开题报告旅游网站建设/个人在百度上发广告怎么发

一、故事

 

      首先通过CDO.Message来获取邮件EML相关数据：邮件标题、邮件内容、邮件附件、发件人、收件人、ＣＣ主要就这么几个，其次通过MailMessage来组织邮件通过Python来发送邮件！

  

     就这么简简单单的需求！！问题出现了，中文附件名！Web打开始终是乱码！使用邮件客户端FireFox是OK的，查看了FireFox源码发现是乱码，这点说明FireFox的强大，非常强大！

    

Content-Type: application/octet-stream; name=鎶ラ攢鍗昪s.xlsx
Content-Transfer-Encoding: base64
Content-Disposition: attachment

  见图见图

 

 

……

二、折腾中

 

     出了问题想办法，一定要抱着始终相信一定可以解决的尤其是搞IT的一定有方法！大事化小，小事化无。先找卧底！第一个想到的便是CDO.Message那就从他下手。最后发现他是平民！

 

     先说说走的路，干货的路，其他摸索的方法想了下数数应该有4,5种了：

    读取EML转换成流，再获取附件再解码，发现中文名OK

     先看结果

    

    再看看代码

    

public class AttachmentExtractor{private static int imageCount;public static void Method(string path){StreamReader reader = null;try{reader = new StreamReader(path);string line;StringBuilder sb = new StringBuilder();while ((line = reader.ReadLine()) != null){sb.Append(line.ToLower());if (line.ToLower().StartsWith("content-disposition:attachment;") || line.ToLower().StartsWith("content-disposition: attachment;")) // found attachment 
                    { string fileName = GetAttachment(reader, line);fileName = System.Text.Encoding.UTF8.GetString(Convert.FromBase64String(fileName.Replace("=?utf-8?B?", "").Replace("?=", ""))); }if (line.ToLower().StartsWith("content-type:image/")) // found embedded image
                    {ExtractContent(reader, GetImage(reader, line));}}}catch (IOException){Console.WriteLine("找不到文件!");}finally{if (reader != null) reader.Close();}}private static string GetAttachment(TextReader reader, string line){if (!line.Contains("filename")){line = reader.ReadLine(); // Thunderbird: filename start at//second line
            }return GetFilenameNew(reader, line);}private static string GetImage(TextReader reader, string line){if (!line.Contains("name")){line = reader.ReadLine(); // Thunderbird: filename start at//second line
            }if (!line.Contains("name")) // embedded image does not have name
            {AdvanceToEmptyLine(reader);return "image" + imageCount++ + ".jpg"; // default to jpeg
            }return GetFilename(reader, line);}private static string GetFilename(TextReader reader, string line){string filename;int filenameStart = line.IndexOf('"') + 1;if (filenameStart > 0){filename = line.Substring(filenameStart, line.Length -filenameStart - 1);}else // filename does not have quote
            {filenameStart = line.IndexOf('=') + 1;filename = line.Substring(filenameStart, line.Length -filenameStart);}AdvanceToEmptyLine(reader);return filename;}private static string GetFilenameNew(TextReader reader, string line){string filename;int filenameStart = line.IndexOf('"') + 1;if (filenameStart > 0){filename = line.Substring(filenameStart, line.Length -filenameStart - 1);}else // filename does not have quote
            {filenameStart = line.IndexOf('=') + 1;filename = line.Substring(filenameStart, line.Length -filenameStart);} return filename;}private static void AdvanceToEmptyLine(TextReader reader){string line;while ((line = reader.ReadLine()) != null){if (String.IsNullOrEmpty(line)) break;}}private static void ExtractContent(TextReader reader, string filename){string line;var content = new StringBuilder();while ((line = reader.ReadLine()) != null){if (String.IsNullOrEmpty(line)) break;content.Append(line);}if (content.Length > 0){byte[] buffer = Convert.FromBase64String(content.ToString());#region 7.7if (!File.Exists(filename)){return;} #endregionusing (Stream writer = new FileStream(filename,FileMode.Create)){writer.Write(buffer, 0, buffer.Length);}}}}

public RedEmail(){InitializeComponent();this.txtEmailPath.Text = "C:\\Users\\Administrator\\Desktop\\4a3266e6-23bd-11e5-9703-0050569a7cc2.eml";AttachmentExtractor.Method(txtEmailPath.Text);}

 

   仔细看完代码会发现获取的附件名是编码过的，需要截取。这个要注意！发现经常不写写，不说说都不知道如何表达我那被困的感受！！！不过！有结果就是胜利！如下：

   可喜的是，我找到了原因：CDO.Message不是卧底！是个良民！！！他只是一个善良的二道贩子！

 

三、看到曙光

    好了，总共就两人，一个平民了，那么另一个一定是卧底咯-MailMessage

    先看胜利的结果，这个喜悦之情那！！

    

   一个是EML里面的附件-乱码，一个是通过改良后代码上传上去的-OK……（ps 写博客都不忘给我老婆店铺做广告，主要是因为我们博客园老牛B了，经常会被其他网站转载，又不写转载信息！）

