/*
* Copyright 2012 The Netty Project
*
* The Netty Project 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 com.facebook.presto.jdbc.internal.netty.handler.codec.http.multipart;
import com.facebook.presto.jdbc.internal.netty.buffer.ChannelBuffer;
import com.facebook.presto.jdbc.internal.netty.buffer.ChannelBuffers;
import com.facebook.presto.jdbc.internal.netty.handler.codec.http.DefaultHttpChunk;
import com.facebook.presto.jdbc.internal.netty.handler.codec.http.HttpChunk;
import com.facebook.presto.jdbc.internal.netty.handler.codec.http.HttpConstants;
import com.facebook.presto.jdbc.internal.netty.handler.codec.http.HttpHeaders;
import com.facebook.presto.jdbc.internal.netty.handler.codec.http.HttpMethod;
import com.facebook.presto.jdbc.internal.netty.handler.codec.http.HttpRequest;
import com.facebook.presto.jdbc.internal.netty.handler.stream.ChunkedInput;
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.ListIterator;
import java.util.Map;
import java.util.Random;
import java.util.regex.Pattern;
/**
* This encoder will help to encode Request for a FORM as POST.
*/
public class HttpPostRequestEncoder implements ChunkedInput {
/**
* Different modes to use to encode form data.
*/
public enum EncoderMode {
/**
* Legacy mode which should work for most. It is known to not work with OAUTH. For OAUTH use
* {@link EncoderMode#RFC3986}. The W3C form recommentations this for submitting post form data.
*/
RFC1738,
/**
* Mode which is more new and is used for OAUTH
*/
RFC3986
}
private static final Map<Pattern, String> percentEncodings = new HashMap<Pattern, String>();
static {
percentEncodings.put(Pattern.compile("\\*"), "%2A");
percentEncodings.put(Pattern.compile("\\+"), "%20");
percentEncodings.put(Pattern.compile("%7E"), "~");
}
/**
* Factory used to create InterfaceHttpData
*/
private final HttpDataFactory factory;
/**
* Request to encode
*/
private final HttpRequest request;
/**
* Default charset to use
*/
private final Charset charset;
/**
* Chunked false by default
*/
private boolean isChunked;
/**
* InterfaceHttpData for Body (without encoding)
*/
private final List<InterfaceHttpData> bodyListDatas;
/**
* The final Multipart List of InterfaceHttpData including encoding
*/
private final List<InterfaceHttpData> multipartHttpDatas;
/**
* Does this request is a Multipart request
*/
private final boolean isMultipart;
/**
* If multipart, this is the boundary for the flobal multipart
*/
private String multipartDataBoundary;
/**
* If multipart, there could be internal multiparts (mixed) to the global multipart.
* Only one level is allowed.
*/
private String multipartMixedBoundary;
/**
* To check if the header has been finalized
*/
private boolean headerFinalized;
private final EncoderMode encoderMode;
/**
*
* @param request the request to encode
* @param multipart True if the FORM is a ENCTYPE="multipart/form-data"
* @throws NullPointerException for request
* @throws ErrorDataEncoderException if the request is not a POST
*/
public HttpPostRequestEncoder(HttpRequest request, boolean multipart)
throws ErrorDataEncoderException {
this(new DefaultHttpDataFactory(DefaultHttpDataFactory.MINSIZE),
request, multipart, HttpConstants.DEFAULT_CHARSET);
}
/**
*
* @param factory the factory used to create InterfaceHttpData
* @param request the request to encode
* @param multipart True if the FORM is a ENCTYPE="multipart/form-data"
* @throws NullPointerException for request and factory
* @throws ErrorDataEncoderException if the request is not a POST
*/
public HttpPostRequestEncoder(HttpDataFactory factory, HttpRequest request, boolean multipart)
throws ErrorDataEncoderException {
this(factory, request, multipart, HttpConstants.DEFAULT_CHARSET);
}
/**
*
* @param factory the factory used to create InterfaceHttpData
* @param request the request to encode
* @param multipart True if the FORM is a ENCTYPE="multipart/form-data"
* @param charset the charset to use as default
* @throws NullPointerException for request or charset or factory
* @throws ErrorDataEncoderException if the request is not a POST
*/
public HttpPostRequestEncoder(HttpDataFactory factory, HttpRequest request,
boolean multipart, Charset charset) throws ErrorDataEncoderException {
this(factory, request, multipart, charset, EncoderMode.RFC1738);
}
/**
*
* @param factory the factory used to create InterfaceHttpData
* @param request the request to encode
* @param multipart True if the FORM is a ENCTYPE="multipart/form-data"
* @param charset the charset to use as default
+ @param encoderMode the mode for the encoder to use. See {@link EncoderMode} for the details.
