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/** * @fileoverview added by tsickle * Generated from: packages/core/src/sanitization/sanitization.ts * @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc */ /** * @license * Copyright Google Inc. All Rights Reserved. * * Use of this source code is governed by an MIT-style license that can be * found in the LICENSE file at https://angular.io/license */ import { getDocument } from '../render3/interfaces/document'; import { SANITIZER } from '../render3/interfaces/view'; import { getLView } from '../render3/state'; import { renderStringify } from '../render3/util/misc_utils'; import { allowSanitizationBypassAndThrow, unwrapSafeValue } from './bypass'; import { _sanitizeHtml as _sanitizeHtml } from './html_sanitizer'; import { SecurityContext } from './security'; import { _sanitizeStyle } from './style_sanitizer'; import { _sanitizeUrl as _sanitizeUrl } from './url_sanitizer'; /** * An `html` sanitizer which converts untrusted `html` **string** into trusted string by removing * dangerous content. * * This method parses the `html` and locates potentially dangerous content (such as urls and * javascript) and removes it. * * It is possible to mark a string as trusted by calling {\@link bypassSanitizationTrustHtml}. * * \@publicApi * @param {?} unsafeHtml untrusted `html`, typically from the user. * @return {?} `html` string which is safe to display to user, because all of the dangerous javascript * and urls have been removed. * */ export function ɵɵsanitizeHtml(unsafeHtml) { /** @type {?} */ const sanitizer = getSanitizer(); if (sanitizer) { return sanitizer.sanitize(SecurityContext.HTML, unsafeHtml) || ''; } if (allowSanitizationBypassAndThrow(unsafeHtml, "HTML" /* Html */)) { return unwrapSafeValue(unsafeHtml); } return _sanitizeHtml(getDocument(), renderStringify(unsafeHtml)); } /** * A `style` sanitizer which converts untrusted `style` **string** into trusted string by removing * dangerous content. * * This method parses the `style` and locates potentially dangerous content (such as urls and * javascript) and removes it. * * It is possible to mark a string as trusted by calling {\@link bypassSanitizationTrustStyle}. * * \@publicApi * @param {?} unsafeStyle untrusted `style`, typically from the user. * @return {?} `style` string which is safe to bind to the `style` properties, because all of the * dangerous javascript and urls have been removed. * */ export function ɵɵsanitizeStyle(unsafeStyle) { /** @type {?} */ const sanitizer = getSanitizer(); if (sanitizer) { return sanitizer.sanitize(SecurityContext.STYLE, unsafeStyle) || ''; } if (allowSanitizationBypassAndThrow(unsafeStyle, "Style" /* Style */)) { return unwrapSafeValue(unsafeStyle); } return _sanitizeStyle(renderStringify(unsafeStyle)); } /** * A `url` sanitizer which converts untrusted `url` **string** into trusted string by removing * dangerous * content. * * This method parses the `url` and locates potentially dangerous content (such as javascript) and * removes it. * * It is possible to mark a string as trusted by calling {\@link bypassSanitizationTrustUrl}. * * \@publicApi * @param {?} unsafeUrl untrusted `url`, typically from the user. * @return {?