org.springframework.web.util

Class UrlPathHelper

java.lang.Object

org.springframework.web.util.UrlPathHelper

public class UrlPathHelper
extends Object

Helper class for URL path matching. Provides support for URL paths in RequestDispatcher includes and support for consistent URL decoding.

Used by AbstractUrlHandlerMapping and RequestContext for path matching and/or URI determination.

Since:

14.01.2004

Author:

Juergen Hoeller, Rob Harrop, Rossen Stoyanchev

See Also:

getLookupPathForRequest(javax.servlet.http.HttpServletRequest, java.lang.String), RequestDispatcher

Field Summary

Fields

Modifier and Type	Field and Description
static UrlPathHelper	defaultInstance Shared, read-only instance with defaults.
static String	PATH_ATTRIBUTE Name of Servlet request attribute that holds a resolved lookupPath.
static UrlPathHelper	rawPathInstance Shared, read-only instance for the full, encoded path.

Constructor Summary

Constructors

Constructor and Description
UrlPathHelper()

Method Summary

Modifier and Type	Method and Description
MultiValueMap<String,String>	decodeMatrixVariables(HttpServletRequest request, MultiValueMap<String,String> vars) Decode the given matrix variables via decodeRequestString(javax.servlet.http.HttpServletRequest, java.lang.String) unless setUrlDecode(boolean) is set to true in which case it is assumed the URL path from which the variables were extracted is already decoded through a call to getLookupPathForRequest(HttpServletRequest).
Map<String,String>	decodePathVariables(HttpServletRequest request, Map<String,String> vars) Decode the given URI path variables via decodeRequestString(javax.servlet.http.HttpServletRequest, java.lang.String) unless setUrlDecode(boolean) is set to true in which case it is assumed the URL path from which the variables were extracted is already decoded through a call to getLookupPathForRequest(HttpServletRequest).
String	decodeRequestString(HttpServletRequest request, String source) Decode the given source string with a URLDecoder.
protected String	determineEncoding(HttpServletRequest request) Determine the encoding for the given request.
String	getContextPath(HttpServletRequest request) Return the context path for the given request, detecting an include request URL if called within a RequestDispatcher include.
protected String	getDefaultEncoding() Return the default character encoding to use for URL decoding.
String	getLookupPathForRequest(HttpServletRequest request) Return the mapping lookup path for the given request, within the current servlet mapping if applicable, else within the web application.
String	getLookupPathForRequest(HttpServletRequest request, String name) Deprecated. as of 5.3 in favor of using resolveAndCacheLookupPath(HttpServletRequest) and getResolvedLookupPath(ServletRequest).
String	getOriginatingContextPath(HttpServletRequest request) Return the context path for the given request, detecting an include request URL if called within a RequestDispatcher include.
String	getOriginatingQueryString(HttpServletRequest request) Return the query string part of the given request's URL.
String	getOriginatingRequestUri(HttpServletRequest request) Return the request URI for the given request.
String	getOriginatingServletPath(HttpServletRequest request) Return the servlet path for the given request, detecting an include request URL if called within a RequestDispatcher include.
String	getPathWithinApplication(HttpServletRequest request) Return the path within the web application for the given request.
String	getPathWithinServletMapping(HttpServletRequest request) Return the path within the servlet mapping for the given request, i.e.
protected String	getPathWithinServletMapping(HttpServletRequest request, String pathWithinApp) Return the path within the servlet mapping for the given request, i.e.
String	getRequestUri(HttpServletRequest request) Return the request URI for the given request, detecting an include request URL if called within a RequestDispatcher include.
static String	getResolvedLookupPath(ServletRequest request) Return a previously resolved lookupPath.
String	getServletPath(HttpServletRequest request) Return the servlet path for the given request, regarding an include request URL if called within a RequestDispatcher include.
boolean	isUrlDecode() Whether to decode the request URI when determining the lookup path.
String	removeSemicolonContent(String requestUri) Remove ";" (semicolon) content from the given request URI if the removeSemicolonContent property is set to "true".
String	resolveAndCacheLookupPath(HttpServletRequest request) Resolve the lookupPath and cache it in a request attribute with the key PATH_ATTRIBUTE for subsequent access via getResolvedLookupPath(ServletRequest).
void	setAlwaysUseFullPath(boolean alwaysUseFullPath) Whether URL lookups should always use the full path within the current web application context, i.e.
void	setDefaultEncoding(String defaultEncoding) Set the default character encoding to use for URL decoding.
void	setRemoveSemicolonContent(boolean removeSemicolonContent) Set if ";" (semicolon) content should be stripped from the request URI.
void	setUrlDecode(boolean urlDecode) Whether the context path and request URI should be decoded -- both of which are returned undecoded by the Servlet API, in contrast to the servlet path.
boolean	shouldRemoveSemicolonContent() Whether configured to remove ";" (semicolon) content from the request URI.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

