add hw2

node_modules/@braintree/sanitize-url/.eslintignore

@@ -0,0 +1,2 @@
+dist
+coverage

node_modules/@braintree/sanitize-url/.eslintrc

@@ -0,0 +1,6 @@
+{
+  "extends": "braintree/client",
+  "rules": {
+    "no-control-regex": 0
+  }
+}

node_modules/@braintree/sanitize-url/.github/CODEOWNERS

@@ -0,0 +1 @@
+* @braintree/team-sdk-js

node_modules/@braintree/sanitize-url/.github/workflows/ci.yml

@@ -0,0 +1,17 @@
+name: "Unit Tests"
+
+on: [push]
+
+jobs:
+  build:
+    name: "Unit Tests on Ubuntu"
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: "18.x"
+      - run: npm install
+      - run: npm test

node_modules/@braintree/sanitize-url/.nvmrc

@@ -0,0 +1 @@
+v18

node_modules/@braintree/sanitize-url/.prettierignore

@@ -0,0 +1,3 @@
+*-lock.json
+dist
+coverage

node_modules/@braintree/sanitize-url/CHANGELOG.md

@@ -0,0 +1,142 @@
+# CHANGELOG
+
+## 7.1.1
+
+- DevDependency Changes
+
+  - happy-dom to 15.11.6
+
+- Update (sub-)dependencies
+  - cross-spawn to 7.0.6
+  - micromatch to 4.0.8
+  - vite to 4.5.5
+
+## 7.1.0
+
+- Updated to handle back-slashes
+
+## 7.0.4
+
+- Updates get-func-name to 2.0.2
+
+## 7.0.3
+
+- Dependencies
+  - Update braces to 3.0.3
+
+## 7.0.2
+
+- Improve sanitization of whitespace escapes
+
+## 7.0.1
+
+- Improve sanitization of HTML entities
+
+## 7.0.0
+
+- Move constant declarations from index file to `constants.ts` file
+- Update to node v18
+
+- Dev Dependency Updates
+  - Update to TypeScript 5
+  - Other minor dependency updates
+
+## 6.0.4
+
+- Add additional null byte sanitization prior to html decoding (#48)
+
+## 6.0.3
+
+- Add null check to beginning of `sanitizeUrl` function ([#54](https://github.com/braintree/sanitize-url/issues/54))
+
+## 6.0.2
+
+- Fix issue where urls in the form `https://example.com

/something` were not properly sanitized
+
+## 6.0.1
+
+- Fix issue where urls in the form `javascript:alert('xss');` were not properly sanitized
+- Fix issue where urls in the form `javasc	ript:alert('XSS');` were not properly sanitized
+
+## 6.0.0
+
+**Breaking Changes**
+
+- Decode HTML characters automatically that would result in an XSS vulnerability when rendering links via a server rendered HTML file
+
+```js
+// decodes to javacript:alert('XSS')
+const vulnerableUrl =
+  "&#0000106&#0000097&#0000118&#0000097&#0000115&#0000099&#0000114&#0000105&#0000112&#0000116&#0000058&#0000097&#0000108&#0000101&#0000114&#0000116&#0000040&#0000039&#0000088&#0000083&#0000083&#0000039&#0000041";
+
+sanitizeUrl(vulnerableUrl); // 'about:blank'
+
+const okUrl = "https://example.com/" + vulnerableUrl;
+
+// since the javascript bit is in the path instead of the protocol
+// this is successfully sanitized
+sanitizeUrl(okUrl); // 'https://example.com/javascript:alert('XSS');
+```
+
+## 5.0.2
+
+- Fix issue where certain invisible white space characters were not being sanitized (#35)
+
+## 5.0.1
+
+- Fix issue where certain safe characters were being filtered out (#31 thanks @akirchmyer)
+
+## 5.0.0
+
+_Breaking Changes_
+
+- Sanitize vbscript urls (thanks @vicnicius)
+
+## 4.1.1
+
+- Fixup path to type declaration (closes #25)
+
+## 4.1.0
+
+- Add typescript types
+
+## 4.0.1
+
+- Fix issue where urls with accented characters were incorrectly sanitized
+
+## 4.0.0
+
+_Breaking Changes_
+
+- Protocol-less urls (ie: www.example.com) will be sanitised and passed on instead of sending out `about:blank` (Thanks @chawes13 #18)
+
+## 3.1.0
+
+- Trim whitespace from urls
+
+## 3.0.0
+
+_breaking changes_
+
+- Replace blank strings with about:blank
+- Replace null values with about:blank
+
+## 2.1.0
+
+- Allow relative urls to be sanitized
+
+## 2.0.2
+
+- Sanitize malicious URLs that begin with `\s`
+
+## 2.0.1
+
+- Sanitize malicious URLs that begin with %20
+
+## 2.0.0
+
+- sanitize data: urls
+
+## 1.0.0
+
+- sanitize javascript: urls

