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WerkZeug.py
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WerkZeug.py
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#!/user/bin/python
# -*- coding: utf-8 -*-
# Author : (DEK) Devendra Kavthekar
# load demo data
# repair invalid json files
# delete student
# never open file in each function, which will cause too many open file handlers
# viewdata,loaddemodata,insertdata
# PLEASE READ
# THE FOLLOWING REQUIRES MY CUSTOM DEBUGG CLASS TO WORK
import os
import sys
print "s"
from time import gmtime, strftime
import json
import urlparse
import inspect
from werkzeug.wrappers import Request, Response
from werkzeug.serving import run_simple
from werkzeug.routing import Map, Rule
from werkzeug.exceptions import HTTPException
from werkzeug.wsgi import SharedDataMiddleware
from jinja2 import Environment, FileSystemLoader
import jinja2
import logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)
class deprecatedd():
def __init__(self, f):
self.fun = f
print "init"
def __call__(self, *arg):
print "call"
self.fun()
class DataStore:
sid = -1
class App:
__jsonFileName = 'newdata.json'
__backupFileName = 'backupjson.json'
__datafilesPath = 'static/datafiles/'
jsonFile = __datafilesPath + __jsonFileName
backupjsonFile = __datafilesPath + __backupFileName
def __init__(self):
self.url_map = Map([
Rule('/', endpoint='index'),
Rule('/index', endpoint='index'),
Rule('/insert', endpoint='insert'),
Rule('/edit', endpoint='edit'),
Rule('/loaddemodata', endpoint='loadDemoData'),
Rule('/remove', endpoint='remove'),
Rule('/search', endpoint='search'),
])
self.templateLoader = FileSystemLoader(searchpath="templates/")
self.templateEnv = Environment(
loader=self.templateLoader,
undefined=jinja2.StrictUndefined)
self.indexTemplate = "newjinjatem.html"
self.insertTemplate = "insertTemplate.html"
self.editTemplate = "editTemplate.html"
class gateway():
def __init__(self, mimetype='text/html'):
self.mimetype = mimetype
def __call__(self, fun):
self.fun = fun
def setRes(*args):
return Response(self.fun(*args), mimetype=self.mimetype)
return setRes
# Endpoints
#*************************************************************************
# loadDemoData- to load demo data
@gateway(mimetype="text/html")
def loadDemoData(self, request, args):
backupcontent = open(App.backupjsonFile, 'r').read()
App.replaceFiledata(App.jsonFile, backupcontent)
return self.loadDefaultTemplate(request)
@gateway(mimetype='text/html')
def index(self, request, args):
return self.loadDefaultTemplate(request)
@gateway(mimetype='text/html')
def edit(self, request, args):
postDataLen = len(request.form.values())
print "postDataLen", postDataLen
if postDataLen != 0:
print "!@#$%^&*()**********"
studentdata = ''
for firstrec in request.form.iteritems():
studentdata = str(list(firstrec)[0])
self.removeIdFromFile(DataStore.sid)
self.insertRecord(App.jsonFile, studentdata)
jsondata = App.getJsonFromFile(App.jsonFile)
self.renderTemplate(self.indexTemplate, jsondata=jsondata,
loadstudentid=self.sid)
# self.deletesid = self.sid
# //we can use sessionMIddleware/hidden fields/DataStore,
# but a workaround solution
DataStore.sid = self.sid
self.template = self.templateEnv.get_template(self.editTemplate)
jsondata = App.getJsonFromFile(App.jsonFile)
return self.template.render(jsondata=jsondata[self.sid])
@gateway(mimetype='text/html')
def remove(self, request, args):
# self.removeCurIdFromFile()
self.removeIdFromFile(self.sid)
return self.loadDefaultTemplate(request)
@gateway(mimetype='text/html')
def insert(self, request, args):
postdatalen = len(request.form.values())
if postdatalen != 0:
studentdata = ''
for firstrec in request.form.iteritems():
studentdata = str(list(firstrec)[0])
App.insertRecord(App.jsonFile, studentdata)
return self.loadDefaultTemplate(request)
self.template = self.templateEnv.get_template(self.insertTemplate)
return self.template.render()
def renderTemplate(self, templateName, **dataDict):
template1 = self.templateEnv.get_template(templateName)
return template1.render(dataDict)
# pass
# @gateway(mimetype='application/json')
# def search(self, request, args):
# pass
#$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$S
