python kivy android app crashes after running apk on mobile device - java

I was trying to develop an android app using the kivy python framework. The program connects with a remote mysql database. A part of the code (registration and login page) was tested in pyCharm and found to be working perfectly. For converting to an android app, Ubuntu 19.10 OS running on Oracle VM VirtualBox was used. APK file was obtained by running command buildozer android debug. But on running the command buildozer android deploy run, the following output with error message comes and app crashes.
List of devices attached
ZX1PC222GV device
Run on ZX1PC222GV
Run '/home/nirmal/.buildozer/android/platform/android-sdk/platform-tools/adb shell am start -n org.test.kkfoodies/org.kivy.android.PythonActivity -a org.kivy.android.PythonActivity'
Cwd /home/nirmal/.buildozer/android/platform
Starting: Intent { act=org.kivy.android.PythonActivity
cmp=org.test.kkfoodies/org.kivy.android.PythonActivity }
Error type 3
Error: Activity class {org.test.kkfoodies/org.kivy.android.PythonActivity} does not exist.
Application started
Here is my buildozer.spec file
[app]
# (str) Title of your application
title = KK Foodies
# (str) Package name
package.name = kkfoodies
# (str) Package domain (needed for android/ios packaging)
package.domain = org.test
# (str) Source code where the main.py live
source.dir = .
