@Override
public void service(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
String pathInfo = request.getPathInfo();
try {
// download.html
if (pathInfo != null && pathInfo.startsWith("/download.html")) {
// sending an HTML page helps debugging on IE, which often blocks or
// otherwise fails to download directly
String id = request.getParameter(ID_REQUEST_PARAM);
String filename = request.getParameter("filename");
String linkTarget =
"../download/"
+ (filename != null ? filename : "polymap3_export.tmp")
+ "?"
+ ID_REQUEST_PARAM
+ "="
+ id;
response.setContentType("text/html; charset=ISO-8859-1");
PrintWriter out = response.getWriter();
out.println("<html><head>");
out.println("<meta HTTP-EQUIV=\"REFRESH\" content=\"0; url=" + linkTarget + "\">");
out.println("</head>");
out.println("<a href=\"" + linkTarget + "\">Download starten</a>");
out.println("</html>");
out.flush();
}
// download
else {
String id = request.getParameter(ID_REQUEST_PARAM);
log.info("Request: id=" + id);
if (id == null) {
log.warn("No 'id' param in request.");
response.sendError(404);
return;
}
ContentProvider provider = providers.get(id);
if (provider == null) {
log.warn("No content provider registered for id: " + id);
response.sendError(404);
return;
}
// String[] pathInfos = StringUtils.split( request.getPathInfo(), "/" );
String contentType = provider.getContentType();
response.setContentType(contentType);
// display any HTML content in browser instead of downloading it
if (contentType != null && !contentType.toLowerCase().contains("html")) {
response.setHeader(
"Content-disposition", "attachment; filename=" + provider.getFilename());
}
response.setHeader("Pragma", "public");
response.setHeader("Cache-Control", "must-revalidate, post-check=0, pre-check=0");
response.setHeader("Cache-Control", "public");
response.setHeader("Expires", "0");
InputStream in = provider.getInputStream();
ServletOutputStream out = response.getOutputStream();
boolean providerDone = false;
try {
IOUtils.copy(in, out);
out.flush();
response.flushBuffer();
providerDone = provider.done(true);
} catch (Exception e) {
providerDone = provider.done(false);
} finally {
IOUtils.closeQuietly(in);
}
if (providerDone) {
providers.remove(id);
}
}
} catch (Exception e) {
log.debug("", e);
throw new ServletException(e);
}
}
