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/*
* 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.coyote.http11;
import java.io.EOFException;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import org.apache.coyote.InputBuffer;
import org.apache.coyote.Request;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.buf.ByteChunk;
import org.apache.tomcat.util.buf.MessageBytes;
import org.apache.tomcat.util.http.MimeHeaders;
import org.apache.tomcat.util.http.parser.HttpParser;
import org.apache.tomcat.util.net.ApplicationBufferHandler;
import org.apache.tomcat.util.net.SocketWrapperBase;
import org.apache.tomcat.util.res.StringManager;
/**
* InputBuffer for HTTP that provides request header parsing as well as transfer
* encoding.
*/
public class Http11InputBuffer implements InputBuffer, ApplicationBufferHandler {
// -------------------------------------------------------------- Constants
private static final Log log = LogFactory.getLog(Http11InputBuffer.class);
/**
* The string manager for this package.
*/
private static final StringManager sm = StringManager.getManager(Http11InputBuffer.class);
private static final byte[] CLIENT_PREFACE_START =
"PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n".getBytes(StandardCharsets.ISO_8859_1);
/**
* Associated Coyote request.
*/
private final Request request;
/**
* Headers of the associated request.
*/
private final MimeHeaders headers;
/**
* State.
*/
private boolean parsingHeader;
/**
* Swallow input ? (in the case of an expectation)
*/
private boolean swallowInput;
/**
* The read buffer.
*/
private ByteBuffer byteBuffer;
/**
* Pos of the end of the header in the buffer, which is also the
* start of the body.
*/
private int end;
/**
* Wrapper that provides access to the underlying socket.
*/
private SocketWrapperBase wrapper;
/**
* Underlying input buffer.
*/
private InputBuffer inputStreamInputBuffer;
/**
* Filter library.
* Note: Filter[Constants.CHUNKED_FILTER] is always the "chunked" filter.
*/
private InputFilter[] filterLibrary;
/**
* Active filters (in order).
*/
private InputFilter[] activeFilters;
/**
* Index of the last active filter.
*/
private int lastActiveFilter;
/**
* Parsing state - used for non blocking parsing so that
* when more data arrives, we can pick up where we left off.
*/
private boolean parsingRequestLine;
private int parsingRequestLinePhase = 0;
private boolean parsingRequestLineEol = false;
private int parsingRequestLineStart = 0;
private int parsingRequestLineQPos = -1;
private HeaderParsePosition headerParsePos;
private final HeaderParseData headerData = new HeaderParseData();
/**
* Maximum allowed size of the HTTP request line plus headers plus any
* leading blank lines.
*/
private final int headerBufferSize;
/**
* Known size of the NioChannel read buffer.
*/
private int socketReadBufferSize;
// ----------------------------------------------------------- Constructors
public Http11InputBuffer(Request request, int headerBufferSize) {
this.request = request;
headers = request.getMimeHeaders();
this.headerBufferSize = headerBufferSize;
filterLibrary = new InputFilter[0];
activeFilters = new InputFilter[0];
lastActiveFilter = -1;
parsingHeader = true;
parsingRequestLine = true;
parsingRequestLinePhase = 0;
parsingRequestLineEol = false;
parsingRequestLineStart = 0;
parsingRequestLineQPos = -1;
headerParsePos = HeaderParsePosition.HEADER_START;
swallowInput = true;
inputStreamInputBuffer = new SocketInputBuffer();
}
// ------------------------------------------------------------- Properties
/**
* Add an input filter to the filter library.
*
* @throws NullPointerException if the supplied filter is null
*/
void addFilter(InputFilter filter) {
if (filter == null) {
throw new NullPointerException(sm.getString("iib.filter.npe"));
}
InputFilter[] newFilterLibrary = new InputFilter[filterLibrary.length + 1];
for (int i = 0; i < filterLibrary.length; i++) {
newFilterLibrary[i] = filterLibrary[i];
}
newFilterLibrary[filterLibrary.length] = filter;
filterLibrary = newFilterLibrary;
activeFilters = new InputFilter[filterLibrary.length];
}
/**
* Get filters.
*/
InputFilter[] getFilters() {
return filterLibrary;
}
/**
* Add an input filter to the filter library.
