Flask:单击按钮下载 csv 文件 [英] Flask: Download a csv file on clicking a button
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问题描述
我刚开始使用 Flask/Python.我想要实现的是我的 HTML 中有一个下载按钮，它调用以下函数:
I just got started with Flask/Python. What I want to achieve is that I have a download button in my HTML and it calls the following function:
function downloadPlotCSV() {
$.ajax({
url: "/getPlotCSV",
type: "post",
success: function(data) {
dataPlot = JSON.parse(data);
console.log(dataPlot);
}
});
}
不完整的flask代码是:
The incomplete flask code is:
@app.route('/getPlotCSV', methods = ['POST'])
def plotCSV():
data = open("outputs/Adjacency.csv")
我面临的问题是我找不到下载此 csv 文件或将其作为 JSON 字符串返回的方法，因此我可以使用 Javascript 下载它.知道如何将其作为 JSON 发送或通过 Flask 本身下载吗?最好的方法是什么?
The problem I am facing is that I cannot find a way to download this csv file or return it as a JSON string so I can download it using Javascript. Any idea how I can send it as JSON or maybe download it via Flask itself? What's the best way?
推荐答案
这是一种无需 Javascript 即可下载 CSV 文件的方法:
Here is one way to download a CSV file with no Javascript:
#!/usr/bin/python
from flask import Flask, Response
app = Flask(__name__)
@app.route("/")
def hello():
return '''
<html><body>
Hello. <a href="/getPlotCSV">Click me.</a>
</body></html>
'''
@app.route("/getPlotCSV")
def getPlotCSV():
# with open("outputs/Adjacency.csv") as fp:
# csv = fp.read()
csv = '1,2,3
4,5,6
'
return Response(
csv,
mimetype="text/csv",
headers={"Content-disposition":
"attachment; filename=myplot.csv"})
app.run(debug=True)
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