CORS的问题.烧瓶<->AngularJS

使用angularjs客户端应用程序和提供api的flask应用程序启动一个新项目。我使用mongodb作为数据库。我必须立即排除jsonp，因为我需要跨不同端口POST的能力。因此，angular应用程序使用localhost:9000，flask应用程序使用本地主机:9001。

我在API和我的角度文件中进行了CORS所需的更改。请参阅下面的来源。我遇到的第一个问题是，在Chrome中存在一个错误，即CORS允许标头无法识别localhost。我更新了我的主机文件，这样我就可以使用moneybooks.dev，这在不使用JSONP的情况下适用于我的GET请求。

现在，谈谈我面临的问题。当提交POST请求时，它说明Origin http://moneybooks.dev:9000 is not allowed by Access-Control-Allow-Origin什么？GET可以通过，但POST被拒绝。我看到请求通过烧瓶，但它返回HTTP400。我需要帮助使POST请求工作。

另一个可能相关的问题是，在我的GET请求中，有时GET请求根本不会触发。与BudgetCtrl中的loadBudget函数类似。在#/budgets/budgetID上，预算的名称有时根本不会加载。我查看了烧瓶日志，没有收到任何请求。然后我点击刷新，我看到了请求，预算名称出现在页面上，但在烧瓶日志中我看到了一个错误。[Errno 10053] An established connection was aborted by the software in your host machine.是一个连接错误，只有在GET请求成功时才会出现在烧瓶日志中。

这些问题有关联吗？有人看到我做错了什么吗？

app.js

'use strict';
angular.module('MoneybooksApp', ['ui.bootstrap', 'ngResource'])
  .config(['$routeProvider', '$httpProvider', function ($routeProvider, $httpProvider) {
    $httpProvider.defaults.useXDomain = true;
    delete $httpProvider.defaults.headers.common['X-Requested-With'];
    $routeProvider
      .when('/', {
        templateUrl: 'views/main.html',
        controller: 'MainCtrl'
      })
      .otherwise({
        redirectTo: '/'
      });
  }]);

预算.js

'use strict';
angular.module('MoneybooksApp')
  .config(['$routeProvider', function ($routeProvider) {
    $routeProvider
      .when('/budgets', {
        templateUrl: 'views/budgets-list.html',
        controller: 'BudgetListCtrl'
      })
      .when('/budgets/:budgetID', {
        templateUrl: 'views/budget.html',
        controller: 'BudgetCtrl'
      });
  }])
  .controller('BudgetListCtrl', function ($scope, $http, $resource) {
    $scope.budgets = [];
    var init = function () {
      $scope.loadBudgets();
    }
    $scope.loadBudgets = function() {
      $http.get('http://moneybooks.dev:9001/api/budgets')
        .success(function (data) {
          $scope.budgets = data;
        })
        .error(function (data) {
          console.error(data);
        });
    };
    init();
  })
  .controller('BudgetCtrl', function ($scope, $http, $routeParams, $resource) {
    $scope.budget = {};
    var init = function () {
      $scope.loadBudget();
    };
    $scope.loadBudget = function() {
      $http.get('http://moneybooks.dev:9001/api/budgets/'+$routeParams['budgetID'])
        .success(function (data) {
          $scope.budget = data;
        })
        .error(function (data) {
          console.error(data);
        });
    };
    init();
  })
  .controller('TransactionCtrl', function ($scope, $http, $routeParams, $resource) {
    $scope.transactions = [];
    $scope.editing = false;
    $scope.editingID;
    var init = function () {};

    $scope.syncUp = function () {
      $http.post('http://moneybooks.dev:9001/api/budgets/'+$routeParams['budgetID']+'/transactions', {transactions: $scope.transactions});
    };
    $scope.syncDown = function () {
      $http.get('http://moneybooks.dev:9001/api/budgets/'+$$routeParams['budgetID']+'/transactions')
        .success(function (transactions) {
          $scope.transactions = transactions;
        });
    };
    $scope.add = function() {
      $scope.transactions.push({
        amount: $scope.amount,
        description: $scope.description,
        datetime: $scope.datetime
      });
      reset();
      $scope.defaultSort();
    };
    $scope.edit = function(index) {
      var transaction = $scope.transactions[index];
      $scope.amount = transaction.amount;
      $scope.description = transaction.description;
      $scope.datetime = transaction.datetime;
      $scope.inserting = false;
      $scope.editing = true;
      $scope.editingID = index;
    };
    $scope.save = function() {
      $scope.transactions[$scope.editingID].amount = $scope.amount;
      $scope.transactions[$scope.editingID].description = $scope.description;
      $scope.transactions[$scope.editingID].datetime = $scope.datetime;
      reset();
      $scope.defaultSort();
    };
    var reset = function() {
      $scope.editing = false;
      $scope.editingID = undefined;
      $scope.amount = '';
      $scope.description = '';
      $scope.datetime = '';
    };
    $scope.cancel = function() {
      reset();
    };

