Java Code Examples for javax.servlet.ServletContext#getRequestDispatcher()
The following examples show how to use
javax.servlet.ServletContext#getRequestDispatcher() .
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Example 1
| Source File: RequestForwardUtils.java From tds with BSD 3-Clause "New" or "Revised" License | 6 votes |
|
public static void forwardRequestRelativeToGivenContext(String fwdPath, ServletContext targetContext,
HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
if (fwdPath == null || targetContext == null || request == null || response == null) {
String msg = "Path, context, request, and response may not be null";
log.error(
"forwardRequestRelativeToGivenContext() ERROR: " + msg + (fwdPath == null ? ": " : "[" + fwdPath + "]: "));
throw new IllegalArgumentException(msg + ".");
}
Escaper urlPathEscaper = UrlEscapers.urlPathSegmentEscaper();
String encodedPath = urlPathEscaper.escape(fwdPath); // LOOK path vs query
RequestDispatcher dispatcher = targetContext.getRequestDispatcher(encodedPath);
if (dispatcherWasFound(encodedPath, dispatcher, response))
dispatcher.forward(request, response);
}
Example 2
| Source File: NettyAsyncContext.java From Jinx with Apache License 2.0 | 6 votes |
|
@Override
public void dispatch(ServletContext context, String path) {
final HttpServletRequest httpRequest = (HttpServletRequest) servletRequest;
httpRequest.setAttribute(ASYNC_CONTEXT_PATH, httpRequest.getContextPath());
httpRequest.setAttribute(ASYNC_PATH_INFO, httpRequest.getPathInfo());
httpRequest.setAttribute(ASYNC_QUERY_STRING, httpRequest.getQueryString());
httpRequest.setAttribute(ASYNC_REQUEST_URI, httpRequest.getRequestURI());
httpRequest.setAttribute(ASYNC_SERVLET_PATH, httpRequest.getServletPath());
final NettyRequestDispatcher dispatcher = (NettyRequestDispatcher) context.getRequestDispatcher(path);
ctx.executor().submit(() -> {
try {
dispatcher.dispatch(httpRequest, servletResponse);
// TODO is this right?
for (AsyncListener listener : ImmutableList.copyOf(listeners)) {
listener.onComplete(new AsyncEvent(NettyAsyncContext.this));
}
} catch (ServletException | IOException e) {
// TODO notify listeners
e.printStackTrace();
}
});
}
Example 3
| Source File: TestRequestDispatcher.java From joynr with Apache License 2.0 | 6 votes |
|
private void forwardToUrl(final String targetContextPath,
Request baseRequest,
HttpServletResponse response) throws ServletException, IOException {
logger.info("Forward request {} to context {}", baseRequest.toString(), targetContextPath);
synchronized (contextForwardCounts) {
int currentContextForwardCount = 0;
if (contextForwardCounts.containsKey(targetContextPath)) {
currentContextForwardCount = contextForwardCounts.get(targetContextPath);
}
contextForwardCounts.put(targetContextPath, currentContextForwardCount + 1);
}
ServletContext currentContext = baseRequest.getServletContext();
String currentContextPath = currentContext.getContextPath();
String forwardContextPath = currentContextPath.replace(ClusteredBounceProxyWithDispatcher.CONTEXT_DISPATCHER,
targetContextPath);
ServletContext forwardContext = currentContext.getContext(forwardContextPath);
String forwardPath = baseRequest.getPathInfo();
RequestDispatcher requestDispatcher = forwardContext.getRequestDispatcher(forwardPath);
requestDispatcher.forward(baseRequest, response);
}
Example 4
| Source File: GenericWebServiceServlet.java From BIMserver with GNU Affero General Public License v3.0 | 6 votes |
|
protected void redirect(HttpServletRequest request, HttpServletResponse response, String pathInfo) throws ServletException {
