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@ -16,33 +16,28 @@
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*/ |
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package com.fr.third.org.apache.commons.fileupload.disk; |
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import static java.lang.String.format; |
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import com.fr.third.org.apache.commons.fileupload.FileItem; |
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import com.fr.third.org.apache.commons.fileupload.FileItemHeaders; |
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import com.fr.third.org.apache.commons.fileupload.FileUploadException; |
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import com.fr.third.org.apache.commons.fileupload.ParameterParser; |
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import com.fr.third.org.apache.commons.fileupload.util.Streams; |
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import com.fr.third.org.apache.commons.io.FileUtils; |
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import com.fr.third.org.apache.commons.io.IOUtils; |
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import com.fr.third.org.apache.commons.io.output.DeferredFileOutputStream; |
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import java.io.BufferedInputStream; |
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import java.io.BufferedOutputStream; |
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import java.io.ByteArrayInputStream; |
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import java.io.File; |
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import java.io.FileInputStream; |
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import java.io.FileOutputStream; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.io.ObjectInputStream; |
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import java.io.ObjectOutputStream; |
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import java.io.OutputStream; |
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import java.io.UnsupportedEncodingException; |
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import java.util.Map; |
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import java.util.UUID; |
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import java.util.concurrent.atomic.AtomicInteger; |
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import com.fr.third.org.apache.commons.fileupload.FileItem; |
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import com.fr.third.org.apache.commons.fileupload.FileItemHeaders; |
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import com.fr.third.org.apache.commons.fileupload.FileUploadException; |
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import com.fr.third.org.apache.commons.fileupload.InvalidFileNameException; |
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import com.fr.third.org.apache.commons.fileupload.ParameterParser; |
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import com.fr.third.org.apache.commons.fileupload.servlet.ServletFileUpload; |
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import com.fr.third.org.apache.commons.fileupload.util.Streams; |
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import com.fr.third.org.apache.commons.io.IOUtils; |
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import com.fr.third.org.apache.commons.io.output.DeferredFileOutputStream; |
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import static java.lang.String.format; |
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/** |
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* <p> The default implementation of the |
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@ -50,47 +45,34 @@ import com.fr.third.org.apache.commons.io.output.DeferredFileOutputStream;
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* |
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* <p> After retrieving an instance of this class from a {@link |
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* DiskFileItemFactory} instance (see |
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* {@link ServletFileUpload |
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* {@link com.fr.third.org.apache.commons.fileupload.servlet.ServletFileUpload |
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* #parseRequest(javax.servlet.http.HttpServletRequest)}), you may |
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* either request all contents of file at once using {@link #get()} or |
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* request an {@link java.io.InputStream InputStream} with |
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* request an {@link InputStream InputStream} with |
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* {@link #getInputStream()} and process the file without attempting to load |
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* it into memory, which may come handy with large files. |
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* |
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* <p>Temporary files, which are created for file items, should be |
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* deleted later on. The best way to do this is using a |
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* {@link org.apache.commons.io.FileCleaningTracker}, which you can set on the |
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* {@link com.fr.third.org.apache.commons.io.FileCleaningTracker}, which you can set on the |
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* {@link DiskFileItemFactory}. However, if you do use such a tracker, |
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* then you must consider the following: Temporary files are automatically |
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* deleted as soon as they are no longer needed. (More precisely, when the |
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* corresponding instance of {@link java.io.File} is garbage collected.) |
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* corresponding instance of {@link File} is garbage collected.) |
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* This is done by the so-called reaper thread, which is started and stopped |
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* automatically by the {@link org.apache.commons.io.FileCleaningTracker} when |
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* automatically by the {@link com.fr.third.org.apache.commons.io.FileCleaningTracker} when |
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* there are files to be tracked. |
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* It might make sense to terminate that thread, for example, if |
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* your web application ends. See the section on "Resource cleanup" |
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* in the users guide of commons-fileupload.</p> |
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* |
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* @since FileUpload 1.1 |
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* |
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* @version $Id$ |
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*/ |
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public class DiskFileItem |
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implements FileItem { |
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/** |
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* Although it implements {@link java.io.Serializable}, a DiskFileItem can actually only be deserialized, |
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* if this System property is true. |
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*/ |
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public static final String SERIALIZABLE_PROPERTY = DiskFileItem.class.getName() + ".serializable"; |
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// ----------------------------------------------------- Manifest constants
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/** |
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* The UID to use when serializing this instance. |
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*/ |
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private static final long serialVersionUID = 2237570099615271025L; |
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/** |
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* Default content charset to be used when no explicit charset |
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* parameter is provided by the sender. Media subtypes of the |
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@ -166,14 +148,15 @@ public class DiskFileItem
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private transient File tempFile; |
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/** |
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* File to allow for serialization of the content of this item. |
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* The file items headers. |
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*/ |
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private File dfosFile; |
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private FileItemHeaders headers; |
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/** |
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* The file items headers. |
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* Default content charset to be used when no explicit charset |
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* parameter is provided by the sender. |
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*/ |
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private FileItemHeaders headers; |
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private String defaultCharset = DEFAULT_CHARSET; |
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// ----------------------------------------------------------- Constructors
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@ -208,14 +191,15 @@ public class DiskFileItem
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// ------------------------------- Methods from javax.activation.DataSource
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/** |
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* Returns an {@link java.io.InputStream InputStream} that can be |
