diff --git a/src/HtmlUtils.tsx b/src/HtmlUtils.tsx index 9a37e76ca8..b518c43973 100644 --- a/src/HtmlUtils.tsx +++ b/src/HtmlUtils.tsx @@ -17,32 +17,25 @@ See the License for the specific language governing permissions and limitations under the License. */ -import React, { LegacyRef, ReactElement, ReactNode } from "react"; +import React, { LegacyRef, ReactNode } from "react"; import sanitizeHtml from "sanitize-html"; import classNames from "classnames"; import EMOJIBASE_REGEX from "emojibase-regex"; -import { merge } from "lodash"; import katex from "katex"; import { decode } from "html-entities"; import { IContent } from "matrix-js-sdk/src/matrix"; import { Optional } from "matrix-events-sdk"; -import _Linkify from "linkify-react"; import escapeHtml from "escape-html"; import GraphemeSplitter from "graphemer"; import { getEmojiFromUnicode } from "@matrix-org/emojibase-bindings"; -import { - _linkifyElement, - _linkifyString, - ELEMENT_URL_PATTERN, - options as linkifyMatrixOptions, -} from "./linkify-matrix"; import { IExtendedSanitizeOptions } from "./@types/sanitize-html"; import SettingsStore from "./settings/SettingsStore"; -import { tryTransformPermalinkToLocalHref } from "./utils/permalinks/Permalinks"; -import { mediaFromMxc } from "./customisations/Media"; import { stripHTMLReply, stripPlainReply } from "./utils/Reply"; import { PERMITTED_URL_SCHEMES } from "./utils/UrlUtils"; +import { sanitizeHtmlParams, transformTags } from "./Linkify"; + +export { Linkify, linkifyElement, linkifyAndSanitizeHtml } from "./Linkify"; // Anything outside the basic multilingual plane will be a surrogate pair const SURROGATE_PAIR_PATTERN = /([\ud800-\udbff])([\udc00-\udfff])/; @@ -58,10 +51,6 @@ const EMOJI_SEPARATOR_REGEX = /[\u200D\u200B\s]|\uFE0F/g; const BIGEMOJI_REGEX = new RegExp(`^(${EMOJIBASE_REGEX.source})+$`, "i"); -const COLOR_REGEX = /^#[0-9a-fA-F]{6}$/; - -const MEDIA_API_MXC_REGEX = /\/_matrix\/media\/r0\/(?:download|thumbnail)\/(.+?)\/(.+?)(?:[?/]|$)/; - /* * Return true if the given string contains emoji * Uses a much, much simpler regex than emojibase's so will give false @@ -120,182 +109,6 @@ export function isUrlPermitted(inputUrl: string): boolean { } } -const transformTags: IExtendedSanitizeOptions["transformTags"] = { - // custom to matrix - // add blank targets to all hyperlinks except vector URLs - "a": function (tagName: string, attribs: sanitizeHtml.Attributes) { - if (attribs.href) { - attribs.target = "_blank"; // by default - - const transformed = tryTransformPermalinkToLocalHref(attribs.href); // only used to check if it is a link that can be handled locally - if ( - transformed !== attribs.href || // it could be converted so handle locally symbols e.g. @user:server.tdl, matrix: and matrix.to - attribs.href.match(ELEMENT_URL_PATTERN) // for https links to Element domains - ) { - delete attribs.target; - } - } else { - // Delete the href attrib if it is falsy - delete attribs.href; - } - - attribs.rel = "noreferrer noopener"; // https://mathiasbynens.github.io/rel-noopener/ - return { tagName, attribs }; - }, - "img": function (tagName: string, attribs: sanitizeHtml.Attributes) { - let src = attribs.src; - // Strip out imgs that aren't `mxc` here instead of using allowedSchemesByTag - // because transformTags is used _before_ we filter by allowedSchemesByTag and - // we don't want to allow images with `https?