Java tutorial
/* SOURCE: https://raw.github.com/lightbody/browsermob-proxy/7f0a6ec2663bace3f64c878e7f006090c38fbfdc/src/main/java/net/lightbody/bmp/proxy/BrowserMobProxyHandler.java ORIGINAL LICENSE: Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. "License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document. "Licensor" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License. "Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. 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See the License for the specific language governing permissions and limitations under the License. */ package com.groupon.odo.bmp; import com.groupon.odo.proxylib.Constants; import com.groupon.odo.proxylib.ServerRedirectService; import java.io.File; import java.io.IOException; import java.net.BindException; import java.net.ConnectException; import java.net.InetAddress; import java.net.Socket; import java.net.URL; import java.net.UnknownHostException; import java.security.cert.X509Certificate; import java.util.Date; import java.util.Enumeration; import java.util.HashSet; import java.util.LinkedHashMap; import java.util.Map; import java.util.Set; import com.squareup.okhttp.OkHttpClient; import com.squareup.okhttp.Request; import com.squareup.okhttp.Response; import com.squareup.okhttp.RequestBody; import com.squareup.okhttp.MediaType; import net.lightbody.bmp.proxy.FirefoxErrorConstants; import net.lightbody.bmp.proxy.FirefoxErrorContent; import net.lightbody.bmp.proxy.http.BadURIException; import net.lightbody.bmp.proxy.jetty.http.EOFException; import net.lightbody.bmp.proxy.jetty.http.HttpConnection; import net.lightbody.bmp.proxy.jetty.http.HttpException; import net.lightbody.bmp.proxy.jetty.http.HttpFields; import net.lightbody.bmp.proxy.jetty.http.HttpListener; import net.lightbody.bmp.proxy.jetty.http.HttpMessage; import net.lightbody.bmp.proxy.jetty.http.HttpRequest; import net.lightbody.bmp.proxy.jetty.http.HttpResponse; import net.lightbody.bmp.proxy.jetty.http.HttpServer; import net.lightbody.bmp.proxy.jetty.http.HttpTunnel; import net.lightbody.bmp.proxy.jetty.http.SocketListener; import net.lightbody.bmp.proxy.jetty.http.SslListener; import net.lightbody.bmp.proxy.jetty.jetty.Server; import net.lightbody.bmp.proxy.jetty.util.InetAddrPort; import net.lightbody.bmp.proxy.jetty.util.URI; import net.lightbody.bmp.proxy.selenium.KeyStoreManager; import net.lightbody.bmp.proxy.selenium.LauncherUtils; import net.lightbody.bmp.proxy.selenium.SeleniumProxyHandler; import net.lightbody.bmp.proxy.util.Log; import okio.BufferedSink; import org.apache.commons.io.IOUtils; import org.apache.http.NoHttpResponseException; import org.apache.http.conn.ConnectTimeoutException; import javax.net.ssl.TrustManager; import javax.net.ssl.X509TrustManager; import javax.net.ssl.SSLContext; import javax.net.ssl.SSLSocketFactory; import javax.net.ssl.HostnameVerifier; import javax.net.ssl.SSLSession; import javax.net.ssl.SSLProtocolException; import java.security.cert.CertificateException; public class BrowserMobProxyHandler extends SeleniumProxyHandler { private static final Log LOG = new Log(); private static final int HEADER_BUFFER_DEFAULT = 2; private static final long serialVersionUID = 1L; private final String localIP = "127.0.0.1"; private Server jettyServer; private int headerBufferMultiplier = HEADER_BUFFER_DEFAULT; protected final Set<SslRelay> sslRelays = new HashSet<SslRelay>(); // BEGIN ODO CHANGES // Map to hold onto listeners per hostname protected final Map<String, SslRelayOdo> _sslMap = new LinkedHashMap<String, SslRelayOdo>(); protected final Map<String, Date> _certExpirationMap = new LinkedHashMap<String, Date>(); // END ODO CHANGES public BrowserMobProxyHandler() { super(true, "", "", false, false); setShutdownLock(new Object()); // set the tunnel timeout to something larger than the default 30 seconds // we're doing this because SSL connections taking longer than this timeout // will result in a socket connection close that does NOT get handled by the // normal socket connection closing reportError(). Further, it has been seen // that Firefox will actually retry the connection, causing very strange // behavior observed in case http://browsermob.assistly.com/agent/case/27843 // // You can also reproduce it by simply finding some slow loading SSL site // that takes greater than 30 seconds to response. // // Finally, it should be noted that we're setting this timeout to some value // that we anticipate will