From 69ee2222c4f23cfb9f703369cac7e69bc6b79bef Mon Sep 17 00:00:00 2001
From: Kiko Beats <josefrancisco.verdu@gmail.com>
Date: Fri, 27 May 2022 12:47:36 +0200
Subject: [PATCH] fix: typecheck Buffer without using Buffer

inspired by https://github.com/feross/is-buffer
---
 index.html           | 75 +++++++++++++++++++++++++++++++++++++++-----
 src/factory.js       | 12 +++++--
 test/error/client.js |  5 ++-
 test/error/server.js | 35 +++++++++++++++++----
 4 files changed, 109 insertions(+), 18 deletions(-)

diff --git a/index.html b/index.html
index c150a54..d215797 100644
--- a/index.html
+++ b/index.html
@@ -11,8 +11,7 @@
     body {
       zoom: 120%;
       margin: 1rem;
-      background-color: #0D0208;
-      color: #00FF41;
+      background-color: #f8f9fa;
     }
 
     code {
@@ -20,10 +19,18 @@
       white-space: pre-wrap;
     }
 
+    samp {
+      color: #868e96;
+    }
+
+    output {
+      color: #15141A;
+    }
+
     div {
       margin-top: 12px;
       margin-bottom: 12px;
-      border-bottom: 1px solid #008F11;
+      border-bottom: 1px solid #dee2e6;
     }
   </style>
 </head>
@@ -33,8 +40,17 @@
   <script>
     const log = console.log
     const devTools = document.getElementById("devtools")
+
+    const writeLog = el => str => {
+      const node = document.createElement(el)
+      const line = document.createElement("div")
+      node.appendChild(document.createTextNode(str))
+      devTools.appendChild(node).appendChild(line)
+      log(str)
+    }
+
     window.console = {
-      log: function(str) {
+      log: function (str) {
         const node = document.createElement("output")
         const line = document.createElement("div")
         node.appendChild(document.createTextNode(str))
@@ -42,13 +58,56 @@
         log(str)
       }
     }
+
+    window.console = {
+      log: writeLog('output'),
+      debug: writeLog('samp')
+    }
+
   </script>
   <script src="./dist/mql.js"></script>
   <script>
-    console.log(`mql.version: ${mql.version}`)
-    mql('https://example.com').then(({ response, ...payload }) => {
-      console.log(JSON.stringify(payload, null, 2))
-    })
+    function getBrowser() {
+      var ua = navigator.userAgent,
+        tem, M = ua.match(
+          /(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || [];
+      if (/trident/i.test(M[1])) {
+        tem = /\brv[ :]+(\d+)/g.exec(ua) || [];
+        return {
+          name: 'IE',
+          version: (tem[1] || '')
+        };
+      }
+      if (M[1] === 'Chrome') {
+        tem = ua.match(/\bOPR|Edge\/(\d+)/)
+        if (tem != null) {
+          return {
+            name: 'Opera',
+            version: tem[1]
+          };
+        }
+      }
+      M = M[2] ? [M[1], M[2]] : [navigator.appName, navigator.appVersion, '-?'];
+      if ((tem = ua.match(/version\/(\d+)/i)) != null) {
+        M.splice(1, 1, tem[1]);
+      }
+
+      return `${M[0]} v${M[1]}`
+    }
+
+    const query = Object.fromEntries(new URL(document.location).searchParams)
+
+    console.log(`MQL v${mql.version} at ${getBrowser()}`)
+
+    const stderr = (payload) => console.debug(JSON.stringify(payload, null, 2))
+
+    const { url = 'https://example.com' } = query
+
+    mql(url).then(({
+      response,
+      ...payload
+    }) => stderr(payload)).catch(stderr)
+
   </script>
 </body>
 
diff --git a/src/factory.js b/src/factory.js
index dbee6c2..0a4a107 100644
--- a/src/factory.js
+++ b/src/factory.js
@@ -5,6 +5,12 @@ const ENDPOINT = {
 
 const isObject = input => input !== null && typeof input === 'object'
 