* @throws NullPointerException for request or charset or factory
* @throws ErrorDataEncoderException if the request is not a POST
*/
public HttpPostRequestEncoder(HttpDataFactory factory, HttpRequest request, boolean multipart,
Charset charset, EncoderMode encoderMode) throws ErrorDataEncoderException {
if (factory == null) {
throw new NullPointerException("factory");
}
if (request == null) {
throw new NullPointerException("request");
}
if (charset == null) {
throw new NullPointerException("charset");
}
if (request.getMethod() != HttpMethod.POST) {
throw new ErrorDataEncoderException("Cannot create a Encoder if not a POST");
}
this.request = request;
this.charset = charset;
this.factory = factory;
this.encoderMode = encoderMode;
// Fill default values
bodyListDatas = new ArrayList<InterfaceHttpData>();
// default mode
isLastChunk = false;
isLastChunkSent = false;
isMultipart = multipart;
multipartHttpDatas = new ArrayList<InterfaceHttpData>();
if (isMultipart) {
initDataMultipart();
}
}
/**
* Clean all HttpDatas (on Disk) for the current request.
*/
public void cleanFiles() {
factory.cleanRequestHttpDatas(request);
}
/**
* Does the last non empty chunk already encoded so that next chunk will be empty (last chunk)
*/
private boolean isLastChunk;
/**
* Last chunk already sent
*/
private boolean isLastChunkSent;
/**
* The current FileUpload that is currently in encode process
*/
private FileUpload currentFileUpload;
/**
* While adding a FileUpload, is the multipart currently in Mixed Mode
*/
private boolean duringMixedMode;
/**
* Global Body size
*/
private long globalBodySize;
/**
* True if this request is a Multipart request
* @return True if this request is a Multipart request
*/
public boolean isMultipart() {
return isMultipart;
}
/**
* Init the delimiter for Global Part (Data).
*/
private void initDataMultipart() {
multipartDataBoundary = getNewMultipartDelimiter();
}
/**
* Init the delimiter for Mixed Part (Mixed).
*/
private void initMixedMultipart() {
multipartMixedBoundary = getNewMultipartDelimiter();
}
/**
*
* @return a newly generated Delimiter (either for DATA or MIXED)
*/
private static String getNewMultipartDelimiter() {
// construct a generated delimiter
Random random = new Random();
return Long.toHexString(random.nextLong()).toLowerCase();
}
/**
* This method returns a List of all InterfaceHttpData from body part.<br>
* @return the list of InterfaceHttpData from Body part
*/
public List<InterfaceHttpData> getBodyListAttributes() {
return bodyListDatas;
}
/**
* Set the Body HttpDatas list
* @throws NullPointerException for datas
* @throws ErrorDataEncoderException if the encoding is in error or if the finalize were already done
*/
public void setBodyHttpDatas(List<InterfaceHttpData> datas)
throws ErrorDataEncoderException {
if (datas == null) {
throw new NullPointerException("datas");
}
globalBodySize = 0;
bodyListDatas.clear();
currentFileUpload = null;
duringMixedMode = false;
multipartHttpDatas.clear();
for (InterfaceHttpData data: datas) {
addBodyHttpData(data);
}
}
/**
* Add a simple attribute in the body as Name=Value
* @param name name of the parameter
* @param value the value of the parameter
* @throws NullPointerException for name
* @throws ErrorDataEncoderException if the encoding is in error or if the finalize were already done
*/
public void addBodyAttribute(String name, String value)
throws ErrorDataEncoderException {
if (name == null) {
throw new NullPointerException("name");
}
String svalue = value;
if (value == null) {
svalue = "";
}
Attribute data = factory.createAttribute(request, name, svalue);
addBodyHttpData(data);
}
/**
* Add a file as a FileUpload
