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from sqlalchemy import desc
from datamodels.relational_tables import initialize_datamodels
from dataaccess.postgresql.database import (session_scope)
import datamodels.relational_tables
from flask.ext.admin import Admin, BaseView, expose
from akamai_env import get_akamai_config
from flask import request
import json
from sqlalchemy.sql.functions import now
from flask import Flask, redirect, url_for
import logging
_log = logging.getLogger(__name__)
akamai_config = get_akamai_config()
base_url = akamai_config['webserver']['base_url']
class RollBack(BaseView):
@expose('/')
def fetch_healthy_dataset_from_db(self):
initialize_datamodels()
with session_scope() as session:
epd_ip_dataset = datamodels.relational_tables.EpdIpDataset
qry = session.query(epd_ip_dataset).filter_by(dataset_state='healthy').order_by(
desc(epd_ip_dataset.dataset_id)).all()
qry_last = session.query(epd_ip_dataset).filter_by(dataset_state='healthy').order_by(
desc(epd_ip_dataset.dataset_id)).first()
url = url_for('.return_rollback_ui')
url_for('rollback.return_rollback_ui')
return self.render('airflow/base.html',
qry=qry,
dataset_id=qry_last.dataset_id,
base_url=base_url,
url=url)
@expose('/roll', methods=['POST'])
def return_rollback_ui(self):
if request.method == 'POST':
#body_req = request.json
body_req = request.get_data()
_log.error("Body of the request is ", body_req)
#data = json.dumps(body_req)
#self.initalize_db(body_req)
return '<html> <h1> Hi I am sending a response</h1></html>'
def initalize_db(self, body):
dataset_id = body
epdumppushrollback = datamodels.relational_tables.EpdUmpPushRollback
with session_scope() as session:
epdumppushrollback_obj = epdumppushrollback()
epdumppushrollback_obj.dataset_id = dataset_id
epdumppushrollback_obj.record_id = ''
epdumppushrollback_obj.operator_name = ''
epdumppushrollback_obj.activation_flag = 'active'
epdumppushrollback_obj.record_creation_time = now()
epdumppushrollback_obj.start_time = now()
epdumppushrollback_obj.end_time = ''
session.add(epdumppushrollback_obj)
session.flush()
class RollBackResume(BaseView):
# @expose('/')
# def index(self):
# return self.render('airflow/dags.html')
def fetch_audited_dataset_from_db(self):
initialize_datamodels()
with session_scope() as session:
epd_ip_dataset = datamodels.relational_tables.EpdIpDataset
qry = session.query(epd_ip_dataset).filter_by(dataset_state='audited'). \
order_by(desc(epd_ip_dataset.dataset_id)).all()
return qry
@expose('/')
def return_resume_ui(self):
qry = self.fetch_audited_dataset_from_db()
return self.render('airflow/rollback_resume.html',
qry=qry,
base_url=base_url)
@expose('/rollbackresume', methods=['POST'])
def return_rollback_ui(self):
if request.method == 'POST':
body_req = request.json
data = json.dumps(body_req)
def fetch_from_db(self):
dataset_id = None
initialize_datamodels()
with session_scope() as session:
epd_ump_push_rollback = datamodels.relational_tables.EpdUmpPushRollback
qry = session.query(epd_ump_push_rollback).filter_by(activation_flag='active'). \
order_by(desc(epd_ump_push_rollback.dataset_id)).first()
if qry:
dataset_id = qry.dataset_id
return dataset_id
def write_to_db(self):
dataset_id = self.fetch_from_db()
epd_ump_push_rollback = datamodels.relational_tables.EpdUmpPushRollback
with session_scope() as session:
qry = session.query(epd_ump_push_rollback)
for rows in qry:
if rows.dataset_id == dataset_id:
rows.activation_flag = 'inactive'
rows.end_time = now()
session.commit()
session.flush()
break
HTML Page :
<html>
<style>
p
{
opacity: 0;
}
</style>
<head>
<title>Roll back UI</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<nav class="navbar navbar-inverse">
<div class="container-fluid">
<div class="navbar-header">
<a class="navbar-brand" href="{{base_url}}/admin/">Airflow</a>
