Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.jmeter.protocol.http.sampler; import java.io.BufferedInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.net.BindException; import java.net.HttpURLConnection; import java.net.InetSocketAddress; import java.net.Proxy; import java.net.URL; import java.net.URLConnection; import java.util.List; import java.util.Map; import java.util.zip.GZIPInputStream; import org.apache.commons.io.input.CountingInputStream; import org.apache.jmeter.protocol.http.control.AuthManager; import org.apache.jmeter.protocol.http.control.Authorization; import org.apache.jmeter.protocol.http.control.CacheManager; import org.apache.jmeter.protocol.http.control.CookieManager; import org.apache.jmeter.protocol.http.control.Header; import org.apache.jmeter.protocol.http.control.HeaderManager; import org.apache.jmeter.protocol.http.util.HTTPConstants; import org.apache.jmeter.samplers.SampleResult; import org.apache.jmeter.testelement.property.CollectionProperty; import org.apache.jmeter.testelement.property.PropertyIterator; import org.apache.jmeter.util.JMeterUtils; import org.apache.jmeter.util.SSLManager; import org.apache.jorphan.logging.LoggingManager; import org.apache.log.Logger; /** * A sampler which understands all the parts necessary to read statistics about * HTTP requests, including cookies and authentication. * */ public class HTTPJavaImplClassifier extends HTTPAbstractImplClassifier { private static final boolean OBEY_CONTENT_LENGTH = JMeterUtils.getPropDefault("httpsampler.obey_contentlength", false); // $NON-NLS-1$ private static final Logger log = LoggingManager.getLoggerForClass(); private static final int MAX_CONN_RETRIES = JMeterUtils.getPropDefault("http.java.sampler.retries" // $NON-NLS-1$ , 10); // Maximum connection retries static { log.info("Maximum connection retries = " + MAX_CONN_RETRIES); // $NON-NLS-1$ // Temporary copies, so can set the final ones } private static final byte[] NULL_BA = new byte[0];// can share these /** Handles writing of a post or put request */ private transient PostWriterClassifier postOrPutWriter; private volatile HttpURLConnection savedConn; protected HTTPJavaImplClassifier(HTTPSamplerBaseClassifier base) { super(base); } /** * Set request headers in preparation to opening a connection. * * @param conn * <code>URLConnection</code> to set headers on * @exception IOException * if an I/O exception occurs */ protected void setPostHeaders(URLConnection conn) throws IOException { postOrPutWriter = new PostWriterClassifier(); postOrPutWriter.setHeaders(conn, testElement); } private void setPutHeaders(URLConnection conn) throws IOException { postOrPutWriter = new PutWriterClassifier(); postOrPutWriter.setHeaders(conn, testElement); } /** * Send POST data from <code>Entry</code> to the open connection. This also * handles sending data for PUT requests * * @param connection * <code>URLConnection</code> where POST data should be sent * @return a String show what was posted. Will not contain actual file * upload content * @exception IOException * if an I/O exception occurs */ protected String sendPostData(URLConnection connection) throws IOException { return postOrPutWriter.sendPostData(connection, testElement); } private String sendPutData(URLConnection connection) throws IOException { return postOrPutWriter.sendPostData(connection, testElement); } /** * Returns an <code>HttpURLConnection</code> fully ready to attempt * connection. This means it sets the request method (GET or POST), headers, * cookies, and authorization for the URL request. * <p> * The request infos are saved into the sample result if one is provided. * * @param u * <code>URL</code> of the URL request * @param method * GET, POST etc * @param res * sample result to save request infos to * @return <code>HttpURLConnection</code> ready for .connect * @exception IOException * if an I/O Exception occurs */ protected