HttpServletResponse.java
上传用户:tanyanyong
上传日期:2013-06-23
资源大小:1355k
文件大小:21k
源码类别:
电子政务应用
开发平台:
MultiPlatform
- /*
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 1999 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution, if
- * any, must include the following acknowlegement:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowlegement may appear in the software itself,
- * if and wherever such third-party acknowlegements normally appear.
- *
- * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
- * Foundation" must not be used to endorse or promote products derived
- * from this software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache"
- * nor may "Apache" appear in their names without prior written
- * permission of the Apache Group.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- *
- * ====================================================================
- *
- * This source code implements specifications defined by the Java
- * Community Process. In order to remain compliant with the specification
- * DO NOT add / change / or delete method signatures!
- */
- package javax.servlet.http;
- import javax.servlet.ServletResponse;
- import javax.servlet.ServletException;
- import java.io.IOException;
- /**
- *
- * Extends the {@link ServletResponse} interface to provide HTTP-specific
- * functionality in sending a response. For example, it has methods
- * to access HTTP headers and cookies.
- *
- * <p>The servlet container creates an <code>HttpServletRequest</code> object
- * and passes it as an argument to the servlet's service methods
- * (<code>doGet</code>, <code>doPost</code>, etc).
- *
- *
- * @author Various
- * @version $Version$
- *
- * @see javax.servlet.ServletResponse
- *
- */
- public interface HttpServletResponse extends ServletResponse {
- /**
- * Adds the specified cookie to the response. This method can be called
- * multiple times to set more than one cookie.
- *
- * @param cookie the Cookie to return to the client
- *
- */
- public void addCookie(Cookie cookie);
- /**
- * Returns a boolean indicating whether the named response header
- * has already been set.
- *
- * @param name the header name
- * @return <code>true</code> if the named response header
- * has already been set;
- * <code>false</code> otherwise
- */
- public boolean containsHeader(String name);
- /**
- * Encodes the specified URL by including the session ID in it,
- * or, if encoding is not needed, returns the URL unchanged.
- * The implementation of this method includes the logic to
- * determine whether the session ID needs to be encoded in the URL.
- * For example, if the browser supports cookies, or session
- * tracking is turned off, URL encoding is unnecessary.
- *
- * <p>For robust session tracking, all URLs emitted by a servlet
- * should be run through this
- * method. Otherwise, URL rewriting cannot be used with browsers
- * which do not support cookies.
- *
- * @param url the url to be encoded.
- * @return the encoded URL if encoding is needed;
- * the unchanged URL otherwise.
- */
- public String encodeURL(String url);
- /**
- * Encodes the specified URL for use in the
- * <code>sendRedirect</code> method or, if encoding is not needed,
- * returns the URL unchanged. The implementation of this method
- * includes the logic to determine whether the session ID
- * needs to be encoded in the URL. Because the rules for making
- * this determination can differ from those used to decide whether to
- * encode a normal link, this method is seperate from the
- * <code>encodeURL</code> method.
- *
- * <p>All URLs sent to the <code>HttpServletResponse.sendRedirect</code>
- * method should be run through this method. Otherwise, URL
- * rewriting cannot be used with browsers which do not support
- * cookies.
- *
- * @param url the url to be encoded.
- * @return the encoded URL if encoding is needed;
- * the unchanged URL otherwise.
- *
- * @see #sendRedirect
- * @see #encodeUrl
- */
- public String encodeRedirectURL(String url);
- /**
- * @deprecated As of version 2.1, use encodeURL(String url) instead
- *
- * @param url the url to be encoded.
- * @return the encoded URL if encoding is needed;
- * the unchanged URL otherwise.
- */
- public String encodeUrl(String url);
- /**
- * @deprecated As of version 2.1, use
- * encodeRedirectURL(String url) instead
- *
- * @param url the url to be encoded.
- * @return the encoded URL if encoding is needed;
- * the unchanged URL otherwise.
