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#![forbid(unsafe_code)]
#![no_std]
#[cfg(not(feature = "std"))]
extern crate alloc;
#[cfg(feature = "std")]
extern crate std;
mod lib {
#[cfg(not(feature = "std"))]
pub use alloc::fmt;
#[cfg(feature = "std")]
pub use std::fmt;
#[cfg(not(feature = "std"))]
pub use alloc::vec::Vec;
#[cfg(feature = "std")]
pub use std::vec::Vec;
#[cfg(not(feature = "std"))]
pub use alloc::string::String;
#[cfg(feature = "std")]
pub use std::string::String;
}
const LINE_LENGTH_LIMIT: usize = 76;
static HEX_CHARS: &[char] = &[
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
];
/// A flag that allows control over the decoding strictness.
#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub enum ParseMode {
/// Perform strict checking over the input, and return an error if any
/// input appears malformed.
Strict,
/// Perform robust parsing, and gracefully handle any malformed input. This
/// can result in the decoded output being different than what was intended.
Robust,
}
/// An error type that represents different kinds of decoding errors.
#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub enum QuotedPrintableError {
/// A byte was found in the input that was outside of the allowed range. The
/// allowed range is the horizontal tab (ASCII 0x09), CR/LF characters (ASCII
/// 0x0D and 0x0A), and anything in the ASCII range 0x20 to 0x7E, inclusive.
InvalidByte,
/// Lines where found in the input that exceeded 76 bytes in length, excluding
/// the terminating CRLF.
LineTooLong,
/// An '=' character was found in the input without the proper number of
/// hex-characters following it. This includes '=' characters followed
/// by a single character and then the CRLF pair, for example.
IncompleteHexOctet,
/// An '=' character was found with two following characters, but they were
/// not hex characters. '=Hi' for example would be an invalid encoding.
InvalidHexOctet,
/// An '=' character was found with two following hex characters, but the
/// hex characters were lowercase rather than uppercase. The spec explicitly
/// requires uppercase hex to be used, so this is considered an error.
LowercaseHexOctet,
}
impl lib::fmt::Display for QuotedPrintableError {
fn fmt(&self, f: &mut lib::fmt::Formatter) -> lib::fmt::Result {
match *self {
QuotedPrintableError::InvalidByte => {
write!(
f,
"A unallowed byte was found in the quoted-printable input"
)
}
QuotedPrintableError::LineTooLong => {
write!(
f,
"A line length in the quoted-printed input exceeded 76 bytes"
)
}
QuotedPrintableError::IncompleteHexOctet => {
write!(
f,
"A '=' followed by only one character was found in the input"
)
}
QuotedPrintableError::InvalidHexOctet => {
write!(
f,
"A '=' followed by non-hex characters was found in the input"
)
}
QuotedPrintableError::LowercaseHexOctet => {
write!(f, "A '=' was followed by lowercase hex characters")
}
}
}
}
#[cfg(feature = "std")]
impl std::error::Error for QuotedPrintableError {
fn description(&self) -> &str {
"invalid quoted-printable input"
}
fn cause(&self) -> Option<&dyn std::error::Error> {
None
}
}
/// Decodes a piece of quoted-printable data.
///
/// The quoted-printable transfer-encoding is defined in IETF RFC 2045, section
/// 6.7. This function attempts to decode input that is conformant with that
/// spec. Note that quoted-printable encoding is independent of charset, and so
/// this function returns a Vec<u8> of bytes upon success. It is up to the caller
/// to convert that to a String if desired; the charset required to do so must
/// come from somewhere else.
///
/// # Examples
///
/// ```
/// use quoted_printable::{decode, ParseMode};
/// let decoded = decode("hello=3Dworld=0D=0A".as_bytes(), ParseMode::Robust).unwrap();
/// assert_eq!("hello=world\r\n", String::from_utf8(decoded).unwrap());
/// ```
///
/// # Errors
///
/// If this function is called with ParseMode::Strict, then it may return
/// a QuotedPrintableError if it detects that the input does not strictly conform
/// to the quoted-printable spec. If this function is called with ParseMode::Robust,
/// then it will attempt to gracefully handle any errors that arise. This might
/// result in input bytes being stripped out and ignored in some cases. Refer
/// to IETF RFC 2045, section 6.7 for details on what constitutes valid and
/// invalid input, and what a "robust" implementation would do in the face of
/// invalid input.
