freeswitch-log-parser

Rust library for parsing FreeSWITCH log files. Three-layer streaming architecture with zero dependencies and no regex.

Layers

Layer 1: parse_line()       &str -> RawLine        (stateless, zero-alloc)
Layer 2: LogStream          Iterator -> LogEntry    (structural state machine)
Layer 3: SessionTracker     LogStream -> EnrichedEntry (per-UUID state)

Layer 1 classifies individual log lines into five formats (Full, System, UuidContinuation, BareContinuation, Truncated) and extracts positional fields (UUID, timestamp, log level, source, message).

Layer 2 groups continuation lines, detects block boundaries (CHANNEL_DATA dumps, SDP bodies), reassembles multi-line variable values, and classifies messages into semantic types (Execute, Dialplan, Variable, ChannelField, SdpMarker, StateChange, General). Every entry carries both a typed Block and raw attached lines.

Layer 3 maintains per-UUID session state (dialplan context, channel state, learned variables) and propagates it across entries. Yields EnrichedEntry with a SessionSnapshot alongside the raw LogEntry.

Each layer wraps the previous and can be used independently.

Usage

use std::io::{self, BufRead};
use freeswitch_log_parser::{LogStream, SessionTracker};

let lines = io::stdin().lock().lines().map(|l| l.unwrap());
let stream = LogStream::new(lines);

for enriched in SessionTracker::new(stream) {
    let entry = &enriched.entry;
    println!("{} {} {}", entry.uuid, entry.message_kind, entry.message);
    if let Some(session) = &enriched.session {
        if let Some(ctx) = &session.dialplan_context {
            println!("  context: {ctx}");
        }
    }
}

Unclassified data tracking

Lines that can't be fully classified are tracked, never silently dropped:

use freeswitch_log_parser::{LogStream, UnclassifiedTracking};

let mut stream = LogStream::new(lines)
    .unclassified_tracking(UnclassifiedTracking::TrackLines);

for entry in stream.by_ref() { /* ... */ }

let stats = stream.stats();
eprintln!("{} lines, {} unclassified",
    stats.lines_processed, stats.lines_unclassified);

License

LGPL-2.1-or-later