Struct qiniu_download::RangeReader[−][src]

pub struct RangeReader { /* fields omitted */ }

Expand description

对象范围下载器

Implementations

impl RangeReader[src]

pub fn builder(
    bucket: impl Into<String>, 
    key: impl Into<String>, 
    credential: Credential, 
    io_urls: Vec<String>
) -> RangeReaderBuilder

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创建范围下载构建器

pub fn from_config(key: impl Into<String>, config: &Config) -> Self[src]

从配置创建范围下载器

Arguments

key - 对象名称
config - 下载配置

pub fn from_env(key: impl Into<String>) -> Option<Self>[src]

从环境变量创建范围下载器

Arguments

key - 对象名称

impl RangeReader[src]

pub fn read_multi_ranges(
    &self, 
    ranges: &[(u64, u64)]
) -> IOResult<Vec<RangePart>>

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读取文件的多个区域，返回每个区域对应的数据

Arguments

range - 区域列表，每个区域有开始偏移量和区域长度组成

pub fn exist(&self) -> IOResult<bool>[src]

判定当前对象是否存在

pub fn file_size(&self) -> IOResult<u64>[src]

获取当前对象的文件大小

pub fn download(&self) -> IOResult<Vec<u8>>[src]

下载当前对象到内存缓冲区中

pub fn download_to(&self, writer: &mut dyn WriteSeek) -> IOResult<u64>[src]

下载当前对象到指定输出流中

pub fn read_last_bytes(&self, buf: &mut [u8]) -> IOResult<(u64, u64)>[src]

下载对象的最后指定个字节到缓冲区中，返回实际下载的字节数和整个文件的大小

Trait Implementations

impl Debug for RangeReader[src]

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

Formats the value using the given formatter. Read more

impl ReadAt for RangeReader[src]

fn read_at(&self, pos: u64, buf: &mut [u8]) -> IOResult<usize>[src]

Read bytes from an offset in this source into a buffer, returning how many bytes were read. Read more

fn read_exact_at(&self, pos: u64, buf: &mut [u8]) -> Result<(), Error>[src]

Read the exact number of bytes required to fill buf, from an offset. Read more

Auto Trait Implementations

impl !RefUnwindSafe for RangeReader

impl Send for RangeReader

impl Sync for RangeReader

impl Unpin for RangeReader

impl !UnwindSafe for RangeReader

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized,

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pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
    T: ?Sized,

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pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
    T: ?Sized,

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pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

impl<T> Conv for T[src]

fn conv<T>(self) -> T where
    Self: Into<T>,

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Converts self into T using Into<T>. Read more

impl<T> From<T> for T[src]

pub fn from(t: T) -> T[src]

Performs the conversion.

impl<T> Instrument for T[src]

fn instrument(self, span: Span) -> Instrumented<Self>[src]

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

fn in_current_span(self) -> Instrumented<Self>[src]

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

impl<T, U> Into<U> for T where
    U: From<T>,

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pub fn into(self) -> U[src]

Performs the conversion.

impl<T> Pipe for T where
    T: ?Sized,

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fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> R[src]

Pipes by value. This is generally the method you want to use. Read more

fn pipe_ref<'a, R>(&'a self, func: impl FnOnce(&'a Self) -> R) -> R where
    R: 'a,

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Borrows self and passes that borrow into the pipe function. Read more

fn pipe_ref_mut<'a, R>(&'a mut self, func: impl FnOnce(&'a mut Self) -> R) -> R where
    R: 'a,

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Mutably borrows self and passes that borrow into the pipe function. Read more

fn pipe_borrow<'a, B, R>(&'a self, func: impl FnOnce(&'a B) -> R) -> R where
    Self: Borrow<B>,
    R: 'a,
    B: 'a + ?Sized,

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Borrows self, then passes self.borrow() into the pipe function. Read more

fn pipe_borrow_mut<'a, B, R>(
    &'a mut self, 
    func: impl FnOnce(&'a mut B) -> R
) -> R where
    Self: BorrowMut<B>,
    R: 'a,
    B: 'a + ?Sized,

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Mutably borrows self, then passes self.borrow_mut() into the pipe function. Read more

fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> R where
    Self: AsRef<U>,
    R: 'a,
    U: 'a + ?Sized,

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Borrows self, then passes self.as_ref() into the pipe function.

fn pipe_as_mut<'a, U, R>(&'a mut self, func: impl FnOnce(&'a mut U) -> R) -> R where
    Self: AsMut<U>,
    R: 'a,
    U: 'a + ?Sized,

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Mutably borrows self, then passes self.as_mut() into the pipe function. Read more

fn pipe_deref<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R where
    Self: Deref<Target = T>,
    R: 'a,
    T: 'a + ?Sized,

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Borrows self, then passes self.deref() into the pipe function.

fn pipe_deref_mut<'a, T, R>(
    &'a mut self, 
    func: impl FnOnce(&'a mut T) -> R
) -> R where
    Self: DerefMut<Target = T> + Deref,
    R: 'a,
    T: 'a + ?Sized,

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Mutably borrows self, then passes self.deref_mut() into the pipe function. Read more

impl<R> ReadBytesExt for R where
    R: ReadAt,

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fn read_u8_at(&self, pos: u64) -> Result<u8, Error>[src]