#[inline(always)]
pub fn decode<R: AsRef<[u8]>>(
input: R,
mode: ParseMode,
) -> Result<lib::Vec<u8>, QuotedPrintableError> {
_decode(input.as_ref(), mode)
}
fn _decode(input: &[u8], mode: ParseMode) -> Result<lib::Vec<u8>, QuotedPrintableError> {
let filtered = input
.into_iter()
.filter_map(|&c| match c {
b'\t' | b'\r' | b'\n' | b' '..=b'~' => Some(c as char),
_ => None,
})
.collect::<lib::String>();
if mode == ParseMode::Strict && filtered.len() != input.len() {
return Err(QuotedPrintableError::InvalidByte);
}
let mut decoded = lib::Vec::new();
let mut lines = filtered.lines();
let mut add_line_break = None;
loop {
let mut bytes = match lines.next() {
Some(v) => v.trim_end().bytes(),
None => {
if mode == ParseMode::Strict && add_line_break == Some(false) {
return Err(QuotedPrintableError::IncompleteHexOctet);
}
break;
}
};
if mode == ParseMode::Strict && bytes.len() > LINE_LENGTH_LIMIT {
return Err(QuotedPrintableError::LineTooLong);
}
if add_line_break == Some(true) {
decoded.push(b'\r');
decoded.push(b'\n');
add_line_break = Some(false);
}
loop {
let byte = match bytes.next() {
Some(v) => v,
None => {
add_line_break = Some(true);
break;
}
};
if byte == b'=' {
let upper = match bytes.next() {
Some(v) => v,
None => break,
};
let lower = match bytes.next() {
Some(v) => v,
None => {
if mode == ParseMode::Strict {
return Err(QuotedPrintableError::IncompleteHexOctet);
}
decoded.push(byte);
decoded.push(upper);
add_line_break = Some(true);
break;
}
};
let upper_char = upper as char;
let lower_char = lower as char;
if upper_char.is_digit(16) && lower_char.is_digit(16) {
if mode == ParseMode::Strict {
if upper_char.to_uppercase().next() != Some(upper_char)
|| lower_char.to_uppercase().next() != Some(lower_char)
{
return Err(QuotedPrintableError::LowercaseHexOctet);
}
}
let combined =
upper_char.to_digit(16).unwrap() << 4 | lower_char.to_digit(16).unwrap();
decoded.push(combined as u8);
} else {
if mode == ParseMode::Strict {
return Err(QuotedPrintableError::InvalidHexOctet);
}
decoded.push(byte);
decoded.push(upper);
decoded.push(lower);
}
} else {
decoded.push(byte);
}
}
}
if filtered.ends_with('\n') {
// the filtered.lines() call above ignores trailing newlines instead
// of returning an empty string in the last element. So if there was
// a trailing newline, let's tack on the CRLF to carry that through
// the decoder.
decoded.push(b'\r');
decoded.push(b'\n');
}
Ok(decoded)
}
fn append(
result: &mut lib::String,
to_append: &[char],
bytes_on_line: &mut usize,
backup_pos: &mut usize,
) {
if *bytes_on_line + to_append.len() > LINE_LENGTH_LIMIT {
if *bytes_on_line == LINE_LENGTH_LIMIT {
// We're already at the max length, so inserting the '=' in the soft
// line break would put us over. Instead, we insert the soft line
// break at the backup pos, which is just before the last thing
// appended.
*bytes_on_line = result.len() - *backup_pos;
result.insert_str(*backup_pos, "=\r\n");
} else {
result.push_str("=\r\n");
*bytes_on_line = 0;
}
}
result.extend(to_append);
*bytes_on_line = *bytes_on_line + to_append.len();
*backup_pos = result.len() - to_append.len();
}
fn encode_trailing_space_tab(
result: &mut lib::String,
bytes_on_line: &mut usize,
backup_pos: &mut usize,
) {
// If the last character before a CRLF was a space or tab, then encode it
// since "Octets with values of 9 and 32 ... MUST NOT be so represented
// at the end of an encoded line." We can just pop it off the end of the
// result and append the encoded version. The encoded version may end up
// getting bumped to a new line, but in that case we know that the soft
// line break '=' will always fit because we're removing one char before
// calling append.
match result.chars().last() {
Some(' ') => {
*bytes_on_line -= 1;
result.pop();
append(result, &['=', '2', '0'], bytes_on_line, backup_pos);
}
Some('\t') => {
*bytes_on_line -= 1;
result.pop();
append(result, &['=', '0', '9'], bytes_on_line, backup_pos);
}
_ => (),
};
}
#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
enum InputMode {
/// Treat the input as text, and don't encode CRLF pairs.