# (list) Source files to include (let empty to include all the files)
source.include_exts = py,png,jpg,kv,atlas
# (list) List of inclusions using pattern matching
#source.include_patterns = assets/*,images/*.png
# (list) Source files to exclude (let empty to not exclude anything)
#source.exclude_exts = spec
# (list) List of directory to exclude (let empty to not exclude anything)
#source.exclude_dirs = tests, bin
# (list) List of exclusions using pattern matching
#source.exclude_patterns = license,images/*/*.jpg
# (str) Application versioning (method 1)
version = 1.0
# (str) Application versioning (method 2)
# version.regex = __version__ = ['"](.*)['"]
# version.filename = %(source.dir)s/main.py
# (list) Application requirements
# comma separated e.g. requirements = sqlite3,kivy
requirements = python3,kivy
# (str) Custom source folders for requirements
# Sets custom source for any requirements with recipes
# requirements.source.kivy = ../../kivy
# (list) Garden requirements
#garden_requirements =
# (str) Presplash of the application
#presplash.filename = %(source.dir)s/data/presplash.png
# (str) Icon of the application
#icon.filename = %(source.dir)s/data/icon.png
# (str) Supported orientation (one of landscape, sensorLandscape, portrait or all)
orientation = portrait
# (list) List of service to declare
#services = NAME:ENTRYPOINT_TO_PY,NAME2:ENTRYPOINT2_TO_PY
#
# OSX Specific
#
#
# author = © Copyright Info
# change the major version of python used by the app
osx.python_version = 3
# Kivy version to use
osx.kivy_version = 1.9.1
#
# Android specific
#
# (bool) Indicate if the application should be fullscreen or not
fullscreen = 0
# (string) Presplash background color (for new android toolchain)
# Supported formats are: #RRGGBB #AARRGGBB or one of the following names:
# red, blue, green, black, white, gray, cyan, magenta, yellow, lightgray,
# darkgray, grey, lightgrey, darkgrey, aqua, fuchsia, lime, maroon, navy,
# olive, purple, silver, teal.
#android.presplash_color = #FFFFFF
# (list) Permissions
#android.permissions = INTERNET
# (int) Target Android API, should be as high as possible.
#android.api = 27
# (int) Minimum API your APK will support.
android.minapi = 21
# (int) Android SDK version to use
#android.sdk = 20
# (str) Android NDK version to use
#android.ndk = 17c
# (int) Android NDK API to use. This is the minimum API your app will support, it should usually match android.minapi.
#android.ndk_api = 21
# (bool) Use --private data storage (True) or --dir public storage (False)
#android.private_storage = True
# (str) Android NDK directory (if empty, it will be automatically downloaded.)
#android.ndk_path =
# (str) Android SDK directory (if empty, it will be automatically downloaded.)
#android.sdk_path =
# (str) ANT directory (if empty, it will be automatically downloaded.)
#android.ant_path =
# (bool) If True, then skip trying to update the Android sdk
# This can be useful to avoid excess Internet downloads or save time
# when an update is due and you just want to test/build your package
# android.skip_update = False
# (bool) If True, then automatically accept SDK license
# agreements. This is intended for automation only. If set to False,
# the default, you will be shown the license when first running
# buildozer.
# android.accept_sdk_license = False
# (str) Android entry point, default is ok for Kivy-based app
#android.entrypoint = org.renpy.android.PythonActivity
# (str) Android app theme, default is ok for Kivy-based app
# android.apptheme = "#android:style/Theme.NoTitleBar"
# (list) Pattern to whitelist for the whole project
#android.whitelist =
# (str) Path to a custom whitelist file
#android.whitelist_src =
# (str) Path to a custom blacklist file
#android.blacklist_src =
# (list) List of Java .jar files to add to the libs so that pyjnius can access
# their classes. Don't add jars that you do not need, since extra jars can slow
# down the build process. Allows wildcards matching, for example:
# OUYA-ODK/libs/*.jar
#android.add_jars = foo.jar,bar.jar,path/to/more/*.jar
# (list) List of Java files to add to the android project (can be java or a
# directory containing the files)
#android.add_src =
# (list) Android AAR archives to add (currently works only with sdl2_gradle
# bootstrap)
#android.add_aars =
# (list) Gradle dependencies to add (currently works only with sdl2_gradle
# bootstrap)
#android.gradle_dependencies =
# (list) add java compile options
# this can for example be necessary when importing certain java libraries using the 'android.gradle_dependencies' option
# see https://developer.android.com/studio/write/java8-support for further information
# android.add_compile_options = "sourceCompatibility = 1.8", "targetCompatibility = 1.8"
# (list) Gradle repositories to add {can be necessary for some android.gradle_dependencies}
# please enclose in double quotes
# e.g. android.gradle_repositories = "maven { url 'https://kotlin.bintray.com/ktor' }"
#android.add_gradle_repositories =
