/* * Copyright (c) 1994, 2024, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.net.www.http; import java.io.*; import java.net.*; import java.util.Locale; import java.util.Objects; import java.util.OptionalInt; import java.util.Properties; import java.util.concurrent.locks.ReentrantLock; import sun.net.NetworkClient; import sun.net.www.MessageHeader; import sun.net.www.HeaderParser; import sun.net.www.MeteredStream; import sun.net.www.ParseUtil; import sun.net.www.protocol.http.AuthCacheImpl; import sun.net.www.protocol.http.HttpURLConnection; import sun.util.logging.PlatformLogger; import static sun.net.www.protocol.http.HttpURLConnection.TunnelState.*; /** * @author Herb Jellinek * @author Dave Brown */ public class HttpClient extends NetworkClient { private final ReentrantLock clientLock = new ReentrantLock(); // whether this httpclient comes from the cache protected boolean cachedHttpClient = false; protected boolean inCache; // Http requests we send MessageHeader requests; // Http data we send with the headers PosterOutputStream poster = null; // true if we are in streaming mode (fixed length or chunked) boolean streaming; // if we've had one io error boolean failedOnce = false; /** Response code for CONTINUE */ private boolean ignoreContinue = true; private static final int HTTP_CONTINUE = 100; /** Default port number for http daemons. REMIND: make these private */ static final int httpPortNumber = 80; /** return default port number (subclasses may override) */ protected int getDefaultPort () { return httpPortNumber; } private static int getDefaultPort(String proto) { if ("http".equalsIgnoreCase(proto)) return 80; if ("https".equalsIgnoreCase(proto)) return 443; return -1; } /* All proxying (generic as well as instance-specific) may be * disabled through use of this flag */ protected boolean proxyDisabled; // are we using proxy in this instance? public boolean usingProxy = false; // target host, port for the URL protected String host; protected int port; /* where we cache currently open, persistent connections */ protected static final KeepAliveCache kac = new KeepAliveCache(); private static final boolean keepAliveProp; // retryPostProp is true by default so as to preserve behavior // from previous releases. private static final boolean retryPostProp; /* Value of the system property jdk.ntlm.cache; if false, then NTLM connections will not be cached. The default value is 'true'. */ private static final boolean cacheNTLMProp; /* Value of the system property jdk.spnego.cache; if false, then connections authentified using the Negotiate/Kerberos scheme will not be cached. The default value is 'true'. */ private static final boolean cacheSPNEGOProp; protected volatile AuthCacheImpl authcache; volatile boolean keepingAlive; /* this is a keep-alive connection */ volatile boolean disableKeepAlive;/* keep-alive has been disabled for this connection - this will be used when recomputing the value of keepingAlive */ int keepAliveConnections = -1; /* number of keep-alives left */ /* * The timeout if specified by the server. Following values possible * 0: the server specified no keep alive headers * -1: the server provided "Connection: keep-alive" but did not specify a * a particular time in a "Keep-Alive:" headers * -2: the server provided "Connection: keep-alive" and timeout=0 * Positive values are the number of seconds specified by the server * in a "Keep-Alive" header */ int keepAliveTimeout = 0; /** whether the response is to be cached */ private CacheRequest cacheRequest = null; /** Url being fetched. */ protected URL url; /* if set, the client will be reused and must not be put in cache */ public boolean reuse = false; // Traffic capture tool, if configured. See HttpCapture class for info private HttpCapture capture = null; /* "jdk.https.negotiate.cbt" property can be set to "always" (always sent), "never" (never sent) or * "domain:a,c.d,*.e.f" (sent to host a, or c.d or to the domain e.f and any of its subdomains). This is * a comma separated list of arbitrary length with no white-space allowed. * If enabled (for a particular destination) then Negotiate/SPNEGO authentication requests will include * a channel binding token for the destination server. The default behavior and setting for the * property is "never" */ private static final String spnegoCBT; private static final PlatformLogger logger = HttpURLConnection.getHttpLogger(); private static void logFinest(String msg) { if (logger.isLoggable(PlatformLogger.Level.FINEST)) { logger.finest(msg); } } private static void logError(String msg) { if (logger.isLoggable(PlatformLogger.Level.SEVERE)) { logger.severe(msg); } } /** * A NOP method kept for backwards binary compatibility * @deprecated -- system properties are no longer cached. */ @Deprecated public static synchronized void resetProperties() { } int getKeepAliveTimeout() { return keepAliveTimeout; } static String normalizeCBT(String s) { if (s == null || s.equals("never")) { return "never"; } if (s.equals("always") || s.startsWith("domain:")) { return s; } else { logError("Unexpected value for \"jdk.https.negotiate.cbt\" system property"); return "never"; } } static { Properties props = System.getProperties(); String keepAlive = props.getProperty("http.keepAlive"); String retryPost = props.getProperty("sun.net.http.retryPost"); String cacheNTLM = props.getProperty("jdk.ntlm.cache"); String cacheSPNEGO = props.getProperty("jdk.spnego.cache"); String s = props.getProperty("jdk.https.negotiate.cbt"); spnegoCBT = normalizeCBT(s); if (keepAlive != null) { keepAliveProp = Boolean.parseBoolean(keepAlive); } else { keepAliveProp = true; } if (retryPost != null) { retryPostProp = Boolean.parseBoolean(retryPost); } else { retryPostProp = true; } if (cacheNTLM != null) { cacheNTLMProp = Boolean.parseBoolean(cacheNTLM); } else { cacheNTLMProp = true; } if (cacheSPNEGO != null) { cacheSPNEGOProp = Boolean.parseBoolean(cacheSPNEGO); } else { cacheSPNEGOProp = true; } } /** * @return true iff http keep alive is set (i.e. enabled). Defaults * to true if the system property http.keepAlive isn't set. */ public boolean getHttpKeepAliveSet() { return keepAliveProp; } public String getSpnegoCBT() { return spnegoCBT; } protected HttpClient() { } protected HttpClient(URL url, boolean proxyDisabled) throws IOException { this(url, null, -1, proxyDisabled); } /* This package-only CTOR should only be used for FTP piggy-backed on HTTP * URL's that use this won't take advantage of keep-alive. * Additionally, this constructor may be used as a last resort when the * first HttpClient gotten through New() failed (probably b/c of a * Keep-Alive mismatch). * * XXX That documentation is wrong ... it's not package-private any more */ public HttpClient(URL url, String proxyHost, int proxyPort) throws IOException { this(url, proxyHost, proxyPort, false); } protected HttpClient(URL url, Proxy p, int to) throws IOException { proxy = (p == null) ? Proxy.NO_PROXY : p; this.host = url.getHost(); this.url = url; port = url.getPort(); if (port == -1) { port = getDefaultPort(); } setConnectTimeout(to); capture = HttpCapture.getCapture(url); openServer(); } protected static Proxy newHttpProxy(String proxyHost, int proxyPort, String proto) { if (proxyHost == null || proto == null) return Proxy.NO_PROXY; int pport = proxyPort < 0 ? getDefaultPort(proto) : proxyPort; InetSocketAddress saddr = InetSocketAddress.createUnresolved(proxyHost, pport); return new Proxy(Proxy.Type.HTTP, saddr); } /* * This constructor gives "ultimate" flexibility, including the ability * to bypass implicit proxying. Sometimes we need to be using tunneling * (transport or network level) instead of proxying (application level), * for example when we don't want the application level data to become * visible to third parties. * * @param url the URL to which we're connecting * @param proxy proxy to use for this URL (e.g. forwarding) * @param proxyPort proxy port to use for this URL * @param proxyDisabled true to disable default proxying */ private HttpClient(URL url, String proxyHost, int proxyPort, boolean proxyDisabled) throws IOException { this(url, proxyDisabled ? Proxy.NO_PROXY : newHttpProxy(proxyHost, proxyPort, "http"), -1); } public HttpClient(URL url, String proxyHost, int proxyPort, boolean proxyDisabled, int to) throws IOException { this(url, proxyDisabled ? Proxy.NO_PROXY : newHttpProxy(proxyHost, proxyPort, "http"), to); } /* This class has no public constructor for HTTP. This method is used to * get an HttpClient to the specified URL. If there's currently an * active HttpClient to that server/port, you'll get that one. */ public static HttpClient New(URL url) throws IOException { return HttpClient.New(url, Proxy.NO_PROXY, -1, true, null); } public static HttpClient New(URL url, boolean useCache) throws IOException { return HttpClient.New(url, Proxy.NO_PROXY, -1, useCache, null); } public static HttpClient New(URL url, Proxy p, int to, boolean useCache, HttpURLConnection httpuc) throws IOException { if (p == null) { p = Proxy.NO_PROXY; } HttpClient ret = null; /* see if one's already around */ if (useCache) { ret = kac.get(url, null); if (ret != null && httpuc != null && httpuc.streaming() && "POST".equals(httpuc.getRequestMethod())) { if (!ret.available()) { ret.inCache = false; ret.closeServer(); ret = null; } } if (ret != null) { AuthCacheImpl ak = httpuc == null ? AuthCacheImpl.getDefault() : httpuc.getAuthCache(); boolean compatible = Objects.equals(ret.proxy, p) && Objects.equals(ret.getAuthCache(), ak); if (compatible) { ret.lock(); try { ret.cachedHttpClient = true; assert ret.inCache; ret.inCache = false; if (httpuc != null && ret.needsTunneling()) httpuc.setTunnelState(TUNNELING); logFinest("KeepAlive stream retrieved from the cache, " + ret); } finally { ret.unlock(); } } else { // We cannot return this connection to the cache as it's // KeepAliveTimeout will get reset. We simply close the connection. // This should be fine as it is very rare that a connection // to the same host will not use the same proxy. ret.lock(); try { ret.inCache = false; ret.closeServer(); } finally { ret.unlock(); } ret = null; } } } if (ret == null) { ret = new HttpClient(url, p, to); if (httpuc != null) { ret.authcache = httpuc.getAuthCache(); } } else { ret.url = url; } return ret; } public static HttpClient New(URL url, Proxy p, int to, HttpURLConnection httpuc) throws IOException { return New(url, p, to, true, httpuc); } public static HttpClient New(URL url, String proxyHost, int proxyPort, boolean useCache) throws IOException { return New(url, newHttpProxy(proxyHost, proxyPort, "http"), -1, useCache, null); } public static HttpClient New(URL url, String proxyHost, int proxyPort, boolean useCache, int to, HttpURLConnection httpuc) throws IOException { return New(url, newHttpProxy(proxyHost, proxyPort, "http"), to, useCache, httpuc); } public final AuthCacheImpl getAuthCache() { return authcache == null ? AuthCacheImpl.getDefault() : authcache; } /* return it to the cache as still usable, if: * 1) It's keeping alive, AND * 2) It still has some connections left, AND * 3) It hasn't had a error (PrintStream.checkError()) * 4) It hasn't timed out * * If this client is not keepingAlive, it should have been * removed from the cache in the parseHeaders() method. */ public void finished() { if (reuse) /* will be reused */ return; keepAliveConnections--; poster = null; if (keepAliveConnections > 0 && isKeepingAlive() && !(serverOutput.checkError())) { /* This connection is keepingAlive && still valid. * Return it to the cache. */ putInKeepAliveCache(); } else { closeServer(); } } protected boolean available() { boolean available = true; int old = -1; lock(); try { try { old = serverSocket.getSoTimeout(); serverSocket.setSoTimeout(1); BufferedInputStream tmpbuf = new BufferedInputStream(serverSocket.getInputStream()); int r = tmpbuf.read(); if (r == -1) { logFinest("HttpClient.available(): " + "read returned -1: not available"); available = false; } } catch (SocketTimeoutException e) { logFinest("HttpClient.available(): " + "SocketTimeout: its available"); } finally { if (old != -1) serverSocket.setSoTimeout(old); } } catch (IOException e) { logFinest("HttpClient.available(): " + "SocketException: not available"); available = false; } finally { unlock(); } return available; } protected void putInKeepAliveCache() { lock(); try { if (inCache) { assert false : "Duplicate put to keep alive cache"; return; } inCache = true; kac.put(url, null, this); } finally { unlock(); } } protected