String theServletPath = dispatcherServletPath == null ? "/" : dispatcherServletPath;
ServletContext sc = super.getServletContext();
RequestDispatcher rd = dispatcherServletName != null ? sc.getNamedDispatcher(dispatcherServletName) : sc.getRequestDispatcher(theServletPath + pathInfo);
if (rd == null) {
throw new ServletException("No RequestDispatcher can be created for path " + pathInfo);
}
try {
HttpServletRequestFilter servletRequest = new HttpServletRequestFilter(request, pathInfo, theServletPath);
rd.forward(servletRequest, response);
} catch (Throwable ex) {
throw new ServletException("RequestDispatcher for path " + pathInfo + " has failed");
}
}
Example 5
| Source File: AbstractHTTPServlet.java From cxf with Apache License 2.0 | 5 votes |
|
protected void redirect(HttpServletRequest request, HttpServletResponse response, String pathInfo)
throws ServletException {
boolean customServletPath = dispatcherServletPath != null;
String theServletPath = customServletPath ? dispatcherServletPath : "/";
ServletContext sc = super.getServletContext();
RequestDispatcher rd = dispatcherServletName != null
? sc.getNamedDispatcher(dispatcherServletName)
: sc.getRequestDispatcher((theServletPath + pathInfo).replace("//", "/"));
if (rd == null) {
String errorMessage = "No RequestDispatcher can be created for path " + pathInfo;
if (dispatcherServletName != null) {
errorMessage += ", dispatcher name: " + dispatcherServletName;
}
throw new ServletException(errorMessage);
}
try {
for (Map.Entry<String, String> entry : redirectAttributes.entrySet()) {
request.setAttribute(entry.getKey(), entry.getValue());
}
HttpServletRequest servletRequest =
new HttpServletRequestRedirectFilter(request, pathInfo, theServletPath, customServletPath);
if (PropertyUtils.isTrue(getServletConfig().getInitParameter(REDIRECT_WITH_INCLUDE_PARAMETER))) {
rd.include(servletRequest, response);
} else {
rd.forward(servletRequest, response);
}
} catch (Throwable ex) {
throw new ServletException("RequestDispatcher for path " + pathInfo + " has failed", ex);
}
}
Example 6
| Source File: AsyncContextImpl.java From Tomcat8-Source-Read with MIT License | 5 votes |
|
@Override
public void dispatch(ServletContext servletContext, String path) {
synchronized (asyncContextLock) {
if (log.isDebugEnabled()) {
logDebug("dispatch ");
}
check();
if (dispatch != null) {
throw new IllegalStateException(
sm.getString("asyncContextImpl.dispatchingStarted"));
}
if (request.getAttribute(ASYNC_REQUEST_URI)==null) {
request.setAttribute(ASYNC_REQUEST_URI, request.getRequestURI());
request.setAttribute(ASYNC_CONTEXT_PATH, request.getContextPath());
request.setAttribute(ASYNC_SERVLET_PATH, request.getServletPath());
request.setAttribute(ASYNC_PATH_INFO, request.getPathInfo());
request.setAttribute(ASYNC_QUERY_STRING, request.getQueryString());
}
final RequestDispatcher requestDispatcher = servletContext.getRequestDispatcher(path);
if (!(requestDispatcher instanceof AsyncDispatcher)) {
throw new UnsupportedOperationException(
sm.getString("asyncContextImpl.noAsyncDispatcher"));
}
final AsyncDispatcher applicationDispatcher =
(AsyncDispatcher) requestDispatcher;
final ServletRequest servletRequest = getRequest();
final ServletResponse servletResponse = getResponse();
// https://bz.apache.org/bugzilla/show_bug.cgi?id=63246
// Take a local copy as the dispatch may complete the
// request/response and that in turn may trigger recycling of this
// object before the in-progress count can be decremented
final Context context = this.context;
