org.apache.commons.fileupload.FileUploadBase Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package org.apache.commons.fileupload;
import static java.lang.String.format;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.NoSuchElementException;
import org.apache.commons.fileupload.MultipartStream.ItemInputStream;
import org.apache.commons.fileupload.util.Closeable;
import org.apache.commons.fileupload.util.FileItemHeadersImpl;
import org.apache.commons.fileupload.util.LimitedInputStream;
import org.apache.commons.fileupload.util.Streams;
import org.apache.commons.io.IOUtils;
/**
* High level API for processing file uploads.
*
* This class handles multiple files per single HTML widget, sent using
* multipart/mixed encoding type, as specified by
* RFC 1867. Use {@link
* #parseRequest(RequestContext)} to acquire a list of {@link
* org.apache.commons.fileupload.FileItem}s associated with a given HTML
* widget.
*
* How the data for individual parts is stored is determined by the factory
* used to create them; a given part may be in memory, on disk, or somewhere
* else.
*/
public abstract class FileUploadBase {
// ---------------------------------------------------------- Class methods
/**
* Utility method that determines whether the request contains multipart
* content.
*
* NOTE:This method will be moved to the
* ServletFileUpload class after the FileUpload 1.1 release.
* Unfortunately, since this method is static, it is not possible to
* provide its replacement until this method is removed.
*
* @param ctx The request context to be evaluated. Must be non-null.
*
* @return true if the request is multipart;
* false otherwise.
*/
public static final boolean isMultipartContent(RequestContext ctx) {
String contentType = ctx.getContentType();
if (contentType == null) {
return false;
}
if (contentType.toLowerCase(Locale.ENGLISH).startsWith(MULTIPART)) {
return true;
}
return false;
}
// ----------------------------------------------------- Manifest constants
/**
* HTTP content type header name.
*/
public static final String CONTENT_TYPE = "Content-type";
/**
* HTTP content disposition header name.
*/
public static final String CONTENT_DISPOSITION = "Content-disposition";
/**
* HTTP content length header name.
*/
public static final String CONTENT_LENGTH = "Content-length";
/**
* Content-disposition value for form data.
*/
public static final String FORM_DATA = "form-data";
/**
* Content-disposition value for file attachment.
*/
public static final String ATTACHMENT = "attachment";
/**
* Part of HTTP content type header.
*/
public static final String MULTIPART = "multipart/";
/**
* HTTP content type header for multipart forms.
*/
public static final String MULTIPART_FORM_DATA = "multipart/form-data";
/**
* HTTP content type header for multiple uploads.
*/
public static final String MULTIPART_MIXED = "multipart/mixed";
/**
* The maximum length of a single header line that will be parsed
* (1024 bytes).
* @deprecated This constant is no longer used. As of commons-fileupload
* 1.2, the only applicable limit is the total size of a parts headers,
* {@link MultipartStream#HEADER_PART_SIZE_MAX}.
*/
@Deprecated
public static final int MAX_HEADER_SIZE = 1024;
// ----------------------------------------------------------- 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;
/**
* The content encoding to use when reading part headers.
*/
private String headerEncoding;
/**
* The progress listener.
*/
private ProgressListener listener;
// ----------------------------------------------------- Property accessors
/**
* Returns the factory class used when creating file items.
*
* @return The factory class for new file items.
*/
public abstract FileItemFactory getFileItemFactory();
/**
* Sets the factory class to use when creating file items.
*
* @param factory The factory class for new file items.
*/
public abstract void setFileItemFactory(FileItemFactory factory);
/**
* Returns the maximum allowed size of a complete request, as opposed
* to {@link #getFileSizeMax()}.
*
* @return The maximum allowed size, in bytes. The default value of
* -1 indicates, that there is no limit.
*
* @see #setSizeMax(long)
*
*/
public long getSizeMax() {
return sizeMax;
}
/**
* Sets the maximum allowed size of a complete request, as opposed
* to {@link #setFileSizeMax(long)}.
*
* @param sizeMax The maximum allowed size, in bytes. The default value of
* -1 indicates, that there is no limit.
*
* @see #getSizeMax()
*
*/
public void setSizeMax(long sizeMax) {
this.sizeMax = sizeMax;
}
/**
* Returns the maximum allowed size of a single uploaded file,
* as opposed to {@link #getSizeMax()}.
*
* @see #setFileSizeMax(long)
* @return Maximum size of a single uploaded file.
