Question

我可以用Postman罚款提取填充的pdf，但是我的代码仅显示空白的pdf：

async function getWeeklyReport(queryString) {
  return new Promise((resolve, reject) => {
    request({
      url: 'https://reports.myApi.com/ReportCenter/Bookings',
      qs: queryString,
      headers: {
        'Content-Type': 'application/pdf',
        'Accept': 'application/pdf',
        'Authorization': 'Basic ' + new Buffer(process.env.apiEmail + ':' + process.env.apiPassword, 'utf8').toString('base64')
      }
    }, (error, response, body) => {
      if (error) {
        reject(error);
      } else {
        if (response.statusCode === 200) {
          resolve(body);
        } else if (response.statusCode === 409) {
          setTimeout(() => {
            resolve(getWeeklyReport(queryString));
          }, response.headers['Retry-After'] * 1000);
        } else {
          reject(response);
        }
      }
    });
  });
}

这是我写的地方：

async function saveCSVLocally(path, obj) {
  return new Promise((resolve, reject) => {
    fs.writeFile(path, obj, 'utf8', function (err) {
      if (err) {
        console.log('Some error occured - file either not saved or corrupted file saved.');
        console.log(err);
      } else{
        console.log('File saved locally');
      }
    });
  })
}

我尝试了几种调用方式，但均无效：

const report = await getWeeklyReport(queryString);
//saveFileLocally(localPath, report);//.then(emailSender.sendNewEmail());
//fs.writeFileSync("test.pdf", report,'binary');

那么我如何正确提取此pdf？谢谢！

Answer 1

确保您正在调用诺言的resolve()和reject()函数以完成诺言：

function saveCSVLocally(path, data) {
  return new Promise((resolve, reject) => {
    fs.writeFile(path, data, 'utf8', function (err) {
      if (err) {
        console.log('Some error occured - file either not saved or corrupted file saved.');
        reject(err);
     } else {
        console.log('File saved locally');
        resolve();
      }
    });
  })
}

还：请记住，fs.writeFile()的第二个参数是一个字符串（不是对象），尽管从技术上讲它可以使用一个碰巧是一个缓冲区。我个人会使用变量data以避免混淆。

异步API调用以获取PDF返回空白PDF

1 个答案: