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

import axios from 'axios';
import { addLog } from '../../system/log';
import { serverRequestBaseUrl } from '../../api/serverRequest';
import { getFileContentTypeFromHeader, guessBase64ImageType } from '../utils';
import { retryFn } from '@fastgpt/global/common/system/utils';

export const getImageBase64 = async (url: string) => {
  addLog.debug(`Load image to base64: ${url}`);

  try {
    const response = await retryFn(() =>
      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 {
      completeBase64: `data:${imageType};base64,${base64}`,
      base64,
      mime: imageType
    };
  } catch (error) {
    addLog.debug(`Load image to base64 failed: ${url}`);
    console.log(error);
    return Promise.reject(error);
  }
};

export const addEndpointToImageUrl = (text: string) => {
  const baseURL = process.env.FE_DOMAIN;
  if (!baseURL) return text;
  // 匹配 /api/system/img/xxx.xx 的图片链接，并追加 baseURL
  return text.replace(
    /(?<!https?:\/\/[^\s]*)(?:\/api\/system\/img\/[^\s.]*\.[^\s]*)/g,
    (match) => `${baseURL}${match}`
  );
};