Python Flask request.args 与 request.form
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Flask request.args vs request.form
提问by apardes
My understanding is that request.argsin Flask contains the URL encoded parameters from a GETrequest while request.formcontains POSTdata. What I'm having a hard time grasping is why when sending a POSTrequest, trying to access the data with request.formreturns a 400error but when I try to access it with request.argsit seems to work fine.
我的理解是request.args在 Flask 中包含来自GET请求的 URL 编码参数，而request.form包含POST数据。我很难理解为什么在发送POST请求时，尝试访问数据并request.form返回400错误，但是当我尝试访问它时，request.args它似乎工作正常。
I have tried sending the request with both Postmanand curland the results are identical.
我试过用Postman和发送请求，curl结果是一样的。
curl -X POST -d {"name":"Joe"} http://127.0.0.1:8080/testpoint --header "Content-Type:application/json"
Code:
代码：
@app.route('/testpoint', methods = ['POST'])
def testpoint():
name = request.args.get('name', '')
return jsonify(name = name)
回答by iurisilvio
Your json data in curl is wrong, so Flask does not parse data to form.
你在 curl 中的 json 数据是错误的，所以 Flask 没有解析数据形成。
Send data like this: '{"name":"Joe"}'
像这样发送数据： '{"name":"Joe"}'
curl -X POST -d '{"name":"Joe"}' http://example.com:8080/testpoint --header "Content-Type:application/json"
回答by Martijn Pieters
You are POST-ing JSON, neither request.argsnor request.formwill work.
您正在发布 JSON，既request.args不会也request.form不会工作。
request.formworks only if you POST data with the right content types; form datais either POSTed with the application/x-www-form-urlencodedor multipart/form-dataencodings.
request.form仅当您使用正确的内容类型POST 数据时才有效；表单数据使用application/x-www-form-urlencoded或multipart/form-data编码发布。
When you use application/json, you are no longer POSTing form data. Use request.get_json()to access JSON POST data instead:
当您使用 时application/json，您不再发布表单数据。使用request.get_json()访问JSON POST数据，而不是：
@app.route('/testpoint', methods = ['POST'])
def testpoint():
name = request.get_json().get('name', '')
return jsonify(name = name)
As you state, request.argsonly ever contains values included in the request query string, the optional part of a URL after the ?question mark. Since it's part of the URL, it is independent from the POST request body.
正如您所说，request.args只包含请求查询字符串中包含的值，即?问号后 URL 的可选部分。由于它是 URL 的一部分，因此它独立于 POST 请求正文。
