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POHow to read mixed file of byte and string
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  1. POHow to read mixed file of byte and string
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    copied!<p>I've a mixed file with a lot of string line and part of byte encoded data. Example: </p> <pre><code>--Begin Attach Content-Info: /Format=TIF Content-Description: 30085949.tif (TIF File) Content-Transfer-Encoding: binary; Length=220096 II*II* Îh ÿÿÿÿÿÿü³küìpsMg›Êq™Æ™Ôd™‡–h7ÃAøAú áùõ=6?Eã½/ô|û ƒú7z:&gt;„Çÿý&lt;þ¯úýúßj?å¿þÇéöûþ“«ÿ¾ÁøKøÈ%ŠdOÿÞÈ&lt;,Wþ‡ÿ·ƒïüúCÿß%Ï$sŸÿÃÿ÷‡þåiò&gt;GÈù#ä|‘ò:#ä|Š":#¢:;ˆèŽˆèʤV‘ÑÑÑÑÑÑÑÑÑçIþ×o(¿zHDDDDDFp'.Ñ:ˆR:aAràÁ¬LˆÈù!ÿÿï[ÿ¯Äàiƒ"VƒDÇ)Ê6PáÈê$9C”9C†‡CD¡pE@¦œÖ{i~Úý¯kköDœ4ÉU”8`ƒt!l2G --End Attach-- </code></pre> <p>i try to read file with streamreader:</p> <pre><code>string[] lines = System.IO.File.ReadAllLines(@"C:\Users\Davide\Desktop\20041230000D.xmm") </code></pre> <p>I read line by line the file, and when line is equal "Content-Transfer-Encoding: binary; Length=220096", i read all following lines and write a "filename"(in this case 30085949.tif) file. But i'm reading strings, not byte data and result file is damaged (now i try with tiff file). Any suggestion for me?</p> <p><strong>SOLUTION</strong> Thanks for reply. I've adopted this solution: I builded a LineReader extend BinaryReader:</p> <pre><code> public class LineReader : BinaryReader { public LineReader(Stream stream, Encoding encoding) : base(stream, encoding) { } public int currentPos; private StringBuilder stringBuffer; public string ReadLine() { currentPos = 0; char[] buf = new char[1]; stringBuffer = new StringBuilder(); bool lineEndFound = false; while (base.Read(buf, 0, 1) &gt; 0) { currentPos++; if (buf[0] == Microsoft.VisualBasic.Strings.ChrW(10)) { lineEndFound = true; } else { stringBuffer.Append(buf[0]); } if (lineEndFound) { return stringBuffer.ToString(); } } return stringBuffer.ToString(); } } </code></pre> <p>Where <em>Microsoft.VisualBasic.Strings.ChrW(10)</em> is a Line Feed. When i parse my file:</p> <pre><code> using (LineReader b = new LineReader(File.OpenRead(path), Encoding.Default)) { int pos = 0; int length = (int)b.BaseStream.Length; while (pos &lt; length) { string line = b.ReadLine(); pos += (b.currentPos); if (!beginNextPart) { if (line.StartsWith(BEGINATTACH)) { beginNextPart = true; } } else { if (line.StartsWith(ENDATTACH)) { beginNextPart = false; } else { if (line.StartsWith("Content-Transfer-Encoding: binary; Length=")) { attachLength = Convert.ToInt32(line.Replace("Content-Transfer-Encoding: binary; Length=", "")); byte[] attachData = b.ReadBytes(attachLength); pos += (attachLength); ByteArrayToFile(@"C:\users\davide\desktop\files.tif", attachData); } } } } } </code></pre> <p>I read a byte length from file and i read following n bytes.</p>
 

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