- */
- public String encodeRedirectUrl(String url);
- /**
- * Sends an error response to the client using the specified status
- * code and descriptive message. The server generally creates the
- * response to look like a normal server error page.
- *
- * <p>If the response has already been committed, this method throws
- * an IllegalStateException.
- * After using this method, the response should be considered
- * to be committed and should not be written to.
- *
- * @param sc the error status code
- * @param msg the descriptive message
- * @exception IOException If an input or output exception occurs
- * @exception IllegalStateException If the response was committed
- * before this method call
- */
- public void sendError(int sc, String msg) throws IOException;
- /**
- * Sends an error response to the client using the specified
- * status. The server generally creates the
- * response to look like a normal server error page.
- *
- * <p>If the response has already been committed, this method throws
- * an IllegalStateException.
- * After using this method, the response should be considered
- * to be committed and should not be written to.
- *
- * @param sc the error status code
- * @exception IOException If an input or output exception occurs
- * @exception IllegalStateException If the response was committed
- */
- public void sendError(int sc) throws IOException;
- /**
- * Sends a temporary redirect response to the client using the
- * specified redirect location URL. This method can accept relative URLs;
- * the servlet container will convert the relative URL to an absolute URL
- * before sending the response to the client.
- *
- * <p>If the response has already been committed, this method throws
- * an IllegalStateException.
- * After using this method, the response should be considered
- * to be committed and should not be written to.
- *
- * @param location the redirect location URL
- * @exception IOException If an input or output exception occurs
- * @exception IllegalStateException If the response was committed
- */
- public void sendRedirect(String location) throws IOException;
- /**
- *
- * Sets a response header with the given name and
- * date-value. The date is specified in terms of
- * milliseconds since the epoch. If the header had already
- * been set, the new value overwrites the previous one. The
- * <code>containsHeader</code> method can be used to test for the
- * presence of a header before setting its value.
- *
- * @param name the name of the header to set
- * @param value the assigned date value
- *
- * @see #containsHeader
- * @see #addDateHeader
- */
- public void setDateHeader(String name, long date);
- /**
- *
- * Adds a response header with the given name and
- * date-value. The date is specified in terms of
- * milliseconds since the epoch. This method allows response headers
- * to have multiple values.
- *
- * @param name the name of the header to set
- * @param value the additional date value
- *
- * @see #setDateHeader
- */
- public void addDateHeader(String name, long date);
- /**
- *
- * Sets a response header with the given name and value.
- * If the header had already been set, the new value overwrites the
- * previous one. The <code>containsHeader</code> method can be
- * used to test for the presence of a header before setting its
- * value.
- *
- * @param name the name of the header
- * @param value the header value
- *
- * @see #containsHeader
- * @see #addHeader
- */
- public void setHeader(String name, String value);
- /**
- * Adds a response header with the given name and value.
- * This method allows response headers to have multiple values.
- *
- * @param name the name of the header
- * @param value the additional header value
- *
- * @see #setHeader
- */
- public void addHeader(String name, String value);
- /**
- * Sets a response header with the given name and
- * integer value. If the header had already been set, the new value
- * overwrites the previous one. The <code>containsHeader</code>
- * method can be used to test for the presence of a header before
- * setting its value.
- *
- * @param name the name of the header
- * @param value the assigned integer value
- *
- * @see #containsHeader
- * @see #addIntHeader
- */
- public void setIntHeader(String name, int value);
- /**
- * Adds a response header with the given name and
- * integer value. This method allows response headers to have multiple
- * values.
- *
- * @param name the name of the header
- * @param value the assigned integer value
- *
- * @see #setIntHeader
- */
- public void addIntHeader(String name, int value);
- /**
- * Sets the status code for this response. This method is used to
- * set the return status code when there is no error (for example,
- * for the status codes SC_OK or SC_MOVED_TEMPORARILY). If there
- * is an error, the <code>sendError</code> method should be used
- * instead.
