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前段时间搞推送来着，安卓方面用到了百度的推送服务，由于只是简单的用到安卓推送的通知功能，所以没用百度推荐的C# SDK，通过借鉴网上的各种资料和百度的API，费了老大劲终于折腾出来一段能用的代码（早知道这么纠结，直接用别人的了。。。强迫症伤不起啊）
/// <summary> /// 百度推送 /// </summary> public class BaiduPush { private const string method = "push_msg"; private const string url = "https://channel.api.duapp.com/rest/2.0/channel/channel"; private const string apikey = "xxxxxxxxxxxxxxxxx"; private const string secret_key = "xxxxxxxxxxxxxxxxxxxxxxxxxxxx"; public static string Push(string user_id, string title, string description, string msg_keys) { DateTime utcNow = DateTime.UtcNow; DateTime epoch = new DateTime(1970, 1, 1, 0, 0, 0); uint timestamp = (uint)(utcNow - epoch).TotalSeconds; uint expires = (uint)(utcNow.AddDays(1) - epoch).TotalSeconds; //一天后过期 Dictionary<string, string> dic = new Dictionary<string, string>(); dic.Add("method", method); dic.Add("apikey", apikey); dic.Add("timestamp", timestamp.ToString()); dic.Add("expires", expires.ToString()); dic.Add("push_type", "1"); //单播 dic.Add("device_type", "3"); //Andriod设备 dic.Add("user_id", user_id); dic.Add("message_type", "1"); //只发通知 dic.Add("messages", "{\"title\":\"" + title + "\",\"description\":\"" + description + "\"}"); dic.Add("msg_keys", msg_keys); //消息标识 相同消息标识的消息会自动覆盖。只支持android。 dic.Add("sign", StructSign("POST", url, dic, secret_key)); StringBuilder sb = new StringBuilder(); foreach (var d in dic) { sb.Append(d.Key + "=" + d.Value + "&"); } sb.Remove(sb.Length - 1, 1); byte[] data = Encoding.UTF8.GetBytes(sb.ToString()); WebClient webClient = new WebClient(); try { webClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");//采取POST方式必须加的header，如果改为GET方式的话就去掉这句话即可 byte[] response = webClient.UploadData(url, "POST", data); return Encoding.UTF8.GetString(response); } catch (WebException ex) { Stream stream = ex.Response.GetResponseStream(); byte[] bs = new byte[256]; int i = 0; int b; while ((b = stream.ReadByte()) > 0) { bs[i++] = (byte)b; } stream.Close(); return Encoding.UTF8.GetString(bs, 0, i); } } /// <summary> /// 构建Sign /// </summary> /// <param name="httpMethod"></param> /// <param name="url"></param> /// <param name="dic"></param> /// <param name="secret_key"></param> /// <returns></returns> private static string StructSign(string httpMethod, string url, Dictionary<string, string> dic, string secret_key) { //按key正序 dic = dic.OrderBy(p => p.Key).ToDictionary(p => p.Key, p => p.Value); StringBuilder sb = new StringBuilder(); //构建键值对 foreach (var d in dic) { sb.Append(d.Key + "=" + d.Value); } string sign = httpMethod + url + sb + secret_key; //url编码 sign = sign.UrlEncode(); //将编码后替换的字符大写，这地方是个坑。。。 char[] cs = new char[sign.Length]; for (int i = 0; i < sign.Length; i++) { cs[i] = sign[i]; if (sign[i] == ‘%‘) { cs[++i] = Convert.ToChar(sign[i].ToString().ToUpper()); cs[++i] = Convert.ToChar(sign[i].ToString().ToUpper()); } } //MD5加密 return new string(cs).MD5(); } }
外加两个扩展方法
System.Web.HttpUtility.UrlEncode需要添加引用System.Web （.net framework 4.0 client profile下面找不到System.Web请切换到.net framework 4.0）
/// <summary> /// MD5加密 /// </summary> /// <param name="str"></param> /// <returns></returns> public static string MD5(this string str) { byte[] bs = new MD5CryptoServiceProvider().ComputeHash(Encoding.UTF8.GetBytes(str)); return BitConverter.ToString(bs).Replace("-", ""); } /// <summary> /// url编码 /// </summary> /// <param name="str"></param> /// <returns></returns> public static string UrlEncode(this string str) { return System.Web.HttpUtility.UrlEncode(str, Encoding.UTF8); }
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原文地址：http://www.cnblogs.com/luludongxu/p/4476318.html
