Source Code Cross Referenced for HttpClient.java in  » ERP-CRM-Financial » SourceTap-CRM » org » ofbiz » base » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » ERP CRM Financial » SourceTap CRM » org.ofbiz.base.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $Id: HttpClient.java,v 1.4 2003/11/13 04:19:31 ajzeneski Exp $
003:         *
004:         *  Copyright (c) 2001, 2002 The Open For Business Project - www.ofbiz.org
005:         *
006:         *  Permission is hereby granted, free of charge, to any person obtaining a
007:         *  copy of this software and associated documentation files (the "Software"),
008:         *  to deal in the Software without restriction, including without limitation
009:         *  the rights to use, copy, modify, merge, publish, distribute, sublicense,
010:         *  and/or sell copies of the Software, and to permit persons to whom the
011:         *  Software is furnished to do so, subject to the following conditions:
012:         *
013:         *  The above copyright notice and this permission notice shall be included
014:         *  in all copies or substantial portions of the Software.
015:         *
016:         *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
017:         *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
018:         *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
019:         *  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
020:         *  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
021:         *  OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
022:         *  THE USE OR OTHER DEALINGS IN THE SOFTWARE.
023:         */
024:        package org.ofbiz.base.util;
025:
026:        import java.io.BufferedReader;
027:        import java.io.DataOutputStream;
028:        import java.io.IOException;
029:        import java.io.InputStream;
030:        import java.io.InputStreamReader;
031:        import java.net.HttpURLConnection;
032:        import java.net.URL;
033:        import java.net.URLConnection;
034:        import java.util.HashMap;
035:        import java.util.Iterator;
036:        import java.util.Map;
037:        import java.util.Set;
038:
039:        /**
040:         * Send HTTP GET/POST requests.
041:         *
042:         * @author     <a href="mailto:jaz@ofbiz.org">Andy Zeneski</a>
043:         * @version    $Revision: 1.4 $
044:         * @since      2.0
045:         */
046:        public class HttpClient {
047:
048:            public static final String module = HttpClient.class.getName();
049:
050:            private int timeout = 30000;
051:            private boolean debug = false;
052:            private boolean lineFeed = true;
053:            private boolean followRedirects = true;
054:
055:            private String url = null;
056:            private String rawStream = null;
057:            private String clientCertAlias = null;
058:            private Map parameters = null;
059:            private Map headers = null;
060:
061:            private URL requestUrl = null;
062:            private URLConnection con = null;
063:
064:            /** Creates an empty HttpClient object. */
065:            public HttpClient() {
066:            }
067:
068:            /** Creates a new HttpClient object. */
069:            public HttpClient(URL url) {
070:                this .url = url.toExternalForm();
071:            }
072:
073:            /** Creates a new HttpClient object. */
074:            public HttpClient(String url) {
075:                this .url = url;
076:            }
077:
078:            /** Creates a new HttpClient object. */
079:            public HttpClient(String url, Map parameters) {
080:                this .url = url;
081:                this .parameters = parameters;
082:            }
083:
084:            /** Creates a new HttpClient object. */
085:            public HttpClient(URL url, Map parameters) {
086:                this .url = url.toExternalForm();
087:                this .parameters = parameters;
088:            }
089:
090:            /** Creates a new HttpClient object. */
091:            public HttpClient(String url, Map parameters, Map headers) {
092:                this .url = url;
093:                this .parameters = parameters;
094:                this .headers = headers;
095:            }
096:
097:            /** Creates a new HttpClient object. */
098:            public HttpClient(URL url, Map parameters, Map headers) {
099:                this .url = url.toExternalForm();
100:                this .parameters = parameters;
101:                this .headers = headers;
102:            }
103:
104:            /** When true overrides Debug.verboseOn() and forces debugging for this instance */
105:            public void setDebug(boolean debug) {
106:                this .debug = debug;
107:            }
108:
109:            /** Sets the timeout for waiting for the connection (default 30sec) */
110:            public void setTimeout(int timeout) {
111:                this .timeout = timeout;
112:            }
113:
114:            /** Enables this request to follow redirect 3xx codes (default true) */
115:            public void followRedirects(boolean followRedirects) {
116:                this .followRedirects = followRedirects;
117:            }
118:
119:            /** Turns on or off line feeds in the request. (default is on) */
120:            public void setLineFeed(boolean lineFeed) {
121:                this .lineFeed = lineFeed;
122:            }
123:
124:            /** Set the raw stream for posts. */
125:            public void setRawStream(String stream) {
126:                this .rawStream = stream;
127:            }
128:
129:            /** Set the URL for this request. */
130:            public void setUrl(URL url) {
131:                this .url = url.toExternalForm();
