/* Handle a request from a connection.
* Called to handle a request on the connection when either the header has been received,
* or after the entire request has been received (for short requests of known length), or
* on the dispatch of an async request.
*/
public void handleAsync(AbstractHttpConnection connection) throws IOException, ServletException {
final AsyncContinuation async = connection.getRequest().getAsyncContinuation();
final AsyncContinuation.AsyncEventState state = async.getAsyncEventState();
final Request baseRequest = connection.getRequest();
final String path = state.getPath();
if (path != null) {
// this is a dispatch with a path
final String contextPath = state.getServletContext().getContextPath();
HttpURI uri = new HttpURI(URIUtil.addPaths(contextPath, path));
baseRequest.setUri(uri);
baseRequest.setRequestURI(null);
baseRequest.setPathInfo(baseRequest.getRequestURI());
if (uri.getQuery() != null) baseRequest.mergeQueryString(uri.getQuery());
}
final String target = baseRequest.getPathInfo();
final HttpServletRequest request = (HttpServletRequest) async.getRequest();
final HttpServletResponse response = (HttpServletResponse) async.getResponse();
if (LOG.isDebugEnabled()) {
LOG.debug("REQUEST " + target + " on " + connection);
handle(target, baseRequest, request, response);
LOG.debug("RESPONSE " + target + " " + connection.getResponse().getStatus());
} else handle(target, baseRequest, request, response);
}
@Override
public boolean startRequest(
HttpMethod httpMethod, String method, ByteBuffer uri, HttpVersion version) {
_expect = false;
_expect100Continue = false;
_expect102Processing = false;
if (_request.getTimeStamp() == 0) _request.setTimeStamp(System.currentTimeMillis());
_request.setMethod(httpMethod, method);
if (httpMethod == HttpMethod.CONNECT)
_uri.parseConnect(uri.array(), uri.arrayOffset() + uri.position(), uri.remaining());
else _uri.parse(uri.array(), uri.arrayOffset() + uri.position(), uri.remaining());
_request.setUri(_uri);
String path;
try {
path = _uri.getDecodedPath();
} catch (Exception e) {
LOG.warn("Failed UTF-8 decode for request path, trying ISO-8859-1");
LOG.ignore(e);
path = _uri.getDecodedPath(StandardCharsets.ISO_8859_1);
}
String info = URIUtil.canonicalPath(path);
if (info == null) {
if (path == null && _uri.getScheme() != null && _uri.getHost() != null) {
info = "/";
_request.setRequestURI("");
} else {
badMessage(400, null);
return true;
}
}
_request.setPathInfo(info);
_version = version == null ? HttpVersion.HTTP_0_9 : version;
_request.setHttpVersion(_version);
return false;
}
/** Invoked by the HTTPClient. */
public int requestHandler(Request req, Response[] resp) {
HTTPConnection con = req.getConnection();
URI new_loc, cur_loc;
// check for retries
HttpOutputStream out = req.getStream();
if (out != null && deferred_redir_list.get(out) != null) {
copyFrom((RedirectionModule) deferred_redir_list.remove(out));
req.copyFrom(saved_req);
if (new_con) return REQ_NEWCON_RST;
else return REQ_RESTART;
}
// handle permanent redirections
try {
cur_loc =
new URI(
new URI(con.getProtocol(), con.getHost(), con.getPort(), null), req.getRequestURI());
} catch (ParseException pe) {
throw new Error("HTTPClient Internal Error: unexpected exception '" + pe + "'", pe);
}
// handle permanent redirections
Hashtable perm_redir_list =
Util.getList(perm_redir_cntxt_list, req.getConnection().getContext());
if ((new_loc = (URI) perm_redir_list.get(cur_loc)) != null) {
/*
* copy query if present in old url but not in new url. This isn't
* strictly conforming, but some scripts fail to properly propagate the
* query string to the Location header. Unfortunately it looks like we're
* f****d either way: some scripts fail if you don't propagate the query
* string, some fail if you do... God, don't you just love it when people
* can't read a spec? Anway, since we can't get it right for all scripts
* we opt to follow the spec. String nres = new_loc.getPathAndQuery(),
* oquery = Util.getQuery(req.getRequestURI()), nquery =
* Util.getQuery(nres); if (nquery == null && oquery != null) nres += "?"
