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ApacheMultipartParser.java
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1318 lines (1212 loc) · 47.8 KB
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package act.data;
import act.app.ActionContext;
import act.util.UploadFileStorageService;
import org.apache.commons.fileupload.*;
import org.apache.commons.fileupload.disk.DiskFileItem;
import org.apache.commons.fileupload.util.Closeable;
import org.apache.commons.fileupload.util.LimitedInputStream;
import org.apache.commons.io.FileCleaningTracker;
import org.apache.commons.io.FilenameUtils;
import org.apache.commons.io.output.DeferredFileOutputStream;
import org.osgl.exception.UnexpectedException;
import org.osgl.http.H;
import org.osgl.util.IO;
import java.io.*;
import java.util.HashMap;
import java.util.Map;
import java.util.NoSuchElementException;
/**
* Disclaim: The code come from PlayFramework 1.3
*/
public class ApacheMultipartParser extends RequestBodyParser {
/*
* Copyright 2001-2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* <p> The default implementation of the
* {@link org.apache.commons.fileupload.FileItem FileItem} interface.
*
* <p> After retrieving an instance of this class from a {@link
* org.apache.commons.fileupload.DiskFileUpload DiskFileUpload} instance (see
* {@link org.apache.commons.fileupload.DiskFileUpload
* #parseRequest(javax.servlet.http.HttpServletRequest)}), you may
* either request all contents of file at once using {@link #get()} or
* request an {@link java.io.InputStream InputStream} with
* {@link #getInputStream()} and process the file without attempting to load
* it into memory, which may come handy with large files.
*
* @author <a href="mailto:[email protected]">Rafal Krzewski</a>
* @author <a href="mailto:[email protected]">Sean Legassick</a>
* @author <a href="mailto:[email protected]">Jason van Zyl</a>
* @author <a href="mailto:[email protected]">John McNally</a>
* @author <a href="mailto:[email protected]">Martin Cooper</a>
* @author Sean C. Sullivan
*
* @since FileUpload 1.1
*
* @version $Id: DiskFileItem.java,v 1.3 2005/07/26 03:05:02 rafaelsteil Exp $
*/
public static class AutoFileItem implements FileItem {
private static FileCleaningTracker fileTracker;
static {
fileTracker = new FileCleaningTracker();
}
private ActionContext context;
// ----------------------------------------------------- Manifest constants
/**
* Default content charset to be used when no explicit charset
* parameter is provided by the sender. Media subtypes of the
* "text" type are defined to have a default charset value of
* "ISO-8859-1" when received via HTTP.
*/
public static final String DEFAULT_CHARSET = "ISO-8859-1";
/**
* Size of buffer to use when writing an item to disk.
*/
private static final int WRITE_BUFFER_SIZE = 2048;
// ----------------------------------------------------------- Data members
/**
* Counter used in unique identifier generation.
*/
private static int counter = 0;
/**
* The name of the form field as provided by the browser.
*/
private String fieldName;
/**
* The content type passed by the browser, or <code>null</code> if
* not defined.
*/
private String contentType;
/**
* Whether or not this item is a simple form field.
*/
private boolean isFormField;
/**
* The original filename in the user's filesystem.
*/
private String fileName;
/**
* The threshold above which uploads will be stored on disk.
*/
private int sizeThreshold;
/**
* The directory in which uploaded files will be stored, if stored on disk.
*/
private File repository;
/**
* Cached contents of the file.
*/
private byte[] cachedContent;
/**
* Output stream for this item.
*/
private DeferredFileOutputStream dfos;
/**
* The file items headers.
*/
private FileItemHeaders headers;
public AutoFileItem(FileItemStream stream, ActionContext context) {
this.fieldName = stream.getFieldName();
this.contentType = stream.getContentType();
this.isFormField = stream.isFormField();
this.fileName = FilenameUtils.getName(stream.getName());
this.sizeThreshold = 10240; //TODO: make it configurable
this.repository = null;
this.context = context;
}
// ------------------------------- Methods from javax.activation.DataSource
/**
* Returns an {@link java.io.InputStream InputStream} that can be
* used to retrieve the contents of the file.
*
* @return An {@link java.io.InputStream InputStream} that can be
* used to retrieve the contents of the file.
* @throws IOException if an error occurs.