# (list) packaging options to add
# see https://google.github.io/android-gradle- dsl/current/com.android.build.gradle.internal.dsl.PackagingOptions.html
# can be necessary to solve conflicts in gradle_dependencies
# please enclose in double quotes
# e.g. android.add_packaging_options = "exclude 'META- INF/common.kotlin_module'", "exclude 'META-INF/*.kotlin_module'"
#android.add_gradle_repositories =
# (list) Java classes to add as activities to the manifest.
#android.add_activites = com.example.ExampleActivity
# (str) OUYA Console category. Should be one of GAME or APP
# If you leave this blank, OUYA support will not be enabled
#android.ouya.category = GAME
# (str) Filename of OUYA Console icon. It must be a 732x412 png image.
#android.ouya.icon.filename = %(source.dir)s/data/ouya_icon.png
# (str) XML file to include as an intent filters in <activity> tag
#android.manifest.intent_filters =
# (str) launchMode to set for the main activity
#android.manifest.launch_mode = standard
# (list) Android additional libraries to copy into libs/armeabi
#android.add_libs_armeabi = libs/android/*.so
#android.add_libs_armeabi_v7a = libs/android-v7/*.so
#android.add_libs_arm64_v8a = libs/android-v8/*.so
#android.add_libs_x86 = libs/android-x86/*.so
#android.add_libs_mips = libs/android-mips/*.so
# (bool) Indicate whether the screen should stay on
# Don't forget to add the WAKE_LOCK permission if you set this to True
#android.wakelock = False
# (list) Android application meta-data to set (key=value format)
#android.meta_data =
# (list) Android library project to add (will be added in the
# project.properties automatically.)
#android.library_references =
# (list) Android shared libraries which will be added to AndroidManifest.xml using <uses-library> tag
#android.uses_library =
# (str) Android logcat filters to use
#android.logcat_filters = *:S python:D
# (bool) Copy library instead of making a libpymodules.so
#android.copy_libs = 1
# (str) The Android arch to build for, choices: armeabi-v7a, arm64-v8a, x86, x86_64
android.arch = armeabi-v7a
#
# Python for android (p4a) specific
#
# (str) python-for-android fork to use, defaults to upstream (kivy)
#p4a.fork = kivy
# (str) python-for-android branch to use, defaults to master
#p4a.branch = master
# (str) python-for-android git clone directory (if empty, it will be automatically cloned from github)
#p4a.source_dir =
# (str) The directory in which python-for-android should look for your own build recipes (if any)
#p4a.local_recipes =
# (str) Filename to the hook for p4a
#p4a.hook =
# (str) Bootstrap to use for android builds
# p4a.bootstrap = sdl2
# (int) port number to specify an explicit --port= p4a argument (eg for bootstrap flask)
#p4a.port =
#
# iOS specific
#
# (str) Path to a custom kivy-ios folder
#ios.kivy_ios_dir = ../kivy-ios
# Alternately, specify the URL and branch of a git checkout:
ios.kivy_ios_url = https://github.com/kivy/kivy-ios
ios.kivy_ios_branch = master
# Another platform dependency: ios-deploy
# Uncomment to use a custom checkout
#ios.ios_deploy_dir = ../ios_deploy
# Or specify URL and branch
ios.ios_deploy_url = https://github.com/phonegap/ios-deploy
ios.ios_deploy_branch = 1.7.0
# (str) Name of the certificate to use for signing the debug version
# Get a list of available identities: buildozer ios list_identities
#ios.codesign.debug = "iPhone Developer: <lastname> <firstname> (<hexstring>)"
# (str) Name of the certificate to use for signing the release version
#ios.codesign.release = %(ios.codesign.debug)s
[buildozer]
# (int) Log level (0 = error only, 1 = info, 2 = debug (with command output))
log_level = 2
# (int) Display warning if buildozer is run as root (0 = False, 1 = True)
warn_on_root = 1
# (str) Path to build artifact storage, absolute or relative to spec file
# build_dir = ./.buildozer
# (str) Path to build output (i.e. .apk, .ipa) storage
# bin_dir = ./bin
# -----------------------------------------------------------------------------
# List as sections
#
# You can define all the "list" as [section:key].
# Each line will be considered as a option to the list.
# Let's take [app] / source.exclude_patterns.
# Instead of doing:
#
#[app]
#source.exclude_patterns = license,data/audio/*.wav,data/images/original/*
#
# This can be translated into:
#
#[app:source.exclude_patterns]
#license
#data/audio/*.wav
#data/images/original/*
#
# -----------------------------------------------------------------------------
# Profiles
#
# You can extend section / key with a profile
# For example, you want to deploy a demo version of your application without
# HD content. You could first change the title to add "(demo)" in the name
# and extend the excluded directories to remove the HD content.
#
#[app#demo]
#title = My Application (demo)
#
#[app:source.exclude_patterns#demo]
#images/hd/*
#
# Then, invoke the command line with the "demo" profile:
#
#buildozer --profile demo android debug
The python file is given below.
