dynatrace-cordova-outsystems-plugin/node_modules/whatwg-url/lib/urlencoded.js

This plugin gives you the ability to use the Dynatrace instrumentation in your hybrid application (Cordova, Ionic, ..). It uses the Mobile Agent, the JavaScript Agent and the Javascript Bridge. The Mobile Agent will give you all device specific values con

"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
};