Question

我正在尝试将Web上的JSON数据发送到Flask服务器以插入到MongoDB中。当我尝试在JavaScript代码中发出POST请求时，XMLHttpRequest总是返回satus 0，不知道为什么。我尝试了几种方法来执行POST请求并始终获得状态0。我不知道问题是由服务器还是由我的JavaScript代码引起的。

我发出请求的JavaScript函数如下：

var obj = JSON.stringify({name: rname, description: rdescription, image:strimage, exercises:aux});

    var xhr = new XMLHttpRequest();
    var url = "http://127.0.0.1:5000/addroutine"
    xhr.open('POST', url);
    xhr.setRequestHeader("Content-type","application/json");
    xhr.onreadystatechange = function(){
        if(xhr.readyState==4 && xhr.status == 200){
            var json = JSON.parse(xhr.responseText);
            console.log(json.name + ", " + json.description + ", " + json.image + ", " + json.exercises)
        }
        else{
            console.log(xhr.status);
        }
    }
    xhr.send(obj)

我已使用以下代码在Python中完成了Flask Server：

from flask import Flask
from flask import request
from pymongo import MongoClient
from bson.json_util import dumps
import json

client = MongoClient('localhost:27017')
db = client['workouts']
collection = db['workouts']

app = Flask(__name__)

@app.route("/addroutine", methods = ['POST'])
def add_routine():
    try:
        data = json.loads(request.data)
        idrutina = data['id']
        name = data['name']
        description = data['description']
        image = data['image']
        exercises = data['exercises']
        if idrutina and name and description and image and exercises:
            collection.insert_one({
                "_id" : idrutina,
                "description" : description,
                "image" : image,
                "exercises" : exercises
            })
        return dumps({'message' : 'SUCCESS'})
    except Exception as e:
        return dumps({'error' : str(e)})

XMLHttpRequest状态始终返回0

0 个答案: