codecentric · vetri15 · May 2, 2026 · May 2, 2026 · May 3, 2026
@@ -23,7 +23,7 @@ import axios, {
   registerErrorToastInterceptor,
 } from '../utils/axios';
 import waitForPolyfill from '../utils/eventsource-polyfill';
-import logtail from '../utils/logtail';
+import logtail, { getLogfileWindowMetadata } from '../utils/logtail';
 import uri from '../utils/uri';
 
 import { useSbaConfig } from '@/sba-config';
@@ -417,6 +417,25 @@ class Instance {
     );
   }
 
+  async fetchLogfileRange(start: number, end: number): Promise<LogfileRange> {
+    const response = await this.axios.get(uri`actuator/logfile`, {
+      responseType: 'text',
+      headers: {
+        Accept: 'text/plain',
+        Range: `bytes=${start}-${end}`,
+      },
+    });
+    const metadata = getLogfileWindowMetadata(response);
+
+    return {
+      data: response.data,
+      totalBytes: metadata.totalBytes,
+      windowStart: metadata.windowStart,
+      windowEnd: metadata.windowEnd,
+      status: response.status,
+    };
+  }
+
   async listMBeans() {
     return this.axios.get(uri`actuator/jolokia/list`, {
       headers: { Accept: 'application/json' },
@@ -544,6 +563,14 @@ type Endpoint = {
   url: string;
 };
 
+export type LogfileRange = {
+  data: string;
+  totalBytes: number;
+  windowStart: number;
+  windowEnd: number;
+  status: number;
+};
+
 export const DOWN_STATES = ['OUT_OF_SERVICE', 'DOWN', 'OFFLINE', 'RESTRICTED'];
 export const UP_STATES = ['UP'];
 export const UNKNOWN_STATES = ['UNKNOWN'];
@@ -15,7 +15,39 @@
  */
 import { EMPTY, Observable, catchError, concatMap, of, timer } from './rxjs';
 
-export default (getFn, interval, initialSize = 300 * 1024) => {
+export const DEFAULT_LOGFILE_CHUNK_SIZE = 300 * 1024;
+
+const parseInteger = (value, fallback) => {
+  const parsed = parseInt(value, 10);
+  return Number.isNaN(parsed) ? fallback : parsed;
+};
+
+export const getLogfileWindowMetadata = (response) => {
+  const contentLength = response.data.length;
+  const contentRange = response.headers.get('content-range');
+  const rangeMatch = contentRange?.match(/^bytes\s+(\d+)-(\d+)\/(\d+|\*)$/i);
+
+  if (rangeMatch) {
+    return {
+      windowStart: parseInteger(rangeMatch[1], 0),
+      windowEnd: parseInteger(rangeMatch[2], Math.max(contentLength - 1, 0)),
+      totalBytes: parseInteger(rangeMatch[3], contentLength),
+    };
+  }
+
+  const totalBytes = parseInteger(
+    response.headers.get('content-length'),
+    contentLength,
+  );
+
+  return {
+    windowStart: 0,
+    windowEnd: Math.max(contentLength - 1, 0),
+    totalBytes,
+  };
+};
+
+export default (getFn, interval, initialSize = DEFAULT_LOGFILE_CHUNK_SIZE) => {
   let range = `bytes=-${initialSize}`;
   let size = 0;
 
@@ -38,16 +70,21 @@ export default (getFn, interval, initialSize = 300 * 1024) => {
     concatMap((response) => {
       let initial = size === 0;
       const contentLength = response.data.length;
+      let windowStart = 0;
+      let windowEnd = Math.max(contentLength - 1, 0);
 
       if (response.status === 200) {
         if (!initial) {
           throw 'Expected 206 - Partial Content on subsequent requests.';
         }
         size = contentLength;
-        range = `bytes=${size - 1}-`;
+        range = `bytes=${Math.max(size - 1, 0)}-`;
       } else if (response.status === 206) {
-        size = parseInt(response.headers['content-range'].split('/')[1]);
-        range = `bytes=${size - 1}-`;
+        const metadata = getLogfileWindowMetadata(response);
+        size = metadata.totalBytes;
+        windowStart = metadata.windowStart;
+        windowEnd = metadata.windowEnd;
+        range = `bytes=${Math.max(size - 1, 0)}-`;
       } else if (response.status === 416) {
         size = 0;
         range = `bytes=-${initialSize}`;
@@ -77,6 +114,8 @@ export default (getFn, interval, initialSize = 300 * 1024) => {
             totalBytes: size,
             skipped,
             addendum,
+            windowStart,
+            windowEnd,
           })
         : EMPTY;
     }),