} `url` string which is safe to bind to the `src` properties such as `<img src>`, because * all of the dangerous javascript has been removed. * */ export function ɵɵsanitizeUrl(unsafeUrl) { /** @type {?} */ const sanitizer = getSanitizer(); if (sanitizer) { return sanitizer.sanitize(SecurityContext.URL, unsafeUrl) || ''; } if (allowSanitizationBypassAndThrow(unsafeUrl, "URL" /* Url */)) { return unwrapSafeValue(unsafeUrl); } return _sanitizeUrl(renderStringify(unsafeUrl)); } /** * A `url` sanitizer which only lets trusted `url`s through. * * This passes only `url`s marked trusted by calling {\@link bypassSanitizationTrustResourceUrl}. * * \@publicApi * @param {?} unsafeResourceUrl untrusted `url`, typically from the user. * @return {?} `url` string which is safe to bind to the `src` properties such as `<img src>`, because * only trusted `url`s have been allowed to pass. * */ export function ɵɵsanitizeResourceUrl(unsafeResourceUrl) { /** @type {?} */ const sanitizer = getSanitizer(); if (sanitizer) { return sanitizer.sanitize(SecurityContext.RESOURCE_URL, unsafeResourceUrl) || ''; } if (allowSanitizationBypassAndThrow(unsafeResourceUrl, "ResourceURL" /* ResourceUrl */)) { return unwrapSafeValue(unsafeResourceUrl); } throw new Error('unsafe value used in a resource URL context (see http://g.co/ng/security#xss)'); } /** * A `script` sanitizer which only lets trusted javascript through. * * This passes only `script`s marked trusted by calling {\@link * bypassSanitizationTrustScript}. * * \@publicApi * @param {?} unsafeScript untrusted `script`, typically from the user. * @return {?} `url` string which is safe to bind to the `<script>` element such as `<img src>`, * because only trusted `scripts` have been allowed to pass. * */ export function ɵɵsanitizeScript(unsafeScript) { /** @type {?} */ const sanitizer = getSanitizer(); if (sanitizer) { return sanitizer.sanitize(SecurityContext.SCRIPT, unsafeScript) || ''; } if (allowSanitizationBypassAndThrow(unsafeScript, "Script" /* Script */)) { return unwrapSafeValue(unsafeScript); } throw new Error('unsafe value used in a script context'); } /** * Detects which sanitizer to use for URL property, based on tag name and prop name. * * The rules are based on the RESOURCE_URL context config from * `packages/compiler/src/schema/dom_security_schema.ts`. * If tag and prop names don't match Resource URL schema, use URL sanitizer. * @param {?} tag * @param {?} prop * @return {?} */ export function getUrlSanitizer(tag, prop) { if ((prop === 'src' && (tag === 'embed' || tag === 'frame' || tag === 'iframe' || tag === 'media' || tag === 'script')) || (prop === 'href' && (tag === 'base' || tag === 'link'))) { return ɵɵsanitizeResourceUrl; } return ɵɵsanitizeUrl; } /** * Sanitizes URL, selecting sanitizer function based on tag and property names. * * This function is used in case we can't define security context at compile time, when only prop * name is available. This happens when we generate host bindings for Directives/Components. The * host element is unknown at compile time, so we defer calculation of specific sanitizer to * runtime. * * \@publicApi * @param {?