@Nonnull
public static byte[] readHttpPayload(
@Nonnull final InputStream aIS,
@Nonnull final IAS2HttpResponseHandler aResponseHandler,
@Nonnull final IMessage aMsg)
throws IOException {
ValueEnforcer.notNull(aIS, "InputStream");
ValueEnforcer.notNull(aResponseHandler, "ResponseHandler");
ValueEnforcer.notNull(aMsg, "Msg");
final DataInputStream aDataIS = new DataInputStream(aIS);
// Retrieve the message content
byte[] aData = null;
final String sContentLength = aMsg.getHeader(CAS2Header.HEADER_CONTENT_LENGTH);
if (sContentLength == null) {
// No "Content-Length" header present
final String sTransferEncoding = aMsg.getHeader(CAS2Header.HEADER_TRANSFER_ENCODING);
if (sTransferEncoding != null) {
// Remove all whitespaces in the value
if (sTransferEncoding.replaceAll("\\s+", "").equalsIgnoreCase("chunked")) {
// chunked encoding
int nLength = 0;
for (; ; ) {
// First get hex chunk length; followed by CRLF
int nBlocklen = 0;
for (; ; ) {
int ch = aDataIS.readByte();
if (ch == '\n') break;
if (ch >= 'a' && ch <= 'f') ch -= ('a' - 10);
else if (ch >= 'A' && ch <= 'F') ch -= ('A' - 10);
else if (ch >= '0' && ch <= '9') ch -= '0';
else continue;
nBlocklen = (nBlocklen * 16) + ch;
}
// Zero length is end of chunks
if (nBlocklen == 0) break;
// Ok, now read new chunk
final int nNewlen = nLength + nBlocklen;
final byte[] aNewData = new byte[nNewlen];
if (nLength > 0) System.arraycopy(aData, 0, aNewData, 0, nLength);
aDataIS.readFully(aNewData, nLength, nBlocklen);
aData = aNewData;
nLength = nNewlen;
// And now the CRLF after the chunk;
while (true) {
final int n = aDataIS.readByte();
if (n == '\n') break;
}
}
aMsg.setHeader(CAS2Header.HEADER_CONTENT_LENGTH, Integer.toString(nLength));
} else {
// No "Content-Length" and unsupported "Transfer-Encoding"
sendSimpleHTTPResponse(aResponseHandler, HttpURLConnection.HTTP_LENGTH_REQUIRED);
throw new IOException("Transfer-Encoding unimplemented: " + sTransferEncoding);
}
} else {
// No "Content-Length" and no "Transfer-Encoding"
sendSimpleHTTPResponse(aResponseHandler, HttpURLConnection.HTTP_LENGTH_REQUIRED);
throw new IOException("Content-Length missing");
}
} else {
// "Content-Length" is present
// Receive the transmission's data
// XX if a value > 2GB comes in, this will fail!!
final int nContentSize = Integer.parseInt(sContentLength);
aData = new byte[nContentSize];
aDataIS.readFully(aData);
}
return aData;
}