from kivy.app import App
from kivy.properties import ObjectProperty
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.relativelayout import RelativeLayout
from kivy.uix.scrollview import ScrollView
from kivy.uix.label import Label
from kivy.uix.button import Button
from kivy.uix.togglebutton import ToggleButton
from kivy.uix.checkbox import CheckBox
from kivy.uix.spinner import Spinner
from kivy.properties import NumericProperty #, ListProperty
from kivy.uix.textinput import TextInput
from kivy.uix.popup import Popup
# from kivy.uix.bubble import Bubble
from kivy.uix.image import Image
from kivy.lang import Builder
import MySQLdb
import hashlib, binascii, os
from kivy.uix.screenmanager import ScreenManager, Screen
# from datetime import date, timedelta
from kivy.uix.popup import Popup
from datepicker import DatePicker # , CalendarWidget
import base64
from functools import partial
import textwrap
# import numpy as np
# import cv2
# import io
# import PIL.Image
#_imaging = PIL.Image.core
# from PIL import Image
# from PIL.Image import core as _imaging
# import Image
# import sys
# import cStringIO
# import timepicker
# from kivy.garden.circulardatetimepicker import CircularTimePicker
from kivy.core.window import Window
# Window.clearcolor = (204/255, 1, 244/255, 0)
class ScreenManagement(ScreenManager):
pass
myname = ''
selldate = ''
roomno = ''
try:
dbconnect = MySQLdb.connect("IP", "username", "password",
"dbname")
except (MySQLdb.Error) as e: # , MySQLdb.Warning
print("Can't connect to database", e)
exit()
# return 0
# If Connection Is Successful
# print("Connected")
crsr = dbconnect.cursor()
class ListHeader(Button):
def __init__(self, **kwargs):
super().__init__(**kwargs)
# bcolor = ListProperty([1, 1, 1, 1])
class ListCell(Label):
def __init__(self, **kwargs):
super().__init__(**kwargs)
# bcolor = ListProperty([1, 1, 1, 1])
class DbCon:
def __init__(self, **kwargs):
super().__init__(**kwargs)
def get_row(self, uname):
query = "SELECT username, passwordh, emp_no, full_name, room_no, authorisation_flag FROM residents WHERE username = '%s" % uname + "'"
# query = "SELECT userid, pass, mob, fname, lname, mailid FROM login_data WHERE userid = '%s" % uname + "'"
print(query)
crsr.execute(query)
return crsr.fetchone()
def add_row(self, username, password, empnum, fullname, roomnum):
hashedpwd = self.hash_password(password)
print(hashedpwd)
sqlquery = "INSERT INTO residents (username, passwordh, emp_no, full_name, room_no) VALUES (%s, %s, %s, %s, %s)"
insert_values = (username, hashedpwd, empnum, fullname, roomnum)
crsr.execute(sqlquery, insert_values)
dbconnect.commit()
print(crsr.rowcount, " record inserted.")
def hash_password(self, password):
"""Hash a password for storing."""
salt = hashlib.sha256(os.urandom(60)).hexdigest().encode('ascii')
pwdhash = hashlib.pbkdf2_hmac('sha512', password.encode('utf-8'),
salt, 10000)
pwdhash = binascii.hexlify(pwdhash)
return (salt + pwdhash).decode('ascii')
class LoginWindow(Screen):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.db = DbCon()
def validate_user(self):
user = self.ids.username_field
pwd = self.ids.pwd_field
info = self.ids.info
global myname, roomno
uname = user.text
passw = pwd.text
if uname == '' or passw == '':
info.text = '[color=#FF0000]username and/ or password required[/color]'
else:
row = self.db.get_row(uname)
if row == '':
info.text = '[color=#FF0000]Invalid Username and/or Password[/color]'
else:
stored_passwd = row[1]
myname = row[3]
roomno = row[4]
print(stored_passwd)
print(passw)
if self.verify_password(stored_passwd, passw):
# if stored_passwd == passw:
if row[5] == 1:
info.text = '[color=#00FF00]Logged In successfully!!![/color]'
self.parent.current = 'menu'
else:
info.text = '[color=#FF0000]Sorry, you are not authorised. Please collect authorisation details from administrator.[/color]'
else:
info.text = '[color=#FF0000]Incorrect Password[/color]'
def verify_password(self, stored_password, provided_password):
"""Verify a stored password against one provided by user"""
salt = stored_password[:64]
stored_password = stored_password[64:]
pwdhash = hashlib.pbkdf2_hmac('sha512',
provided_password.encode('utf-8'),
salt.encode('ascii'),
10000)
pwdhash = binascii.hexlify(pwdhash).decode('ascii')
print(pwdhash)
return pwdhash == stored_password
class RegisterWindow(Screen):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.db2 = DbCon()
def register_user(self):
user = self.ids.username_field
pwd = self.ids.pwd_field
rpt_pwd = self.ids.pwd_field_rpt
fname = self.ids.full_name
empnum = self.ids.emp_no
roomnum = self.ids.room_no
info = self.ids.info
uname = user.text
passw = pwd.text
rpassw = rpt_pwd.text
name = fname.text
enum = empnum.text
rnum = roomnum.text
unameokflag = False
passwokflag = False
nameokflag = False
enumokflag = False
rnumokflag = False
info.text = ''
if uname == '':
info.text += '[color=#FF0000]username required[/color]'
else:
unameokflag = True
if passw == '':
info.text += '\n[color=#FF0000]password required[/color]'
if rpassw == '':
info.text += '\n[color=#FF0000]repeat password required[/color]'
if name == '':
info.text += '\n[color=#FF0000]full name required[/color]'
else:
nameokflag = True
if enum == '':
info.text += '\n[color=#FF0000]mobile required[/color]'
elif len(enum) != 10 or enum.isdigit() != True:
info.text += '\n[color=#FF0000]not a valid mobile number[/color]'
else:
enumokflag = True
if rnum == '':
info.text += '\n[color=#FF0000]room number required[/color]'
else:
rnumokflag = True
if passw != '' and rpassw != '' and passw != rpassw:
info.text += '\n[color=#FF0000]passwords do not match[/color]'
else:
passwokflag = True
if unameokflag and passwokflag and nameokflag and enumokflag and rnumokflag:
self.db2.add_row(uname, passw, enum, name, rnum)
info.text += '\n[color=#FF0000]resident details successfully inserted[/color]'
class FoodiesApp(App):
def build(self):
return ScreenManagement()
if __name__=="__main__":
sa = FoodiesApp()
sa.run()
Kindly help me solve the issue.