be larger than any reasonable response time of a // real world request. We don't set it to -1 because the underlying ProxyHandler // will not use it if it's <= 0. We also don't set it to Long.MAX_VALUE because // we don't yet know if this will cause a serious resource drain, so we're // going to try something like 5 minutes for now. setTunnelTimeoutMs(300000); } // BEGIN ODO CHANGES private static final ThreadLocal<String> requestOriginalHostName = new ThreadLocal<String>(); private static final ThreadLocal<URI> requestOriginalURI = new ThreadLocal<URI>(); @Override /** * This is the original handleConnect from BrowserMobProxyHandler with the following changes: * * 1. Store the original URI in a ThreadLocal so that we can determine the host addr later * 2. Store the original hostname in a ThreadLocal so we don't need to do the same string processing again later * 2. Set the URI to 127.0.0.1 to pass into Odo * 3. Call the original handleConnect from SeleniumProxyHandler(copied to handle an Odo SslRelay) */ public void handleConnect(String pathInContext, String pathParams, HttpRequest request, HttpResponse response) throws HttpException, IOException { URI uri = request.getURI(); String original = uri.toString(); LOG.info("Hostname: " + original); String host = original; int colon = original.indexOf(':'); if (colon != -1) { host = original.substring(0, colon); } // store the original host name requestOriginalHostName.set(host); // make a copy of the URI(have to create a new URI otherwise things are copied by reference and get changed) URI realURI = new URI(request.getURI()); requestOriginalURI.set(realURI); // send requests to Odo HTTPS port int httpsPort = com.groupon.odo.proxylib.Utils.getSystemPort(Constants.SYS_HTTPS_PORT); uri.setURI("127.0.0.1:" + httpsPort); uri.setPort(httpsPort); handleConnectOriginal(pathInContext, pathParams, request, response); } // END ODO CHANGES // BEGIN ODO CHANGES /** * Copied from original SeleniumProxyHandler * Changed SslRelay to SslListener and getSslRelayOrCreateNew to getSslRelayOrCreateNewOdo * No other changes to the function * * @param pathInContext * @param pathParams * @param request * @param response * @throws HttpException * @throws IOException */ public void handleConnectOriginal(String pathInContext, String pathParams, HttpRequest request, HttpResponse response) throws HttpException, IOException { URI uri = request.getURI(); try { LOG.fine("CONNECT: " + uri); InetAddrPort addrPort; // When logging, we'll attempt to send messages to hosts that don't exist if (uri.toString().endsWith(".selenium.doesnotexist:443")) { // so we have to do set the host to be localhost (you can't new up an IAP with a non-existent hostname) addrPort = new InetAddrPort(443); } else { addrPort = new InetAddrPort(uri.toString()); } if (isForbidden(HttpMessage.__SSL_SCHEME, addrPort.getHost(), addrPort.getPort(), false)) { sendForbid(request, response, uri); } else { HttpConnection http_connection = request.getHttpConnection(); http_connection.forceClose(); HttpServer server = http_connection.getHttpServer(); SslListener listener = getSslRelayOrCreateNewOdo(uri, addrPort, server); int port = listener.getPort(); // Get the timeout int timeoutMs = 30000; Object maybesocket = http_connection.getConnection(); if (maybesocket instanceof Socket) { Socket s = (Socket) maybesocket; timeoutMs = s.getSoTimeout(); } // Create the tunnel HttpTunnel tunnel = newHttpTunnel(request, response, InetAddress.getByName(null), port, timeoutMs); if (tunnel != null) { // TODO - need to setup semi-busy loop for IE. if (_tunnelTimeoutMs > 0) { tunnel.getSocket().setSoTimeout(_tunnelTimeoutMs); if (maybesocket instanceof Socket) { Socket s = (Socket) maybesocket; s.setSoTimeout(_tunnelTimeoutMs); } } tunnel.setTimeoutMs(timeoutMs); customizeConnection(pathInContext, pathParams, request, tunnel.getSocket()); request.getHttpConnection().setHttpTunnel(tunnel); response.setStatus(HttpResponse.__200_OK); response.setContentLength(0); } request.setHandled(true); } } catch (Exception e) { LOG.fine("error during handleConnect", e); response.sendError(HttpResponse.