smartupload.java

此源代码是基于COM和ADO的数据库编程

// File Upload Programme.
// Use by 周四阳,2002.09.08

package upload;

import java.io.*;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Vector;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.PageContext;


public class SmartUpload
{

    public SmartUpload()
    {
        m_totalBytes = 0;
        m_currentIndex = 0;
        m_startData = 0;
        m_endData = 0;
        m_boundary = new String();
        m_totalMaxFileSize = 0L;
        m_maxFileSize = 0L;
        m_deniedFilesList = new Vector();
        m_allowedFilesList = new Vector();
        m_denyPhysicalPath = false;
        m_forcePhysicalPath = false;
        m_contentDisposition = new String();
        m_files = new Files();
        m_formRequest = new Request();
    }

    public final void init(ServletConfig config)
        throws ServletException
    {
        m_application = config.getServletContext();
    }

    public void service(HttpServletRequest request, HttpServletResponse response)
        throws IOException, ServletException
    {
        m_request = request;
        m_response = response;
    }

    public final void initialize(ServletConfig config, HttpServletRequest request, HttpServletResponse response)
        throws ServletException
    {
        m_application = config.getServletContext();
        m_request = request;
        m_response = response;
    }

    public final void initialize(PageContext pageContext)
        throws ServletException
    {
        m_application = pageContext.getServletContext();
        m_request = (HttpServletRequest)pageContext.getRequest();
        m_response = (HttpServletResponse)pageContext.getResponse();
    }

    public final void initialize(ServletContext application, HttpSession session, HttpServletRequest request, HttpServletResponse response, JspWriter out)
        throws ServletException
    {
        m_application = application;
        m_request = request;
        m_response = response;
    }

    // 文件上传
    public void upload()
        throws SmartUploadException, IOException, ServletException
    {
        int totalRead = 0;
        int readBytes = 0;
        long totalFileSize = 0L;
        boolean found = false;
        String dataHeader = new String();
        String fieldName = new String();
        String fileName = new String();
        String fileExt = new String();
        String filePathName = new String();
        String contentType = new String();
        String contentDisp = new String();
        String typeMIME = new String();
        String subTypeMIME = new String();
        boolean isFile = false;
        m_totalBytes = m_request.getContentLength();
        m_binArray = new byte[m_totalBytes];
        for(; totalRead < m_totalBytes; totalRead += readBytes)
            try
            {
                m_request.getInputStream();
                readBytes = m_request.getInputStream().read(m_binArray, totalRead, m_totalBytes - totalRead);
            }
            catch(Exception e)
            {
                throw new SmartUploadException("Unable to upload.");
            }

        for(; !found && m_currentIndex < m_totalBytes; m_currentIndex++)
            if(m_binArray[m_currentIndex] == 13)
                found = true;
            else
                m_boundary = m_boundary + (char)m_binArray[m_currentIndex];