* + oquery;
*/
String nres = new_loc.getPathAndQuery();
req.setRequestURI(nres);
try {
lastURI = new URI(new_loc, nres);
} catch (ParseException pe) {
if (LOG.isTraceEnabled()) {
LOG.trace("An exception occurred: " + pe.getMessage());
}
}
if (LOG.isDebugEnabled())
LOG.debug(
"Matched request in permanent redirection list - redoing request to "
+ lastURI.toExternalForm());
if (!con.isCompatibleWith(new_loc)) {
try {
con = new HTTPConnection(new_loc);
} catch (ProtocolNotSuppException e) {
throw new Error("HTTPClient Internal Error: unexpected " + "exception '" + e + "'", e);
}
con.setContext(req.getConnection().getContext());
req.setConnection(con);
return REQ_NEWCON_RST;
} else {
return REQ_RESTART;
}
}
return REQ_CONTINUE;
}
/** Invoked by the HTTPClient. */
public int responsePhase2Handler(Response resp, Request req) throws IOException {
/* handle various response status codes until satisfied */
int sts = resp.getStatusCode();
switch (sts) {
case 302: // General (temporary) Redirection (handle like 303)
/*
* Note we only do this munging for POST and PUT. For GET it's not
* necessary; for HEAD we probably want to do another HEAD. For all
* others (i.e. methods from WebDAV, IPP, etc) it's somewhat unclear -
* servers supporting those should really return a 307 or 303, but some
* don't (guess who...), so we just don't touch those.
*/
if (req.getMethod().equals("POST") || req.getMethod().equals("PUT")) {
if (LOG.isDebugEnabled())
LOG.debug(
"Received status: " + sts + " " + resp.getReasonLine() + " - treating as 303");
sts = 303;
}
case 301: // Moved Permanently
case 303: // See Other (use GET)
case 307: // Moved Temporarily (we mean it!)
if (LOG.isDebugEnabled()) LOG.debug("Handling status: " + sts + " " + resp.getReasonLine());
// the spec says automatic redirection may only be done if
// the second request is a HEAD or GET.
if (!req.getMethod().equals("GET") && !req.getMethod().equals("HEAD") && sts != 303) {
if (LOG.isDebugEnabled())
LOG.debug("Not redirected because method is neither HEAD nor GET");
if (sts == 301 && resp.getHeader("Location") != null)
update_perm_redir_list(req, resLocHdr(resp.getHeader("Location"), req));
resp.setEffectiveURI(lastURI);
return RSP_CONTINUE;
}
case 305: // Use Proxy
case 306: // Switch Proxy
if (sts == 305 || sts == 306) {
if (LOG.isDebugEnabled())
LOG.debug("Handling status: " + sts + " " + resp.getReasonLine());
}
// Don't accept 305 from a proxy
if (sts == 305 && req.getConnection().getProxyHost() != null) {
if (LOG.isDebugEnabled()) LOG.debug("305 ignored because a proxy is already in use");
resp.setEffectiveURI(lastURI);
return RSP_CONTINUE;
}
/*
* the level is a primitive way of preventing infinite redirections.
* RFC-2068 set the max to 5, but RFC-2616 has loosened this. Since some
* sites (notably M$) need more levels, this is now set to the
* (arbitrary) value of 15 (god only knows why they need to do even 5
* redirections...).
