bugfix: Remove invalid pathname slashes in getURL() utility

packages/next/src/shared/lib/utils.ts

@@ -332,7 +332,8 @@ export function getLocationOrigin() {
 export function getURL() {
   const { href } = window.location
   const origin = getLocationOrigin()
-  return href.substring(origin.length)
+  const pathname = href.substring(origin.length)
+  return pathname.replace(/^\/{2,}/, '/')
 }
 
 export function getDisplayName<P>(Component: ComponentType<P>) {

test/e2e/invalid-url-slash/certificates/localhost-key.pem

@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvAIBADANBgkqhkiG9w0BAQEFAASCBKYwggSiAgEAAoIBAQC2skb3RwQBKtJL
+kLfxmPMxAZG4o6R4m9ipcMJtpB6im6di7g+fZzRP+j0AtOnnIaM6ZuT61nCTZKd7
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+2vSzjWVNAgMBAAECggEACuIT2Cci1e73GAlG691wnzq4s4cMBSNDhNRywJVGPemH
+zxzfUV+Ufi8p8yDTzjDyyEfY3BhqHF2inHUyceKImTBcTWe4f7uCWf0ZnS/iYbAD
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+KxFWCb2kervPw7nJqwC/nY6byMnUWGNEvK/Vo42S33bYKWRvR8Uu6PoFKNd3ETpw
+/TSLWZIKgj0sa07/PZNSDBHawERitjqJh4PmFw3+cP+acbE1iv/NewCtAoGAWOzt
+QiRtmzECxgvDp1xN0LOsNhb8cQvyclVhy+WRfLrg3Y25w0B6oDQakreVOFJdyhmT
+ZV0fCf+alHtTj6gxpdj6dh1oK0w34g6ORTbfYar+zw5tS9vcA1bFKwqNNTxNlmoe
+nOXO8xhSnNSoLsag+bmZHUwgxbNleHyF6v0j0qkCgYAklO2RDc2RDccXYAe6MbT7
+EYExvS+K09CF4PVPoFk1QZxENuXfewDli9UCwt+uJvVacJOnUyLjMkkooibTTk+A
+xf/dAp5ECrTHny/cMSerFJEgVZYsH06m+0a+RP+zL45skm/EsidOvIS80OkRr+Vz
+rgIUqg2F14h2H2vbBlqrqQ==
+-----END PRIVATE KEY-----

test/e2e/invalid-url-slash/certificates/localhost.pem

@@ -0,0 +1,25 @@
+-----BEGIN CERTIFICATE-----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+T6P2UIfjbq7pUX9GMBoGA1UdEQQTMBGCCWxvY2FsaG9zdIcEfwAAATANBgkqhkiG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+-----END CERTIFICATE-----

test/e2e/invalid-url-slash/invalid-url-slash-http.test.ts

@@ -0,0 +1,28 @@
+import { join } from 'node:path'
+import webdriver from 'next-webdriver'
+import { createNext, FileRef, type NextInstance } from 'e2e-utils'
+
+// Pattern that does not cause error
+describe('invalid HTTP URL slash', () => {
+  let next: NextInstance
+
+  beforeAll(async () => {
+    next = await createNext({
+      files: {
+        pages: new FileRef(join(__dirname, 'pages')),
+      },
+    })
+  })
+
+  afterAll(() => {
+    next.destroy()
+  })
+
+  it('should navigate from // to / correctly client-side', async () => {
+    const browser = await webdriver(next.url, '/')
+    // Change to "//"
+    await browser.elementByCss('button').click().waitForIdleNetwork()
+    const text = await browser.waitForElementByCss('h1', 100).text()
+    expect(text).toBe('index page')
+  })
+})

