Struct MultiGzDecoder 

pub struct MultiGzDecoder<R>(/* private fields */);

A gzip streaming decoder that decodes a gzip file that may have multiple members.

This structure implements a Read interface. When read from, it reads compressed data from the underlying BufRead and provides the uncompressed data.

A gzip file consists of a series of members concatenated one after another. MultiGzDecoder decodes all members from the data and only returns Ok(0) when the underlying reader does. For a file, this reads to the end of the file.

To handle members separately, see GzDecoder or read more in the introduction.

Examples

use std::io::prelude::*;
use std::io;
use flate2::bufread::MultiGzDecoder;

// Uncompresses a Gz Encoded vector of bytes and returns a string or error
// Here &[u8] implements BufRead

fn decode_reader(bytes: Vec<u8>) -> io::Result<String> {
   let mut gz = MultiGzDecoder::new(&bytes[..]);
   let mut s = String::new();
   gz.read_to_string(&mut s)?;
   Ok(s)
}

Implementations

impl<R: BufRead> MultiGzDecoder<R>

pub fn new(r: R) -> MultiGzDecoder<R>

Creates a new decoder from the given reader, immediately parsing the (first) gzip header. If the gzip stream contains multiple members all will be decoded.

impl<R> MultiGzDecoder<R>

pub fn header(&self) -> Option<&GzHeader>

Returns the current header associated with this stream, if it’s valid

pub fn get_ref(&self) -> &R

Acquires a reference to the underlying reader.

pub fn get_mut(&mut self) -> &mut R

Acquires a mutable reference to the underlying stream.

The underlying reader may be mutated as long as its unread input and current position are preserved for subsequent reads by this decoder.

To process a new stream, wait for this decoder to reach EOF and create a new decoder; replacing the reader directly does not reset it.

pub fn into_inner(self) -> R

Consumes this decoder, returning the underlying reader.

Trait Implementations

impl<R: Debug> Debug for MultiGzDecoder<R>

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

Formats the value using the given formatter.

impl<R: BufRead> Read for MultiGzDecoder<R>

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

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.