this.dispatch = new AsyncRunnable(
request, applicationDispatcher, servletRequest, servletResponse);
this.request.getCoyoteRequest().action(ActionCode.ASYNC_DISPATCH, null);
clearServletRequestResponse();
context.decrementInProgressAsyncCount();
}
}
Example 7
| Source File: AtlasHttpServlet.java From atlas with Apache License 2.0 | 5 votes |
|
protected void includeResponse(HttpServletRequest request, HttpServletResponse response, String template) {
try {
response.setContentType(TEXT_HTML);
response.setHeader(XFRAME_OPTION, DENY);
ServletContext context = getServletContext();
RequestDispatcher rd = context.getRequestDispatcher(template);
rd.include(request, response);
} catch (Exception e) {
LOG.error("Error in AtlasHttpServlet", template, e);
}
}
Example 8
| Source File: FineGrainedDispatch.java From nexus-public with Eclipse Public License 1.0 | 5 votes |
|
@Override
protected void service(final HttpServletRequest req, final HttpServletResponse resp)
throws ServletException, IOException
{
try {
final String matchingRoute = findMatchingRoute(req);
ServletContext context = getServletContext();
RequestDispatcher rd = context.getRequestDispatcher(matchingRoute);
rd.forward(req, resp);
}
catch (Exception e) {
Throwables.propagateIfPossible(e, ServletException.class, IOException.class);
}
}
Example 9
| Source File: RequestDispatcherProvider.java From cxf with Apache License 2.0 | 5 votes |
|
protected RequestDispatcher getRequestDispatcher(ServletContext sc, Class<?> clazz, String path) {
RequestDispatcher rd = dispatcherName != null ? sc.getNamedDispatcher(dispatcherName)
: sc.getRequestDispatcher(path);
if (rd == null) {
String message =
new org.apache.cxf.common.i18n.Message("RESOURCE_PATH_NOT_FOUND",
BUNDLE, path).toString();
LOG.severe(message);
throw ExceptionUtils.toInternalServerErrorException(null, null);
}
return rd;
}
Example 10
| Source File: MCRServletTarget.java From mycore with GNU General Public License v3.0 | 5 votes |
|
@Override
public void handleSubmission(ServletContext context, MCRServletJob job, MCREditorSession session,
String servletNameOrPath)
throws Exception {
session.getSubmission().setSubmittedValues(job.getRequest().getParameterMap());
Document result = session.getEditedXML();
if (session.getValidator().isValid()) {
result = MCRChangeTracker.removeChangeTracking(result);
result = session.getXMLCleaner().clean(result);
result = session.getPostProcessor().process(result);
RequestDispatcher dispatcher = context.getNamedDispatcher(servletNameOrPath);
if (dispatcher == null) {
dispatcher = context.getRequestDispatcher(servletNameOrPath);
}
job.getRequest().setAttribute("MCRXEditorSubmission", result);
session.setBreakpoint("After handling target servlet " + servletNameOrPath);
dispatcher.forward(job.getRequest(), job.getResponse());
} else {
session.setBreakpoint("After validation failed, target servlet " + servletNameOrPath);
job.getResponse().sendRedirect(job.getResponse().encodeRedirectURL(session.getRedirectURL(null)));
}
}
Example 11
| Source File: Router.java From Knowage-Server with GNU Affero General Public License v3.0 | 4 votes |
|
public void route(
ServletContext servletContext,
HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
TracerSingleton.log(
Constants.NOME_MODULO,
TracerSingleton.DEBUG,
"Router::route: request.getContextPath() ["
+ request.getContextPath()
+ "]");
TracerSingleton.log(
Constants.NOME_MODULO,
TracerSingleton.DEBUG,
"Router::Router: _publisher [" + _publisher + "]");
TracerSingleton.log(
Constants.NOME_MODULO,
TracerSingleton.DEBUG,
"Router::Router: _isForward [" + _isForward + "]");