Text,
/// Treat the input as binary, and encode all CRLF pairs.
Binary,
}
/// Encodes some bytes into quoted-printable format, treating the input as text.
///
/// The quoted-printable transfer-encoding is defined in IETF RFC 2045, section
/// 6.7. This function encodes a set of raw bytes into a format conformant with
/// that spec. The output contains CRLF pairs as needed so that each line is
/// wrapped to 76 characters or less (not including the CRLF).
///
/// # Examples
///
/// ```
/// use quoted_printable::encode;
/// let encoded = encode("hello, \u{20ac} zone!");
/// assert_eq!("hello, =E2=82=AC zone!", String::from_utf8(encoded).unwrap());
/// ```
#[inline(always)]
pub fn encode<R: AsRef<[u8]>>(input: R) -> lib::Vec<u8> {
let encoded_as_string = _encode(input.as_ref(), InputMode::Text);
encoded_as_string.into()
}
/// Encodes some bytes into quoted-printable format, treating the input as binary.
///
/// The quoted-printable transfer-encoding is defined in IETF RFC 2045, section
/// 6.7. This function encodes a set of raw bytes into a format conformant with
/// that spec. The output contains CRLF pairs as needed so that each line is
/// wrapped to 76 characters or less (not including the CRLF).
///
/// # Examples
///
/// ```
/// use quoted_printable::encode_binary;
/// let encoded = encode_binary("hello, \u{20ac} zone!\r\n");
/// assert_eq!("hello, =E2=82=AC zone!=0D=0A", String::from_utf8(encoded).unwrap());
/// ```
#[inline(always)]
pub fn encode_binary<R: AsRef<[u8]>>(input: R) -> lib::Vec<u8> {
let encoded_as_string = _encode(input.as_ref(), InputMode::Binary);
encoded_as_string.into()
}
fn _encode(input: &[u8], mode: InputMode) -> lib::String {
let mut result = lib::String::new();
let mut on_line: usize = 0;
let mut backup_pos: usize = 0;
let mut was_cr = false;
let mut it = input.iter();
while let Some(&byte) = it.next() {
if was_cr {
if byte == b'\n' {
encode_trailing_space_tab(&mut result, &mut on_line, &mut backup_pos);
match mode {
InputMode::Text => {
result.push_str("\r\n");
on_line = 0;
}
InputMode::Binary => {
append(&mut result, &['=', '0', 'D'], &mut on_line, &mut backup_pos);
append(&mut result, &['=', '0', 'A'], &mut on_line, &mut backup_pos);
}
};
was_cr = false;
continue;
}
// encode the CR ('\r') we skipped over before
append(&mut result, &['=', '0', 'D'], &mut on_line, &mut backup_pos);
}
if byte == b'\r' {
// remember we had a CR ('\r') but do not encode it yet
was_cr = true;
continue;
} else {
was_cr = false;
}
encode_byte(&mut result, byte, &mut on_line, &mut backup_pos);
}
// we haven't yet encoded the last CR ('\r') so do it now
if was_cr {
append(&mut result, &['=', '0', 'D'], &mut on_line, &mut backup_pos);
} else {
encode_trailing_space_tab(&mut result, &mut on_line, &mut backup_pos);
}
result
}
/// Encodes some bytes into quoted-printable format.
///
/// The difference to `encode` is that this function returns a `String`.
///
/// The quoted-printable transfer-encoding is defined in IETF RFC 2045, section
/// 6.7. This function encodes a set of raw bytes into a format conformant with
/// that spec. The output contains CRLF pairs as needed so that each line is
/// wrapped to 76 characters or less (not including the CRLF).
///
/// # Examples
///
/// ```
/// use quoted_printable::encode_to_str;
/// let encoded = encode_to_str("hello, \u{20ac} zone!");
/// assert_eq!("hello, =E2=82=AC zone!", encoded);
/// ```
#[inline(always)]
pub fn encode_to_str<R: AsRef<[u8]>>(input: R) -> lib::String {
_encode(input.as_ref(), InputMode::Text)
}
/// Encodes some bytes into quoted-printable format.
///
/// The difference to `encode_binary` is that this function returns a `String`.