* @param name the name of the parameter
* @param file the file to be uploaded (if not Multipart mode, only the filename will be included)
* @param contentType the associated contentType for the File
* @param isText True if this file should be transmitted in Text format (else binary)
* @throws NullPointerException for name and file
* @throws ErrorDataEncoderException if the encoding is in error or if the finalize were already done
*/
public void addBodyFileUpload(String name, File file, String contentType, boolean isText)
throws ErrorDataEncoderException {
if (name == null) {
throw new NullPointerException("name");
}
if (file == null) {
throw new NullPointerException("file");
}
String scontentType = contentType;
String contentTransferEncoding = null;
if (contentType == null) {
if (isText) {
scontentType = HttpPostBodyUtil.DEFAULT_TEXT_CONTENT_TYPE;
} else {
scontentType = HttpPostBodyUtil.DEFAULT_BINARY_CONTENT_TYPE;
}
}
if (!isText) {
contentTransferEncoding = HttpPostBodyUtil.TransferEncodingMechanism.BINARY.value();
}
FileUpload fileUpload = factory.createFileUpload(request, name, file.getName(),
scontentType, contentTransferEncoding, null, file.length());
try {
fileUpload.setContent(file);
} catch (IOException e) {
throw new ErrorDataEncoderException(e);
}
addBodyHttpData(fileUpload);
}
/**
* Add a series of Files associated with one File parameter (implied Mixed mode in Multipart)
* @param name the name of the parameter
* @param file the array of files
* @param contentType the array of content Types associated with each file
* @param isText the array of isText attribute (False meaning binary mode) for each file
* @throws NullPointerException also throws if array have different sizes
* @throws ErrorDataEncoderException if the encoding is in error or if the finalize were already done
*/
public void addBodyFileUploads(String name, File[] file, String[] contentType, boolean[] isText)
throws ErrorDataEncoderException {
if (file.length != contentType.length && file.length != isText.length) {
throw new NullPointerException("Different array length");
}
for (int i = 0; i < file.length; i++) {
addBodyFileUpload(name, file[i], contentType[i], isText[i]);
}
}
/**
* Add the InterfaceHttpData to the Body list
* @throws NullPointerException for data
* @throws ErrorDataEncoderException if the encoding is in error or if the finalize were already done
*/
public void addBodyHttpData(InterfaceHttpData data)
throws ErrorDataEncoderException {
if (headerFinalized) {
throw new ErrorDataEncoderException("Cannot add value once finalized");
}
if (data == null) {
throw new NullPointerException("data");
}
bodyListDatas.add(data);
if (! isMultipart) {
if (data instanceof Attribute) {
Attribute attribute = (Attribute) data;
try {
// name=value& with encoded name and attribute
String key = encodeAttribute(attribute.getName(), charset);
String value = encodeAttribute(attribute.getValue(), charset);
Attribute newattribute = factory.createAttribute(request, key, value);
multipartHttpDatas.add(newattribute);
globalBodySize += newattribute.getName().length() + 1 +
newattribute.length() + 1;
} catch (IOException e) {
throw new ErrorDataEncoderException(e);
}
} else if (data instanceof FileUpload) {
// since not Multipart, only name=filename => Attribute
FileUpload fileUpload = (FileUpload) data;
// name=filename& with encoded name and filename
String key = encodeAttribute(fileUpload.getName(), charset);
String value = encodeAttribute(fileUpload.getFilename(), charset);
Attribute newattribute = factory.createAttribute(request, key, value);
multipartHttpDatas.add(newattribute);
globalBodySize += newattribute.getName().length() + 1 +
newattribute.length() + 1;
