i have implemented a servlet to download doc files available under my application classpath.
what happening is; file is downloading but ms-word is unable to open it property.
see the screenshot of ms-word:
Servlet implementation is as follows:
public class DownloadFileServlet extends HttpServlet {
protected void doGet(
HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
String fileName = "test.doc";
ClassPathResource resource = new ClassPathResource(File.separator + fileName);
ServletOutputStream sos = null;
FileInputStream fis = null;
try {
response.setContentType("application/msword");
response.setHeader("Content-disposition", "attachment; fileName=\"" + fileName + "\"" );
fis = new FileInputStream(new File(resource.getURI().getPath()));
byte[] bytes = org.apache.commons.io.IOUtils.toByteArray(fis);
sos = response.getOutputStream();
sos.write(bytes);
sos.flush();
} catch (Exception e) {
e.printStackTrace();
} finally {
if( fis != null) {
fis.close();
}
if( sos != null) {
sos.close();
}
}
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}
i have tried almost all suggested Content Types for ms-word files. but still it is not working.
application/msword
application/ms-word
application/vnd.ms-word
Kindly suggest I'm making a mistake or is there any other way to achieve.
Note: i have tried almost all approaches available on SO.
Instead of reading, converting to byte[] simply write directly to the OutputStream. You shouldn't close the OutputStream as that is being handled by the container for you.
I would rewrite your servlet method to more or less the following (also why is it a servlet and not a (#)Controller?
protected void doGet(
HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
String fileName = "test.doc";
ClassPathResource resource = new ClassPathResource(File.separator + fileName);
InputStream input = resource.getInputStream();
try {
response.setContentType("application/msword");
response.setHeader("Content-disposition", "attachment; fileName=\"" + fileName + "\"" );
org.springframework.util.StreamUtils.copy(input, response.getOutputStream());
} catch (Exception e) {
e.printStackTrace();
} finally {
if (input != null) {
try {
input.close();
} catch (IOEXception ie) {}
}
}
}
i do not know what a ClassPathResource class does. hence modified the code a bit.
ClassLoader clsLoader = Thread.currentThread().getContextClassLoader();
InputStream is = clsLoader.getResourceAsStream("test.doc");
and in the try block use:
byte[] bytes = org.apache.commons.io.IOUtils.toByteArray(is);
this should work fine. i placed the doc in the classpath. modify it to suit your needs.
Regarding the mime mapping, open your server properties and you will find a list of mime mapping. Eg. in eclipse for tomcat, just double click on the server and you should be able to find the mime mapping list there. application/msword worked fine
Related
My servlet is showing this exception but the file exist at that location.
java.io.FileNotFoundException: ?E:\guru99\test.txt (The filename, directory name, or volume label syntax is incorrect)
Servlet Code,
#WebServlet(urlPatterns = {"/image_download"})
public class image_download extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String gurufile = "test.txt";
String gurupath = "E:\\guru99\\";
response.setContentType("APPLICATION/OCTET-STREAM");
response.setHeader("Content-Disposition", "attachment; filename=\"" + gurufile + "\"");
FileInputStream fileInputStream = new FileInputStream(gurupath + gurufile);
int i;
while ((i = fileInputStream.read()) != -1) {
out.write(i);
}
fileInputStream.close();
out.close();
}
/**
* #see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
}
I want to download the file from the link I provided.
Your issue is duplicate of this SO question
As when I tried to copy your code to my eclipse , I got same prompt about Save Problems. Somewhere there is an invalid character & string with that char can't be parsed into valid file path.
I manually retyped values for String gurufile & String gurupath instead of copy pasting your code & it worked successfully. Culprit seems String gurupath.
Second point is usage of try-with-resource ( though that has nothing to do with your issue ) instead of explicitly trying to close out resources,
response.setContentType("text/html");
String gurufile = "test.txt";
String gurupath = "D:\\guru99\\";
response.setContentType("APPLICATION/OCTET-STREAM");
response.setHeader("Content-Disposition", "attachment; filename=\"" + gurufile + "\"");
try (FileInputStream fileInputStream = new FileInputStream(gurupath + gurufile);
PrintWriter out = response.getWriter();) {
int i;
while ((i = fileInputStream.read()) != -1) {
out.write(i);
}
}
Copy - paste my code to see if this resolves your problem.