HttpURLConnection setupConnection(URL u, String method, HTTPSampleResult res) throws IOException { SSLManager sslmgr = null; if (HTTPConstants.PROTOCOL_HTTPS.equalsIgnoreCase(u.getProtocol())) { try { sslmgr = SSLManager.getInstance(); // N.B. this needs to be done // before opening the // connection } catch (Exception e) { log.warn("Problem creating the SSLManager: ", e); } } final HttpURLConnection conn; final String proxyHost = getProxyHost(); final int proxyPort = getProxyPortInt(); if (proxyHost.length() > 0 && proxyPort > 0) { Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(proxyHost, proxyPort)); // TODO - how to define proxy authentication for a single // connection? // It's not clear if this is possible // String user = getProxyUser(); // if (user.length() > 0){ // Authenticator auth = new ProxyAuthenticator(user, // getProxyPass()); // } conn = (HttpURLConnection) u.openConnection(proxy); } else { conn = (HttpURLConnection) u.openConnection(); } // Update follow redirects setting just for this connection conn.setInstanceFollowRedirects(getAutoRedirects()); int cto = getConnectTimeout(); if (cto > 0) { conn.setConnectTimeout(cto); } int rto = getResponseTimeout(); if (rto > 0) { conn.setReadTimeout(rto); } if (HTTPConstants.PROTOCOL_HTTPS.equalsIgnoreCase(u.getProtocol())) { try { if (null != sslmgr) { sslmgr.setContext(conn); // N.B. must be done after opening // connection } } catch (Exception e) { log.warn("Problem setting the SSLManager for the connection: ", e); } } // a well-bahaved browser is supposed to send 'Connection: close' // with the last request to an HTTP server. Instead, most browsers // leave it to the server to close the connection after their // timeout period. Leave it to the JMeter user to decide. if (getUseKeepAlive()) { conn.setRequestProperty(HTTPConstants.HEADER_CONNECTION, HTTPConstants.KEEP_ALIVE); } else { conn.setRequestProperty(HTTPConstants.HEADER_CONNECTION, HTTPConstants.CONNECTION_CLOSE); } conn.setRequestMethod(method); setConnectionHeaders(conn, u, getHeaderManager(), getCacheManager()); String cookies = setConnectionCookie(conn, u, getCookieManager()); setConnectionAuthorization(conn, u, getAuthManager()); if (method.equals(HTTPConstants.POST)) { setPostHeaders(conn); } else if (method.equals(HTTPConstants.PUT)) { setPutHeaders(conn); } if (res != null) { res.setRequestHeaders(getConnectionHeaders(conn)); res.setCookies(cookies); } return conn; } /** * Reads the response from the URL connection. * * @param conn * URL from which to read response * @return response content * @exception IOException * if an I/O exception occurs */ protected byte[] readResponse(HttpURLConnection conn, SampleResult res) throws IOException { BufferedInputStream in; final int contentLength = conn.getContentLength(); if ((contentLength == 0) && OBEY_CONTENT_LENGTH) { log.info("Content-Length: 0, not reading http-body"); res.setResponseHeaders(getResponseHeaders(conn)); res.latencyEnd(); return NULL_BA; } // works OK even if ContentEncoding is null boolean gzipped = HTTPConstants.ENCODING_GZIP.equals(conn.getContentEncoding()); InputStream instream = null; try { instream = new CountingInputStream(conn.getInputStream()); if (gzipped) { in = new BufferedInputStream(new GZIPInputStream(instream)); } else { in = new BufferedInputStream(instream); } } catch (IOException e) { if (!