*/
public InputStream getInputStream()
throws IOException {
if (!dfos.isInMemory()) {
return new FileInputStream(dfos.getFile());
}
if (cachedContent == null) {
cachedContent = dfos.getData();
}
return new ByteArrayInputStream(cachedContent);
}
/**
* Returns the content type passed by the agent or <code>null</code> if
* not defined.
*
* @return The content type passed by the agent or <code>null</code> if
* not defined.
*/
public String getContentType() {
return contentType;
}
/**
* Returns the content charset passed by the agent or <code>null</code> if
* not defined.
*
* @return The content charset passed by the agent or <code>null</code> if
* not defined.
*/
public String getCharSet() {
ParameterParser parser = new ParameterParser();
parser.setLowerCaseNames(true);
// Parameter parser can handle null input
Map params = parser.parse(getContentType(), ';');
return (String) params.get("charset");
}
/**
* Returns the original filename in the client's filesystem.
*
* @return The original filename in the client's filesystem.
*/
public String getName() {
return fileName;
}
// ------------------------------------------------------- FileItem methods
/**
* Provides a hint as to whether or not the file contents will be read
* from memory.
*
* @return <code>true</code> if the file contents will be read
* from memory; <code>false</code> otherwise.
*/
public boolean isInMemory() {
return (dfos.isInMemory());
}
/**
* Returns the size of the file.
*
* @return The size of the file, in bytes.
*/
public long getSize() {
if (cachedContent != null) {
return cachedContent.length;
} else if (dfos.isInMemory()) {
return dfos.getData().length;
} else {
return dfos.getFile().length();
}
}
/**
* Returns the contents of the file as an array of bytes. If the
* contents of the file were not yet cached in memory, they will be
* loaded from the disk storage and cached.
*
* @return The contents of the file as an array of bytes.
*/
public byte[] get() {
if (dfos.isInMemory()) {
if (cachedContent == null) {
cachedContent = dfos.getData();
}
return cachedContent;
}
byte[] fileData = new byte[(int) getSize()];
FileInputStream fis = null;
try {
fis = new FileInputStream(dfos.getFile());
fis.read(fileData);
} catch (IOException e) {
fileData = null;
} finally {
if (fis != null) {
try {
fis.close();
} catch (IOException e) {
// ignore
}
}
}
return fileData;
}
/**
* Returns the contents of the file as a String, using the specified
* encoding. This method uses {@link #get()} to retrieve the
* contents of the file.
*
* @param charset The charset to use.
* @return The contents of the file, as a string.
* @throws UnsupportedEncodingException if the requested character
* encoding is not available.
*/
public String getString(final String charset)
throws UnsupportedEncodingException {
return new String(get(), charset);
}
/**
* Returns the contents of the file as a String, using the default
* character encoding. This method uses {@link #get()} to retrieve the
* contents of the file.
*
* @return The contents of the file, as a string.
* @todo Consider making this method throw UnsupportedEncodingException.
*/
public String getString() {
byte[] rawdata = get();
String charset = getCharSet();
if (charset == null) {
charset = DEFAULT_CHARSET;
}
try {
return new String(rawdata, charset);
} catch (UnsupportedEncodingException e) {
return new String(rawdata);
}
}
/**
* A convenience method to write an uploaded item to disk. The client code
* is not concerned with whether or not the item is stored in memory, or on
* disk in a temporary location. They just want to write the uploaded item
* to a file.
* <p/>
* This implementation first attempts to rename the uploaded item to the
* specified destination file, if the item was originally written to disk.
* Otherwise, the data will be copied to the specified file.
* <p/>
* This method is only guaranteed to work <em>once</em>, the first time it
* is invoked for a particular item. This is because, in the event that the
* method renames a temporary file, that file will no longer be available
* to copy or rename again at a later time.
*
* @param file The <code>File</code> into which the uploaded item should
* be stored.
* @throws Exception if an error occurs.
*/
public void write(File file) throws Exception {
if (isInMemory()) {
FileOutputStream fout = null;
try {
fout = new FileOutputStream(file);
fout.write(get());
} finally {
if (fout != null) {
fout.close();
}
}
} else {
File outputFile = getStoreLocation();
if (outputFile != null) {
/*
* The uploaded file is being stored on disk
* in a temporary location so move it to the
* desired file.