132:            }
133:
134:            /** Set the URL for this request. */
135:            public void setUrl(String url) {
136:                this .url = url;
137:            }
138:
139:            /** Set the parameters for this request. */
140:            public void setParameters(Map parameters) {
141:                this .parameters = parameters;
142:            }
143:
144:            /** Set an individual parameter for this request. */
145:            public void setParameter(String name, String value) {
146:                if (parameters == null)
147:                    parameters = new HashMap();
148:                parameters.put(name, value);
149:            }
150:
151:            /** Set the headers for this request. */
152:            public void setHeaders(Map headers) {
153:                this .headers = headers;
154:            }
155:
156:            /** Set an individual header for this request. */
157:            public void setHeader(String name, String value) {
158:                if (headers == null)
159:                    headers = new HashMap();
160:                headers.put(name, value);
161:            }
162:
163:            /** Return a Map of headers. */
164:            public Map getHeaders() {
165:                return headers;
166:            }
167:
168:            /** Return a Map of parameters. */
169:            public Map getParameters() {
170:                return parameters;
171:            }
172:
173:            /** Return a string representing the requested URL. */
174:            public String getUrl() {
175:                return url;
176:            }
177:
178:            /** Sets the client certificate alias (from the keystore) to use for this SSL connection. */
179:            public void setClientCertificateAlias(String alias) {
180:                this .clientCertAlias = alias;
181:            }
182:
183:            /** Returns the alias of the client certificate to be used for this SSL connection. */
184:            public String getClientCertificateAlias() {
185:                return this .clientCertAlias;
186:            }
187:
188:            /** Invoke HTTP request GET. */
189:            public String get() throws HttpClientException {
190:                return sendHttpRequest("get");
191:            }
192:
193:            /** Invoke HTTP request GET. */
194:            public InputStream getStream() throws HttpClientException {
195:                return sendHttpRequestStream("get");
196:            }
197:
198:            /** Invoke HTTP request POST. */
199:            public String post() throws HttpClientException {
200:                return sendHttpRequest("post");
201:            }
202:
203:            /** Invoke HTTP request POST and pass raw stream. */
204:            public String post(String stream) throws HttpClientException {
205:                this .rawStream = stream;
206:                return sendHttpRequest("post");
207:            }
208:
209:            /** Invoke HTTP request POST. */
210:            public InputStream postStream() throws HttpClientException {
211:                return sendHttpRequestStream("post");
212:            }
213:
214:            /** Returns the value of the specified named response header field. */
215:            public String getResponseHeader(String header)
216:                    throws HttpClientException {
217:                if (con == null) {
218:                    throw new HttpClientException(
219:                            "Connection not yet established");
220:                }
221:                return con.getHeaderField(header);
222:            }
223:
224:            /** Returns the key for the nth response header field. */
225:            public String getResponseHeaderFieldKey(int n)
226:                    throws HttpClientException {
227:                if (con == null) {
228:                    throw new HttpClientException(
229:                            "Connection not yet established");
230:                }
231:                return con.getHeaderFieldKey(n);
232:            }
233:
234:            /** Returns the value for the nth response header field. It returns null of there are fewer then n fields. */
235:            public String getResponseHeaderField(int n)
236:                    throws HttpClientException {
237:                if (con == null) {
238:                    throw new HttpClientException(
239:                            "Connection not yet established");
240:                }
241:                return con.getHeaderField(n);
242:            }
243:
244:            /** Returns the content of the response. */
245:            public Object getResponseContent() throws java.io.IOException,
246:                    HttpClientException {
247:                if (con == null) {
248:                    throw new HttpClientException(
249:                            "Connection not yet established");
250:                }
251:                return con.getContent();
252:            }
253:
254:            /** Returns the content-type of the response. */
255:            public String getResponseContentType() throws HttpClientException {
256:                if (con == null) {
257:                    throw new HttpClientException(
258:                            "Connection not yet established");
259:                }
260:                return con.getContentType();
261:            }
262:
263:            /** Returns the content length of the response */
264:            public int getResponseContentLength() throws HttpClientException {
265:                if (con == null) {
266:                    throw new HttpClientException(
267:                            "Connection not yet established");
268:                }
269:                return con.getContentLength();
270:            }
271:
