Initial commit

node_modules/html-encoding-sniffer/LICENSE.txt

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+Copyright © 2016 Domenic Denicola <d@domenic.me>
+
+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/html-encoding-sniffer/lib/html-encoding-sniffer.js

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+"use strict";
+const whatwgEncoding = require("whatwg-encoding");
+
+// https://html.spec.whatwg.org/#encoding-sniffing-algorithm
+module.exports = function sniffHTMLEncoding(buffer, options) {
+  let encoding = whatwgEncoding.getBOMEncoding(buffer); // see https://github.com/whatwg/html/issues/1910
+
+  if (options === undefined) {
+    options = {};
+  }
+
+  if (encoding === null && options.transportLayerEncodingLabel !== undefined) {
+    encoding = whatwgEncoding.labelToName(options.transportLayerEncodingLabel);
+  }
+
+  if (encoding === null) {
+    encoding = prescanMetaCharset(buffer);
+  }
+
+  if (encoding === null && options.defaultEncoding !== undefined) {
+    encoding = options.defaultEncoding;
+  }
+
+  if (encoding === null) {
+    encoding = "windows-1252";
+  }
+
+  return encoding;
+};
+
+// https://html.spec.whatwg.org/multipage/syntax.html#prescan-a-byte-stream-to-determine-its-encoding
+function prescanMetaCharset(buffer) {
+  const l = Math.min(buffer.length, 1024);
+  for (let i = 0; i < l; i++) {
+    let c = buffer[i];
+    if (c === 0x3C) {
+      // "<"
+      let c1 = buffer[i + 1];
+      let c2 = buffer[i + 2];
+      const c3 = buffer[i + 3];
+      const c4 = buffer[i + 4];
+      const c5 = buffer[i + 5];
+      // !-- (comment start)
+      if (c1 === 0x21 && c2 === 0x2D && c3 === 0x2D) {
+        i += 4;
+        for (; i < l; i++) {
+          c = buffer[i];
+          c1 = buffer[i + 1];
+          c2 = buffer[i + 2];
+          // --> (comment end)
+          if (c === 0x2D && c1 === 0x2D && c2 === 0x3E) {
+            i += 2;
+            break;
+          }
+        }
+      } else if ((c1 === 0x4D || c1 === 0x6D) &&
+         (c2 === 0x45 || c2 === 0x65) &&
+         (c3 === 0x54 || c3 === 0x74) &&
+         (c4 === 0x41 || c4 === 0x61) &&
+         (isSpaceCharacter(c5) || c5 === 0x2F)) {
+        // "meta" + space or /
+        i += 6;
+        let gotPragma = false;
+        let needPragma = null;
+        let charset = null;
+
+        let attrRes;
+        do {
+          attrRes = getAttribute(buffer, i, l);
+          if (attrRes.attr) {
+            if (attrRes.attr.name === "http-equiv") {
+              gotPragma = attrRes.attr.value === "content-type";
+            } else if (attrRes.attr.name === "content" && !charset) {
+              charset = extractCharacterEncodingFromMeta(attrRes.attr.value);
+              if (charset !== null) {
+                needPragma = true;
+              }
+            } else if (attrRes.attr.name === "charset") {
+              charset = whatwgEncoding.labelToName(attrRes.attr.value);
+              needPragma = false;
+            }
+          }
+          i = attrRes.i;
+        } while (attrRes.attr);
+
+        if (needPragma === null) {
+          continue;
+        }
+        if (needPragma === true && gotPragma === false) {
+          continue;
+        }
+        if (charset === null) {
+          continue;
+        }
+
+        if (charset === "UTF-16LE" || charset === "UTF-16BE") {
+          charset = "UTF-8";
+        }
+        if (charset === "x-user-defined") {
+          charset = "windows-1252";
+        }
+
+        return charset;
+      } else if ((c1 >= 0x41 && c1 <= 0x5A) || (c1 >= 0x61 && c1 <= 0x7A)) {
+        // a-z or A-Z
+        for (i += 2; i < l; i++) {
+          c = buffer[i];
+          // space or >
+          if (isSpaceCharacter(c) || c === 0x3E) {
+            break;
+          }
+        }
+        let attrRes;
+        do {
+          attrRes = getAttribute(buffer, i, l);
+          i = attrRes.i;
+        } while (attrRes.attr);
+      } else if (c1 === 0x21 || c1 === 0x2F || c1 === 0x3F) {
+        // ! or / or ?
+        for (i += 2; i < l; i++) {
+          c = buffer[i];
+          // >
+          if (c === 0x3E) {
+            break;
+          }
+        }
+      }
+    }
+  }
+  return null;
+}
+
+// https://html.spec.whatwg.org/multipage/syntax.html#concept-get-attributes-when-sniffing
+function getAttribute(buffer, i, l) {
+  for (; i < l; i++) {
+    let c = buffer[i];
+    // space or /
+    if (isSpaceCharacter(c) || c === 0x2F) {
+      continue;
+    }
+    // ">"
+    if (c === 0x3E) {
+      i++;
+      break;
+    }
+    let name = "";
+    let value = "";
+    nameLoop:for (; i < l; i++) {
+      c = buffer[i];
+      // "="
+      if (c === 0x3D && name !== "") {
+        i++;
+        break;
+      }
+      // space
+      if (isSpaceCharacter(c)) {
+        for (i++; i < l; i++) {
+          c = buffer[i];
+          // space
+          if (isSpaceCharacter(c)) {
+            continue;
+          }
+          // not "="
+          if (c !== 0x3D) {
+            return { attr: { name, value }, i };
+          }
+
+          i++;
+          break nameLoop;
+        }
+        break;
+      }
+      // / or >
+      if (c === 0x2F || c === 0x3E) {
+        return { attr: { name, value }, i };
+      }
+      // A-Z
+      if (c >= 0x41 && c <= 0x5A) {
+        name += String.fromCharCode(c + 0x20); // lowercase
+      } else {
+        name += String.fromCharCode(c);
+      }
+    }
+    c = buffer[i];
+    // space
+    if (isSpaceCharacter(c)) {
+      for (i++; i < l; i++) {
+        c = buffer[i];
+        // space
+        if (isSpaceCharacter(c)) {
+          continue;
+        } else {
+          break;
+        }
+      }
+    }
+    // " or '
+    if (c === 0x22 || c === 0x27) {
+      const quote = c;
+      for (i++; i < l; i++) {
+        c = buffer[i];
+
+        if (c === quote) {
+          i++;
+          return { attr: { name, value }, i };
+        }
+
+        // A-Z
+        if (c >= 0x41 && c <= 0x5A) {
+          value += String.fromCharCode(c + 0x20); // lowercase
+        } else {
+          value += String.fromCharCode(c);
+        }
+      }
+    }
+
+    // >
+    if (c === 0x3E) {
+      return { attr: { name, value }, i };
+    }
+
+    // A-Z
+    if (c >= 0x41 && c <= 0x5A) {
+      value += String.fromCharCode(c + 0x20); // lowercase
+    } else {
+      value += String.fromCharCode(c);
+    }
+
+    for (i++; i < l; i++) {
+      c = buffer[i];
+
+      // space or >
+      if (isSpaceCharacter(c) || c === 0x3E) {
+        return { attr: { name, value }, i };
+      }
+
+      // A-Z
+      if (c >= 0x41 && c <= 0x5A) {
+        value += String.fromCharCode(c + 0x20); // lowercase
+      } else {
+        value += String.fromCharCode(c);
+      }
+    }
+  }
+  return { i };
+}
+
+function extractCharacterEncodingFromMeta(string) {
+  let position = 0;
+
+  while (true) {
+    let subPosition = string.substring(position).search(/charset/i);
+
+    if (subPosition === -1) {
+      return null;
+    }
+    subPosition += "charset".length;
+
+    while (isSpaceCharacter(string[subPosition].charCodeAt(0))) {
+      ++subPosition;
+    }
+
+    if (string[subPosition] !== "=") {
+      position = subPosition - 1;
+      continue;
+    }
+
+    ++subPosition;
+
+    while (isSpaceCharacter(string[subPosition].charCodeAt(0))) {
+      ++subPosition;
+    }
+
+    position = subPosition;
+    break;
+  }
+
+  if (string[position] === "\"" || string[position] === "'") {
+    const nextIndex = string.indexOf(string[position], position + 1);
+
+    if (nextIndex !== -1) {
+      return whatwgEncoding.labelToName(string.substring(position + 1, nextIndex));
+    }
+
+    // It is an unmatched quotation mark
+    return null;
+  }
+
+  if (string.length === position + 1) {
+    return null;
+  }
+
+  let end = string.substring(position + 1).search(/\x09|\x0A|\x0C|\x0D|\x20|;/);
+  if (end === -1) {
+    end = string.length;
+  }
+  return whatwgEncoding.labelToName(string.substring(position, end));
+}
+
+function isSpaceCharacter(c) {
+  return c === 0x09 || c === 0x0A || c === 0x0C || c === 0x0D || c === 0x20;
+}

node_modules/html-encoding-sniffer/package.json

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+{
+  "name": "html-encoding-sniffer",
+  "description": "Sniff the encoding from a HTML byte stream",
+  "version": "1.0.2",
+  "author": "Domenic Denicola <d@domenic.me> (https://domenic.me/)",
+  "license": "MIT",
+  "repository": "jsdom/html-encoding-sniffer",
+  "main": "lib/html-encoding-sniffer.js",
+  "files": [
+    "lib/"
+  ],
+  "dependencies": {
+    "whatwg-encoding": "^1.0.1"
+  },
+  "devDependencies": {
+    "eslint": "^3.8.0",
+    "mocha": "^3.1.2"
+  }
+}