Javascript POST 请求 Flask 返回空字典

Question

在我的代码中，我一直从我的 javascript XML HTTP Post 请求中获取一个空的不可变字典。这是发送请求的 javascript (javascript)：

xhr = new XMLHttpRequest();

xhr.open("POST", "https://webpage-hoster--lovethebears1o1.repl.co/save", true)

xhr.setRequestHeader('Content-Type', 'application/json');

xhr.send(JSON.stringify({

    username: infotxt[0],

    password: infotxt[1],

    number: infotxt[2],

    code: input.value,

    name: titleBox.value

}));

蟒蛇：

@app.route("/save", methods=["POST"])

def save():

  try:

    print(str(request.form))

    username = str(request.form["username"])

    pword = str(request.form["password"])

    number = int(request.form["number"])

    code = str(request.form["code"])

    name = str(request.form["name"])

  except Exception as e:

    print("error-1-" + str(e))

    return "error"

return "success"

当我运行它时，我在输出中得到了这个：

ImmutableMultiDict([])

error-1-400 Bad Request: The browser (or proxy) sent a request that this server could not understand.

服务器将其视为空字典，即使发送时其中包含值。

Answer 1

当您将帖子作为 JSON 发送时，它不在request.form. 尝试：from flask import jsonify, requestJSON_received = request.get_json()print(JSON_received)print(jsonify(JSON_received)) # note the differenceusername = JSON_received["username"]etc...