如何创建一个swagger:生成二进制应用程序/pdf文件的响应



我无法在swagger、connexion、openapi3中下载文件。在openapi规范中,我定义了以下路径:

/lab/samples/list/pdf:
get: 
summary: download pdf file
operationId: get_sample_pdf
responses:
"200":
application/pdf:
schema:
type: string
format: binary  
security:
- labuserAuth: []
x-openapi-router-controller: swagger_server.controllers.lab_controller#

调用被转发到我的lab_controler.py,它简单地返回二进制pdf

def list_sample_pdf():
f_pdf = "list_samples.pdf"
with open(f_pdf, "rb") as f:
return f.read()

当调用端点时,我收到

UnicodeDecodeError: 'utf-8' codec can't decode byte 0xdf in position 10: invalid continuation byte

当我在寻找答案时,我偶然发现了一堆不同的线索,但没有一个能真正告诉我做错了什么

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  • 如何定义swagger:生成二进制文件、应用程序/八位字节流的响应

openapi端需要什么配置?我的控制器实现应该重新转换什么,以便连接能够正确处理pdf?

这就是我运行应用程序的方式

app = connexion.App(__name__, specification_dir='./swagger/')
app.json_encoder = encoder.JSONEncoder
app.add_api('swagger.yaml', arguments={'title': 'sample-submission and notification service'}, pythonic_params=True)
#add CORS support to send Access-Control-Allow-Origin header
CORS(app.app,expose_headers=["Content-Disposition: "])
app.run(host="127.0.0.1", port=8083)

我还尝试添加一个应用程序/八位字节流响应

application/octet-stream:
encoding:
file:
headers:
Content-Disposition:
schema:
type: string
format: binary
example: attachment; filename="name.pdf"

with open(f_csv, "rb") as f: return f.read()不是返回pdf文件,而是作为这个简单的csv文件返回UTF-8可读文件时,非二进制文件的内容由connexion作为application/json响应返回

您是否尝试添加标头定义?

paths:          
/examples:
get:
responses:
'200':
description: ok
content:
application/pdf:
schema:
type: string
format: binary
headers:
Content-Disposition:
schema:
type: string
description: Used only with `application/pdf` responses
example: attachment; filename="name.pdf"

来源https://swagger.io/docs/specification/describing-responses/

paths:
get:
summary: Returns the report in the PDF format
responses:
'200':
description: A PDF file
content:
application/pdf:
schema:
type: string
format: binary

作为一种非常不优雅的解决方法,您可以执行以下操作返回:

import flask, os

resp = flask.send_from_directory(os.path.abspath(os.getcwd()), 'file_to_send.pdf',
as_attachment=True, 
mimetype='application/pdf',
attachment_filename='your_pdf_name.pdf'
)
return flask.Response(
response = resp.response,
status=200,
content_type='application/pdf',
headers=resp.headers,
mimetype=resp.mimetype
)

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