- *
- * @param sc the status code
- *
- * @see #sendError
- */
- public void setStatus(int sc);
- /**
- * @deprecated As of version 2.1, due to ambiguous meaning of the
- * message parameter. To set a status code
- * use <code>setStatus(int)</code>, to send an error with a description
- * use <code>sendError(int, String)</code>.
- *
- * Sets the status code and message for this response.
- *
- * @param sc the status code
- * @param sm the status message
- */
- public void setStatus(int sc, String sm);
- /*
- * Server status codes; see RFC 2068.
- */
- /**
- * Status code (100) indicating the client can continue.
- */
- public static final int SC_CONTINUE = 100;
- /**
- * Status code (101) indicating the server is switching protocols
- * according to Upgrade header.
- */
- public static final int SC_SWITCHING_PROTOCOLS = 101;
- /**
- * Status code (200) indicating the request succeeded normally.
- */
- public static final int SC_OK = 200;
- /**
- * Status code (201) indicating the request succeeded and created
- * a new resource on the server.
- */
- public static final int SC_CREATED = 201;
- /**
- * Status code (202) indicating that a request was accepted for
- * processing, but was not completed.
- */
- public static final int SC_ACCEPTED = 202;
- /**
- * Status code (203) indicating that the meta information presented
- * by the client did not originate from the server.
- */
- public static final int SC_NON_AUTHORITATIVE_INFORMATION = 203;
- /**
- * Status code (204) indicating that the request succeeded but that
- * there was no new information to return.
- */
- public static final int SC_NO_CONTENT = 204;
- /**
- * Status code (205) indicating that the agent <em>SHOULD</em> reset
- * the document view which caused the request to be sent.
- */
- public static final int SC_RESET_CONTENT = 205;
- /**
- * Status code (206) indicating that the server has fulfilled
- * the partial GET request for the resource.
- */
- public static final int SC_PARTIAL_CONTENT = 206;
- /**
- * Status code (300) indicating that the requested resource
- * corresponds to any one of a set of representations, each with
- * its own specific location.
- */
- public static final int SC_MULTIPLE_CHOICES = 300;
- /**
- * Status code (301) indicating that the resource has permanently
- * moved to a new location, and that future references should use a
- * new URI with their requests.
- */
- public static final int SC_MOVED_PERMANENTLY = 301;
- /**
- * Status code (302) indicating that the resource has temporarily
- * moved to another location, but that future references should
- * still use the original URI to access the resource.
- */
- public static final int SC_MOVED_TEMPORARILY = 302;
- /**
- * Status code (303) indicating that the response to the request
- * can be found under a different URI.
- */
- public static final int SC_SEE_OTHER = 303;
- /**
- * Status code (304) indicating that a conditional GET operation
- * found that the resource was available and not modified.
- */
- public static final int SC_NOT_MODIFIED = 304;
- /**
- * Status code (305) indicating that the requested resource
- * <em>MUST</em> be accessed through the proxy given by the
- * <code><em>Location</em></code> field.
- */
- public static final int SC_USE_PROXY = 305;
- // Status code 306 is officially "Unused"
- /**
- * Status code (307) indicating that the requested resource
- * resides temporarily under a different URI.
- */
- public static final int SC_TEMPORARY_REDIRECT = 307;
- /**
- * Status code (400) indicating the request sent by the client was
- * syntactically incorrect.
- */
- public static final int SC_BAD_REQUEST = 400;
- /**
- * Status code (401) indicating that the request requires HTTP
- * authentication.
- */
- public static final int SC_UNAUTHORIZED = 401;
- /**
- * Status code (402) reserved for future use.
- */
- public static final int SC_PAYMENT_REQUIRED = 402;
- /**
- * Status code (403) indicating the server understood the request
- * but refused to fulfill it.
- */
- public static final int SC_FORBIDDEN = 403;
- /**
- * Status code (404) indicating that the requested resource is not
- * available.
