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// Portions Copyright [2019] Payara Foundation and/or affiliates
package org.apache.catalina.connector;
import org.apache.catalina.LogFacade;
import java.io.BufferedReader;
import java.io.IOException;
import java.util.ResourceBundle;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Coyote implementation of the buffered reader.
*
* @author Remy Maucherat
*/
public class CoyoteReader extends BufferedReader {
// -------------------------------------------------------------- Constants
private static final char[] LINE_SEP = { '\r', '\n' };
private static final int MAX_LINE_LENGTH = 4096;
private static final Logger log = LogFacade.getLogger();
private static final ResourceBundle rb = log.getResourceBundle();
// ----------------------------------------------------- Instance Variables
protected InputBuffer ib;
protected char[] lineBuffer = null;
// ----------------------------------------------------------- Constructors
public CoyoteReader(InputBuffer ib) {
super(ib, 1);
this.ib = ib;
}
// --------------------------------------------------------- Public Methods
/**
* Prevent cloning the facade.
* @return never
* @throws CloneNotSupportedException always
*/
@Override
protected Object clone()
throws CloneNotSupportedException {
throw new CloneNotSupportedException();
}
// -------------------------------------------------------- Package Methods
/**
* Clear facade.
*/
void clear() {
ib = null;
}
// --------------------------------------------------------- Reader Methods
@Override
public void close() throws IOException {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(rb.getString(LogFacade.OBJECT_INVALID_SCOPE_EXCEPTION));
}
ib.close();
}
@Override
public int read() throws IOException {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(rb.getString(LogFacade.OBJECT_INVALID_SCOPE_EXCEPTION));
}
return ib.read();
}
@Override
public int read(char[] cbuf) throws IOException {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(rb.getString(LogFacade.OBJECT_INVALID_SCOPE_EXCEPTION));
}
return ib.read(cbuf, 0, cbuf.length);
}
@Override
public int read(char[] cbuf, int off, int len) throws IOException {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(rb.getString(LogFacade.OBJECT_INVALID_SCOPE_EXCEPTION));
}
return ib.read(cbuf, off, len);
}
@Override
public long skip(long n) throws IOException {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(rb.getString(LogFacade.OBJECT_INVALID_SCOPE_EXCEPTION));
}
return ib.skip(n);
}
@Override
public boolean ready() throws IOException {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(rb.getString(LogFacade.OBJECT_INVALID_SCOPE_EXCEPTION));
}
return ib.ready();
}
@Override
public boolean markSupported() {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(rb.getString(LogFacade.OBJECT_INVALID_SCOPE_EXCEPTION));
}
return true;
}
@Override
public void mark(int readAheadLimit) throws IOException {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(rb.getString(LogFacade.OBJECT_INVALID_SCOPE_EXCEPTION));
}
ib.mark(readAheadLimit);
}
@Override
public void reset() throws IOException {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(rb.getString(LogFacade.OBJECT_INVALID_SCOPE_EXCEPTION));
}
ib.reset();
}
@Override
public String readLine()
throws IOException {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(rb.getString(LogFacade.OBJECT_INVALID_SCOPE_EXCEPTION));
}
if (lineBuffer == null) {
lineBuffer = new char[MAX_LINE_LENGTH];
}
String result = null;
int pos = 0;
int end = -1;
int skip = -1;
StringBuilder aggregator = null;
while (end < 0) {
mark(MAX_LINE_LENGTH);
while ((pos < MAX_LINE_LENGTH) && (end < 0)) {
int nRead = read(lineBuffer, pos, MAX_LINE_LENGTH - pos);
if (nRead < 0) {
if (pos == 0 && aggregator == null) {
return null;
}
end = pos;
skip = pos;
}
for (int i = pos; (i < (pos + nRead)) && (end < 0); i++) {
if (lineBuffer[i] == LINE_SEP[0]) {
end = i;
skip = i + 1;
char nextchar;
if (i == (pos + nRead - 1)) {
nextchar = (char) read();
} else {
nextchar = lineBuffer[i+1];
}
if (nextchar == LINE_SEP[1]) {
skip++;
}
} else if (lineBuffer[i] == LINE_SEP[1]) {
end = i;
skip = i + 1;
}
}
if (nRead > 0) {
pos += nRead;
}
}
if (end < 0) {
if (aggregator == null) {
aggregator = new StringBuilder();
}
aggregator.append(lineBuffer);
pos = 0;
} else {
reset();
if (skip(skip) != skip && log.isLoggable(Level.WARNING)) {
log.log(Level.WARNING, LogFacade.FAILED_SKIP_CHARS_IN_BUFFER, skip);
}
}
}
if (aggregator == null) {
result = new String(lineBuffer, 0, end);
} else {
aggregator.append(lineBuffer, 0, end);
result = aggregator.toString();
}
return result;
}
}