I have a web service app in Java and I'm trying to do an export functionality to export some data from the database to an excel file
For this I'm using HttpServletResponse, but even I set up a filename and a encoding type, the file exported is not using those.
I need to set up the name of the file with the corresponding export date and the encoding type to allow UTF-8 characters like á,ó,ñ, etc --> This was fixed, see Edit 1 below.
Below you have my code:
#RequestMapping(value = "/export", method = RequestMethod.GET)
public #ResponseBody
void export(HttpServletRequest request, HttpServletResponse r) {
Response response = new Response();
try {
response = service.export();
if(response.isSuccess()){
r.setHeader( "Content-Disposition","attachment; filename=export_20171216.xls");
r.setContentType("application/vnd.ms-excel");
r.setCharacterEncoding("UTF-8");
OutputStream out = r.getOutputStream();
byte[] buffer = new byte[4096];
int length;
while ((length = ((InputStream) response.getData()).read(buffer)) > 0){
out.write(buffer, 0, length);
}
out.flush();
out.close();
}
else{
r.sendError(801, response.toString());
}
} catch (Exception e) {
e.printStackTrace();;
}
}
As the result, I'm getting files with the name like 2ea4a24e-b0b4-4d50-9604-4fcdb3713b90.xls and inside the file words like: Número instead of Número
--- Edit 1
I fixed the stress vowels with the follwing code when creating the ByteArray
new ByteArrayInputStream(sb.toString().getBytes("ISO-8859-15"));
If I got your issue correctly you are trying to keep filenames with symbols that have to be encoded. According setHeaders method docs:
the header value If it contains octet string, it should be
* encoded according to RFC 2047
* (http://www.ietf.org/rfc/rfc2047.txt)
And more likely your input filenames are in ASCII that are octets. Try to use java.nio.charset.CharsetDecoder with appropriate decoding when you set header with your fancy symbols.
A bit more explanations: ISO-8859-15 is not Unicode format and any symbol above of it leads to encoding the whole string for HTTP attributes.
public static void sendResponse (InputStream inputData, String fileName, HttpServletResponse res)
throws IOException {
try {
String contenttype = new ConfigurableMimeFileTypeMap().getContentType(fileName);
res.reset();
res.setContentType(contenttype);
res.addHeader("Content-Disposition", String.format("attachment;filename=\"%s\"", name));
ByteStreams.copy(inputData, res.getOutputStream());
} catch (Exception e) {
throw new IOException(e);
}
}
Please try with this:-I have used this in my code it works..
Let me know if still problem perisists
public void downloadFile(String fileName, String paramName,
HttpServletResponse response) {
File fileToBeDownloaded = null;
InputStream fileInputStream = null;
ServletOutputStream servletOutputStream;
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
response.addHeader("Content-Disposition", "attachment; filename=" +
fileName);
servletOutputStream = response.getOutputStream();
IOUtil.copyCompletely(fileInputStream, servletOutputStream);
servletOutputStream.flush();
servletOutputStream.close();
}
I'm new to GWT and in my company i was asked to make some changes in one of our applications.
Currently the Program generates reports in .xls format. Now we want to change it to .xlsx
public class Download extends HttpServlet {
private static final long serialVersionUID = 5580666921970339383L;
#Override
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
#Override
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String filename = (String)request.getSession().getAttribute(CrossReportConstants.ATTR_FILENAME);
byte[] data = (byte[])request.getSession().getAttribute(CrossReportConstants.ATTR_REPORT);
request.getSession().setAttribute(CrossReportConstants.ATTR_FILENAME, null);
request.getSession().setAttribute(CrossReportConstants.ATTR_REPORT, null);
response.setContentType("application/vnd.ms-excel");
response.setHeader("Content-Disposition", "attachment;filename=" + filename);
response.setHeader("Pragma", "no-cache");
response.setHeader("Expires", "0");
response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
response.setContentLength(data.length);
try {
InputStream in = new ByteArrayInputStream(data);
ServletOutputStream out = response.getOutputStream();
byte[] outputByte = new byte[4096];
// copy binary contect to output stream
while (in.read(outputByte, 0, 4096) != -1) {
out.write(outputByte, 0, 4096);
}
in.close();
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
I changed response.setContentType("application/vnd.ms-excel"); to
response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
and I changed the filename to exampleReport.xlsx
When i test the Application i can download the report but i cannot open it - Excel tells me the file is corrupted. (the file has the right size and when i open it in a text editor i can see the content)
Did I miss something?
