Function WebSafeBase64Escape

be/src/gutil/strings/escaping.cc:1292–1296

  return Base64EscapeInternal(src, szsrc, dest, szdest, kBase64Chars, true);
}
int WebSafeBase64Escape(const unsigned char *src, int szsrc, char *dest,
                        int szdest, bool do_padding) {
  return Base64EscapeInternal(src, szsrc, dest, szdest,
                              kWebSafeBase64Chars, do_padding);
}

void Base64EscapeInternal(const unsigned char* src, int szsrc,
                          string* dest, bool do_padding,