node_modules/@braintree/sanitize-url/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2017 Braintree
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

node_modules/@braintree/sanitize-url/README.md

@@ -0,0 +1,39 @@
+# sanitize-url
+
+## Installation
+
+```sh
+npm install -S @braintree/sanitize-url
+```
+
+## Usage
+
+```js
+var sanitizeUrl = require("@braintree/sanitize-url").sanitizeUrl;
+
+sanitizeUrl("https://example.com"); // 'https://example.com'
+sanitizeUrl("http://example.com"); // 'http://example.com'
+sanitizeUrl("www.example.com"); // 'www.example.com'
+sanitizeUrl("mailto:hello@example.com"); // 'mailto:hello@example.com'
+sanitizeUrl(
+  "https&#0000058//example.com"
+); // https://example.com
+
+sanitizeUrl("javascript:alert(document.domain)"); // 'about:blank'
+sanitizeUrl("jAvasCrIPT:alert(document.domain)"); // 'about:blank'
+sanitizeUrl(decodeURIComponent("JaVaScRiP%0at:alert(document.domain)")); // 'about:blank'
+// HTML encoded javascript:alert('XSS')
+sanitizeUrl(
+  "&#0000106&#0000097&#0000118&#0000097&#0000115&#0000099&#0000114&#0000105&#0000112&#0000116&#0000058&#0000097&#0000108&#0000101&#0000114&#0000116&#0000040&#0000039&#0000088&#0000083&#0000083&#0000039&#0000041"
+); // 'about:blank'
+```
+
+## Testing
+
+This library uses [Vitest](https://vitest.dev/). All testing dependencies
+will be installed upon `npm install` and the test suite can be executed with
+`npm test`. Running the test suite will also run lint checks upon exiting.
+
+    npm test
+
+To generate a coverage report, use `npm run coverage`.

node_modules/@braintree/sanitize-url/dist/constants.d.ts

@@ -0,0 +1,8 @@
+export declare const invalidProtocolRegex: RegExp;
+export declare const htmlEntitiesRegex: RegExp;
+export declare const htmlCtrlEntityRegex: RegExp;
+export declare const ctrlCharactersRegex: RegExp;
+export declare const urlSchemeRegex: RegExp;
+export declare const whitespaceEscapeCharsRegex: RegExp;
+export declare const relativeFirstCharacters: string[];
+export declare const BLANK_URL = "about:blank";

node_modules/@braintree/sanitize-url/dist/constants.js

@@ -0,0 +1,11 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.BLANK_URL = exports.relativeFirstCharacters = exports.whitespaceEscapeCharsRegex = exports.urlSchemeRegex = exports.ctrlCharactersRegex = exports.htmlCtrlEntityRegex = exports.htmlEntitiesRegex = exports.invalidProtocolRegex = void 0;
+exports.invalidProtocolRegex = /^([^\w]*)(javascript|data|vbscript)/im;
+exports.htmlEntitiesRegex = /&#(\w+)(^\w|;)?/g;
+exports.htmlCtrlEntityRegex = /&(newline|tab);/gi;
+exports.ctrlCharactersRegex = /[\u0000-\u001F\u007F-\u009F\u2000-\u200D\uFEFF]/gim;
+exports.urlSchemeRegex = /^.+(:|:)/gim;
+exports.whitespaceEscapeCharsRegex = /(\\|%5[cC])((%(6[eE]|72|74))|[nrt])/g;
+exports.relativeFirstCharacters = [".", "/"];
+exports.BLANK_URL = "about:blank";

