translate file

index.js

const arguments = process.argv.slice(2);
const [filePath] = arguments;

main(filePath);

function main(filePath) {

  const path = require('path');
  const { root, dir, name, ext } = path.parse(filePath);

  const fs = require('fs');
  const fetch = require('node-fetch');

  let oldFileName = `${dir}/${name}${ext}`;
  let tempFileName = `${dir}${name}-temp${ext}`

  if (root === "" && (dir === "" || dir === ".")) {
    oldFileName = `./${name}${ext}`;
    tempFileName = `./${name}-temp${ext}`
  }

  const readerStream = fs.createReadStream(oldFileName);
  readerStream.setEncoding('UTF8');

  const writerStream = fs.createWriteStream(tempFileName);

  let data = '';

  // 处理流
  readerStream.on('data', async (chunk) => {
    var reg = /[\u4e00-\u9fa5]/g;
    let index = 0;
    let termList = [];
    let term = '';
    data = chunk;

    while (list = reg.exec(chunk)) {
      if ((list.index !== index + 1) && term) {
        termList.push(term);
        term = '';
      }
      term += list[0];
      index = list.index;
    }

    termList.push(term);

    const result = await translateData(termList, data);
    writerStream.write(result, 'UTF8');
    writerStream.end()

    fs.unlink(oldFileName, (error) => {
      if (error) {
        console.log("delete fille error: ", error);
        return;
      }

      fs.rename(tempFileName, oldFileName, (error) => {
        if (error) {
          console.log("rename fille error: ", error);
          return;
        };
        console.log(`${oldFileName} translate finish`);
      });
    })
  });

  readerStream.on('end', () => {
  });

  readerStream.on('error', (err) => {
    console.log("readerStream: ", err.stack);
  });


  const translateData = (termList, data) => {
    return new Promise(async (resolve, _) => {
      const dict = {}
      if (termList && termList.length) {

        for (const item of termList) {
          const [{ translation }] = await translateText(item);
          dict[item] = translation;
          data = data.replace(item, translation)
        }
        resolve(data);
      }
    });
  }

  const translateText = (
    content,
    language = "en"
  ) => {

    const config = {
      text: content,
      source_language: "detect",
      target_language: language,
    };

    return new Promise((resolve, _) => {
      fetch("https://translate.volcengine.com/crx/translate/v1/", {
        headers: {
          accept: "application/json, text/plain, */*",
          "content-type": "application/json",
        },
        body: JSON.stringify(config),
        method: "POST",
        mode: "cors",
        credentials: "include",
      })
        .then((data) => data.json())
        .then((data) => resolve([data, null]))
        .catch(() => {
          resolve([null, error_text]);
        });
    });
  };
}

package.json

{
  "name": "translate-file",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "node-fetch": "1.7.3"
  }
}

translate file.md

# node index.js your project path/your project file
node index.js /Users/Mike/Desktop/TestProject/js/background.js