个人认为百度地图开放平台确实很好用但就是C#的SN校验会出现以下几个问题
一、官方的示例代码说的不清不楚
获取SN函数的Uri应该使用不带域名的Uri
比如：最终请求地址为https://api.map.baidu.com/location/ip?ip=119.126.10.15&coor=gcj02&ak=123456&sn=654321时
AKSNCaculater.CaculateAKSN中的uri参数应该使用https://api.map.baidu.com/location/ip?ip=119.126.10.15&coor=gcj02&ak=123456&sn=654321，而不可以是https://aspi.map.baidu.com/location/ip?coor=gcj02&ip=119.126.10.15&ak=123456&sn=654321
获取SN的时候参数的顺序是怎么样的，发送请求的时候参数的顺序就必须是怎么样
比如：获取SN的时候参数顺序是ip=119.126.10.15&coor=gcj02&ak=123456，那么最终请求地址就应该是https://api.map.baidu.com/location/ip?ip=119.126.10.15&coor=gcj02&ak=123456&sn=654321，而不可以是https://aspi.map.baidu.com/location/ip?coor=gcj02&ip=119.126.10.15&ak=123456&sn=654321
无论如何SN必须在最终请求地址的最后！
比如以上情况下：https://api.map.baidu.com/location/ip?ip=119.126.10.15&coor=gcj02&sn=654321&ak=123456就是一个错误的地址
二、官方MD5加密是错的！
这一个真是把我害惨了，折腾了半天终于发现正确代码（我也是copy别人的，但不管怎么说，官方的MD5加密代码确实是错的）
正确的加密过程如下
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publicstaticstringMD52(stringpassword) { try { System.Security.Cryptography.HashAlgorithm hash = System.Security.Cryptography.MD5.Create(); byte[] hash_out = hash.ComputeHash(System.Text.Encoding.UTF8.GetBytes(password)); varmd5_str = BitConverter.ToString(hash_out).Replace(\”-\”,\”\”); returnmd5_str.ToLower(); } catch { throw; } } |
完整类如下：
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usingSystem; usingSystem.Collections.Generic; usingSystem.Linq; usingSystem.Text; namespaceSATPlatform { publicclassAKSNCaculater { publicstaticstringMD52(stringpassword) { try { System.Security.Cryptography.HashAlgorithm hash = System.Security.Cryptography.MD5.Create(); byte[] hash_out = hash.ComputeHash(System.Text.Encoding.UTF8.GetBytes(password)); varmd5_str = BitConverter.ToString(hash_out).Replace(\”-\”,\”\”); returnmd5_str.ToLower(); } catch { throw; } } publicstaticstringMD5(stringpassword) { byte[] textBytes = System.Text.Encoding.UTF8.GetBytes(password); try { System.Security.Cryptography.MD5CryptoServiceProvider cryptHandler; cryptHandler =newSystem.Security.Cryptography.MD5CryptoServiceProvider(); byte[] hash = cryptHandler.ComputeHash(textBytes); stringret =\”\”; foreach(byteainhash) { ret += a.ToString(\”x\”); } returnret; } catch { throw; } } publicstaticstringUrlEncode(stringstr) { str = System.Web.HttpUtility.UrlEncode(str); byte[] buf = Encoding.ASCII.GetBytes(str);//等同于Encoding.ASCII.GetBytes(str) for(inti = 0; i < buf.Length; i++) if(buf[i] ==\’%\’) { if(buf[i + 1] >=\’a\’) buf[i + 1] -= 32; if(buf[i + 2] >=\’a\’) buf[i + 2] -= 32; i += 2; } returnEncoding.ASCII.GetString(buf);//同上，等同于Encoding.ASCII.GetString(buf) } publicstaticstringHttpBuildQuery(IDictionary<string,string> querystring_arrays) { StringBuilder sb =newStringBuilder(); foreach(variteminquerystring_arrays) { sb.Append(UrlEncode(item.Key)); sb.Append(\”=\”); sb.Append(UrlEncode(item.Value)); sb.Append(\”&\”); } sb.Remove(sb.Length – 1, 1); returnsb.ToString(); } publicstaticstringCaculateAKSN(stringak,stringsk,stringurl, IDictionary<string,string> querystring_arrays) { varqueryString = HttpBuildQuery(querystring_arrays); varstr = UrlEncode(url +\”?\”+ queryString + sk); returnMD52(str); } } } |
以上就是我被坑的经历，希望对其他人有用~~~
最后再附带上我的请求代码
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/// <summary> /// 返回指定IP的位置对应的百度城市代码（利用百度地图API /// </summary> /// <param name=\”IP\”>需要查询的IP地址</param> /// <returns></returns> publicstringGetPlace(stringIP) { DataTable BasicIn = Reader(\”SELECT Th_MapAK , Th_MapSK FROM S_Inf\”); Dictionary<string,string> P =newDictionary<string,string>() { {\”ip\”,IP }, {\”coor\”,\”gcj02\”}, {\”ak\”,BasicIn.Rows[0][\”Th_MapAK\”].ToString() } //{\”address\”,\”百度大厦\” }, //{\”output\”,\”json\” }, //{\”ak\”,\”yourak\” } }; stringGetSN = AKSNCaculater.CaculateAKSN(BasicIn.Rows[0][\”Th_MapAK\”].ToString(), BasicIn.Rows[0][\”Th_MapSK\”].ToString(),\”/location/ip\”, P); //string GetSN = AKSNCaculater.CaculateAKSN(\”yourak\”, \”yoursk\”, \”/geocoder/v2/\”, P); HttpWebRequest NewRequest = (HttpWebRequest)WebRequest.Create(\”https://api.map.baidu.com/location/ip?\”+ AKSNCaculater.HttpBuildQuery(P) +\”&sn=\”+ GetSN); NewRequest.Headers.Add(\”charset\”,\”utf-8\”); NewRequest.Method =\”GET\”; NewRequest.ContentType =\”application/json\”; NewRequest.UserAgent =\”Windows KeHuDuan\”; NewRequest.Timeout = 5000;//设置超时时间 HttpWebResponse Response = (HttpWebResponse)NewRequest.GetResponse(); Stream ResponseStream = Response.GetResponseStream(); StreamReader ResponseStreamReader =newStreamReader(ResponseStream); stringRes = ResponseStreamReader.ReadToEnd(); ResponseStreamReader.Close(); ResponseStream.Close(); JObject ResJ =newJObject(); try { ResJ = JObject.Parse(Res); } catch(Exception) { GiveErr(ErrCode.ThirdPartyError); } if(ResJ[\”status\”].ToString() !=\”0\”) GiveErr(ErrCode.ThirdPartyError); returnResJ[\”content\”][\”address_detail\”][\”city_code\”].ToString(); } |