String publishingParameters = "";
Enumeration parameterNames = _parameters.keys();
while (parameterNames.hasMoreElements()) {
String parameterName = (String) parameterNames.nextElement();
String parameterValue =
String.valueOf(_parameters.get(parameterName));
if (_publisher.indexOf(parameterName) == -1)
publishingParameters += JavaScript.escape(parameterName)
+ "="
+ JavaScript.escape(parameterValue)
+ "&";
} // while (parameterNames.hasMoreElements())
TracerSingleton.log(
Constants.NOME_MODULO,
TracerSingleton.DEBUG,
"Router::route: publishingParameters ["
+ publishingParameters
+ "]");
String publishingURL = _publisher;
ConfigSingleton configure = ConfigSingleton.getInstance();
String appendContextRoot =
(String) configure.getAttribute("PUBLISHING.APPEND_CONTEXT_ROOT");
if ((appendContextRoot == null)
|| (appendContextRoot.equalsIgnoreCase("TRUE")))
if (_publisher.startsWith("/")) {
TracerSingleton.log(
Constants.NOME_MODULO,
TracerSingleton.DEBUG,
"Router::route: publisher assoluto");
if (_isForward)
publishingURL = _publisher;
else
publishingURL = request.getContextPath() + _publisher;
} // if (_publisher.startsWith("/"))
else {
TracerSingleton.log(
Constants.NOME_MODULO,
TracerSingleton.DEBUG,
"Router::route: publisher relativo");
publishingURL = _publisher;
} // if (_publisher.startsWith("/")) else
if (publishingParameters!=null && publishingParameters.length()>0) {
if (_publisher.indexOf('?') == -1)
publishingURL += "?" + publishingParameters;
else
publishingURL += "&" + publishingParameters;
}
TracerSingleton.log(
Constants.NOME_MODULO,
TracerSingleton.DEBUG,
"Router::route: publishingURL [" + publishingURL + "]");
if (_isForward) {
RequestDispatcher requestDispatcher =
servletContext.getRequestDispatcher(publishingURL);
requestDispatcher.forward(request, response);
} // if (_isForward)
else {
response.sendRedirect(response.encodeRedirectURL(publishingURL));
} // if (_isForward) else
}
Example 12
| Source File: AsyncContextImpl.java From tomcatsrc with Apache License 2.0 | 4 votes |
|
@Override
public void dispatch(ServletContext context, String path) {
synchronized (asyncContextLock) {
if (log.isDebugEnabled()) {
logDebug("dispatch ");
}
check();
if (dispatch != null) {
throw new IllegalStateException(
sm.getString("asyncContextImpl.dispatchingStarted"));
}
if (request.getAttribute(ASYNC_REQUEST_URI)==null) {
request.setAttribute(ASYNC_REQUEST_URI, request.getRequestURI());
request.setAttribute(ASYNC_CONTEXT_PATH, request.getContextPath());
request.setAttribute(ASYNC_SERVLET_PATH, request.getServletPath());
request.setAttribute(ASYNC_PATH_INFO, request.getPathInfo());
request.setAttribute(ASYNC_QUERY_STRING, request.getQueryString());
}
final RequestDispatcher requestDispatcher = context.getRequestDispatcher(path);
if (!(requestDispatcher instanceof AsyncDispatcher)) {
throw new UnsupportedOperationException(
sm.getString("asyncContextImpl.noAsyncDispatcher"));
}
final AsyncDispatcher applicationDispatcher =
(AsyncDispatcher) requestDispatcher;
final ServletRequest servletRequest = getRequest();
final ServletResponse servletResponse = getResponse();
Runnable run = new Runnable() {
@Override
public void run() {
request.getCoyoteRequest().action(ActionCode.ASYNC_DISPATCHED, null);
try {
applicationDispatcher.dispatch(servletRequest, servletResponse);
}catch (Exception x) {
//log.error("Async.dispatch",x);
throw new RuntimeException(x);
}
}
};
this.dispatch = run;
this.request.getCoyoteRequest().action(ActionCode.ASYNC_DISPATCH, null);
clearServletRequestResponse();
}
}
