Package org.apache.struts2.components

Class Link

java.lang.Object

org.apache.struts2.components.Component

org.apache.struts2.components.UIBean

org.apache.struts2.components.Link

public class Link
extends UIBean

Add nonce propagation feature to implement CSP in link tags

The link tag allows the user to load external resources, most usually style sheets. External resources can inject malicious code and perform XSS and data injection attacks. The s:link tag includes a nonce attribute that is being randomly generated with each request and only allows links with the valid nonce value to be executed.

Examples

 <s:link ... />

 

Field Summary

Fields

Modifier and Type	Field	Description
protected String	as
protected String	crossorigin
protected String	href
protected String	hreflang
protected String	media
protected String	referrerpolicy
protected String	rel
protected String	sizes
protected String	type

Fields inherited from class org.apache.struts2.components.UIBean

accesskey, ATTR_FIELD_VALUE, ATTR_NAME_VALUE, ATTR_VALUE, cssClass, cssErrorClass, cssErrorStyle, cssStyle, defaultTemplateDir, defaultUITheme, disabled, dynamicAttributes, errorPosition, id, javascriptTooltip, key, label, labelPosition, labelSeparator, name, onblur, onchange, onclick, ondblclick, onfocus, onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover, onmouseup, onselect, request, requiredLabel, requiredPosition, response, tabindex, template, templateDir, templateEngineManager, templateSuffix, theme, title, tooltip, tooltipConfig, tooltipCssClass, tooltipDelay, tooltipIconPath, uiStaticContentPath, uiThemeExpansionToken, value

Fields inherited from class org.apache.struts2.components.Component

actionMapper, attributes, COMPONENT_STACK, devMode, escapeHtmlBody, performClearTagStateForTagPoolingServers, stack, standardAttributesMap, throwExceptionOnELFailure

Constructor Summary

Constructors

Constructor	Description
Link(ValueStack stack, jakarta.servlet.http.HttpServletRequest request, jakarta.servlet.http.HttpServletResponse response)

Method Summary

Modifier and Type	Method	Description
protected void	evaluateExtraParams()
protected String	getDefaultTemplate()	A contract that requires each concrete UI Tag to specify which template should be used as a default.
void	setAs(String as)
void	setCrossorigin(String crossorigin)
void	setHref(String href)
void	setHreflang(String hreflang)
void	setMedia(String media)
void	setReferrerpolicy(String referrerpolicy)
void	setRel(String rel)
void	setSizes(String sizes)
void	setType(String type)

Methods inherited from class org.apache.struts2.components.UIBean

addFormParameter, applyValueParameter, buildTemplateName, copyAttributes, enableAncestorFormCustomOnsubmit, end, ensureAttributeSafelyNotEscaped, escape, evaluateNameValue, evaluateParams, getId, getTemplate, getTemplateDir, getTheme, getTooltipConfig, getValueClassType, lazyEvaluation, mergeTemplate, populateComponentHtmlId, setAccesskey, setCssClass, setCssErrorClass, setCssErrorStyle, setCssStyle, setDefaultTemplateDir, setDefaultUITheme, setDisabled, setDynamicAttributes, setErrorPosition, setId, setJavascriptTooltip, setKey, setLabel, setLabelPosition, setLabelSeparator, setName, setOnblur, setOnchange, setOnclick, setOndblclick, setOnfocus, setOnkeydown, setOnkeypress, setOnkeyup, setOnmousedown, setOnmousemove, setOnmouseout, setOnmouseover, setOnmouseup, setOnselect, setRequiredLabel, setRequiredPosition, setStaticContentPath, setStyle, setTabindex, setTemplate, setTemplateDir, setTemplateEngineManager, setTheme, setTitle, setTooltip, setTooltipConfig, setTooltipCssClass, setTooltipDelay, setTooltipIconPath, setUIThemeExpansionToken, setValue

Methods inherited from class org.apache.struts2.components.Component

addAllAttributes, addParameter, completeExpression, determineActionURL, determineNamespace, end, escapeHtmlBody, fieldError, findAncestor, findString, findString, findValue, findValue, findValue, getAttributes, getComponentStack, getNamespace, getPerformClearTagStateForTagPoolingServers, getStack, getStandardAttributes, isAcceptableExpression, isValidTagAttribute, popComponentStack, setActionMapper, setDevMode, setEscapeHtmlBody, setNotExcludedAcceptedPatterns, setPerformClearTagStateForTagPoolingServers, setThrowExceptionsOnELFailure, setUrlHelper, start, stripExpression, toString, usesBody

Methods inherited from class java.lang.Object

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

Field Details

href

protected String href

hreflang

protected String hreflang

rel

protected String rel

media

protected String media

referrerpolicy

protected String referrerpolicy

sizes

protected String sizes

crossorigin

protected String crossorigin

type

protected String type

as

protected String as

Constructor Details

Link

public Link(ValueStack stack,
 jakarta.servlet.http.HttpServletRequest request,
 jakarta.servlet.http.HttpServletResponse response)

Method Details

setHref

public void setHref(String href)

setHreflang

public void setHreflang(String hreflang)

setRel

public void setRel(String rel)

setSizes

public void setSizes(String sizes)

setCrossorigin

public void setCrossorigin(String crossorigin)

setType

public void setType(String type)

setAs

public void setAs(String as)

setMedia

public void setMedia(String media)

setReferrerpolicy

public void setReferrerpolicy(String referrerpolicy)

getDefaultTemplate

protected String getDefaultTemplate()

Description copied from class: UIBean

A contract that requires each concrete UI Tag to specify which template should be used as a default. For example, the CheckboxTab might return "checkbox.vm" while the RadioTag might return "radio.vm". This value not begin with a '/' unless you intend to make the path absolute rather than relative to the current theme.

Specified by:

getDefaultTemplate in class UIBean

Returns:

The name of the template to be used as the default.

evaluateExtraParams

protected void evaluateExtraParams()

Overrides:

evaluateExtraParams in class UIBean