Struct AutoEncodingReader 

pub struct AutoEncodingReader<R: Read> { /* private fields */ }

自动检测和转换文本编码的读取器

该读取器使用 uchardet 自动检测输入流的字符编码，并将其实时转换为 UTF-8 编码。 支持多种常见编码格式，包括 GB18030、GBK、BIG5 等。

Implementations

impl<R: Read> AutoEncodingReader<R>

pub fn new_with_fallbacks( reader: R, fallbacks: &[&'static Encoding], ) -> Result<Self, EncodingError>

使用编码检测和后备编码列表创建新的读取器

该方法会读取前 8KB 数据用于编码检测，如果无法检测则尝试后备编码。

参数

• reader: 底层字节流读取器
• fallbacks: 编码检测失败时的后备编码列表（按优先级顺序）

错误

当无法检测到合适的编码时会返回 EncodingError::CharsetError

pub fn new(reader: R) -> Result<Self, EncodingError>

使用默认后备编码列表创建新的读取器

默认后备编码：GB18030, GBK, UTF_8, BIG5（针对中文环境）

pub fn had_replacement_or_cant_map(&self) -> bool

检查解码过程中是否出现了无法映射的字符

返回 true 表示解码过程中使用了替换字符（通常为 �）

Trait Implementations

impl<R: Read> Read for AutoEncodingReader<R>

fn read(&mut self, buffer: &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<'_>) -> 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<'_>) -> 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.

impl<R: Read + Seek> Rewind for AutoEncodingReader<R>

fn try_rewind(&mut self) -> Result<()>

重置当前 I/O 对象到初始位置。

fn try_rebuild(self) -> Result<Self, Error>

where Self: Sized,

消费当前对象，返回一个重置到开头的对象。