Java Code Examples for javax.servlet.http.HttpServletRequest#getPart()

/**
 * Extracts the file payload from an HttpServletRequest, checks that the file extension
 * is supported and uploads the file to Google Cloud Storage.
 */
public String getImageUrl(HttpServletRequest req, HttpServletResponse resp,
                          final String bucket) throws IOException, ServletException {
  Part filePart = req.getPart("file");
  final String fileName = filePart.getSubmittedFileName();
  String imageUrl = req.getParameter("imageUrl");
  // Check extension of file
  if (fileName != null && !fileName.isEmpty() && fileName.contains(".")) {
    final String extension = fileName.substring(fileName.lastIndexOf('.') + 1);
    String[] allowedExt = {"jpg", "jpeg", "png", "gif"};
    for (String s : allowedExt) {
      if (extension.equals(s)) {
        return this.uploadFile(filePart, bucket);
      }
    }
    throw new ServletException("file must be an image");
  }
  return imageUrl;
}
 

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
        throws ServletException, IOException {
    req.setCharacterEncoding("UTF-8");

    if (req.getRequestURI().endsWith("parseParametersBeforeParseParts")) {
        req.getParameterNames();
    }

    req.getPart("part");

    resp.setContentType("text/plain");
    resp.setCharacterEncoding("UTF-8");

    resp.getWriter().println("Part " + req.getParameter("part"));
}
 

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
        throws ServletException, IOException {
    req.setCharacterEncoding("UTF-8");

    if (req.getRequestURI().endsWith("parseParametersBeforeParseParts")) {
        req.getParameterNames();
    }

    req.getPart("part");

    resp.setContentType("text/plain");
    resp.setCharacterEncoding("UTF-8");

    resp.getWriter().println("Part " + req.getParameter("part"));
}
 

@Override
public void doPost(HttpServletRequest req, HttpServletResponse resp)
    throws IOException, ServletException {
  final Part filePart = req.getPart("file");
  final String fileName = filePart.getSubmittedFileName();

  // Modify access list to allow all users with link to read file
  List<Acl> acls = new ArrayList<>();
  acls.add(Acl.of(Acl.User.ofAllUsers(), Acl.Role.READER));
  // the inputstream is closed by default, so we don't need to close it here
  Blob blob =
      storage.create(
          BlobInfo.newBuilder(BUCKET_NAME, fileName).setAcl(acls).build(),
          filePart.getInputStream());

  // return the public download link
  resp.getWriter().print(blob.getMediaLink());
}
 

/**
 * Extracts the file payload from an HttpServletRequest, checks that the file extension
 * is supported and uploads the file to Google Cloud Storage.
 */
public String getImageUrl(HttpServletRequest req, HttpServletResponse resp,
                          final String bucket) throws IOException, ServletException {
  Part filePart = req.getPart("file");
  final String fileName = filePart.getSubmittedFileName();
  String imageUrl = req.getParameter("imageUrl");
  // Check extension of file
  if (fileName != null && !fileName.isEmpty() && fileName.contains(".")) {
    final String extension = fileName.substring(fileName.lastIndexOf('.') + 1);
    String[] allowedExt = {"jpg", "jpeg", "png", "gif"};
    for (String s : allowedExt) {
      if (extension.equals(s)) {
        return this.uploadFile(filePart, bucket);
      }
    }
    throw new ServletException("file must be an image");
  }
  return imageUrl;
}
 

/**
 * Unify FileItem and Part instances behind one interface
 */
private WrappedUpload wrapUpload(HttpServletRequest request, String name) {

    FileItem item = (FileItem) request.getAttribute(name);
    if (item != null) {
        return new WrappedUpload(item);
    }

    try {
        Part part = request.getPart(name);
        if (part != null) return new WrappedUpload(part);
    } catch (Exception e) {
        log.error("Failed to get upload part from request. Null will be returned.", e);
    }
    return null;
}
 

/**
 * Extracts the file payload from an HttpServletRequest, checks that the file extension
 * is supported and uploads the file to Google Cloud Storage.
 */
public String getImageUrl(HttpServletRequest req, HttpServletResponse resp,
                          final String bucket) throws IOException, ServletException {
  Part filePart = req.getPart("file");
  final String fileName = filePart.getSubmittedFileName();
  String imageUrl = req.getParameter("imageUrl");
  // Check extension of file
  if (fileName != null && !fileName.isEmpty() && fileName.contains(".")) {
    final String extension = fileName.substring(fileName.lastIndexOf('.') + 1);
    String[] allowedExt = {"jpg", "jpeg", "png", "gif"};
    for (String s : allowedExt) {
      if (extension.equals(s)) {
        return this.uploadFile(filePart, bucket);
      }
    }
    throw new ServletException("file must be an image");
  }
  return imageUrl;
}
 