*/
void addActiveFilter(InputFilter filter) {
if (lastActiveFilter == -1) {
filter.setBuffer(inputStreamInputBuffer);
} else {
for (int i = 0; i <= lastActiveFilter; i++) {
if (activeFilters[i] == filter)
return;
}
filter.setBuffer(activeFilters[lastActiveFilter]);
}
activeFilters[++lastActiveFilter] = filter;
filter.setRequest(request);
}
/**
* Set the swallow input flag.
*/
void setSwallowInput(boolean swallowInput) {
this.swallowInput = swallowInput;
}
// ---------------------------------------------------- InputBuffer Methods
/**
* @deprecated Unused. Will be removed in Tomcat 9. Use
* {@link #doRead(ApplicationBufferHandler)}
*/
@Deprecated
@Override
public int doRead(ByteChunk chunk) throws IOException {
if (lastActiveFilter == -1)
return inputStreamInputBuffer.doRead(chunk);
else
return activeFilters[lastActiveFilter].doRead(chunk);
}
@Override
public int doRead(ApplicationBufferHandler handler) throws IOException {
if (lastActiveFilter == -1)
return inputStreamInputBuffer.doRead(handler);
else
return activeFilters[lastActiveFilter].doRead(handler);
}
// ------------------------------------------------------- Protected Methods
/**
* Recycle the input buffer. This should be called when closing the
* connection.
*/
void recycle() {
wrapper = null;
request.recycle();
for (int i = 0; i <= lastActiveFilter; i++) {
activeFilters[i].recycle();
}
byteBuffer.limit(0).position(0);
lastActiveFilter = -1;
parsingHeader = true;
swallowInput = true;
headerParsePos = HeaderParsePosition.HEADER_START;
parsingRequestLine = true;
parsingRequestLinePhase = 0;
parsingRequestLineEol = false;
parsingRequestLineStart = 0;
parsingRequestLineQPos = -1;
headerData.recycle();
}
/**
* End processing of current HTTP request.
* Note: All bytes of the current request should have been already
* consumed. This method only resets all the pointers so that we are ready
* to parse the next HTTP request.
*/
void nextRequest() {
request.recycle();
if (byteBuffer.position() > 0) {
if (byteBuffer.remaining() > 0) {
// Copy leftover bytes to the beginning of the buffer
byteBuffer.compact();
byteBuffer.flip();
} else {
// Reset position and limit to 0
byteBuffer.position(0).limit(0);
}
}
// Recycle filters
for (int i = 0; i <= lastActiveFilter; i++) {
activeFilters[i].recycle();
}
// Reset pointers
lastActiveFilter = -1;
parsingHeader = true;
swallowInput = true;
headerParsePos = HeaderParsePosition.HEADER_START;
parsingRequestLine = true;
parsingRequestLinePhase = 0;
parsingRequestLineEol = false;
parsingRequestLineStart = 0;
parsingRequestLineQPos = -1;
headerData.recycle();
}
/**
* Read the request line. This function is meant to be used during the
* HTTP request header parsing. Do NOT attempt to read the request body
* using it.
*
* @throws IOException If an exception occurs during the underlying socket
* read operations, or if the given buffer is not big enough to accommodate
* the whole line.
* @return true if data is properly fed; false if no data is available
* immediately and thread should be freed
*/
boolean parseRequestLine(boolean keptAlive) throws IOException {
// check state
if (!parsingRequestLine) {
return true;
}
//
// Skipping blank lines
//
if (parsingRequestLinePhase < 2) {
byte chr = 0;
do {
// Read new bytes if needed
if (byteBuffer.position() >= byteBuffer.limit()) {
if (keptAlive) {
// Haven't read any request data yet so use the keep-alive
// timeout.
wrapper.setReadTimeout(wrapper.getEndpoint().getKeepAliveTimeout());
}
if (!fill(false)) {
// A read is pending, so no longer in initial state
parsingRequestLinePhase = 1;
return false;
}
// At least one byte of the request has been received.
