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VCAFE.3.0A
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HttpServletResponse.java
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/*
* @(#)HttpServletResponse.java 1.26 97/10/20
*
* Copyright (c) 1995-1997 Sun Microsystems, Inc. All Rights Reserved.
*
* This software is the confidential and proprietary information of Sun
* Microsystems, Inc. ("Confidential Information"). You shall not
* disclose such Confidential Information and shall use it only in
* accordance with the terms of the license agreement you entered into
* with Sun.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
* SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
* SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
* THIS SOFTWARE OR ITS DERIVATIVES.
*
* CopyrightVersion 1.0
*/
package javax.servlet.http;
import javax.servlet.ServletResponse;
import java.io.IOException;
/**
* An HTTP servlet response. This interface allows a servlet's
* <code>service</code> method to manipulate HTTP-protocol specified
* header information and return data to its client. It is implemented
* by network service developers for use within servlets.
*
*
* @version 1.26, 10/20/97
*/
public
interface HttpServletResponse extends ServletResponse {
/**
* Adds the specified cookie to the response. It 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);
/**
* Checks whether the response message header has a field with
* the specified name.
*
* @param name the header field name
* @return true if the response message header has a field with
* the specified name; false otherwise
*/
public boolean containsHeader(String name);
/**
* Sets the status code and message for this response. If the
* field had already been set, the new value overwrites the
* previous one. The message is sent as the body of an HTML
* page, which is returned to the user to describe the problem.
* The page is sent with a default HTML header; the message
* is enclosed in simple body tags (<body></body>).
*
* @param sc the status code
* @param sm the status message
*/
public void setStatus(int sc, String sm);
/**
* 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);
/**
*
* Adds a field to the response header with the given name and value.
* If the field 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 field
* @param value the header field's value
*
* @see #containsHeader
*/
public void setHeader(String name, String value);
/**
* Adds a field to the response header with the given name and
* integer value. If the field 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 field
* @param value the header field's integer value
*
* @see #containsHeader
*/
public void setIntHeader(String name, int value);
/**
*
* Adds a field to the response header with the given name and
* date-valued field. The date is specified in terms of
* milliseconds since the epoch. If the date field 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 field
* @param value the header field's date value
*
* @see #containsHeader
*/
public void setDateHeader(String name, long date);
/**
* Sends an error response to the client using the specified status
* code and descriptive message. If setStatus has previously been
* called, it is reset to the error status code. The message is
* sent as the body of an HTML page, which is returned to the user
* to describe the problem. The page is sent with a default HTML
* header; the message is enclosed in simple body tags
* (<body></body>).
*
* @param sc the status code
* @param msg the detail message
* @exception IOException If an I/O error has occurred. */
public void sendError(int sc, String msg) throws IOException;
/**
* Sends an error response to the client using the specified
* status code and a default message.
* @param sc the status code
* @exception IOException If an I/O error has occurred.
*/
public void sendError(int sc) throws IOException;
/**
* Sends a temporary redirect response to the client using the
* specified redirect location URL. The URL must be absolute (for
* example, <code><em>https://hostname/path/file.html</em></code>).
* Relative URLs are not permitted here.
*
* @param location the redirect location URL
* @exception IOException If an I/O error has occurred.
*/
public void sendRedirect(String location) throws IOException;
/**
* 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 should include 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>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
* should include the logic to determine whether the session ID
* needs to be encoded in the URL. Because the rules for making
* this determination 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 HttpServletResponse.sendRedirect
* method should be run through this method. Otherwise, URL
* rewriting canont 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);
/*
* 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 (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 (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;
}