} unsafeUrl untrusted `url`, typically from the user. * @param {?} tag target element tag name. * @param {?} prop name of the property that contains the value. * @return {?} `url` string which is safe to bind. * */ export function ɵɵsanitizeUrlOrResourceUrl(unsafeUrl, tag, prop) { return getUrlSanitizer(tag, prop)(unsafeUrl); } /** * The default style sanitizer will handle sanitization for style properties by * sanitizing any CSS property that can include a `url` value (usually image-based properties) * * \@publicApi * @type {?} */ export const ɵɵdefaultStyleSanitizer = ((/** @type {?} */ ((/** * @param {?} prop * @param {?} value * @param {?=} mode * @return {?} */ function (prop, value, mode) { if (value === undefined && mode === undefined) { // This is a workaround for the fact that `StyleSanitizeFn` should not exist once PR#34480 // lands. For now the `StyleSanitizeFn` and should act like `(value: any) => string` as a // work around. return ɵɵsanitizeStyle(prop); } mode = mode || 3 /* ValidateAndSanitize */; /** @type {?} */ let doSanitizeValue = true; if (mode & 1 /* ValidateProperty */) { doSanitizeValue = stylePropNeedsSanitization(prop); } if (mode & 2 /* SanitizeOnly */) { return doSanitizeValue ? ɵɵsanitizeStyle(value) : unwrapSafeValue(value); } else { return doSanitizeValue; } })))); /** * @param {?} prop * @return {?} */ export function stylePropNeedsSanitization(prop) { return prop === 'background-image' || prop === 'backgroundImage' || prop === 'background' || prop === 'border-image' || prop === 'borderImage' || prop === 'border-image-source' || prop === 'borderImageSource' || prop === 'filter' || prop === 'list-style' || prop === 'listStyle' || prop === 'list-style-image' || prop === 'listStyleImage' || prop === 'clip-path' || prop === 'clipPath'; } /** * @param {?} name * @return {?} */ export function validateAgainstEventProperties(name) { if (name.toLowerCase().startsWith('on')) { /** @type {?} */ const msg = `Binding to event property '${name}' is disallowed for security reasons, ` + `please use (${name.slice(2)})=...` + `\nIf '${name}' is a directive input, make sure the directive is imported by the` + ` current module.`; throw new Error(msg); } } /** * @param {?} name * @return {?} */ export function validateAgainstEventAttributes(name) { if (name.toLowerCase().startsWith('on')) { /** @type {?} */ const msg = `Binding to event attribute '${name}' is disallowed for security reasons, ` + `please use (${name.slice(2)})=...`; throw new Error(msg); } } /** * @return {?} */ function getSanitizer() { /** @type {?} */ const lView = getLView(); return lView && lView[SANITIZER]; } //# sourceMappingURL=data:application/json;base64,{"version":3,"file":"sanitization.js","sourceRoot":"","sources":["../../../../../../../packages/core/src/sanitization/sanitization.ts"],"names":[],"mappings":";;;;;;;;;;;;AAQA,OAAO,EAAC,WAAW,EAAC,MAAM,gCAAgC,CAAC;AAC3D,OAAO,EAAC,SAAS,EAAC,MAAM,4BAA4B,CAAC;AACrD,OAAO,EAAC,QAAQ,EAAC,MAAM,kBAAkB,CAAC;AAC1C,OAAO,EAAC,eAAe,EAAC,MAAM,4BAA4B,CAAC;AAE3D,OAAO,EAAC,+BAA+B,EAAc,eAAe,EAAC,MAAM,UAAU,CAAC;AACtF,OAAO,EAAC,aAAa,IAAI,aAAa,EAAC,MAAM,kBAAkB,CAAC;AAEhE,OAAO,EAAC,eAAe,EAAC,MAAM,YAAY,CAAC;AAC3C,OAAO,EAAC,cAAc,EAAqC,MAAM,mBAAmB,CAAC;AACrF,OAAO,EAAC,YAAY,IAAI,YAAY,EAAC,MAAM,iBAAiB,CAAC;;;;;;;;;;;;;;;;AAmB7D,MAAM,UAAU,cAAc,CAAC,UAAe;;UACtC,SAAS,GAAG,YAAY,EAAE;IAChC,IAAI,SAAS,EAAE;QACb,OAAO,SAAS,CAAC,QAAQ,CAAC,eAAe,CAAC,IAAI,EAAE,UAAU,CAAC,IAAI,EAAE,CAAC;KACnE;IACD,IAAI,+BAA+B,CAAC,UAAU,oBAAkB,EAAE;QAChE,OAAO,eAAe,CAAC,UAAU,CAAC,CAAC;KACpC;IACD,OAAO,aAAa,CAAC,WAAW,EAAE,EAAE,eAAe,CAAC,UAAU,CAAC,CAAC,CAAC;AACnE,CAAC;;;;;;;;;;;;;;;;AAiBD,MAAM,UAAU,eAAe,CAAC,WAAgB;;UACxC,SAAS,GAAG,YAAY,EAAE;IAChC,IAAI,SAAS,EAAE;QACb,OAAO,SAAS,CAAC,QAAQ,CAAC,eAAe,CAAC,KAAK,EAAE,WAAW,CAAC,IAAI,EAAE,CAAC;KACrE;IACD,IAAI,+BAA+B,CAAC,WAAW,sBAAmB,EAAE;QAClE,OAAO,eAAe,CAAC,WAAW,CAAC,CAAC;KACrC;IACD,OAAO,cAAc,CAAC,eAAe,CAAC,WAAW,CAAC,CAAC,CAAC;AACtD,CAAC;;;;;;;;;;;;;;;;;AAkBD,MAAM,UAAU,aAAa,CAAC,SAAc;;UACpC,SAAS,GAAG,YAAY,EAAE;IAChC,IAAI,SAAS,EAAE;QACb,OAAO,SAAS,CAAC,QAAQ,CAAC,eAAe,CAAC,GAAG,EAAE,SAAS,CAAC,IAAI,EAAE,CAAC;KACjE;IACD,IAAI,+BAA+B,CAAC,SAAS,kBAAiB,EAAE;QAC9D,OAAO,eAAe,CAAC,SAAS,CAAC,CAAC;KACnC;IACD,OAAO,YAAY,CAAC,eAAe,CAAC,SAAS,CAAC,CAAC,CAAC;AAClD,CAAC;;;;;;;;;;;;AAaD,MAAM,UAAU,qBAAqB,CAAC,iBAAsB;;UACpD,SAAS,GAAG,YAAY,EAAE;IAChC,IAAI,SAAS,EAAE;QACb,OAAO,SAAS,CAAC,QAAQ,CAAC,eAAe,CAAC,YAAY,EAAE,iBAAiB,CAAC,IAAI,EAAE,CAAC;KAClF;IACD,IAAI,+BAA+B,CAAC,iBAAiB,kCAAyB,EAAE;QAC9E,OAAO,eAAe,CAAC,iBAAiB,CAAC,CAAC;KAC3C;IACD,MAAM,IAAI,KAAK,CAAC,+EAA+E,CAAC,CAAC;AACnG,CAAC;;;;;;;;;;;;;AAcD,MAAM,UAAU,gBAAgB,CAAC,YAAiB;;UAC1C,SAAS,GAAG,YAAY,EAAE;IAChC,IAAI,SAAS,EAAE;QACb,OAAO,SAAS,CAAC,QAAQ,CAAC,eAAe,CAAC,MAAM,EAAE,YAAY,CAAC,IAAI,EAAE,CAAC;KACvE;IACD,IAAI,+BAA+B,CAAC,YAAY,wBAAoB,EAAE;QACpE,OAAO,eAAe,CAAC,YAAY,CAAC,CAAC;KACtC;IACD,MAAM,IAAI,KAAK,CAAC,uCAAuC,CAAC,CAAC;AAC3D,CAAC;;;;;;;;;;;AASD,MAAM,UAAU,eAAe,CAAC,GAAW,EAAE,IAAY;IACvD,IAAI,CAAC,IAAI,KAAK,KAAK;QACd,CAAC,GAAG,KAAK,OAAO,IAAI,GAAG,KAAK,OAAO,IAAI,GAAG,KAAK,QAAQ,IAAI,GAAG,KAAK,OAAO;YACzE,GAAG,KAAK,QAAQ,CAAC,CAAC;QACpB,CAAC,IAAI,KAAK,MAAM,IAAI,CAAC,GAAG,KAAK,MAAM,IAAI,GAAG,KAAK,MAAM,CAAC,CAAC,EAAE;QAC3D,OAAO,qBAAqB,CAAC;KAC9B;IACD,OAAO,aAAa,CAAC;AACvB,CAAC;;;;;;;;;;;;;;;;AAiBD,MAAM,UAAU,0BAA0B,CAAC,SAAc,EAAE,GAAW,EAAE,IAAY;IAClF,OAAO,eAAe,CAAC,GAAG,EAAE,IAAI,CAAC,CAAC,SAAS,CAAC,CAAC;AAC/C,CAAC;;;;;;;;AAQD,MAAM,OAAO,uBAAuB,GAChC,CAAC;;;;;;AAAA,UAAS,IAAY,EAAE,KAAkB,EAAE,IAAwB;IAClE,IAAI,KAAK,KAAK,SAAS,IAAI,IAAI,KAAK,SAAS,EAAE;QAC7C,0FAA0F;QAC1F,yFAAyF;QACzF,eAAe;QACf,OAAO,eAAe,CAAC,IAAI,CAAC,CAAC;KAC9B;IACD,IAAI,GAAG,IAAI,+BAAyC,CAAC;;QACjD,eAAe,GAAG,IAAI;IAC1B,IAAI,IAAI,2BAAqC,EAAE;QAC7C,eAAe,GAAG,0BAA0B,CAAC,IAAI,CAAC,CAAC;KACpD;IAED,IAAI,IAAI,uBAAiC,EAAE;QACzC,OAAO,eAAe,CAAC,CAAC,CAAC,eAAe,CAAC,KAAK,CAAC,CAAC,CAAC,CAAC,eAAe,CAAC,KAAK,CAAC,CAAC;KAC1E;SAAM;QACL,OAAO,eAAe,CAAC;KACxB;AACH,CAAC,GAAmB,CAAC;;;;;AAEzB,MAAM,UAAU,0BAA0B,CAAC,IAAY;IACrD,OAAO,IAAI,KAAK,kBAAkB,IAAI,IAAI,KAAK,iBAAiB,IAAI,IAAI,KAAK,YAAY;QACrF,IAAI,KAAK,cAAc,IAAI,IAAI,KAAK,aAAa,IAAI,IAAI,KAAK,qBAAqB;QACnF,IAAI,KAAK,mBAAmB,IAAI,IAAI,KAAK,QAAQ,IAAI,IAAI,KAAK,YAAY;QAC1E,IAAI,KAAK,WAAW,IAAI,IAAI,KAAK,kBAAkB,IAAI,IAAI,KAAK,gBAAgB;QAChF,IAAI,KAAK,WAAW,IAAI,IAAI,KAAK,UAAU,CAAC;AAClD,CAAC;;;;;AAED,MAAM,UAAU,8BAA8B,CAAC,IAAY;IACzD,IAAI,IAAI,CAAC,WAAW,EAAE,CAAC,UAAU,CAAC,IAAI,CAAC,EAAE;;cACjC,GAAG,GAAG,8BAA8B,IAAI,wCAAwC;YAClF,eAAe,IAAI,CAAC,KAAK,CAAC,CAAC,CAAC,OAAO;YACnC,SAAS,IAAI,oEAAoE;YACjF,kBAAkB;QACtB,MAAM,IAAI,KAAK,CAAC,GAAG,CAAC,CAAC;KACtB;AACH,CAAC;;;;;AAED,MAAM,UAAU,8BAA8B,CAAC,IAAY;IACzD,IAAI,IAAI,CAAC,WAAW,EAAE,CAAC,UAAU,CAAC,IAAI,CAAC,EAAE;;cACjC,GAAG,GAAG,+BAA+B,IAAI,wCAAwC;YACnF,eAAe,IAAI,CAAC,KAAK,CAAC,CAAC,CAAC,OAAO;QACvC,MAAM,IAAI,KAAK,CAAC,GAAG,CAAC,CAAC;KACtB;AACH,CAAC;;;;AAED,SAAS,YAAY;;UACb,KAAK,GAAG,QAAQ,EAAE;IACxB,OAAO,KAAK,IAAI,KAAK,CAAC,SAAS,CAAC,CAAC;AACnC,CAAC","sourcesContent":["/**\n * @license\n * Copyright Google Inc. All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {getDocument} from '../render3/interfaces/document';\nimport {SANITIZER} from '../render3/interfaces/view';\nimport {getLView} from '../render3/state';\nimport {renderStringify} from '../render3/util/misc_utils';\n\nimport {allowSanitizationBypassAndThrow, BypassType, unwrapSafeValue} from './bypass';\nimport {_sanitizeHtml as _sanitizeHtml} from './html_sanitizer';\nimport {Sanitizer} from './sanitizer';\nimport {SecurityContext} from './security';\nimport {_sanitizeStyle, StyleSanitizeFn, StyleSanitizeMode} from './style_sanitizer';\nimport {_sanitizeUrl as _sanitizeUrl} from './url_sanitizer';\n\n\n\n/**\n * An `html` sanitizer which converts untrusted `html` **string** into trusted string by removing\n * dangerous content.\n *\n * This method parses the `html` and locates potentially dangerous content (such as urls and\n * javascript) and removes it.\n *\n * It is possible to mark a string as trusted by calling {@link bypassSanitizationTrustHtml}.\n *\n * @param unsafeHtml untrusted `html`, typically from the user.\n * @returns `html` string which is safe to display to user, because all of the dangerous javascript\n * and urls have been removed.\n *\n * @publicApi\n */\nexport function ɵɵsanitizeHtml(unsafeHtml: any): string {\n  const sanitizer = getSanitizer();\n  if (sanitizer) {\n    return sanitizer.sanitize(SecurityContext.HTML, unsafeHtml) || '';\n  }\n  if (allowSanitizationBypassAndThrow(unsafeHtml, BypassType.Html)) {\n    return unwrapSafeValue(unsafeHtml);\n  }\n  return _sanitizeHtml(getDocument(), renderStringify(unsafeHtml));\n}\n\n/**\n * A `style` sanitizer which converts untrusted `style` **string** into trusted string by removing\n * dangerous content.\n *\n * This method parses the `style` and locates potentially dangerous content (such as urls and\n * javascript) and removes it.\n *\n * It is possible to mark a string as trusted by calling {@link bypassSanitizationTrustStyle}.\n *\n * @param unsafeStyle untrusted `style`, typically from the user.\n * @returns `style` string which is safe to bind to the `style` properties, because all of the\n * dangerous javascript and urls have been removed.\n *\n * @publicApi\n */\nexport function ɵɵsanitizeStyle(unsafeStyle: any): string {\n  const sanitizer = getSanitizer();\n  if (sanitizer) {\n    return sanitizer.sanitize(SecurityContext.STYLE, unsafeStyle) || '';\n  }\n  if (allowSanitizationBypassAndThrow(unsafeStyle, BypassType.Style)) {\n    return unwrapSafeValue(unsafeStyle);\n  }\n  return _sanitizeStyle(renderStringify(unsafeStyle));\n}\n\n/**\n * A `url` sanitizer which converts untrusted `url` **string** into trusted string by removing\n * dangerous\n * content.