优化日志获取

src/utils/file.js

@@ -142,7 +142,7 @@ async function readLastNLines(dirPath, filePathList, n) {
             // let lines = content.trim().split("\n");
 
             //新版本：流式读取和逐行处理
-            const lines = await readLines(filepath, n - count);
+            const lines = await readLinesFromEnd(filepath, n - count);
             // logger.info("日:" + lines)
             fileList.push({
                 filePath: item,
@@ -167,6 +167,47 @@ async function readLastNLines(dirPath, filePathList, n) {
     }
 }
 
+
+async function readLinesFromEnd(filePath, maxLines) {
+    const lines = [];
+    const fileSize = fs.statSync(filePath).size;
+    const chunkSize = 1024; // 每次读取的块大小
+    let buffer = '';
+    let position = fileSize - chunkSize;
+
+    const fileStream = fs.createReadStream(filePath, {
+        start: Math.max(position, 0),
+        end: fileSize
+    });
+
+    for await (const chunk of fileStream) {
+        buffer = chunk + buffer;
+        let lineEndIndex = buffer.length;
+
+        while (lineEndIndex >= 0 && lines.length < maxLines) {
+            const lineStartIndex = buffer.lastIndexOf('\n', lineEndIndex - 1);
+            if (lineStartIndex === -1) {
+                break;
+            }
+            const line = buffer.substring(lineStartIndex + 1, lineEndIndex).trim();
+            if (line) {
+                lines.push(line);
+            }
+            lineEndIndex = lineStartIndex;
+        }
+
+        if (lines.length >= maxLines) {
+            break;
+        }
+
+        position -= chunkSize;
+        if (position < 0) {
+            position = 0;
+        }
+    }
+
+    return lines;
+}
  async function readLines(filePath, maxLines) {
      const fileStream = fs.createReadStream(filePath);
      const rl = readline.createInterface({