}
return;
}
/*
* Logic:
* if not Attribute:
* add Data to body list
* if (duringMixedMode)
* add endmixedmultipart delimiter
* currentFileUpload = null
* duringMixedMode = false;
* add multipart delimiter, multipart body header and Data to multipart list
* reset currentFileUpload, duringMixedMode
* if FileUpload: take care of multiple file for one field => mixed mode
* if (duringMixeMode)
* if (currentFileUpload.name == data.name)
* add mixedmultipart delimiter, mixedmultipart body header and Data to multipart list
* else
* add endmixedmultipart delimiter, multipart body header and Data to multipart list
* currentFileUpload = data
* duringMixedMode = false;
* else
* if (currentFileUpload.name == data.name)
* change multipart body header of previous file into multipart list to
* mixedmultipart start, mixedmultipart body header
* add mixedmultipart delimiter, mixedmultipart body header and Data to multipart list
* duringMixedMode = true
* else
* add multipart delimiter, multipart body header and Data to multipart list
* currentFileUpload = data
* duringMixedMode = false;
* Do not add last delimiter! Could be:
* if duringmixedmode: endmixedmultipart + endmultipart
* else only endmultipart
*/
if (data instanceof Attribute) {
if (duringMixedMode) {
InternalAttribute internal = new InternalAttribute(charset);
internal.addValue("\r\n--" + multipartMixedBoundary + "--");
multipartHttpDatas.add(internal);
multipartMixedBoundary = null;
currentFileUpload = null;
duringMixedMode = false;
}
InternalAttribute internal = new InternalAttribute(charset);
if (!multipartHttpDatas.isEmpty()) {
// previously a data field so CRLF
internal.addValue("\r\n");
}
internal.addValue("--" + multipartDataBoundary + "\r\n");
// content-disposition: form-data; name="field1"
Attribute attribute = (Attribute) data;
internal.addValue(HttpPostBodyUtil.CONTENT_DISPOSITION + ": " +
HttpPostBodyUtil.FORM_DATA + "; " +
HttpPostBodyUtil.NAME + "=\"" + attribute.getName() + "\"\r\n");
Charset localcharset = attribute.getCharset();
if (localcharset != null) {
// Content-Type: charset=charset
internal.addValue(HttpHeaders.Names.CONTENT_TYPE + ": " +
HttpPostBodyUtil.DEFAULT_TEXT_CONTENT_TYPE + "; " +
HttpHeaders.Values.CHARSET + '=' + localcharset + "\r\n");
}
// CRLF between body header and data
internal.addValue("\r\n");
multipartHttpDatas.add(internal);
multipartHttpDatas.add(data);
globalBodySize += attribute.length() + internal.size();
} else if (data instanceof FileUpload) {
FileUpload fileUpload = (FileUpload) data;
InternalAttribute internal = new InternalAttribute(charset);
if (!multipartHttpDatas.isEmpty()) {
// previously a data field so CRLF
internal.addValue("\r\n");
}
boolean localMixed;
if (duringMixedMode) {
if (currentFileUpload != null &&
currentFileUpload.getName().equals(fileUpload.getName())) {
// continue a mixed mode
localMixed = true;
} else {
// end a mixed mode
// add endmixedmultipart delimiter, multipart body header and
// Data to multipart list
internal.addValue("--" + multipartMixedBoundary + "--");
multipartHttpDatas.add(internal);
multipartMixedBoundary = null;
// start a new one (could be replaced if mixed start again from here
internal = new InternalAttribute(charset);
internal.addValue("\r\n");
localMixed = false;
// new currentFileUpload and no more in Mixed mode
currentFileUpload = fileUpload;
duringMixedMode = false;
}
} else {
if (currentFileUpload != null &&
currentFileUpload.getName().equals(fileUpload.getName())) {
// create a new mixed mode (from previous file)
// change multipart body header of previous file into multipart list to
// mixedmultipart start, mixedmultipart body header
