Work around Tomcat/AJP bug.

[jsvc.git] / src / dolda / jsvc / j2ee / J2eeRequest.java

package dolda.jsvc.j2ee;

import dolda.jsvc.*;
import dolda.jsvc.util.*;
import java.io.*;
import java.util.*;
import java.net.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class J2eeRequest extends ResponseBuffer {
    private ServletConfig cfg;
    private HttpServletRequest req;
    private HttpServletResponse resp;
    private String method, path;
    private URL url, context;
    private MultiMap<String, String> params = null;
    private Map<Object, Object> props = new HashMap<Object, Object>();
    
    public J2eeRequest(ServletConfig cfg, HttpServletRequest req, HttpServletResponse resp) {
	this.cfg = cfg;
	this.req = req;
	this.resp = resp;
	{
	    /* Ewwww, this is disgusting! */
	    String scheme = req.getScheme();
	    int port = -1;
	    String host = req.getHeader("Host");
	    if((host == null) || (host.length() < 1)) {
		host = req.getLocalAddr();
		port = req.getLocalPort();
		if((port == 80) && scheme.equals("http"))
		    port = -1;
		else if((port == 443) && scheme.equals("https"))
		    port = -1;
	    } else {
		int p;
		if((host.charAt(0) == '[') && ((p = host.indexOf(']', 1)) > 1)) {
		    String newhost = host.substring(1, p);
		    if((p = host.indexOf(':', p + 1)) >= 0) {
			try {
			    port = Integer.parseInt(host.substring(p + 1));
			} catch(NumberFormatException e) {}
		    }
		    host = newhost;
		} else if((p = host.indexOf(':')) >= 0) {
		    try {
			port = Integer.parseInt(host.substring(p + 1));
			host = host.substring(0, p);
		    } catch(NumberFormatException e) {}
		}
	    }
	    String pi = req.getPathInfo();
	    if(pi == null)
		pi = "";
	    String q = req.getQueryString();
	    if(q != null)
		q = "?" + q;
	    else
		q = "";
	    try {
		url = new URL(scheme, host, port, req.getContextPath() + req.getServletPath() + pi + q);
		context = new URL(scheme, host, port, req.getContextPath());
	    } catch(MalformedURLException e) {
		throw(new Error(e));
	    }
	}
	method = req.getMethod().toUpperCase().intern();
	path = req.getPathInfo();
	while((path.length() > 0) && (path.charAt(0) == '/'))
	    path = path.substring(1);
    }
    
    public Map<Object, Object> props() {
	return(props);
    }
    
    public SocketAddress remoteaddr() {
	try {
	    /* Apparently getRemotePort returns -1 when running on Tomcat over AJP. */
	    int port = req.getRemotePort();
	    if(port < 0)
		port = 0;
	    return(new InetSocketAddress(InetAddress.getByName(req.getRemoteAddr()), port));
	} catch(UnknownHostException e) {
	    /* req.getRemoteAddr should always be a valid IP address,
	     * so this should never happen. */
	    throw(new Error(e));
	}
    }
    
    public SocketAddress localaddr() {
	try {
	    return(new InetSocketAddress(InetAddress.getByName(req.getLocalAddr()), req.getLocalPort()));
	} catch(UnknownHostException e) {
	    /* req.getRemoteAddr should always be a valid IP address,
	     * so this should never happen. */
	    throw(new Error(e));
	}
    }
    
    public URL url() {
	return(url);
    }
    
    public URL rooturl() {
	return(context);
    }
    
    public ServerContext ctx() {
	return(ThreadContext.current().server());
    }
    
    public String method() {
	return(method);
    }
    
    public String path() {
	return(path);
    }

    public InputStream input() {
	try {
	    return(req.getInputStream());
	} catch(IOException e) {
	    /* It is not obvious why this would happen, so I'll wait
	     * until I know whatever might happen to try and implement
	     * meaningful behavior. */
	    throw(new RuntimeException(e));
	}
    }

    public MultiMap<String, String> inheaders() {
	MultiMap<String, String> h = new HeaderTreeMap();
	Enumeration ki = req.getHeaderNames();
	if(ki != null) {
	    while(ki.hasMoreElements()) {
		String k = (String)ki.nextElement();
		Enumeration vi = req.getHeaders(k);
		if(vi != null) {
		    while(vi.hasMoreElements()) {
			String v = (String)vi.nextElement();
			h.add(k, v);
		    }
		}
	    }
	}
	return(h);
    }
    
    public MultiMap<String, String> params() {
	if(params == null) {
	    params = Params.urlparams(this);
	    if(method == "POST") {
		MultiMap<String, String> pp = Params.postparams(this);
		if(pp != null)
		    params.putAll(pp);
	    }
	}
	return(params);
    }
    
    protected void backflush() {
	resp.setStatus(respcode);
	for(String key : outheaders().keySet()) {
	    boolean first = true;
	    for(String val : outheaders().values(key)) {
		if(first) {
		    resp.setHeader(key, val);
		    first = false;
		} else {
		    resp.addHeader(key, val);
		}
	    }
	}
    }
    
    protected OutputStream realoutput() {
	try {
	    return(resp.getOutputStream());
	} catch(IOException e) {
	    /* It is not obvious why this would happen, so I'll wait
	     * until I know whatever might happen to try and implement
	     * meaningful behavior. */
	    throw(new RuntimeException(e));
	}
    }
}