*/
if (!outputFile.renameTo(file)) {
BufferedInputStream in = null;
BufferedOutputStream out = null;
try {
in = new BufferedInputStream(
new FileInputStream(outputFile));
out = new BufferedOutputStream(
new FileOutputStream(file));
byte[] bytes = new byte[WRITE_BUFFER_SIZE];
int s = 0;
while ((s = in.read(bytes)) != -1) {
out.write(bytes, 0, s);
}
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
// ignore
}
}
if (out != null) {
try {
out.close();
} catch (IOException e) {
// ignore
}
}
}
}
} else {
/*
* For whatever reason we cannot write the
* file to disk.
*/
throw new FileUploadException(
"Cannot write uploaded file to disk!");
}
}
}
/**
* Deletes the underlying storage for a file item, including deleting any
* associated temporary disk file. Although this storage will be deleted
* automatically when the <code>FileItem</code> instance is garbage
* collected, this method can be used to ensure that this is done at an
* earlier time, thus preserving system resources.
*/
public void delete() {
cachedContent = null;
File outputFile = getStoreLocation();
if (outputFile != null && outputFile.exists()) {
outputFile.delete();
}
}
/**
* Returns the name of the field in the multipart form corresponding to
* this file item.
*
* @return The name of the form field.
* @see #setFieldName(java.lang.String)
*/
public String getFieldName() {
return fieldName;
}
/**
* Sets the field name used to reference this file item.
*
* @param fieldName The name of the form field.
* @see #getFieldName()
*/
public void setFieldName(String fieldName) {
this.fieldName = fieldName;
}
/**
* Determines whether or not a <code>FileItem</code> instance represents
* a simple form field.
*
* @return <code>true</code> if the instance represents a simple form
* field; <code>false</code> if it represents an uploaded file.
* @see #setFormField(boolean)
*/
public boolean isFormField() {
return isFormField;
}
/**
* Specifies whether or not a <code>FileItem</code> instance represents
* a simple form field.
*
* @param state <code>true</code> if the instance represents a simple form
* field; <code>false</code> if it represents an uploaded file.
* @see #isFormField()
*/
public void setFormField(boolean state) {
isFormField = state;
}
/**
* Returns an {@link java.io.OutputStream OutputStream} that can
* be used for storing the contents of the file.
*
* @return An {@link java.io.OutputStream OutputStream} that can be used
* for storing the contensts of the file.
* @throws IOException if an error occurs.
*/
public OutputStream getOutputStream() throws IOException {
if (dfos == null) {
File outputFile = null;
if (sizeThreshold != Integer.MAX_VALUE) {
outputFile = getTempFile(context);
}
dfos = new DeferredFileOutputStream(sizeThreshold, outputFile);
}
return dfos;
}
// --------------------------------------------------------- Public methods
/**
* Returns the {@link java.io.File} object for the <code>FileItem</code>'s
* data's temporary location on the disk. Note that for
* <code>FileItem</code>s that have their data stored in memory,
* this method will return <code>null</code>. When handling large
* files, you can use {@link java.io.File#renameTo(java.io.File)} to
* move the file to new location without copying the data, if the
* source and destination locations reside within the same logical
* volume.
*
* @return The data file, or <code>null</code> if the data is stored in
* memory.
*/
public File getStoreLocation() {
return dfos.getFile();
}
// ------------------------------------------------------ Protected methods
/**
* Removes the file contents from the temporary storage.
*/
protected void finalize() {
File outputFile = dfos.getFile();
if (outputFile != null && outputFile.exists()) {
outputFile.delete();
}
}
/**
* Creates and returns a {@link java.io.File File} representing a uniquely
* named temporary file in the configured repository path. The lifetime of
* the file is tied to the lifetime of the <code>FileItem</code> instance;
* the file will be deleted when the instance is garbage collected.
*
* @return The {@link java.io.File File} to be used for temporary storage.
*/
protected File getTempFile(ActionContext context) {
File tempDir = repository;
if (tempDir == null) {
tempDir = context.app().tmpDir();
}
String fileName = "upload_" + getUniqueId() + ".tmp";
File f = new File(tempDir, fileName);
fileTracker.track(f, this);
return f;
}
// -------------------------------------------------------- Private methods
/**
* Returns an identifier that is unique within the class loader used to
* load this class, but does not have random-like apearance.
*
* @return A String with the non-random looking instance identifier.
