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Copy pathUploadReceiver.java
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Copy pathUploadReceiver.java
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327 lines (279 loc) · 10.9 KB
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package fineuploader;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.Arrays;
import java.util.regex.Pattern;
//commented code blocks are only used for CORS environments
public class UploadReceiver extends HttpServlet
{
private static final File UPLOAD_DIR = new File("test/uploads");
private static File TEMP_DIR = new File("test/uploadsTemp");
private static String CONTENT_LENGTH = "Content-Length";
private static int SUCCESS_RESPONSE_CODE = 200;
final Logger log = LoggerFactory.getLogger(UploadReceiver.class);
@Override
public void init() throws ServletException
{
UPLOAD_DIR.mkdirs();
}
@Override
public void doDelete(HttpServletRequest req, HttpServletResponse resp) throws IOException
{
String uuid = req.getPathInfo().replaceAll("/", "");
handleDeleteFileRequest(uuid, resp);
}
private void handleDeleteFileRequest(String uuid, HttpServletResponse resp) throws IOException
{
FileUtils.deleteDirectory(new File(UPLOAD_DIR, uuid));
if (new File(UPLOAD_DIR, uuid).exists())
{
log.warn("couldn't find or delete " + uuid);
}
else
{
log.info("deleted " + uuid);
}
resp.setStatus(SUCCESS_RESPONSE_CODE);
// resp.addHeader("Access-Control-Allow-Origin", "*");
}
@Override
public void doOptions(HttpServletRequest req, HttpServletResponse resp)
{
resp.setStatus(SUCCESS_RESPONSE_CODE);
resp.addHeader("Access-Control-Allow-Origin", "http://192.168.130.118:8080");
// resp.addHeader("Access-Control-Allow-Credentials", "true");
resp.addHeader("Access-Control-Allow-Methods", "POST, DELETE");
resp.addHeader("Access-Control-Allow-Headers", "x-requested-with, cache-control, content-type");
}
@Override
public void doPost(HttpServletRequest req, HttpServletResponse resp) throws IOException
{
RequestParser requestParser = null;
boolean isIframe = req.getHeader("X-Requested-With") == null || !req.getHeader("X-Requested-With").equals("XMLHttpRequest");
try
{
// resp.setContentType(isIframe ? "text/html" : "text/plain");
resp.setContentType("text/plain");
resp.setStatus(SUCCESS_RESPONSE_CODE);
// resp.addHeader("Access-Control-Allow-Origin", "http://192.168.130.118:8080");
// resp.addHeader("Access-Control-Allow-Credentials", "true");
// resp.addHeader("Access-Control-Allow-Origin", "*");
if (ServletFileUpload.isMultipartContent(req))
{
MultipartUploadParser multipartUploadParser = new MultipartUploadParser(req, TEMP_DIR, getServletContext());
requestParser = RequestParser.getInstance(req, multipartUploadParser);
writeFileForMultipartRequest(requestParser);
writeResponse(resp.getWriter(), requestParser.generateError() ? "Generated error" : null, isIframe, false, requestParser);
}
else
{
requestParser = RequestParser.getInstance(req, null);
//handle POST delete file request
if (requestParser.getMethod() != null
&& requestParser.getMethod().equalsIgnoreCase("DELETE"))
{
String uuid = requestParser.getUuid();
handleDeleteFileRequest(uuid, resp);
}
else
{
writeFileForNonMultipartRequest(req, requestParser);
writeResponse(resp.getWriter(), requestParser.generateError() ? "Generated error" : null, isIframe, false, requestParser);
}
}
} catch (Exception e)
{
log.error("Problem handling upload request", e);
if (e instanceof MergePartsException)
{
writeResponse(resp.getWriter(), e.getMessage(), isIframe, true, requestParser);
}
else
{
writeResponse(resp.getWriter(), e.getMessage(), isIframe, false, requestParser);
}
}
}
private void writeFileForNonMultipartRequest(HttpServletRequest req, RequestParser requestParser) throws Exception
{
File dir = new File(UPLOAD_DIR, requestParser.getUuid());
dir.mkdirs();
String contentLengthHeader = req.getHeader(CONTENT_LENGTH);
long expectedFileSize = Long.parseLong(contentLengthHeader);
if (requestParser.getPartIndex() >= 0)
{
writeFile(req.getInputStream(), new File(dir, requestParser.getUuid() + "_" + String.format("%05d", requestParser.getPartIndex())), null);
if (requestParser.getTotalParts()-1 == requestParser.getPartIndex())
{
File[] parts = getPartitionFiles(dir, requestParser.getUuid());
