Flask中向前端传递或者接收Json文件的方法

segmentfault.com/a/119000000…
最近在学习Python的flask微框架，用到最多的就是和前端针对REST API进行交互，那么自然而然传递Json就成为了家常便饭，特意总结了一下和前端交互几种方法。

1. 利用flask的**request.form.get()**方法

这一中方法主要利用flask的request.form.get方法，获得前端发送给后台的json文件

Python 端代码：

@app.route('/sendjson', methods=['POST'])
def sendjson():

# 接受前端发来的数据
data = json.loads(request.form.get('data'))

# lesson: "Operation System"
# score: 100
lesson = data["lesson"]
score = data["score"]

# 自己在本地组装成Json格式,用到了flask的jsonify方法
info = dict()
info['name'] = "pengshuang"
info['lesson'] = lesson
info['score'] = score
return jsonify(info)

JS代码：

<script>
    $(document).ready(function () {
    var data = {
         data: JSON.stringify({"lesson": "Operation System", "score": 100})
   }
      $.ajax({
        url:"/sendjson",
        type: 'POST',
        data: data,
        success: function (msg) {
            alert(msg.name)
        }
    })
  });
</script>

2. 利用flask的**request.get_data()**方法

Python端代码：

@app.route('/sendjson2',methods=['POST'])
def sendjson2():

# 接收前端发来的数据,转化为Json格式,我个人理解就是Python里面的字典格式
data = json.loads(request.get_data())

# 然后在本地对数据进行处理,再返回给前端
name = data["name"]
age = data["age"]
location = data["location"]
data["time"] = "2016"

# Output: {u'age': 23, u'name': u'Peng Shuang', u'location': u'China'}
# print data
return jsonify(data)

相比第一种方法JS的代码，这一种更常见也更容易理解一些，在前端组织好Json，再传递给后台

JS代码：

$(document).ready(function () {
    var student = new Object();
    student.name = "Peng Shuang";
    student.age = 23;
    student.location = "China";
    var data = JSON.stringify(student)

$.ajax({
    url: "/sendjson2",
    type: "POST",
    data: data,
    success: function (msg) {
        alert(msg.time)
    }
})
})

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 <script>
    $(document).ready(function () {
        var student = new Object();
        student.name = "Peng Shuang";
        student.age = 23;
        student.location = "China";
        var data = JSON.stringify(student)

    $.ajax({
        url: "/sendjson2",
        type: "POST",
        data: data,
        success: function (msg) {
            alert(msg.time)
        }
    })
    })
</script>