boolean isInKeepAliveCache() { lock(); try { return inCache; } finally { unlock(); } } /* * Close an idle connection to this URL (if it exists in the * cache). */ public void closeIdleConnection() { HttpClient http = kac.get(url, null); if (http != null) { http.closeServer(); } } /* We're very particular here about what our InputStream to the server * looks like for reasons that are apparent if you can decipher the * method parseHTTP(). That's why this method is overridden from the * superclass. */ @Override public void openServer(String server, int port) throws IOException { serverSocket = doConnect(server, port); try { OutputStream out = serverSocket.getOutputStream(); if (capture != null) { out = new HttpCaptureOutputStream(out, capture); } serverOutput = new PrintStream( new BufferedOutputStream(out), false, encoding); } catch (UnsupportedEncodingException e) { throw new InternalError(encoding+" encoding not found", e); } serverSocket.setTcpNoDelay(true); } /* * Returns true if the http request should be tunneled through proxy. * An example where this is the case is Https. */ public boolean needsTunneling() { return false; } /* * Returns true if this httpclient is from cache */ public boolean isCachedConnection() { lock(); try { return cachedHttpClient; } finally { unlock(); } } /* * Finish any work left after the socket connection is * established. In the normal http case, it's a NO-OP. Subclass * may need to override this. An example is Https, where for * direct connection to the origin server, ssl handshake needs to * be done; for proxy tunneling, the socket needs to be converted * into an SSL socket before ssl handshake can take place. */ public void afterConnect() throws IOException { // NO-OP. Needs to be overwritten by HttpsClient } /* * call openServer */ private void openServer(final InetSocketAddress server) throws IOException { assert clientLock.isHeldByCurrentThread(); openServer(server.getHostString(), server.getPort()); } /* * call super.openServer */ private void superOpenServer(final String proxyHost, final int proxyPort) throws IOException { super.openServer(proxyHost, proxyPort); } /* */ protected void openServer() throws IOException { lock(); try { if (keepingAlive) { // already opened return; } if (url.getProtocol().equals("http") || url.getProtocol().equals("https")) { if ((proxy != null) && (proxy.type() == Proxy.Type.HTTP)) { sun.net.www.URLConnection.setProxiedHost(host); openServer((InetSocketAddress) proxy.address()); usingProxy = true; return; } else { // make direct connection openServer(host, port); usingProxy = false; return; } } else { /* we're opening some other kind of url, most likely an * ftp url. */ if ((proxy != null) && (proxy.type() == Proxy.Type.HTTP)) { sun.net.www.URLConnection.setProxiedHost(host); openServer((InetSocketAddress) proxy.address()); usingProxy = true; return; } else { // make direct connection super.openServer(host, port); usingProxy = false; return; } } } finally { unlock(); } } public String getURLFile() throws IOException { String fileName; /* * proxyDisabled is set by subclass HttpsClient! */ if (usingProxy && !proxyDisabled) { // Do not use URLStreamHandler.toExternalForm as the fragment // should not be part of the RequestURI. It should be an // absolute URI which does not have a fragment part. StringBuilder result = new StringBuilder(128); result.append(url.getProtocol()); result.append(":"); if (url.getAuthority() != null && !url.getAuthority().isEmpty()) { result.append("//"); result.append(url.getAuthority()); } if (url.getPath() != null) { result.append(url.getPath()); } if (url.getQuery() != null) { result.append('?'); result.append(url.getQuery()); } fileName = result.toString(); } else { fileName = url.getFile(); if ((fileName == null) || (fileName.isEmpty())) { fileName = "/"; } else if (fileName.charAt(0) == '?') { /* HTTP/1.1 spec says in 5.1.2. about Request-URI: * "Note that the absolute path cannot be empty; if * none is present in the original URI, it MUST be * given as "/" (the server root)." So if the file * name here has only a query string, the path is * empty and we also have to add a "/". */ fileName = "/" + fileName; } } if (fileName.indexOf('\n') == -1) return fileName; else throw new java.net.MalformedURLException("Illegal character in URL"); } /** * @deprecated */ @Deprecated public void writeRequests(MessageHeader head) { requests = head; requests.print(serverOutput); serverOutput.flush(); } public void writeRequests(MessageHeader head, PosterOutputStream pos) throws IOException { requests = head; requests.print(serverOutput); poster = pos; if (poster != null) poster.writeTo(serverOutput); serverOutput.flush(); } public void writeRequests(MessageHeader head, PosterOutputStream pos, boolean streaming) throws IOException { this.streaming = streaming; writeRequests(head, pos); } /** Parse the first line of the HTTP request. It usually looks something like: {@literal "HTTP/1.0 comment\r\n"}. */ public boolean parseHTTP(MessageHeader responses, HttpURLConnection httpuc) throws IOException { /* If "HTTP/*" is found in the beginning, return true. Let * HttpURLConnection parse the mime header itself. * * If this isn't valid HTTP, then we don't try to parse a header * out of the beginning of the response into the responses, * and instead just queue up the output stream to it's very beginning. * This seems most reasonable, and is what the NN browser does. */ try { serverInput = serverSocket.getInputStream(); if (capture != null) { serverInput = new HttpCaptureInputStream(serverInput, capture); } serverInput = new BufferedInputStream(serverInput); return (parseHTTPHeader(responses, httpuc)); } catch (SocketTimeoutException stex) { // We don't want to retry the request when the app. sets a timeout // but don't close the server if timeout while waiting for 100-continue if (ignoreContinue) { closeServer(); } throw stex; } catch (IOException e) { closeServer(); cachedHttpClient = false; if (!failedOnce && requests != null) { Thread thread = Thread.currentThread(); boolean doNotRetry = thread.isVirtual() && thread.isInterrupted(); failedOnce = true; if (getRequestMethod().equals("CONNECT") || streaming || doNotRetry || (httpuc.getRequestMethod().equals("POST") && !retryPostProp)) { // do not retry the request } else { // try once more openServer(); checkTunneling(httpuc); afterConnect(); writeRequests(requests, poster); return parseHTTP(responses, httpuc); } } throw e; } } // Check whether tunnel must be open and open it if necessary // (in the case of HTTPS with proxy) private void checkTunneling(HttpURLConnection httpuc) throws IOException { if (needsTunneling()) { MessageHeader origRequests = requests; PosterOutputStream origPoster = poster; httpuc.doTunneling(); requests = origRequests; poster = origPoster; } } private boolean parseHTTPHeader(MessageHeader responses, HttpURLConnection httpuc) throws IOException { /* If "HTTP/*" is found in the beginning, return true. Let * HttpURLConnection parse the mime header itself. * * If this isn't valid HTTP, then we don't try to parse a header * out of the beginning of the response into the responses, * and instead just queue up the output stream to it's very beginning. * This seems most reasonable, and is what the NN browser does. */ keepAliveConnections = -1; keepAliveTimeout = 0; boolean ret; byte[] b = new byte[8]; try { int nread = 0; serverInput.mark(10); while (nread < 8) { int r = serverInput.read(b, nread, 8 - nread); if (r < 0) { break; } nread += r; } String keep=null; String authenticate=null; ret = b[0] == 'H' && b[1] == 'T' && b[2] == 'T' && b[3] == 'P' && b[4] == '/' && b[5] == '1' && b[6] == '.'; serverInput.reset(); if (ret) { // is valid HTTP - response started w/ "HTTP/1." responses.parseHeader(serverInput); // we've finished parsing http headers // check if there are any applicable cookies to set (in cache) CookieHandler cookieHandler = httpuc.getCookieHandler(); if (cookieHandler != null) { URI uri = ParseUtil.toURI(url); // NOTE: That cast from Map shouldn't be necessary but // a bug in javac is triggered under certain circumstances // So we do put the cast in as a workaround until // it is resolved. if (uri != null) cookieHandler.put(uri, responses.getHeaders()); } /* decide if we're keeping alive: * This is a bit tricky. There's a spec, but most