User Guide Cancel

Request interface

Last updated on May 30, 2024 | Also applies to ColdFusion

CFML Reference User Guide
ColdFusion functions
ColdFusion Tags
1. ColdFusion tag summary
2. ColdFusion tags by category
  1. Application framework tags
    1. cfapplication
    2. cfassociate
    3. cferror
    4. cfimport
    5. cfinterface
    6. cflock
    7. cfscript
    8. cfthread
  2. Communications tags
  3. Database manipulation tags
  4. Data output tags
    1. cfchart
    2. cfchartdata
    3. cfchartseries
    4. cfcol
    5. cfcontent
    6. cfdocument
    7. cfdocumentitem
    8. cfdocumentsection
    9. cfflush
    10. cfheader
    11. cflog
    12. cfoutput
    13. cfpresentation
    14. cfpresentationslide
    15. cfpresenter
    16. cfprocessingdirective
    17. cfprint
    18. cfreport
    19. cfreportparam
    20. cfsilent
    21. cftable
  5. Debugging tags
    1. cfdump
    2. cftimer
    3. cftrace
  6. Exception handling tags
    1. cfcatch
    2. cferror
    3. cffinally
    4. cfrethrow
    5. cfthrow
    6. cftry
  7. Extensibility tags
    1. cfchart
    2. cfchartdata
    3. cfchartseries
    4. cfcollection
    5. cfcomponent
    6. cfexecute
    7. cfftp
    8. function
    9. cfindex
    10. cfinterface
    11. cfinvoke
    12. cfinvokeargument
    13. cfobject
    14. cfproperty
    15. cfreport
    16. cfreportparam
    17. cfreturn
    18. cfsearch
    19. cfsharepoint
    20. cfspreadsheet
    21. cfwddx
    22. cfxml
  8. File management tags
    1. cfdirectory
    2. cffile
    3. cffileupload
    4. cfftp
    5. cfzip
    6. cfzipparam
  9. Flow-control tags
    1. cfabort
    2. cfbreak
    3. cfcase
    4. cfcontinue
    5. cfdefaultcase
    6. cfelse
    7. cfelseif
    8. cfexecute
    9. cfexit
    10. cfif
    11. cfinclude
    12. cflocation
    13. cfloop
    14. cfrethrow
    15. cfswitch
    16. cfthrow
    17. cftry
  10. Forms tags
    1. cfapplet
    2. cfcalendar
    3. cffileupload
    4. cfform
    5. cfformgroup
    6. cfformitem
    7. cfgrid
    8. cfgridcolumn
    9. cfgridrow
    10. cfgridupdate
    11. cfinput
    12. cfpdf
    13. cfpdfform
    14. cfpdfformparam
    15. cfpdfparam
    16. cfpdfsubform
    17. cfselect
    18. cfslider
    19. cftextarea
    20. cftree
    21. cftreeitem
  11. Internet Protocol tags
    1. cfajaximport
    2. cfajaxproxy
    3. cfftp
    4. cffeed
    5. cfimap
    6. cfhttp
    7. cfhttpparam
    8. cfldap
    9. cfmail
    10. cfmailparam
    11. cfmailpart
    12. cfpop
    13. cfsprydataset
  12. Page processing tags
    1. cfcache
    2. cfcontent
    3. cfflush
    4. cfheader
    5. cfhtmlhead
    6. cfinclude
    7. cfprocessingdirective
    8. cfsetting
    9. cfsilent
  13. Security tags
  14. Variable manipulation tags
    1. cfcookie
    2. cfdump
    3. cfparam
    4. cfregistry
    5. cfsavecontent
    6. cfschedule
    7. cfset
    8. cfsetting
  15. Other tags
    1. cfimage
    2. cflog
    3. cfregistry
3. Tags a-b
4. Tags c
  1. cfcache
  2. cfcalendar
  3. cfcase
  4. cfcatch
  5. cfchart
  6. cfchartdata
  7. cfchartseries
  8. cfclient
  9. cfclientsettings
  10. cfcol
  11. cfcollection
  12. cfcomponent
  13. cfcontent
  14. cfcontinue
  15. cfcookie
  16. Tags d-e
5. Tags f
6. Tags g-h
  1. cfgraph
  2. cfgraphdata
  3. cfgrid
  4. cfgridcolumn
  5. cfgridrow
  6. cfgridupdate
  7. cfheader
  8. cfhtmlhead
  9. cfhtmltopdf
  10. cfhtmltopdfitem
  11. cfhttp
  12. cfhttpparam
7. Tags i
  1. cfif
  2. cfimage
  3. cfimap
  4. cfimapfilter
  5. cfimpersonate
  6. cfimport
  7. cfinclude
  8. cfindex
  9. cfinput
  10. cfinsert
  11. cfinterface
  12. cfinvoke
  13. cfinvokeargument
8. Tags j-l
9. Tags m-o
10. Tags p-q
  1. cfparam
  2. cfpdf
  3. cfpdfform
  4. cfpdfformparam
  5. cfpdfparam
  6. cfpdfsubform
  7. cfpod
  8. cfpop
  9. cfpresentation
  10. cfpresentationslide
  11. cfpresenter
  12. cfprint
  13. cfprocessingdirective
  14. cfprocparam
  15. cfprocresult
  16. cfprogressbar
  17. cfproperty
  18. cfquery
  19. cfqueryparam
11. Tags r-s
  1. cfregistry
  2. cfreport
  3. cfreportparam
  4. cfrethrow
  5. cfreturn
  6. cfsavecontent
  7. cfschedule
  8. cfscript
  9. cfsearch
  10. cfselect
  11. cfservlet
  12. cfservletparam
  13. cfset
  14. cfsetting
  15. cfsharepoint
  16. cfsilent
  17. cfslider
  18. cfspreadsheet
  19. cfsprydataset
  20. cfstoredproc
  21. cfswitch
12. Tags t
  1. cftable
  2. cftextarea
  3. cftextinput
  4. cfthread
  5. cfthrow
  6. cftimer
  7. cftooltip
  8. cftrace
  9. cftransaction
  10. cftree
  11. cftreeitem
  12. cftry
13. Tags u-z
  1. cfupdate
  2. cfwddx
  3. cfwebsocket
  4. cfwindow
  5. cfxml
  6. cfzip
  7. cfzipparam
CFML Reference
1. Reserved words and variables
2. Ajax JavaScript functions
3. ColdFusion ActionScript functions
4. ColdFusion mobile functions
5. Application.cfc reference
6. Script functions implemented as CFCs
7. ColdFusion Flash Form style reference
8. ColdFusion event gateway reference
9. ColdFusion C++ CFX Reference
10. ColdFusion Java CFX reference
11. WDDX JavaScript Objects
Cloud services

