Class HmacTokenTagHelper

A TagHelper implementation targeting <img> element that allows the automatic generation of HMAC image processing protection tokens.

Inheritance
object
TagHelper
UrlResolutionTagHelper
HmacTokenTagHelper
Implements
Inherited Members
Namespace: SixLabors.ImageSharp.Web.TagHelpers
Assembly: SixLabors.ImageSharp.Web.dll
Syntax
[HtmlTargetElement("img", Attributes = "src", TagStructure = TagStructure.WithoutEndTag)]
public class HmacTokenTagHelper : UrlResolutionTagHelper, ITagHelper, ITagHelperComponent

Constructors

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HmacTokenTagHelper(IOptions<ImageSharpMiddlewareOptions>, RequestAuthorizationUtilities, IUrlHelperFactory, HtmlEncoder)

Initializes a new instance of the HmacTokenTagHelper class.

Declaration
public HmacTokenTagHelper(IOptions<ImageSharpMiddlewareOptions> options, RequestAuthorizationUtilities authorizationUtilities, IUrlHelperFactory urlHelperFactory, HtmlEncoder htmlEncoder)
Parameters
Type Name Description
IOptions<ImageSharpMiddlewareOptions> options

The middleware configuration options.
RequestAuthorizationUtilities authorizationUtilities

Contains helpers that allow authorization of image requests.
IUrlHelperFactory urlHelperFactory

The URL helper factory.
HtmlEncoder htmlEncoder

The HTML encoder.

Properties

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Order

When a set of ITagHelpers are executed, their Init(TagHelperContext)'s are first invoked in the specified Order; then their ProcessAsync(TagHelperContext, TagHelperOutput)'s are invoked in the specified Order. Lower values are executed first.

Declaration
public override int Order { get; }
Property Value
Type Description
int
Overrides
Remarks

Default order is 0.

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Src

Gets or sets the source of the image.

Declaration
[HtmlAttributeName("src")]
public string? Src { get; set; }
Property Value
Type Description
string
Remarks

Passed through to the generated HTML in all cases.

Methods

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Process(TagHelperContext, TagHelperOutput)

Synchronously executes the TagHelper with the given context and output.

Declaration
public override void Process(TagHelperContext context, TagHelperOutput output)
Parameters
Type Name Description
TagHelperContext context

Contains information associated with the current HTML tag.
TagHelperOutput output

A stateful HTML element used to generate an HTML tag.
Overrides

Implements