*/
private static String getUniqueId() {
int current;
synchronized (DiskFileItem.class) {
current = counter++;
}
String id = Integer.toString(current);
// If you manage to get more than 100 million of ids, you'll
// start getting ids longer than 8 characters.
if (current < 100000000) {
id = ("00000000" + id).substring(id.length());
}
return id;
}
public String toString() {
return "name=" + this.getName() + ", StoreLocation=" + String.valueOf(this.getStoreLocation()) + ", size=" + this.getSize() + "bytes, " + "isFormField=" + isFormField() + ", FieldName=" + this.getFieldName();
}
/**
* Returns the file item headers.
*
* @return The file items headers.
*/
@Override
public FileItemHeaders getHeaders() {
return headers;
}
/**
* Sets the file item headers.
*
* @param pHeaders
* The file items headers.
*/
@Override
public void setHeaders(FileItemHeaders pHeaders) {
headers = pHeaders;
}
}
@Override
public Map<String, String[]> parse(ActionContext context) {
H.Request request = context.req();
InputStream body = request.inputStream();
Map<String, String[]> result = new HashMap<String, String[]>();
try {
FileItemIteratorImpl iter = new FileItemIteratorImpl(body, request.header("content-type"), request.characterEncoding());
while (iter.hasNext()) {
FileItemStream item = iter.next();
FileItem fileItem = new AutoFileItem(item, context);
try {
IO.copy(item.openStream(), fileItem.getOutputStream(), true);
} catch (FileUploadIOException e) {
throw (FileUploadException) e.getCause();
} catch (IOException e) {
throw new IOFileUploadException("Processing of " + MULTIPART_FORM_DATA + " request failed. " + e.getMessage(), e);
}
if (fileItem.isFormField()) {
// must resolve encoding
String _encoding = request.characterEncoding(); // this is our default
String _contentType = fileItem.getContentType();
if( _contentType != null ) {
ContentTypeWithEncoding contentTypeEncoding = ContentTypeWithEncoding.parse(_contentType);
if( contentTypeEncoding.encoding != null ) {
_encoding = contentTypeEncoding.encoding;
}
}
MapUtil.mergeValueInMap(result, fileItem.getFieldName(), fileItem.getString(_encoding));
} else {
context.addUpload(fileItem.getFieldName(), UploadFileStorageService.store(fileItem, context.app()));
MapUtil.mergeValueInMap(result, fileItem.getFieldName(), fileItem.getFieldName());
}
}
} catch (FileUploadIOException e) {
logger.debug(e, "error");
throw new IllegalStateException("Error when handling upload", e);
} catch (IOException e) {
logger.debug(e, "error");
throw new IllegalStateException("Error when handling upload", e);
} catch (FileUploadException e) {
logger.debug(e, "error");
throw new IllegalStateException("Error when handling upload", e);
} catch (Exception e) {
logger.debug(e, "error");
throw new UnexpectedException(e);
}
return result;
} // ---------------------------------------------------------- Class methods
// ----------------------------------------------------- Manifest constants
/**
* HTTP content type header name.
*/
private static final String CONTENT_TYPE = "Content-type";
/**
* HTTP content disposition header name.
*/
private static final String CONTENT_DISPOSITION = "Content-disposition";
/**
* Content-disposition value for form data.
*/
private static final String FORM_DATA = "form-data";
/**
* Content-disposition value for file attachment.
*/
private static final String ATTACHMENT = "attachment";
/**
* Part of HTTP content type header.
*/
private static final String MULTIPART = "multipart/";
/**
* HTTP content type header for multipart forms.
*/
private static final String MULTIPART_FORM_DATA = "multipart/form-data";
/**
* HTTP content type header for multiple uploads.
*/
private static final String MULTIPART_MIXED = "multipart/mixed";
// ----------------------------------------------------------- Data members
/**
* The maximum size permitted for the complete request, as opposed to
* {@link #fileSizeMax}. A value of -1 indicates no maximum.
*/
private long sizeMax = -1;
/**
* The maximum size permitted for a single uploaded file, as opposed to
* {@link #sizeMax}. A value of -1 indicates no maximum.
*/
private long fileSizeMax = -1;
// ------------------------------------------------------ Protected methods
/**
* Retrieves the boundary from the <code>Content-type</code> header.
*
* @param contentType The value of the content type header from which to extract the
* boundary value.