///
/// The quoted-printable transfer-encoding is defined in IETF RFC 2045, section
/// 6.7. This function encodes a set of raw bytes into a format conformant with
/// that spec. The output contains CRLF pairs as needed so that each line is
/// wrapped to 76 characters or less (not including the CRLF).
///
/// # Examples
///
/// ```
/// use quoted_printable::encode_binary_to_str;
/// let encoded = encode_binary_to_str("hello, \u{20ac} zone!\r\n");
/// assert_eq!("hello, =E2=82=AC zone!=0D=0A", encoded);
/// ```
#[inline(always)]
pub fn encode_binary_to_str<R: AsRef<[u8]>>(input: R) -> lib::String {
_encode(input.as_ref(), InputMode::Binary)
}
#[inline]
fn encode_byte(
result: &mut lib::String,
to_append: u8,
on_line: &mut usize,
backup_pos: &mut usize,
) {
match to_append {
b'=' => append(result, &['=', '3', 'D'], on_line, backup_pos),
b'\t' | b' '..=b'~' => append(result, &[char::from(to_append)], on_line, backup_pos),
_ => append(result, &hex_encode_byte(to_append), on_line, backup_pos),
}
}
#[inline(always)]
fn hex_encode_byte(byte: u8) -> [char; 3] {
[
'=',
lower_nibble_to_hex(byte >> 4),
lower_nibble_to_hex(byte),
]
}
#[inline(always)]
fn lower_nibble_to_hex(half_byte: u8) -> char {
HEX_CHARS[(half_byte & 0x0F) as usize]
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_decode() {
assert_eq!(
"hello world",
lib::String::from_utf8(decode("hello world", ParseMode::Strict).unwrap()).unwrap()
);
assert_eq!(
"Now's the time for all folk to come to the aid of their country.",
lib::String::from_utf8(
decode(
"Now's the time =\r\nfor all folk to come=\r\n \
to the aid of their country.",
ParseMode::Strict,
)
.unwrap(),
)
.unwrap()
);
assert_eq!(
"\r\nhello=world",
lib::String::from_utf8(decode("=0D=0Ahello=3Dworld", ParseMode::Strict).unwrap())
.unwrap()
);
assert_eq!(
"hello world\r\ngoodbye world",
lib::String::from_utf8(
decode("hello world\r\ngoodbye world", ParseMode::Strict).unwrap(),
)
.unwrap()
);
assert_eq!(
"hello world\r\ngoodbye world",
lib::String::from_utf8(
decode("hello world \r\ngoodbye world ", ParseMode::Strict).unwrap(),
)
.unwrap()
);
assert_eq!(
"hello world\r\ngoodbye world x",
lib::String::from_utf8(
decode(
"hello world \r\ngoodbye world = \r\nx",
ParseMode::Strict,
)
.unwrap(),
)
.unwrap()
);
assert_eq!(true, decode("hello world=x", ParseMode::Strict).is_err());
assert_eq!(
"hello world=x",
lib::String::from_utf8(decode("hello world=x", ParseMode::Robust).unwrap()).unwrap()
);
assert_eq!(true, decode("hello =world=", ParseMode::Strict).is_err());
assert_eq!(
"hello =world",
lib::String::from_utf8(decode("hello =world=", ParseMode::Robust).unwrap()).unwrap()
);
assert_eq!(true, decode("hello world=3d", ParseMode::Strict).is_err());
assert_eq!(
"hello world=",
lib::String::from_utf8(decode("hello world=3d", ParseMode::Robust).unwrap()).unwrap()
);
assert_eq!(true, decode("hello world=3m", ParseMode::Strict).is_err());
assert_eq!(
"hello world=3m",
lib::String::from_utf8(decode("hello world=3m", ParseMode::Robust).unwrap()).unwrap()
);
assert_eq!(true, decode("hello\u{FF}world", ParseMode::Strict).is_err());
assert_eq!(
"helloworld",
lib::String::from_utf8(decode("hello\u{FF}world", ParseMode::Robust).unwrap()).unwrap()
);
assert_eq!(
true,
decode(
"12345678901234567890123456789012345678901234567890123456789012345678901234567",
ParseMode::Strict,
)
.is_err()
);
assert_eq!(
"12345678901234567890123456789012345678901234567890123456789012345678901234567",
lib::String::from_utf8(
decode(
"12345678901234567890123456789012345678901234567890123456789012345678901234567",
ParseMode::Robust,
)
.unwrap(),
)
.unwrap()
);
assert_eq!(
"1234567890123456789012345678901234567890123456789012345678901234567890123456",
lib::String::from_utf8(
decode(
"1234567890123456789012345678901234567890123456789012345678901234567890123456",
ParseMode::Strict,
)
.unwrap(),
)
.unwrap()
);
}
#[test]
fn test_encode() {
assert_eq!("hello, world!", encode_to_str("hello, world!".as_bytes()));
assert_eq!(
"hello,=0Cworld!",
encode_to_str("hello,\u{c}world!".as_bytes())
);
assert_eq!(
"this=00is=C3=BFa=3Dlong=0Dstring=0Athat gets wrapped and stuff, \
woohoo!=C3=\r\n=89",
encode_to_str(
"this\u{0}is\u{FF}a=long\rstring\nthat gets \
wrapped and stuff, woohoo!\u{c9}",
)
);
assert_eq!(
"this=00is=C3=BFa=3Dlong=0Dstring=0Athat just fits in a line, woohoo!=C3=89",
encode_to_str(
"this\u{0}is\u{FF}a=long\rstring\nthat just fits \
in a line, woohoo!\u{c9}",
)
);
assert_eq!(
"this=20\r\nhas linebreaks\r\n built right in.",
encode_to_str("this \r\nhas linebreaks\r\n built right in.")