private static final boolean isCorrectMultipartFormDataContent(final HttpServletRequest request) {
	try {
		final Part part = request.getPart(UNSUBSCRIBE_PARAMETER_NAME);
		
		if(part == null) {
			if(LOGGER.isInfoEnabled()) {
				LOGGER.info(String.format("Multipart message does not contain parameter '%s'", UNSUBSCRIBE_PARAMETER_NAME));
			}
			
			return false;
		}
		
		return isCorrectParameterValue(part);
	} catch(final Exception e) {
		return false;
	}
}
 

public String multiPart(Request baseRequest, HttpServletRequest request, MultipartConfigElement config)
		throws Exception {

	HttpSession session = request.getSession(false);
	String user = (String) session.getAttribute("user");

	baseRequest.setAttribute(Request.__MULTIPART_CONFIG_ELEMENT, config);
	Collection<Part> parts = request.getParts();
	for (Part part : parts) {
		System.out.println("" + part.getName());
	}

	Part filePart = request.getPart("file");

	InputStream imageStream = filePart.getInputStream();
	byte[] resultBuff = new byte[0];
	byte[] buff = new byte[1024];
	int k = -1;
	while ((k = imageStream.read(buff, 0, buff.length)) > -1) {
		byte[] tbuff = new byte[resultBuff.length + k]; // temp buffer size
														// = bytes already
														// read + bytes last
														// read
		System.arraycopy(resultBuff, 0, tbuff, 0, resultBuff.length); // copy
																		// previous
																		// bytes
		System.arraycopy(buff, 0, tbuff, resultBuff.length, k); // copy
																// current
																// lot
		resultBuff = tbuff; // call the temp buffer as your result buff
	}

	Map response = new HashMap();
	return getString(response);

}
 

@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    Part p = request.getPart("file");
    System.out.println(p.getName());
    response.setStatus(HttpServletResponse.SC_CREATED);
    try (PrintWriter out = response.getWriter()) {
        out.print("OK");
    }
}
 

protected void doPost(HttpServletRequest request,
		HttpServletResponse response) throws ServletException, IOException {
	
       String servletPath = request.getServletPath() + "";
       if( servletPath.endsWith("/remote/upload") ) { // 远程上传，先校验令牌，通过则进行自动登录
       	Filter8APITokenCheck.checkAPIToken( request );
       }
	
       String script;
	try {
        Part part = request.getPart("file");
		script = doUpload(request, part); // 自定义输出到指定目录
		
	} catch (Exception _e) {
		Exception e = ExceptionConvertorFactory.getConvertor().convert(_e);
		ExceptionEncoder.printErrorMessage(_e);
		
		String errorMsg = "上传（导入）失败：" + e.getMessage();
		errorMsg = Pattern.compile("\t|\r|\n|\'").matcher(errorMsg).replaceAll(" "); // 剔除换行，以免alert不出来
		script = "parent.alert('" + errorMsg + "');";
	} 
	
	script = (String) EasyUtils.checkNull(script, "console.log('上传完成')");
	
	// 上传文件在一个独立的iframe里执行，完成后，输出一个html到该iframe，以触发提示脚本
	response.setContentType("text/html;charset=utf-8");
	response.getWriter().print("<html><script>" +script+ "</script></html>");
}
 

private static Part getPart(HttpServletRequest request, String name) {
	try {
		return request.getPart(name);
	} catch (Exception e) {
		return null;
	}
}
 

public static String checkAntiCsrfToken(HttpServletRequest request) throws IOException, ServletException
{
    if (request.getContentType() != null &&
        request.getContentType().toLowerCase().indexOf("multipart/form-data") > -1 &&
        request.getPart("anti-csrf-token") == null ||
        request.getParameter("anti-csrf-token") == null) {
        return "missing \"" + antiCsrfTokenName + "\" POST parameter";
    }

    // SECURITY TODO: Actually validate anti-CSRF token.
    return null;
}
 

@Override
public String handleRequest(HttpServletRequest request, BindingResult result, Wizard wizard) {
  ImportWizardUtil.validateImportWizard(wizard);
  ImportWizard importWizard = (ImportWizard) wizard;
  String dataImportOption = request.getParameter("data-option");

  try {
    File file = null;
    Part part = request.getPart("upload");
    if (part != null) {
      file = FileUploadUtils.saveToTempFolder(part);
    }

    if (file == null) {
      result.addError(new ObjectError("wizard", "No file selected"));
    } else {
      importWizard.setFile(file);

