Struct Reader 

pub struct Reader<'a> { /* private fields */ }

A filter that strips ASCII Armor from a stream of data.

Implementations

impl<'a> Reader<'a>

pub fn from_buffered_reader<R, M>( reader: R, mode: M, ) -> Result<Reader<'a>, Error>

where R: BufferedReader<Cookie> + 'a, M: Into<Option<ReaderMode>>,

Constructs a new Reader from the given BufferedReader.

pub fn from_reader<R, M>(reader: R, mode: M) -> Reader<'a>

where R: 'a + Read + Send + Sync, M: Into<Option<ReaderMode>>,

Constructs a new Reader from the given io::Reader.

ASCII Armor, designed to protect OpenPGP data in transit, has been a source of problems if the armor structure is damaged. For example, copying data manually from one program to another might introduce or drop newlines.

By default, the reader operates in tolerant mode. It will ignore common formatting errors but the header and footer lines must be intact.

To select stricter mode, specify the kind argument for tolerant mode. In this mode only ASCII Armor blocks with the appropriate header are recognized.

There is also very tolerant mode that is appropriate when reading text that the user cut and pasted into a text area. This mode of operation is CPU intense, particularly on large text files.

Examples

use std::io::{self, Read};
use sequoia_openpgp as openpgp;
use openpgp::Message;
use openpgp::armor::{Reader, ReaderMode};
use openpgp::parse::Parse;

let data = "yxJiAAAAAABIZWxsbyB3b3JsZCE="; // base64 over literal data packet

let mut cursor = io::Cursor::new(&data);
let mut reader = Reader::from_reader(&mut cursor, ReaderMode::VeryTolerant);

let mut buf = Vec::new();
reader.read_to_end(&mut buf)?;

let message = Message::from_bytes(&buf)?;
assert_eq!(message.body().unwrap().body(),
           b"Hello world!");

Or, in strict mode:

use std::io::{self, Result, Read};
use sequoia_openpgp as openpgp;
use openpgp::armor::{Reader, ReaderMode, Kind};

let data =
    "-----BEGIN PGP ARMORED FILE-----

     SGVsbG8gd29ybGQh
     =s4Gu
     -----END PGP ARMORED FILE-----";

let mut cursor = io::Cursor::new(&data);
let mut reader = Reader::from_reader(&mut cursor, ReaderMode::Tolerant(Some(Kind::File)));

let mut content = String::new();
reader.read_to_string(&mut content)?;
assert_eq!(content, "Hello world!");
assert_eq!(reader.kind(), Some(Kind::File));

pub fn from_file<P, M>(path: P, mode: M) -> Result<Reader<'a>, Error>

where P: AsRef<Path>, M: Into<Option<ReaderMode>>,

Creates a Reader from a file.

pub fn from_bytes<M>(bytes: &'a [u8], mode: M) -> Reader<'a>

where M: Into<Option<ReaderMode>>,

Creates a Reader from a buffer.

pub fn kind(&self) -> Option<Kind>

Returns the kind of data this reader is for.

Useful if the kind of data is not known in advance. If the header has not been encountered yet (try reading some data first!), this function returns None.

pub fn headers(&mut self) -> Result<&[(String, String)], Error>

Returns the armored headers.

The tuples contain a key and a value.

Note: if a key occurs multiple times, then there are multiple entries in the vector with the same key; values with the same key are not combined.

Examples

use std::io::{self, Read};
use sequoia_openpgp as openpgp;
use openpgp::armor::{Reader, ReaderMode, Kind};

let data =
    "-----BEGIN PGP ARMORED FILE-----
     First: value
     Header: value

     SGVsbG8gd29ybGQh
     =s4Gu
     -----END PGP ARMORED FILE-----";

let mut cursor = io::Cursor::new(&data);
let mut reader = Reader::from_reader(&mut cursor, ReaderMode::Tolerant(Some(Kind::File)));

let mut content = String::new();
reader.read_to_string(&mut content)?;
assert_eq!(reader.headers()?,
   &[("First".into(), "value".into()),
     ("Header".into(), "value".into())]);

Trait Implementations

impl BufferedReader<Cookie> for Reader<'_>

fn buffer(&self) -> &[u8]

Returns a reference to the internal buffer.

fn data(&mut self, amount: usize) -> Result<&[u8], Error>

Ensures that the internal buffer has at least amount bytes of data, and returns it.

fn data_hard(&mut self, amount: usize) -> Result<&[u8], Error>

Like BufferedReader::data, but returns an error if there is not at least amount bytes available.

fn consume(&mut self, amount: usize) -> &[u8]

Consumes some of the data.

fn data_consume(&mut self, amount: usize) -> Result<&[u8], Error>

A convenience function that combines BufferedReader::data and BufferedReader::consume.