\n *\n * This method parses the `url` and locates potentially dangerous content (such as javascript) and\n * removes it.\n *\n * It is possible to mark a string as trusted by calling {@link bypassSanitizationTrustUrl}.\n *\n * @param unsafeUrl untrusted `url`, typically from the user.\n * @returns `url` string which is safe to bind to the `src` properties such as `<img src>`, because\n * all of the dangerous javascript has been removed.\n *\n * @publicApi\n */\nexport function ɵɵsanitizeUrl(unsafeUrl: any): string {\n  const sanitizer = getSanitizer();\n  if (sanitizer) {\n    return sanitizer.sanitize(SecurityContext.URL, unsafeUrl) || '';\n  }\n  if (allowSanitizationBypassAndThrow(unsafeUrl, BypassType.Url)) {\n    return unwrapSafeValue(unsafeUrl);\n  }\n  return _sanitizeUrl(renderStringify(unsafeUrl));\n}\n\n/**\n * A `url` sanitizer which only lets trusted `url`s through.\n *\n * This passes only `url`s marked trusted by calling {@link bypassSanitizationTrustResourceUrl}.\n *\n * @param unsafeResourceUrl untrusted `url`, typically from the user.\n * @returns `url` string which is safe to bind to the `src` properties such as `<img src>`, because\n * only trusted `url`s have been allowed to pass.\n *\n * @publicApi\n */\nexport function ɵɵsanitizeResourceUrl(unsafeResourceUrl: any): string {\n  const sanitizer = getSanitizer();\n  if (sanitizer) {\n    return sanitizer.sanitize(SecurityContext.RESOURCE_URL, unsafeResourceUrl) || '';\n  }\n  if (allowSanitizationBypassAndThrow(unsafeResourceUrl, BypassType.ResourceUrl)) {\n    return unwrapSafeValue(unsafeResourceUrl);\n  }\n  throw new Error('unsafe value used in a resource URL context (see http://g.co/ng/security#xss)');\n}\n\n/**\n * A `script` sanitizer which only lets trusted javascript through.\n *\n * This passes only `script`s marked trusted by calling {@link\n * bypassSanitizationTrustScript}.\n *\n * @param unsafeScript untrusted `script`, typically from the user.\n * @returns `url` string which is safe to bind to the `<script>` element such as `<img src>`,\n * because only trusted `scripts` have been allowed to pass.\n *\n * @publicApi\n */\nexport function ɵɵsanitizeScript(unsafeScript: any): string {\n  const sanitizer = getSanitizer();\n  if (sanitizer) {\n    return sanitizer.sanitize(SecurityContext.SCRIPT, unsafeScript) || '';\n  }\n  if (allowSanitizationBypassAndThrow(unsafeScript, BypassType.Script)) {\n    return unwrapSafeValue(unsafeScript);\n  }\n  throw new Error('unsafe value used in a script context');\n}\n\n/**\n * Detects which sanitizer to use for URL property, based on tag name and prop name.\n *\n * The rules are based on the RESOURCE_URL context config from\n * `packages/compiler/src/schema/dom_security_schema.ts`.\n * If tag and prop names don't match Resource URL schema, use URL sanitizer.\n */\nexport function getUrlSanitizer(tag: string, prop: string) {\n  if ((prop === 'src' &&\n       (tag === 'embed' || tag === 'frame' || tag === 'iframe' || tag === 'media' ||\n        tag === 'script')) ||\n      (prop === 'href' && (tag === 'base' || tag === 'link'))) {\n    return ɵɵsanitizeResourceUrl;\n  }\n  return ɵɵsanitizeUrl;\n}\n\n/**\n * Sanitizes URL, selecting sanitizer function based on tag and property names.