        /// 實況
        /// </summary>
        public WeatherL l { get; set; }
        /// <summary>
        /// 指數
        /// </summary>
        public WeatherI i { get; set; }
    }
    /// <summary>
    /// 實況，type=observe
    /// 示例：
    /// "l":{ 
    /// "l1":8"
    /// "l2":"38"
    /// "l3":"6"
    /// "l4":"3"
    /// "l7":"11:00"
    /// }
    /// </summary>
    public class WeatherL
    {
        /// <summary>
        /// 當前溫度(攝氏度)
        /// </summary>
        public string l1 { get; set; }
        /// <summary>
        /// 當前溼度(單位%)
        /// </summary>
        public string l2 { get; set; }
        /// <summary>
        /// 當前風力(單位是級，無需根據風力編碼表取值，直接顯示便可)
        /// </summary>
        public string l3 { get; set; }
        /// <summary>
        /// 當前風向編號
        /// </summary>
        public string l4 { get; set; }
        /// <summary>
        /// 實況發佈時間
        /// </summary>
        public string l7 { get; set; }
    }
    /// <summary>
    /// 指數，type=index
    /// 示例：
    /// "i":[
    /// {
    /// "i1":"ct",
    /// "i2":"穿衣指數",
    /// "i3":"" ,
    /// "i4":"熱」,
    /// "i5":"天氣熱，建議着短裙、短褲、短薄外套、T 恤等夏季服裝。"
    /// },
    /// ]
    /// </summary>
    public class WeatherI
    {
        /// <summary>
        /// 指數簡稱
        /// </summary>
        public string i1 { get; set; }
        /// <summary>
        /// 指數中文名稱
        /// </summary>
        public string i2 { get; set; }
        /// <summary>
        /// 指數中文別名
        /// </summary>
        public string i3 { get; set; }
        /// <summary>
        /// 指數級別
        /// </summary>
        public string i4 { get; set; }
        /// <summary>
        /// 指數內容
        /// </summary>
        public string i7 { get; set; }
    }
    /// <summary>
    /// 預報，城市信息，type=forecast3d
    /// </summary>
    public class WeatherC
    {
        /// <summary>
        /// 區域 ID 
        /// </summary>
        public string c1 { get; set; }
        /// <summary>
        /// 城市英文名 
        /// </summary>
        public string c2 { get; set; }
        /// <summary>
        /// 城市英文名 
        /// </summary>
        public string c3 { get; set; }
        /// <summary>
        /// 城市所在市英文名 
        /// </summary>
        public string c4 { get; set; }
        /// <summary>
        /// 城市所在市中文名
        /// </summary>
        public string c5 { get; set; }
        /// <summary>
        /// 城市所在省英文名 
        /// </summary>
        public string c6 { get; set; }
        /// <summary>
        /// 城市所在省中文名 
        /// </summary>
        public string c7 { get; set; }
        /// <summary>
        /// 城市所在國家英文名 
        /// </summary>
        public string c8 { get; set; }
        /// <summary>
        /// 城市所在國家中文名
        /// </summary>
        public string c9 { get; set; }
        /// <summary>
        /// 城市級別 
        /// </summary>
        public string c10 { get; set; }
        /// <summary>
        /// 城市區號 
        /// </summary>
        public string c11 { get; set; }
        /// <summary>
        /// 城市區號 
        /// </summary>
        public string c12 { get; set; }
        /// <summary>
        /// 經度
        /// </summary>
        public string c13 { get; set; }
        /// <summary>
        /// 緯度 
        /// </summary>
        public string c14 { get; set; }
        /// <summary>
        /// 海拔 
        /// </summary>
        public string c15 { get; set; }
        /// <summary>
        /// 雷達站號 
        /// </summary>
        public string c16 { get; set; }
    }
    /// <summary>
    /// 預報，type=forecast3d
    /// </summary>
    public class WeatherF
    {
        /// <summary>
        /// 預報發佈時間
        /// </summary>
        public string f0 { get; set; }
        /// <summary>
        /// 3天的天氣預報
        /// </summary>
        public WeatherF1[] f1 { get; set; }
    }
    public class WeatherF1
    {
        /// <summary>
        /// 白每天氣現象編號
        /// </summary>
        public string fa { get; set; }
        public string fa_des { get; set; }
        /// <summary>
        /// 晚上天氣現象編號
        /// </summary>
        public string fb { get; set; }
        public string fb_des { get; set; }
        /// <summary>
        /// 白每天氣溫度(攝氏度)
        /// </summary>
        public string fc { get; set; }
        /// <summary>
        /// 晚上天氣溫度(攝氏度)
        /// </summary>
        public string fd { get; set; }
        /// <summary>
        /// 白天風向編號
        /// </summary>
        public string fe { get; set; }
        public string fe_des { get; set; }
        /// <summary>
        /// 晚上風向編號
        /// </summary>
        public string ff { get; set; }
        public string ff_des { get; set; }
        /// <summary>
        /// 白天風力編號
        /// </summary>
        public string fg { get; set; }
        public string fg_des { get; set; }
        /// <summary>
        /// 晚上風力編號
        /// </summary>
        public string fh { get; set; }
        public string fh_des { get; set; }
        /// <summary>
        /// 日出日落時間(中間用|分割)
        /// </summary>
        public string fi { get; set; }
    }
    #endregion
}