*/
public long getFileSizeMax() {
return fileSizeMax;
}
/**
* Sets the maximum allowed size of a single uploaded file,
* as opposed to {@link #getSizeMax()}.
*
* @see #getFileSizeMax()
* @param fileSizeMax Maximum size of a single uploaded file.
*/
public void setFileSizeMax(long fileSizeMax) {
this.fileSizeMax = fileSizeMax;
}
/**
* Retrieves the character encoding used when reading the headers of an
* individual part. When not specified, or null, the request
* encoding is used. If that is also not specified, or null,
* the platform default encoding is used.
*
* @return The encoding used to read part headers.
*/
public String getHeaderEncoding() {
return headerEncoding;
}
/**
* Specifies the character encoding to be used when reading the headers of
* individual part. When not specified, or null, the request
* encoding is used. If that is also not specified, or null,
* the platform default encoding is used.
*
* @param encoding The encoding used to read part headers.
*/
public void setHeaderEncoding(String encoding) {
headerEncoding = encoding;
}
// --------------------------------------------------------- Public methods
/**
* Processes an RFC 1867
* compliant multipart/form-data stream.
*
* @param ctx The context for the request to be parsed.
*
* @return An iterator to instances of FileItemStream
* parsed from the request, in the order that they were
* transmitted.
*
* @throws FileUploadException if there are problems reading/parsing
* the request or storing files.
* @throws IOException An I/O error occurred. This may be a network
* error while communicating with the client or a problem while
* storing the uploaded content.
*/
public FileItemIterator getItemIterator(RequestContext ctx)
throws FileUploadException, IOException {
try {
return new FileItemIteratorImpl(ctx);
} catch (FileUploadIOException e) {
// unwrap encapsulated SizeException
throw (FileUploadException) e.getCause();
}
}
/**
* Processes an RFC 1867
* compliant multipart/form-data stream.
*
* @param ctx The context for the request to be parsed.
*
* @return A list of FileItem instances parsed from the
* request, in the order that they were transmitted.
*
* @throws FileUploadException if there are problems reading/parsing
* the request or storing files.
*/
public List parseRequest(RequestContext ctx)
throws FileUploadException {
List items = new ArrayList();
boolean successful = false;
try {
FileItemIterator iter = getItemIterator(ctx);
FileItemFactory fac = getFileItemFactory();
if (fac == null) {
throw new NullPointerException("No FileItemFactory has been set.");
}
while (iter.hasNext()) {
final FileItemStream item = iter.next();
// Don't use getName() here to prevent an InvalidFileNameException.
final String fileName = ((FileItemIteratorImpl.FileItemStreamImpl) item).name;
FileItem fileItem = fac.createItem(item.getFieldName(), item.getContentType(),
item.isFormField(), fileName);
items.add(fileItem);
try {
Streams.copy(item.openStream(), fileItem.getOutputStream(), true);
} catch (FileUploadIOException e) {
throw (FileUploadException) e.getCause();
} catch (IOException e) {
throw new IOFileUploadException(format("Processing of %s request failed. %s",
MULTIPART_FORM_DATA, e.getMessage()), e);
}
final FileItemHeaders fih = item.getHeaders();
fileItem.setHeaders(fih);
}
successful = true;
return items;
} catch (FileUploadIOException e) {
throw (FileUploadException) e.getCause();
} catch (IOException e) {
throw new FileUploadException(e.getMessage(), e);
} finally {
if (!successful) {
for (FileItem fileItem : items) {
try {
fileItem.delete();
} catch (Exception ignored) {
// ignored TODO perhaps add to tracker delete failure list somehow?
}
}
}
}
}
/**
* Processes an RFC 1867
* compliant multipart/form-data stream.
*
* @param ctx The context for the request to be parsed.
*
* @return A map of FileItem instances parsed from the request.
*
* @throws FileUploadException if there are problems reading/parsing
* the request or storing files.
*
* @since 1.3
*/
public Map> parseParameterMap(RequestContext ctx)
throws FileUploadException {
final List items = parseRequest(ctx);
final Map> itemsMap = new HashMap>(items.size());
for (FileItem fileItem : items) {
String fieldName = fileItem.getFieldName();
List mappedItems = itemsMap.get(fieldName);
if (mappedItems == null) {
mappedItems = new ArrayList();
itemsMap.put(fieldName, mappedItems);
}
mappedItems.add(fileItem);
}
return itemsMap;
}
// ------------------------------------------------------ Protected methods
/**
* Retrieves the boundary from the Content-type header.