` `src`s. - // We also drop inline images (as if they were not present at all) when the "show - // images" preference is disabled. Future work might expose some UI to reveal them - // like standalone image events have. - if (!src || !SettingsStore.getValue("showImages")) { - return { tagName, attribs: {} }; - } - - if (!src.startsWith("mxc://")) { - const match = MEDIA_API_MXC_REGEX.exec(src); - if (match) { - src = `mxc://${match[1]}/${match[2]}`; - } - } - - if (!src.startsWith("mxc://")) { - return { tagName, attribs: {} }; - } - - const requestedWidth = Number(attribs.width); - const requestedHeight = Number(attribs.height); - const width = Math.min(requestedWidth || 800, 800); - const height = Math.min(requestedHeight || 600, 600); - // specify width/height as max values instead of absolute ones to allow object-fit to do its thing - // we only allow our own styles for this tag so overwrite the attribute - attribs.style = `max-width: ${width}px; max-height: ${height}px;`; - if (requestedWidth) { - attribs.style += "width: 100%;"; - } - if (requestedHeight) { - attribs.style += "height: 100%;"; - } - - attribs.src = mediaFromMxc(src).getThumbnailOfSourceHttp(width, height)!; - return { tagName, attribs }; - }, - "code": function (tagName: string, attribs: sanitizeHtml.Attributes) { - if (typeof attribs.class !== "undefined") { - // Filter out all classes other than ones starting with language- for syntax highlighting. - const classes = attribs.class.split(/\s/).filter(function (cl) { - return cl.startsWith("language-") && !cl.startsWith("language-_"); - }); - attribs.class = classes.join(" "); - } - return { tagName, attribs }; - }, - // eslint-disable-next-line @typescript-eslint/naming-convention - "*": function (tagName: string, attribs: sanitizeHtml.Attributes) { - // Delete any style previously assigned, style is an allowedTag for font, span & img, - // because attributes are stripped after transforming. - // For img this is trusted as it is generated wholly within the img transformation method. - if (tagName !== "img") { - delete attribs.style; - } - - // Sanitise and transform data-mx-color and data-mx-bg-color to their CSS - // equivalents - const customCSSMapper: Record = { - "data-mx-color": "color", - "data-mx-bg-color": "background-color", - // $customAttributeKey: $cssAttributeKey - }; - - let style = ""; - Object.keys(customCSSMapper).forEach((customAttributeKey) => { - const cssAttributeKey = customCSSMapper[customAttributeKey]; - const customAttributeValue = attribs[customAttributeKey]; - if ( - customAttributeValue && - typeof customAttributeValue === "string" && - COLOR_REGEX.test(customAttributeValue) - ) { - style += cssAttributeKey + ":" + customAttributeValue + ";"; - delete attribs[customAttributeKey]; - } - }); - - if (style) { - attribs.style = style + (attribs.style || ""); - } - - return { tagName, attribs }; - }, -}; - -const sanitizeHtmlParams: IExtendedSanitizeOptions = { - allowedTags: [ - "font", // custom to matrix for IRC-style font coloring - "del", // for markdown - "h1", - "h2", - "h3", - "h4", - "h5", - "h6", - "blockquote", - "p", - "a", - "ul", - "ol", - "sup", - "sub", - "nl", - "li", - "b", - "i", - "u", - "strong", - "em", - "strike", - "code", - "hr", - "br", - "div", - "table", - "thead", - "caption", - "tbody", - "tr", - "th", - "td", - "pre", - "span", - "img", - "details", - "summary", - ], - allowedAttributes: { - // attribute sanitization happens after transformations, so we have to accept `style` for font, span & img - // but strip during the transformation. - // custom ones first: - font: ["color", "data-mx-bg-color", "data-mx-color", "style"], // custom to matrix - span: ["data-mx-maths", "data-mx-bg-color", "data-mx-color", "data-mx-spoiler", "style"], // custom to matrix - div: ["data-mx-maths"], - a: ["href", "name", "target", "rel"], // remote target: custom to matrix - // img tags also accept width/height, we just map those to max-width & max-height during transformation - img: ["src", "alt", "title", "style"], - ol: ["start"], - code: ["class"], // We don't actually allow all classes, we