@staticmethod
def insertRecord(file, record):
jsoncontent = open(App.jsonFile).read()
App.replaceFiledata(
App.jsonFile, jsoncontent[0:len(jsoncontent) - 1] +
# "," +
record + "]")
# @staticmethod
def removeIdFromFile(self, sid):
Debugg.info("Removing SID : " + str(sid))
jsondata = App.getJsonFromFile(App.jsonFile)
i = 0
try:
with open(App.jsonFile, 'w') as outfile:
outfile.write('[')
for student in jsondata: # use yield
Debugg.info("STR(I) " + str(i))
if sid != i:
json.dump(jsondata[i], outfile)
try:
if jsondata[i + 1]:
outfile.write(',')
except IndexError, ie:
Debugg.info('IndexOutOfBounds %s', str(ie))
else:
Debugg.info(type(student))
Debugg.info(student)
i += 1
outfile.write(']')
self.sid -= 1
except Exception as excep:
Debugg.info(type(excep), magic="warning")
Debugg.info(excep, magic="warning")
# version management ;)
@deprecatedd
def removeCurIdFromFile(self):
# acquire lock
# Debugg.info(jsondata)
# Debugg.info("i is %d" % i)
Debugg.info(self.sid)
jsondata = App.getJsonFromFile(App.jsonFile)
i = 0
try:
with open(App.jsonFile, 'w') as outfile:
outfile.write('[')
for student in jsondata: # use yield
if self.sid != i:
json.dump(jsondata[i], outfile)
try:
if jsondata[i + 1]:
outfile.write(',')
except IndexError, ie:
Debugg.info('IndexOutOfBounds %s', str(ie))
else:
Debugg.info(type(student))
Debugg.info(student)
i += 1
outfile.write(']')
except Exception as excep:
Debugg.info(type(excep))
Debugg.info(excep)
# release lock
def loadDefaultTemplate(self, request):
self.jsondata = App.getJsonFromFile(App.jsonFile)
Debugg.info(self.sid)
try:
Debugg.info(self.jsondata[self.sid])
except IndexError:
Debugg.info(magic="warning", msg="*" * 50 + "IndexError")
# Debugg.trace()
return self.renderTemplate(self.indexTemplate, jsondata=self.jsondata,
NosubjectRows=3,
title="StudentForm",
loadstudentid=self.sid)
@staticmethod
def repairJsonFile():
Debugg.info('inside repairJsonFile')
try:
json_data = open(App.jsonFile).read()
Debugg.info("@@@ " + "repairJsonFile")
Debugg.info(json_data)
json_data = json_data[0:json_data.rfind('}')]
json_data = json_data + '}]'
App.replaceFiledata(App.jsonFile, json_data)
Debugg.info("$$$ " + json_data)
except ValueError, v:
Debugg.info(str(v))
# App.repairJsonFile()
@staticmethod
def replaceFiledata(file, data):
with open(file, 'w') as outfile:
outfile.write(data)
@staticmethod
def getJsonFromFile(filename):
try:
json_data = open(filename)
jsondata = json.load(json_data)
json_data.close()
return jsondata
except ValueError, v:
Debugg.info("%s", str(v))
App.repairJsonFile()
# A workaround solution
json_data = open(filename)
jsondata = json.load(json_data)
json_data.close()
return jsondata
def getParamFromUrlRequest(request, filterStr):
try:
urldict = urlparse.parse_qs(request.environ['QUERY_STRING'])
Debugg.info("SID ISSSS " + urldict[filterStr][0])
# do not write here self.sid
# doing that will blow up the whole thing
sid = urldict[filterStr][0]
Debugg.info(sid)
if sid:
print "return", sid
return sid
except:
Debugg.info(
__file__ + sys._getframe().f_code.co_name)
return 0
def getCurrentSid(request):
return int(getParamFromUrlRequest(request, "sid"))
def processRequest(request):
app = App()
urls = app.url_map.bind_to_environ(request.environ)
try:
endpoint, args = urls.match()
# refactor
# common parameter SID that is assigned on each request to use later
app.sid = getCurrentSid(request)
if app.sid is None:
app.sid = 0
print inspect.currentframe().f_back.f_lineno
# Debugg.info(msg, lineno)
Debugg.info(
msg="SID is " + str(app.sid),
lineno=inspect.currentframe().f_back.f_lineno)
# Debugg.info()
return getattr(app, endpoint)(request, args)
except HTTPException, e:
print e
# Debugg.info("Exception" + str(e))
@Request.application
def application(request):
Debugg.info('App Started') # use Debugg
return Response(processRequest(request), mimetype='text/html')
# return processRequest(request)
if __name__ == '__main__':
application = SharedDataMiddleware(application, {
'/static': os.path.join(os.path.dirname(__file__), 'static')
})
try:
port = int(sys.argv[1])
except:
port = 4000
run_simple('localhost', port, application)