   搞IT的代码最直接看看代码，如下：   

                //MemoryStream ms =//    new MemoryStream(File.ReadAllBytes(@"C:\\Users\\Administrator\\Desktop\\RDP_需求规格说明书.docx"));////message.Attachments.Add(new System.Net.Mail.Attachment(ms, "RDP_需求规格说明书.docx"));//System.Net.Mime.ContentType ct = new System.Net.Mime.ContentType(System.Net.Mime.MediaTypeNames.Text.Plain);//System.Net.Mail.Attachment attach = new System.Net.Mail.Attachment(ms, ct);//attach.ContentDisposition.FileName = "产品经理2.docx";//attach.NameEncoding = Encoding.GetEncoding("utf-8"); //      `message.Attachments.Add(attach);
System.Net.Mail.Attachment attachment = AttachmentHelper.CreateAttachment(@"C:\\Users\\Administrator\\Desktop\\产品经理2.jpg", "产品经理2.jpg", TransferEncoding.Base64);message.Attachments.Add(attachment);//var attachment = new Attachment(new MemoryStream(File.ReadAllBytes(@"C:\\Users\\Administrator\\Desktop\\产品经理2.jpg")), new System.Net.Mime.ContentType("application/vnd.ms-excel"));////bool flag = File.Exists(@"C:\\Users\\Administrator\\Desktop\\产品经理2.jpg");//FileStream fs = new FileStream(@"C:\\Users\\Administrator\\Desktop\\产品经理2.jpg", FileMode.Open, FileAccess.Read);//System.Net.Mime.ContentType ct = new System.Net.Mime.ContentType(System.Net.Mime.MediaTypeNames.Text.Plain);//System.Net.Mail.Attachment attach = new System.Net.Mail.Attachment(fs, ct);//attach.ContentDisposition.FileName =  "产品经理2.jpg";//fs.Close();//message.Attachments.Add(attach);   

看到了么！注释的就是实验的！我说我是折腾了半天解决的！

  好了，揭开神秘的面纱AttachmentHelper　　

 public class AttachmentHelper{public static System.Net.Mail.Attachment CreateAttachment(string attachmentFile, string displayName, TransferEncoding transferEncoding){System.Net.Mail.Attachment attachment = new System.Net.Mail.Attachment(attachmentFile);attachment.TransferEncoding = transferEncoding;string tranferEncodingMarker = String.Empty;string encodingMarker = String.Empty;int maxChunkLength = 0;switch (transferEncoding){case TransferEncoding.Base64:tranferEncodingMarker = "B";encodingMarker = "UTF-8";maxChunkLength = 30;break;case TransferEncoding.QuotedPrintable:tranferEncodingMarker = "Q";encodingMarker = "ISO-8859-1";maxChunkLength = 76;break;default:throw (new ArgumentException(String.Format("The specified TransferEncoding is not supported: {0}", transferEncoding, "transferEncoding")));}attachment.NameEncoding = Encoding.GetEncoding(encodingMarker);string encodingtoken = String.Format("=?{0}?{1}?", encodingMarker, tranferEncodingMarker);string softbreak = "?=";string encodedAttachmentName = encodingtoken;if (attachment.TransferEncoding == TransferEncoding.QuotedPrintable)encodedAttachmentName = HttpUtility.UrlEncode(displayName, Encoding.Default).Replace("+", " ").Replace("%", "=");elseencodedAttachmentName = System.Convert.ToBase64String(Encoding.UTF8.GetBytes(displayName));encodedAttachmentName = SplitEncodedAttachmentName(encodingtoken, softbreak, maxChunkLength, encodedAttachmentName);attachment.Name = encodedAttachmentName;return attachment;}private static string SplitEncodedAttachmentName(string encodingtoken, string softbreak, int maxChunkLength, string encoded){int splitLength = maxChunkLength - encodingtoken.Length - (softbreak.Length * 2);var parts = SplitByLength(encoded, splitLength);string encodedAttachmentName = encodingtoken;foreach (var part in parts)encodedAttachmentName += part + softbreak + encodingtoken;encodedAttachmentName = encodedAttachmentName.Remove(encodedAttachmentName.Length - encodingtoken.Length, encodingtoken.Length);return encodedAttachmentName;}private static IEnumerable<string> SplitByLength(string stringToSplit, int length){while (stringToSplit.Length > length){yield return stringToSplit.Substring(0, length);stringToSplit = stringToSplit.Substring(length);}if (stringToSplit.Length > 0) yield return stringToSplit;}}

这个牛B的类不是我写的！声明下！我可没那么牛×，是哥千辛万苦+输入了英文才找到的！更坚定了我要学好英文的夙愿！！！！

 

 

四、后话

    好了，可以安心改改代码，发布一个Demo了。

 

    总结下：

     1、要有不放弃不抛弃。

     2、要敢自我调侃的娱乐精神。

     3、关键时刻别忘了Google，国外的月亮有时候真的比国内圆！

 

一口气，好了，我去WC 憋死我了………………