#region
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using System;
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using System.IO;
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using System.Net;
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using System.Security.Cryptography;
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using System.Text;
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using System.Threading;
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using System.Web;
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using System.Windows.Forms;
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using CSFrameworkV5.Core;
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using Newtonsoft.Json;
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#endregion
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namespace CSFrameworkV5.Language
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{
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/// <summary>
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/// 百度翻译
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/// </summary>
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public class BaiduTrans
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{
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private string _appKey;
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private string _secretKey;
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private int _TryCount;
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/// <summary>
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/// 屏蔽默认构造器
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/// </summary>
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private BaiduTrans()
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{
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}
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public BaiduTrans(string appKey, string secretKey)
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{
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_appKey = appKey;
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_secretKey = secretKey;
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}
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//付费接口
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public bool IsNoMoney { get; set; }
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//使用免费翻译
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public bool IsUseFreeAPI { get; set; }
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/// <summary>
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/// 百度翻译免费账号
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/// </summary>
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/// <returns></returns>
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public static BaiduTrans CreateDefault()
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{
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//国鹏免费账号
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var tran =
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new BaiduTrans("20210427000804053", "5ZkKRBKxYyndy7_VhhLS");
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tran.IsUseFreeAPI = true;
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return tran;
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}
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// 计算MD5值
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public static string EncryptString(string str)
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{
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var md5 = MD5.Create();
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// 将字符串转换成字节数组
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var byteOld = Encoding.UTF8.GetBytes(str);
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// 调用加密方法
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var byteNew = md5.ComputeHash(byteOld);
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// 将加密结果转换为字符串
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var sb = new StringBuilder();
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foreach (var b in byteNew)
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// 将字节转换成16进制表示的字符串，
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sb.Append(b.ToString("x2"));
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// 返回加密的字符串
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return sb.ToStringEx();
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}
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/// <summary>
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/// 还原特殊符号
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/// </summary>
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/// <param name="content">原始内容</param>
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/// <param name="baiduTrans">翻译后内容</param>
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/// <returns></returns>
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private static string GetResult(string content, string baiduTrans)
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{
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if (string.IsNullOrWhiteSpace(baiduTrans)) return baiduTrans;
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//下滑线,check_time=检查\u时间
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if (baiduTrans.ToLower().IndexOf(@"\u") > 0)
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baiduTrans = baiduTrans.Replace(@"\u", "_").Replace(@"\U", "_");
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if (baiduTrans.ToLower().IndexOf(@"\ u") > 0 &&
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content.IndexOf("_") > 0)
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baiduTrans = baiduTrans.Replace(@"\ u", "_")
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.Replace(@"\ U", "_");
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if (baiduTrans.ToLower().IndexOf(@"\ ") > 0 &&
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content.IndexOf("_") > 0)
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baiduTrans = baiduTrans.Replace(@"\ ", "_");
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if (baiduTrans.ToLower().IndexOf(@"\") > 0 &&
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content.IndexOf("_") > 0)
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baiduTrans = baiduTrans.Replace(@"\", "_");
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//VCHAR39==>VCHAR39公司
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if (baiduTrans.LastIndexOf("公司") > 0)
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{
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//尾部是公司
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var ss = baiduTrans.Substring(baiduTrans.LastIndexOf("公司"), 2);
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if (ss == "公司" &&
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(baiduTrans.ToLower().IndexOf("company") < 0 ||
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baiduTrans.ToLower().IndexOf("corporation") < 0 ||
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baiduTrans.ToLower().IndexOf("corp") < 0))
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baiduTrans = baiduTrans.Replace("公司", "");
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}
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//'；单引号，转换为全局单引号
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if (baiduTrans.LastIndexOf("'") > 0)
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baiduTrans = baiduTrans.Replace("'；", "‘")
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.Replace("'", "‘").Replace("'", "‘");
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return baiduTrans.Trim();
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}
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/// <summary>
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/// 翻译内容
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/// </summary>
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/// <param name="content">内容</param>
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/// <param name="from">源语言</param>
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/// <param name="to">目标语言</param>
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/// <returns></returns>
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public string Tran(string content, string from = "zh",
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string to = "eng")
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{
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if (string.IsNullOrWhiteSpace(content)) return string.Empty;
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//截取左右空格空白字符
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content = content.Trim();
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//如果使用免费翻译API,访问频率受限1s翻译一次
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if (IsUseFreeAPI)
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{
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Application.DoEvents();
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Thread.Sleep(1000);
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}
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//余额不足，不翻译
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if (IsNoMoney) return content;
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var q = content; // 原文
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var rd = new Random();
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var salt = rd.Next(100000).ToStringEx();
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var appId = _appKey; // 改成您的APP ID
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var secretKey = _secretKey; // 改成您的密钥
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//MD5
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var sign = EncryptString(appId + q + salt + secretKey);
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var url = "http://api.fanyi.baidu.com/api/trans/vip/translate?";
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url += "q=" + HttpUtility.UrlEncode(q);
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url += "&from=" + from;
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url += "&to=" + to;
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url += "&appid=" + appId;
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url += "&salt=" + salt;
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url += "&sign=" + sign;
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var request = (HttpWebRequest)WebRequest.Create(url);
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request.Method = "GET";
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request.ContentType = "text/html;charset=UTF-8";
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request.UserAgent = null;
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request.Timeout = 6000;
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var response = (HttpWebResponse)request.GetResponse();
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var myResponseStream = response.GetResponseStream();
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var myStreamReader = new StreamReader(myResponseStream,
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Encoding.GetEncoding("utf-8"));
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var retString = myStreamReader.ReadToEnd();
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myStreamReader.Close();
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myResponseStream.Close();
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var data =
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JsonConvert.DeserializeObject<BaiduTransResult>(retString);
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//翻译成功
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if (data != null && data.trans_result != null &&
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data.trans_result.Count > 0)
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{
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var str = data.trans_result[0].dst;
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//HTML转译
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str = HttpUtility.HtmlDecode(str);
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var result = GetResult(content, str); //特殊处理
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_TryCount = 0; //翻译成功，计算器重置
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return result;
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}
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if (data.error_code == "54004")
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{
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//{"error_code":"54004","error_msg":"Please recharge"}
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IsNoMoney = true;
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//SetFreeAccount();
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}
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else if (data.error_code == "54003")
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{
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//54003,Invalid Access Limit
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//SetFreeAccount1();
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//流量限制，尝试最多翻译3次
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_TryCount++;
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if (_TryCount < 5) return Tran(content);
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}
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else if (!string.IsNullOrEmpty(data.error_msg))
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{
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throw new Exception(
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$"调用百度翻译API发生错误：{data.error_code},{data.error_msg}");
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}
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_TryCount = 0;
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return content;
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}
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public class BaiduTransKey
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{
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public string ApiKey { get; set; }
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public string SecureKey { get; set; }
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}
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}
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}
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