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* Returns an {@link InputStream InputStream} that can be |
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* used to retrieve the contents of the file. |
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* |
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* @return An {@link java.io.InputStream InputStream} that can be |
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* @return An {@link InputStream InputStream} that can be |
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* used to retrieve the contents of the file. |
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* |
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* @throws IOException if an error occurs. |
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*/ |
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@Override |
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public InputStream getInputStream() |
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throws IOException { |
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if (!isInMemory()) { |
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@ -235,6 +219,7 @@ public class DiskFileItem
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* @return The content type passed by the agent or <code>null</code> if |
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* not defined. |
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*/ |
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@Override |
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public String getContentType() { |
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return contentType; |
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} |
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@ -258,11 +243,12 @@ public class DiskFileItem
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* Returns the original filename in the client's filesystem. |
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* |
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* @return The original filename in the client's filesystem. |
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* @throws InvalidFileNameException The file name contains a NUL character, |
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* @throws com.fr.third.org.apache.commons.fileupload.InvalidFileNameException The file name contains a NUL character, |
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* which might be an indicator of a security attack. If you intend to |
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* use the file name anyways, catch the exception and use |
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* {@link InvalidFileNameException#getName()}. |
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* {@link com.fr.third.org.apache.commons.fileupload.InvalidFileNameException#getName()}. |
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*/ |
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@Override |
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public String getName() { |
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return Streams.checkFileName(fileName); |
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} |
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@ -276,6 +262,7 @@ public class DiskFileItem
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* @return <code>true</code> if the file contents will be read |
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* from memory; <code>false</code> otherwise. |
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*/ |
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@Override |
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public boolean isInMemory() { |
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if (cachedContent != null) { |
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return true; |
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@ -288,6 +275,7 @@ public class DiskFileItem
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* |
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* @return The size of the file, in bytes. |
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*/ |
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@Override |
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public long getSize() { |
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if (size >= 0) { |
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return size; |
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@ -305,11 +293,13 @@ public class DiskFileItem
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* contents of the file were not yet cached in memory, they will be |
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* loaded from the disk storage and cached. |
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* |
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* @return The contents of the file as an array of bytes. |
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* @return The contents of the file as an array of bytes |
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* or {@code null} if the data cannot be read |
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*/ |
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@Override |
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public byte[] get() { |
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if (isInMemory()) { |
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if (cachedContent == null) { |
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if (cachedContent == null && dfos != null) { |
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cachedContent = dfos.getData(); |
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} |
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return cachedContent; |
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@ -319,18 +309,12 @@ public class DiskFileItem
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InputStream fis = null; |
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try { |
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fis = new BufferedInputStream(new FileInputStream(dfos.getFile())); |
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fis.read(fileData); |
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fis = new FileInputStream(dfos.getFile()); |
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IOUtils.readFully(fis, fileData); |
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} catch (IOException e) { |
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fileData = null; |
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} finally { |
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if (fis != null) { |
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try { |
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fis.close(); |
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} catch (IOException e) { |
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// ignore
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} |
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} |
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IOUtils.closeQuietly(fis); |
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} |
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return fileData; |
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@ -348,6 +332,7 @@ public class DiskFileItem
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* @throws UnsupportedEncodingException if the requested character |
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* encoding is not available. |
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*/ |
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@Override |
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public String getString(final String charset) |
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throws UnsupportedEncodingException { |
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return new String(get(), charset); |
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@ -362,11 +347,12 @@ public class DiskFileItem
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* |
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* @return The contents of the file, as a string. |
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*/ |
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@Override |
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public String getString() { |
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byte[] rawdata = get(); |
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String charset = getCharSet(); |
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if (charset == null) { |
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charset = DEFAULT_CHARSET; |
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charset = defaultCharset; |
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} |
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try { |
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return new String(rawdata, charset); |
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@ -395,16 +381,16 @@ public class DiskFileItem
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* |
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* @throws Exception if an error occurs. |
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*/ |
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@Override |
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public void write(File file) throws Exception { |
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if (isInMemory()) { |
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FileOutputStream fout = null; |
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try { |
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fout = new FileOutputStream(file); |
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fout.write(get()); |
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fout.close(); |
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} finally { |
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if (fout != null) { |
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fout.close(); |
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} |
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IOUtils.closeQuietly(fout); |
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} |
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} else { |
