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import java.io.*;
import java.net.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.Enumeration;
import org.apache.catalina.util.IOTools;
public class uwsgi extends HttpServlet {
private String mountpoint = null;
public void init(ServletConfig config) throws ServletException {
super.init(config);
String servletName = getServletConfig().getServletName();
if (servletName == null)
servletName = "";
if (servletName.startsWith("org.apache.catalina.INVOKER."))
throw new UnavailableException
("Cannot invoke uWSGIServlet through the invoker");
if (getServletConfig().getInitParameter("mountpoint") != null) {
mountpoint = getServletConfig().getInitParameter("mountpoint");
if (mountpoint.length() <= 1) {
mountpoint = null;
}
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
uWSGIHandler(request, response);
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
uWSGIHandler(request, response);
}
private void uWSGIHandler(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
Socket client = new Socket("localhost",3017);
ByteArrayOutputStream uwsgi_request = new ByteArrayOutputStream();
DataOutputStream wos = new DataOutputStream(uwsgi_request);
DataOutputStream os = new DataOutputStream(client.getOutputStream());
DataInputStream is = new DataInputStream( client.getInputStream() );
ServletOutputStream out = response.getOutputStream();
boolean hasBody = false;
wos.writeShort(swapShort( (short) 14));
wos.writeBytes("REQUEST_METHOD");
wos.writeShort(swapShort( (short) request.getMethod().length() ) );
wos.writeBytes( request.getMethod() );
wos.writeShort(swapShort( (short) 12));
wos.writeBytes("QUERY_STRING");
if (request.getQueryString() != null) {
wos.writeShort(swapShort( (short) request.getQueryString().length() ) );
wos.writeBytes( request.getQueryString() );
}
else {
wos.writeShort(0);
}
wos.writeShort(swapShort( (short) 11));
wos.writeBytes("SERVER_NAME");
wos.writeShort(swapShort( (short) request.getServerName().length() ) );
wos.writeBytes( request.getServerName() );
wos.writeShort(swapShort( (short) 11));
wos.writeBytes("SERVER_PORT");
wos.writeShort(swapShort( (short) Integer.toString(request.getServerPort()).length() ) );
wos.writeBytes( Integer.toString(request.getServerPort()) );
wos.writeShort(swapShort( (short) 15));
wos.writeBytes("SERVER_PROTOCOL");
wos.writeShort(swapShort( (short) request.getProtocol().length() ) );
wos.writeBytes( request.getProtocol() );
wos.writeShort(swapShort( (short) 11));
wos.writeBytes("REQUEST_URI");
if (request.getQueryString() != null) {
if (request.getQueryString().length() > 0) {
wos.writeShort(swapShort( (short) (request.getRequestURI().length()+1+request.getQueryString().length()) ) );
wos.writeBytes( request.getRequestURI()+"?"+request.getQueryString() );
}
else {
wos.writeShort(swapShort( (short) request.getRequestURI().length() ) );
wos.writeBytes( request.getRequestURI() );
}
}
else {
wos.writeShort(swapShort( (short) request.getRequestURI().length() ) );
wos.writeBytes( request.getRequestURI() );
}
if (mountpoint != null) {
wos.writeShort(swapShort( (short) 11));
wos.writeBytes("SCRIPT_NAME");
wos.writeShort(swapShort( (short) mountpoint.length() ) );
wos.writeBytes( mountpoint );
}
wos.writeShort(swapShort( (short) 9));
wos.writeBytes("PATH_INFO");
if (mountpoint != null) {
wos.writeShort(swapShort( (short) (request.getRequestURI().length() - mountpoint.length()) ) );
wos.writeBytes( request.getRequestURI().substring(mountpoint.length()) );
}
else {
wos.writeShort(swapShort( (short) request.getRequestURI().length() ) );
wos.writeBytes( request.getRequestURI() );
}
wos.writeShort(swapShort( (short) 11));
wos.writeBytes("REMOTE_ADDR");
wos.writeShort(swapShort( (short) request.getRemoteAddr().length() ) );
wos.writeBytes( request.getRemoteAddr() );
if (request.getRemoteUser() != null) {
wos.writeShort(swapShort( (short) 11));
wos.writeBytes("REMOTE_USER");
wos.writeShort(swapShort( (short) request.getRemoteUser().length() ) );
wos.writeBytes( request.getRemoteUser() );
}
if (request.getContentType() != null) {
wos.writeShort(swapShort( (short) 12));
wos.writeBytes("CONTENT_TYPE");
wos.writeShort(swapShort( (short) request.getContentType().length() ) );
wos.writeBytes( request.getContentType() );
}
if (request.getContentLength() > 0) {
wos.writeShort(swapShort( (short) 14));
wos.writeBytes("CONTENT_LENGTH");
String sContentLength = new Integer(request.getContentLength()).toString();
wos.writeShort(swapShort( (short) sContentLength.length() ) );
wos.writeBytes( sContentLength );
hasBody = true;
}
// taken from CGI servlet
Enumeration headers = request.getHeaderNames();
String header = null;
while (headers.hasMoreElements()) {
header = null;
header = ((String) headers.nextElement()).toUpperCase();
wos.writeShort(swapShort( (short) ("HTTP_" + header.replace('-', '_')).length() ));
wos.writeBytes("HTTP_" + header.replace('-', '_'));
wos.writeShort(swapShort( (short) request.getHeader(header).length() ));
wos.writeBytes( request.getHeader(header) );
}
os.writeByte(0);
os.writeShort( swapShort( (short) wos.size() ) );
os.writeByte(0);
uwsgi_request.writeTo( os );
if (hasBody) {
IOTools.flow(request.getInputStream(), os);
}
boolean statusParsed = false;
for(;;) {
String line = byte_readline(is);
if (line == "") {
break;
}
if (statusParsed == false) {
String[] status = line.split(" ",3);
response.setStatus( Integer.parseInt(status[1]) );
statusParsed = true;
}
else {
String[] keyval = line.split(": ",2);
if (keyval.length == 2) {
response.addHeader(keyval[0], keyval[1]);
}
else {
break;
}
}
}
byte cb[] = new byte[4096];
int len = 0;
for(;;) {
len = is.read(cb,0,4096);
if ( len > 0) {
out.write(cb,0,len);
}
else {
break;
}
}
}
private String byte_readline(DataInputStream is) throws IOException {
ByteArrayOutputStream line = new ByteArrayOutputStream();
for(;;) {
byte b = is.readByte();
if (b == 10) {
break;
}
line.write(b);
}
return line.toString("ASCII").replaceAll("\\n","").replaceAll("\\r","");
}
private short swapShort(short x) {
short tmp1 = (short) (x>>8);
short tmp2 = (short) (x<<8);
return (short) (tmp1 | tmp2);
}
}
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