Let me answer my own question. The problem is resolved. The error "Error type 3 Error: Activity class {org.test.kkfoodies/org.kivy.android.PythonActivity} does not exist." was causing utter confusion. This error was coming because the app was deployed on an android mobile phone where the minimum api requirement is not satisfied. (android.minapi = 21 option in buildozer spec file). Changing the option value to less than 21 also did not help as the buildozer version was not supporting deployment on older APIs.
The app was then tested on android phone which met the minimum api requirement. But the python library mysqldb was causing issues. mysqldb option was added in the requirements attribute and the recipe named mysqldb was tried. But, both the attempts failed.
Finally, the source code file main.py was modified -- mysql.connector library was used in place of MySQLdb. Also mysql_connector option was added in the requirements attribute of buildozer.spec file. That did the trick. The app is working smoothly on android phones now (Android version Lollipop and later). I thank every one of you for the help extended.

Related

Weka and unknown datatype

After successfully uploading mysql database into weka and applying a simple query, when I press ok, I get:
Couldn't read from database:
Unknown data type: INT. Add entry in weka/expirement/DatabaseUtils.props.
if the type contains blanks, either escape them with a backslash or use underscores instead of blanks"
I've searched effortlessly for a solution but nothing works.
I tried adding int=5 in the DatabaseUtlis.props file
I tried int_unsigned=5
my databaseutils.props file looks like this
# Database settings for MySQL 3.23.x, 4.x
#
# General information on database access can be found here:
# https://waikato.github.io/weka-wiki/databases/
#
# url: http://www.mysql.com/
# jdbc: http://www.mysql.com/products/connector/j/
# author: Fracpete (fracpete at waikato dot ac dot nz)
# version: $Revision: 15255 $
# JDBC driver (comma-separated list)
jdbcDriver=org.gjt.mm.mysql.Driver
# database URL
jdbcURL=jdbc:mysql://zalpha-db.cei00brrdcsc.eu-west-1.rds.amazonaws.com/mqdata
# specific data types
# string, getString() = 0; --> nominal
# boolean, getBoolean() = 1; --> nominal
# double, getDouble() = 2; --> numeric
# byte, getByte() = 3; --> numeric
# short, getByte()= 4; --> numeric
# int, getInteger() = 5; --> numeric
# long, getLong() = 6; --> numeric
# float, getFloat() = 7; --> numeric
# date, getDate() = 8; --> date
# text, getString() = 9; --> string
# time, getTime() = 10; --> date
# timestamp, getTime() = 11; --> date
INT = 5
# other options
CREATE_DOUBLE=DOUBLE
CREATE_STRING=TEXT
CREATE_INT=INT
CREATE_DATE=DATETIME
DateFormat=yyyy-MM-dd HH:mm:ss
checkUpperCaseNames=false
checkLowerCaseNames=false
checkForTable=true
# All the reserved keywords for this database
# Based on the keywords listed at the following URL (2009-04-13):
# http://dev.mysql.com/doc/mysqld-version-reference/en/mysqld-version-reference-reservedwords-5-0.html
Keywords=\
ADD,\
ALL,\
ALTER,\
ANALYZE,\
AND,\
AS,\
ASC,\
ASENSITIVE,\
BEFORE,\
BETWEEN,\
BIGINT,\
BINARY,\
BLOB,\
BOTH,\
BY,\
CALL,\
CASCADE,\
CASE,\
CHANGE,\
CHAR,\
CHARACTER,\
CHECK,\
COLLATE,\
COLUMN,\
COLUMNS,\
CONDITION,\
CONNECTION,\
CONSTRAINT,\
CONTINUE,\
CONVERT,\
CREATE,\
CROSS,\
CURRENT_DATE,\
CURRENT_TIME,\
CURRENT_TIMESTAMP,\
CURRENT_USER,\
CURSOR,\
DATABASE,\
DATABASES,\
DAY_HOUR,\
DAY_MICROSECOND,\
DAY_MINUTE,\
DAY_SECOND,\
DEC,\
DECIMAL,\
DECLARE,\
DEFAULT,\
DELAYED,\
DELETE,\
DESC,\
DESCRIBE,\
DETERMINISTIC,\
DISTINCT,\
DISTINCTROW,\
DIV,\
DOUBLE,\
DROP,\
DUAL,\
EACH,\
ELSE,\
ELSEIF,\
ENCLOSED,\
ESCAPED,\
EXISTS,\
EXIT,\
EXPLAIN,\
FALSE,\
FETCH,\
FIELDS,\
FLOAT,\
FLOAT4,\
FLOAT8,\
FOR,\
FORCE,\
FOREIGN,\
FROM,\
FULLTEXT,\
GOTO,\
GRANT,\
GROUP,\
HAVING,\
HIGH_PRIORITY,\
HOUR_MICROSECOND,\
HOUR_MINUTE,\
HOUR_SECOND,\
IF,\
IGNORE,\
IN,\
INDEX,\
INFILE,\
INNER,\
INOUT,\
INSENSITIVE,\
INSERT,\
INT,\
INT1,\
INT2,\
INT3,\
INT4,\
INT8,\
INTEGER,\
INTERVAL,\
INTO,\
IS,\
ITERATE,\
JOIN,\
KEY,\
KEYS,\
KILL,\
LABEL,\
LEADING,\
LEAVE,\
LEFT,\
LIKE,\
LIMIT,\
LINES,\
LOAD,\
LOCALTIME,\
LOCALTIMESTAMP,\
LOCK,\
LONG,\
LONGBLOB,\
LONGTEXT,\
LOOP,\
LOW_PRIORITY,\
MATCH,\
MEDIUMBLOB,\
MEDIUMINT,\
MEDIUMTEXT,\
MIDDLEINT,\
MINUTE_MICROSECOND,\
MINUTE_SECOND,\
MOD,\
MODIFIES,\
NATURAL,\
NOT,\
NO_WRITE_TO_BINLOG,\
NULL,\
NUMERIC,\
ON,\
OPTIMIZE,\
OPTION,\
OPTIONALLY,\
OR,\
ORDER,\
OUT,\
OUTER,\
OUTFILE,\
PRECISION,\
PRIMARY,\
PRIVILEGES,\
PROCEDURE,\
PURGE,\
READ,\
READS,\
REAL,\
REFERENCES,\
REGEXP,\
RELEASE,\
RENAME,\
REPEAT,\
REPLACE,\
REQUIRE,\
RESTRICT,\
RETURN,\
REVOKE,\
RIGHT,\
RLIKE,\
SCHEMA,\
SCHEMAS,\
SECOND_MICROSECOND,\
SELECT,\
SENSITIVE,\
SEPARATOR,\
SET,\
SHOW,\
SMALLINT,\
SONAME,\
SPATIAL,\
SPECIFIC,\
SQL,\
SQLEXCEPTION,\
SQLSTATE,\
SQLWARNING,\
SQL_BIG_RESULT,\
SQL_CALC_FOUND_ROWS,\
SQL_SMALL_RESULT,\
SSL,\
STARTING,\
STRAIGHT_JOIN,\
TABLE,\
TABLES,\
TERMINATED,\
THEN,\
TINYBLOB,\
TINYINT,\
TINYTEXT,\
TO,\
TRAILING,\
TRIGGER,\
TRUE,\
UNDO,\
UNION,\
UNIQUE,\
UNLOCK,\
UNSIGNED,\
UPDATE,\
UPGRADE,\
USAGE,\
USE,\
USING,\
UTC_DATE,\
UTC_TIME,\
UTC_TIMESTAMP,\
VALUES,\
VARBINARY,\
VARCHAR,\
VARCHARACTER,\
VARYING,\
WHEN,\
WHERE,\
WHILE,\
WITH,\
WRITE,\
XOR,\
YEAR_MONTH,\
ZEROFILL
# The character to append to attribute names to avoid exceptions due to
# clashes between keywords and attribute names
KeywordsMaskChar=_
#flags for loading and saving instances using DatabaseLoader/Saver
nominalToStringLimit=50
idColumn=auto_generated_id
Anyone who's solved this issue or may know how to?
If that error message pops up, it means int datatype is not recognized. in order to fix this, you have to verify your databaseutils.prop file and add; INT=5 and INT_UNSIGNED=5. Note that you have to do that in the properties file and not the mysql type file.

Has anyone successfully use JPype to load the Netflix photon classes?

I built the Netflix Photon docker image from https://github.com/Netflix/photon and it works as in I am able to launch a container and run the provided java applications.
On top of this I installed Python3, gcc, and JPype1-py3 but am unable to load the Photon java classes.
I can launch the JVM successfully using:
startJVM(getDefaultJVMPath(), "-ea", "-Djava.class.path=/source/build/libs")
java.lang.System.out.println("hello world")
Hello World
So I know the JVM itself is working but whenever I try to load a class from Photon I get an error:
>>> s = JClass("com.netflix.imflibrary.st2067_2.ImpAsset")
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python3.5/dist-packages/jpype/_jclass.py", line 55, in JClass
raise _RUNTIMEEXCEPTION.PYEXEC("Class %s not found" % name)
jpype._jexception.ExceptionPyRaisable: java.lang.Exception: Class com.netf;ox/imflibrary.st2067_2.IMPAsset not found
Has anyone been able to integrate directly with the Netflix photon classes using JPype? I would rather not be limited to running the provided applications through subprocess.
crickets!??