\n *\n * This function is used in case we can't define security context at compile time, when only prop\n * name is available. This happens when we generate host bindings for Directives/Components. The\n * host element is unknown at compile time, so we defer calculation of specific sanitizer to\n * runtime.\n *\n * @param unsafeUrl untrusted `url`, typically from the user.\n * @param tag target element tag name.\n * @param prop name of the property that contains the value.\n * @returns `url` string which is safe to bind.\n *\n * @publicApi\n */\nexport function ɵɵsanitizeUrlOrResourceUrl(unsafeUrl: any, tag: string, prop: string): any {\n  return getUrlSanitizer(tag, prop)(unsafeUrl);\n}\n\n/**\n * The default style sanitizer will handle sanitization for style properties by\n * sanitizing any CSS property that can include a `url` value (usually image-based properties)\n *\n * @publicApi\n */\nexport const ɵɵdefaultStyleSanitizer =\n    (function(prop: string, value: string|null, mode?: StyleSanitizeMode): string|boolean|null {\n      if (value === undefined && mode === undefined) {\n        // This is a workaround for the fact that `StyleSanitizeFn` should not exist once PR#34480\n        // lands. For now the `StyleSanitizeFn` and should act like `(value: any) => string` as a\n        // work around.\n        return ɵɵsanitizeStyle(prop);\n      }\n      mode = mode || StyleSanitizeMode.ValidateAndSanitize;\n      let doSanitizeValue = true;\n      if (mode & StyleSanitizeMode.ValidateProperty) {\n        doSanitizeValue = stylePropNeedsSanitization(prop);\n      }\n\n      if (mode & StyleSanitizeMode.SanitizeOnly) {\n        return doSanitizeValue ? ɵɵsanitizeStyle(value) : unwrapSafeValue(value);\n      } else {\n        return doSanitizeValue;\n      }\n    } as StyleSanitizeFn);\n\nexport function stylePropNeedsSanitization(prop: string): boolean {\n  return prop === 'background-image' || prop === 'backgroundImage' || prop === 'background' ||\n      prop === 'border-image' || prop === 'borderImage' || prop === 'border-image-source' ||\n      prop === 'borderImageSource' || prop === 'filter' || prop === 'list-style' ||\n      prop === 'listStyle' || prop === 'list-style-image' || prop === 'listStyleImage' ||\n      prop === 'clip-path' || prop === 'clipPath';\n}\n\nexport function validateAgainstEventProperties(name: string) {\n  if (name.toLowerCase().startsWith('on')) {\n    const msg = `Binding to event property '${name}' is disallowed for security reasons, ` +\n        `please use (${name.slice(2)})=...` +\n        `\\nIf '${name}' is a directive input, make sure the directive is imported by the` +\n        ` current module.`;\n    throw new Error(msg);\n  }\n}\n\nexport function validateAgainstEventAttributes(name: string) {\n  if (name.toLowerCase().startsWith('on')) {\n    const msg = `Binding to event attribute '${name}' is disallowed for security reasons, ` +\n        `please use (${name.slice(2)})=...`;\n    throw new Error(msg);\n  }\n}\n\nfunction getSanitizer(): Sanitizer|null {\n  const lView = getLView();\n  return lView && lView[SANITIZER];\n}\n"]}