*
* @param contentType The value of the content type header from which to
* extract the boundary value.
*
* @return The boundary, as a byte array.
*/
protected byte[] getBoundary(String contentType) {
ParameterParser parser = new ParameterParser();
parser.setLowerCaseNames(true);
// Parameter parser can handle null input
Map params = parser.parse(contentType, new char[] {';', ','});
String boundaryStr = params.get("boundary");
if (boundaryStr == null) {
return null;
}
byte[] boundary;
try {
boundary = boundaryStr.getBytes("ISO-8859-1");
} catch (UnsupportedEncodingException e) {
boundary = boundaryStr.getBytes(); // Intentionally falls back to default charset
}
return boundary;
}
/**
* Retrieves the file name from the Content-disposition
* header.
*
* @param headers A Map containing the HTTP request headers.
*
* @return The file name for the current encapsulation.
* @deprecated 1.2.1 Use {@link #getFileName(FileItemHeaders)}.
*/
@Deprecated
protected String getFileName(Map headers) {
return getFileName(getHeader(headers, CONTENT_DISPOSITION));
}
/**
* Retrieves the file name from the Content-disposition
* header.
*
* @param headers The HTTP headers object.
*
* @return The file name for the current encapsulation.
*/
protected String getFileName(FileItemHeaders headers) {
return getFileName(headers.getHeader(CONTENT_DISPOSITION));
}
/**
* Returns the given content-disposition headers file name.
* @param pContentDisposition The content-disposition headers value.
* @return The file name
*/
private String getFileName(String pContentDisposition) {
String fileName = null;
if (pContentDisposition != null) {
String cdl = pContentDisposition.toLowerCase(Locale.ENGLISH);
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(pContentDisposition, ';');
if (params.containsKey("filename")) {
fileName = params.get("filename");
if (fileName != null) {
fileName = fileName.trim();
} 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 Content-disposition
* header.
*
* @param headers A Map containing the HTTP request headers.
*
* @return The field name for the current encapsulation.
*/
protected String getFieldName(FileItemHeaders headers) {
return getFieldName(headers.getHeader(CONTENT_DISPOSITION));
}
/**
* Returns the field name, which is given by the content-disposition
* header.
* @param pContentDisposition The content-dispositions header value.
* @return The field jake
*/
private String getFieldName(String pContentDisposition) {
String fieldName = null;
if (pContentDisposition != null
&& pContentDisposition.toLowerCase(Locale.ENGLISH).startsWith(FORM_DATA)) {
ParameterParser parser = new ParameterParser();
parser.setLowerCaseNames(true);
// Parameter parser can handle null input
Map params = parser.parse(pContentDisposition, ';');
fieldName = params.get("name");
if (fieldName != null) {
fieldName = fieldName.trim();
}
}
return fieldName;
}
/**
* Retrieves the field name from the Content-disposition
* header.
*
* @param headers A Map containing the HTTP request headers.
*
* @return The field name for the current encapsulation.
* @deprecated 1.2.1 Use {@link #getFieldName(FileItemHeaders)}.
*/
@Deprecated
protected String getFieldName(Map headers) {
return getFieldName(getHeader(headers, CONTENT_DISPOSITION));
}
/**
* Creates a new {@link FileItem} instance.
*
* @param headers A Map containing the HTTP request
* headers.
* @param isFormField Whether or not this item is a form field, as
* opposed to a file.
*
* @return A newly created FileItem instance.
*
* @throws FileUploadException if an error occurs.
* @deprecated 1.2 This method is no longer used in favour of
* internally created instances of {@link FileItem}.
*/
@Deprecated
protected FileItem createItem(Map headers,
boolean isFormField)
throws FileUploadException {
return getFileItemFactory().createItem(getFieldName(headers),
getHeader(headers, CONTENT_TYPE),
isFormField,
getFileName(headers));
}
/**
* Parses the header-part and returns as key/value
* pairs.
*
*
If there are multiple headers of the same names, the name
* will map to a comma-separated list containing the values.
*
* @param headerPart The header-part of the current
* encapsulation.
*
* @return A Map containing the parsed HTTP request headers.