public abstract interface Request

Interface to a request made to a CustomTag. The interface includes methods for retrieving attributes passed to the tag (including queries) and reading global tag settings.

Methods

Returns	Syntax	Description
boolean	attributeExists(String name)	Checks whether the attribute was passed to this tag.
boolean	debug()	Checks whether the tag contains the debug attribute.
String	getAttribute(String name)	Retrieves the value of the passed attribute.
String	getAttributeList()	Retrieves a list of attributes passed to the tag.
int	getIntAttribute(String name)	Retrieves the value of the passed attribute as an integer.
int	getIntAttribute(String name, int def)	Retrieves the value of the passed attribute as an integer (returns default if the attribute does not exist or is not a valid number).
Query	getQuery()	Retrieves the query that was passed to this tag.

attributeExists

Description

Checks whether the attribute was passed to this tag. Returns True if the attribute is available; otherwise returns False.

Category

Request interface

Syntax

public boolean attributeExists(String name)

Parameters

Parameter	Description
name	Name of the attribute to check (case-insensitive)

Example

The following example checks whether the user passed an attribute named DESTINATION to the tag; if not, it throws an exception:

if ( ! request.attributeExists("DESTINATION") )
{
throw new Exception(
"Missing DESTINATION parameter",
"You must pass a DESTINATION parameter in "
"order for this tag to work correctly." ) ;
} ;

debug

Description

Checks whether the tag contains the debug attribute. Use this method to determine whether to write debug information for this request. For more information, see writeDebug. Returns True if the tag contains the debug attribute; False, otherwise.