__500_Internal_Server_Error, e.toString()); } } // END ODO CHANGES // BEGIN ODO CHANGES /** * This function wires up a SSL Listener with the cyber villians root CA and cert with the correct CNAME for the request * * @param host * @param listener */ protected X509Certificate wireUpSslWithCyberVilliansCAOdo(String host, SslListener listener) { host = requestOriginalHostName.get(); // Add cybervillians CA(from browsermob) try { // see https://github.com/webmetrics/browsermob-proxy/issues/105 String escapedHost = host.replace('*', '_'); KeyStoreManager keyStoreManager = Utils.getKeyStoreManager(escapedHost); keyStoreManager.getKeyStore().deleteEntry(KeyStoreManager._caPrivKeyAlias); keyStoreManager.persist(); listener.setKeystore(new File( "seleniumSslSupport" + File.separator + escapedHost + File.separator + "cybervillainsCA.jks") .getAbsolutePath()); return keyStoreManager.getCertificateByAlias(escapedHost); } catch (Exception e) { throw new RuntimeException(e); } } private SslRelayOdo getSslRelayOrCreateNewOdo(URI uri, InetAddrPort addrPort, HttpServer server) throws Exception { URI realURI = requestOriginalURI.get(); InetAddrPort realPort = new InetAddrPort(realURI.toString()); LOG.info("GETSSLRELAY: {}, {}", realURI, realPort); String host = new URL("https://" + realURI.toString()).getHost(); // create a host and port string so the listener sslMap can be keyed off the combination String hostAndPort = host.concat(String.valueOf(realPort.getPort())); LOG.info("getSSLRelay host: {}", hostAndPort); SslRelayOdo listener = null; synchronized (_sslMap) { listener = _sslMap.get(hostAndPort); // check the certificate expiration to see if we need to reload it if (listener != null) { Date exprDate = _certExpirationMap.get(hostAndPort); if (exprDate.before(new Date())) { // destroy the listener if (listener.getHttpServer() != null && listener.isStarted()) { listener.getHttpServer().removeListener(listener); } listener = null; } } // create the listener if it didn't exist if (listener == null) { listener = new SslRelayOdo(addrPort); listener.setNukeDirOrFile(null); _certExpirationMap.put(hostAndPort, wireUpSslWithCyberVilliansCAOdo(host, listener).getNotAfter()); listener.setPassword("password"); listener.setKeyPassword("password"); if (!listener.isStarted()) { server.addListener(listener); startRelayWithPortTollerance(server, listener, 1); } _sslMap.put(hostAndPort, listener); } } return listener; } // END ODO CHANGES // BEGIN ODO CHANGES // Changed method signature from SslRelay to SslListener // END ODO CHANGES private void startRelayWithPortTollerance(HttpServer server, SslListener relay, int tries) throws Exception { if (tries >= 5) { throw new BindException( "Unable to bind to several ports, most recently " + relay.getPort() + ". Giving up"); } try { if (server.isStarted()) { relay.start(); } else { throw new RuntimeException( "Can't start SslRelay: server is not started (perhaps it was just shut down?)"); } } catch (BindException e) { // doh - the port is being used up, let's pick a new port LOG.info("Unable to bind to port %d, going to try port %d now", relay.getPort(), relay.getPort() + 1); relay.setPort(relay.getPort() + 1); startRelayWithPortTollerance(server, relay, tries + 1); } } @Override protected HttpTunnel newHttpTunnel(HttpRequest httpRequest, HttpResponse httpResponse, InetAddress inetAddress, int i, int i1) throws IOException { // we're opening up a new tunnel, so let's make sure that the associated SslRelay (which may or may not be new) has the proper buffer settings adjustListenerBuffers(); return super.newHttpTunnel(httpRequest, httpResponse, inetAddress, i, i1); } /** * Returns a OkHttpClient that ignores SSL cert errors * @return */ private static OkHttpClient getUnsafeOkHttpClient() { try { // Create a trust manager that does not validate certificate chains final TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() { @Override public void checkClientTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException { } @Override public void checkServerTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException { } @Override public java.security.cert.X509Certificate[] getAcceptedIssuers() { return null; } } }; // Install the all-trusting trust manager final SSLContext sslContext = SSLContext.getInstance("SSL"); sslContext.init(null, trustAllCerts, new java.security.SecureRandom()); // Create an ssl socket factory with our all-trusting manager final SSLSocketFactory sslSocketFactory = sslContext.getSocketFactory(); OkHttpClient okHttpClient = new OkHttpClient(); okHttpClient.setSslSocketFactory(sslSocketFactory); okHttpClient.setHostnameVerifier(new HostnameVerifier() { @Override public boolean verify(String hostname, SSLSession session) { return true; } }); return okHttpClient; } catch (Exception e) { throw new RuntimeException(e); } } // ODO