node_modules/@braintree/sanitize-url/dist/index.d.ts

@@ -0,0 +1 @@
+export declare function sanitizeUrl(url?: string): string;

node_modules/@braintree/sanitize-url/dist/index.js

@@ -0,0 +1,81 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.sanitizeUrl = void 0;
+var constants_1 = require("./constants");
+function isRelativeUrlWithoutProtocol(url) {
+    return constants_1.relativeFirstCharacters.indexOf(url[0]) > -1;
+}
+function decodeHtmlCharacters(str) {
+    var removedNullByte = str.replace(constants_1.ctrlCharactersRegex, "");
+    return removedNullByte.replace(constants_1.htmlEntitiesRegex, function (match, dec) {
+        return String.fromCharCode(dec);
+    });
+}
+function isValidUrl(url) {
+    return URL.canParse(url);
+}
+function decodeURI(uri) {
+    try {
+        return decodeURIComponent(uri);
+    }
+    catch (e) {
+        // Ignoring error
+        // It is possible that the URI contains a `%` not associated
+        // with URI/URL-encoding.
+        return uri;
+    }
+}
+function sanitizeUrl(url) {
+    if (!url) {
+        return constants_1.BLANK_URL;
+    }
+    var charsToDecode;
+    var decodedUrl = decodeURI(url.trim());
+    do {
+        decodedUrl = decodeHtmlCharacters(decodedUrl)
+            .replace(constants_1.htmlCtrlEntityRegex, "")
+            .replace(constants_1.ctrlCharactersRegex, "")
+            .replace(constants_1.whitespaceEscapeCharsRegex, "")
+            .trim();
+        decodedUrl = decodeURI(decodedUrl);
+        charsToDecode =
+            decodedUrl.match(constants_1.ctrlCharactersRegex) ||
+                decodedUrl.match(constants_1.htmlEntitiesRegex) ||
+                decodedUrl.match(constants_1.htmlCtrlEntityRegex) ||
+                decodedUrl.match(constants_1.whitespaceEscapeCharsRegex);
+    } while (charsToDecode && charsToDecode.length > 0);
+    var sanitizedUrl = decodedUrl;
+    if (!sanitizedUrl) {
+        return constants_1.BLANK_URL;
+    }
+    if (isRelativeUrlWithoutProtocol(sanitizedUrl)) {
+        return sanitizedUrl;
+    }
+    // Remove any leading whitespace before checking the URL scheme
+    var trimmedUrl = sanitizedUrl.trimStart();
+    var urlSchemeParseResults = trimmedUrl.match(constants_1.urlSchemeRegex);
+    if (!urlSchemeParseResults) {
+        return sanitizedUrl;
+    }
+    var urlScheme = urlSchemeParseResults[0].toLowerCase().trim();
+    if (constants_1.invalidProtocolRegex.test(urlScheme)) {
+        return constants_1.BLANK_URL;
+    }
+    var backSanitized = trimmedUrl.replace(/\\/g, "/");
+    // Handle special cases for mailto: and custom deep-link protocols
+    if (urlScheme === "mailto:" || urlScheme.includes("://")) {
+        return backSanitized;
+    }
+    // For http and https URLs, perform additional validation
+    if (urlScheme === "http:" || urlScheme === "https:") {
+        if (!isValidUrl(backSanitized)) {
+            return constants_1.BLANK_URL;
+        }
+        var url_1 = new URL(backSanitized);
+        url_1.protocol = url_1.protocol.toLowerCase();
+        url_1.hostname = url_1.hostname.toLowerCase();
+        return url_1.toString();
+    }
+    return backSanitized;
+}
+exports.sanitizeUrl = sanitizeUrl;