// change Internal (size()-2 position in multipartHttpDatas)
// from (line starting with *)
// --AaB03x
// * Content-Disposition: form-data; name="files"; filename="file1.txt"
// Content-Type: text/plain
// to (lines starting with *)
// --AaB03x
// * Content-Disposition: form-data; name="files"
// * Content-Type: multipart/mixed; boundary=BbC04y
// *
// * --BbC04y
// * Content-Disposition: file; filename="file1.txt"
// Content-Type: text/plain
initMixedMultipart();
InternalAttribute pastAttribute =
(InternalAttribute) multipartHttpDatas.get(multipartHttpDatas.size() - 2);
// remove past size
globalBodySize -= pastAttribute.size();
String replacement = HttpPostBodyUtil.CONTENT_DISPOSITION + ": " +
HttpPostBodyUtil.FORM_DATA + "; " + HttpPostBodyUtil.NAME + "=\"" +
fileUpload.getName() + "\"\r\n";
replacement += HttpHeaders.Names.CONTENT_TYPE + ": " +
HttpPostBodyUtil.MULTIPART_MIXED + "; " + HttpHeaders.Values.BOUNDARY +
'=' + multipartMixedBoundary + "\r\n\r\n";
replacement += "--" + multipartMixedBoundary + "\r\n";
replacement += HttpPostBodyUtil.CONTENT_DISPOSITION + ": " +
HttpPostBodyUtil.FILE + "; " + HttpPostBodyUtil.FILENAME + "=\"" +
fileUpload.getFilename() + "\"\r\n";
pastAttribute.setValue(replacement, 1);
// update past size
globalBodySize += pastAttribute.size();
// now continue
// add mixedmultipart delimiter, mixedmultipart body header and
// Data to multipart list
localMixed = true;
duringMixedMode = true;
} else {
// a simple new multipart
//add multipart delimiter, multipart body header and Data to multipart list
localMixed = false;
currentFileUpload = fileUpload;
duringMixedMode = false;
}
}
if (localMixed) {
// add mixedmultipart delimiter, mixedmultipart body header and
// Data to multipart list
internal.addValue("--" + multipartMixedBoundary + "\r\n");
// Content-Disposition: file; filename="file1.txt"
internal.addValue(HttpPostBodyUtil.CONTENT_DISPOSITION + ": " +
HttpPostBodyUtil.FILE + "; " + HttpPostBodyUtil.FILENAME + "=\"" +
fileUpload.getFilename() +
"\"\r\n");
} else {
internal.addValue("--" + multipartDataBoundary + "\r\n");
// Content-Disposition: form-data; name="files"; filename="file1.txt"
internal.addValue(HttpPostBodyUtil.CONTENT_DISPOSITION + ": " +
HttpPostBodyUtil.FORM_DATA + "; " + HttpPostBodyUtil.NAME + "=\"" +
fileUpload.getName() + "\"; " +
HttpPostBodyUtil.FILENAME + "=\"" +
fileUpload.getFilename() +
"\"\r\n");
}
// Content-Type: image/gif
// Content-Type: text/plain; charset=ISO-8859-1
// Content-Transfer-Encoding: binary
internal.addValue(HttpHeaders.Names.CONTENT_TYPE + ": " +
fileUpload.getContentType());
String contentTransferEncoding = fileUpload.getContentTransferEncoding();
if (contentTransferEncoding != null &&
contentTransferEncoding.equals(
HttpPostBodyUtil.TransferEncodingMechanism.BINARY.value())) {
internal.addValue("\r\n" + HttpHeaders.Names.CONTENT_TRANSFER_ENCODING +
": " + HttpPostBodyUtil.TransferEncodingMechanism.BINARY.value() +
"\r\n\r\n");
} else if (fileUpload.getCharset() != null) {
internal.addValue("; " + HttpHeaders.Values.CHARSET + '=' +
fileUpload.getCharset() + "\r\n\r\n");
} else {
internal.addValue("\r\n\r\n");
}
multipartHttpDatas.add(internal);
multipartHttpDatas.add(data);
globalBodySize += fileUpload.length() + internal.size();
}
}
/**
* Iterator to be used when encoding will be called chunk after chunk
*/
private ListIterator<InterfaceHttpData> iterator;
/**
* Finalize the request by preparing the Header in the request and
* returns the request ready to be sent.<br>
* Once finalized, no data must be added.<br>
* If the request does not need chunk (isChunked() == false),
* this request is the only object to send to
* the remote server.