*/
protected FileItemHeaders getParsedHeaders(String headerPart) {
final int len = headerPart.length();
FileItemHeadersImpl headers = newFileItemHeaders();
int start = 0;
for (;;) {
int end = parseEndOfLine(headerPart, start);
if (start == end) {
break;
}
StringBuilder header = new StringBuilder(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.append(" ").append(headerPart.substring(nonWs, end));
start = end + 2;
}
parseHeaderLine(headers, header.toString());
}
return headers;
}
/**
* Creates a new instance of {@link FileItemHeaders}.
* @return The new instance.
*/
protected FileItemHeadersImpl newFileItemHeaders() {
return new FileItemHeadersImpl();
}
/**
*
Parses the header-part and returns as key/value
* pairs.
*
*
If there are multiple headers of the same names, the name
* will map to a comma-separated list containing the values.
*
* @param headerPart The header-part of the current
* encapsulation.
*
* @return A Map containing the parsed HTTP request headers.
* @deprecated 1.2.1 Use {@link #getParsedHeaders(String)}
*/
@Deprecated
protected Map parseHeaders(String headerPart) {
FileItemHeaders headers = getParsedHeaders(headerPart);
Map result = new HashMap();
for (Iterator iter = headers.getHeaderNames(); iter.hasNext();) {
String headerName = iter.next();
Iterator iter2 = headers.getHeaders(headerName);
StringBuilder headerValue = new StringBuilder(iter2.next());
while (iter2.hasNext()) {
headerValue.append(",").append(iter2.next());
}
result.put(headerName, headerValue.toString());
}
return result;
}
/**
* 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(FileItemHeadersImpl 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();
String headerValue =
header.substring(header.indexOf(':') + 1).trim();
headers.addHeader(headerName, headerValue);
}
/**
* Returns the header with the specified name from the supplied map. The
* header lookup is case-insensitive.
*
* @param headers A Map 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.
* @deprecated 1.2.1 Use {@link FileItemHeaders#getHeader(String)}.
*/
@Deprecated
protected final String getHeader(Map headers,
String name) {
return headers.get(name.toLowerCase(Locale.ENGLISH));
}
/**
* The iterator, which is returned by
* {@link FileUploadBase#getItemIterator(RequestContext)}.
*/
private class FileItemIteratorImpl implements FileItemIterator {
/**
* Default implementation of {@link FileItemStream}.
*/
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;
/**
* The headers, if any.
*/
private FileItemHeaders headers;
/**
* 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.
* @param pContentLength The items content length, if known, or -1
* @throws IOException Creating the file item failed.
*/
FileItemStreamImpl(String pName, String pFieldName,
String pContentType, boolean pFormField,
long pContentLength) throws IOException {
name = pName;
fieldName = pFieldName;
contentType = pContentType;
formField = pFormField;
if (fileSizeMax != -1) { // Check if limit is already exceeded
if (pContentLength != -1
&& pContentLength > fileSizeMax) {
FileSizeLimitExceededException e =
new FileSizeLimitExceededException(
format("The field %s exceeds its maximum permitted size of %s bytes.",
fieldName, Long.valueOf(fileSizeMax)),
pContentLength, fileSizeMax);
e.setFileName(pName);
e.setFieldName(pFieldName);
throw new FileUploadIOException(e);
}
}
// OK to construct stream now
final ItemInputStream itemStream = multi.newInputStream();
InputStream istream = itemStream;
if (fileSizeMax != -1) {
istream = new LimitedInputStream(istream, fileSizeMax) {
@Override
protected void raiseError(long pSizeMax, long pCount)
throws IOException {
itemStream.close(true);
FileSizeLimitExceededException e =
new FileSizeLimitExceededException(
format("The field %s exceeds its maximum permitted size of %s bytes.",
fieldName, Long.valueOf(pSizeMax)),
pCount, pSizeMax);
e.setFieldName(fieldName);
e.setFileName(name);
throw new FileUploadIOException(e);
}
};
}
stream = istream;
}
/**
* 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.
* @throws InvalidFileNameException The file name contains a NUL character,
* which might be an indicator of a security attack. If you intend to
* use the file name anyways, catch the exception and use
* InvalidFileNameException#getName().
*/
public String getName() {
return Streams.checkFileName(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();
}
/**
* Returns the file item headers.
*
* @return The items header object
*/
public FileItemHeaders getHeaders() {
return headers;
}
/**
* Sets the file item headers.
*
* @param pHeaders The items header object
*/
public void setHeaders(FileItemHeaders pHeaders) {
headers = pHeaders;
}
}
/**
* The multi part stream to process.