(e.getCause() instanceof FileNotFoundException)) { log.error("readResponse: " + e.toString()); Throwable cause = e.getCause(); if (cause != null) { log.error("Cause: " + cause); if (cause instanceof Error) { throw (Error) cause; } } } // Normal InputStream is not available InputStream errorStream = conn.getErrorStream(); if (errorStream == null) { log.info("Error Response Code: " + conn.getResponseCode() + ", Server sent no Errorpage"); res.setResponseHeaders(getResponseHeaders(conn)); res.latencyEnd(); return NULL_BA; } log.info("Error Response Code: " + conn.getResponseCode()); if (gzipped) { in = new BufferedInputStream(new GZIPInputStream(errorStream)); } else { in = new BufferedInputStream(errorStream); } } catch (Exception e) { log.error("readResponse: " + e.toString()); Throwable cause = e.getCause(); if (cause != null) { log.error("Cause: " + cause); if (cause instanceof Error) { throw (Error) cause; } } in = new BufferedInputStream(conn.getErrorStream()); } // N.B. this closes 'in' byte[] responseData = readResponse(res, in, contentLength); if (instream != null) { res.setBodySize(((CountingInputStream) instream).getCount()); instream.close(); } return responseData; } /** * Gets the ResponseHeaders from the URLConnection * * @param conn * connection from which the headers are read * @return string containing the headers, one per line */ protected String getResponseHeaders(HttpURLConnection conn) { StringBuilder headerBuf = new StringBuilder(); headerBuf.append(conn.getHeaderField(0));// Leave header as is // headerBuf.append(conn.getHeaderField(0).substring(0, 8)); // headerBuf.append(" "); // headerBuf.append(conn.getResponseCode()); // headerBuf.append(" "); // headerBuf.append(conn.getResponseMessage()); headerBuf.append("\n"); //$NON-NLS-1$ String hfk; for (int i = 1; (hfk = conn.getHeaderFieldKey(i)) != null; i++) { headerBuf.append(hfk); headerBuf.append(": "); // $NON-NLS-1$ headerBuf.append(conn.getHeaderField(i)); headerBuf.append("\n"); // $NON-NLS-1$ } return headerBuf.toString(); } /** * Extracts all the required cookies for that particular URL request and * sets them in the <code>HttpURLConnection</code> passed in. * * @param conn * <code>HttpUrlConnection</code> which represents the URL * request * @param u * <code>URL</code> of the URL request * @param cookieManager * the <code>CookieManager</code> containing all the cookies for * this <code>UrlConfig</code> */ private String setConnectionCookie(HttpURLConnection conn, URL u, CookieManager cookieManager) { String cookieHeader = null; if (cookieManager != null) { cookieHeader = cookieManager.getCookieHeaderForURL(u); if (cookieHeader != null) { conn.setRequestProperty(HTTPConstants.HEADER_COOKIE, cookieHeader); } } return cookieHeader; } /** * Extracts all the required headers for that particular URL request and * sets them in the <code>HttpURLConnection</code> passed in * * @param conn * <code>HttpUrlConnection</code> which represents the URL * request * @param u * <code>URL</code> of the URL request * @param headerManager * the <code>HeaderManager</code> containing all the cookies for * this <code>UrlConfig</code> * @param cacheManager * the CacheManager (may be null) */ private void setConnectionHeaders(HttpURLConnection conn, URL u, HeaderManager headerManager, CacheManager cacheManager) { // Add all the headers from the HeaderManager if (headerManager != null) { CollectionProperty headers = headerManager.getHeaders(); if (headers != null) { PropertyIterator i = headers.iterator(); while (i.hasNext()) { Header header = (Header) i.next().getObjectValue(); String n = header.getName(); String v = header.getValue(); conn.addRequestProperty(n, v); } } } if (cacheManager != null) { cacheManager.setHeaders(conn, u); } } /** * Get all the headers for the <code>HttpURLConnection</code> passed in * * @param conn * <code>HttpUrlConnection</code> which represents the URL * request * @return the headers as a string */ private String getConnectionHeaders(HttpURLConnection conn) { // Get all the request properties, which are the headers set on the // connection StringBuilder hdrs = new StringBuilder(100); Map<String, List<String>> requestHeaders = conn.getRequestProperties(); for (Map.Entry<String, List<String>> entry : requestHeaders.entrySet()) { String headerKey = entry.getKey(); // Exclude the COOKIE header, since cookie is reported separately in // the sample if (!HTTPConstants.HEADER_COOKIE.equalsIgnoreCase(headerKey)) { // value