*
* @return the request object (chunked or not according to size of body)
* @throws ErrorDataEncoderException if the encoding is in error or if the finalize were already done
*/
public HttpRequest finalizeRequest() throws ErrorDataEncoderException {
// Finalize the multipartHttpDatas
if (! headerFinalized) {
if (isMultipart) {
InternalAttribute internal = new InternalAttribute(charset);
if (duringMixedMode) {
internal.addValue("\r\n--" + multipartMixedBoundary + "--");
}
internal.addValue("\r\n--" + multipartDataBoundary + "--\r\n");
multipartHttpDatas.add(internal);
multipartMixedBoundary = null;
currentFileUpload = null;
duringMixedMode = false;
globalBodySize += internal.size();
}
headerFinalized = true;
} else {
throw new ErrorDataEncoderException("Header already encoded");
}
List<String> contentTypes = request.getHeaders(HttpHeaders.Names.CONTENT_TYPE);
List<String> transferEncoding =
request.getHeaders(HttpHeaders.Names.TRANSFER_ENCODING);
if (contentTypes != null) {
request.removeHeader(HttpHeaders.Names.CONTENT_TYPE);
for (String contentType: contentTypes) {
// "multipart/form-data; boundary=--89421926422648"
if (contentType.toLowerCase().startsWith(
HttpHeaders.Values.MULTIPART_FORM_DATA)) {
// ignore
} else if (contentType.toLowerCase().startsWith(
HttpHeaders.Values.APPLICATION_X_WWW_FORM_URLENCODED)) {
// ignore
} else {
request.addHeader(HttpHeaders.Names.CONTENT_TYPE, contentType);
}
}
}
if (isMultipart) {
String value = HttpHeaders.Values.MULTIPART_FORM_DATA + "; " +
HttpHeaders.Values.BOUNDARY + '=' + multipartDataBoundary;
request.addHeader(HttpHeaders.Names.CONTENT_TYPE, value);
} else {
// Not multipart
request.addHeader(HttpHeaders.Names.CONTENT_TYPE,
HttpHeaders.Values.APPLICATION_X_WWW_FORM_URLENCODED);
}
// Now consider size for chunk or not
long realSize = globalBodySize;
if (isMultipart) {
iterator = multipartHttpDatas.listIterator();
} else {
realSize -= 1; // last '&' removed
iterator = multipartHttpDatas.listIterator();
}
request.setHeader(HttpHeaders.Names.CONTENT_LENGTH, String
.valueOf(realSize));
if (realSize > HttpPostBodyUtil.chunkSize || isMultipart) {
isChunked = true;
if (transferEncoding != null) {
request.removeHeader(HttpHeaders.Names.TRANSFER_ENCODING);
for (String v: transferEncoding) {
if (v.equalsIgnoreCase(HttpHeaders.Values.CHUNKED)) {
// ignore
} else {
request.addHeader(HttpHeaders.Names.TRANSFER_ENCODING, v);
}
}
}
request.addHeader(HttpHeaders.Names.TRANSFER_ENCODING,
HttpHeaders.Values.CHUNKED);
request.setContent(ChannelBuffers.EMPTY_BUFFER);
} else {
// get the only one body and set it to the request
HttpChunk chunk = nextChunk();
request.setContent(chunk.getContent());
}
return request;
}
/**
* @return True if the request is by Chunk
*/
public boolean isChunked() {
return isChunked;
}
/**
* Encode one attribute
* @return the encoded attribute
* @throws ErrorDataEncoderException if the encoding is in error
*/
private String encodeAttribute(String s, Charset charset)
throws ErrorDataEncoderException {
if (s == null) {
return "";
}
try {
String encoded = URLEncoder.encode(s, charset.name());
if (encoderMode == EncoderMode.RFC3986) {
for (Map.Entry<Pattern, String> entry : percentEncodings.entrySet()) {
String replacement = entry.getValue();
encoded = entry.getKey().matcher(encoded).replaceAll(replacement);
}
}
return encoded;
} catch (UnsupportedEncodingException e) {
throw new ErrorDataEncoderException(charset.name(), e);
}
}
/**
* The ChannelBuffer currently used by the encoder
*/
private ChannelBuffer currentBuffer;
/**
* The current InterfaceHttpData to encode (used if more chunks are available)
*/
private InterfaceHttpData currentData;
/**
* If not multipart, does the currentBuffer stands for the Key or for the Value
*/
private boolean isKey = true;
/**
*
* @return the next ChannelBuffer to send as a HttpChunk and modifying currentBuffer
* accordingly
*/
private ChannelBuffer fillChannelBuffer() {
int length = currentBuffer.readableBytes();
if (length > HttpPostBodyUtil.chunkSize) {
ChannelBuffer slice =
currentBuffer.slice(currentBuffer.readerIndex(), HttpPostBodyUtil.chunkSize);
currentBuffer.skipBytes(HttpPostBodyUtil.chunkSize);
return slice;
} else {
// to continue
ChannelBuffer slice = currentBuffer;
currentBuffer = null;
return slice;
}
}
/**
* From the current context (currentBuffer and currentData), returns the next HttpChunk
* (if possible) trying to get sizeleft bytes more into the currentBuffer.
