Struct EntrySeekableWriter 

pub struct EntrySeekableWriter<'b, W: AsyncWrite + AsyncSeek + Unpin> { /* private fields */ }

An entry writer which streams data to a seekable ZIP output.

Unlike EntryStreamWriter, this writer doesn’t use data descriptors. Instead, it writes a placeholder local file header, streams the entry data, then seeks back and patches the header with the final CRC and sizes.

If the final compressed or uncompressed size requires Zip64 but no Zip64 size fields were reserved up front, closing this writer will fail. Use ZipEntryBuilder::size to reserve those fields when the size is known to exceed the non-Zip64 limit, or use ZipFileWriter::write_entry_stream for fully unknown Zip64-sized entries.

Implementations

impl<'b, W: AsyncWrite + AsyncSeek + Unpin> EntrySeekableWriter<'b, W>

pub async fn close(self) -> Result<()>

Consumes this entry writer and completes all closing tasks.

This includes:

• Finalising the CRC32 hash value for the written data.
• Calculating the compressed and uncompressed byte sizes.
• Seeking back to patch the local file header.
• Constructing a central directory header.
• Pushing that central directory header to the ZipFileWriter’s store.

Failure to call this function before going out of scope would result in a corrupted ZIP file.

Trait Implementations

impl<'a, W: AsyncWrite + AsyncSeek + Unpin> AsyncWrite for EntrySeekableWriter<'a, W>

fn poll_write( self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &[u8], ) -> Poll<Result<usize, Error>>

Attempt to write bytes from buf into the object.

fn poll_flush( self: Pin<&mut Self>, cx: &mut Context<'_>, ) -> Poll<Result<(), Error>>

Attempt to flush the object, ensuring that any buffered data reach their destination.

fn poll_close( self: Pin<&mut Self>, cx: &mut Context<'_>, ) -> Poll<Result<(), Error>>

Attempt to close the object.

fn poll_write_vectored( self: Pin<&mut Self>, cx: &mut Context<'_>, bufs: &[IoSlice<'_>], ) -> Poll<Result<usize, Error>>

Attempt to write bytes from bufs into the object using vectored IO operations.