File outputFile = new File(dir, requestParser.getFilename());
for (File part : parts)
{
mergeFiles(outputFile, part);
}
assertCombinedFileIsVaid(requestParser.getTotalFileSize(), outputFile, requestParser.getUuid());
deletePartitionFiles(dir, requestParser.getUuid());
}
}
else
{
writeFile(req.getInputStream(), new File(dir, requestParser.getFilename()), expectedFileSize);
}
}
private void writeFileForMultipartRequest(RequestParser requestParser) throws Exception
{
File dir = new File(UPLOAD_DIR, requestParser.getUuid());
dir.mkdirs();
if (requestParser.getPartIndex() >= 0)
{
writeFile(requestParser.getUploadItem().getInputStream(), new File(dir, requestParser.getUuid() + "_" + String.format("%05d", requestParser.getPartIndex())), null);
if (requestParser.getTotalParts()-1 == requestParser.getPartIndex())
{
File[] parts = getPartitionFiles(dir, requestParser.getUuid());
File outputFile = new File(dir, requestParser.getOriginalFilename());
for (File part : parts)
{
mergeFiles(outputFile, part);
}
assertCombinedFileIsVaid(requestParser.getTotalFileSize(), outputFile, requestParser.getUuid());
deletePartitionFiles(dir, requestParser.getUuid());
}
}
else
{
writeFile(requestParser.getUploadItem().getInputStream(), new File(dir, requestParser.getFilename()), null);
}
}
private void assertCombinedFileIsVaid(long totalFileSize, File outputFile, String uuid) throws MergePartsException
{
if (totalFileSize != outputFile.length())
{
deletePartitionFiles(UPLOAD_DIR, uuid);
outputFile.delete();
throw new MergePartsException("Incorrect combined file size!");
}
}
private static class PartitionFilesFilter implements FilenameFilter
{
private String filename;
PartitionFilesFilter(String filename)
{
this.filename = filename;
}
@Override
public boolean accept(File file, String s)
{
return s.matches(Pattern.quote(filename) + "_\\d+");
}
}
private static File[] getPartitionFiles(File directory, String filename)
{
File[] files = directory.listFiles(new PartitionFilesFilter(filename));
Arrays.sort(files);
return files;
}
private static void deletePartitionFiles(File directory, String filename)
{
File[] partFiles = getPartitionFiles(directory, filename);
for (File partFile : partFiles)
{
partFile.delete();
}
}
private File mergeFiles(File outputFile, File partFile) throws IOException
{
FileOutputStream fos = new FileOutputStream(outputFile, true);
try
{
FileInputStream fis = new FileInputStream(partFile);
try
{
IOUtils.copy(fis, fos);
}
finally
{
IOUtils.closeQuietly(fis);
}
}
finally
{
IOUtils.closeQuietly(fos);
}
return outputFile;
}
private File writeFile(InputStream in, File out, Long expectedFileSize) throws IOException
{
FileOutputStream fos = null;
try
{
fos = new FileOutputStream(out);
IOUtils.copy(in, fos);
if (expectedFileSize != null)
{
Long bytesWrittenToDisk = out.length();
if (!expectedFileSize.equals(bytesWrittenToDisk))
{
log.warn("Expected file {} to be {} bytes; file on disk is {} bytes", new Object[] { out.getAbsolutePath(), expectedFileSize, 1 });
out.delete();
throw new IOException(String.format("Unexpected file size mismatch. Actual bytes %s. Expected bytes %s.", bytesWrittenToDisk, expectedFileSize));
}
}
return out;
}
catch (Exception e)
{
throw new IOException(e);
}
finally
{
IOUtils.closeQuietly(fos);
}
}
private void writeResponse(PrintWriter writer, String failureReason, boolean isIframe, boolean restartChunking, RequestParser requestParser)
{
if (failureReason == null)
{
// if (isIframe)
// {
// writer.print("{\"success\": true, \"uuid\": \"" + requestParser.getUuid() + "\"}<script src=\"http://192.168.130.118:8080/client/js/iframe.xss.response.js\"></script>");
// }
// else
// {
writer.print("{\"success\": true}");
// }
}
else
{
if (restartChunking)
{
writer.print("{\"error\": \"" + failureReason + "\", \"reset\": true}");
}
else
{
// if (isIframe)
// {
// writer.print("{\"error\": \"" + failureReason + "\", \"uuid\": \"" + requestParser.getUuid() + "\"}<script src=\"http://192.168.130.118:8080/client/js/iframe.xss.response.js\"></script>");
// }
// else
// {
writer.print("{\"error\": \"" + failureReason + "\"}");
// }
}
}
}
private class MergePartsException extends Exception
{
MergePartsException(String message)
{
super(message);
}
}
}