* This is the Multipart version.
*
* @param sizeleft the number of bytes to try to get from currentData
* @return the next HttpChunk or null if not enough bytes were found
* @throws ErrorDataEncoderException if the encoding is in error
*/
private HttpChunk encodeNextChunkMultipart(int sizeleft) throws ErrorDataEncoderException {
if (currentData == null) {
return null;
}
ChannelBuffer buffer;
if (currentData instanceof InternalAttribute) {
buffer = ((InternalAttribute) currentData).toChannelBuffer();
currentData = null;
} else {
if (currentData instanceof Attribute) {
try {
buffer = ((Attribute) currentData).getChunk(sizeleft);
} catch (IOException e) {
throw new ErrorDataEncoderException(e);
}
} else {
try {
buffer = ((HttpData) currentData).getChunk(sizeleft);
} catch (IOException e) {
throw new ErrorDataEncoderException(e);
}
}
if (buffer.capacity() == 0) {
// end for current InterfaceHttpData, need more data
currentData = null;
return null;
}
}
if (currentBuffer == null) {
currentBuffer = buffer;
} else {
currentBuffer = ChannelBuffers.wrappedBuffer(currentBuffer,
buffer);
}
if (currentBuffer.readableBytes() < HttpPostBodyUtil.chunkSize) {
currentData = null;
return null;
}
buffer = fillChannelBuffer();
return new DefaultHttpChunk(buffer);
}
/**
* From the current context (currentBuffer and currentData), returns the next HttpChunk
* (if possible) trying to get sizeleft bytes more into the currentBuffer.
* This is the UrlEncoded version.
*
* @param sizeleft the number of bytes to try to get from currentData
* @return the next HttpChunk or null if not enough bytes were found
* @throws ErrorDataEncoderException if the encoding is in error
*/
private HttpChunk encodeNextChunkUrlEncoded(int sizeleft) throws ErrorDataEncoderException {
if (currentData == null) {
return null;
}
int size = sizeleft;
ChannelBuffer buffer;
if (isKey) {
// get name
String key = currentData.getName();
buffer = ChannelBuffers.wrappedBuffer(key.getBytes());
isKey = false;
if (currentBuffer == null) {
currentBuffer = ChannelBuffers.wrappedBuffer(
buffer, ChannelBuffers.wrappedBuffer("=".getBytes()));
//continue
size -= buffer.readableBytes() + 1;
} else {
currentBuffer = ChannelBuffers.wrappedBuffer(currentBuffer,
buffer, ChannelBuffers.wrappedBuffer("=".getBytes()));
//continue
size -= buffer.readableBytes() + 1;
}
if (currentBuffer.readableBytes() >= HttpPostBodyUtil.chunkSize) {
buffer = fillChannelBuffer();
return new DefaultHttpChunk(buffer);
}
}
try {
buffer = ((HttpData) currentData).getChunk(size);
} catch (IOException e) {
throw new ErrorDataEncoderException(e);
}
ChannelBuffer delimiter = null;
if (buffer.readableBytes() < size) {
// delimiter
isKey = true;
delimiter = iterator.hasNext() ?