filter them in transformTags - }, - // Lots of these won't come up by default because we don't allow them - selfClosing: ["img", "br", "hr", "area", "base", "basefont", "input", "link", "meta"], - // URL schemes we permit - allowedSchemes: PERMITTED_URL_SCHEMES, - allowProtocolRelative: false, - transformTags, - // 50 levels deep "should be enough for anyone" - nestingLimit: 50, -}; - // this is the same as the above except with less rewriting const composerSanitizeHtmlParams: IExtendedSanitizeOptions = { ...sanitizeHtmlParams, @@ -657,48 +470,6 @@ export function topicToHtml( ); } -/* Wrapper around linkify-react merging in our default linkify options */ -export function Linkify({ as, options, children }: React.ComponentProps): ReactElement { - return ( - <_Linkify as={as} options={merge({}, linkifyMatrixOptions, options)}> - {children} - - ); -} - -/** - * Linkifies the given string. This is a wrapper around 'linkifyjs/string'. - * - * @param {string} str string to linkify - * @param {object} [options] Options for linkifyString. Default: linkifyMatrixOptions - * @returns {string} Linkified string - */ -export function linkifyString(str: string, options = linkifyMatrixOptions): string { - return _linkifyString(str, options); -} - -/** - * Linkifies the given DOM element. This is a wrapper around 'linkifyjs/element'. - * - * @param {object} element DOM element to linkify - * @param {object} [options] Options for linkifyElement. Default: linkifyMatrixOptions - * @returns {object} - */ -export function linkifyElement(element: HTMLElement, options = linkifyMatrixOptions): HTMLElement { - return _linkifyElement(element, options); -} - -/** - * Linkify the given string and sanitize the HTML afterwards. - * - * @param {string} dirtyHtml The HTML string to sanitize and linkify - * @param {object} [options] Options for linkifyString. Default: linkifyMatrixOptions - * @returns {string} - */ -export function linkifyAndSanitizeHtml(dirtyHtml: string, options = linkifyMatrixOptions): string { - return sanitizeHtml(linkifyString(dirtyHtml, options), sanitizeHtmlParams); -} - /** * Returns if a node is a block element or not. * Only takes html nodes into account that are allowed in matrix messages. diff --git a/src/Linkify.tsx b/src/Linkify.tsx new file mode 100644 index 0000000000..24a8a153c5 --- /dev/null +++ b/src/Linkify.tsx @@ -0,0 +1,253 @@ +/* +Copyright 2024 The Matrix.org Foundation C.I.C. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +import React, { ReactElement } from "react"; +import sanitizeHtml from "sanitize-html"; +import { merge } from "lodash"; +import _Linkify from "linkify-react"; + +import { + _linkifyElement, + _linkifyString, + ELEMENT_URL_PATTERN, + options as linkifyMatrixOptions, +} from "./linkify-matrix"; +import { IExtendedSanitizeOptions } from "./@types/sanitize-html"; +import SettingsStore from "./settings/SettingsStore"; +import { tryTransformPermalinkToLocalHref } from "./utils/permalinks/Permalinks"; +import { mediaFromMxc } from "./customisations/Media"; +import { PERMITTED_URL_SCHEMES } from "./utils/UrlUtils"; + +const COLOR_REGEX = /^#[0-9a-fA-F]{6}$/; +const MEDIA_API_MXC_REGEX = /\/_matrix\/media\/r0\/(?:download|thumbnail)\/(.+?)\/(.+?)(?:[?/]|$)/; + +export const transformTags: NonNullable = { + // custom to matrix + // add blank targets to all hyperlinks except vector URLs + "a": function (tagName: string, attribs: sanitizeHtml.Attributes) { + if (attribs.href) { + attribs.target = "_blank"; // by default + + const transformed = tryTransformPermalinkToLocalHref(attribs.href); // only used to check if it is a link that can be handled locally + if ( + transformed !