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File outputFile = getStoreLocation(); |
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@ -416,32 +402,10 @@ public class DiskFileItem
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* in a temporary location so move it to the |
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* desired file. |
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*/ |
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if (!outputFile.renameTo(file)) { |
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BufferedInputStream in = null; |
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BufferedOutputStream out = null; |
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try { |
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in = new BufferedInputStream( |
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new FileInputStream(outputFile)); |
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out = new BufferedOutputStream( |
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new FileOutputStream(file)); |
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IOUtils.copy(in, out); |
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} finally { |
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if (in != null) { |
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try { |
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in.close(); |
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} catch (IOException e) { |
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// ignore
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} |
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} |
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if (out != null) { |
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try { |
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out.close(); |
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} catch (IOException e) { |
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// ignore
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} |
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} |
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} |
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if (file.exists()) { |
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file.delete(); |
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} |
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FileUtils.moveFile(outputFile, file); |
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} else { |
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/* |
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* For whatever reason we cannot write the |
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@ -460,10 +424,11 @@ public class DiskFileItem
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* collected, this method can be used to ensure that this is done at an |
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* earlier time, thus preserving system resources. |
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*/ |
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@Override |
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public void delete() { |
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cachedContent = null; |
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File outputFile = getStoreLocation(); |
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if (outputFile != null && outputFile.exists()) { |
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if (outputFile != null && !isInMemory() && outputFile.exists()) { |
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outputFile.delete(); |
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} |
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} |
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@ -474,9 +439,10 @@ public class DiskFileItem
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* |
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* @return The name of the form field. |
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* |
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* @see #setFieldName(java.lang.String) |
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* @see #setFieldName(String) |
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* |
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*/ |
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@Override |
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public String getFieldName() { |
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return fieldName; |
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} |
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@ -489,6 +455,7 @@ public class DiskFileItem
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* @see #getFieldName() |
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* |
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*/ |
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@Override |
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public void setFieldName(String fieldName) { |
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this.fieldName = fieldName; |
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} |
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@ -503,6 +470,7 @@ public class DiskFileItem
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* @see #setFormField(boolean) |
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* |
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*/ |
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@Override |
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public boolean isFormField() { |
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return isFormField; |
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} |
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@ -517,19 +485,21 @@ public class DiskFileItem
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* @see #isFormField() |
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* |
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*/ |
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@Override |
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public void setFormField(boolean state) { |
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isFormField = state; |
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} |
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/** |
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* Returns an {@link java.io.OutputStream OutputStream} that can |
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* Returns an {@link OutputStream OutputStream} that can |
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* be used for storing the contents of the file. |
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* |
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* @return An {@link java.io.OutputStream OutputStream} that can be used |
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* for storing the contensts of the file. |
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* @return An {@link OutputStream OutputStream} that can be used |
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* for storing the contents of the file. |
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* |
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* @throws IOException if an error occurs. |
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*/ |
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@Override |
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public OutputStream getOutputStream() |
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throws IOException { |
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if (dfos == null) { |
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@ -542,11 +512,11 @@ public class DiskFileItem
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// --------------------------------------------------------- Public methods
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/** |
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* Returns the {@link java.io.File} object for the <code>FileItem</code>'s |
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* Returns the {@link File} object for the <code>FileItem</code>'s |
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* data's temporary location on the disk. Note that for |
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* <code>FileItem</code>s that have their data stored in memory, |
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* this method will return <code>null</code>. When handling large |
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* files, you can use {@link java.io.File#renameTo(java.io.File)} to |
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* files, you can use {@link File#renameTo(File)} to |
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* move the file to new location without copying the data, if the |
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* source and destination locations reside within the same logical |
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* volume. |
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@ -558,6 +528,9 @@ public class DiskFileItem
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if (dfos == null) { |
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return null; |
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} |
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if (isInMemory()) { |
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return null; |
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} |
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return dfos.getFile(); |
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} |
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@ -568,6 +541,9 @@ public class DiskFileItem
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*/ |
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@Override |
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protected void finalize() { |
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if (dfos == null || dfos.isInMemory()) { |
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return; |
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} |
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File outputFile = dfos.getFile(); |
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if (outputFile != null && outputFile.exists()) { |
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@ -576,12 +552,15 @@ public class DiskFileItem