fn data_consume_hard(&mut self, amount: usize) -> Result<&[u8], Error>

A convenience function that effectively combines BufferedReader::data_hard and BufferedReader::consume.

fn get_mut(&mut self) -> Option<&mut dyn BufferedReader<Cookie>>

Returns a mutable reference to the inner BufferedReader, if any.

fn get_ref(&self) -> Option<&dyn BufferedReader<Cookie>>

Returns a reference to the inner BufferedReader, if any.

fn into_inner<'b>( self: Box<Reader<'_>>, ) -> Option<Box<dyn BufferedReader<Cookie> + 'b>>

where Reader<'_>: 'b,

Returns the underlying reader, if any.

fn cookie_set(&mut self, cookie: Cookie) -> Cookie

Sets the BufferedReader’s cookie and returns the old value.

fn cookie_ref(&self) -> &Cookie

Returns a reference to the BufferedReader’s cookie.

fn cookie_mut(&mut self) -> &mut Cookie

Returns a mutable reference to the BufferedReader’s cookie.

fn data_eof(&mut self) -> Result<&[u8], Error>

Returns all of the data until EOF. Like BufferedReader::data, this does not actually consume the data that is read.

fn eof(&mut self) -> bool

Checks whether the end of the stream is reached.

fn consummated(&mut self) -> bool

Checks whether this reader is consummated.

fn read_be_u16(&mut self) -> Result<u16, Error>

A convenience function for reading a 16-bit unsigned integer in big endian format.

fn read_be_u32(&mut self) -> Result<u32, Error>

A convenience function for reading a 32-bit unsigned integer in big endian format.

fn read_to(&mut self, terminal: u8) -> Result<&[u8], Error>

Reads until either terminal is encountered or EOF.

fn drop_until(&mut self, terminals: &[u8]) -> Result<usize, Error>

Discards the input until one of the bytes in terminals is encountered.

fn drop_through( &mut self, terminals: &[u8], match_eof: bool, ) -> Result<(Option<u8>, usize), Error>

Discards the input until one of the bytes in terminals is encountered.

fn steal(&mut self, amount: usize) -> Result<Vec<u8>, Error>

Like BufferedReader::data_consume_hard, but returns the data in a caller-owned buffer.

fn steal_eof(&mut self) -> Result<Vec<u8>, Error>

Like BufferedReader::steal, but instead of stealing a fixed number of bytes, steals all of the data until the end of file.

fn drop_eof(&mut self) -> Result<bool, Error>

Like BufferedReader::steal_eof, but instead of returning the data, the data is discarded.

fn copy(&mut self, sink: &mut dyn Write) -> Result<u64, Error>

Copies data to the given writer returning the copied amount.

fn dump(&self, sink: &mut dyn Write) -> Result<(), Error>

where Self: Sized,

A helpful debugging aid to pretty print a Buffered Reader stack.

fn into_boxed<'a>(self) -> Box<dyn BufferedReader<C> + 'a>

where Self: Sized + 'a,

Boxes the reader.

fn as_boxed<'a>(self) -> Box<dyn BufferedReader<C> + 'a>

where Self: Sized + 'a,

👎Deprecated:

Use into_boxed

Boxes the reader.

impl<'a> Debug for Reader<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<'a> Display for Reader<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Read for Reader<'_>

fn read(&mut self, buf: &mut [u8]) -> Result<usize, Error>

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize, Error>

Like read, except that it reads into a slice of buffers.

fn is_read_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Reader has an efficient read_vectored implementation.

fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>

Reads all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Reads all bytes until EOF in this source, appending them to buf.

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

Reads the exact number of bytes required to fill buf.

fn read_buf(&mut self, buf: BorrowedCursor<'_, u8>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)

Pull some bytes from this source into the specified buffer.

fn read_buf_exact( &mut self, cursor: BorrowedCursor<'_, u8>, ) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)

Reads the exact number of bytes required to fill cursor.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adapter for this instance of Read.

fn bytes(self) -> Bytes<Self>

where Self: Sized,

Transforms this Read instance to an Iterator over its bytes.

fn chain<R>(self, next: R) -> Chain<Self, R>

where R: Read, Self: Sized,

Creates an adapter which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

where Self: Sized,

Creates an adapter which will read at most limit bytes from it.

fn read_array<const N: usize>(&mut self) -> Result<[u8; N], Error>

where Self: Sized,

🔬This is a nightly-only experimental API. (read_array)

Read and return a fixed array of bytes from this source.

fn read_le<T>(&mut self) -> Result<T, Error>

where T: FromEndianBytes, Self: Sized,

🔬This is a nightly-only experimental API. (read_le)

Read and return a type (e.g. an integer) in little-endian order.

fn read_be<T>(&mut self) -> Result<T, Error>

where T: FromEndianBytes, Self: Sized,

🔬This is a nightly-only experimental API. (read_le)

Read and return a type (e.g. an integer) in big-endian order.