);
// Test that soft line breaks get inserted at the right place
assert_eq!(
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXY",
encode_to_str(
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXY",
)
);
assert_eq!(
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX=\r\nXY",
encode_to_str(
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXY",
)
);
assert_eq!(
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX=\r\nXXY",
encode_to_str(
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXY",
)
);
// Test that soft line breaks don't break up an encoded octet
assert_eq!(
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX=00Y",
encode_to_str(
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\u{0}Y",
)
);
assert_eq!(
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX=\r\n=00Y",
encode_to_str(
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\u{0}Y",
)
);
assert_eq!(
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX=\r\n=00Y",
encode_to_str(
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\u{0}Y",
)
);
assert_eq!(
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX=\r\n=00Y",
encode_to_str(
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\u{0}Y",
)
);
assert_eq!("=0D=3D", encode_to_str("\r="));
assert_eq!("=0D\r\n", encode_to_str("\r\r\n"));
assert_eq!("a=0D\r\nb", encode_to_str("a\r\r\nb"));
assert_eq!("=0D", encode_to_str("\r"));
assert_eq!("=0D=0D", encode_to_str("\r\r"));
assert_eq!("\r\n", encode_to_str("\r\n"));
assert_eq!("trailing spaces =20", encode_to_str("trailing spaces "),);
assert_eq!(
"trailing spaces and crlf =20\r\n",
encode_to_str("trailing spaces and crlf \r\n"),
);
assert_eq!(
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX=\r\n=09",
encode_to_str(
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\t"
),
);
assert_eq!(
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX=\r\n=20\r\n",
encode_to_str("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX \r\n"),
);
}
#[test]
fn test_lower_nibble_to_hex() {
let test_data: &[(u8, char, char)] = &[
(0, '0', '0'),
(1, '0', '1'),
(9, '0', '9'),
(10, '0', 'A'),
(15, '0', 'F'),
(16, '1', '0'),
(255, 'F', 'F'),
];
for &(nr, high, low) in test_data.iter() {
let got_high = lower_nibble_to_hex(nr >> 4);
assert_eq!(high, got_high);
let got_low = lower_nibble_to_hex(nr);
assert_eq!(low, got_low);
}
}
// from https://github.com/staktrace/quoted-printable/issues/13
#[test]
fn test_qp_rt() {
let s = b"foo\r\n";
let qp = encode_to_str(s);
let rt = decode(&qp, ParseMode::Strict).unwrap();
assert_eq!(s.as_slice(), rt.as_slice());
}
#[test]
fn test_binary() {
assert_eq!("foo=0D=0A", encode_binary_to_str("foo\r\n"));
assert_eq!(
"foo\r\n",
lib::String::from_utf8(decode("foo=0D=0A", ParseMode::Strict).unwrap()).unwrap()
);
assert_eq!(
"=0D=0A=0D=0A=0D=0A=0D=0A=0D=0A=0D=0A=0D=0A=0D=0A=0D=0A=0D=0A=0D=0A=0D=0A=0D=\r\n=0A=0D=0A=0D=0A",
encode_binary_to_str("\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n")
);
}
}