Ok, I figured it out anyway, had to load the jar files like this:
try:
from jpype import *
classpath="/source/build/libs/Photon-0.1.0-SNAPSHOT.jar:/source/build/libs/log4j-1.2.17.jar:/source/build/libs/regxmllib-1.1.1.jar:/source/build/libs/slf4j-log4j12-1.7.25.jar:/source/build/libs/jsr305-3.0.1.jar:/source/build/libs/log4j.properties:/source/build/libs/slf4j-api-1.7.25.jar"
startJVM(getDefaultJVMPath(), "-Djava.class.path=%s" % classpath)
print("JVM started: ",getDefaultJVMPath())
print("classpath=",classpath)
except Exception as e:
print("error launching JVM:", traceback.format_exc())
exit()
print("Starting scan of",scanfolder)
IMPAnalyzer = JClass("com.netflix.imflibrary.app.IMPAnalyzer")
IMPFile = java.io.File(scanfolder)
error_fatal = 0
error_nonfatal = 0
error_warning = 0
if IMPFile.isDirectory():
result_dict = {}
IMPresult_iterator = IMPAnalyzer.analyzePackage(IMPFile).entrySet().iterator()
while IMPresult_iterator.hasNext():
resultpair = IMPresult_iterator.next()
# print(resultpair.getKey(),":")
if len(resultpair.getValue()) > 0:
error_list = []
list_iterator = resultpair.getValue().iterator()
while list_iterator.hasNext():
errorobject = list_iterator.next()
error_list.append(str(errorobject.errorLevel) + ":" + str(errorobject.errorCode) + ":" + errorobject.toString())
if str(errorobject.errorLevel) == "WARNING":
error_warning += 1
elif str(errorobject.errorLevel) == "NON FATAL":
error_nonfatal += 1
elif str(errorobject.errorLevel) == "FATAL":
error_fatal += 1
result_dict[resultpair.getKey()] = error_list
else:
result_dict[resultpair.getKey()]='Ok'
print(scanfolder,"scanned with",error_fatal,"fatal error(s),",error_nonfatal,"nonfatal error(s), and",error_warning,"warning(s)")
pprint.pprint(result_dict)
else:
print(scanfolder,"does not appear to be a valid folder")

Microservice communication with python in Asynchronous manner

I want to trigger Python script from my Spring boot microservices im Asynchronous manner, SO that my Microservice will be notified once the execution of python script completes.Can any one suggest the best approach for this? appreciated if any one provide some reference to sample code.
Thanks in advance!!!
Thanks,
Sudheer
here is very good Example for something like that:
Source: http://code.activestate.com/recipes/511454-an-asynchronous-http-server-with-cgi-support/
import SimpleAsyncServer
# =============================================================
# An implementation of the HTTP protocol, supporting persistent
# connections and CGI
# =============================================================
import sys
import os
import traceback
import datetime
import mimetypes
import urlparse
import urllib
import cStringIO
class HTTP(SimpleAsyncServer.ClientHandler):
# parameters to override if necessary
root = os.getcwd() # the directory to serve files from
cgi_directories = ['/cgi-bin'] # subdirectories for cgi scripts
logging = True # print logging info for each request ?
blocksize = 2 << 16 # size of blocks to read from files and send
def request_complete(self):
"""In the HTTP protocol, a request is complete if the "end of headers"
sequence ('\r\n\r\n') has been received
If the request is POST, stores the request body in a StringIO before
returning True"""
terminator = self.incoming.find('\r\n\r\n')
if terminator == -1:
return False
lines = self.incoming[:terminator].split('\r\n')
self.requestline = lines[0]
try:
self.method,self.url,self.protocol = lines[0].strip().split()
except:
self.method = None # indicates bad request
return True
# put request headers in a dictionary
self.headers = {}
for line in lines[1:]:
k,v = line.split(':',1)
self.headers[k.lower().strip()] = v.strip()
# persistent connection
close_conn = self.headers.get("connection","")
if (self.protocol == "HTTP/1.1"
and close_conn.lower() == "keep-alive"):
self.close_when_done = False
# parse the url
scheme,netloc,path,params,query,fragment = urlparse.urlparse(self.url)
self.path,self.rest = path,(params,query,fragment)
if self.method == 'POST':
# for POST requests, read the request body
# its length must be specified in the content-length header
content_length = int(self.headers.get('content-length',0))
body = self.incoming[terminator+4:]
# request is incomplete if not all message body received
if len(body)<content_length:
return False
f_body = cStringIO.StringIO(body)
f_body.seek(0)
sys.stdin = f_body # compatibility with CGI
return True
def make_response(self):
"""Build the response : a list of strings or files"""
if self.method is None: # bad request
return self.error_resp(400,'Bad request : %s' %self.requestline)
resp_headers, resp_body, resp_file = '','',None
if not self.method in ['GET','POST','HEAD']:
return self.err_resp(501,'Unsupported method (%s)' %self.method)
else:
file_name = self.file_name = self.translate_path()
if not os.path.exists(file_name):
return self.err_resp(404,'File not found')
elif self.managed():
response = self.mngt_method()
else:
ext = os.path.splitext(file_name)[1]
c_type = mimetypes.types_map.get(ext,'text/plain')
resp_line = "%s 200 Ok\r\n" %self.protocol
size = os.stat(file_name).st_size
resp_headers = "Content-Type: %s\r\n" %c_type
resp_headers += "Content-Length: %s\r\n" %size
resp_headers += '\r\n'
if self.method == "HEAD":
resp_string = resp_line + resp_headers
elif size > HTTP.blocksize:
resp_string = resp_line + resp_headers
resp_file = open(file_name,'rb')
else:
resp_string = resp_line + resp_headers + \
open(file_name,'rb').read()
response = [resp_string]
if resp_file:
response.append(resp_file)
