Python生成并下载文件后端代码实例

txt文件

生成并下载txt文件:

@app.route('/download', methods=['GET'])

def download():

content = "long text"

response = make_response(content)

response.headers["Content-Disposition"] = "attachment;

filename=myfilename.txt"

return response

运行app.py后,在浏览器中输入:http://127.0.0.1:5000/download,直接下载txt文件。

excel 文件

生成并下载excel 文件:

@app.route("/export",methods = ['GET'])

def export():

out = BytesIO()

workbook = xlsxwriter.Workbook(out)

table = workbook.add_worksheet()

table.write(0, 0, "第1列")

table.write(0, 1, "第2列")

table.write(0, 2, "第3列")

table.write(0, 0, "name")

table.write(1, 1, "sex")

table.write(2, 2, "class")

workbook.close()

out.seek(0)

filename = quote("Entity类下载.xlsx")

rv = send_file(out, as_attachment=True, attachment_filename=filename)

rv.headers['Content-Disposition'] += "; filename*=utf-8''{}".format(filename)

return rv

运行app.py后,在浏览器中输入:http://127.0.0.1:5000/export,可以直接下载excel文件。

前后端分离时,接口返回时要注意headers 

def exportExcel():

workbook = xlwt.Workbook(encoding='utf-8')

wSheet = workbook.add_sheet("Plan")

titleFont = xlwt.Font()

f = BytesIO()

workbook.save(f)

f.seek(0)

filename = quote(saveFile) # 将单个字符串编码转化为 %xx%xx 的形式

rv = send_file(f, as_attachment=True, attachment_filename=filename)

rv.headers['Content-Disposition'] += "; filename*=utf-8''{}".format(filename)

rv.headers['Cache-Control'] = 'no-store' # 重点在这句!!!!!!!!!!!!!!!!!

return rv

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