== attribs.href || // it could be converted so handle locally symbols e.g. @user:server.tdl, matrix: and matrix.to + attribs.href.match(ELEMENT_URL_PATTERN) // for https links to Element domains + ) { + delete attribs.target; + } + } else { + // Delete the href attrib if it is falsy + delete attribs.href; + } + + attribs.rel = "noreferrer noopener"; // https://mathiasbynens.github.io/rel-noopener/ + return { tagName, attribs }; + }, + "img": function (tagName: string, attribs: sanitizeHtml.Attributes) { + let src = attribs.src; + // Strip out imgs that aren't `mxc` here instead of using allowedSchemesByTag + // because transformTags is used _before_ we filter by allowedSchemesByTag and + // we don't want to allow images with `https?` `src`s. + // We also drop inline images (as if they were not present at all) when the "show + // images" preference is disabled. Future work might expose some UI to reveal them + // like standalone image events have. + if (!src || !SettingsStore.getValue("showImages")) { + return { tagName, attribs: {} }; + } + + if (!src.startsWith("mxc://")) { + const match = MEDIA_API_MXC_REGEX.exec(src); + if (match) { + src = `mxc://${match[1]}/${match[2]}`; + } + } + + if (!src.startsWith("mxc://")) { + return { tagName, attribs: {} }; + } + + const requestedWidth = Number(attribs.width); + const requestedHeight = Number(attribs.height); + const width = Math.min(requestedWidth || 800, 800); + const height = Math.min(requestedHeight || 600, 600); + // specify width/height as max values instead of absolute ones to allow object-fit to do its thing + // we only allow our own styles for this tag so overwrite the attribute + attribs.style = `max-width: ${width}px; max-height: ${height}px;`; + if (requestedWidth) { + attribs.style += "width: 100%;"; + } + if (requestedHeight) { + attribs.style += "height: 100%;"; + } + + attribs.src = mediaFromMxc(src).getThumbnailOfSourceHttp(width, height)!; + return { tagName, attribs }; + }, + "code": function (tagName: string, attribs: sanitizeHtml.Attributes) { + if (typeof attribs.class !== "undefined") { + // Filter out all classes other than ones starting with language- for syntax highlighting. + const classes = attribs.class.split(/\s/).filter(function (cl) { + return cl.startsWith("language-") && !cl.startsWith("language-_"); + }); + attribs.class = classes.join(" "); + } + return { tagName, attribs }; + }, + // eslint-disable-next-line @typescript-eslint/naming-convention + "*": function (tagName: string, attribs: sanitizeHtml.Attributes) { + // Delete any style previously assigned, style is an allowedTag for font, span & img, + // because attributes are stripped after transforming. + // For img this is trusted as it is generated wholly within the img transformation method. + if (tagName !== "img") { + delete attribs.style; + } + + // Sanitise and transform data-mx-color and data-mx-bg-color to their CSS + // equivalents + const customCSSMapper: Record = { + "data-mx-color": "color", + "data-mx-bg-color": "background-color", + // $customAttributeKey: $cssAttributeKey + }; + + let style = ""; + Object.keys(customCSSMapper).forEach((customAttributeKey) => { + const cssAttributeKey = customCSSMapper[customAttributeKey]; + const customAttributeValue = attribs[customAttributeKey]; + if ( + customAttributeValue && + typeof customAttributeValue === "string" && + COLOR_REGEX.test(customAttributeValue) + ) { + style += cssAttributeKey + ":" + customAttributeValue + ";"; + delete attribs[customAttributeKey]; + } + }); + + if (style) { + attribs.style = style + (attribs.style || ""); + } + + return { tagName, attribs }; + }, +}; + +export const sanitizeHtmlParams: IExtendedSanitizeOptions = { + allowedTags: [ + "font", // custom to matrix for IRC-style font coloring + "del", // for markdown + "h1", + "h2", + "h3", + "h4", + "h5", + "h6", + "blockquote", + "p", + "a", + "ul", + "ol", + "sup", + "sub", + "nl", + "li", + "b", + "i", + "u", + "strong", + "em", + "strike", + "code", + "hr", + "br", + "div", + "table", + "thead", + "caption", + "tbody", + "tr", + "th", + "td", + "pre", + "span", + "img", + "details", + "summary", + ], + allowedAttributes: { + // attribute sanitization happens after transformations, so we have to accept `style` for font, span & img + // but strip during the transformation. + // custom ones first: + font: ["color", "data-mx-bg-color", "data-mx-color", "style"], // custom to matrix + span: ["data-mx-maths", "data-mx-bg-color", "data-mx-color", "data-mx-spoiler", "style"], // custom to matrix + div: ["data-mx-maths"], + a: ["href", "name", "target", "rel"], // remote target: custom to matrix + // img tags also accept width/height, we just map those to max-width & max-height during transformation + img: ["src", "alt", "title", "style"], + ol: ["start"], + code: ["class"], // We don't actually allow all classes, we filter them in transformTags + }, + // Lots of these won't come up by default because we don't allow them + selfClosing: ["img", "br", "hr", "area", "base", "basefont", "input", "link", "meta"], + // URL schemes we permit + allowedSchemes: PERMITTED_URL_SCHEMES, + allowProtocolRelative: false, + transformTags, + // 50 levels deep "should be enough for anyone" + nestingLimit: 50, +}; + +/* Wrapper around linkify-react merging in our default linkify options */ +export function Linkify({ as, options, children }: React.ComponentProps): ReactElement { + return ( + <_Linkify as={as} options={merge({}, linkifyMatrixOptions, options)}> + {children} + + ); +} + +/** + * Linkifies the given string. This is a wrapper around 'linkifyjs/string'. + * + * @param {string} str string to linkify + * @param {object} [options] Options for linkifyString. Default: linkifyMatrixOptions + * @returns {string} Linkified string + */ +export function linkifyString(str: string, options = linkifyMatrixOptions): string { + return _linkifyString(str, options); +} + +/** + * Linkifies the given DOM element. This is a wrapper around 'linkifyjs/element'. + * + * @param {object} element DOM element to linkify + * @param {object} [options] Options for linkifyElement. Default: linkifyMatrixOptions + * @returns {object} + */ +export function linkifyElement(element: HTMLElement, options = linkifyMatrixOptions): HTMLElement { + return _linkifyElement(element, options); +} + +/** + * Linkify the given string and sanitize the HTML afterwards. + * + * @param {string} dirtyHtml The HTML string to sanitize and linkify + * @param {object} [options] Options for linkifyString. Default: linkifyMatrixOptions + * @returns {string} + */ +export function linkifyAndSanitizeHtml(dirtyHtml: string, options = linkifyMatrixOptions): string { + return sanitizeHtml(linkifyString(dirtyHtml, options), sanitizeHtmlParams); +} diff --git a/src/components/views/dialogs/InteractiveAuthDialog.tsx b/src/components/views/dialogs/InteractiveAuthDialog.tsx index f16da83cc0..c6e3dd2037 100644 --- a/src/components/views/dialogs/InteractiveAuthDialog.tsx +++ b/src/components/views/dialogs/InteractiveAuthDialog.tsx @@ -29,6 +29,7 @@ import InteractiveAuth, { } from "../../structures/InteractiveAuth"; import { ContinueKind, SSOAuthEntry } from "../auth/InteractiveAuthEntryComponents"; import BaseDialog from "./BaseDialog"; +import { Linkify } from "../../../Linkify"; type DialogAesthetics = Partial<{ [x in AuthType]: { @@ -168,7 +169,9 @@ export default class InteractiveAuthDialog extends React.Component -
{this.state.authError.message || this.state.authError.toString()}
+ +
{this.state.authError.message || this.state.authError.toString()}
+
{_t("action|dismiss")}