- */
- public static final int SC_NOT_FOUND = 404;
- /**
- * Status code (405) indicating that the method specified in the
- * <code><em>Request-Line</em></code> is not allowed for the resource
- * identified by the <code><em>Request-URI</em></code>.
- */
- public static final int SC_METHOD_NOT_ALLOWED = 405;
- /**
- * Status code (406) indicating that the resource identified by the
- * request is only capable of generating response entities which have
- * content characteristics not acceptable according to the accept
- * headerssent in the request.
- */
- public static final int SC_NOT_ACCEPTABLE = 406;
- /**
- * Status code (407) indicating that the client <em>MUST</em> first
- * authenticate itself with the proxy.
- */
- public static final int SC_PROXY_AUTHENTICATION_REQUIRED = 407;
- /**
- * Status code (408) indicating that the client did not produce a
- * requestwithin the time that the server was prepared to wait.
- */
- public static final int SC_REQUEST_TIMEOUT = 408;
- /**
- * Status code (409) indicating that the request could not be
- * completed due to a conflict with the current state of the
- * resource.
- */
- public static final int SC_CONFLICT = 409;
- /**
- * Status code (410) indicating that the resource is no longer
- * available at the server and no forwarding address is known.
- * This condition <em>SHOULD</em> be considered permanent.
- */
- public static final int SC_GONE = 410;
- /**
- * Status code (411) indicating that the request cannot be handled
- * without a defined <code><em>Content-Length</em></code>.
- */
- public static final int SC_LENGTH_REQUIRED = 411;
- /**
- * Status code (412) indicating that the precondition given in one
- * or more of the request-header fields evaluated to false when it
- * was tested on the server.
- */
- public static final int SC_PRECONDITION_FAILED = 412;
- /**
- * Status code (413) indicating that the server is refusing to process
- * the request because the request entity is larger than the server is
- * willing or able to process.
- */
- public static final int SC_REQUEST_ENTITY_TOO_LARGE = 413;
- /**
- * Status code (414) indicating that the server is refusing to service
- * the request because the <code><em>Request-URI</em></code> is longer
- * than the server is willing to interpret.
- */
- public static final int SC_REQUEST_URI_TOO_LONG = 414;
- /**
- * Status code (415) indicating that the server is refusing to service
- * the request because the entity of the request is in a format not
- * supported by the requested resource for the requested method.
- */
- public static final int SC_UNSUPPORTED_MEDIA_TYPE = 415;
- /**
- * Status code (416) indicating that the server cannot serve the
- * requested byte range.
- */
- public static final int SC_REQUESTED_RANGE_NOT_SATISFIABLE = 416;
- /**
- * Status code (417) indicating that the server could not meet the
- * expectation given in the Expect request header.
- */
- public static final int SC_EXPECTATION_FAILED = 417;
- /**
- * Status code (500) indicating an error inside the HTTP server
- * which prevented it from fulfilling the request.
- */
- public static final int SC_INTERNAL_SERVER_ERROR = 500;
- /**
- * Status code (501) indicating the HTTP server does not support
- * the functionality needed to fulfill the request.
- */
- public static final int SC_NOT_IMPLEMENTED = 501;
- /**
- * Status code (502) indicating that the HTTP server received an
- * invalid response from a server it consulted when acting as a
- * proxy or gateway.
- */
- public static final int SC_BAD_GATEWAY = 502;
- /**
- * Status code (503) indicating that the HTTP server is
- * temporarily overloaded, and unable to handle the request.
- */
- public static final int SC_SERVICE_UNAVAILABLE = 503;
- /**
- * Status code (504) indicating that the server did not receive
- * a timely response from the upstream server while acting as
- * a gateway or proxy.
- */
- public static final int SC_GATEWAY_TIMEOUT = 504;
- /**
- * Status code (505) indicating that the server does not support
- * or refuses to support the HTTP protocol version that was used
- * in the request message.
- */
- public static final int SC_HTTP_VERSION_NOT_SUPPORTED = 505;
- }