* Web.csproj:

* TexToPdfFormatter.cs: Pdf formatter from Tex string

* FrontOfficeApiController.cs: html response in case of no document to
  produce at billing


* Estimate.aspx: renamed the Http methods returning tex and pdf
  estimates


* LocalizedText.Designer.cs: these files are generated from the .resx
  file

* LocalizedText.resx:
* LocalizedText.fr.resx: html response in case of no document to
  produce at billing

web/Formatters/TexToPdfFormatter.cs

@@ -0,0 +1,110 @@
+//
+//  TexToPdfFormatter.cs
+//
+//  Author:
+//       Paul Schneider <paulschneider@free.fr>
+//
+//  Copyright (c) 2015 Paul Schneider
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU Lesser General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU Lesser General Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser General Public License
+//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+using System;
+using System.Net.Http.Formatting;
+using System.Net.Http.Headers;
+using System.Collections.Generic;
+using System.IO;
+using System.Web;
+using System.Diagnostics;
+
+namespace Yavsc.Formatters
+{
+	public class TexToPdfFormatter: BufferedMediaTypeFormatter
+	{
+		/// <summary>
+		/// Initializes a new instance of the <see cref="Yavsc.Formatters.TexToPdfFormatter"/> class.
+		/// </summary>
+		public TexToPdfFormatter ()
+		{
+			SupportedMediaTypes.Add(new MediaTypeHeaderValue("text/pdf"));
+		}
+		/// <summary>
+		/// Determines whether this instance can read type the specified type.
+		/// </summary>
+		/// <returns><c>true</c> if this instance can read type the specified type; otherwise, <c>false</c>.</returns>
+		/// <param name="type">Type.</param>
+		public override bool CanReadType(Type type)
+		{
+			return false;
+		}
+		/// <summary>
+		/// Determines whether this instance can write type the specified type.
+		/// </summary>
+		/// <returns><c>true</c> if this instance can write type the specified type; otherwise, <c>false</c>.</returns>
+		/// <param name="type">Type.</param>
+		public override bool CanWriteType(System.Type type)
+		{
+			if (type == typeof(string))
+			{
+				return true;
+			}
+			else
+			{
+				Type enumerableType = typeof(IEnumerable<string>);
+				return enumerableType.IsAssignableFrom(type);
+			}
+		}
+		/// <summary>
+		/// Writes to stream.
+		/// </summary>
+		/// <param name="type">Type.</param>
+		/// <param name="value">Value.</param>
+		/// <param name="stream">Stream.</param>
+		/// <param name="contentHeaders">Content headers.</param>
+		public override void WriteToStream (Type type, object value, Stream stream, HttpContentHeaders contentHeaders)
+		{
+
+			string content = value as string;
+			string name = "tmpdoc-"+Guid.NewGuid().ToString();
+			string fullname = Path.Combine (
+				HttpRuntime.CodegenDir, name);
+			FileInfo fi = new FileInfo(fullname + ".tex");
+			FileInfo fo = new FileInfo(fullname + ".pdf");
+			using (StreamWriter sw = new StreamWriter (fi.FullName))
+			{
+				sw.Write (content);
+			}
+			using (Process p = new Process ()) {			
+				p.StartInfo.WorkingDirectory = HttpRuntime.CodegenDir;
+				p.StartInfo = new ProcessStartInfo ();
+				p.StartInfo.UseShellExecute = false;
+				p.StartInfo.FileName = "/usr/bin/texi2pdf";
+				p.StartInfo.Arguments = 
+					string.Format ("--batch --build-dir={2} -o {0} {1}",
+						fo.FullName,
+						fi.FullName,HttpRuntime.CodegenDir);
+				p.Start ();
+				p.WaitForExit ();
+				if (p.ExitCode != 0)
+					throw new Exception ("Pdf generation failed with exit code:" + p.ExitCode);
+			}
+
+			using (StreamReader sr = new StreamReader (fo.FullName)) {
+				byte[] buffer = File.ReadAllBytes (fo.FullName);
+				stream.Write(buffer,0,buffer.Length);
+			}
+			fi.Delete();
+			fo.Delete();
+		}
+
+	}
+}