node_modules/@braintree/sanitize-url/package.json

@@ -0,0 +1,40 @@
+{
+  "name": "@braintree/sanitize-url",
+  "version": "7.1.1",
+  "description": "A url sanitizer",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "author": "",
+  "scripts": {
+    "prepublishOnly": "npm run build",
+    "prebuild": "prettier --write .",
+    "build": "tsc --declaration",
+    "lint": "eslint --ext js,ts .",
+    "posttest": "npm run lint",
+    "test": "vitest",
+    "coverage": "vitest run --coverage"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/braintree/sanitize-url.git"
+  },
+  "keywords": [],
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/braintree/sanitize-url/issues"
+  },
+  "homepage": "https://github.com/braintree/sanitize-url#readme",
+  "devDependencies": {
+    "@types/jest": "^29.4.0",
+    "@typescript-eslint/eslint-plugin": "^5.54.1",
+    "@vitest/coverage-v8": "^0.34.2",
+    "chai": "^4.3.7",
+    "eslint": "^8.36.0",
+    "eslint-config-braintree": "^6.0.0-typescript-prep-rc.2",
+    "eslint-plugin-prettier": "^4.2.1",
+    "happy-dom": "^15.11.6",
+    "prettier": "^2.8.4",
+    "typescript": "^5.1.6",
+    "vitest": "^0.34.2"
+  }
+}

node_modules/@braintree/sanitize-url/src/__tests__/index.test.ts

@@ -0,0 +1,261 @@
+/* eslint-disable no-script-url */
+import { sanitizeUrl } from "..";
+import { BLANK_URL } from "../constants";
+
+describe("sanitizeUrl", () => {
+  it("does not alter http URLs with alphanumeric characters", () => {
+    expect(sanitizeUrl("http://example.com/path/to:something")).toBe(
+      "http://example.com/path/to:something"
+    );
+  });
+
+  it("does not alter http URLs with ports with alphanumeric characters", () => {
+    expect(sanitizeUrl("http://example.com:4567/path/to:something")).toBe(
+      "http://example.com:4567/path/to:something"
+    );
+  });
+
+  it("does not alter https URLs with alphanumeric characters", () => {
+    expect(sanitizeUrl("https://example.com")).toBe("https://example.com/");
+  });
+
+  it("does not alter https URLs with ports with alphanumeric characters", () => {
+    expect(sanitizeUrl("https://example.com:4567/path/to:something")).toBe(
+      "https://example.com:4567/path/to:something"
+    );
+  });
+
+  it("does not alter relative-path reference URLs with alphanumeric characters", () => {
+    expect(sanitizeUrl("./path/to/my.json")).toBe("./path/to/my.json");
+  });
+
+  it("does not alter absolute-path reference URLs with alphanumeric characters", () => {
+    expect(sanitizeUrl("/path/to/my.json")).toBe("/path/to/my.json");
+  });
+
+  it("does not alter protocol-less network-path URLs with alphanumeric characters", () => {
+    expect(sanitizeUrl("//google.com/robots.txt")).toBe(
+      "//google.com/robots.txt"
+    );
+  });
+
+  it("does not alter protocol-less URLs with alphanumeric characters", () => {
+    expect(sanitizeUrl("www.example.com")).toBe("www.example.com");
+  });
+
+  it("does not alter deep-link urls with alphanumeric characters", () => {
+    expect(sanitizeUrl("com.braintreepayments.demo://example")).toBe(
+      "com.braintreepayments.demo://example"
+    );
+  });
+
+  it("does not alter mailto urls with alphanumeric characters", () => {
+    expect(sanitizeUrl("mailto:test@example.com?subject=hello+world")).toBe(
+      "mailto:test@example.com?subject=hello+world"
+    );
+  });
+
+  it("does not alter urls with accented characters", () => {
+    expect(sanitizeUrl("www.example.com/with-áccêntš")).toBe(
+      "www.example.com/with-áccêntš"
+    );
+  });
+
+  it("does not strip harmless unicode characters", () => {
+    expect(sanitizeUrl("www.example.com/лот.рфшишкиü–")).toBe(
+      "www.example.com/лот.рфшишкиü–"
+    );
+  });
+
+  it("strips out ctrl chars", () => {
+    expect(
+      sanitizeUrl("www.example.com/\u200D\u0000\u001F\x00\x1F\uFEFFfoo")
+    ).toBe("www.example.com/foo");
+  });
+
+  it(`replaces blank urls with ${BLANK_URL}`, () => {
+    expect(sanitizeUrl("")).toBe(BLANK_URL);
+  });
+
+  it(`replaces null values with ${BLANK_URL}`, () => {
+    // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+    // @ts-ignore
+    expect(sanitizeUrl(null)).toBe(BLANK_URL);
+  });
+
+  it(`replaces undefined values with ${BLANK_URL}`, () => {
+    expect(sanitizeUrl()).toBe(BLANK_URL);
+  });
+
+  it("removes whitespace from urls", () => {
+    expect(sanitizeUrl("   http://example.com/path/to:something    ")).toBe(
+      "http://example.com/path/to:something"
+    );
+  });
+
+  it("removes newline entities from urls", () => {
+    expect(sanitizeUrl("https://example.com