*/
private final MultipartStream multi;
/**
* The notifier, which used for triggering the
* {@link ProgressListener}.
*/
private final MultipartStream.ProgressNotifier notifier;
/**
* 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;
/**
* Creates a new instance.
*
* @param ctx The request context.
* @throws FileUploadException An error occurred while
* parsing the request.
* @throws IOException An I/O error occurred.
*/
FileItemIteratorImpl(RequestContext ctx)
throws FileUploadException, IOException {
if (ctx == null) {
throw new NullPointerException("ctx parameter");
}
String contentType = ctx.getContentType();
if ((null == contentType)
|| (!contentType.toLowerCase(Locale.ENGLISH).startsWith(MULTIPART))) {
throw new InvalidContentTypeException(
format("the request doesn't contain a %s or %s stream, content type header is %s",
MULTIPART_FORM_DATA, MULTIPART_MIXED, contentType));
}
@SuppressWarnings("deprecation") // still has to be backward compatible
final int contentLengthInt = ctx.getContentLength();
final long requestSize = UploadContext.class.isAssignableFrom(ctx.getClass())
// Inline conditional is OK here CHECKSTYLE:OFF
? ((UploadContext) ctx).contentLength()
: contentLengthInt;
// CHECKSTYLE:ON
InputStream input; // N.B. this is eventually closed in MultipartStream processing
if (sizeMax >= 0) {
if (requestSize != -1 && requestSize > sizeMax) {
throw new SizeLimitExceededException(
format("the request was rejected because its size (%s) exceeds the configured maximum (%s)",
Long.valueOf(requestSize), Long.valueOf(sizeMax)),
requestSize, sizeMax);
}
// N.B. this is eventually closed in MultipartStream processing
input = new LimitedInputStream(ctx.getInputStream(), sizeMax) {
@Override
protected void raiseError(long pSizeMax, long pCount)
throws IOException {
FileUploadException ex = new SizeLimitExceededException(
format("the request was rejected because its size (%s) exceeds the configured maximum (%s)",
Long.valueOf(pCount), Long.valueOf(pSizeMax)),
pCount, pSizeMax);
throw new FileUploadIOException(ex);
}
};
} else {
input = ctx.getInputStream();
}
String charEncoding = headerEncoding;
if (charEncoding == null) {
charEncoding = ctx.getCharacterEncoding();
}
boundary = getBoundary(contentType);
if (boundary == null) {
IOUtils.closeQuietly(input); // avoid possible resource leak
throw new FileUploadException("the request was rejected because no multipart boundary was found");
}
notifier = new MultipartStream.ProgressNotifier(listener, requestSize);
try {
multi = new MultipartStream(input, boundary, notifier);
} catch (IllegalArgumentException iae) {
IOUtils.closeQuietly(input); // avoid possible resource leak
throw new InvalidContentTypeException(
format("The boundary specified in the %s header is too long", CONTENT_TYPE), iae);
}
multi.setHeaderEncoding(charEncoding);
skipPreamble = true;
findNextItem();
}
/**
* Called for finding the next item, if any.
*
* @return True, if an next item was found, otherwise false.
* @throws IOException An I/O error occurred.
*/
private boolean findNextItem() throws IOException {
if (eof) {
return false;
}
if (currentItem != null) {
currentItem.close();
currentItem = null;
}
for (;;) {
boolean nextPart;
if (skipPreamble) {
nextPart = multi.skipPreamble();
} else {
nextPart = multi.readBoundary();
}
if (!nextPart) {
if (currentFieldName == null) {
// Outer multipart terminated -> No more data
eof = true;
return false;
}
// Inner multipart terminated -> Return to parsing the outer
multi.setBoundary(boundary);
currentFieldName = null;
continue;
}
FileItemHeaders headers = getParsedHeaders(multi.readHeaders());
if (currentFieldName == null) {
// We're parsing the outer multipart
String fieldName = getFieldName(headers);
if (fieldName != null) {
String subContentType = headers.getHeader(CONTENT_TYPE);
if (subContentType != null
&& subContentType.toLowerCase(Locale.ENGLISH)
.startsWith(MULTIPART_MIXED)) {
currentFieldName = fieldName;
// Multiple files associated with this field name
byte[] subBoundary = getBoundary(subContentType);
multi.setBoundary(subBoundary);
skipPreamble = true;
continue;
}
String fileName = getFileName(headers);
currentItem = new FileItemStreamImpl(fileName,
fieldName, headers.getHeader(CONTENT_TYPE),
fileName == null, getContentLength(headers));
currentItem.setHeaders(headers);
notifier.noteItem();
itemValid = true;
return true;
}
} else {
String fileName = getFileName(headers);
if (fileName != null) {
currentItem = new FileItemStreamImpl(fileName,
currentFieldName,
headers.getHeader(CONTENT_TYPE),
false, getContentLength(headers));
currentItem.setHeaders(headers);
notifier.noteItem();
itemValid = true;
return true;
}
}
multi.discardBodyData();
}
}
private long getContentLength(FileItemHeaders pHeaders) {
try {
return Long.parseLong(pHeaders.getHeader(CONTENT_LENGTH));
} catch (Exception e) {
return -1;
}
}
/**
* Returns, whether another instance of {@link FileItemStream}
* is available.