    $scope.remove = function(index) {
      $scope.transactions.splice(index, 1);
      if ($scope.editing) {
        reset();
      }
    };
    $scope.defaultSort = function() {
      var sortFunction = function(a, b) {
        var a_date = new Date(a['datetime']);
        var b_date = new Date(b['datetime']);
        if (a['datetime'] === b['datetime']) {
          var x = a['amount'], y = b['amount'];
          return x > y ? -1 : x < y ? 1 : 0;
        } else {
          return a_date - b_date
        }
      };
      $scope.transactions.sort(sortFunction);
    };
    $scope.descriptionSuggestions = function() {
      var suggestions = [];
      return $.map($scope.transactions, function(transaction) {
        if ($.inArray(transaction.description, suggestions) === -1){
          suggestions.push(transaction.description);
          return transaction.description;
        }
      });
    };
    $scope.dateSuggestions = function () {
      var suggestions = [];
      return $.map($scope.transactions, function(transaction) {
        if ($.inArray(transaction.datetime, suggestions) === -1){
          suggestions.push(transaction.datetime);
          return transaction.datetime;
        }
      });
    }
    $scope.getRunningTotal = function(index) {
      var runningTotal = 0;
      var selectedTransactions = $scope.transactions.slice(0, index+1);
      angular.forEach(selectedTransactions, function(transaction, index){
        runningTotal += transaction.amount;
      });
      return runningTotal;
    };
    init();
    $(function(){
      (function($){
        var header = $('#budget-header');
        var budget = $('#budget');
        var pos = header.offset();
        $(window).scroll(function(){
          if ($(this).scrollTop() > pos.top && header.css('position') == 'static') {
            header.css({
              position: 'fixed',
              width: header.width(),
              top: 0
            }).addClass('pinned');
            budget.css({
              'margin-top': '+='+header.height()
            });
          } else if ($(this).scrollTop() < pos.top && header.css('position') == 'fixed') {
            header.css({
              position: 'static'
            }).removeClass('pinned');
            budget.css({
              'margin-top': '-='+header.height()
            });
          }
        });
      })(jQuery);
    });
  });

API.py

from flask import Flask, Response, Blueprint, request
from pymongo import MongoClient
from bson.json_util import dumps
from decorators import crossdomain
from bson.objectid import ObjectId
try:
    import json
except ImportError:
    import simplejson as json
class APIEncoder(json.JSONEncoder):
    def default(self, obj):
        if isinstance(obj, objectid.ObjectID):
            return str(obj)
app = Flask(__name__)
client = MongoClient()
db = client['moneybooks']
api = Blueprint('api', __name__, url_prefix="/api")
@api.route('/budgets', methods=['GET', 'POST', 'OPTIONS'])
@crossdomain(origin='*', methods=['GET', 'POST', 'OPTIONS'], headers=['X-Requested-With', 'Content-Type', 'Origin'])
def budgets():
    if request.method == "POST":
        budget_id = db.budgets.insert({
            'name': request.form['name']
        })
        budget_json = dumps(db.budgets.find_one({'_id': budget_id}), cls=APIEncoder)
    if request.method == "GET":
        budget_json = dumps(db.budgets.find(), cls=APIEncoder)
    return Response(budget_json, mimetype='application/json')
@api.route('/budgets/<budget_id>', methods=['GET', 'OPTIONS'])
@crossdomain(origin='*', methods=['GET', 'OPTIONS'], headers=['X-Requested-With', 'Content-Type', 'Origin'])
def budget(budget_id):
  budget_json = dumps(db.budgets.find_one({'_id': ObjectId(budget_id)}), cls=APIEncoder)
  return Response(budget_json, mimetype='application/json')
@api.route('/budgets/<budget_id>/transactions', methods=['GET', 'POST', 'OPTIONS'])
@crossdomain(origin='*', methods=['GET', 'POST', 'OPTIONS'], headers=['X-Requested-With', 'Content-Type', 'Origin'])
def transactions(budget_id):
    if request.method == "POST":
        db.budgets.update({
            '_id': ObjectId(budget_id)
        }, {
            '$set': {
                'transactions': request.form['transactions']
            }
        });
        budget_json = dumps(db.budgets.find_one({'_id': ObjectId(budget_id)}), cls=APIEncoder)
    if request.method == "GET":
        budget_json = dumps(db.budgets.find_one({'_id': ObjectId(budget_id)}).transactions, cls=APIEncoder)
    return Response(budget_json, mimetype='application/json')
app.register_blueprint(api)
if __name__ == '__main__':
    app.config['debug'] = True
    app.config['PROPAGATE_EXCEPTIONS'] = True
    app.run()

装饰器.py

from datetime import timedelta
from flask import make_response, request, current_app
from functools import update_wrapper
def crossdomain(origin=None, methods=None, headers=None, max_age=21600, attach_to_all=True, automatic_options=True):
    if methods is not None:
        methods = ', '.join(sorted(x.upper() for x in methods))
    if headers is not None and not isinstance(headers, basestring):
        headers = ', '.join(x.upper() for x in headers)
    if isinstance(max_age, timedelta):
        max_age = max_age.total_seconds()
    def get_methods():
        if methods is not None:
            return methods
        options_resp = current_app.make_default_options_response()
        return options_resp.headers['allow']
    def decorator(f):
        def wrapped_function(*args, **kwargs):
            if automatic_options and request.method == 'OPTIONS':
                resp = current_app.make_default_options_response()
            else:
                resp = make_response(f(*args, **kwargs))
            if not attach_to_all and request.method != 'OPTIONS':
                return resp
            h = resp.headers
            h['Access-Control-Allow-Origin'] = origin
            h['Access-Control-Allow-Methods'] = get_methods()
            h['Access-Control-Max-Age'] = str(max_age)
            if headers is not None:
                h['Access-Control-Allow-Headers'] = headers
            return resp
        f.provide_automatic_options = False
        f.required_methods = ['OPTIONS']
        return update_wrapper(wrapped_function, f)
    return decorator

编辑

chrome dev控制台的输出。

控制台：

XMLHttpRequest cannot load http://moneybooks.dev:9001/api/budgets/5223e780f58e4d20509b4b8b/transactions. Origin http://moneybooks.dev:9000 is not allowed by Access-Control-Allow-Origin.

网络

Name: transactions /api/budgets/5223e780f58e4d20509b4b8b
Method: POST
Status: (canceled)
Type: Pending
Initiator: angular.js:9499
Size: 13 B / 0 B
Latency: 21 ms