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} |
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/** |
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* Creates and returns a {@link java.io.File File} representing a uniquely |
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* Creates and returns a {@link File File} representing a uniquely |
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* named temporary file in the configured repository path. The lifetime of |
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* the file is tied to the lifetime of the <code>FileItem</code> instance; |
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* the file will be deleted when the instance is garbage collected. |
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* <p> |
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* <b>Note: Subclasses that override this method must ensure that they return the |
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* same File each time.</b> |
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* |
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* @return The {@link java.io.File File} to be used for temporary storage. |
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* @return The {@link File File} to be used for temporary storage. |
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*/ |
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protected File getTempFile() { |
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if (tempFile == null) { |
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@ -601,7 +580,7 @@ public class DiskFileItem
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/** |
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* Returns an identifier that is unique within the class loader used to |
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* load this class, but does not have random-like apearance. |
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* load this class, but does not have random-like appearance. |
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* |
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* @return A String with the non-random looking instance identifier. |
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*/ |
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@ -630,83 +609,11 @@ public class DiskFileItem
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Boolean.valueOf(isFormField()), getFieldName()); |
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} |
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// -------------------------------------------------- Serialization methods
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/** |
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* Writes the state of this object during serialization. |
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* |
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* @param out The stream to which the state should be written. |
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* |
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* @throws IOException if an error occurs. |
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*/ |
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private void writeObject(ObjectOutputStream out) throws IOException { |
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// Read the data
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if (dfos.isInMemory()) { |
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cachedContent = get(); |
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} else { |
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cachedContent = null; |
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dfosFile = dfos.getFile(); |
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} |
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// write out values
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out.defaultWriteObject(); |
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} |
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/** |
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* Reads the state of this object during deserialization. |
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* |
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* @param in The stream from which the state should be read. |
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* |
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* @throws IOException if an error occurs. |
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* @throws ClassNotFoundException if class cannot be found. |
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*/ |
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private void readObject(ObjectInputStream in) |
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throws IOException, ClassNotFoundException { |
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if (!Boolean.getBoolean(SERIALIZABLE_PROPERTY)) { |
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throw new IllegalStateException("Property " + SERIALIZABLE_PROPERTY |
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+ " is not true, rejecting to deserialize a DiskFileItem."); |
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} |
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// read values
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in.defaultReadObject(); |
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/* One expected use of serialization is to migrate HTTP sessions |
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* containing a DiskFileItem between JVMs. Particularly if the JVMs are |
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* on different machines It is possible that the repository location is |
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* not valid so validate it. |
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*/ |
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if (repository != null) { |
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if (repository.isDirectory()) { |
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// Check path for nulls
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if (repository.getPath().contains("\0")) { |
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throw new IOException(format( |
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"The repository [%s] contains a null character", |
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repository.getPath())); |
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} |
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} else { |
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throw new IOException(format( |
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"The repository [%s] is not a directory", |
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repository.getAbsolutePath())); |
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} |
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} |
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OutputStream output = getOutputStream(); |
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if (cachedContent != null) { |
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output.write(cachedContent); |
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} else { |
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FileInputStream input = new FileInputStream(dfosFile); |
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IOUtils.copy(input, output); |
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dfosFile.delete(); |
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dfosFile = null; |
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} |
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output.close(); |
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cachedContent = null; |
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} |
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/** |
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* Returns the file item headers. |
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* @return The file items headers. |
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*/ |
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@Override |
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public FileItemHeaders getHeaders() { |
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return headers; |
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} |
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@ -715,8 +622,26 @@ public class DiskFileItem
|
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|
|
* Sets the file item headers. |
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* @param pHeaders The file items headers. |
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*/ |
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@Override |
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public void setHeaders(FileItemHeaders pHeaders) { |
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headers = pHeaders; |
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} |
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/** |
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* Returns the default charset for use when no explicit charset |
|
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* parameter is provided by the sender. |
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* @return the default charset |
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*/ |
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public String getDefaultCharset() { |
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return defaultCharset; |
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} |
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/** |
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|
|
* Sets the default charset for use when no explicit charset |
|
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|
* parameter is provided by the sender. |
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* @param charset the default charset |
|
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|
*/ |
|
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|
|
public void setDefaultCharset(String charset) { |
|
|
|
|
defaultCharset = charset; |
|
|
|
|
} |
|
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|
|
} |
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Yuan.Wang-王垣
2 years ago