is a List of Strings for (String value : entry.getValue()) { hdrs.append(headerKey); hdrs.append(": "); // $NON-NLS-1$ hdrs.append(value); hdrs.append("\n"); // $NON-NLS-1$ } } } return hdrs.toString(); } /** * Extracts all the required authorization for that particular URL request * and sets it in the <code>HttpURLConnection</code> passed in. * * @param conn * <code>HttpUrlConnection</code> which represents the URL * request * @param u * <code>URL</code> of the URL request * @param authManager * the <code>AuthManager</code> containing all the cookies for * this <code>UrlConfig</code> */ private void setConnectionAuthorization(HttpURLConnection conn, URL u, AuthManager authManager) { if (authManager != null) { Authorization auth = authManager.getAuthForURL(u); if (auth != null) { conn.setRequestProperty(HTTPConstants.HEADER_AUTHORIZATION, auth.toBasicHeader()); } } } /** * Samples the URL passed in and stores the result in * <code>HTTPSampleResult</code>, following redirects and downloading page * resources as appropriate. * <p> * When getting a redirect target, redirects are not followed and resources * are not downloaded. The caller will take care of this. * * @param url * URL to sample * @param method * HTTP method: GET, POST,... * @param areFollowingRedirect * whether we're getting a redirect target * @param frameDepth * Depth of this target in the frame structure. Used only to * prevent infinite recursion. * @return results of the sampling */ protected HTTPSampleResult sample(URL url, String method, boolean areFollowingRedirect, int frameDepth) { HttpURLConnection conn = null; String urlStr = url.toString(); log.debug("Start : sample " + urlStr); HTTPSampleResult res = new HTTPSampleResult(); res.setMonitor(isMonitor()); res.setSampleLabel(urlStr); res.setURL(url); res.setHTTPMethod(method); res.sampleStart(); // Count the retries as well in the time // Check cache for an entry with an Expires header in the future final CacheManager cacheManager = getCacheManager(); if (cacheManager != null && HTTPConstants.GET.equalsIgnoreCase(method)) { if (cacheManager.inCache(url)) { res.sampleEnd(); res.setResponseNoContent(); res.setSuccessful(true); return res; } } try { // Sampling proper - establish the connection and read the response: // Repeatedly try to connect: int retry; // Start with 0 so tries at least once, and retries at most // MAX_CONN_RETRIES times for (retry = 0; retry <= MAX_CONN_RETRIES; retry++) { try { conn = setupConnection(url, method, res); // Attempt the connection: savedConn = conn; conn.connect(); break; } catch (BindException e) { if (retry >= MAX_CONN_RETRIES) { log.error("Can't connect after " + retry + " retries, " + e); throw e; } log.debug("Bind exception, try again"); if (conn != null) { savedConn = null; // we don't want interrupt to try // disconnection again conn.disconnect(); } setUseKeepAlive(false); continue; // try again } catch (IOException e) { log.debug("Connection failed, giving up"); throw e; } } if (retry > MAX_CONN_RETRIES) { // This should never happen, but... throw new BindException(); } // Nice, we've got a connection. Finish sending the request: if (method.equals(HTTPConstants.POST)) { String postBody = sendPostData(conn); res.setQueryString(postBody); } else if (method.equals(HTTPConstants.PUT)) { String putBody = sendPutData(conn); res.setQueryString(putBody); } // Request sent. Now get the response: byte[] responseData = readResponse(conn, res); res.sampleEnd(); // Done with the sampling proper. // Now collect the results into the HTTPSampleResult: res.setResponseData(responseData); @SuppressWarnings("null") // Cannot be null here int errorLevel = conn.getResponseCode(); String respMsg = conn.getResponseMessage(); String hdr = conn.getHeaderField(0); if (hdr == null) { hdr = "(null)"; // $NON-NLS-1$ } if (errorLevel == -1) {// Bug 38902 - sometimes -1 seems to be // returned unnecessarily