*
* @throws FileUploadException Parsing or processing the
* file item failed.
* @throws IOException Reading the file item failed.
* @return True, if one or more additional file items
* are available, otherwise false.
*/
public boolean hasNext() throws FileUploadException, IOException {
if (eof) {
return false;
}
if (itemValid) {
return true;
}
try {
return findNextItem();
} catch (FileUploadIOException e) {
// unwrap encapsulated SizeException
throw (FileUploadException) e.getCause();
}
}
/**
* Returns the next available {@link FileItemStream}.
*
* @throws java.util.NoSuchElementException No more items are
* available. Use {@link #hasNext()} to prevent this exception.
* @throws FileUploadException Parsing or processing the
* file item failed.
* @throws IOException Reading the file item failed.
* @return FileItemStream instance, which provides
* access to the next file item.
*/
public FileItemStream next() throws FileUploadException, IOException {
if (eof || (!itemValid && !hasNext())) {
throw new NoSuchElementException();
}
itemValid = false;
return currentItem;
}
}
/**
* This exception is thrown for hiding an inner
* {@link FileUploadException} in an {@link IOException}.
*/
public static class FileUploadIOException extends IOException {
/**
* The exceptions UID, for serializing an instance.
*/
private static final long serialVersionUID = -7047616958165584154L;
/**
* The exceptions cause; we overwrite the parent
* classes field, which is available since Java
* 1.4 only.
*/
private final FileUploadException cause;
/**
* Creates a FileUploadIOException with the
* given cause.
*
* @param pCause The exceptions cause, if any, or null.
*/
public FileUploadIOException(FileUploadException pCause) {
// We're not doing super(pCause) cause of 1.3 compatibility.
cause = pCause;
}
/**
* Returns the exceptions cause.
*
* @return The exceptions cause, if any, or null.
*/
@Override
public Throwable getCause() {
return cause;
}
}
/**
* Thrown to indicate that the request is not a multipart request.
*/
public static class InvalidContentTypeException
extends FileUploadException {
/**
* The exceptions UID, for serializing an instance.
*/
private static final long serialVersionUID = -9073026332015646668L;
/**
* Constructs a InvalidContentTypeException with no
* detail message.
*/
public InvalidContentTypeException() {
super();
}
/**
* Constructs an InvalidContentTypeException with
* the specified detail message.
*
* @param message The detail message.
*/
public InvalidContentTypeException(String message) {
super(message);
}
/**
* Constructs an InvalidContentTypeException with
* the specified detail message and cause.
*
* @param msg The detail message.
* @param cause the original cause
*
* @since 1.3.1
*/
public InvalidContentTypeException(String msg, Throwable cause) {
super(msg, cause);
}
}
/**
* Thrown to indicate an IOException.
*/
public static class IOFileUploadException extends FileUploadException {
/**
* The exceptions UID, for serializing an instance.
*/
private static final long serialVersionUID = 1749796615868477269L;
/**
* The exceptions cause; we overwrite the parent
* classes field, which is available since Java
* 1.4 only.
*/
private final IOException cause;
/**
* Creates a new instance with the given cause.
*
* @param pMsg The detail message.
* @param pException The exceptions cause.
*/
public IOFileUploadException(String pMsg, IOException pException) {
super(pMsg);
cause = pException;
}
/**
* Returns the exceptions cause.
*
* @return The exceptions cause, if any, or null.
*/
@Override
public Throwable getCause() {
return cause;
}
}
/**
* This exception is thrown, if a requests permitted size
* is exceeded.
