org.bouncycastle.est.ESTResponse Maven / Gradle / Ivy
package org.bouncycastle.est;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Set;
import org.bouncycastle.util.Properties;
import org.bouncycastle.util.Strings;
/**
* A basic http response.
*/
public class ESTResponse
{
private final ESTRequest originalRequest;
private final HttpUtil.Headers headers;
private final byte[] lineBuffer;
private final Source source;
private String HttpVersion;
private int statusCode;
private String statusMessage;
private InputStream inputStream;
private Long contentLength;
private long read = 0;
private Long absoluteReadLimit;
private static final Long ZERO = 0L;
public ESTResponse(ESTRequest originalRequest, Source source)
throws IOException
{
this.originalRequest = originalRequest;
this.source = source;
if (source instanceof LimitedSource)
{
this.absoluteReadLimit = ((LimitedSource)source).getAbsoluteReadLimit();
}
Set opts = Properties.asKeySet("org.bouncycastle.debug.est");
if (opts.contains("input") ||
opts.contains("all"))
{
this.inputStream = new PrintingInputStream(source.getInputStream());
}
else
{
this.inputStream = source.getInputStream();
}
this.headers = new HttpUtil.Headers();
this.lineBuffer = new byte[1024];
process();
}
private void process()
throws IOException
{
//
// Status line.
//
HttpVersion = readStringIncluding(' ');
this.statusCode = Integer.parseInt(readStringIncluding(' '));
this.statusMessage = readStringIncluding('\n');
//
// Headers.
//
String line = readStringIncluding('\n');
int i;
while (line.length() > 0)
{
i = line.indexOf(':');
if (i > -1)
{
String k = Strings.toLowerCase(line.substring(0, i).trim()); // Header keys are case insensitive
headers.add(k, line.substring(i + 1).trim());
}
line = readStringIncluding('\n');
}
contentLength = getContentLength();
//
// Concerned that different servers may or may not set a Content-length
// for these success types. In this case we will arbitrarily set content length
// to zero.
//
if (statusCode == 204 || statusCode == 202)
{
if (contentLength == null)
{
contentLength = 0L;
}
else
{
if (statusCode == 204 && contentLength > 0)
{
throw new IOException("Got HTTP status 204 but Content-length > 0.");
}
}
}
if (contentLength == null)
{
throw new IOException("No Content-length header.");
}
if (contentLength.equals(ZERO))
{
//
// The server is likely to hang up the socket and any attempt to read can
// result in a broken pipe rather than an eof.
// So we will return a dummy input stream that will return eof to anything that reads from it.
//
inputStream = new InputStream()
{
public int read()
throws IOException
{
return -1;
}
};
}
if (contentLength < 0)
{
throw new IOException("Server returned negative content length: " + absoluteReadLimit);
}
if (absoluteReadLimit != null && contentLength >= absoluteReadLimit)
{
throw new IOException("Content length longer than absolute read limit: " + absoluteReadLimit + " Content-Length: " + contentLength);
}
inputStream = wrapWithCounter(inputStream, absoluteReadLimit);
//
// Observed that some
//
if ("base64".equalsIgnoreCase(getHeader("content-transfer-encoding")))
{
inputStream = new CTEBase64InputStream(inputStream, getContentLength());
}
}
public String getHeader(String key)
{
return headers.getFirstValue(key);
}
protected InputStream wrapWithCounter(final InputStream in, final Long absoluteReadLimit)
{
return new InputStream()
{
public int read()
throws IOException
{
int i = in.read();
if (i > -1)
{
read++;
if (absoluteReadLimit != null && read >= absoluteReadLimit)
{
throw new IOException("Absolute Read Limit exceeded: " + absoluteReadLimit);
}
}
return i;
}
public void close()
throws IOException
{
if (contentLength != null && contentLength - 1 > read)
{
throw new IOException("Stream closed before limit fully read, Read: " + read + " ContentLength: " + contentLength);
}
if (in.available() > 0)
{
throw new IOException("Stream closed with extra content in pipe that exceeds content length.");
}
in.close();
}
};
}
protected String readStringIncluding(char until)
throws IOException
{
int c = 0;
int j;
do
{
j = inputStream.read();
lineBuffer[c++] = (byte)j;
if (c >= lineBuffer.length)
{
throw new IOException("Server sent line > " + lineBuffer.length);
}
}
while (j != until && j > -1);
if (j == -1)
{
throw new EOFException();
}
return new String(lineBuffer, 0, c).trim();
}
public ESTRequest getOriginalRequest()
{
return originalRequest;
}
public HttpUtil.Headers getHeaders()
{
return headers;
}
public String getHttpVersion()
{
return HttpVersion;
}
public int getStatusCode()
{
return statusCode;
}
public String getStatusMessage()
{
return statusMessage;
}
public InputStream getInputStream()
{
return inputStream;
}
public Source getSource()
{
return source;
}
public Long getContentLength()
{
String v = headers.getFirstValue("Content-Length");
if (v == null)
{
return null;
}
try
{
return Long.parseLong(v);
}
catch (RuntimeException nfe)
{
throw new RuntimeException("Content Length: '" + v + "' invalid. " + nfe.getMessage());
}
}
public void close()
throws IOException
{
if (inputStream != null)
{
inputStream.close();
}
this.source.close();
}
private class PrintingInputStream
extends InputStream
{
private final InputStream src;
private PrintingInputStream(InputStream src)
{
this.src = src;
}
public int read()
throws IOException
{
int i = src.read();
return i;
}
public int available()
throws IOException
{
return src.available();
}
public void close()
throws IOException
{
src.close();
}
}
}