current * servers (10/1/96) that support this differ in dialects. * If the server/client misunderstand each other, the * protocol should fall back onto HTTP/1.0, no keep-alive. */ if (usingProxy) { // not likely a proxy will return this keep = responses.findValue("Proxy-Connection"); authenticate = responses.findValue("Proxy-Authenticate"); } if (keep == null) { keep = responses.findValue("Connection"); authenticate = responses.findValue("WWW-Authenticate"); } // 'disableKeepAlive' starts with the value false. // It can transition from false to true, but once true // it stays true. // If cacheNTLMProp is false, and disableKeepAlive is false, // then we need to examine the response headers to figure out // whether we are doing NTLM authentication. If we do NTLM, // and cacheNTLMProp is false, than we can't keep this connection // alive: we will switch disableKeepAlive to true. boolean canKeepAlive = !disableKeepAlive; if (canKeepAlive && (cacheNTLMProp == false || cacheSPNEGOProp == false) && authenticate != null) { authenticate = authenticate.toLowerCase(Locale.US); if (cacheNTLMProp == false) { canKeepAlive &= !authenticate.startsWith("ntlm "); } if (cacheSPNEGOProp == false) { canKeepAlive &= !authenticate.startsWith("negotiate "); canKeepAlive &= !authenticate.startsWith("kerberos "); } } disableKeepAlive |= !canKeepAlive; if (keep != null && keep.toLowerCase(Locale.US).equals("keep-alive")) { /* some servers, notably Apache1.1, send something like: * "Keep-Alive: timeout=15, max=1" which we should respect. */ if (disableKeepAlive) { keepAliveConnections = 1; } else { HeaderParser p = new HeaderParser( responses.findValue("Keep-Alive")); /* default should be larger in case of proxy */ keepAliveConnections = p.findInt("max", usingProxy?50:5); if (keepAliveConnections < 0) { keepAliveConnections = usingProxy?50:5; } OptionalInt timeout = p.findInt("timeout"); if (timeout.isEmpty()) { keepAliveTimeout = -1; } else { keepAliveTimeout = timeout.getAsInt(); if (keepAliveTimeout < 0) { // if the server specified a negative (invalid) value // then we set to -1, which is equivalent to no value keepAliveTimeout = -1; } else if (keepAliveTimeout == 0) { // handled specially to mean close connection immediately keepAliveTimeout = -2; } } } } else if (b[7] != '0') { /* * We're talking 1.1 or later. Keep persistent until * the server says to close. */ if (keep != null || disableKeepAlive) { /* * The only Connection token we understand is close. * Paranoia: if there is any Connection header then * treat as non-persistent. */ keepAliveConnections = 1; } else { keepAliveConnections = 5; } } } else if (nread != 8) { if (!failedOnce && requests != null) { failedOnce = true; if (getRequestMethod().equals("CONNECT") || streaming || (httpuc.getRequestMethod().equals("POST") && !retryPostProp)) { // do not retry the request } else { closeServer(); cachedHttpClient = false; openServer(); checkTunneling(httpuc); afterConnect(); writeRequests(requests, poster); return parseHTTP(responses, httpuc); } } throw new SocketException("Unexpected end of file from server"); } else { // we can't vouche for what this is.... responses.set("Content-type", "unknown/unknown"); } } catch (IOException e) { throw e; } int code = -1; try { String resp; resp = responses.getValue(0); /* should have no leading/trailing LWS * expedite the typical case by assuming it has * form "HTTP/1.x 2XX " */ int ind; ind = resp.indexOf(' '); while(resp.charAt(ind) == ' ') ind++; code = Integer.parseInt(resp, ind, ind + 3, 10); } catch (Exception e) {} if (code == 101) { // We don't support protocol upgrade through the "Upgrade:" request header, so if a // server still unexpectedly sends a 101 response, we consider that a protocol violation // and close the connection. closeServer(); logFinest("Closed connection due to unexpected 101 response"); // clear off the response headers so that they don't get propagated // to the application responses.reset(); throw new ProtocolException("Unexpected 101 response from server"); } // ignore interim informational responses and continue to wait for final response. if ((code == HTTP_CONTINUE && ignoreContinue) || (code >= 102 && code <= 199)) { logFinest("Ignoring interim informational 1xx response: " + code); responses.reset(); return parseHTTPHeader(responses, httpuc); } long cl = -1; /* * Set things up to parse the entity body of the reply. * We should be smarter about avoid pointless work when * the HTTP method and response code indicate there will be * no entity body to parse. */ String te = responses.findValue("Transfer-Encoding"); if (te != null && te.equalsIgnoreCase("chunked")) { serverInput = new ChunkedInputStream(serverInput, this, responses); /* * If keep alive not specified then close after the stream * has completed. */ if (keepAliveConnections <= 1) { keepAliveConnections = 1; keepingAlive = false; } else { keepingAlive = !disableKeepAlive; } failedOnce = false; } else { /* * If it's a keep alive connection then we will keep * (alive if :- * 1. content-length is specified, or * 2. "Not-Modified" or "No-Content" responses - RFC 2616 states that * 204 or 304 response must not include a message body. */ String cls = responses.findValue("content-length"); if (cls != null) { try { cl = Long.parseLong(cls); } catch (NumberFormatException e) { cl = -1; } } String requestLine = requests.getKey(0); if ((requestLine != null && (requestLine.startsWith("HEAD"))) || code == HttpURLConnection.HTTP_NOT_MODIFIED || code == HttpURLConnection.HTTP_NO_CONTENT) { cl = 0; } if (keepAliveConnections > 1 && (cl >= 0 || code == HttpURLConnection.HTTP_NOT_MODIFIED || code == HttpURLConnection.HTTP_NO_CONTENT)) { keepingAlive = !disableKeepAlive; failedOnce = false; } else if (keepingAlive) { /* Previously we were keeping alive, and now we're not. Remove * this from the cache (but only here, once) - otherwise we get * multiple removes and the cache count gets messed up. */ keepingAlive=false; } } /* wrap a KeepAliveStream/MeteredStream around it if appropriate */ if (cl > 0) { // In this case, content length is well known, so it is okay // to wrap the input stream with KeepAliveStream/MeteredStream. // If disableKeepAlive == true, the client will not be returned // to the cache. But we still need to use a keepalive stream to // allow the multi-message authentication exchange on the connection boolean useKeepAliveStream = isKeepingAlive() || disableKeepAlive; if (useKeepAliveStream) { // Wrap KeepAliveStream if keep alive is enabled. logFinest("KeepAlive stream used: " + url); serverInput = new KeepAliveStream(serverInput, cl, this); failedOnce = false; } else { serverInput = new MeteredStream(serverInput, cl); } } return ret; } public InputStream getInputStream() { lock(); try { return serverInput; } finally { unlock(); } } public OutputStream getOutputStream() { return serverOutput; } @Override public String toString() { return getClass().getName()+"("+url+")"; } public final boolean isKeepingAlive() { return getHttpKeepAliveSet() && keepingAlive; } public void setCacheRequest(CacheRequest cacheRequest) { this.cacheRequest = cacheRequest; } CacheRequest getCacheRequest() { return cacheRequest; } String getRequestMethod() { if (requests != null) { String requestLine = requests.getKey(0); if (requestLine != null) { return requestLine.split("\\s+")[0]; } } return ""; } public void setDoNotRetry(boolean value) { // failedOnce is used to determine if a request should be retried. failedOnce = value; } public void setIgnoreContinue(boolean value) { ignoreContinue = value; } /* Use only on connections in error. */ @Override public void closeServer() { try { keepingAlive = false; serverSocket.close(); } catch (Exception e) {} } /** * @return the proxy host being used for this client, or null * if we're not going through a proxy */ public String getProxyHostUsed() { if (!usingProxy) { return null; } else { return ((InetSocketAddress)proxy.address()).getHostString(); } } public boolean getUsingProxy() { return usingProxy; } /** * @return the proxy port being used for this client. Meaningless * if getProxyHostUsed() gives null. */ public int getProxyPortUsed() { if (usingProxy) return ((InetSocketAddress)proxy.address()).getPort(); return -1; } public final void lock() { clientLock.lock(); } public final void unlock() { clientLock.unlock(); } }