272:            /** Returns the content encoding of the response. */
273:            public String getResponseContentEncoding()
274:                    throws HttpClientException {
275:                if (con == null) {
276:                    throw new HttpClientException(
277:                            "Connection not yet established");
278:                }
279:                return con.getContentEncoding();
280:            }
281:
282:            private String sendHttpRequest(String method)
283:                    throws HttpClientException {
284:                InputStream in = sendHttpRequestStream(method);
285:                if (in == null)
286:                    return null;
287:
288:                StringBuffer buf = new StringBuffer();
289:                try {
290:                    if (Debug.verboseOn() || debug) {
291:                        try {
292:                            Debug.log("ContentEncoding: "
293:                                    + con.getContentEncoding()
294:                                    + "; ContentType: "
295:                                    + con.getContentType()
296:                                    + " or: "
297:                                    + URLConnection
298:                                            .guessContentTypeFromStream(in),
299:                                    module);
300:                        } catch (IOException ioe) {
301:                            Debug
302:                                    .logWarning(
303:                                            ioe,
304:                                            "Caught exception printing content debugging information",
305:                                            module);
306:                        }
307:                    }
308:
309:                    String charset = null;
310:                    String contentType = con.getContentType();
311:                    if (contentType == null) {
312:                        try {
313:                            contentType = URLConnection
314:                                    .guessContentTypeFromStream(in);
315:                        } catch (IOException ioe) {
316:                            Debug
317:                                    .logWarning(
318:                                            ioe,
319:                                            "Problems guessing content type from steam",
320:                                            module);
321:                        }
322:                    }
323:
324:                    if (Debug.verboseOn() || debug)
325:                        Debug.log("Content-Type: " + contentType, module);
326:
327:                    if (contentType != null) {
328:                        contentType = contentType.toUpperCase();
329:                        int charsetEqualsLoc = contentType.indexOf("=",
330:                                contentType.indexOf("CHARSET"));
331:                        int afterSemiColon = contentType.indexOf(";",
332:                                charsetEqualsLoc);
333:                        if (charsetEqualsLoc >= 0 && afterSemiColon >= 0) {
334:                            charset = contentType.substring(
335:                                    charsetEqualsLoc + 1, afterSemiColon);
336:                        } else if (charsetEqualsLoc >= 0) {
337:                            charset = contentType
338:                                    .substring(charsetEqualsLoc + 1);
339:                        }
340:
341:                        if (charset != null)
342:                            charset = charset.trim();
343:                        if (Debug.verboseOn() || debug)
344:                            Debug.log(
345:                                    "Getting text from HttpClient with charset: "
346:                                            + charset, module);
347:                    }
348:
349:                    BufferedReader post = new BufferedReader(
350:                            charset == null ? new InputStreamReader(in)
351:                                    : new InputStreamReader(in, charset));
352:                    String line = new String();
353:
354:                    if (Debug.verboseOn() || debug)
355:                        Debug.log("---- HttpClient Response Content ----",
356:                                module);
357:                    while ((line = post.readLine()) != null) {
358:                        if (Debug.verboseOn() || debug)
359:                            Debug.log("[HttpClient] : " + line, module);
360:                        buf.append(line);
361:                        if (lineFeed) {
362:                            buf.append("\n");
363:                        }
364:                    }
365:                } catch (Exception e) {
366:                    throw new HttpClientException(
367:                            "Error processing input stream", e);
368:                }
369:                return buf.toString();
370:            }
371:
372:            private InputStream sendHttpRequestStream(String method)
373:                    throws HttpClientException {
374:                // setup some SSL variables
375:                SSLUtil.loadJsseProperties();
376:
377:                String arguments = null;
378:                InputStream in = null;
379:
380:                if (url == null) {
381:                    throw new HttpClientException("Cannot process a null URL.");
382:                }
383:
384:                if (rawStream != null) {
385:                    arguments = rawStream;
386:                } else if (parameters != null && parameters.size() > 0) {
387:                    arguments = UtilHttp.urlEncodeArgs(parameters);
388:                }
389:
390:                // Append the arguments to the query string if GET.
