Java URL Connection isZipName(URI documentIRI, URLConnection connection)

Description

is Zip Name

License

Open Source License

Declaration

private static boolean isZipName(URI documentIRI, URLConnection connection) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.net.URI;
import java.net.URLConnection;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    private static final String ZIP_FILE_EXTENSION = ".zip";
    private static final String CONTENT_DISPOSITION_HEADER = "Content-Disposition";
    private static final Pattern CONTENT_DISPOSITION_FILE_NAME_PATTERN = Pattern
            .compile(".*filename=\"([^\\s;]*)\".*");
    private static final int CONTENT_DISPOSITION_FILE_NAME_PATTERN_GROUP = 1;

    private static boolean isZipName(URI documentIRI, URLConnection connection) {
        if (isZipFileName(documentIRI.toString())) {
            return true;
        } else {/* w w w . j  a va  2  s  . com*/
            String fileName = getFileNameFromContentDisposition(connection);
            return fileName != null && isZipFileName(fileName);
        }
    }

    private static boolean isZipFileName(String fileName) {
        return fileName.toLowerCase().endsWith(ZIP_FILE_EXTENSION);
    }

    private static String getFileNameFromContentDisposition(URLConnection connection) {
        String contentDispositionHeaderValue = connection.getHeaderField(CONTENT_DISPOSITION_HEADER);
        if (contentDispositionHeaderValue != null) {
            Matcher matcher = CONTENT_DISPOSITION_FILE_NAME_PATTERN.matcher(contentDispositionHeaderValue);
            if (matcher.matches()) {
                return matcher.group(CONTENT_DISPOSITION_FILE_NAME_PATTERN_GROUP);
            }
        }
        return null;
    }
}

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