        if(m_currentIndex == 1)
            return;
        m_currentIndex++;
        do
        {
            if(m_currentIndex >= m_totalBytes)
                break;
            dataHeader = getDataHeader();
            m_currentIndex = m_currentIndex + 2;
            isFile = dataHeader.indexOf("filename") > 0;
            fieldName = getDataFieldValue(dataHeader, "name");
            if(isFile)
            {
                filePathName = getDataFieldValue(dataHeader, "filename");
                fileName = getFileName(filePathName);
                fileExt = getFileExt(fileName);
                contentType = getContentType(dataHeader);
                contentDisp = getContentDisp(dataHeader);
                typeMIME = getTypeMIME(contentType);
                subTypeMIME = getSubTypeMIME(contentType);
            }
            getDataSection();
            if(isFile && fileName.length() > 0)
            {
                if(m_deniedFilesList.contains(fileExt))
                    throw new SecurityException("The extension of the file is denied to be uploaded (1015).");
                if(!m_allowedFilesList.isEmpty() && !m_allowedFilesList.contains(fileExt))
                    throw new SecurityException("The extension of the file is not allowed to be uploaded (1010).");
                if(m_maxFileSize > (long)0 && (long)((m_endData - m_startData) + 1) > m_maxFileSize)
                    throw new SecurityException(String.valueOf((new StringBuffer("Size exceeded for this file : ")).append(fileName).append(" (1105).")));
                totalFileSize += (m_endData - m_startData) + 1;
                if(m_totalMaxFileSize > (long)0 && totalFileSize > m_totalMaxFileSize)
                    throw new SecurityException("Total File Size exceeded (1110).");
            }
            if(isFile)
            {
                com.jspsmart.upload.File newFile = new com.jspsmart.upload.File();
                newFile.setParent(this);
                newFile.setFieldName(fieldName);
                newFile.setFileName(fileName);
                newFile.setFileExt(fileExt);
                newFile.setFilePathName(filePathName);
                newFile.setIsMissing(filePathName.length() == 0);
                newFile.setContentType(contentType);
                newFile.setContentDisp(contentDisp);
                newFile.setTypeMIME(typeMIME);
                newFile.setSubTypeMIME(subTypeMIME);
                if(contentType.indexOf("application/x-macbinary") > 0)
                    m_startData = m_startData + 128;
                newFile.setSize((m_endData - m_startData) + 1);
                newFile.setStartData(m_startData);
                newFile.setEndData(m_endData);
                m_files.addFile(newFile);
            }
            else
            {
                String value = new String(m_binArray, m_startData, (m_endData - m_startData) + 1);
                m_formRequest.putParameter(fieldName, value);
            }
            if((char)m_binArray[m_currentIndex + 1] == '-')
                break;
            m_currentIndex = m_currentIndex + 2;
        }
        while(true);
    }

    public int save(String destPathName)
        throws SmartUploadException, IOException, ServletException
    {
        return save(destPathName, 0);
    }

    public int save(String destPathName, int option)
        throws SmartUploadException, IOException, ServletException
    {
        int count = 0;
        if(destPathName == null)
            destPathName = m_application.getRealPath("/");
        if(destPathName.indexOf("/") != -1)
        {
            if(destPathName.charAt(destPathName.length() - 1) != '/')
                destPathName = String.valueOf(destPathName).concat("/");
        }
        else
        if(destPathName.charAt(destPathName.length() - 1) != '\\')
            destPathName = String.valueOf(destPathName).concat("\\");
        for(int i = 0; i < m_files.getCount(); i++)
            if(!m_files.getFile(i).isMissing())
            {
                m_files.getFile(i).saveAs(destPathName + m_files.getFile(i).getFileName(), option);
                count++;
            }

        return count;
    }

    public int getSize()
    {
        return m_totalBytes;
    }

    public byte getBinaryData(int index)
    {
        byte retval;
        try
        {
            retval = m_binArray[index];
        }
        catch(Exception e)
        {
            throw new ArrayIndexOutOfBoundsException("Index out of range (1005).");
        }
        return retval;
    }

    public Files getFiles()
    {
        return m_files;
    }

    public Request getRequest()
    {
        return m_formRequest;
    }

    public void downloadFile(String sourceFilePathName)
        throws SmartUploadException, IOException, ServletException
    {
        downloadFile(sourceFilePathName, null, null);
    }

    public void downloadFile(String sourceFilePathName, String contentType)
        throws SmartUploadException, IOException, ServletException
    {
        downloadFile(sourceFilePathName, contentType, null);
    }

    public void downloadFile(String sourceFilePathName, String contentType, String destFileName)
        throws SmartUploadException, IOException, ServletException
    {
        downloadFile(sourceFilePathName, contentType, destFileName, 65000);
    }