Example 13
| Source File: JspToHtml.java From DWSurvey with GNU Affero General Public License v3.0 | 4 votes |
|
public void jspWriteToHtml(String url, String filePath,String fileName) throws Exception {
HttpServletRequest request = Struts2Utils.getRequest();
HttpServletResponse response = Struts2Utils.getResponse();
ServletContext sc = ServletActionContext.getServletContext();
url = "/my-survey-design!previewDev.action?surveyId=402880ea4675ac62014675ac7b3a0000";
// 这是生成的html文件名,如index.htm
filePath = filePath.replace("/", File.separator);
filePath = filePath.replace("\\", File.separator);
String fileRealPath = sc.getRealPath("/") + filePath;
RequestDispatcher rd = sc.getRequestDispatcher(url);
final ByteArrayOutputStream os = new ByteArrayOutputStream();
final ServletOutputStream stream = new ServletOutputStream() {
public void write(byte[] data, int offset, int length) {
os.write(data, offset, length);
}
public void write(int b) throws IOException {
os.write(b);
}
};
final PrintWriter pw = new PrintWriter(new OutputStreamWriter(os,
"UTF-8"));
HttpServletResponse rep = new HttpServletResponseWrapper(response) {
public ServletOutputStream getOutputStream() {
return stream;
}
public PrintWriter getWriter() {
return pw;
}
};
rd.forward(request, response);
pw.flush();
File file2 = new File(fileRealPath);
if (!file2.exists() || !file2.isDirectory()) {
file2.mkdirs();
}
File file = new File(fileRealPath + fileName);
if (!file.exists()) {
file.createNewFile();
}
FileOutputStream fos = new FileOutputStream(file);
os.writeTo(fos);
fos.close();
}
Example 14
| Source File: MySurveyDesignAction.java From DWSurvey with GNU Affero General Public License v3.0 | 4 votes |
|
private void buildSurveyHtml() throws Exception{
HttpServletRequest request=Struts2Utils.getRequest();
HttpServletResponse response=Struts2Utils.getResponse();
String url = "";
String name = "";
ServletContext sc = ServletActionContext.getServletContext();
String file_name = request.getParameter("file_name");
url = "/design/my-collect.action?surveyId=402880ea4675ac62014675ac7b3a0000";
// 这是生成的html文件名,如index.htm.
name = "/survey.htm";
name = sc.getRealPath(name);
RequestDispatcher rd = sc.getRequestDispatcher(url);
final ByteArrayOutputStream os = new ByteArrayOutputStream();
final ServletOutputStream stream = new ServletOutputStream() {
public void write(byte[] data, int offset, int length) {
os.write(data, offset, length);
}
public void write(int b) throws IOException {
os.write(b);
}
};
final PrintWriter pw = new PrintWriter(new OutputStreamWriter(os,"utf-8"));
HttpServletResponse rep = new HttpServletResponseWrapper(response) {
public ServletOutputStream getOutputStream() {
return stream;
}
public PrintWriter getWriter() {
return pw;
}
};
// rd.include(request, rep);
rd.forward(request,rep);
pw.flush();
// 把jsp输出的内容写到xxx.htm
File file = new File(name);
if (!file.exists()) {
file.createNewFile();
}
FileOutputStream fos = new FileOutputStream(file);
os.writeTo(fos);
fos.close();
}
Example 15
| Source File: ProviderServlet.java From sakai with Educational Community License v2.0 | 4 votes |
|
private void handleContentItem(HttpServletRequest request, HttpServletResponse response, Map payload)
throws ServletException, IOException
{
String allowedToolsConfig = ServerConfigurationService.getString("basiclti.provider.allowedtools", "");
String[] allowedTools = allowedToolsConfig.split(":");
List<String> allowedToolsList = Arrays.asList(allowedTools);
String tool_id = (String) request.getParameter("install");
if ( tool_id == null ) {
ArrayList<Tool> tools = new ArrayList<Tool>();
