org.ng200.openolympus.controller.solution.SolutionDownloadController.java Source code

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Here is the source code for org.ng200.openolympus.controller.solution.SolutionDownloadController.java

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/**
 * The MIT License
 * Copyright (c) 2014-2015 Nick Guletskii
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.ng200.openolympus.controller.solution;

import java.security.Principal;

import javax.servlet.http.HttpServletRequest;

import org.ng200.openolympus.Assertions;
import org.ng200.openolympus.SecurityExpressionConstants;
import org.ng200.openolympus.model.Role;
import org.ng200.openolympus.model.Solution;
import org.ng200.openolympus.services.SolutionService;
import org.ng200.openolympus.services.StorageService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.io.FileSystemResource;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping(value = "/solutionDownload")
public class SolutionDownloadController {

    @Autowired
    private SolutionService solutionService;

    @Autowired
    private StorageService storageService;

    @PreAuthorize(SecurityExpressionConstants.IS_ADMIN + SecurityExpressionConstants.OR + '('
            + SecurityExpressionConstants.IS_USER + SecurityExpressionConstants.AND
            + SecurityExpressionConstants.USER_IS_OWNER + SecurityExpressionConstants.AND
            + "@oolsec.isSolutionInCurrentContest(#solution)" + ')')
    @RequestMapping(method = RequestMethod.GET)
    public @ResponseBody ResponseEntity<FileSystemResource> solutionDownload(final HttpServletRequest request,
            final Model model, @RequestParam(value = "id") final Solution solution, final Principal principal) {
        if (principal == null || (!solution.getUser().getUsername().equals(principal.getName())
                && !request.isUserInRole(Role.SUPERUSER))) {
            throw new InsufficientAuthenticationException(
                    "You attempted to download a solution that doesn't belong to you!");
        }
        Assertions.resourceExists(solution);

        final HttpHeaders headers = new HttpHeaders();
        headers.setContentDispositionFormData("attachment",
                this.storageService.getSolutionFile(solution).getFileName().toString());
        return new ResponseEntity<FileSystemResource>(
                new FileSystemResource(this.storageService.getSolutionFile(solution).toFile()), headers,
                HttpStatus.OK);
    }
}