*/
if (level >= 15 || resp.getHeader("Location") == null) {
if (LOG.isDebugEnabled()) {
if (level >= 15) LOG.debug("Not redirected because of too many levels of redirection");
else LOG.debug("Not redirected because no Location header was present");
}
resp.setEffectiveURI(lastURI);
return RSP_CONTINUE;
}
level++;
URI loc = resLocHdr(resp.getHeader("Location"), req);
HTTPConnection mvd;
String nres;
new_con = false;
if (sts == 305) {
mvd =
new HTTPConnection(
req.getConnection().getProtocol(),
req.getConnection().getHost(),
req.getConnection().getPort());
mvd.setCurrentProxy(loc.getHost(), loc.getPort());
mvd.setContext(req.getConnection().getContext());
new_con = true;
nres = req.getRequestURI();
/*
* There was some discussion about this, and especially Foteos
* Macrides (Lynx) said a 305 should also imply a change to GET (for
* security reasons) - see the thread starting at
* http://www.ics.uci.edu/pub/ietf/http/hypermail/1997q4/0351.html
* However, this is not in the latest draft, but since I agree with
* Foteos we do it anyway...
*/
req.setMethod("GET");
req.setData(null);
req.setStream(null);
} else if (sts == 306) {
// We'll have to wait for Josh to create a new spec here.
return RSP_CONTINUE;
} else {
if (req.getConnection().isCompatibleWith(loc)) {
mvd = req.getConnection();
nres = loc.getPathAndQuery();
} else {
try {
mvd = new HTTPConnection(loc);
nres = loc.getPathAndQuery();
} catch (ProtocolNotSuppException e) {
if (req.getConnection().getProxyHost() == null
|| !loc.getScheme().equalsIgnoreCase("ftp")) return RSP_CONTINUE;
// We're using a proxy and the protocol is ftp -
// maybe the proxy will also proxy ftp...
mvd =
new HTTPConnection(
"http",
req.getConnection().getProxyHost(),
req.getConnection().getProxyPort());
mvd.setCurrentProxy(null, 0);
nres = loc.toExternalForm();
}
mvd.setContext(req.getConnection().getContext());
new_con = true;
}
/*
* copy query if present in old url but not in new url. This isn't
* strictly conforming, but some scripts fail to propagate the query
* properly to the Location header. See comment on line 126. String
* oquery = Util.getQuery(req.getRequestURI()), nquery =
* Util.getQuery(nres); if (nquery == null && oquery != null) nres +=
* "?" + oquery;
*/
if (sts == 303) {
// 303 means "use GET"
if (!req.getMethod().equals("HEAD")) req.setMethod("GET");
req.setData(null);
req.setStream(null);
} else {
// If they used an output stream then they'll have
// to do the resend themselves
if (req.getStream() != null) {
if (!HTTPConnection.deferStreamed) {
if (LOG.isDebugEnabled())
LOG.debug("Status " + sts + " not handled - request has an output stream");
return RSP_CONTINUE;
}
saved_req = (Request) req.clone();
deferred_redir_list.put(req.getStream(), this);
req.getStream().reset();
resp.setRetryRequest(true);
}
if (sts == 301) {
// update permanent redirection list
try {
update_perm_redir_list(req, new URI(loc, nres));
} catch (ParseException pe) {
throw new Error(
"HTTPClient Internal Error: " + "unexpected exception '" + pe + "'", pe);
}
}
}
// Adjust Referer, if present
NVPair[] hdrs = req.getHeaders();
for (int idx = 0; idx < hdrs.length; idx++)
if (hdrs[idx].getName().equalsIgnoreCase("Referer")) {
HTTPConnection con = req.getConnection();
hdrs[idx] = new NVPair("Referer", con + req.getRequestURI());
break;
}
}
req.setConnection(mvd);
req.setRequestURI(nres);
try {
resp.getInputStream().close();
} catch (IOException ioe) {
if (LOG.isTraceEnabled()) {
LOG.trace("An exception occurred: " + ioe.getMessage());
}
}
if (sts != 305 && sts != 306) {
try {
lastURI = new URI(loc, nres);
} catch (ParseException pe) {
if (LOG.isTraceEnabled()) {
LOG.trace("An exception occurred: " + pe.getMessage());
}
}
if (LOG.isDebugEnabled())
LOG.debug(
"Request redirected to "