for (String toolId : allowedToolsList) {
Tool theTool = ToolManager.getTool(toolId);
if ( theTool == null ) continue;
tools.add(theTool);
}
request.setAttribute("tools",tools);
} else {
if ( !allowedToolsList.contains(tool_id)) {
doError(request, response, "launch.tool.notallowed", tool_id, null);
return;
}
final Tool toolCheck = ToolManager.getTool(tool_id);
if ( toolCheck == null) {
doError(request, response, "launch.tool.notfound", tool_id, null);
return;
}
String content_item_return_url = (String) payload.get("content_item_return_url");
if ( content_item_return_url == null) {
doError(request, response, "content_item.return_url.notfound", tool_id, null);
return;
}
ContentItemResponse resp = SakaiContentItemUtil.getContentItemResponse(tool_id);
if ( resp == null) {
doError(request, response, "launch.tool.notfound", tool_id, null);
return;
}
String content_items = resp.prettyPrintLog();
// Set up the return
Map<String, String> ltiMap = new HashMap<String, String> ();
Map<String, String> extra = new HashMap<String, String> ();
ltiMap.put(BasicLTIConstants.LTI_MESSAGE_TYPE, BasicLTIConstants.LTI_MESSAGE_TYPE_CONTENTITEMSELECTION);
ltiMap.put(BasicLTIConstants.LTI_VERSION, BasicLTIConstants.LTI_VERSION_1);
ltiMap.put("content_items", content_items);
String data = (String) payload.get("data");
if ( data != null ) ltiMap.put("data", data);
log.debug("ltiMap={}", ltiMap);
boolean dodebug = log.isDebugEnabled();
boolean autosubmit = false;
String launchtext = rb.getString("content_item.install.button");
String back_to_store = rb.getString("content_item.back.to.store");
extra.put("button_html","<input type=\"submit\" value=\""+back_to_store+"\"onclick=\"location.href='content.item'; return false;\">");
String launch_html = BasicLTIUtil.postLaunchHTML(ltiMap, content_item_return_url, launchtext, autosubmit, dodebug, extra);
request.setAttribute("back_to_store", rb.getString("content_item.back.to.store"));
request.setAttribute("install",tool_id);
request.setAttribute("launch_html",launch_html);
request.setAttribute("tool",toolCheck);
}
// Forward to the JSP
ServletContext sc = this.getServletContext();
RequestDispatcher rd = sc.getRequestDispatcher("/contentitem.jsp");
try {
rd.forward(request, response);
}
catch (Exception e) {
log.error(e.getMessage(), e);
}
}
Example 16
| Source File: SSIServletExternalResolver.java From Tomcat8-Source-Read with MIT License | 4 votes |
|
@Override
public String getFileText(String originalPath, boolean virtual)
throws IOException {
try {
ServletContextAndPath csAndP = getServletContextAndPath(
originalPath, virtual);
ServletContext context = csAndP.getServletContext();
String path = csAndP.getPath();
RequestDispatcher rd = context.getRequestDispatcher(path);
if (rd == null) {
throw new IOException(
"Couldn't get request dispatcher for path: " + path);
}
ByteArrayServletOutputStream basos = new ByteArrayServletOutputStream();
ResponseIncludeWrapper responseIncludeWrapper = new ResponseIncludeWrapper(res, basos);
rd.include(req, responseIncludeWrapper);
//We can't assume the included servlet flushed its output
responseIncludeWrapper.flushOutputStreamOrWriter();
byte[] bytes = basos.toByteArray();
//Assume platform default encoding unless otherwise specified
String retVal;
if (inputEncoding == null) {
retVal = new String( bytes );
} else {
retVal = new String (bytes,
B2CConverter.getCharset(inputEncoding));
}
//make an assumption that an empty response is a failure. This is
// a problem
// if a truly empty file
//were included, but not sure how else to tell.
