138 lines
4.2 KiB
C#
138 lines
4.2 KiB
C#
//
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// TexToPdfFormatter.cs
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//
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// Author:
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// Paul Schneider <paulschneider@free.fr>
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//
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// Copyright (c) 2015 Paul Schneider
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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using System;
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using System.Net.Http.Formatting;
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using System.Net.Http.Headers;
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using System.Collections.Generic;
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using System.IO;
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using System.Web;
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using System.Diagnostics;
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using System.Net.Http;
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using Yavsc.Helpers;
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namespace Yavsc.Formatters
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{
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/// <summary>
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/// Tex to pdf formatter.
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/// </summary>
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public class TexToPdfFormatter: BufferedMediaTypeFormatter
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="Yavsc.Formatters.TexToPdfFormatter"/> class.
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/// </summary>
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public TexToPdfFormatter ()
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{
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SupportedMediaTypes.Add(new MediaTypeHeaderValue("text/pdf"));
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}
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/// <summary>
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/// Determines whether this instance can read type the specified type.
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/// </summary>
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/// <returns><c>true</c> if this instance can read type the specified type; otherwise, <c>false</c>.</returns>
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/// <param name="type">Type.</param>
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public override bool CanReadType(Type type)
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{
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return false;
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}
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/// <summary>
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/// Determines whether this instance can write type the specified type.
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/// </summary>
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/// <returns><c>true</c> if this instance can write type the specified type; otherwise, <c>false</c>.</returns>
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/// <param name="type">Type.</param>
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public override bool CanWriteType(System.Type type)
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{
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if (type == typeof(string))
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{
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return true;
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}
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else
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{
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Type enumerableType = typeof(IEnumerable<string>);
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return enumerableType.IsAssignableFrom(type);
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}
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}
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/// <summary>
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/// Writes to stream.
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/// </summary>
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/// <param name="type">Type.</param>
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/// <param name="value">Value.</param>
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/// <param name="stream">Stream.</param>
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/// <param name="contentHeaders">Content headers.</param>
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///
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public override void WriteToStream (Type type, object value, Stream stream, HttpContent content)
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{
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string temp = Path.GetTempPath ();
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string cntStr = value as string;
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string name = "tmpdoc-"+Guid.NewGuid().ToString();
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string fullname = Path.Combine (temp, name);
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FileInfo fi = new FileInfo(fullname + ".tex");
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FileInfo fo = null;
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using (StreamWriter sw = new StreamWriter (fi.OpenWrite()))
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{
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sw.Write (cntStr);
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sw.Close ();
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}
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using (Process p = new Process ()) {
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Directory.SetCurrentDirectory (temp);
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p.StartInfo.WorkingDirectory = temp;
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p.StartInfo = new ProcessStartInfo ();
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p.StartInfo.UseShellExecute = false;
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p.StartInfo.FileName = "texi2pdf";
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p.StartInfo.Arguments =
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string.Format ("--batch {0}",
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fi.FullName);
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p.StartInfo.RedirectStandardOutput = true;
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p.StartInfo.RedirectStandardError = true;
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p.Start ();
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p.WaitForExit ();
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if (p.ExitCode != 0) {
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var ex = new FormatterException ("Pdf generation failed with exit code:" + p.ExitCode);
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ex.Output = p.StandardOutput.ReadToEnd ()+"\nCWD:"+temp;
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ex.Error = p.StandardError.ReadToEnd ();
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throw ex;
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}
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fo = new FileInfo(name + ".pdf");
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}
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byte[] buffer = File.ReadAllBytes (fo.Name);
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stream.Write(buffer,0,buffer.Length);
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if (content.Headers != null)
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SetFileName(content.Headers, value.GetHashCode ().ToString ());
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}
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/// <summary>
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/// Sets the name of the file.
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/// </summary>
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/// <param name="contentHeaders">Content headers.</param>
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/// <param name="basename">Basename.</param>
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public static void SetFileName(HttpContentHeaders contentHeaders, string basename) {
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contentHeaders.ContentDisposition = new ContentDispositionHeaderValue ("attachment") {
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FileName = "doc-" + basename + ".pdf"
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};
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}
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}
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}
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