// Switch to the socket timeout.
wrapper.setReadTimeout(wrapper.getEndpoint().getConnectionTimeout());
}
if (!keptAlive && byteBuffer.position() == 0 && byteBuffer.limit() >= CLIENT_PREFACE_START.length - 1) {
boolean prefaceMatch = true;
for (int i = 0; i < CLIENT_PREFACE_START.length && prefaceMatch; i++) {
if (CLIENT_PREFACE_START[i] != byteBuffer.get(i)) {
prefaceMatch = false;
}
}
if (prefaceMatch) {
// HTTP/2 preface matched
parsingRequestLinePhase = -1;
return false;
}
}
// Set the start time once we start reading data (even if it is
// just skipping blank lines)
if (request.getStartTime() < 0) {
request.setStartTime(System.currentTimeMillis());
}
chr = byteBuffer.get();
} while ((chr == Constants.CR) || (chr == Constants.LF));
byteBuffer.position(byteBuffer.position() - 1);
parsingRequestLineStart = byteBuffer.position();
parsingRequestLinePhase = 2;
if (log.isDebugEnabled()) {
log.debug("Received ["
+ new String(byteBuffer.array(), byteBuffer.position(), byteBuffer.remaining(), StandardCharsets.ISO_8859_1) + "]");
}
}
if (parsingRequestLinePhase == 2) {
//
// Reading the method name
// Method name is a token
//
boolean space = false;
while (!space) {
// Read new bytes if needed
if (byteBuffer.position() >= byteBuffer.limit()) {
if (!fill(false)) // request line parsing
return false;
}
// Spec says method name is a token followed by a single SP but
// also be tolerant of multiple SP and/or HT.
int pos = byteBuffer.position();
byte chr = byteBuffer.get();
if (chr == Constants.SP || chr == Constants.HT) {
space = true;
request.method().setBytes(byteBuffer.array(), parsingRequestLineStart,
pos - parsingRequestLineStart);
} else if (!HttpParser.isToken(chr)) {
byteBuffer.position(byteBuffer.position() - 1);
throw new IllegalArgumentException(sm.getString("iib.invalidmethod"));
}
}
parsingRequestLinePhase = 3;
}
if (parsingRequestLinePhase == 3) {
// Spec says single SP but also be tolerant of multiple SP and/or HT
boolean space = true;
while (space) {
// Read new bytes if needed
if (byteBuffer.position() >= byteBuffer.limit()) {
if (!fill(false)) // request line parsing
return false;
}
byte chr = byteBuffer.get();
if (!(chr == Constants.SP || chr == Constants.HT)) {
space = false;
byteBuffer.position(byteBuffer.position() - 1);
}
}
parsingRequestLineStart = byteBuffer.position();
parsingRequestLinePhase = 4;
}
if (parsingRequestLinePhase == 4) {
// Mark the current buffer position
int end = 0;
//
// Reading the URI
//
boolean space = false;
while (!space) {
// Read new bytes if needed
if (byteBuffer.position() >= byteBuffer.limit()) {
if (!fill(false)) // request line parsing
return false;
}
int pos = byteBuffer.position();
byte chr = byteBuffer.get();
if (chr == Constants.SP || chr == Constants.HT) {
space = true;
end = pos;
} else if (chr == Constants.CR || chr == Constants.LF) {
// HTTP/0.9 style request
parsingRequestLineEol = true;
space = true;
end = pos;
} else if (chr == Constants.QUESTION && parsingRequestLineQPos == -1) {
parsingRequestLineQPos = pos;
} else if (HttpParser.isNotRequestTarget(chr)) {
throw new IllegalArgumentException(sm.getString("iib.invalidRequestTarget"));
}
}
if (parsingRequestLineQPos >= 0) {
request.queryString().setBytes(byteBuffer.array(), parsingRequestLineQPos + 1,
end - parsingRequestLineQPos - 1);
request.requestURI().setBytes(byteBuffer.array(), parsingRequestLineStart,
parsingRequestLineQPos - parsingRequestLineStart);
} else {
request.requestURI().setBytes(byteBuffer.array(), parsingRequestLineStart,
end - parsingRequestLineStart);
}
parsingRequestLinePhase = 5;
}
if (parsingRequestLinePhase == 5) {
// Spec says single SP but also be tolerant of multiple and/or HT
boolean space = true;
while (space) {
// Read new bytes if needed
if (byteBuffer.position() >= byteBuffer.limit()) {