      RepositoryCollection repositoryCollection =
          getFileRepositoryCollectionFactory().createFileRepositoryCollection(file);
      ImportService importService =
          getImportServiceFactory().getImportService(file, repositoryCollection);

      importWizard.setSupportedMetadataActions(importService.getSupportedMetadataActions());
      importWizard.setSupportedDataActions(importService.getSupportedDataActions());
      importWizard.setMustChangeEntityName(importService.getMustChangeEntityName());
    }

  } catch (Exception e) {
    ImportWizardUtil.handleException(e, importWizard, result, LOG, dataImportOption);
  }

  return null;
}
 

protected String upload(HttpServletRequest request, StringManager smClient) {
    String message = "";

    try {
        while (true) {
            Part warPart = request.getPart("deployWar");
            if (warPart == null) {
                message = smClient.getString(
                        "htmlManagerServlet.deployUploadNoFile");
                break;
            }
            String filename =
                extractFilename(warPart.getHeader("Content-Disposition"));
            if (!filename.toLowerCase(Locale.ENGLISH).endsWith(".war")) {
                message = smClient.getString(
                        "htmlManagerServlet.deployUploadNotWar", filename);
                break;
            }
            // Get the filename if uploaded name includes a path
            if (filename.lastIndexOf('\\') >= 0) {
                filename =
                    filename.substring(filename.lastIndexOf('\\') + 1);
            }
            if (filename.lastIndexOf('/') >= 0) {
                filename =
                    filename.substring(filename.lastIndexOf('/') + 1);
            }

            // Identify the appBase of the owning Host of this Context
            // (if any)
            File file = new File(deployed, filename);
            if (file.exists()) {
                message = smClient.getString(
                        "htmlManagerServlet.deployUploadWarExists",
                        filename);
                break;
            }
            
            ContextName cn = new ContextName(filename, true);
            String name = cn.getName();

            if ((host.findChild(name) != null) && !isDeployed(name)) {
                message = smClient.getString(
                        "htmlManagerServlet.deployUploadInServerXml",
                        filename);
                break;
            }

            if (isServiced(name)) {
                message = smClient.getString("managerServlet.inService", name);
            } else {
                addServiced(name);
                try {
                    warPart.write(file.getAbsolutePath());
                    // Perform new deployment
                    check(name);
                } finally {
                    removeServiced(name);
                }
            }
            break;
        }
    } catch(Exception e) {
        message = smClient.getString
            ("htmlManagerServlet.deployUploadFail", e.getMessage());
        log(message, e);
    }
    return message;
}
 

public static Object resolvePart(HttpServletRequest servletRequest, String name) throws Exception {
	return servletRequest.getPart(name);
}
 

@Nullable
public static Object resolveMultipartArgument(String name, MethodParameter parameter, HttpServletRequest request)
		throws Exception {

	MultipartHttpServletRequest multipartRequest =
			WebUtils.getNativeRequest(request, MultipartHttpServletRequest.class);
	boolean isMultipart = (multipartRequest != null || isMultipartContent(request));

	if (MultipartFile.class == parameter.getNestedParameterType()) {
		if (multipartRequest == null && isMultipart) {
			multipartRequest = new StandardMultipartHttpServletRequest(request);
		}
		return (multipartRequest != null ? multipartRequest.getFile(name) : null);
	}
	else if (isMultipartFileCollection(parameter)) {
		if (multipartRequest == null && isMultipart) {
			multipartRequest = new StandardMultipartHttpServletRequest(request);
		}
		return (multipartRequest != null ? multipartRequest.getFiles(name) : null);
	}
	else if (isMultipartFileArray(parameter)) {
		if (multipartRequest == null && isMultipart) {
			multipartRequest = new StandardMultipartHttpServletRequest(request);
		}
		if (multipartRequest != null) {
			List<MultipartFile> multipartFiles = multipartRequest.getFiles(name);
			return multipartFiles.toArray(new MultipartFile[0]);
		}
		else {
			return null;
		}
	}
	else if (Part.class == parameter.getNestedParameterType()) {
		return (isMultipart ? request.getPart(name): null);
	}
	else if (isPartCollection(parameter)) {
		return (isMultipart ? resolvePartList(request, name) : null);
	}
	else if (isPartArray(parameter)) {
		return (isMultipart ? resolvePartList(request, name).toArray(new Part[0]) : null);
	}
	else {
		return UNRESOLVABLE;
	}
}
 

public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
	PageStats.page(request);
	request.setCharacterEncoding("utf-8");
	response.setCharacterEncoding("utf-8");
	