PATH_ATTRIBUTE

public static final String PATH_ATTRIBUTE

Name of Servlet request attribute that holds a resolved lookupPath.

Since:

5.3

defaultInstance

public static final UrlPathHelper defaultInstance

Shared, read-only instance with defaults. The following apply:

• alwaysUseFullPath=false
• urlDecode=true
• removeSemicolon=true
• defaultEncoding=WebUtils.DEFAULT_CHARACTER_ENCODING

rawPathInstance

public static final UrlPathHelper rawPathInstance

Shared, read-only instance for the full, encoded path. The following apply:

• alwaysUseFullPath=true
• urlDecode=false
• removeSemicolon=false
• defaultEncoding=WebUtils.DEFAULT_CHARACTER_ENCODING

Constructor Detail

UrlPathHelper

public UrlPathHelper()

Method Detail

setAlwaysUseFullPath

public void setAlwaysUseFullPath(boolean alwaysUseFullPath)

Whether URL lookups should always use the full path within the current web application context, i.e. within ServletContext.getContextPath().

If set to false the path within the current servlet mapping is used instead if applicable (i.e. in the case of a prefix based Servlet mapping such as "/myServlet/*").

By default this is set to "false".

setUrlDecode

public void setUrlDecode(boolean urlDecode)

Whether the context path and request URI should be decoded -- both of which are returned undecoded by the Servlet API, in contrast to the servlet path.

Either the request encoding or the default Servlet spec encoding (ISO-8859-1) is used when set to "true".

By default this is set to true.

Note: Be aware the servlet path will not match when compared to encoded paths. Therefore use of urlDecode=false is not compatible with a prefix-based Servlet mapping and likewise implies also setting alwaysUseFullPath=true.

See Also:

getServletPath(javax.servlet.http.HttpServletRequest), getContextPath(javax.servlet.http.HttpServletRequest), getRequestUri(javax.servlet.http.HttpServletRequest), WebUtils.DEFAULT_CHARACTER_ENCODING, ServletRequest.getCharacterEncoding(), URLDecoder.decode(String, String)

isUrlDecode

public boolean isUrlDecode()

Whether to decode the request URI when determining the lookup path.

Since:

4.3.13

setRemoveSemicolonContent

public void setRemoveSemicolonContent(boolean removeSemicolonContent)

Set if ";" (semicolon) content should be stripped from the request URI.

Default is "true".

shouldRemoveSemicolonContent

public boolean shouldRemoveSemicolonContent()

Whether configured to remove ";" (semicolon) content from the request URI.

setDefaultEncoding

public void setDefaultEncoding(String defaultEncoding)

Set the default character encoding to use for URL decoding. Default is ISO-8859-1, according to the Servlet spec.

If the request specifies a character encoding itself, the request encoding will override this setting. This also allows for generically overriding the character encoding in a filter that invokes the ServletRequest.setCharacterEncoding method.