+ lastURI.toExternalForm()
+ " using method "
+ req.getMethod());
} else {
if (LOG.isDebugEnabled())
LOG.debug(
"Resending request using "
+ "proxy "
+ mvd.getProxyHost()
+ ":"
+ mvd.getProxyPort());
}
if (req.getStream() != null) return RSP_CONTINUE;
else if (new_con) return RSP_NEWCON_REQ;
else return RSP_REQUEST;
default:
return RSP_CONTINUE;
}
}
/*
* @see javax.servlet.RequestDispatcher#forward(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
*/
protected void forward(ServletRequest request, ServletResponse response, DispatcherType dispatch)
throws ServletException, IOException {
Request baseRequest =
(request instanceof Request)
? ((Request) request)
: HttpChannel.getCurrentHttpChannel().getRequest();
Response base_response = baseRequest.getResponse();
base_response.resetForForward();
if (!(request instanceof HttpServletRequest)) request = new ServletRequestHttpWrapper(request);
if (!(response instanceof HttpServletResponse))
response = new ServletResponseHttpWrapper(response);
final boolean old_handled = baseRequest.isHandled();
final String old_uri = baseRequest.getRequestURI();
final String old_context_path = baseRequest.getContextPath();
final String old_servlet_path = baseRequest.getServletPath();
final String old_path_info = baseRequest.getPathInfo();
final String old_query = baseRequest.getQueryString();
final Attributes old_attr = baseRequest.getAttributes();
final DispatcherType old_type = baseRequest.getDispatcherType();
MultiMap<String> old_params = baseRequest.getParameters();
try {
baseRequest.setHandled(false);
baseRequest.setDispatcherType(dispatch);
if (_named != null)
_contextHandler.handle(
_named, baseRequest, (HttpServletRequest) request, (HttpServletResponse) response);
else {
// process any query string from the dispatch URL
String query = _dQuery;
if (query != null) {
// force parameter extraction
if (old_params == null) {
baseRequest.extractParameters();
old_params = baseRequest.getParameters();
}
baseRequest.mergeQueryString(query);
}
ForwardAttributes attr = new ForwardAttributes(old_attr);
// If we have already been forwarded previously, then keep using the established
// original value. Otherwise, this is the first forward and we need to establish the values.
// Note: the established value on the original request for pathInfo and
// for queryString is allowed to be null, but cannot be null for the other values.
if (old_attr.getAttribute(FORWARD_REQUEST_URI) != null) {
attr._pathInfo = (String) old_attr.getAttribute(FORWARD_PATH_INFO);
attr._query = (String) old_attr.getAttribute(FORWARD_QUERY_STRING);
attr._requestURI = (String) old_attr.getAttribute(FORWARD_REQUEST_URI);
attr._contextPath = (String) old_attr.getAttribute(FORWARD_CONTEXT_PATH);
attr._servletPath = (String) old_attr.getAttribute(FORWARD_SERVLET_PATH);
} else {
attr._pathInfo = old_path_info;
attr._query = old_query;
attr._requestURI = old_uri;
attr._contextPath = old_context_path;
attr._servletPath = old_servlet_path;
}
baseRequest.setRequestURI(_uri);
baseRequest.setContextPath(_contextHandler.getContextPath());
baseRequest.setServletPath(null);
baseRequest.setPathInfo(_uri);
baseRequest.setAttributes(attr);
_contextHandler.handle(
_path, baseRequest, (HttpServletRequest) request, (HttpServletResponse) response);
if (!baseRequest.getHttpChannelState().isAsync()) commitResponse(response, baseRequest);
}
} finally {
baseRequest.setHandled(old_handled);
baseRequest.setRequestURI(old_uri);
baseRequest.setContextPath(old_context_path);
baseRequest.setServletPath(old_servlet_path);
baseRequest.setPathInfo(old_path_info);
baseRequest.setAttributes(old_attr);
baseRequest.setParameters(old_params);
baseRequest.setQueryString(old_query);
baseRequest.setDispatcherType(old_type);
}
}