391:                if (method.equalsIgnoreCase("get") && arguments != null) {
392:                    url = url + "?" + arguments;
393:                }
394:
395:                // Create the URL and open the connection.
396:                try {
397:                    requestUrl = new URL(url);
398:                    con = URLConnector.openConnection(requestUrl, timeout,
399:                            clientCertAlias);
400:                    if (Debug.verboseOn() || debug)
401:                        Debug.log("Connection opened to : "
402:                                + requestUrl.toExternalForm(), module);
403:
404:                    if ((con instanceof  HttpURLConnection)) {
405:                        ((HttpURLConnection) con)
406:                                .setInstanceFollowRedirects(followRedirects);
407:                        if (Debug.verboseOn() || debug)
408:                            Debug.log(
409:                                    "Connection is of type HttpURLConnection",
410:                                    module);
411:                    }
412:
413:                    con.setDoOutput(true);
414:                    con.setUseCaches(false);
415:                    if (Debug.verboseOn() || debug)
416:                        Debug.log("Do Input = true / Use Caches = false",
417:                                module);
418:
419:                    if (method.equalsIgnoreCase("post")) {
420:                        con.setRequestProperty("Content-type",
421:                                "application/x-www-form-urlencoded");
422:                        con.setDoInput(true);
423:                        if (Debug.verboseOn() || debug)
424:                            Debug
425:                                    .log(
426:                                            "Set content type to : application/x-www-form-urlencoded",
427:                                            module);
428:                    }
429:
430:                    if (headers != null && headers.size() > 0) {
431:                        Set headerSet = headers.keySet();
432:                        Iterator i = headerSet.iterator();
433:
434:                        while (i.hasNext()) {
435:                            String headerName = (String) i.next();
436:                            String headerValue = (String) headers
437:                                    .get(headerName);
438:                            con.setRequestProperty(headerName, headerValue);
439:                            if (Debug.verboseOn() || debug)
440:                                Debug.log("Header : " + headerName + " -> "
441:                                        + headerValue, module);
442:                        }
443:                    } else {
444:                        if (Debug.verboseOn() || debug)
445:                            Debug.log("No headers to set", module);
446:                    }
447:
448:                    if (method.equalsIgnoreCase("post")) {
449:                        DataOutputStream out = new DataOutputStream(con
450:                                .getOutputStream());
451:                        if (Debug.verboseOn() || debug)
452:                            Debug.log("Opened output stream", module);
453:
454:                        out.writeBytes(arguments);
455:                        if (Debug.verboseOn() || debug)
456:                            Debug.log("Wrote arguements (parameters) : "
457:                                    + arguments, module);
458:
459:                        out.flush();
460:                        out.close();
461:                        if (Debug.verboseOn() || debug)
462:                            Debug.log("Flushed and closed buffer", module);
463:                    }
464:
465:                    if (Debug.verboseOn() || debug) {
466:                        Map headerFields = con.getHeaderFields();
467:                        Debug.log("Header Fields : " + headerFields, module);
468:                    }
469:
470:                    in = con.getInputStream();
471:                } catch (IOException ioe) {
472:                    throw new HttpClientException(
473:                            "IO Error processing request", ioe);
474:                } catch (Exception e) {
475:                    throw new HttpClientException("Error processing request", e);
476:                }
477:
478:                return in;
479:            }
480:        }
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