Function buildSafeBase

lib/util.js:213–234

(str)

}

function buildSafeBase(str) {
  const maxDotParts = str.split("..").length - 1;

  // If we used a segment that also existed in `str`, then we would be unable
  // to compute relative paths. For example, if `segment` were just "a":
  //
  //   const url = "../../a/"
  //   const base = buildSafeBase(url); // http://host/a/a/
  //   const joined = "http://host/a/";
  //   const result = relative(base, joined);
  //
  // Expected: "../../a/";
  // Actual: "a/"
  //
  const segment = buildUniqueSegment("p", str);

  let base = `${PROTOCOL_AND_HOST}/`;
  for (let i = 0; i < maxDotParts; i++) {
    base += `${segment}/`;
  }
  return base;
}

const ABSOLUTE_SCHEME = /^[A-Za-z0-9\+\-\.]+:/;
function getURLType(url) {