Thanks in advance
I have a JasperReports report generated via a Java web application. The application located at my localhost page: 8084/app/pages.jsp (where is the form that is sending to the servlet) generates the report perfectly, the problem occurred that when I generate the report served my site.com / app / pages.jsp got this result, it seems that the server does not interpret the file. pdf or her generation.
is a linux server running apache
This comes from an old project, you addresponse.setContentType("application/pdf"); and write as output the bytes of the file..
public class ReportSintesiServlet extends HttpServlet {
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("application/pdf");
Lookup<IReportGeneration> l = new Lookup<IReportGeneration>(true, IReportGeneration.class);
IReportGeneration g = null;
try {
g = l.lookup();
} catch (Exception ex) {
return;
}
if (g != null) {
String param = request.getParameter("idc");
System.out.println("genero il report per idc " + param);
Integer idc = Integer.parseInt(param);
byte[] doc = (byte[]) g.generaSintesiAccordoIniziale(idc);
if (doc != null) {
FilePathManager fpm = new FilePathManager();
String pathtofile = fpm.pathToNuovaSintesi(idc);
File temp = new File(pathtofile);
FileUtil.writeBytesToFile(temp, doc);
response.addHeader("Content-Disposition", "attachment; filename=" + temp.getName());
response.setContentLength((int) temp.length());
FileInputStream fileInputStream = new FileInputStream(temp);
OutputStream responseOutputStream = response.getOutputStream();
int bytes;
while ((bytes = fileInputStream.read()) != -1) {
responseOutputStream.write(bytes);
}
}
}
}
#Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
#Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
#Override
public String getServletInfo() {
return "Short description";
}
}
PS: I removed some pieces of code which was not helpful in this case, as you can see you miss all the part of the logic for error management.
I have a servlet which just read a file and send it to the browser.
The file is readen correctly, but on OutputStream.flush(), the browser receive no data.
Firefox says :
"Corrupted Content Error
The page you are trying to view cannot be shown because an error in the data transmission was detected.". Firebug shows the status "Aborted".
IE open or save an empty file.
I tried little or big files.
The code is :
/**
* Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
* #param request servlet request
* #param response servlet response
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// Use a ServletOutputStream because we may pass binary information
response.reset();
OutputStream out = response.getOutputStream();
// Get the file to view
String file = request.getParameter("path");
// Get and set the type and size of the file
String contentType = getServletContext().getMimeType(file);
response.setContentType(contentType);
long fileSize = (new File(file)).length();
response.setHeader("Content-Length:", "" + fileSize);
File f = new File(file);
response.setHeader("Content-Disposition", "attachment;filename="+f.getName());
response.setContentLength((int) fileSize);
// Return the file
try {
returnFile(file, out, response);
} catch (Exception e) {
Logger.getLogger(AffichageItemsServlet.class).error("", e);
} finally {
out.close();
}
}
// Send the contents of the file to the output stream
public static void returnFile(String filename, OutputStream out, HttpServletResponse resp)
throws FileNotFoundException, IOException {
FileInputStream fis = null;
try {
fis = new FileInputStream(filename);
byte[] buff = new byte[8* 1024];
int nbRead = 0;
while ((nbRead = fis.read(buff, 0, buff.length)) !=-1) {
out.write(buff, 0, nbRead);
}
out.flush();
} finally {
if (fis != null) {
fis.close();
}
}
}
The response is sent on "out.flush".
Any idea ?
For one thing, remove this line (you call setContentLength() below that):
response.setHeader("Content-Length:", "" + fileSize);
Also, you might try moving the getOutputStream() call to just before you start using the stream.