ChannelBuffers.wrappedBuffer("&".getBytes()) :
null;
}
if (buffer.capacity() == 0) {
// end for current InterfaceHttpData, need potentially more data
currentData = null;
if (currentBuffer == null) {
currentBuffer = delimiter;
} else {
if (delimiter != null) {
currentBuffer = ChannelBuffers.wrappedBuffer(currentBuffer,
delimiter);
}
}
if (currentBuffer.readableBytes() >= HttpPostBodyUtil.chunkSize) {
buffer = fillChannelBuffer();
return new DefaultHttpChunk(buffer);
}
return null;
}
if (currentBuffer == null) {
if (delimiter != null) {
currentBuffer = ChannelBuffers.wrappedBuffer(buffer,
delimiter);
} else {
currentBuffer = buffer;
}
} else {
if (delimiter != null) {
currentBuffer = ChannelBuffers.wrappedBuffer(currentBuffer,
buffer, delimiter);
} else {
currentBuffer = ChannelBuffers.wrappedBuffer(currentBuffer,
buffer);
}
}
if (currentBuffer.readableBytes() < HttpPostBodyUtil.chunkSize) {
// end for current InterfaceHttpData, need more data
currentData = null;
isKey = true;
return null;
}
buffer = fillChannelBuffer();
// size = 0
return new DefaultHttpChunk(buffer);
}
public void close() throws Exception {
//NO since the user can want to reuse (broadcast for instance) cleanFiles();
}
/**
* Returns the next available HttpChunk. The caller is responsible to test if this chunk is the
* last one (isLast()), in order to stop calling this method.
*
* @return the next available HttpChunk
* @throws ErrorDataEncoderException if the encoding is in error
*/
public HttpChunk nextChunk() throws ErrorDataEncoderException {
if (isLastChunk) {
isLastChunkSent = true;
return new DefaultHttpChunk(ChannelBuffers.EMPTY_BUFFER);
}
ChannelBuffer buffer;
int size = HttpPostBodyUtil.chunkSize;
// first test if previous buffer is not empty
if (currentBuffer != null) {
size -= currentBuffer.readableBytes();
}
if (size <= 0) {
//NextChunk from buffer
buffer = fillChannelBuffer();
return new DefaultHttpChunk(buffer);
}
// size > 0
if (currentData != null) {
// continue to read data
if (isMultipart) {
HttpChunk chunk = encodeNextChunkMultipart(size);
if (chunk != null) {
return chunk;
}
} else {
HttpChunk chunk = encodeNextChunkUrlEncoded(size);
if (chunk != null) {
//NextChunk Url from currentData
return chunk;
}
}
size = HttpPostBodyUtil.chunkSize - currentBuffer.readableBytes();
}
if (! iterator.hasNext()) {
isLastChunk = true;
//NextChunk as last non empty from buffer
buffer = currentBuffer;
currentBuffer = null;
return new DefaultHttpChunk(buffer);
}
while (size > 0 && iterator.hasNext()) {
currentData = iterator.next();
HttpChunk chunk;
if (isMultipart) {
chunk = encodeNextChunkMultipart(size);
} else {
chunk = encodeNextChunkUrlEncoded(size);
}
if (chunk == null) {
// not enough
size = HttpPostBodyUtil.chunkSize - currentBuffer.readableBytes();
continue;
}
//NextChunk from data
return chunk;
}
// end since no more data
isLastChunk = true;
if (currentBuffer == null) {
isLastChunkSent = true;
//LastChunk with no more data
return new DefaultHttpChunk(ChannelBuffers.EMPTY_BUFFER);
}
//Previous LastChunk with no more data
buffer = currentBuffer;
currentBuffer = null;
return new DefaultHttpChunk(buffer);
}
public boolean isEndOfInput() throws Exception {
return isLastChunkSent;
}
public boolean hasNextChunk() throws Exception {
return !isLastChunkSent;
}
/**
* Exception when an error occurs while encoding
*/
public static class ErrorDataEncoderException extends Exception {
private static final long serialVersionUID = 5020247425493164465L;
public ErrorDataEncoderException() {
}
public ErrorDataEncoderException(String msg) {
super(msg);
}
public ErrorDataEncoderException(Throwable cause) {
super(cause);
}
public ErrorDataEncoderException(String msg, Throwable cause) {
super(msg, cause);
}
}
}