if (!fill(false)) // request line parsing
return false;
}
byte chr = byteBuffer.get();
if (!(chr == Constants.SP || chr == Constants.HT)) {
space = false;
byteBuffer.position(byteBuffer.position() - 1);
}
}
parsingRequestLineStart = byteBuffer.position();
parsingRequestLinePhase = 6;
// Mark the current buffer position
end = 0;
}
if (parsingRequestLinePhase == 6) {
//
// Reading the protocol
// Protocol is always "HTTP/" DIGIT "." DIGIT
//
while (!parsingRequestLineEol) {
// Read new bytes if needed
if (byteBuffer.position() >= byteBuffer.limit()) {
if (!fill(false)) // request line parsing
return false;
}
int pos = byteBuffer.position();
byte chr = byteBuffer.get();
if (chr == Constants.CR) {
end = pos;
} else if (chr == Constants.LF) {
if (end == 0) {
end = pos;
}
parsingRequestLineEol = true;
} else if (!HttpParser.isHttpProtocol(chr)) {
throw new IllegalArgumentException(sm.getString("iib.invalidHttpProtocol"));
}
}
if ((end - parsingRequestLineStart) > 0) {
request.protocol().setBytes(byteBuffer.array(), parsingRequestLineStart,
end - parsingRequestLineStart);
} else {
request.protocol().setString("");
}
parsingRequestLine = false;
parsingRequestLinePhase = 0;
parsingRequestLineEol = false;
parsingRequestLineStart = 0;
return true;
}
throw new IllegalStateException(
"Invalid request line parse phase:" + parsingRequestLinePhase);
}
/**
* Parse the HTTP headers.
*/
boolean parseHeaders() throws IOException {
if (!parsingHeader) {
throw new IllegalStateException(sm.getString("iib.parseheaders.ise.error"));
}
HeaderParseStatus status = HeaderParseStatus.HAVE_MORE_HEADERS;
do {
status = parseHeader();
// Checking that
// (1) Headers plus request line size does not exceed its limit
// (2) There are enough bytes to avoid expanding the buffer when
// reading body
// Technically, (2) is technical limitation, (1) is logical
// limitation to enforce the meaning of headerBufferSize
// From the way how buf is allocated and how blank lines are being
// read, it should be enough to check (1) only.
if (byteBuffer.position() > headerBufferSize || byteBuffer.capacity() - byteBuffer.position() < socketReadBufferSize) {
throw new IllegalArgumentException(sm.getString("iib.requestheadertoolarge.error"));
}
} while (status == HeaderParseStatus.HAVE_MORE_HEADERS);
if (status == HeaderParseStatus.DONE) {
parsingHeader = false;
end = byteBuffer.position();
return true;
} else {
return false;
}
}
int getParsingRequestLinePhase() {
return parsingRequestLinePhase;
}
/**
* End request (consumes leftover bytes).
*
* @throws IOException an underlying I/O error occurred
*/
void endRequest() throws IOException {
if (swallowInput && (lastActiveFilter != -1)) {
int extraBytes = (int) activeFilters[lastActiveFilter].end();
byteBuffer.position(byteBuffer.position() - extraBytes);
}
}
/**
* Available bytes in the buffers (note that due to encoding, this may not
* correspond).
*/
int available(boolean read) {
int available = byteBuffer.remaining();
if ((available == 0) && (lastActiveFilter >= 0)) {
for (int i = 0; (available == 0) && (i <= lastActiveFilter); i++) {
available = activeFilters[i].available();
}
}
if (available > 0 || !read) {
return available;
}
try {
fill(false);
available = byteBuffer.remaining();
} catch (IOException ioe) {
if (log.isDebugEnabled()) {
log.debug(sm.getString("iib.available.readFail"), ioe);
}
// Not ideal. This will indicate that data is available which should
// trigger a read which in turn will trigger another IOException and
// that one can be thrown.
available = 1;
}
return available;
}
/**
* Has all of the request body been read? There are subtle differences
* between this and available() > 0 primarily because of having to handle
* faking non-blocking reads with the blocking IO connector.