* @return The boundary, as a byte array.
*/
private byte[] getBoundary(String contentType) {
ParameterParser parser = new ParameterParser();
parser.setLowerCaseNames(true);
// Parameter parser can handle null input
Map params = parser.parse(contentType, ';');
String boundaryStr = (String) params.get("boundary");
if (boundaryStr == null) {
return null;
}
byte[] boundary;
try {
boundary = boundaryStr.getBytes("ISO-8859-1");
} catch (UnsupportedEncodingException e) {
boundary = boundaryStr.getBytes();
}
return boundary;
}
/**
* Retrieves the file name from the <code>Content-disposition</code>
* header.
*
* @param headers A <code>Map</code> containing the HTTP request headers.
* @return The file name for the current <code>encapsulation</code>.
*/
private String getFileName(Map /* String, String */ headers) {
String fileName = null;
String cd = getHeader(headers, CONTENT_DISPOSITION);
if (cd != null) {
String cdl = cd.toLowerCase();
if (cdl.startsWith(FORM_DATA) || cdl.startsWith(ATTACHMENT)) {
ParameterParser parser = new ParameterParser();
parser.setLowerCaseNames(true);
// Parameter parser can handle null input
Map params = parser.parse(cd, ';');
if (params.containsKey("filename")) {
fileName = (String) params.get("filename");
if (fileName != null) {
fileName = fileName.trim();
// IE7 returning fullpath name (#300920)
if (fileName.indexOf('\\') != -1) {
fileName = fileName.substring(fileName.lastIndexOf('\\') + 1);
}
} else {
// Even if there is no value, the parameter is present,
// so we return an empty file name rather than no file
// name.
fileName = "";
}
}
}
}
return fileName;
}
/**
* Retrieves the field name from the <code>Content-disposition</code>
* header.
*
* @param headers A <code>Map</code> containing the HTTP request headers.
* @return The field name for the current <code>encapsulation</code>.
*/
private String getFieldName(Map /* String, String */ headers) {
String fieldName = null;
String cd = getHeader(headers, CONTENT_DISPOSITION);
if (cd != null && cd.toLowerCase().startsWith(FORM_DATA)) {
ParameterParser parser = new ParameterParser();
parser.setLowerCaseNames(true);
// Parameter parser can handle null input
Map params = parser.parse(cd, ';');
fieldName = (String) params.get("name");
if (fieldName != null) {
fieldName = fieldName.trim();
}
}
return fieldName;
}
/**
* <p/>
* Parses the <code>header-part</code> and returns as key/value pairs.
* <p/>
* <p/>
* If there are multiple headers of the same names, the name will map to a
* comma-separated list containing the values.
*
* @param headerPart The <code>header-part</code> of the current
* <code>encapsulation</code>.
* @return A <code>Map</code> containing the parsed HTTP request headers.
*/
private Map /* String, String */ parseHeaders(String headerPart) {
final int len = headerPart.length();
Map<String, String> headers = new HashMap<String, String>();
int start = 0;
for (; ;) {
int end = parseEndOfLine(headerPart, start);
if (start == end) {
break;
}
String header = headerPart.substring(start, end);
start = end + 2;
while (start < len) {
int nonWs = start;
while (nonWs < len) {
char c = headerPart.charAt(nonWs);
if (c != ' ' && c != '\t') {
break;
}
++nonWs;
}
if (nonWs == start) {
break;
}
// Continuation line found
end = parseEndOfLine(headerPart, nonWs);
header += " " + headerPart.substring(nonWs, end);
start = end + 2;
}
parseHeaderLine(headers, header);
}
return headers;
}
/**
* Skips bytes until the end of the current line.
*
* @param headerPart The headers, which are being parsed.
* @param end Index of the last byte, which has yet been processed.
* @return Index of the \r\n sequence, which indicates end of line.
*/
private int parseEndOfLine(String headerPart, int end) {
int index = end;
for (; ;) {
int offset = headerPart.indexOf('\r', index);
if (offset == -1 || offset + 1 >= headerPart.length()) {
throw new IllegalStateException("Expected headers to be terminated by an empty line.");
}
if (headerPart.charAt(offset + 1) == '\n') {
return offset;
}
index = offset + 1;
}
}
/**
* Reads the next header line.
*
* @param headers String with all headers.
* @param header Map where to store the current header.