/something")).toBe(
+      "https://example.com/something"
+    );
+  });
+
+  it("decodes html entities", () => {
+    // all these decode to javascript:alert('xss');
+    const attackVectors = [
+      "&#0000106&#0000097&#0000118&#0000097&#0000115&#0000099&#0000114&#0000105&#0000112&#0000116&#0000058&#0000097&#0000108&#0000101&#0000114&#0000116&#0000040&#0000039&#0000088&#0000083&#0000083&#0000039&#0000041",
+      "javascript:alert('XSS')",
+      "&#x6A&#x61&#x76&#x61&#x73&#x63&#x72&#x69&#x70&#x74&#x3A&#x61&#x6C&#x65&#x72&#x74&#x28&#x27&#x58&#x53&#x53&#x27&#x29",
+      "jav	ascript:alert('XSS');",
+      "  javascript:alert('XSS');",
+      "javasc	ript: alert('XSS');",
+      "javasc&#\u0000x09;ript:alert(1)",
+      "java&&#78&#59;ewLine&newline&#59;&#59;script:alert('XSS')",
+      "java&NewLine&newline;;script:alert('XSS')",
+    ];
+
+    attackVectors.forEach((vector) => {
+      expect(sanitizeUrl(vector)).toBe(BLANK_URL);
+    });
+
+    // https://example.com/javascript:alert('XSS')
+    // since the javascript is the url path, and not the protocol,
+    // this url is technically sanitized
+    expect(
+      sanitizeUrl(
+        "https&#0000058//example.com/&#0000106&#0000097&#0000118&#0000097&#0000115&#0000099&#0000114&#0000105&#0000112&#0000116&#0000058&#0000097&#0000108&#0000101&#0000114&#0000116&#0000040&#0000039&#0000088&#0000083&#0000083&#0000039&#0000041"
+      )
+    ).toBe("https://example.com/javascript:alert('XSS')");
+  });
+
+  it("removes whitespace escape sequences", () => {
+    const attackVectors = [
+      "javascri\npt:alert('xss')",
+      "javascri\rpt:alert('xss')",
+      "javascri\tpt:alert('xss')",
+      "javascrip\\%74t:alert('XSS')",
+      "javascrip%5c%72t:alert()",
+      "javascrip%5Ctt:alert()",
+      "javascrip%255Ctt:alert()",
+      "javascrip%25%35Ctt:alert()",
+      "javascrip%25%35%43tt:alert()",
+      "javascrip%25%32%35%25%33%35%25%34%33rt:alert()",
+      "javascrip%255Crt:alert('%25xss')",
+    ];
+
+    attackVectors.forEach((vector) => {
+      expect(sanitizeUrl(vector)).toBe(BLANK_URL);
+    });
+  });
+
+  it("backslash prefixed attack vectors", () => {
+    const attackVectors = [
+      "\fjavascript:alert()",
+      "\vjavascript:alert()",
+      "\tjavascript:alert()",
+      "\njavascript:alert()",
+      "\rjavascript:alert()",
+      "\u0000javascript:alert()",
+      "\u0001javascript:alert()",
+    ];
+
+    attackVectors.forEach((vector) => {
+      expect(sanitizeUrl(vector)).toBe(BLANK_URL);
+    });
+  });
+
+  it("reverses backslashes", () => {
+    const attack = "\\j\\av\\a\\s\\cript:alert()";
+
+    expect(sanitizeUrl(attack)).toBe("/j/av/a/s/cript:alert()");
+  });
+
+  describe("invalid protocols", () => {
+    describe.each(["javascript", "data", "vbscript"])("%s", (protocol) => {
+      it(`replaces ${protocol} urls with ${BLANK_URL}`, () => {