*/
boolean isFinished() {
if (byteBuffer.limit() > byteBuffer.position()) {
// Data to read in the buffer so not finished
return false;
}
/*
* Don't use fill(false) here because in the following circumstances
* BIO will block - possibly indefinitely
* - client is using keep-alive and connection is still open
* - client has sent the complete request
* - client has not sent any of the next request (i.e. no pipelining)
* - application has read the complete request
*/
// Check the InputFilters
if (lastActiveFilter >= 0) {
return activeFilters[lastActiveFilter].isFinished();
} else {
// No filters. Assume request is not finished. EOF will signal end of
// request.
return false;
}
}
ByteBuffer getLeftover() {
int available = byteBuffer.remaining();
if (available > 0) {
return ByteBuffer.wrap(byteBuffer.array(), byteBuffer.position(), available);
} else {
return null;
}
}
void init(SocketWrapperBase socketWrapper) {
wrapper = socketWrapper;
wrapper.setAppReadBufHandler(this);
int bufLength = headerBufferSize +
wrapper.getSocketBufferHandler().getReadBuffer().capacity();
if (byteBuffer == null || byteBuffer.capacity() < bufLength) {
byteBuffer = ByteBuffer.allocate(bufLength);
byteBuffer.position(0).limit(0);
}
}
// --------------------------------------------------------- Private Methods
/**
* Attempts to read some data into the input buffer.
*
* @return true if more data was added to the input buffer
* otherwise false
*/
private boolean fill(boolean block) throws IOException {
if (parsingHeader) {
if (byteBuffer.limit() >= headerBufferSize) {
throw new IllegalArgumentException(sm.getString("iib.requestheadertoolarge.error"));
}
} else {
byteBuffer.limit(end).position(end);
}
byteBuffer.mark();
if (byteBuffer.position() < byteBuffer.limit()) {
byteBuffer.position(byteBuffer.limit());
}
byteBuffer.limit(byteBuffer.capacity());
int nRead = wrapper.read(block, byteBuffer);
byteBuffer.limit(byteBuffer.position()).reset();
if (nRead > 0) {
return true;
} else if (nRead == -1) {
throw new EOFException(sm.getString("iib.eof.error"));
} else {
return false;
}
}
/**
* Parse an HTTP header.
*
* @return false after reading a blank line (which indicates that the
* HTTP header parsing is done
*/
private HeaderParseStatus parseHeader() throws IOException {
//
// Check for blank line
//
byte chr = 0;
while (headerParsePos == HeaderParsePosition.HEADER_START) {
// Read new bytes if needed
if (byteBuffer.position() >= byteBuffer.limit()) {
if (!fill(false)) {// parse header
headerParsePos = HeaderParsePosition.HEADER_START;
return HeaderParseStatus.NEED_MORE_DATA;
}
}
chr = byteBuffer.get();
if (chr == Constants.CR) {
// Skip
} else if (chr == Constants.LF) {
return HeaderParseStatus.DONE;
} else {
byteBuffer.position(byteBuffer.position() - 1);
break;
}
}
if (headerParsePos == HeaderParsePosition.HEADER_START) {
// Mark the current buffer position
headerData.start = byteBuffer.position();
headerParsePos = HeaderParsePosition.HEADER_NAME;
}
//
// Reading the header name
// Header name is always US-ASCII
//
while (headerParsePos == HeaderParsePosition.HEADER_NAME) {
// Read new bytes if needed
if (byteBuffer.position() >= byteBuffer.limit()) {
if (!fill(false)) { // parse header
return HeaderParseStatus.NEED_MORE_DATA;
}
}
int pos = byteBuffer.position();
chr = byteBuffer.get();
if (chr == Constants.COLON) {
headerParsePos = HeaderParsePosition.HEADER_VALUE_START;
headerData.headerValue = headers.addValue(byteBuffer.array(), headerData.start,
pos - headerData.start);
pos = byteBuffer.position();
// Mark the current buffer position
headerData.start = pos;
headerData.realPos = pos;
headerData.lastSignificantChar = pos;
break;
} else if (!HttpParser.isToken(chr)) {
// If a non-token header is detected, skip the line and
// ignore the header
headerData.lastSignificantChar = pos;
byteBuffer.position(byteBuffer.position() - 1);
return skipLine();
}
// chr is next byte of header name. Convert to lowercase.