</div>
<ul class="nav navbar-nav">
<li class="active"><a href="{{base_url}}/admin/">DAGs</a></li>
<li class="dropdown"><a class="dropdown-toggle" data-toggle="dropdown" href="#">Data Profiling <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="{{base_url}}/admin/queryview/">Ad Hoc query</a></li>
<li><a href="{{base_url}}/admin/chart/">Charts</a></li>
<li><a href="{{base_url}}/admin/knownevent/">Known Events</a></li>
</ul>
</li>
<li class="dropdown"><a class="dropdown-toggle" data-toggle="dropdown" href="#">Browse <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="{{base_url}}/admin/slamiss/">SLA Instances</a></li>
<li><a href="{{base_url}}/admin/taskinstance/">Task Instances</a></li>
<li><a href="{{base_url}}/admin/log/">Logs</a></li>
<li><a href="{{base_url}}/admin/basejob/">Jobs</a></li>
<li><a href="{{base_url}}/admin/dagrun/">DAG Runs</a></li>
</ul>
</li>
<li class="dropdown"><a class="dropdown-toggle" data-toggle="dropdown" href="#">Admin <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="{{base_url}}/admin/pool/">Pools</a></li>
<li><a href="{{base_url}}/admin/configurationview/">Configuration</a></li>
<li><a href="{{base_url}}/admin/user/">Users</a></li>
<li><a href="{{base_url}}/admin/connection/">Connections</a></li>
<li><a href="{{base_url}}/admin/variable/">Variables</a></li>
<li><a href="{{base_url}}/admin/xcom/">XComs</a></li>
</ul>
</li>
<li class="dropdown"><a class="dropdown-toggle" data-toggle="dropdown" href="#">Rollback <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="{{base_url}}/admin/rollback/">Rollback </a></li>
<li><a href="{{base_url}}/admin/rollbackresume/">Resume</a></li>
</ul>
</li>
<li class="dropdown"><a class="dropdown-toggle" data-toggle="dropdown" href="#">Docs <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">Documentation</a></li>
<li><a href="#">Github</a></li>
</ul>
</li>
<li class="dropdown"><a class="dropdown-toggle" data-toggle="dropdown" href="#">About <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="{{base_url}}/admin/versionview/">Version</a></li>
</ul>
</li>
</ul>
</div>
</nav>
<div class="container">
<h3>RollBack UI</h3>
<table class="table table-bordered">
<thead class="thead-dark">
<tr>
<th scope="col">#</th>
<th scope="col" >Dataset Id</th>
<th scope="col">Dataset State</th>
</tr>
</thead>
<tbody>
{% for i in qry%}
<tr>
<th scope="row"> </th>
<td> {{ i.dataset_id }} </td>
<td> {{ i.dataset_state }} </td>
</tr>
{% endfor %}
</tbody>
</table>
</div>
<head>
<div class="container">
<button type="button" class="btn btn-primary" onclick="loadDoc()" id="myBtn"> Rollback to {{dataset_id}} </button>
</div>
<p id="dataset_id"> {{ dataset_id }}</p>
<script>
function loadDoc()
{
document.getElementById("myBtn").disabled = true;
var xhttp = new XMLHttpRequest();
var dataset_id = document.getElementById("dataset_id");
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
document.getElementById("demo").innerHTML = this.responseText;
}
};
xhttp.open("POST", "http://localhost:8085/admin/rollback/roll/", true);
xhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xhttp.send("foo=bar&lorem=ipsum");
}
</script>
</head>
<body>
<h2> Url of the index is {{ url }} </h2>
</body>>
</html>
代码说明：
我有一个RollBack类，它在查询数据库后返回一个表，该页面上有一个按钮；当我单击该按钮时，我想使用html页面中的XMLHttpRequest将一些数据发布到正在执行的端点。
当我单击该按钮时，发布数据将我定向到@expose('/')方法而不是@expose('/roll')，因为@expose('/')方法不支持发布方法，它将引发405错误。我希望按钮的onclick动作重定向到@expose('/roll')方法。
答案 0 :(得分：0)
您的代码抛出405的原因是因为您尚未配置暴露函数来处理POST方法。默认是仅处理GET，如docs中所述。
您的代码逻辑应类似于以下内容：
从烧瓶导入请求中
class RollBack(BaseView):
@expose('/', methods=('GET', 'POST'))
def fetch_healthy_dataset_from_db(self):
if request.method == 'POST':
# Anything within this block is processing a POST method
# make sure you eventually return a view
return "Success"
# Anything after this point is processing a GET method