Category

Request interface

Syntax

public boolean debug()

Example

The following example checks whether the debug attribute is present, and if so, it writes a brief debug message:

if ( request.debug() )
{
response.writeDebug( "debug info" ) ;
}

getAttribute

Description

Retrieves the value of a passed attribute. Returns an empty string if the attribute does not exist (use attributeExists to test whether an attribute was passed to the tag). Use getAttribute(String,String) to return a default value rather than an empty string. Returns the value of the attribute passed to the tag. If no attribute of that name was passed to the tag, an empty string is returned.

Category

Request interface

Syntax

public String getAttribute(String name)

Parameters

Parameter	Description
name	The attribute to retrieve (case-insensitive)

Example

The following example retrieves an attribute named DESTINATION and writes its value back to the user:

String strDestination = request.getAttribute("DESTINATION") ;
response.write( "The destination is: " + strDestination ) ;

getAttributeList

Description

Retrieves a list of attributes passed to the tag. To retrieve the value of one attribute, use the getAttribute method. Returns an array of strings containing the names of the attributes passed to the tag.

Category

Request interface

Syntax

public String[] getAttributeList()

Example

The following example retrieves the list of attributes, then iterates over the list, writing each attribute and its value back to the user:

String[] attribs = request.getAttributeList() ;
int nNumAttribs = attribs.length ;

for( int i = 0; i < nNumAttribs; i++ )
{
String strName = attribs[i] ;
String strValue = request.getAttribute( strName ) ;
response.write( strName + "=" + strValue + "<BR>" ) ;
}

getIntAttribute

Description

Retrieves the value of the passed attribute as an integer. Returns -1 if the attribute does not exist. Use attributeExists to test whether an attribute was passed to the tag. Use getIntAttribute(String,int) to return a default value rather than throwing an exception or returning -1. Returns the value of the attribute passed to the tag. If no attribute of that name was passed to the tag, -1 is returned.

Category

Request interface

Syntax

public int getIntAttribute(String name)

Throws

NumberFormatException if the attribute is not a valid number.

Parameters

Parameter	Description
name	The attribute to retrieve (case-insensitive)

Example

The following example retrieves an attribute named PORT and writes its value back to the user:

int nPort = request.getIntAttribute("PORT") ;
if ( nPort != -1 )
response.write( "The port is: " + String.valueOf(nPort) ) ;

getQuery

Description

Retrieves the query that was passed to this tag. To pass a query to a custom tag, you use the query attribute. It should be set to the name of a query (created using the cfquery tag). The query attribute is optional and should be used only by tags that process an existing dataset. Returns the Query that was passed to the tag. If no query was passed, returns null.

Category

Request interface

Syntax

public Query getQuery()

Example

The following example retrieves a query that was passed to a tag. If no query was passed, an exception is thrown:

Query query = request.getQuery() ;
if ( query == null )
{
throw new Exception(
"Missing QUERY parameter. " +
"You must pass a QUERY parameter in "
"order for this tag to work correctly." ) ;
}

getSetting

Description

Retrieves the value of a global custom tag setting. Custom tag settings are stored in the CustomTags section of the ColdFusion Registry key.Returns the value of the custom tag setting. If no setting of that name exists, an empty string is returned.

Category

Request interface

Syntax

public String getSetting(String name)

Parameters

Parameter	Description
name	The name of the setting to retrieve (case-insensitive)

Usage

All custom tags implemented in Java share a registry key for storing settings. To avoid name conflicts, preface the names of settings with the name of your custom tag class. For example, the code below retrieves the value of a setting named VerifyAddress for a custom tag class named MyCustomTag:

String strVerify = request.getSetting("MyCustomTag.VerifyAddress") ;
if ( Boolean.valueOf(strVerify) )
{
// Do address verification...
}

Adobe

Get help faster and easier

New user?

Request interface

Methods

attributeExists

Description

Category

Syntax

See also

Parameters

Example

debug

Description

Category

Syntax

See also

Example

getAttribute

Description

Category

Syntax

See also

Parameters

Example

getAttributeList

Description

Category

Syntax

See also

Example

getIntAttribute

Description

Category

Syntax

Throws

See also

Parameters

Example

getQuery

Description

Category

Syntax

Example

getSetting

Description

Category

Syntax

Parameters

Usage

Get help faster and easier