self.log(200)
return response
def translate_path(self):
"""Translate URL path into a path in the file system"""
return os.path.join(HTTP.root,*self.path.split('/'))
def managed(self):
"""Test if the request can be processed by a specific method
If so, set self.mngt_method to the method used
This implementation tests if the script is in a cgi directory"""
if self.is_cgi():
self.mngt_method = self.run_cgi
return True
return False
def is_cgi(self):
"""Test if url in a cgi directory"""
for path in self.cgi_directories:
if self.path.startswith(path):
rest = self.path[len(path):]
if not rest or rest.startswith('/'):
return True
return False
def run_cgi(self):
# set CGI environment variables
self.make_cgi_env()
# redirect print statements to a cStringIO
save_stdout = sys.stdout
sys.stdout = cStringIO.StringIO()
# run the script
try:
execfile(self.file_name)
except:
sys.stdout = cStringIO.StringIO()
sys.stdout.write("Content-type:text/plain\r\n\r\n")
traceback.print_exc(file=sys.stdout)
response = sys.stdout.getvalue()
if self.method == "HEAD":
# for HEAD request, don't send message body even if the script
# returns one (RFC 3875)
head_lines = []
for line in response.split('\n'):
if not line:
break
head_lines.append(line)
response = '\n'.join(head_lines)
sys.stdout = save_stdout # restore sys.stdout
# close connection in case there is no content-length header
self.close_when_done = True
resp_line = "%s 200 Ok\r\n" %self.protocol
return [resp_line + response]
def make_cgi_env(self):
"""Set CGI environment variables"""
env = {}
env['SERVER_SOFTWARE'] = "AsyncServer"
env['SERVER_NAME'] = "AsyncServer"
env['GATEWAY_INTERFACE'] = 'CGI/1.1'
env['DOCUMENT_ROOT'] = HTTP.root
env['SERVER_PROTOCOL'] = "HTTP/1.1"
env['SERVER_PORT'] = str(self.server.port)
env['REQUEST_METHOD'] = self.method
env['REQUEST_URI'] = self.url
env['PATH_TRANSLATED'] = self.translate_path()
env['SCRIPT_NAME'] = self.path
env['PATH_INFO'] = urlparse.urlunparse(("","","",self.rest[0],"",""))
env['QUERY_STRING'] = self.rest[1]
if not self.host == self.client_address[0]:
env['REMOTE_HOST'] = self.host
env['REMOTE_ADDR'] = self.client_address[0]
env['CONTENT_LENGTH'] = str(self.headers.get('content-length',''))
for k in ['USER_AGENT','COOKIE','ACCEPT','ACCEPT_CHARSET',
'ACCEPT_ENCODING','ACCEPT_LANGUAGE','CONNECTION']:
hdr = k.lower().replace("_","-")
env['HTTP_%s' %k.upper()] = str(self.headers.get(hdr,''))
os.environ.update(env)
def err_resp(self,code,msg):
"""Return an error message"""
resp_line = "%s %s %s\r\n" %(self.protocol,code,msg)
self.close_when_done = True
self.log(code)
return [resp_line]
def log(self,code):
"""Write a trace of the request on stderr"""
if HTTP.logging:
date_str = datetime.datetime.now().strftime('[%d/%b/%Y %H:%M:%S]')
sys.stderr.write('%s - - %s "%s" %s\n' %(self.host,
date_str,self.requestline,code))
if __name__=="__main__":
# launch the server on the specified port
port = 8081
print "Asynchronous HTTP server running on port %s" %port
print "Press Ctrl+C to stop"
server = SimpleAsyncServer.Server('', port)
HTTP.logging = False
try:
SimpleAsyncServer.loop(server,HTTP)
except KeyboardInterrupt:
for s in server.client_handlers:
server.close_client(s)
print 'Ctrl+C pressed. Closing'
One way of doing asynchronous execution in Python would be to use the celery framework. It's really simple to install and setup (basically just pip install), and the semantic for calling a method asynchronously is super clean.
If you are not too bound to Spring you could even switch to the pymacaron microservice framework (basically a flask app that uses swagger to spawn a REST API). Pymacaron (http://pymacaron.com/) supports asynchronous calls by default, via the pymacaron-async module. See the examples here: http://pymacaron.com/async.html

How to Save the the .msi file using selenium web driver [duplicate]

I need to download a file to a given location on a non-local machine. This is the normal flow of the web browser for which I would do this:
Go to website
Click button to download file (it is a form that generates the file, it is not a download link)
The website prompts an alert window "Do you want to download this file?", etc.
I want to be able to bypass the file and do something like:
>>> path_to_download_path = PATH
>>> button = driver.find_element_by_css("...")
>>> button.click()
--> And the file is automatically downloaded to my PATH (or wherever I choose)
Or is there an easier way that click, where I can automatically download the content of the file?
How would I do this?
You would have to examine the javascript on the website and understand how it works before you could override it to do something like that, but even then, browser security will always pop a dialog asking you to confirm the download. That leaves you with two options (as far as I can see):
Confirm the alert dialog
Determine the location of the file on the remote server, and use a GET to download the file
I can't really help with the details on either, since I don't know python, but hopefully that helps...
Use selenium webdriver
Use firefox profile to download your files. This profile skip that dialogue box of firefox.
In line:-
pro.setPreference("browser.downLoad.folderList", 0);
The value of browser.download.folderList can be set to either 0, 1, or 2. When set to 0, Firefox will save all files downloaded via the browser on the user's desktop. When set to 1, these downloads are stored in the Downloads folder. When set to 2, the location specified for the most recent download is utilized again.