+        expect(sanitizeUrl(`${protocol}:alert(document.domain)`)).toBe(
+          BLANK_URL
+        );
+      });
+
+      it(`allows ${protocol} urls that start with a letter prefix`, () => {
+        expect(sanitizeUrl(`not_${protocol}:alert(document.domain)`)).toBe(
+          `not_${protocol}:alert(document.domain)`
+        );
+      });
+
+      it(`disallows ${protocol} urls that start with non-\w characters as a suffix for the protocol`, () => {
+        expect(sanitizeUrl(`&!*${protocol}:alert(document.domain)`)).toBe(
+          BLANK_URL
+        );
+      });
+
+      it(`disallows ${protocol} urls that use : for the colon portion of the url`, () => {
+        expect(sanitizeUrl(`${protocol}:alert(document.domain)`)).toBe(
+          BLANK_URL
+        );
+        expect(sanitizeUrl(`${protocol}:alert(document.domain)`)).toBe(
+          BLANK_URL
+        );
+      });
+
+      it(`disregards capitalization for ${protocol} urls`, () => {
+        // upper case every other letter in protocol name
+        const mixedCapitalizationProtocol = protocol
+          .split("")
+          .map((character, index) => {
+            if (index % 2 === 0) {
+              return character.toUpperCase();
+            }
+            return character;
+          })
+          .join("");
+
+        expect(
+          sanitizeUrl(`${mixedCapitalizationProtocol}:alert(document.domain)`)
+        ).toBe(BLANK_URL);
+      });
+
+      it(`ignores invisible ctrl characters in ${protocol} urls`, () => {
+        const protocolWithControlCharacters = protocol
+          .split("")
+          .map((character, index) => {
+            if (index === 1) {
+              return character + "%EF%BB%BF%EF%BB%BF";
+            } else if (index === 2) {
+              return character + "%e2%80%8b";
+            }
+            return character;
+          })
+          .join("");
+
+        expect(
+          sanitizeUrl(
+            decodeURIComponent(
+              `${protocolWithControlCharacters}:alert(document.domain)`
+            )
+          )
+        ).toBe(BLANK_URL);
+      });
+
+      it(`replaces ${protocol} urls with ${BLANK_URL} when url begins with %20`, () => {
+        expect(
+          sanitizeUrl(
+            decodeURIComponent(`%20%20%20%20${protocol}:alert(document.domain)`)
+          )
+        ).toBe(BLANK_URL);
+      });
+
+      it(`replaces ${protocol} urls with ${BLANK_URL} when ${protocol} url begins with spaces`, () => {
+        expect(sanitizeUrl(`    ${protocol}:alert(document.domain)`)).toBe(
+          BLANK_URL
+        );
+      });
+
+      it(`does not replace ${protocol}: if it is not in the scheme of the URL`, () => {
+        expect(sanitizeUrl(`http://example.com#${protocol}:foo`)).toBe(
+          `http://example.com#${protocol}:foo`
+        );
+      });
+    });
+  });
+});