*/
protected abstract static class SizeException extends FileUploadException {
/**
* Serial version UID, being used, if serialized.
*/
private static final long serialVersionUID = -8776225574705254126L;
/**
* The actual size of the request.
*/
private final long actual;
/**
* The maximum permitted size of the request.
*/
private final long permitted;
/**
* Creates a new instance.
*
* @param message The detail message.
* @param actual The actual number of bytes in the request.
* @param permitted The requests size limit, in bytes.
*/
protected SizeException(String message, long actual, long permitted) {
super(message);
this.actual = actual;
this.permitted = permitted;
}
/**
* Retrieves the actual size of the request.
*
* @return The actual size of the request.
* @since 1.3
*/
public long getActualSize() {
return actual;
}
/**
* Retrieves the permitted size of the request.
*
* @return The permitted size of the request.
* @since 1.3
*/
public long getPermittedSize() {
return permitted;
}
}
/**
* Thrown to indicate that the request size is not specified. In other
* words, it is thrown, if the content-length header is missing or
* contains the value -1.
*
* @deprecated 1.2 As of commons-fileupload 1.2, the presence of a
* content-length header is no longer required.
*/
@Deprecated
public static class UnknownSizeException
extends FileUploadException {
/**
* The exceptions UID, for serializing an instance.
*/
private static final long serialVersionUID = 7062279004812015273L;
/**
* Constructs a UnknownSizeException with no
* detail message.
*/
public UnknownSizeException() {
super();
}
/**
* Constructs an UnknownSizeException with
* the specified detail message.
*
* @param message The detail message.
*/
public UnknownSizeException(String message) {
super(message);
}
}
/**
* Thrown to indicate that the request size exceeds the configured maximum.
*/
public static class SizeLimitExceededException
extends SizeException {
/**
* The exceptions UID, for serializing an instance.
*/
private static final long serialVersionUID = -2474893167098052828L;
/**
* @deprecated 1.2 Replaced by
* {@link #SizeLimitExceededException(String, long, long)}
*/
@Deprecated
public SizeLimitExceededException() {
this(null, 0, 0);
}
/**
* @deprecated 1.2 Replaced by
* {@link #SizeLimitExceededException(String, long, long)}
* @param message The exceptions detail message.
*/
@Deprecated
public SizeLimitExceededException(String message) {
this(message, 0, 0);
}
/**
* Constructs a SizeExceededException with
* the specified detail message, and actual and permitted sizes.
*
* @param message The detail message.
* @param actual The actual request size.
* @param permitted The maximum permitted request size.
*/
public SizeLimitExceededException(String message, long actual,
long permitted) {
super(message, actual, permitted);
}
}
/**
* Thrown to indicate that A files size exceeds the configured maximum.
*/
public static class FileSizeLimitExceededException
extends SizeException {
/**
* The exceptions UID, for serializing an instance.
*/
private static final long serialVersionUID = 8150776562029630058L;
/**
* File name of the item, which caused the exception.
*/
private String fileName;
/**
* Field name of the item, which caused the exception.
*/
private String fieldName;
/**
* Constructs a SizeExceededException with
* the specified detail message, and actual and permitted sizes.
*
* @param message The detail message.
* @param actual The actual request size.
* @param permitted The maximum permitted request size.
*/
public FileSizeLimitExceededException(String message, long actual,
long permitted) {
super(message, actual, permitted);
}
/**
* Returns the file name of the item, which caused the
* exception.
*
* @return File name, if known, or null.
*/
public String getFileName() {
return fileName;
}
/**
* Sets the file name of the item, which caused the
* exception.
*
* @param pFileName the file name of the item, which caused the exception.
*/
public void setFileName(String pFileName) {
fileName = pFileName;
}
/**
* Returns the field name of the item, which caused the
* exception.
*
* @return Field name, if known, or null.
*/
public String getFieldName() {
return fieldName;
}
/**
* Sets the field name of the item, which caused the
* exception.
*
* @param pFieldName the field name of the item,
* which caused the exception.
*/
public void setFieldName(String pFieldName) {
fieldName = pFieldName;
}
}
/**
* Returns the progress listener.
*
* @return The progress listener, if any, or null.
*/
public ProgressListener getProgressListener() {
return listener;
}
/**
* Sets the progress listener.
*
* @param pListener The progress listener, if any. Defaults to null.
*/
public void setProgressListener(ProgressListener pListener) {
listener = pListener;
}
}