if ((chr >= Constants.A) && (chr <= Constants.Z)) {
byteBuffer.put(pos, (byte) (chr - Constants.LC_OFFSET));
}
}
// Skip the line and ignore the header
if (headerParsePos == HeaderParsePosition.HEADER_SKIPLINE) {
return skipLine();
}
//
// Reading the header value (which can be spanned over multiple lines)
//
while (headerParsePos == HeaderParsePosition.HEADER_VALUE_START ||
headerParsePos == HeaderParsePosition.HEADER_VALUE ||
headerParsePos == HeaderParsePosition.HEADER_MULTI_LINE) {
if (headerParsePos == HeaderParsePosition.HEADER_VALUE_START) {
// Skipping spaces
while (true) {
// Read new bytes if needed
if (byteBuffer.position() >= byteBuffer.limit()) {
if (!fill(false)) {// parse header
// HEADER_VALUE_START
return HeaderParseStatus.NEED_MORE_DATA;
}
}
chr = byteBuffer.get();
if (!(chr == Constants.SP || chr == Constants.HT)) {
headerParsePos = HeaderParsePosition.HEADER_VALUE;
byteBuffer.position(byteBuffer.position() - 1);
break;
}
}
}
if (headerParsePos == HeaderParsePosition.HEADER_VALUE) {
// Reading bytes until the end of the line
boolean eol = false;
while (!eol) {
// Read new bytes if needed
if (byteBuffer.position() >= byteBuffer.limit()) {
if (!fill(false)) {// parse header
// HEADER_VALUE
return HeaderParseStatus.NEED_MORE_DATA;
}
}
chr = byteBuffer.get();
if (chr == Constants.CR) {
// Skip
} else if (chr == Constants.LF) {
eol = true;
} else if (chr == Constants.SP || chr == Constants.HT) {
byteBuffer.put(headerData.realPos, chr);
headerData.realPos++;
} else {
byteBuffer.put(headerData.realPos, chr);
headerData.realPos++;
headerData.lastSignificantChar = headerData.realPos;
}
}
// Ignore whitespaces at the end of the line
headerData.realPos = headerData.lastSignificantChar;
// Checking the first character of the new line. If the character
// is a LWS, then it's a multiline header
headerParsePos = HeaderParsePosition.HEADER_MULTI_LINE;
}
// Read new bytes if needed
if (byteBuffer.position() >= byteBuffer.limit()) {
if (!fill(false)) {// parse header
// HEADER_MULTI_LINE
return HeaderParseStatus.NEED_MORE_DATA;
}
}
chr = byteBuffer.get(byteBuffer.position());
if (headerParsePos == HeaderParsePosition.HEADER_MULTI_LINE) {
if ((chr != Constants.SP) && (chr != Constants.HT)) {
headerParsePos = HeaderParsePosition.HEADER_START;
break;
} else {
// Copying one extra space in the buffer (since there must
// be at least one space inserted between the lines)
byteBuffer.put(headerData.realPos, chr);
headerData.realPos++;
headerParsePos = HeaderParsePosition.HEADER_VALUE_START;
}
}
}
// Set the header value
headerData.headerValue.setBytes(byteBuffer.array(), headerData.start,
headerData.lastSignificantChar - headerData.start);
headerData.recycle();
return HeaderParseStatus.HAVE_MORE_HEADERS;
}
private HeaderParseStatus skipLine() throws IOException {
headerParsePos = HeaderParsePosition.HEADER_SKIPLINE;
boolean eol = false;
// Reading bytes until the end of the line
while (!eol) {
// Read new bytes if needed
if (byteBuffer.position() >= byteBuffer.limit()) {
if (!fill(false)) {
return HeaderParseStatus.NEED_MORE_DATA;
}
}
int pos = byteBuffer.position();
byte chr = byteBuffer.get();
if (chr == Constants.CR) {
// Skip
} else if (chr == Constants.LF) {
eol = true;
} else {
headerData.lastSignificantChar = pos;
}
}
if (log.isDebugEnabled()) {
log.debug(sm.getString("iib.invalidheader",
new String(byteBuffer.array(), headerData.start,
headerData.lastSignificantChar - headerData.start + 1,
StandardCharsets.ISO_8859_1)));
}
headerParsePos = HeaderParsePosition.HEADER_START;
return HeaderParseStatus.HAVE_MORE_HEADERS;
}
// ----------------------------------------------------------- Inner classes
private static enum HeaderParseStatus {
DONE, HAVE_MORE_HEADERS, NEED_MORE_DATA
}
private static enum HeaderParsePosition {
/**
* Start of a new header. A CRLF here means that there are no more
* headers. Any other character starts a header name.
