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From: Ali on 3 Jan 2010 07:20
Hi, I need to extract the images (attached) of a .EML file.
Any help or ideas?
Thanks in advance.
(I'm programming in c#)


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Screenscrape Realtime Quotes with Regex and XML
http://www.eggheadcafe.com/tutorials/aspnet/a242f7bc-6dfb-465c-8ff0-6f63b4fbf718/screenscrape-realtime-quo.aspx
From: Asaf Shelly on 3 Jan 2010 10:49
Hi,

Try remaing the file from *.eml to *.mht (version of HTML that has all
resources inline in hex format)

Asaf
From: kndg on 3 Jan 2010 23:37
Ali Seraj wrote:
> Hi, I need to extract the images (attached) of a .EML file.
> Any help or ideas?
> Thanks in advance.
> (I'm programming in c#)
>
>
> Submitted via EggHeadCafe - Software Developer Portal of Choice
> Screenscrape Realtime Quotes with Regex and XML
> http://www.eggheadcafe.com/tutorials/aspnet/a242f7bc-6dfb-465c-8ff0-6f63b4fbf718/screenscrape-realtime-quo.aspx

Hi Ali,

Upon examination of eml file, it can be done quite easily.
Below is sample code (not tested/optimized)

using System;
using System.IO;
using System.Text;

public class AttachmentExtractor
{
static void Main(string[] args)
{
if (args.Length > 0)
{
string filename = args[0];

using (var reader = new StreamReader(filename))
{
string line;

while ((line = reader.ReadLine()) != null)
{
if (line.StartsWith("--MEboundary-"))
{
ParseMimeSegment(reader);
}
}
}
}
}

private static void ParseMimeSegment(TextReader reader)
{
string line;
string filename = String.Empty;

while ((line = reader.ReadLine()) != null)
{
if (String.IsNullOrEmpty(line)) break;
if (line.StartsWith("Content-Disposition: attachment;")) //
found attachment
{
int filenameStart = line.IndexOf('"') + 1;
filename = line.Substring(filenameStart, line.Length -
filenameStart - 1);
}
}

if (filename.Length > 0)
{
ExtractAttachment(reader, filename);
}
}

private static void ExtractAttachment(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());

using (Stream writer = new FileStream(filename,
FileMode.Create))
{
writer.Write(buffer, 0, buffer.Length);
}
}
}
}

Regards.
From: kndg on 4 Jan 2010 00:12
Hahaha... does not work.
Here is version 2.

using System;
using System.IO;
using System.Text;

public class AttachmentExtractor
{
static void Main(string[] args)
{
if (args.Length > 0)
{
string filename = args[0];

using (var reader = new StreamReader(filename))
{
string line;

while ((line = reader.ReadLine()) != null)
{
if (line.StartsWith("Content-Disposition:
attachment;")) // found attachment
{
if (!line.Contains("filename"))
{
line = reader.ReadLine(); // Thunderbird:
filename start at second line
}

int filenameStart = line.IndexOf('"') + 1;
filename = line.Substring(filenameStart,
line.Length - filenameStart - 1);

while ((line = reader.ReadLine()) != null)
{
if (String.IsNullOrEmpty(line)) break;
}

ExtractAttachment(reader, filename);
}
}
}
}
}

private static void ExtractAttachment(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());

using (Stream writer = new FileStream(filename,
FileMode.Create))
{
writer.Write(buffer, 0, buffer.Length);
}
}
}
}
From: kndg on 4 Jan 2010 01:40
Version 3: Support for embedded image

using System;
using System.IO;
using System.Text;

public class AttachmentExtractor
{
private static int imageCount;

static void Main(string[] args)
{
if (args.Length > 0)
{
StreamReader reader = null;

try
{
reader = new StreamReader(args[0]);
string line;

while ((line = reader.ReadLine()) != null)
{
if (line.ToLower().StartsWith("content-disposition:
attachment;")) // found attachment
{
ExtractContent(reader, GetAttachment(reader,
line));
}
if (line.ToLower().StartsWith("content-type:
image/")) // found embedded image
{
ExtractContent(reader, GetImage(reader, line));
}
}
}
catch (IOException)
{
Console.WriteLine("Unable to open file!");
}
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 GetFilename(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 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());

using (Stream writer = new FileStream(filename,
FileMode.Create))
{
writer.Write(buffer, 0, buffer.Length);
}
}
}
}

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