Struct MaskingWriter 

pub struct MaskingWriter<W: Write> { /* private fields */ }

A writer that redacts sensitive field values from formatted log output.

Buffers each log line (tracing-subscriber writes complete lines via write_all), applies field-level redaction, then flushes to the inner writer. When the sensitive fields set is empty and no service fields are set, writes pass through directly with no buffering overhead.

Implementations

impl<W: Write> MaskingWriter<W>

pub fn new( inner: W, sensitive_fields: Arc<HashSet<String>>, is_json: bool, ) -> Self

Create a new masking writer wrapping the given writer.

When sensitive_fields is empty, writes pass through with no overhead. Set is_json to true for JSON-format redaction, false for text.

Trait Implementations

impl<W: Write> Drop for MaskingWriter<W>

fn drop(&mut self)

Executes the destructor for this type.

impl<W: Write> Write for MaskingWriter<W>

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

Writes a buffer into this writer, returning how many bytes were written.

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

Flushes this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers.

fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Writer has an efficient write_vectored implementation.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer.

fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)

Attempts to write multiple buffers into this writer.

fn write_fmt(&mut self, args: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adapter for this instance of Write.