if (retVal.equals("") && !req.getMethod().equalsIgnoreCase("HEAD")) {
throw new IOException("Couldn't find file: " + path);
}
return retVal;
} catch (ServletException e) {
throw new IOException("Couldn't include file: " + originalPath
+ " because of ServletException: " + e.getMessage());
}
}
Example 17
| Source File: JspTemplateImpl.java From docx4j-template with Apache License 2.0 | 4 votes |
|
private void doInterpret(String requestURL,Map<String, Object> variables, OutputStream output) throws IOException, ServletException {
/**
* 创建ServletContext对象，用于获取RequestDispatcher对象
*/
ServletContext sc = request.getSession().getServletContext();
/**
* 根据传过来的相对文件路径，生成一个reqeustDispatcher的包装类
*/
RequestDispatcher rd = sc.getRequestDispatcher(requestURL);
/**
* 创建一个ByteArrayOutputStream的字节数组输出流,用来存放输出的信息
*/
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
/**
* ServletOutputStream是抽象类，必须实现write的方法
*/
final ServletOutputStream outputStream = new ServletOutputStream(){
public void write(int b) throws IOException {
/**
* 将指定的字节写入此字节输出流
*/
baos.write(b);
}
@SuppressWarnings("unused")
public boolean isReady() {
return false;
}
};
/**
* 通过现有的 OutputStream 创建新的 PrintWriter
* OutputStreamWriter 是字符流通向字节流的桥梁：可使用指定的 charset 将要写入流中的字符编码成字节
*/
final PrintWriter pw = new PrintWriter(new OutputStreamWriter(baos, config.getOutputEncoding() ),true);
/**
* 生成HttpServletResponse的适配器，用来包装response
*/
HttpServletResponse resp = new HttpServletResponseWrapper(response){
/**
* 调用getOutputStream的方法(此方法是ServletResponse中已有的)返回ServletOutputStream的对象
* 用来在response中返回一个二进制输出对象
* 此方法目的是把源文件写入byteArrayOutputStream
*/
public ServletOutputStream getOutputStream(){
return outputStream;
}
/**
* 再调用getWriter的方法(此方法是ServletResponse中已有)返回PrintWriter的对象
* 此方法用来发送字符文本到客户端
*/
public PrintWriter getWriter(){
return pw;
}
};
/**
* 在不跳转下访问目标jsp。 就是利用RequestDispatcher.include(ServletRequest request,
* ServletResponse response)。 该方法把RequestDispatcher指向的目标页面写到response中。
*/
rd.include(request, resp);
pw.flush();
/**
* 使用ByteArrayOutputStream的writeTo方法来向文本输出流写入数据，这也是为什么要使用ByteArray的一个原因
*/
baos.writeTo(output);
}
Example 18
| Source File: AsyncContextImpl.java From Tomcat7.0.67 with Apache License 2.0 | 4 votes |
|
@Override
public void dispatch(ServletContext context, String path) {
synchronized (asyncContextLock) {
if (log.isDebugEnabled()) {
logDebug("dispatch ");
}
check();
if (dispatch != null) {
throw new IllegalStateException(
sm.getString("asyncContextImpl.dispatchingStarted"));
}
if (request.getAttribute(ASYNC_REQUEST_URI)==null) {
request.setAttribute(ASYNC_REQUEST_URI, request.getRequestURI());
request.setAttribute(ASYNC_CONTEXT_PATH, request.getContextPath());
request.setAttribute(ASYNC_SERVLET_PATH, request.getServletPath());
request.setAttribute(ASYNC_PATH_INFO, request.getPathInfo());
request.setAttribute(ASYNC_QUERY_STRING, request.getQueryString());
}
final RequestDispatcher requestDispatcher = context.getRequestDispatcher(path);
if (!(requestDispatcher instanceof AsyncDispatcher)) {
throw new UnsupportedOperationException(
sm.getString("asyncContextImpl.noAsyncDispatcher"));
}
final AsyncDispatcher applicationDispatcher =
(AsyncDispatcher) requestDispatcher;
final ServletRequest servletRequest = getRequest();
final ServletResponse servletResponse = getResponse();
Runnable run = new Runnable() {
@Override
public void run() {
request.getCoyoteRequest().action(ActionCode.ASYNC_DISPATCHED, null);
try {
applicationDispatcher.dispatch(servletRequest, servletResponse);
}catch (Exception x) {
//log.error("Async.dispatch",x);
throw new RuntimeException(x);
}
}
};
this.dispatch = run;
this.request.getCoyoteRequest().action(ActionCode.ASYNC_DISPATCH, null);
clearServletRequestResponse();
}
}
Example 19
| Source File: StandardHostValve.java From Tomcat7.0.67 with Apache License 2.0 | 4 votes |
|
/**
* Handle an HTTP status code or Java exception by forwarding control
* to the location included in the specified errorPage object. It is
* assumed that the caller has already recorded any request attributes
* that are to be forwarded to this page. Return <code>true</code> if
* we successfully utilized the specified error page location, or
* <code>false</code> if the default error report should be rendered.