+const isBuffer = input =>
+  input != null &&
+  input.constructor != null &&
+  typeof input.constructor.isBuffer === 'function' &&
+  input.constructor.isBuffer(input)
+
 const parseBody = (input, error, url) => {
   try {
     return JSON.parse(input)
@@ -62,12 +68,12 @@ const factory = ({
     } catch (err) {
       const { response = {} } = err
       const { statusCode, body: rawBody, headers, url: uri = apiUrl } = response
-      const isBuffer = Buffer.isBuffer(rawBody)
+      const isBodyBuffer = isBuffer(rawBody)
 
       const body =
-        isObject(rawBody) && !isBuffer
+        isObject(rawBody) && !isBodyBuffer
           ? rawBody
-          : parseBody(isBuffer ? rawBody.toString() : rawBody, err, uri)
+          : parseBody(isBodyBuffer ? rawBody.toString() : rawBody, err, uri)
 
       if (body.code === 'EFATALCLIENT' && retryCount++ < 2) {
         return fetchFromApi(apiUrl, opts, retryCount)
diff --git a/test/error/client.js b/test/error/client.js
index 2ad7f9e..8975a2a 100644
--- a/test/error/client.js
+++ b/test/error/client.js
@@ -19,7 +19,10 @@ clients.forEach(({ constructor: mql, target }) => {
   })
 
   test(`${target} » EFATALCLIENT`, async t => {
-    const error = await t.throwsAsync(mql('https://example.com', { endpoint: 'https://notexist.dev' }), { instanceOf: mql.MicrolinkError })
+    const error = await t.throwsAsync(
+      mql('https://example.com', { endpoint: 'https://notexist.dev' }),
+      { instanceOf: mql.MicrolinkError }
+    )
 
     t.true(error.url === 'https://notexist.dev?url=https%3A%2F%2Fexample.com')
     t.true(error.code === 'EFATALCLIENT')
diff --git a/test/error/server.js b/test/error/server.js
index 6978e4c..7f75ffa 100644
--- a/test/error/server.js
+++ b/test/error/server.js
@@ -15,9 +15,12 @@ clients.forEach(({ constructor: mql, target }) => {
 
     const endpoint = await listen(server)
 
-    const error = await t.throwsAsync(mql('https://microlink.io', { endpoint, retry: 0 }), {
-      instanceOf: mql.MicrolinkError
-    })
+    const error = await t.throwsAsync(
+      mql('https://microlink.io', { endpoint, retry: 0 }),
+      {
+        instanceOf: mql.MicrolinkError
+      }
+    )
 
     t.true(!!error.url)
     t.true(!!error.code)
@@ -28,10 +31,14 @@ clients.forEach(({ constructor: mql, target }) => {
     t.true(!!error.message)
     t.true(!!error.description)
   })
+
   test(`${target} » server side generic error`, async t => {
-    const error = await t.throwsAsync(mql('https://microlink.io', { ttl: 100, retry: 0 }), {
-      instanceOf: mql.MicrolinkError
-    })
+    const error = await t.throwsAsync(
+      mql('https://microlink.io', { ttl: 100, retry: 0 }),
+      {
+        instanceOf: mql.MicrolinkError
+      }
+    )
 
     t.true(!!error.url)
     t.true(!!error.code)
@@ -42,6 +49,7 @@ clients.forEach(({ constructor: mql, target }) => {
     t.true(!!error.message)
     t.true(!!error.description)
   })
+
   test(`${target} » server side timeout`, async t => {
     const error = await t.throwsAsync(
       mql('https://kikobeats.com', {
@@ -62,4 +70,19 @@ clients.forEach(({ constructor: mql, target }) => {
     t.true(!!error.message)
     t.true(!!error.description)
   })
+
+  test(`${target} » EINVALURL`, async t => {
+    const error = await t.throwsAsync(mql('https://invalid-link', {}), {
+      instanceOf: mql.MicrolinkError
+    })
+
+    t.true(!!error.url)
+    t.true(!!error.code)
+    t.true(!!error.status)
+    t.true(!!error.more)
+    t.true(!!error.statusCode)
+    t.true(!!error.data)
+    t.true(!!error.message)
+    t.true(!!error.description)
+  })
 })