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Struct cacache::SyncReader

source · 
pub struct SyncReader { /* private fields */ }
Expand description

File handle for reading data synchronously.

Make sure to call get.check() when done reading to verify that the extracted data passes integrity verification.

Implementations§

Checks that data read from disk passes integrity checks. Returns the algorithm that was used verified the data. Should be called only after all data has been read from disk.

Example
use std::io::Read;

fn main() -> cacache::Result<()> {
    let mut fd = cacache::SyncReader::open("./my-cache", "my-key")?;
    let mut str = String::new();
    fd.read_to_string(&mut str).expect("Failed to read to string");
    // Remember to check that the data you got was correct!
    fd.check()?;
    Ok(())
}

Opens a new synchronous file handle into the cache, looking it up in the index using key.

Example
use std::io::Read;

fn main() -> cacache::Result<()> {
    let mut fd = cacache::SyncReader::open("./my-cache", "my-key")?;
    let mut str = String::new();
    fd.read_to_string(&mut str).expect("Failed to parse string");
    // Remember to check that the data you got was correct!
    fd.check()?;
    Ok(())
}

Opens a new synchronous file handle into the cache, based on its integrity address.

Example
use std::io::Read;

fn main() -> cacache::Result<()> {
    let sri = cacache::write_sync("./my-cache", "key", b"hello world")?;
    let mut fd = cacache::SyncReader::open_hash("./my-cache", sri)?;
    let mut str = String::new();
    fd.read_to_string(&mut str).expect("Failed to read to string");
    // Remember to check that the data you got was correct!
    fd.check()?;
    Ok(())
}

Trait Implementations§

Pull some bytes from this source into the specified buffer, returning how many bytes were read. Read more
Like read, except that it reads into a slice of buffers. Read more
🔬This is a nightly-only experimental API. (can_vector)
Determines if this Reader has an efficient read_vectored implementation. Read more
Read all bytes until EOF in this source, placing them into buf. Read more
Read all bytes until EOF in this source, appending them to buf. Read more
Read the exact number of bytes required to fill buf. Read more
🔬This is a nightly-only experimental API. (read_buf)
Pull some bytes from this source into the specified buffer. Read more
🔬This is a nightly-only experimental API. (read_buf)
Read the exact number of bytes required to fill cursor. Read more
Creates a “by reference” adaptor for this instance of Read. Read more
Transforms this Read instance to an Iterator over its bytes. Read more
Creates an adapter which will chain this stream with another. Read more
Creates an adapter which will read at most limit bytes from it. Read more

Auto Trait Implementations§

Blanket Implementations§

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Reads an unsigned 8 bit integer from the underlying reader. Read more
Reads a signed 8 bit integer from the underlying reader. Read more
Reads an unsigned 16 bit integer from the underlying reader. Read more
Reads a signed 16 bit integer from the underlying reader. Read more
Reads an unsigned 24 bit integer from the underlying reader. Read more
Reads a signed 24 bit integer from the underlying reader. Read more
Reads an unsigned 32 bit integer from the underlying reader. Read more
Reads a signed 32 bit integer from the underlying reader. Read more
Reads an unsigned 48 bit integer from the underlying reader. Read more
Reads a signed 48 bit integer from the underlying reader. Read more
Reads an unsigned 64 bit integer from the underlying reader. Read more
Reads a signed 64 bit integer from the underlying reader. Read more
Reads an unsigned 128 bit integer from the underlying reader. Read more
Reads a signed 128 bit integer from the underlying reader. Read more
Reads an unsigned n-bytes integer from the underlying reader. Read more
Reads a signed n-bytes integer from the underlying reader. Read more
Reads an unsigned n-bytes integer from the underlying reader.
Reads a signed n-bytes integer from the underlying reader.
Reads a IEEE754 single-precision (4 bytes) floating point number from the underlying reader. Read more
Reads a IEEE754 double-precision (8 bytes) floating point number from the underlying reader. Read more
Reads a sequence of unsigned 16 bit integers from the underlying reader. Read more
Reads a sequence of unsigned 32 bit integers from the underlying reader. Read more
Reads a sequence of unsigned 64 bit integers from the underlying reader. Read more
Reads a sequence of unsigned 128 bit integers from the underlying reader. Read more
Reads a sequence of signed 8 bit integers from the underlying reader. Read more
Reads a sequence of signed 16 bit integers from the underlying reader. Read more
Reads a sequence of signed 32 bit integers from the underlying reader. Read more
Reads a sequence of signed 64 bit integers from the underlying reader. Read more
Reads a sequence of signed 128 bit integers from the underlying reader. Read more
Reads a sequence of IEEE754 single-precision (4 bytes) floating point numbers from the underlying reader. Read more
👎Deprecated since 1.2.0: please use read_f32_into instead
DEPRECATED. Read more
Reads a sequence of IEEE754 double-precision (8 bytes) floating point numbers from the underlying reader. Read more
👎Deprecated since 1.2.0: please use read_f64_into instead
DEPRECATED. Read more
Should always be Self
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.