.

node_modules/whatwg-url/lib/urlencoded.js

@@ -0,0 +1,138 @@
+"use strict";
+const { isASCIIHex } = require("./infra");
+
+function strictlySplitByteSequence(buf, cp) {
+  const list = [];
+  let last = 0;
+  let i = buf.indexOf(cp);
+  while (i >= 0) {
+    list.push(buf.slice(last, i));
+    last = i + 1;
+    i = buf.indexOf(cp, last);
+  }
+  if (last !== buf.length) {
+    list.push(buf.slice(last));
+  }
+  return list;
+}
+
+function replaceByteInByteSequence(buf, from, to) {
+  let i = buf.indexOf(from);
+  while (i >= 0) {
+    buf[i] = to;
+    i = buf.indexOf(from, i + 1);
+  }
+  return buf;
+}
+
+function percentEncode(c) {
+  let hex = c.toString(16).toUpperCase();
+  if (hex.length === 1) {
+    hex = "0" + hex;
+  }
+
+  return "%" + hex;
+}
+
+function percentDecode(input) {
+  const output = Buffer.alloc(input.byteLength);
+  let ptr = 0;
+  for (let i = 0; i < input.length; ++i) {
+    if (input[i] !== 37 || !isASCIIHex(input[i + 1]) || !isASCIIHex(input[i + 2])) {
+      output[ptr++] = input[i];
+    } else {
+      output[ptr++] = parseInt(input.slice(i + 1, i + 3).toString(), 16);
+      i += 2;
+    }
+  }
+  return output.slice(0, ptr);
+}
+
+function parseUrlencoded(input) {
+  const sequences = strictlySplitByteSequence(input, 38);
+  const output = [];
+  for (const bytes of sequences) {
+    if (bytes.length === 0) {
+      continue;
+    }
+
+    let name;
+    let value;
+    const indexOfEqual = bytes.indexOf(61);
+
+    if (indexOfEqual >= 0) {
+      name = bytes.slice(0, indexOfEqual);
+      value = bytes.slice(indexOfEqual + 1);
+    } else {
+      name = bytes;
+      value = Buffer.alloc(0);
+    }
+
+    name = replaceByteInByteSequence(Buffer.from(name), 43, 32);
+    value = replaceByteInByteSequence(Buffer.from(value), 43, 32);
+
+    output.push([percentDecode(name).toString(), percentDecode(value).toString()]);
+  }
+  return output;
+}
+
+function serializeUrlencodedByte(input) {
+  let output = "";
+  for (const byte of input) {
+    if (byte === 32) {
+      output += "+";
+    } else if (byte === 42 ||
+               byte === 45 ||
+               byte === 46 ||
+               (byte >= 48 && byte <= 57) ||
+               (byte >= 65 && byte <= 90) ||
+               byte === 95 ||
+               (byte >= 97 && byte <= 122)) {
+      output += String.fromCodePoint(byte);
+    } else {
+      output += percentEncode(byte);
+    }
+  }
+  return output;
+}
+
+function serializeUrlencoded(tuples, encodingOverride = undefined) {
+  let encoding = "utf-8";
+  if (encodingOverride !== undefined) {
+    encoding = encodingOverride;
+  }
+
+  let output = "";
+  for (const [i, tuple] of tuples.entries()) {
+    // TODO: handle encoding override
+    const name = serializeUrlencodedByte(Buffer.from(tuple[0]));
+    let value = tuple[1];
+    if (tuple.length > 2 && tuple[2] !== undefined) {
+      if (tuple[2] === "hidden" && name === "_charset_") {
+        value = encoding;
+      } else if (tuple[2] === "file") {
+        // value is a File object
+        value = value.name;
+      }
+    }
+    value = serializeUrlencodedByte(Buffer.from(value));
+    if (i !== 0) {
+      output += "&";
+    }
+    output += `${name}=${value}`;
+  }
+  return output;
+}
+
+module.exports = {
+  percentEncode,
+  percentDecode,
+
+  // application/x-www-form-urlencoded string parser
+  parseUrlencoded(input) {
+    return parseUrlencoded(Buffer.from(input));
+  },
+
+  // application/x-www-form-urlencoded serializer
+  serializeUrlencoded
+};