Reads an unsigned 8-bit integer at an offset.

fn read_i8_at(&self, pos: u64) -> Result<i8, Error>[src]

Reads a signed 8-bit integer at an offset.

fn read_u16_at<T>(&self, pos: u64) -> Result<u16, Error> where
    T: ByteOrder,

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Reads an unsigned 16-bit integer at an offset.

fn read_i16_at<T>(&self, pos: u64) -> Result<i16, Error> where
    T: ByteOrder,

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Reads a signed 16-bit integer at an offset.

fn read_u32_at<T>(&self, pos: u64) -> Result<u32, Error> where
    T: ByteOrder,

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Reads an unsigned 32-bit integer at an offset.

fn read_i32_at<T>(&self, pos: u64) -> Result<i32, Error> where
    T: ByteOrder,

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Reads a signed 32-bit integer at an offset.

fn read_u64_at<T>(&self, pos: u64) -> Result<u64, Error> where
    T: ByteOrder,

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Reads an unsigned 64-bit integer at an offset.

fn read_i64_at<T>(&self, pos: u64) -> Result<i64, Error> where
    T: ByteOrder,

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Reads a signed 64-bit integer at an offset.

fn read_uint_at<T>(&self, pos: u64, nbytes: usize) -> Result<u64, Error> where
    T: ByteOrder,

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Reads an unsigned nbytes-bit integer at an offset.

fn read_int_at<T>(&self, pos: u64, nbytes: usize) -> Result<i64, Error> where
    T: ByteOrder,

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Reads a signed nbytes-bit integer at an offset.

fn read_f32_at<T>(&self, pos: u64) -> Result<f32, Error> where
    T: ByteOrder,

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Reads a single-precision floating point number at an offset.

fn read_f64_at<T>(&self, pos: u64) -> Result<f64, Error> where
    T: ByteOrder,

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Reads a double-precision floating point number at an offset.

impl<T> Same<T> for T

type Output = T

Should always be Self

impl<T> Tap for T[src]

fn tap(self, func: impl FnOnce(&Self)) -> Self[src]

Immutable access to a value. Read more

fn tap_mut(self, func: impl FnOnce(&mut Self)) -> Self[src]

Mutable access to a value. Read more

fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self where
    Self: Borrow<B>,
    B: ?Sized,

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Immutable access to the Borrow of a value. Read more

fn tap_borrow_mut<B>(self, func: impl FnOnce(&mut B)) -> Self where
    Self: BorrowMut<B>,
    B: ?Sized,

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Mutable access to the BorrowMut of a value. Read more

fn tap_ref<R>(self, func: impl FnOnce(&R)) -> Self where
    Self: AsRef<R>,
    R: ?Sized,

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Immutable access to the AsRef<R> view of a value. Read more

fn tap_ref_mut<R>(self, func: impl FnOnce(&mut R)) -> Self where
    Self: AsMut<R>,
    R: ?Sized,

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Mutable access to the AsMut<R> view of a value. Read more

fn tap_deref<T>(self, func: impl FnOnce(&T)) -> Self where
    Self: Deref<Target = T>,
    T: ?Sized,

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Immutable access to the Deref::Target of a value. Read more

fn tap_deref_mut<T>(self, func: impl FnOnce(&mut T)) -> Self where
    Self: DerefMut<Target = T> + Deref,
    T: ?Sized,

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Mutable access to the Deref::Target of a value. Read more

fn tap_dbg(self, func: impl FnOnce(&Self)) -> Self[src]

Calls .tap() only in debug builds, and is erased in release builds.

fn tap_mut_dbg(self, func: impl FnOnce(&mut Self)) -> Self[src]

Calls .tap_mut() only in debug builds, and is erased in release builds. Read more

fn tap_borrow_dbg<B>(self, func: impl FnOnce(&B)) -> Self where
    Self: Borrow<B>,
    B: ?Sized,

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Calls .tap_borrow() only in debug builds, and is erased in release builds. Read more

fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self where
    Self: BorrowMut<B>,
    B: ?Sized,

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Calls .tap_borrow_mut() only in debug builds, and is erased in release builds. Read more

fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self where
    Self: AsRef<R>,
    R: ?Sized,

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Calls .tap_ref() only in debug builds, and is erased in release builds. Read more

fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self where
    Self: AsMut<R>,
    R: ?Sized,

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Calls .tap_ref_mut() only in debug builds, and is erased in release builds. Read more

fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self where
    Self: Deref<Target = T>,
    T: ?Sized,

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Calls .tap_deref() only in debug builds, and is erased in release builds. Read more

fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self where
    Self: DerefMut<Target = T> + Deref,
    T: ?Sized,

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Calls .tap_deref_mut() only in debug builds, and is erased in release builds. Read more

impl<T> TryConv for T[src]

fn try_conv<T>(self) -> Result<T, Self::Error> where
    Self: TryInto<T>,

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Attempts to convert self into T using TryInto<T>. Read more

impl<T, U> TryFrom<U> for T where
    U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.

pub fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>[src]

Performs the conversion.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>,

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type Error = >::Error

The type returned in the event of a conversion error.

pub fn try_into(self) -> Result<U, >::Error>[src]

Performs the conversion.

impl<V, T> VZip<V> for T where
    V: MultiLane<T>,

pub fn vzip(self) -> V