*/
HEADER_START,
/**
* Reading a header name. All characters of header are HTTP_TOKEN_CHAR.
* Header name is followed by ':'. No whitespace is allowed.
* Any non-HTTP_TOKEN_CHAR (this includes any whitespace) encountered
* before ':' will result in the whole line being ignored.
*/
HEADER_NAME,
/**
* Skipping whitespace before text of header value starts, either on the
* first line of header value (just after ':') or on subsequent lines
* when it is known that subsequent line starts with SP or HT.
*/
HEADER_VALUE_START,
/**
* Reading the header value. We are inside the value. Either on the
* first line or on any subsequent line. We come into this state from
* HEADER_VALUE_START after the first non-SP/non-HT byte is encountered
* on the line.
*/
HEADER_VALUE,
/**
* Before reading a new line of a header. Once the next byte is peeked,
* the state changes without advancing our position. The state becomes
* either HEADER_VALUE_START (if that first byte is SP or HT), or
* HEADER_START (otherwise).
*/
HEADER_MULTI_LINE,
/**
* Reading all bytes until the next CRLF. The line is being ignored.
*/
HEADER_SKIPLINE
}
private static class HeaderParseData {
/**
* When parsing header name: first character of the header.
* When skipping broken header line: first character of the header.
* When parsing header value: first character after ':'.
*/
int start = 0;
/**
* When parsing header name: not used (stays as 0).
* When skipping broken header line: not used (stays as 0).
* When parsing header value: starts as the first character after ':'.
* Then is increased as far as more bytes of the header are harvested.
* Bytes from buf[pos] are copied to buf[realPos]. Thus the string from
* [start] to [realPos-1] is the prepared value of the header, with
* whitespaces removed as needed.
*/
int realPos = 0;
/**
* When parsing header name: not used (stays as 0).
* When skipping broken header line: last non-CR/non-LF character.
* When parsing header value: position after the last not-LWS character.
*/
int lastSignificantChar = 0;
/**
* MB that will store the value of the header. It is null while parsing
* header name and is created after the name has been parsed.
*/
MessageBytes headerValue = null;
public void recycle() {
start = 0;
realPos = 0;
lastSignificantChar = 0;
headerValue = null;
}
}
// ------------------------------------- InputStreamInputBuffer Inner Class
/**
* This class is an input buffer which will read its data from an input
* stream.
*/
private class SocketInputBuffer implements InputBuffer {
/**
*
* @deprecated Unused. Will be removed in Tomcat 9. Use
* {@link #doRead(ApplicationBufferHandler)}
*/
@Deprecated
@Override
public int doRead(ByteChunk chunk) throws IOException {
if (byteBuffer.position() >= byteBuffer.limit()) {
// The application is reading the HTTP request body which is
// always a blocking operation.
if (!fill(true))
return -1;
}
int length = byteBuffer.remaining();
chunk.setBytes(byteBuffer.array(), byteBuffer.position(), length);
byteBuffer.position(byteBuffer.limit());
return length;
}
@Override
public int doRead(ApplicationBufferHandler handler) throws IOException {
if (byteBuffer.position() >= byteBuffer.limit()) {
// The application is reading the HTTP request body which is
// always a blocking operation.
if (!fill(true))
return -1;
}
int length = byteBuffer.remaining();
handler.setByteBuffer(byteBuffer.duplicate());
byteBuffer.position(byteBuffer.limit());
return length;
}
}
@Override
public void setByteBuffer(ByteBuffer buffer) {
byteBuffer = buffer;
}
@Override
public ByteBuffer getByteBuffer() {
return byteBuffer;
}
@Override
public void expand(int size) {
if (byteBuffer.capacity() >= size) {
byteBuffer.limit(size);
}
ByteBuffer temp = ByteBuffer.allocate(size);
temp.put(byteBuffer);
byteBuffer = temp;
byteBuffer.mark();
temp = null;
}
}
