public void ProcessRequest(HttpContext context)
{
HttpRequest request = context.Request;
HttpResponse response = context.Response;
//if (Logger.Enabled) Logger.Write("{0} {1} - {2} => {3}", request.HttpMethod,
// request.Path, request.UserHostAddress, request.UserAgent);
string documentRoot = WebConfigurationManager.AppSettings["documentRoot"];
if (!Path.IsPathRooted(documentRoot))
{
documentRoot = Path.GetFullPath(context.Server.MapPath("..") + documentRoot);
}
if (!documentRoot.EndsWith(@"\"))
{
documentRoot += @"\";
}
string outputPath = WebConfigurationManager.AppSettings["outputPath"];
if (!Path.IsPathRooted(outputPath))
{
outputPath = Path.GetFullPath(context.Server.MapPath("..") + outputPath);
}
if (!outputPath.EndsWith(@"\"))
{
outputPath += @"\";
}
try
{
int n = request.Path.IndexOf("/pages/");
n += 7;
string f_id = request.Path.Substring(n);
string s_id = f_id.ToLower();
if (s_id.EndsWith(".pdf"))
{
s_id = s_id.Substring(0, s_id.Length - 4);
}
if (s_id.StartsWith("f"))
{
s_id = s_id.Substring(1);
}
f_id = String.Format("F{0:D7}", Int32.Parse(s_id));
bool fullpdf = false;
string pdf = documentRoot;
pdf += f_id;
if (!pdf.ToLower().EndsWith(".pdf"))
{
pdf += ".pdf";
}
else
{
fullpdf = true;
}
FileInfo pdfInf = new FileInfo(pdf);
if (!pdfInf.Exists)
{
if (Logger.Enabled)
{
Logger.Write("file {0} not found", pdf);
}
response.StatusCode = 404;
response.StatusDescription = "Not Found";
response.BinaryWrite(File.ReadAllBytes(context.Server.MapPath(".") + "images/404.gif"));
response.Flush();
return;
}
if (fullpdf)
{
if (Logger.Enabled)
{
Logger.Write("requested full pdf {0} ...", pdf);
}
response.ContentType = "application/pdf";
response.BinaryWrite(File.ReadAllBytes(pdfInf.FullName));
response.Flush();
return;
}
int page = -1;
string requestPage = Tools.GetRequestParameter(request, "page");
if (requestPage != null)
{
Int32.TryParse(requestPage, out page);
}
if (page <= 0)
{
throw new Exception(
"bad request page not specified or page non positive integer");
}
string outfile = outputPath;
outfile += (Int32.Parse(
f_id.Substring(5).TrimStart('0'))
% 256)
.ToString("X2")
.ToUpper();
DirectoryInfo outdir = new DirectoryInfo(outfile);
if (!outdir.Exists)
{
try
{
Directory.CreateDirectory(outdir.FullName);
}
catch (Exception e)
{
Logger.Write("Error: web app does not have wrtie access rigth to {0}, " +
"please modify directory permissions to make directory writable " +
"from this Application Pool - details: {1}", outdir, e);
response.StatusCode = 403;
response.StatusDescription = "Forbidden";
response.BinaryWrite(File.ReadAllBytes(context.Server.MapPath(".") + "images/404.gif"));
response.Flush();
return;
}
}
string ext = Tools.GetRequestParameter(request, "gsext", "png");
if (ext.StartsWith("."))