*/
private void parseHeaderLine(Map<String, String> headers, String header) {
final int colonOffset = header.indexOf(':');
if (colonOffset == -1) {
// This header line is malformed, skip it.
return;
}
String headerName = header.substring(0, colonOffset).trim().toLowerCase();
String headerValue = header.substring(header.indexOf(':') + 1).trim();
if (getHeader(headers, headerName) != null) {
// More that one heder of that name exists,
// append to the list.
headers.put(headerName, getHeader(headers, headerName) + ',' + headerValue);
} else {
headers.put(headerName, headerValue);
}
}
/**
* Returns the header with the specified name from the supplied map. The
* header lookup is case-insensitive.
*
* @param headers A <code>Map</code> containing the HTTP request headers.
* @param name The name of the header to return.
* @return The value of specified header, or a comma-separated list if there
* were multiple headers of that name.
*/
private final String getHeader(Map /* String, String */ headers, String name) {
return (String) headers.get(name.toLowerCase());
}
/**
* The iterator, which is returned by
* {@link FileUploadBase#getItemIterator(RequestContext)}.
*/
private class FileItemIteratorImpl implements FileItemIterator {
/**
* Default implementation of {@link FileItemStream}.
*/
private class FileItemStreamImpl implements FileItemStream {
/**
* The file items content type.
*/
private final String contentType;
/**
* The file items field name.
*/
private final String fieldName;
/**
* The file items file name.
*/
private final String name;
/**
* Whether the file item is a form field.
*/
private final boolean formField;
/**
* The file items input stream.
*/
private final InputStream stream;
/**
* Whether the file item was already opened.
*/
private boolean opened;
private FileItemHeaders fileItemHeaders;
/**
* CReates a new instance.
*
* @param pName The items file name, or null.
* @param pFieldName The items field name.
* @param pContentType The items content type, or null.
* @param pFormField Whether the item is a form field.
*/
FileItemStreamImpl(String pName, String pFieldName, String pContentType, boolean pFormField) {
name = pName;
fieldName = pFieldName;
contentType = pContentType;
formField = pFormField;
InputStream istream = multi.newInputStream();
if (fileSizeMax != -1) {
istream = new LimitedInputStream(istream, fileSizeMax) {
protected void raiseError(long pSizeMax, long pCount) throws IOException {
FileUploadException e = new FileSizeLimitExceededException("The field " + fieldName + " exceeds its maximum permitted " + " size of " + pSizeMax + " characters.", pCount, pSizeMax);
throw new FileUploadIOException(e);
}
};
}
stream = istream;
}
public FileItemHeaders getHeaders() {
return fileItemHeaders;
}
public void setHeaders(FileItemHeaders fileItemHeaders) {
this.fileItemHeaders = fileItemHeaders;
}
/**
* Returns the items content type, or null.
*
* @return Content type, if known, or null.
*/
public String getContentType() {
return contentType;
}
/**
* Returns the items field name.
*
* @return Field name.
*/
public String getFieldName() {
return fieldName;
}
/**
* Returns the items file name.
*
* @return File name, if known, or null.
*/
public String getName() {
return name;
}
/**
* Returns, whether this is a form field.
*
* @return True, if the item is a form field, otherwise false.
*/
public boolean isFormField() {
return formField;
}
/**
* Returns an input stream, which may be used to read the items
* contents.
*
* @return Opened input stream.
* @throws IOException An I/O error occurred.
*/
public InputStream openStream() throws IOException {
if (opened) {
throw new IllegalStateException("The stream was already opened.");
}
if (((Closeable) stream).isClosed()) {
throw new FileItemStream.ItemSkippedException();
}
return stream;
}
/**
* Closes the file item.
*
* @throws IOException An I/O error occurred.
*/
void close() throws IOException {
stream.close();
}
}
/**
* The multi part stream to process.
*/
private final MultipartStream multi;
/**
* The boundary, which separates the various parts.
*/
private final byte[] boundary;
/**
* The item, which we currently process.
*/
private FileItemStreamImpl currentItem;
/**
* The current items field name.
*/
private String currentFieldName;
/**
* Whether we are currently skipping the preamble.
*/
private boolean skipPreamble;
/**
* Whether the current item may still be read.
*/
private boolean itemValid;
/**
* Whether we have seen the end of the file.
*/
private boolean eof;
/**