在 Axios 中GET请求，你必须确保responseType参数设置为blob。一旦你得到response从 API 中，您需要传递Blob https://developer.mozilla.org/en-US/docs/Web/API/Blob对象（即response.data）到URL.createObjectURL() https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL功能。下面是一个关于如何创建和下载文件的完整示例（Document），在前端使用 Axios 或 Fetch API。这个答案使用了方法和代码摘录this https://stackoverflow.com/a/71324775/17865804 and this https://stackoverflow.com/a/73240097/17865804答案以及答案here https://stackoverflow.com/a/71195901/17865804 and here https://stackoverflow.com/a/71193588/17865804。有关以下方法的更多详细信息，请参阅上面的答案。出于演示目的，以下示例使用Jinja2Templates，但是，以类似的方式，您可以在 ReactJS 应用程序中使用以下脚本。
app.py
from fastapi import FastAPI, Request
from fastapi.templating import Jinja2Templates
from fastapi.responses import FileResponse
from docx import Document
app = FastAPI()
templates = Jinja2Templates(directory="templates")
@app.get('/')
def main(request: Request):
return templates.TemplateResponse("index.html", {"request": request})
@app.post("/create")
def create_file():
document = Document()
document.add_heading("file generated", level=1)
document.add_paragraph("test")
document.save('generated_file.docx')
return {"status":"Done!"}
@app.get("/download")
def download_generated_file():
file_path = "generated_file.docx"
return FileResponse(file_path, media_type='application/vnd.openxmlformats-officedocument.wordprocessingml.document', filename=file_path)
使用 Axios
模板/索引.html
<!DOCTYPE html>
<html>
<head>
<title>Create and Download a Document</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/axios/0.27.2/axios.min.js"></script>
</head>
<body>
<input type="button" value="Create Document" onclick="createFile()">
<div id="response"></div><br>
<input type="button" value="Download Document " onclick="downloadFile()">
<script>
function createFile() {
axios.post('/create', {
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
}
})
.then(response => {
document.getElementById("response").innerHTML = JSON.stringify(response.data);
})
.catch(error => {
console.error(error);
});
}
function downloadFile() {
axios.get('/download', {
responseType: 'blob'
})
.then(response => {
const disposition = response.headers['content-disposition'];
filename = disposition.split(/;(.+)/)[1].split(/=(.+)/)[1];
if (filename.toLowerCase().startsWith("utf-8''"))
filename = decodeURIComponent(filename.replace("utf-8''", ''));
else
filename = filename.replace(/['"]/g, '');
return response.data;
})
.then(blob => {
var url = window.URL.createObjectURL(blob);
var a = document.createElement('a');
a.href = url;
a.download = filename;
document.body.appendChild(a); // append the element to the dom
a.click();
a.remove(); // afterwards, remove the element
})
.catch(error => {
console.error(error);
});
}
</script>
</body>
</html>
使用获取 API
模板/索引.html
<!DOCTYPE html>
<html>
<head>
<title>Create and Download a Document</title>
</head>
<body>
<input type="button" value="Create Document" onclick="createFile()">
<div id="response"></div><br>
<input type="button" value="Download Document" onclick="downloadFile()">
<script>
function createFile() {
fetch('/create', {
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
}
})
.then(response => response.text())
.then(data => {
document.getElementById("response").innerHTML = data;
})
.catch(error => {
console.error(error);
});
}
function downloadFile() {
fetch('/download')
.then(response => {
const disposition = response.headers.get('Content-Disposition');
filename = disposition.split(/;(.+)/)[1].split(/=(.+)/)[1];
if (filename.toLowerCase().startsWith("utf-8''"))
filename = decodeURIComponent(filename.replace("utf-8''", ''));
else
filename = filename.replace(/['"]/g, '');
return response.blob();
})
.then(blob => {
var url = window.URL.createObjectURL(blob);
var a = document.createElement('a');
a.href = url;
a.download = filename;
document.body.appendChild(a); // append the element to the dom
a.click();
a.remove(); // afterwards, remove the element
})
.catch(error => {
console.error(error);
});
}
</script>
</body>
</html>