    public void downloadFile(String sourceFilePathName, String contentType, String destFileName, int blockSize)
        throws SmartUploadException, IOException, ServletException
    {
        if(sourceFilePathName == null)
            throw new IllegalArgumentException(String.valueOf((new StringBuffer("File '")).append(sourceFilePathName).append("' not found (1040).")));
        if(sourceFilePathName.equals(""))
            throw new IllegalArgumentException(String.valueOf((new StringBuffer("File '")).append(sourceFilePathName).append("' not found (1040).")));
        if(!isVirtual(sourceFilePathName) && m_denyPhysicalPath)
            throw new SecurityException("Physical path is denied (1035).");
        if(isVirtual(sourceFilePathName))
            sourceFilePathName = m_application.getRealPath(sourceFilePathName);
        File file = new File(sourceFilePathName);
        FileInputStream fileIn = new FileInputStream(file);
        long fileLen = file.length();
        int readBytes = 0;
        int totalRead = 0;
        byte b[] = new byte[blockSize];
        if(contentType == null)
            m_response.setContentType("application/x-msdownload");
        else
        if(contentType.length() == 0)
            m_response.setContentType("application/x-msdownload");
        else
            m_response.setContentType(contentType);
        m_response.setContentLength((int)fileLen);
        m_contentDisposition = m_contentDisposition != null ? m_contentDisposition : "attachment;";
        if(destFileName == null)
            m_response.setHeader("Content-Disposition", String.valueOf((new StringBuffer(String.valueOf(m_contentDisposition))).append(" filename=").append(getFileName(sourceFilePathName))));
        else
        if(destFileName.length() == 0)
            m_response.setHeader("Content-Disposition", m_contentDisposition);
        else
            m_response.setHeader("Content-Disposition", String.valueOf((new StringBuffer(String.valueOf(m_contentDisposition))).append(" filename=").append(destFileName)));
        while((long)totalRead < fileLen) 
        {
            readBytes = fileIn.read(b, 0, blockSize);
            totalRead += readBytes;
            m_response.getOutputStream().write(b, 0, readBytes);
        }

        fileIn.close();
    }

    public void downloadField(ResultSet rs, String columnName, String contentType, String destFileName)
        throws SQLException, IOException, ServletException
    {
        if(rs == null)
            throw new IllegalArgumentException("The RecordSet cannot be null (1045).");
        if(columnName == null)
            throw new IllegalArgumentException("The columnName cannot be null (1050).");
        if(columnName.length() == 0)
            throw new IllegalArgumentException("The columnName cannot be empty (1055).");
        byte b[] = rs.getBytes(columnName);
        if(contentType == null)
            m_response.setContentType("application/x-msdownload");
        else
        if(contentType.length() == 0)
            m_response.setContentType("application/x-msdownload");
        else
            m_response.setContentType(contentType);
        m_response.setContentLength(b.length);
        if(destFileName == null)
            m_response.setHeader("Content-Disposition", "attachment;");
        else
        if(destFileName.length() == 0)
            m_response.setHeader("Content-Disposition", "attachment;");
        else
            m_response.setHeader("Content-Disposition", "attachment; filename=".concat(String.valueOf(destFileName)));
        m_response.getOutputStream().write(b, 0, b.length);
    }

    public void fieldToFile(ResultSet rs, String columnName, String destFilePathName)
        throws SQLException, SmartUploadException, IOException, ServletException
    {
        try
        {
            if(m_application.getRealPath(destFilePathName) != null)
                destFilePathName = m_application.getRealPath(destFilePathName);
            InputStream is_data = rs.getBinaryStream(columnName);
            FileOutputStream file = new FileOutputStream(destFilePathName);
            int c;
            while((c = is_data.read()) != -1) 
                file.write(c);

            file.close();
        }
        catch(Exception e)
        {
            throw new SmartUploadException("Unable to save file from the DataBase (1020).");
        }
    }

    private String getDataFieldValue(String dataHeader, String fieldName)
    {
        String token = new String();
        String value = new String();
        int pos = 0;
        int i = 0;
        int start = 0;
        int end = 0;
        token = String.valueOf((new StringBuffer(String.valueOf(fieldName))).append("=").append('"'));
        pos = dataHeader.indexOf(token);
        if(pos > 0)
        {
            i = pos + token.length();
            start = i;
            token = "\"";
            end = dataHeader.indexOf(token, i);
            if(start > 0 && end > 0)
                value = dataHeader.substring(start, end);
        }
        return value;
    }

    private String getFileExt(String fileName)
    {
        String value = new String();
        int start = 0;
        int end = 0;
        if(fileName == null)
            return null;
        start = fileName.lastIndexOf(46) + 1;