VERSION protected long proxyPlainTextRequest(final URL url, String pathInContext, String pathParams, HttpRequest request, final HttpResponse response) throws IOException { try { String urlStr = url.toString(); if (urlStr.toLowerCase().startsWith(Constants.ODO_INTERNAL_WEBAPP_URL)) { urlStr = "http://localhost:" + com.groupon.odo.proxylib.Utils.getSystemPort(Constants.SYS_HTTP_PORT) + "/odo"; } // setup okhttp to ignore ssl issues OkHttpClient okHttpClient = getUnsafeOkHttpClient(); okHttpClient.setFollowRedirects(false); okHttpClient.setFollowSslRedirects(false); Request.Builder okRequestBuilder = new Request.Builder(); /* * urlStr.indexOf(":") == urlStr.lastIndexOf(":") verifies that the url does not have a port * by checking it only has a : as part of http:// */ if (urlStr.startsWith("http://") && urlStr.indexOf(":") == urlStr.lastIndexOf(":")) { int httpPort = com.groupon.odo.proxylib.Utils.getSystemPort(Constants.SYS_HTTP_PORT); urlStr = urlStr.replace(getHostNameFromURL(urlStr), localIP + ":" + httpPort); } okRequestBuilder = okRequestBuilder.url(urlStr); // copy request headers Enumeration<?> enm = request.getFieldNames(); boolean isGet = "GET".equals(request.getMethod()); boolean hasContent = false; boolean usedContentLength = false; long contentLength = 0; while (enm.hasMoreElements()) { String hdr = (String) enm.nextElement(); if (!isGet && HttpFields.__ContentType.equals(hdr)) { hasContent = true; } if (!isGet && HttpFields.__ContentLength.equals(hdr)) { contentLength = Long.parseLong(request.getField(hdr)); usedContentLength = true; } Enumeration<?> vals = request.getFieldValues(hdr); while (vals.hasMoreElements()) { String val = (String) vals.nextElement(); if (val != null) { if (!isGet && HttpFields.__ContentLength.equals(hdr) && Integer.parseInt(val) > 0) { hasContent = true; } if (!_DontProxyHeaders.containsKey(hdr)) { okRequestBuilder = okRequestBuilder.addHeader(hdr, val); //httpReq.addRequestHeader(hdr, val); } } } } if ("GET".equals(request.getMethod())) { // don't need to do anything else } else if ("POST".equals(request.getMethod()) || "PUT".equals(request.getMethod()) || "DELETE".equals(request.getMethod())) { RequestBody okRequestBody = null; if (hasContent) { final String contentType = request.getContentType(); final byte[] bytes = IOUtils.toByteArray(request.getInputStream()); okRequestBody = new RequestBody() { @Override public MediaType contentType() { MediaType.parse(contentType); return null; } @Override public void writeTo(BufferedSink bufferedSink) throws IOException { bufferedSink.write(bytes); } }; // we need to add some ODO specific headers to give ODO a hint for content-length vs transfer-encoding // since okHTTP will automatically chunk even if the request was not chunked // this allows Odo to set the appropriate headers when the server request is made if (usedContentLength) { okRequestBuilder = okRequestBuilder.addHeader("ODO-POST-TYPE", "content-length:" + contentLength); } } else { okRequestBody = RequestBody.create(null, new byte[0]); } if ("POST".equals(request.getMethod())) { okRequestBuilder = okRequestBuilder.post(okRequestBody); } else if ("PUT".equals(request.getMethod())) { okRequestBuilder = okRequestBuilder.put(okRequestBody); } else if ("DELETE".equals(request.getMethod())) { okRequestBuilder = okRequestBuilder.delete(okRequestBody); } } else if ("OPTIONS".equals(request.getMethod())) { // NOT SUPPORTED } else if ("HEAD".equals(request.getMethod())) { okRequestBuilder = okRequestBuilder.head(); } else { LOG.warn("Unexpected request method %s, giving up", request.getMethod()); request.setHandled(true); return -1; } Request okRequest = okRequestBuilder.build(); Response okResponse = okHttpClient.newCall(okRequest).execute(); // Set status and response message response.setStatus(okResponse.code()); response.setReason(okResponse.message()); // copy response headers for (int headerNum = 0; headerNum < okResponse.headers().size(); headerNum++) { String headerName = okResponse.headers().name(headerNum); if (!_DontProxyHeaders.containsKey(headerName) && !