Parameters:

defaultEncoding - the character encoding to use

See Also:

determineEncoding(javax.servlet.http.HttpServletRequest), ServletRequest.getCharacterEncoding(), ServletRequest.setCharacterEncoding(String), WebUtils.DEFAULT_CHARACTER_ENCODING

getDefaultEncoding

protected String getDefaultEncoding()

Return the default character encoding to use for URL decoding.

resolveAndCacheLookupPath

public String resolveAndCacheLookupPath(HttpServletRequest request)

Resolve the lookupPath and cache it in a request attribute with the key PATH_ATTRIBUTE for subsequent access via getResolvedLookupPath(ServletRequest).

Parameters:

request - the current request

Returns:

the resolved path

Since:

5.3

getResolvedLookupPath

public static String getResolvedLookupPath(ServletRequest request)

Return a previously resolved lookupPath.

Parameters:

request - the current request

Returns:

the previously resolved lookupPath

Throws:

IllegalArgumentException - if the lookup path is not found

Since:

5.3

getLookupPathForRequest

@Deprecated
public String getLookupPathForRequest(HttpServletRequest request,
                                                  @Nullable
                                                  String name)

Deprecated. as of 5.3 in favor of using resolveAndCacheLookupPath(HttpServletRequest) and getResolvedLookupPath(ServletRequest).

Variant of getLookupPathForRequest(HttpServletRequest) that automates checking for a previously computed lookupPath saved as a request attribute. The attribute is only used for lookup purposes.

Parameters:

request - current HTTP request

name - the request attribute that holds the lookupPath

Returns:

the lookup path

Since:

5.2

getLookupPathForRequest

public String getLookupPathForRequest(HttpServletRequest request)

Return the mapping lookup path for the given request, within the current servlet mapping if applicable, else within the web application.

Detects include request URL if called within a RequestDispatcher include.

Parameters:

request - current HTTP request

Returns:

the lookup path

See Also:

getPathWithinServletMapping(javax.servlet.http.HttpServletRequest), getPathWithinApplication(javax.servlet.http.HttpServletRequest)

getPathWithinServletMapping

public String getPathWithinServletMapping(HttpServletRequest request)

Return the path within the servlet mapping for the given request, i.e. the part of the request's URL beyond the part that called the servlet, or "" if the whole URL has been used to identify the servlet.

Parameters:

request - current HTTP request

Returns:

the path within the servlet mapping, or ""

See Also:

getPathWithinServletMapping(HttpServletRequest, String)

getPathWithinServletMapping

protected String getPathWithinServletMapping(HttpServletRequest request,
                                             String pathWithinApp)

Return the path within the servlet mapping for the given request, i.e. the part of the request's URL beyond the part that called the servlet, or "" if the whole URL has been used to identify the servlet.

Detects include request URL if called within a RequestDispatcher include.

E.g.: servlet mapping = "/*"; request URI = "/test/a" → "/test/a".

E.g.: servlet mapping = "/"; request URI = "/test/a" → "/test/a".

E.g.: servlet mapping = "/test/*"; request URI = "/test/a" → "/a".

E.g.: servlet mapping = "/test"; request URI = "/test" → "".

E.g.: servlet mapping = "/*.test"; request URI = "/a.test" → "".

Parameters:

request - current HTTP request

pathWithinApp - a precomputed path within the application

Returns:

the path within the servlet mapping, or ""

Since:

5.2.9

See Also:

getLookupPathForRequest(javax.servlet.http.HttpServletRequest, java.lang.String)

getPathWithinApplication

public String getPathWithinApplication(HttpServletRequest request)

Return the path within the web application for the given request.

Detects include request URL if called within a RequestDispatcher include.

Parameters:

request - current HTTP request

Returns:

the path within the web application

See Also:

getLookupPathForRequest(javax.servlet.http.HttpServletRequest, java.lang.String)

getRequestUri

public String getRequestUri(HttpServletRequest request)

Return the request URI for the given request, detecting an include request URL if called within a RequestDispatcher include.

As the value returned by request.getRequestURI() is not decoded by the servlet container, this method will decode it.

The URI that the web container resolves should be correct, but some containers like JBoss/Jetty incorrectly include ";" strings like ";jsessionid" in the URI. This method cuts off such incorrect appendices.

Parameters:

request - current HTTP request

Returns:

the request URI

getContextPath

public String getContextPath(HttpServletRequest request)

Return the context path for the given request, detecting an include request URL if called within a RequestDispatcher include.

As the value returned by request.getContextPath() is not decoded by the servlet container, this method will decode it.

Parameters:

request - current HTTP request

Returns:

the context path

getServletPath

public String getServletPath(HttpServletRequest request)

Return the servlet path for the given request, regarding an include request URL if called within a RequestDispatcher include.

As the value returned by request.getServletPath() is already decoded by the servlet container, this method will not attempt to decode it.

Parameters:

request - current HTTP request

Returns:

the servlet path

getOriginatingRequestUri

public String getOriginatingRequestUri(HttpServletRequest request)

Return the request URI for the given request. If this is a forwarded request, correctly resolves to the request URI of the original request.

getOriginatingContextPath

public String getOriginatingContextPath(HttpServletRequest request)

Return the context path for the given request, detecting an include request URL if called within a RequestDispatcher include.

As the value returned by request.getContextPath() is not decoded by the servlet container, this method will decode it.

Parameters:

request - current HTTP request

Returns:

the context path

getOriginatingServletPath

public String getOriginatingServletPath(HttpServletRequest request)

Return the servlet path for the given request, detecting an include request URL if called within a RequestDispatcher include.

Parameters:

request - current HTTP request

Returns:

the servlet path

getOriginatingQueryString

public String getOriginatingQueryString(HttpServletRequest request)

Return the query string part of the given request's URL. If this is a forwarded request, correctly resolves to the query string of the original request.

Parameters:

request - current HTTP request

Returns:

the query string

decodeRequestString

public String decodeRequestString(HttpServletRequest request,
                                  String source)

Decode the given source string with a URLDecoder. The encoding will be taken from the request, falling back to the default "ISO-8859-1".

The default implementation uses URLDecoder.decode(input, enc).

Parameters:

request - current HTTP request

source - the String to decode

Returns:

the decoded String

See Also:

WebUtils.DEFAULT_CHARACTER_ENCODING, ServletRequest.getCharacterEncoding(), URLDecoder.decode(String, String), URLDecoder.decode(String)

determineEncoding

protected String determineEncoding(HttpServletRequest request)

Determine the encoding for the given request. Can be overridden in subclasses.

The default implementation checks the request encoding, falling back to the default encoding specified for this resolver.

Parameters:

request - current HTTP request

Returns:

the encoding for the request (never null)

See Also:

ServletRequest.getCharacterEncoding(), setDefaultEncoding(java.lang.String)

removeSemicolonContent

public String removeSemicolonContent(String requestUri)

Remove ";" (semicolon) content from the given request URI if the removeSemicolonContent property is set to "true". Note that "jsessionid" is always removed.

Parameters:

requestUri - the request URI string to remove ";" content from

Returns:

the updated URI string

decodePathVariables

public Map<String,String> decodePathVariables(HttpServletRequest request,
                                              Map<String,String> vars)

Decode the given URI path variables via decodeRequestString(javax.servlet.http.HttpServletRequest, java.lang.String) unless setUrlDecode(boolean) is set to true in which case it is assumed the URL path from which the variables were extracted is already decoded through a call to getLookupPathForRequest(HttpServletRequest).

Parameters:

request - current HTTP request

vars - the URI variables extracted from the URL path

Returns:

the same Map or a new Map instance

decodeMatrixVariables

public MultiValueMap<String,String> decodeMatrixVariables(HttpServletRequest request,
                                                          MultiValueMap<String,String> vars)

Decode the given matrix variables via decodeRequestString(javax.servlet.http.HttpServletRequest, java.lang.String) unless setUrlDecode(boolean) is set to true in which case it is assumed the URL path from which the variables were extracted is already decoded through a call to getLookupPathForRequest(HttpServletRequest).

Parameters:

request - current HTTP request

vars - the URI variables extracted from the URL path

Returns:

the same Map or a new Map instance