{
ext = ext.Substring(1);
}
string command = Tools.GetRequestParameter(request, "gsopts", "-version");
if (ext.Length > 4 || command.Length < 20 || command.IndexOf("-sDEVICE") < 0)
{
throw new Exception("invalid ghostscript command: " + command);
}
int timeout = -1;
string requestTimeout = Tools.GetRequestParameter(request, "timeout", null);
if (requestTimeout != null)
{
int.TryParse(requestTimeout, out timeout);
}
outfile += @"\";
outfile += f_id + "[" + page + "]." + ext;
bool nocache = Tools.GetRequestParameter(request, "timeout", "false")
.ToLower().Equals("true");
bool cached = false;
if (!nocache)
{
FileInfo f = new FileInfo(outfile);
cached = (f.Exists ? (
(f.LastWriteTime.ToFileTime() > pdfInf.LastWriteTime.ToFileTime())
) : false);
}
if (!cached)
{
DateTime start = DateTime.Now;
GhostscriptWrapper wrapper = new GhostscriptWrapper();
if (WebConfigurationManager.AppSettings["gsPath"] != null)
{
wrapper.ExecutablePath = WebConfigurationManager.AppSettings["gsPath"];
}
if (!wrapper.ConvertPage(command, pdf, outfile, timeout))
{
if (wrapper.IsGhostscriptInstalled)
{
if (Logger.Enabled)
{
Logger.Write(
"error: conversion failure from {0} to {1}[{2}]",
pdf, outfile, page);
}
response.StatusCode = 500;
response.StatusDescription = "Server Error";
response.BinaryWrite(File.ReadAllBytes(context.Server.MapPath(".") + "images/404.gif"));
response.Flush();
}
else
{
if (Logger.Enabled)
{
Logger.Write("error: conversion unavailable from {0} to {1}[{2}] - "
+ "GHOSTSCRIPT NOT INSTALLED OR NOT SET IN SYSTEM PATH!",
pdf, outfile, page);
}
response.StatusCode = 503;
response.StatusDescription = "Service Unavailable";
response.BinaryWrite(File.ReadAllBytes(context.Server.MapPath(".") + "images/404.gif"));
response.Flush();
}
return;
}
else
{
if (Logger.Enabled)
{
Logger.Write(
"HTTP /pages conversion from {0} ({1}Kb) to {2} ({3}Kb) in {4:F2}\"",
Path.GetFileName(pdf), (new FileInfo(pdf).Length / 1024),
Path.GetFileName(outfile), (new FileInfo(outfile).Length / 1024),
(((TimeSpan)(DateTime.Now - start)).TotalMilliseconds / 1000));
}
}
}
response.ContentType = "image/" + ext;
response.BinaryWrite(File.ReadAllBytes(outfile));
response.StatusCode = 200;
response.Flush();
}
catch
{
try
{
response.ContentType = "image/gif";
response.BinaryWrite(File.ReadAllBytes(context.Server.MapPath(".") + "images/404.gif"));
response.StatusCode = 404;
response.StatusDescription = "Not found";
response.Flush();
}
catch
{
try
{
response.StatusCode = 500;
response.StatusDescription = "Server Error";
response.Flush();
}
catch
{
if (Logger.Enabled)
{
Logger.Write("error flushing response! clent disconnected?");
}
}
}
}
}
public void ProcessRequest(HttpContext context)
{
HttpRequest request = context.Request;
HttpResponse response = context.Response;
//if (Logger.Enabled) Logger.Write("{0} {1} - {2} => {3}", request.HttpMethod,
// request.Path, request.UserHostAddress, request.UserAgent);
string documentRoot = WebConfigurationManager.AppSettings["documentRoot"];
if (!Path.IsPathRooted(documentRoot))
documentRoot = Path.GetFullPath(context.Server.MapPath("..") + documentRoot);
if (!documentRoot.EndsWith(@"\")) documentRoot += @"\";
string outputPath = WebConfigurationManager.AppSettings["outputPath"];
if (!Path.IsPathRooted(outputPath))
outputPath = Path.GetFullPath(context.Server.MapPath("..") + outputPath);
if (!outputPath.EndsWith(@"\")) outputPath += @"\";
try
{
int n = request.Path.IndexOf("/pages/");
n += 7;
string f_id = request.Path.Substring(n);
string s_id = f_id.ToLower();
if (s_id.EndsWith(".pdf")) s_id = s_id.Substring(0, s_id.Length - 4);
if (s_id.StartsWith("f")) s_id = s_id.Substring(1);
f_id = String.Format("F{0:D7}", Int32.Parse(s_id));
bool fullpdf = false;
string pdf = documentRoot;
pdf += f_id;
if (!pdf.ToLower().EndsWith(".pdf"))
{
pdf += ".pdf";
}
else
{
fullpdf = true;
}
FileInfo pdfInf = new FileInfo(pdf);
if (!pdfInf.Exists)
{
if (Logger.Enabled) Logger.Write("file {0} not found", pdf);
response.StatusCode = 404;
