private static List <string> BuildArgs(string source, string desc, PdfSettings settings)
{
var args = new List <string>();
//NOTE: header and footers cannot be suppered using header-html
// until wkhtmltopdf is patched :(
//if( has_header) args.Add("--header-html " + header);
//if (has_footer) args.Add("--footer-html " + footer);
args.Add("--page-height " + settings.PageHeight + "in");
args.Add("--page-width " + settings.PageWidth + "in");
//if (settings.PageSize != null) args.Add("--page-size " + settings.PageSize);
if (settings.EnableSocksJsAndCss)
{
args.Add("--margin-left 0");
args.Add("--margin-right 0");
args.Add("--margin-top 0");
args.Add("--margin-bottom 0");
}
else
{
args.Add("--margin-left " + settings.MarginLeft);
args.Add("--margin-right " + settings.MarginRight);
args.Add("--margin-top " + settings.MarginTop);
args.Add("--margin-bottom " + settings.MarginBottom);
}
if (settings.Landscape)
{
args.Add("--orientation Landscape");
}
args.Add(source);
args.Add(desc);
return(args);
}
private static string IncludeSockStyles(string html, PdfSettings settings)
{
if (!settings.EnableSocksJsAndCss)
{
return(html);
}
Match match = null;
var rx = new Regex(@"< *head *>", RegexOptions.IgnoreCase | RegexOptions.ECMAScript);
match = rx.Match(html);
if (match.Success)
{
var path = tools_path() + "socks.css";
var content = "<style>" + File.ReadAllText(path) + "</style>";
html = html.Replace(match.ToString(), match.ToString() + content);
}
return(html);
}
private static string InlineCss(string html, PdfSettings settings)
{
Match match = null;
var rx = new Regex(@"<link[^>]*href=[""']([^h][^t][^t][^p][^""']*.css)[^""']*[""'][^>]*((/>)|(>\s*</link>))", RegexOptions.IgnoreCase | RegexOptions.ECMAScript);
match = rx.Match(html);
while (match.Success)
{
var source = match.Groups[1].ToString();
source = settings.FixCssPath(source);
var path = HttpContext.Current.Server.MapPath(source);
try
{
var content = File.ReadAllText(path);
html = html.Replace(match.ToString(), string.Format(@"<style>{0}</style>", content));
}
catch
{ return(html); }
}
return(html);
}
private static string IncludeSockJavascript(string html, PdfSettings settings)
{
string pdf_settings = new JavaScriptSerializer().Serialize(settings);
var path = tools_path() + "jquery-1.11.0.min.js";
var content = "<script type='text/javascript'>";
content += File.ReadAllText(path) + "</script>";
html += content;
if (!settings.EnableSocksJsAndCss)
{
return(html);
}
path = tools_path() + "socks.js";
content = "<script type='text/javascript'>";
content += "var pdf_settings=" + pdf_settings + ";";
content += File.ReadAllText(path) + "</script>";
return(html + content);
}
//calls the lib to do the convert
public static Stream toPdf(string html, PdfSettings settings)
{
var temp = Path.GetTempFileName();
var source = temp + ".html";
var desc = temp + ".pdf";
try
{
File.WriteAllText(source, html);
var args = BuildArgs(source, desc, settings);
ProcessStartInfo psi = new ProcessStartInfo(tools_path() + "wkhtmltopdf.exe", string.Join(" ", args))
{
CreateNoWindow = true,
WindowStyle = ProcessWindowStyle.Hidden,
UseShellExecute = false,
RedirectStandardOutput = true
};
Process process = Process.Start(psi);
process.WaitForExit();
return(new MemoryStream(File.ReadAllBytes(desc)));
}
finally
{
if (File.Exists(source))
{
File.Delete(source);
}
if (File.Exists(desc))
{
File.Delete(desc);
}
}
}
public static string RenderViewToString(System.Web.Mvc.Controller controller, string partialPath, object model, PdfSettings settings)
{
if (string.IsNullOrEmpty(partialPath))
{
partialPath = controller.ControllerContext.RouteData.GetRequiredString("action");
}
controller.ViewData.Model = model;
using (StringWriter sw = new StringWriter())
{
string layoutPath = settings.MasterPage ?? GetLayout(controller, partialPath);
var viewResult = ViewEngines.Engines.FindView(controller.ControllerContext, partialPath, layoutPath);
if (viewResult.View == null)
{
var message = "could not find view:\n" + string.Join("\n", viewResult.SearchedLocations);
throw new Exception(message);
}
ViewContext viewContext = new ViewContext(controller.ControllerContext, viewResult.View, controller.ViewData, controller.TempData, sw);
foreach (var item in viewContext.Controller.ViewData.ModelState)
{
if (!viewContext.ViewData.ModelState.Keys.Contains(item.Key))
{
viewContext.ViewData.ModelState.Add(item);
}
}
viewResult.View.Render(viewContext, sw);
var html = sw.GetStringBuilder().ToString();
html = InlineCss(html, settings);
html = InlineJs(html);
html = InlineImg(html);
html = IncludeSockStyles(html, settings);
html = IncludeSockJavascript(html, settings);
html = html.Replace("{{page}}", @"<span data-pdf='current_page'></span>");
html = html.Replace("{{pages}}", @"<span data-pdf='total_page'></span>");
return(html);
}
}
