AskaEth
bc41dfcf7d
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Rust 原生单文件 Minecraft 启动器：CLI 完整可用（install/launch/accounts/java/diagnose/agent）， MCP server 接入外部 Agent 工具，GUI 开发中。
115 lines
3.5 KiB
Rust
115 lines
3.5 KiB
Rust
//! 日志级别猜测与“关键行”判定。
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//!
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//! 平移自 `analyse/02` §6.4（`Log4jLevel.guessLevel`）：先认 log4j 注入的
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//! `[HH:mm:ss] [thread/LEVEL]` 格式，再退到 JUL 的 `[INFO]` 形态；`stderr` 一律当
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//! ERROR（`[authlib-injector]` 例外）。
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//!
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//! 目的有两个：给事件流打 `level`，以及让环形缓冲能“关键行永久保留”
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//! （`analyse/02` §7.10-3：2000 行截断会把根因行挤掉）。
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/// 日志级别（认知顺序：Error 最严重）。
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#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
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pub enum Level {
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/// 错误。
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Error,
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/// 警告。
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Warn,
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/// 信息。
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Info,
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/// 调试。
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Debug,
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/// 无法判断。
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Unknown,
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}
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impl Level {
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/// 事件流里用的字符串形式。
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pub fn as_str(self) -> &'static str {
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match self {
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Self::Error => "error",
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Self::Warn => "warn",
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Self::Info => "info",
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Self::Debug => "debug",
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Self::Unknown => "unknown",
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}
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}
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/// 是否错误级（退出分析筛行用）。
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pub fn is_error(self) -> bool {
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self == Self::Error
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}
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}
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/// 猜测一行日志的级别。
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pub fn guess(is_stderr: bool, line: &str) -> Level {
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let trimmed = line.trim_start();
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if is_stderr {
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// authlib-injector 往 stderr 打的都是正常信息（`analyse/02` §6.4）。
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if trimmed.starts_with("[authlib-injector]") {
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return Level::Info;
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}
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return Level::Error;
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}
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if let Some(level) = log4j_level(trimmed) {
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return level;
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}
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jul_level(trimmed).unwrap_or(Level::Unknown)
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}
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/// 是否“关键行”：命中这些特征的行不随环形淘汰（`Exception|Error|Caused by|OutOfMemory`）。
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pub fn is_key_line(line: &str) -> bool {
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let lower = line.to_ascii_lowercase();
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lower.contains("exception")
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|| lower.contains("error")
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|| lower.contains("caused by")
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|| lower.contains("outofmemory")
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|| lower.contains("fatal")
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}
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/// 从 `[12:34:56] [Render thread/INFO]: ...` 里取级别。
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///
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/// 逐段扫描方括号内容，取第一段形如 `<线程名>/<LEVEL>` 的级别，最多看 3 段。
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fn log4j_level(line: &str) -> Option<Level> {
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let mut rest = line;
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for _ in 0..3 {
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let open = rest.find('[')?;
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let tail = &rest[open + 1..];
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let close = tail.find(']')?;
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let segment = &tail[..close];
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if let Some(slash) = segment.rfind('/') {
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if let Some(level) = level_from_name(&segment[slash + 1..]) {
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return Some(level);
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}
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}
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rest = &tail[close + 1..];
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}
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None
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}
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fn level_from_name(name: &str) -> Option<Level> {
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match name.trim() {
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"ERROR" | "FATAL" => Some(Level::Error),
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"WARN" | "WARNING" => Some(Level::Warn),
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"INFO" | "NOTICE" => Some(Level::Info),
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"DEBUG" | "TRACE" | "FINE" | "FINER" | "FINEST" => Some(Level::Debug),
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_ => None,
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}
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}
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/// JUL/裸标记形态：`[INFO]`、`[SEVERE]`、`[WARNING]`。
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fn jul_level(line: &str) -> Option<Level> {
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const MARKERS: &[(&str, Level)] = &[
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("[SEVERE]", Level::Error),
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("[ERROR]", Level::Error),
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("[WARNING]", Level::Warn),
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("[WARN]", Level::Warn),
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("[INFO]", Level::Info),
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("[DEBUG]", Level::Debug),
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("[FINE]", Level::Debug),
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];
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MARKERS
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.iter()
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.find(|(marker, _)| line.starts_with(marker))
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.map(|(_, level)| *level)
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}
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