Add image index and pdf parse (#3956)

* feat: think tag parse

* feat: parse think tag test

* feat: pdf parse ux

* feat: doc2x parse

* perf: rewrite training mode setting

* feat: image parse queue

* perf: image index

* feat: image parse process

* feat: add init sh

* fix: ts

packages/service/common/file/image/utils.ts

@@ -0,0 +1,27 @@
+import axios from 'axios';
+import { addLog } from '../../system/log';
+import { serverRequestBaseUrl } from '../../api/serverRequest';
+import { getFileContentTypeFromHeader, guessBase64ImageType } from '../utils';
+
+export const getImageBase64 = async (url: string) => {
+  addLog.debug(`Load image to base64: ${url}`);
+
+  try {
+    const response = await axios.get(url, {
+      baseURL: serverRequestBaseUrl,
+      responseType: 'arraybuffer',
+      proxy: false
+    });
+
+    const base64 = Buffer.from(response.data, 'binary').toString('base64');
+    const imageType =
+      getFileContentTypeFromHeader(response.headers['content-type']) ||
+      guessBase64ImageType(base64);
+
+    return `data:${imageType};base64,${base64}`;
+  } catch (error) {
+    addLog.debug(`Load image to base64 failed: ${url}`);
+    console.log(error);
+    return Promise.reject(error);
+  }
+};