test/e2e/invalid-url-slash/invalid-url-slash-https.test.ts

@@ -0,0 +1,70 @@
+import fs from 'node:fs'
+import { join } from 'node:path'
+import https from 'https'
+import httpProxy from 'http-proxy'
+import { findPort } from 'next-test-utils'
+import webdriver from 'next-webdriver'
+import { FileRef, nextTestSetup } from 'e2e-utils'
+
+// Pattern that may cause error
+describe('invalid HTTPS URL slash', () => {
+  let proxyPort: number
+  let proxyServer: https.Server
+
+  const { next, skipped } = nextTestSetup({
+    files: {
+      pages: new FileRef(join(__dirname, 'pages')),
+    },
+    // This test is skipped when deployed because it relies on a proxy server
+    skipDeployment: true,
+  })
+
+  if (skipped) return
+
+  beforeAll(async () => {
+    proxyPort = await findPort()
+
+    const ssl = {
+      key: fs.readFileSync(
+        join(__dirname, 'certificates/localhost-key.pem'),
+        'utf8'
+      ),
+      cert: fs.readFileSync(
+        join(__dirname, 'certificates/localhost.pem'),
+        'utf8'
+      ),
+    }
+
+    const proxy = httpProxy.createProxyServer({
+      target: `http://localhost:${next.appPort}`,
+      ssl,
+      secure: false,
+    })
+
+    proxyServer = https.createServer(ssl, async (req, res) => {
+      proxy.web(req, res)
+    })
+
+    proxy.on('error', (err) => {
+      throw new Error(`Failed to proxy: ${err.message}`)
+    })
+
+    await new Promise<void>((resolve) => {
+      proxyServer.listen(proxyPort, () => resolve())
+    })
+  })
+
+  afterAll(() => {
+    proxyServer.close()
+  })
+
+  it('should navigate from // to / correctly client-side', async () => {
+    const browser = await webdriver(`https://localhost:${proxyPort}`, '/', {
+      ignoreHTTPSErrors: true,
+    })
+    // Change to "//"
+    await browser.elementByCss('button').click().waitForIdleNetwork()
+    const text = await browser.waitForElementByCss('h1', 100).text()
+    expect(text).toBe('index page')
+  })
+})

test/e2e/invalid-url-slash/pages/index.js

@@ -0,0 +1,20 @@
+'use client'
+
+export default function Page() {
+  const goInvalidUrl = () => {
+    const { protocol, hostname, port } = location
+
+    location.href = `${protocol}//${hostname}${port ? ':' + port : ''}//`
+  }
+
+  return (
+    <>
+      <h1>index page</h1>
+      <p>
+        <button type="button" onClick={goInvalidUrl}>
+          Go invalid URL
+        </button>
+      </p>
+    </>
+  )
+}

test/unit/utils.test.ts

@@ -0,0 +1,83 @@
+/* eslint-env jest */
+import { getURL } from 'next/dist/shared/lib/utils'
+
+describe('getURL', () => {
+  // Convenience function so tests can be aligned neatly
+  // and easy to eyeball
+  const check = (url: string, pathname: string) => {
+    global.window.location = new URL(url)
+    const rootRelativeUrl = getURL()
+    expect(rootRelativeUrl).toBe(pathname)
+  }
+
+  beforeAll(() => {
+    global.window = {}
+  })
+
+  afterAll(() => {
+    delete global.window
+  })
+
+  it('should get valid root path in HTTP', () => {
+    check('http://example.com:3210/', '/')
+  })
+
+  it('should get converted valid root path from invalid URL in HTTP', () => {
+    check('http://example.com:3210//', '/')
+  })
+
+  it('should get valid path in HTTP', () => {
+    check(
+      'http://example.com:3210/someA/pathB?fooC=barD#hashE',
+      '/someA/pathB?fooC=barD#hashE'
+    )
+  })
+
+  it('should get converted valid path from invalid URL in HTTP', () => {
+    check(
+      'http://example.com:3210//someA/pathB?fooC=barD#hashE',
+      '/someA/pathB?fooC=barD#hashE'
+    )
+  })
+
+  it('should get valid root path in HTTPS', () => {
+    check('https://example.com:3210/', '/')
+  })
+
+  it('should get converted valid root path from invalid URL in HTTPS', () => {
+    check('https://example.com:3210//', '/')
+  })
+
+  it('should get valid path in HTTPS', () => {
+    check(
+      'https://example.com:3210/someA/pathB?fooC=barD#hashE',
+      '/someA/pathB?fooC=barD#hashE'
+    )
+  })
+
+  it('should get converted valid path from invalid URL in HTTPS', () => {
+    check(
+      'https://example.com:3210//someA/pathB?fooC=barD#hashE',
+      '/someA/pathB?fooC=barD#hashE'
+    )
+  })
+
+  it('should get valid path on special protocol', () => {
+    check(
+      'ionic://localhost/someA/pathB?fooC=barD#hashE',
+      '/someA/pathB?fooC=barD#hashE'
+    )
+    check('file:///someA/pathB?fooC=barD#hashE', '/someA/pathB?fooC=barD#hashE')
+  })
+
+  it('should get valid path from invalid URL on special protocol', () => {
+    check(
+      'ionic://localhost//someA/pathB?fooC=barD#hashE',
+      '/someA/pathB?fooC=barD#hashE'
+    )
+    check(
+      'file:////someA/pathB?fooC=barD#hashE',
+      '/someA/pathB?fooC=barD#hashE'
+    )
+  })
+})