_ProxyAuthHeaders.containsKey(headerName)) { response.addField(headerName, okResponse.headers().value(headerNum)); } } // write output to response output stream try { IOUtils.copy(okResponse.body().byteStream(), response.getOutputStream()); } catch (Exception e) { // ignoring this until we refactor the proxy // The copy occasionally fails due to an issue where okResponse has more data in the body than it's supposed to // The client still gets all of the data it was expecting } request.setHandled(true); return okResponse.body().contentLength(); } catch (Exception e) { LOG.warn("Caught exception proxying: ", e); reportError(e, url, response); request.setHandled(true); return -1; } } private static void reportError(Exception e, URL url, HttpResponse response) { FirefoxErrorContent error = FirefoxErrorContent.GENERIC; if (e instanceof UnknownHostException) { error = FirefoxErrorContent.DNS_NOT_FOUND; } else if (e instanceof ConnectException) { error = FirefoxErrorContent.CONN_FAILURE; } else if (e instanceof ConnectTimeoutException) { error = FirefoxErrorContent.NET_TIMEOUT; } else if (e instanceof NoHttpResponseException) { error = FirefoxErrorContent.NET_RESET; } else if (e instanceof EOFException) { error = FirefoxErrorContent.NET_INTERRUPT; } else if (e instanceof IllegalArgumentException && e.getMessage().startsWith("Host name may not be null")) { error = FirefoxErrorContent.DNS_NOT_FOUND; } else if (e instanceof BadURIException) { error = FirefoxErrorContent.MALFORMED_URI; } else if (e instanceof SSLProtocolException) { return; } String shortDesc = String.format(error.getShortDesc(), url.getHost()); String text = String.format(FirefoxErrorConstants.ERROR_PAGE, error.getTitle(), shortDesc, error.getLongDesc()); try { response.setStatus(HttpResponse.__502_Bad_Gateway); response.setContentLength(text.length()); response.getOutputStream().write(text.getBytes()); } catch (IOException e1) { LOG.warn("IOException while trying to report an HTTP error"); } } public void setJettyServer(Server jettyServer) { this.jettyServer = jettyServer; } public void adjustListenerBuffers() { // configure the listeners to have larger buffers. We do this because we've seen cases where the header is // too large. Normally this would happen on "meaningless" JS includes for ad networks, but we eventually saw // it in a way that caused a Selenium script not to work due to too many headers (see tom.schwenk@musictoday.com) HttpListener[] listeners = jettyServer.getListeners(); for (HttpListener listener : listeners) { if (listener instanceof SocketListener) { SocketListener sl = (SocketListener) listener; if (sl.getBufferReserve() != 512 * headerBufferMultiplier) { sl.setBufferReserve(512 * headerBufferMultiplier); } if (sl.getBufferSize() != 8192 * headerBufferMultiplier) { sl.setBufferSize(8192 * headerBufferMultiplier); } } } } // BEGIN ODO CHANGES /** * Cleanup function to remove all allocated listeners */ public void cleanup() { synchronized (_sslMap) { for (SslRelayOdo relay : _sslMap.values()) { if (relay.getHttpServer() != null && relay.isStarted()) { relay.getHttpServer().removeListener(relay); } } sslRelays.clear(); } } // END ODO CHANGES // BEGIN ODO CHANGES // Copied from SeleniumProxyHandler(renamed to SslRelayOdo from SslRelay; no other changes) public static class SslRelayOdo extends SslListener { InetAddrPort _addr; File nukeDirOrFile; private static final long serialVersionUID = 1L; SslRelayOdo(InetAddrPort addr) { _addr = addr; } public void setNukeDirOrFile(File nukeDirOrFile) { this.nukeDirOrFile = nukeDirOrFile; } protected void customizeRequest(Socket socket, HttpRequest request) { super.customizeRequest(socket, request); URI uri = request.getURI(); // Convert the URI to a proxy URL // // NOTE: Don't just add a host + port to the request URI, since this causes the URI to // get "dirty" and be rewritten, potentially breaking the proxy slightly. Instead, // create a brand new URI that includes the protocol, the host, and the port, but leaves // intact the path + query string "as is" so that it does not get rewritten. request.setURI(new URI("https://" + _addr.getHost() + ":" + _addr.getPort() + uri.toString())); } public void stop() throws InterruptedException { super.stop(); if (nukeDirOrFile != null) { if (nukeDirOrFile.isDirectory()) { LauncherUtils.recursivelyDeleteDir(nukeDirOrFile); } else { nukeDirOrFile.delete(); } } } } /** * @param url full url containing hostname * @return hostname */ public static String getHostNameFromURL(String url) { int urlLeftPos = url.indexOf("//"); String hostName = url.substring(urlLeftPos + 2); int urlRightPos = hostName.indexOf("/"); if (urlRightPos != -1) { hostName = hostName.substring(0, urlRightPos); } // now look for a port int portPos = hostName.indexOf(":"); if (portPos != -1) { hostName = hostName.substring(0, portPos); } return hostName; } // END ODO CHANGES }