	LoginBean loginBean = (LoginBean)request.getSession().getAttribute("loginBean");
	if (loginBean == null) {
		response.sendRedirect("index.jsp");
		return;
	}
	BotBean botBean = loginBean.getBotBean();
	MemoryBean bean = loginBean.getBean(MemoryBean.class);
	try {
		String postToken = (String)request.getParameter("postToken");
		loginBean.verifyPostToken(postToken);
		String instance = (String)request.getParameter("instance");
		if (instance != null) {
			if (botBean.getInstance() == null || !String.valueOf(botBean.getInstanceId()).equals(instance)) {
				botBean.validateInstance(instance);
			}
		}
		if (!botBean.isConnected()) {
			request.getRequestDispatcher("memory.jsp").forward(request, response);
			return;
		}
		botBean.checkAdmin();
		String importFormat = (String)request.getParameter("import-format");
		String encoding = (String)request.getParameter("import-encoding");
		String pin = (String)request.getParameter("pin");
		Part filePart = request.getPart("file");
		if ((filePart != null) && (filePart.getSize() > 0)) {
			if (filePart.getContentType() != null && filePart.getContentType().equals("csv")) {
				importFormat = "csv";
			}
			String fileName = getFileName(filePart);
			InputStream stream = filePart.getInputStream();
			bean.importFile(fileName, stream, importFormat, encoding, "on".equals(pin));
		} else {
			throw new BotException("Missing file");
		}
		request.getRequestDispatcher("memory.jsp").forward(request, response);
	} catch (Exception failed) {
		botBean.error(failed);
		request.getRequestDispatcher("memory.jsp").forward(request, response);
	}
}
 

/**
 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
 *      response)
 */
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
	InputStream is = null;
	OutputStream os = null;
	try {
		Part part = null;
		try {
			part = request.getPart("file");
		} catch (Exception e) {
		}
		String contentType = null;
		int contentLength = -1;
		if (part == null) {
			is = request.getInputStream();
			contentType = request.getContentType();
			contentLength = request.getContentLength();
		} else {
			is = part.getInputStream();
			contentType = part.getContentType();
			contentLength = (int) part.getSize();
		}
		response.addHeader("Access-Control-Allow-Origin", "*");
		if (contentType != null) {
			response.setContentType(contentType);
		}
		if (contentLength > 0) {
			response.setContentLength(contentLength);
		}
		os = response.getOutputStream();
		byte data[] = new byte[4096];
		int len = 0;
		while ((len = is.read(data, 0, data.length)) > 0) {
			os.write(data, 0, len);
		}
		os.flush();
	} finally {
		if (is != null) {
			is.close();
		}
		if (os != null) {
			os.close();
		}
	}
}
 

protected String upload(HttpServletRequest request, StringManager smClient) {
    String message = "";

    try {
        while (true) {
            Part warPart = request.getPart("deployWar");
            if (warPart == null) {
                message = smClient.getString(
                        "htmlManagerServlet.deployUploadNoFile");
                break;
            }
            String filename = warPart.getSubmittedFileName();
            if (!filename.toLowerCase(Locale.ENGLISH).endsWith(".war")) {
                message = smClient.getString(
                        "htmlManagerServlet.deployUploadNotWar", filename);
                break;
            }
            // Get the filename if uploaded name includes a path
            if (filename.lastIndexOf('\\') >= 0) {
                filename =
                    filename.substring(filename.lastIndexOf('\\') + 1);
            }
            if (filename.lastIndexOf('/') >= 0) {
                filename =
                    filename.substring(filename.lastIndexOf('/') + 1);
            }

            // Identify the appBase of the owning Host of this Context
            // (if any)
            File file = new File(host.getAppBaseFile(), filename);
            if (file.exists()) {
                message = smClient.getString(
                        "htmlManagerServlet.deployUploadWarExists",
                        filename);
                break;
            }

            ContextName cn = new ContextName(filename, true);
            String name = cn.getName();

            if ((host.findChild(name) != null) && !isDeployed(name)) {
                message = smClient.getString(
                        "htmlManagerServlet.deployUploadInServerXml",
                        filename);
                break;
            }

            if (isServiced(name)) {
                message = smClient.getString("managerServlet.inService", name);
            } else {
                addServiced(name);
                try {
                    warPart.write(file.getAbsolutePath());
                    // Perform new deployment
                    check(name);
                } finally {
                    removeServiced(name);
                }
            }
            break;
        }
    } catch(Exception e) {
        message = smClient.getString
            ("htmlManagerServlet.deployUploadFail", e.getMessage());
        log(message, e);
    }
    return message;
}