@@ -3,7 +3,12 @@
     "logfile": {
       "label": "Log",
       "download": "Herunterladen",
-      "wrap_lines": "Zeilen umbrechen"
+      "wrap_lines": "Zeilen umbrechen",
+      "page_up": "Seite nach oben",
+      "page_down": "Seite nach unten",
+      "previous_chunk": "Vorheriger Abschnitt",
+      "next_chunk": "Nächster Abschnitt",
+      "resume_follow": "Live-Ansicht fortsetzen"
     }
   }
 }
@@ -3,7 +3,12 @@
     "logfile": {
       "label": "Logfile",
       "download": "Download",
-      "wrap_lines": "Wrap lines"
+      "wrap_lines": "Wrap lines",
+      "page_up": "Page up",
+      "page_down": "Page down",
+      "previous_chunk": "Previous chunk",
+      "next_chunk": "Next chunk",
+      "resume_follow": "Resume follow"
     }
   }
 }
@@ -3,8 +3,12 @@
     "logfile": {
       "label": "Archivo de log",
       "download": "Descargar",
-
-      "wrap_lines": "Ajustar líneas"
+      "wrap_lines": "Ajustar líneas",
+      "page_up": "Subir página",
+      "page_down": "Bajar página",
+      "previous_chunk": "Fragmento anterior",
+      "next_chunk": "Fragmento siguiente",
+      "resume_follow": "Reanudar seguimiento"
     }
   }
 }
@@ -2,7 +2,13 @@
   "instances": {
     "logfile": {
       "label": "Fichier de log",
-      "download": "Téléchargement"
+      "download": "Téléchargement",
+      "wrap_lines": "Retour à la ligne",
+      "page_up": "Page vers le haut",
+      "page_down": "Page vers le bas",
+      "previous_chunk": "Segment précédent",
+      "next_chunk": "Segment suivant",
+      "resume_follow": "Reprendre le suivi"
     }
   }
 }
@@ -2,7 +2,13 @@
   "instances": {
     "logfile": {
       "label": "Annálaskrá",
-      "download": "Niðurhal"
+      "download": "Niðurhal",
+      "wrap_lines": "Línuskipting",
+      "page_up": "Síða upp",
+      "page_down": "Síða niður",
+      "previous_chunk": "Fyrri hluti",
+      "next_chunk": "Næsti hluti",
+      "resume_follow": "Fylgja aftur"
     }
   }
 }
@@ -2,7 +2,13 @@
   "instances": {
     "logfile": {
       "label": "로그파일",
-      "download": "다운로드"
+      "download": "다운로드",
+      "wrap_lines": "줄 바꿈",
+      "page_up": "페이지 위로",
+      "page_down": "페이지 아래로",
+      "previous_chunk": "이전 구간",
+      "next_chunk": "다음 구간",
+      "resume_follow": "실시간 추적 재개"
     }
   }
 }
@@ -2,7 +2,13 @@
   "instances": {
     "logfile": {
       "label": "Arquivo de Log",
-      "download": "Download"
+      "download": "Download",
+      "wrap_lines": "Quebrar linhas",
+      "page_up": "Subir página",
+      "page_down": "Descer página",
+      "previous_chunk": "Trecho anterior",
+      "next_chunk": "Próximo trecho",
+      "resume_follow": "Retomar acompanhamento"
     }
   }
 }
@@ -2,7 +2,13 @@
   "instances": {
     "logfile": {
       "label": "Лог-файл",
-      "download": "Загрузить"
+      "download": "Загрузить",
+      "wrap_lines": "Перенос строк",
+      "page_up": "Страница вверх",
+      "page_down": "Страница вниз",
+      "previous_chunk": "Предыдущий фрагмент",
+      "next_chunk": "Следующий фрагмент",
+      "resume_follow": "Возобновить слежение"
     }
   }
 }
@@ -2,7 +2,13 @@
   "instances": {
     "logfile": {
       "label": "日志文件",
-      "download": "下载"
+      "download": "下载",
+      "wrap_lines": "自动换行",
+      "page_up": "向上翻页",
+      "page_down": "向下翻页",
+      "previous_chunk": "上一段",
+      "next_chunk": "下一段",
+      "resume_follow": "恢复跟踪"
     }
   }
 }
@@ -3,7 +3,12 @@
     "logfile": {
       "label": "日誌檔案",
       "download": "下載",
-      "wrap_lines": "自動換行"
+      "wrap_lines": "自動換行",
+      "page_up": "向上翻頁",
+      "page_down": "向下翻頁",
+      "previous_chunk": "上一段",
+      "next_chunk": "下一段",
+      "resume_follow": "恢復追蹤"
     }
   }
 }