Jersey2794ITCase.java

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package org.glassfish.jersey.tests.integration.jersey2794;

import java.io.IOException;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.file.Files;
import java.nio.file.Paths;

import javax.ws.rs.core.Application;

import org.glassfish.jersey.test.JerseyTest;
import org.glassfish.jersey.test.external.ExternalTestContainerFactory;
import org.glassfish.jersey.test.spi.TestContainerException;
import org.glassfish.jersey.test.spi.TestContainerFactory;

import org.junit.Test;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;

/**
 * JERSEY-2794 reproducer.
 *
 * @author Michal Gajdos
 */
public class Jersey2794ITCase extends JerseyTest {

    @Override
    protected Application configure() {
        return new Application();
    }

    @Override
    protected TestContainerFactory getTestContainerFactory() throws TestContainerException {
        return new ExternalTestContainerFactory();
    }

    @Test
    public void mimeTempFileRemoved() throws Exception {
        final String tempDir = System.getProperty("java.io.tmpdir");

        // Get number of matching MIME*tmp files (the number should be the same at the end of the test).
        final int expectedTempFiles = matchingTempFiles(tempDir);

        final URL url = new URL(getBaseUri().toString());
        final HttpURLConnection connection = (HttpURLConnection) url.openConnection();

        connection.setRequestMethod("PUT");
        connection.setRequestProperty("Accept", "text/plain");
        connection.setRequestProperty("Content-Type", "multipart/form-data; boundary=XXXX_YYYY");

        connection.setDoOutput(true);
        connection.connect();

        final OutputStream outputStream = connection.getOutputStream();
        outputStream.write("--XXXX_YYYY".getBytes());
        outputStream.write('\n');
        outputStream.write("Content-Type: text/plain".getBytes());
        outputStream.write('\n');
        outputStream.write("Content-Disposition: form-data; name=\"big-part\"".getBytes());
        outputStream.write('\n');
        outputStream.write('\n');

        // Send big chunk of data.
        for (int i = 0; i < 16 * 4096; i++) {
            outputStream.write('E');
            if (i % 1024 == 0) {
                outputStream.flush();
            }
        }

        // Do NOT send end of the MultiPart message to simulate the issue.

        // Get Response ...
        assertThat("Bad Request expected", connection.getResponseCode(), is(400));

        // Make sure that the Mimepull message and it's parts have been closed and temporary files deleted.
        assertThat("Temporary mimepull files were not deleted", matchingTempFiles(tempDir), is(expectedTempFiles));

        // ... Disconnect.
        connection.disconnect();
    }

    private int matchingTempFiles(final String tempDir) throws IOException {
        return (int) Files.walk(Paths.get(tempDir)).filter(path -> {
            final String name = path.getFileName().toString();
            return name.startsWith("MIME") && name.endsWith("tmp");
        }).count();
    }
}