从请求响应创建 PDF 不适用于 axios，但适用于本机 xhr [英] Creating PDF from request response doesn't work with axios but works in native xhr

问题描述

为了强制从服务器下载 PDF，我尝试使用 axios 和本机 xhr 对象.原因是我必须发送 post 请求，因为我向服务器传递了太多数据，所以带有简单链接的选项(如 site.ru/download-pdf 对我不起作用).

In order to force download PDF from server I tried to use axios and native xhr object. The reason is that I have to send post request, because I pass too much data to server, so the option with simple link (like site.ru/download-pdf won't work for me).

即使我最终设法用 Xhr 做到了这一点，我仍然不知道为什么 axios 方式不起作用.

Even though I finally managed to do this with Xhr, I still don't have a clue why axios way doesn't work.

这是我使用 xhr 执行此操作的方法，它对我有用:

Here is how I do this with xhr and it works for me:

    let xhr = new XMLHttpRequest()
    xhr.open('POST', Vue.config.baseUrl + `order-results/${id}/export-pdf`, true)
    xhr.setRequestHeader("Authorization", 'Bearer ' + this.token())
    xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded")
    xhr.responseType = 'arraybuffer'

    xhr.onload = function(e) {
      if (this.status === 200) {
        let blob = new Blob([this.response], { type:"application/pdf" })
        let link = document.createElement('a')
        link.href = window.URL.createObjectURL(blob)
        link.download = 'Results.pdf'
        link.click()
      }
    };

    xhr.send("data=" + data);

这是axios-way"，我实际上得到了页数正确的 PDF，但它们都是空的:

Here is "axios-way" and I actually get PDF with correct number of pages, but they are all empty:

    axios.post(`order-results/${id}/export-pdf`, {
      data,
      responseType: 'arraybuffer'
    }).then((response) => {
      let blob = new Blob([response.data], { type:"application/pdf" })
      let link = document.createElement('a')
      link.href = window.URL.createObjectURL(blob)
      link.download = 'Results.pdf'
      link.click()
    })

Axios 已配置为发送授权令牌.我将 Application/x-www-form-urlencoded 放在 xhr 中，否则我无法在服务器端获取数据.

Axios is already configured to send Authorization token. I put Application/x-www-form-urlencoded in xhr because otherwise I couldn't get data in server side.

即使 xhr 有效，我还是更喜欢使用 axios，因为我在任何地方都使用它，而且我只是好奇我做错了什么.我尝试了不同的解决方案，但只有原生 xhr 可以完成这项工作.

Even though xhr works, I'd prefer to use axios since I use it everywhere and I'm just curios what I'm doing wrong. I tried different solutions, and only native xhr did the job.

推荐答案

以下对我有用:

axios.post("http://localhost:8080/reports/my-report/",
        data,
        {
            responseType: 'arraybuffer',
            headers: {
                'Content-Type': 'application/json',
                'Accept': 'application/pdf'
            }
        })
        .then((response) => {
            const url = window.URL.createObjectURL(new Blob([response.data]));
            const link = document.createElement('a');
            link.href = url;
            link.setAttribute('download', 'file.pdf'); //or any other extension
            document.body.appendChild(link);
            link.click();
        })
        .catch((error) => console.log(error));

如果这有帮助，请告诉我.

Let me know if this helps.

干杯！

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