*
* @param request The request being processed
* @param response The response being generated
* @param errorPage The errorPage directive we are obeying
*/
private boolean custom(Request request, Response response,
ErrorPage errorPage) {
if (container.getLogger().isDebugEnabled())
container.getLogger().debug("Processing " + errorPage);
try {
// Forward control to the specified location
ServletContext servletContext =
request.getContext().getServletContext();
RequestDispatcher rd =
servletContext.getRequestDispatcher(errorPage.getLocation());
if (rd == null) {
container.getLogger().error(
sm.getString("standardHostValue.customStatusFailed", errorPage.getLocation()));
return false;
}
if (response.isCommitted()) {
// Response is committed - including the error page is the
// best we can do
rd.include(request.getRequest(), response.getResponse());
} else {
// Reset the response (keeping the real error code and message)
response.resetBuffer(true);
response.setContentLength(-1);
rd.forward(request.getRequest(), response.getResponse());
// If we forward, the response is suspended again
response.setSuspended(false);
}
// Indicate that we have successfully processed this custom page
return (true);
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
// Report our failure to process this custom page
container.getLogger().error("Exception Processing " + errorPage, t);
return (false);
}
}
Example 20
| Source File: StandardHostValve.java From Tomcat8-Source-Read with MIT License | 4 votes |
|
/**
* Handle an HTTP status code or Java exception by forwarding control
* to the location included in the specified errorPage object. It is
* assumed that the caller has already recorded any request attributes
* that are to be forwarded to this page. Return <code>true</code> if
* we successfully utilized the specified error page location, or
* <code>false</code> if the default error report should be rendered.
*
* @param request The request being processed
* @param response The response being generated
* @param errorPage The errorPage directive we are obeying
*/
private boolean custom(Request request, Response response,
ErrorPage errorPage) {
if (container.getLogger().isDebugEnabled()) {
container.getLogger().debug("Processing " + errorPage);
}
try {
// Forward control to the specified location
ServletContext servletContext =
request.getContext().getServletContext();
RequestDispatcher rd =
servletContext.getRequestDispatcher(errorPage.getLocation());
if (rd == null) {
container.getLogger().error(
sm.getString("standardHostValue.customStatusFailed", errorPage.getLocation()));
return false;
}
if (response.isCommitted()) {
// Response is committed - including the error page is the
// best we can do
rd.include(request.getRequest(), response.getResponse());
} else {
// Reset the response (keeping the real error code and message)
response.resetBuffer(true);
response.setContentLength(-1);
rd.forward(request.getRequest(), response.getResponse());
// If we forward, the response is suspended again
response.setSuspended(false);
}
// Indicate that we have successfully processed this custom page
return true;
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
// Report our failure to process this custom page
container.getLogger().error("Exception Processing " + errorPage, t);
return false;
}
}