if (respMsg != null) {// Bug 41902 - NPE try { errorLevel = Integer.parseInt(respMsg.substring(0, 3)); log.warn("ResponseCode==-1; parsed " + respMsg + " as " + errorLevel); } catch (NumberFormatException e) { log.warn("ResponseCode==-1; could not parse " + respMsg + " hdr: " + hdr); } } else { respMsg = hdr; // for result log.warn("ResponseCode==-1 & null ResponseMessage. Header(0)= " + hdr); } } if (errorLevel == -1) { res.setResponseCode("(null)"); // $NON-NLS-1$ } else { res.setResponseCode(Integer.toString(errorLevel)); } res.setSuccessful(isSuccessCode(errorLevel)); if (respMsg == null) {// has been seen in a redirect respMsg = hdr; // use header (if possible) if no message found } res.setResponseMessage(respMsg); String ct = conn.getContentType(); if (ct != null) { res.setContentType(ct);// e.g. text/html; charset=ISO-8859-1 res.setEncodingAndType(ct); } String responseHeaders = getResponseHeaders(conn); res.setResponseHeaders(responseHeaders); if (res.isRedirect()) { res.setRedirectLocation(conn.getHeaderField(HTTPConstants.HEADER_LOCATION)); } // record headers size to allow HTTPSampleResult.getBytes() with // different options res.setHeadersSize(responseHeaders.replaceAll("\n", "\r\n") // $NON-NLS-1$ // $NON-NLS-2$ .length() + 2); // add 2 for a '\r\n' at end of headers // (before data) if (log.isDebugEnabled()) { log.debug("Response headersSize=" + res.getHeadersSize() + " bodySize=" + res.getBodySize() + " Total=" + (res.getHeadersSize() + res.getBodySize())); } // If we redirected automatically, the URL may have changed if (getAutoRedirects()) { res.setURL(conn.getURL()); } // Store any cookies received in the cookie manager: saveConnectionCookies(conn, url, getCookieManager()); // Save cache information if (cacheManager != null) { cacheManager.saveDetails(conn, res); } res = resultProcessing(areFollowingRedirect, frameDepth, res); log.debug("End : sample"); return res; } catch (IOException e) { res.sampleEnd(); savedConn = null; // we don't want interrupt to try disconnection // again // We don't want to continue using this connection, even if // KeepAlive is set if (conn != null) { // May not exist conn.disconnect(); } conn = null; // Don't process again return errorResult(e, res); } finally { // calling disconnect doesn't close the connection immediately, // but indicates we're through with it. The JVM should close // it when necessary. savedConn = null; // we don't want interrupt to try disconnection // again disconnect(conn); // Disconnect unless using KeepAlive } } protected void disconnect(HttpURLConnection conn) { if (conn != null) { String connection = conn.getHeaderField(HTTPConstants.HEADER_CONNECTION); String protocol = conn.getHeaderField(0); if ((connection == null && (protocol == null || !protocol.startsWith(HTTPConstants.HTTP_1_1))) || (connection != null && connection.equalsIgnoreCase(HTTPConstants.CONNECTION_CLOSE))) { conn.disconnect(); } // TODO ? perhaps note connection so it can be disconnected at end // of test? } } /** * From the <code>HttpURLConnection</code>, store all the "set-cookie" * key-pair values in the cookieManager of the <code>UrlConfig</code>. * * @param conn * <code>HttpUrlConnection</code> which represents the URL * request * @param u * <code>URL</code> of the URL request * @param cookieManager * the <code>CookieManager</code> containing all the cookies for * this <code>UrlConfig</code> */ private void saveConnectionCookies(HttpURLConnection conn, URL u, CookieManager cookieManager) { if (cookieManager != null) { for (int i = 1; conn.getHeaderFieldKey(i) != null; i++) { if (conn.getHeaderFieldKey(i).equalsIgnoreCase(HTTPConstants.HEADER_SET_COOKIE)) { cookieManager.addCookieFromHeader(conn.getHeaderField(i), u); } } } } /** {@inheritDoc} */ public boolean interrupt() { HttpURLConnection conn = savedConn; if (conn != null) { savedConn = null; conn.disconnect(); } return conn != null; } }