node_modules/@braintree/sanitize-url/src/constants.ts

@@ -0,0 +1,10 @@
+export const invalidProtocolRegex = /^([^\w]*)(javascript|data|vbscript)/im;
+export const htmlEntitiesRegex = /&#(\w+)(^\w|;)?/g;
+export const htmlCtrlEntityRegex = /&(newline|tab);/gi;
+export const ctrlCharactersRegex =
+  /[\u0000-\u001F\u007F-\u009F\u2000-\u200D\uFEFF]/gim;
+export const urlSchemeRegex = /^.+(:|:)/gim;
+export const whitespaceEscapeCharsRegex =
+  /(\\|%5[cC])((%(6[eE]|72|74))|[nrt])/g;
+export const relativeFirstCharacters = [".", "/"];
+export const BLANK_URL = "about:blank";

node_modules/@braintree/sanitize-url/src/index.ts

@@ -0,0 +1,107 @@
+import {
+  BLANK_URL,
+  ctrlCharactersRegex,
+  htmlCtrlEntityRegex,
+  htmlEntitiesRegex,
+  invalidProtocolRegex,
+  relativeFirstCharacters,
+  whitespaceEscapeCharsRegex,
+  urlSchemeRegex,
+} from "./constants";
+
+function isRelativeUrlWithoutProtocol(url: string): boolean {
+  return relativeFirstCharacters.indexOf(url[0]) > -1;
+}
+
+function decodeHtmlCharacters(str: string) {
+  const removedNullByte = str.replace(ctrlCharactersRegex, "");
+  return removedNullByte.replace(htmlEntitiesRegex, (match, dec) => {
+    return String.fromCharCode(dec);
+  });
+}
+
+function isValidUrl(url: string): boolean {
+  return URL.canParse(url);
+}
+
+function decodeURI(uri: string): string {
+  try {
+    return decodeURIComponent(uri);
+  } catch (e: unknown) {
+    // Ignoring error
+    // It is possible that the URI contains a `%` not associated
+    // with URI/URL-encoding.
+    return uri;
+  }
+}
+
+export function sanitizeUrl(url?: string): string {
+  if (!url) {
+    return BLANK_URL;
+  }
+
+  let charsToDecode;
+  let decodedUrl = decodeURI(url.trim());
+
+  do {
+    decodedUrl = decodeHtmlCharacters(decodedUrl)
+      .replace(htmlCtrlEntityRegex, "")
+      .replace(ctrlCharactersRegex, "")
+      .replace(whitespaceEscapeCharsRegex, "")
+      .trim();
+
+    decodedUrl = decodeURI(decodedUrl);
+
+    charsToDecode =
+      decodedUrl.match(ctrlCharactersRegex) ||
+      decodedUrl.match(htmlEntitiesRegex) ||
+      decodedUrl.match(htmlCtrlEntityRegex) ||
+      decodedUrl.match(whitespaceEscapeCharsRegex);
+  } while (charsToDecode && charsToDecode.length > 0);
+
+  const sanitizedUrl = decodedUrl;
+
+  if (!sanitizedUrl) {
+    return BLANK_URL;
+  }
+
+  if (isRelativeUrlWithoutProtocol(sanitizedUrl)) {
+    return sanitizedUrl;
+  }
+
+  // Remove any leading whitespace before checking the URL scheme
+  const trimmedUrl = sanitizedUrl.trimStart();
+  const urlSchemeParseResults = trimmedUrl.match(urlSchemeRegex);
+
+  if (!urlSchemeParseResults) {
+    return sanitizedUrl;
+  }
+
+  const urlScheme = urlSchemeParseResults[0].toLowerCase().trim();
+
+  if (invalidProtocolRegex.test(urlScheme)) {
+    return BLANK_URL;
+  }
+
+  const backSanitized = trimmedUrl.replace(/\\/g, "/");
+
+  // Handle special cases for mailto: and custom deep-link protocols
+  if (urlScheme === "mailto:" || urlScheme.includes("://")) {
+    return backSanitized;
+  }
+
+  // For http and https URLs, perform additional validation
+  if (urlScheme === "http:" || urlScheme === "https:") {
+    if (!isValidUrl(backSanitized)) {
+      return BLANK_URL;
+    }
+
+    const url = new URL(backSanitized);
+    url.protocol = url.protocol.toLowerCase();
+    url.hostname = url.hostname.toLowerCase();
+
+    return url.toString();
+  }
+
+  return backSanitized;
+}

node_modules/@braintree/sanitize-url/tsconfig.json

@@ -0,0 +1,12 @@
+{
+  "compilerOptions": {
+    "outDir": "./dist",
+    "allowJs": true,
+    "strict": true,
+    "target": "es5",
+    "resolveJsonModule": true,
+    "lib": ["es2015", "dom"]
+  },
+  "include": ["./src/**/*"],
+  "exclude": ["**/__tests__/*"]
+}

node_modules/@braintree/sanitize-url/vitest.config.ts

@@ -0,0 +1,8 @@
+import { defineConfig } from "vitest/config";
+
+export default defineConfig({
+  test: {
+    globals: true,
+    environment: "happy-dom",
+  },
+});