关于在Flask中使用Restful

学习例子 
#!flask/bin/python
from flask import Flask, jsonify
from flask import abort
from flask import make_response
from flask import request
from flask import url_for
from flask.ext.httpauth import HTTPBasicAuth
app = Flask(__name__)

tasks = [
    {
        'id': 1,
        'title': u'Buy groceries',
        'description': u'Milk, Cheese, Pizza, Fruit, Tylenol',
        'done': False
    },
    {
        'id': 2,
        'title': u'Learn Python',
        'description': u'Need to find a good Python tutorial on the web',
        'done': False
    }
]

#show task by task id
@app.route('/todo/api/v1.0/tasks/<int:task_id>', methods=['GET'])
def get_task(task_id):
    task = filter(lambda t: t['id'] == task_id, tasks)
    if len(task) == 0:
        abort(404)
    return jsonify({'task': task[0]})
 
#add friendly  not found  json tip
@app.errorhandler(404)
def not_found(error):
    return make_response(jsonify({'error': 'Not found'}), 404)
 
@app.route('/todo/api/v1.0/tasks', methods=['GET'])
def get_tasks():
    return jsonify({'tasks': tasks})


#show task
@app.route('/todo/api/v1.0/tasks', methods=['POST'])
def create_task():
    if not request.json or not 'title' in request.json:
        abort(400)
    task = {
        'id': tasks[-1]['id'] + 1,
        'title': request.json['title'],
        'description': request.json.get('description', ""),
        'done': False
    }
    tasks.append(task)
    return  make_response(jsonify({'task': task}), 201)
 
#put a task
@app.route('/todo/api/v1.0/tasks/<int:task_id>', methods=['PUT'])
def update_task(task_id):
    task = filter(lambda t: t['id'] == task_id, tasks)
    if len(task) == 0:
        abort(404)
    if not request.json:
        abort(400)
    if 'title' in request.json and type(request.json['title']) != unicode:
        abort(400)
    if 'description' in request.json and type(request.json['description']) is not unicode:
        abort(400)
    if 'done' in request.json and type(request.json['done']) is not bool:
        abort(400)
    task[0]['title'] = request.json.get('title', task[0]['title'])
    task[0]['description'] = request.json.get('description', task[0]['description'])
    task[0]['done'] = request.json.get('done', task[0]['done'])
    return jsonify({'task': task[0]})

#delete a task
@app.route('/todo/api/v1.0/tasks/<int:task_id>', methods=['DELETE'])
def delete_task(task_id):
    task = filter(lambda t: t['id'] == task_id, tasks)
    if len(task) == 0:
        abort(404)
    tasks.remove(task[0])
    return jsonify({'result': True})

#make url
def make_public_task(task):
    new_task = {}
    for field in task:
        if field == 'id':
            new_task['uri'] = url_for('get_task', task_id=task['id'], _external=True)
        else:
            new_task[field] = task[field]
    return new_task
 
@app.route('/todo/api/v1.0/tasks_url', methods=['GET'])
def get_tasks_url():
    return jsonify({'tasks': map(make_public_task, tasks)})

 
#HTTP BASIC AUTH  access
auth = HTTPBasicAuth()

@auth.get_password
def get_password(username):
    if username == 'ok':
        return 'python'
    return None

@auth.error_handler
def unauthorized():
   return make_response(jsonify({'error': 'Unauthorized access'}), 403)
 
@app.route('/todo/api/v1.0/tasks_auth', methods=['GET'])
@auth.login_required
def get_tasks_auth():
    return jsonify({'tasks': tasks})


if __name__ == '__main__':
    app.run(debug=True)