response.StatusDescription = "Not Found";
response.BinaryWrite(File.ReadAllBytes(context.Server.MapPath(".") + "images/404.gif"));
response.Flush();
return;
}
if (fullpdf)
{
if (Logger.Enabled) Logger.Write("requested full pdf {0} ...", pdf);
response.ContentType = "application/pdf";
response.BinaryWrite(File.ReadAllBytes(pdfInf.FullName));
response.Flush();
return;
}
int page = -1;
string requestPage = Tools.GetRequestParameter(request, "page");
if (requestPage != null) Int32.TryParse(requestPage, out page);
if (page <= 0)
throw new Exception(
"bad request page not specified or page non positive integer");
string outfile = outputPath;
outfile += (Int32.Parse(
f_id.Substring(5).TrimStart('0'))
% 256)
.ToString("X2")
.ToUpper();
DirectoryInfo outdir = new DirectoryInfo(outfile);
if (!outdir.Exists)
{
try
{
Directory.CreateDirectory(outdir.FullName);
}
catch (Exception e)
{
Logger.Write("Error: web app does not have wrtie access rigth to {0}, " +
"please modify directory permissions to make directory writable " +
"from this Application Pool - details: {1}", outdir, e);
response.StatusCode = 403;
response.StatusDescription = "Forbidden";
response.BinaryWrite(File.ReadAllBytes(context.Server.MapPath(".") + "images/404.gif"));
response.Flush();
return;
}
}
string ext = Tools.GetRequestParameter(request, "gsext", "png");
if (ext.StartsWith(".")) ext = ext.Substring(1);
string command = Tools.GetRequestParameter(request, "gsopts", "-version");
if (ext.Length > 4 || command.Length < 20 || command.IndexOf("-sDEVICE") < 0)
throw new Exception ("invalid ghostscript command: " + command);
int timeout = -1;
string requestTimeout = Tools.GetRequestParameter(request, "timeout", null);
if (requestTimeout != null) int.TryParse(requestTimeout, out timeout);
outfile += @"\";
outfile += f_id + "[" + page + "]." + ext;
bool nocache = Tools.GetRequestParameter(request, "timeout", "false")
.ToLower().Equals("true");
bool cached = false;
if (!nocache)
{
FileInfo f = new FileInfo(outfile);
cached = (f.Exists ? (
(f.LastWriteTime.ToFileTime() > pdfInf.LastWriteTime.ToFileTime())
) : false);
}
if (!cached)
{
DateTime start = DateTime.Now;
GhostscriptWrapper wrapper = new GhostscriptWrapper();
if (WebConfigurationManager.AppSettings["gsPath"] != null)
{
wrapper.ExecutablePath = WebConfigurationManager.AppSettings["gsPath"];
}
if (!wrapper.ConvertPage(command, pdf, outfile, timeout))
{
if (wrapper.IsGhostscriptInstalled)
{
if (Logger.Enabled)
Logger.Write(
"error: conversion failure from {0} to {1}[{2}]",
pdf, outfile, page);
response.StatusCode = 500;
response.StatusDescription = "Server Error";
response.BinaryWrite(File.ReadAllBytes(context.Server.MapPath(".") + "images/404.gif"));
response.Flush();
}
else
{
if (Logger.Enabled) Logger.Write("error: conversion unavailable from {0} to {1}[{2}] - "
+ "GHOSTSCRIPT NOT INSTALLED OR NOT SET IN SYSTEM PATH!",
pdf, outfile, page);
response.StatusCode = 503;
response.StatusDescription = "Service Unavailable";
response.BinaryWrite(File.ReadAllBytes(context.Server.MapPath(".") + "images/404.gif"));
response.Flush();
}
return;
}
else
{
if (Logger.Enabled)
Logger.Write(
"HTTP /pages conversion from {0} ({1}Kb) to {2} ({3}Kb) in {4:F2}\"",
Path.GetFileName(pdf), (new FileInfo(pdf).Length / 1024),
Path.GetFileName(outfile), (new FileInfo(outfile).Length / 1024),
(((TimeSpan)(DateTime.Now - start)).TotalMilliseconds / 1000));
}
}
response.ContentType = "image/" + ext;
response.BinaryWrite(File.ReadAllBytes(outfile));
response.StatusCode = 200;
response.Flush();
}
catch
{
try
{
response.ContentType = "image/gif";
response.BinaryWrite(File.ReadAllBytes(context.Server.MapPath(".") + "images/404.gif"));
response.StatusCode = 404;
response.StatusDescription = "Not found";
response.Flush();
}
catch
{
try
{
response.StatusCode = 500;
response.StatusDescription = "Server Error";
response.Flush();
}
catch
{
if (Logger.Enabled)
Logger.Write("error flushing response! clent disconnected?");
}
}
}
}