Firefox profile code that you need to implement :-
FirefoxProfile pro=new FirefoxProfile();
pro.setPreference("browser.downLoad.folderList", 0);
pro.setPreference("browser.helperApps.neverAsk.saveToDisk", "Applications/zip");
WebDriver driver=new FirefoxDriver(pro);
driver.get("http://selenium-release.storage.googleapis.com/2.47/selenium-java-2.47.1.zip");
Hope it will help you :)
When you initialize your driver, be sure to set the download preferences.
For Firefox:
ff_prof.set_preference( "browser.download.manager.showWhenStarting", False )
ff_prof.set_preference( "browser.download.folderList", 2 )
ff_prof.set_preference( "browser.download.useDownloadDir", True )
ff_prof.set_preference( "browser.download.dir", self.driver_settings['download_folder'] )
##
# if FF still shows the download dialog, make sure that the filetype is included below
# filetype string options can be found in '~/.mozilla/$USER_PROFILE/mimeTypes.rdf'
##
mime_types = ("application/pdf", "text/html")
ff_prof.set_preference( "browser.helperApps.neverAsk.saveToDisk", (", ".join( mime_types )) )
ff_prof.set_preference( "browser.helperApps.neverAsk.openFile", (", ".join( mime_types )) )
For Chrome:
capabilities['chromeOptions']['prefs']['download.prompt_for_download'] = False
capabilities['chromeOptions']['prefs']['download.default_directory'] = self.driver_settings['download_folder']
Forwarding the download:
Below is the code I use to redirect the file from self.driver_settings['download_folder'] (set above) to where you actually want the file (to_path can be an existing folder or a filepath). If you're on linux, I'd suggest using tmpfs so that /tmp is held in ram and then set self.driver_settings['download_folder'] to "/tmp/driver_downloads/". Note that the below function assumes that self.driver_settings['download_folder'] always begins as an empty folder (this is how it locates the file being downloaded, since it's the only one in the directory).
def moveDriverDownload(self, to_path, allowable_extensions, allow_rename_if_exists=False, timeout_seconds=None):
if timeout_seconds is None:
timeout_seconds = 30
wait_delta = timedelta( seconds=timeout_seconds )
start_download_time = datetime.now()
hasTimedOut = lambda: datetime.now() - start_download_time > wait_delta
assert isinstance(allowable_extensions, list) or isinstance(allowable_extensions, tuple) or isinstance(allowable_extensions, set), "instead of a list, found allowable_extensions type of '{}'".format(type(allowable_extensions))
allowable_extensions = [ elem.lower().strip() for elem in allowable_extensions ]
allowable_extensions = [ elem if elem.startswith(".") else "."+elem for elem in allowable_extensions ]
if not ".part" in allowable_extensions:
allowable_extensions.append( ".part" )
re_extension_str = "(?:" + ("$)|(?:".join( re.escape(elem) for elem in allowable_extensions )) + "$)"
getFiles = lambda: next( os.walk( self.driver_settings['download_folder'] ) )[2]
while True:
if hasTimedOut():
del allowable_extensions[ allowable_extensions.index(".part") ]
raise DownloadTimeoutError( "timed out after {} seconds while waiting on file download with extension in {}".format(timeout_seconds, allowable_extensions) )
time.sleep( 0.5 )
file_list = [ elem for elem in getFiles() if re.search( re_extension_str, elem ) ]
if len(file_list) > 0:
break
file_list = [ re.search( r"(?i)^(.*?)(?:\.part)?$", elem ).groups()[0] for elem in file_list ]
if len(file_list) > 1:
if len(file_list) == 2:
if file_list[0] != file_list[1]:
raise Exception( "file_list[0] != file_list[1] <==> {} != {}".format(file_list[0], file_list[1]) )
else:
raise Exception( "len(file_list) > 1. found {}".format(file_list) )
file_path = "%s%s" %(self.driver_settings['download_folder'], file_list[0])
# see if the file is still being downloaded by checking if it's open by any programs
if platform.system() == "Linux":
openProcess = lambda: subprocess.Popen( 'lsof | grep "%s"' %file_path, shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE, stderr=subprocess.PIPE )
fileIsFinished = lambda txt: txt.strip() == ""
elif platform.system() == "Windows":
# 'handle' program must be in PATH
# https://technet.microsoft.com/en-us/sysinternals/bb896655
openProcess = lambda: subprocess.Popen( 'handle "%s"' %file_path.replace("/", "\\"), shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE, stderr=subprocess.PIPE )
fileIsFinished = lambda txt: bool( re.search("(?i)No matching handles found", txt) )
else:
raise Exception( "unrecognised platform.system() of '{}'".format(platform.system()) )
while True:
lsof_process = openProcess()
lsof_result = lsof_process.communicate()
if len(lsof_result) != 2:
raise Exception( "len(lsof_result) != 2. found {}".format(lsof_result) )
if lsof_result[1].strip() != "":
raise Exception( 'lsof_result[1].strip() != "". found {}'.format(lsof_result) )
if fileIsFinished( lsof_result[0] ):
break
if hasTimedOut():
raise Exception( "timed out after {} seconds waiting for '{}' to be freed from writing. found lsof/handle of '{}'".format(timeout_seconds, file_path, lsof_result[0]) )
time.sleep( 0.5 )
to_path = to_path.replace("\\", "/")
if os.path.isdir( to_path ):
if not to_path.endswith("/"):
to_path += "/"
to_path += file_list[0]
i = 2
while os.path.exists( to_path ):
if not allow_rename_if_exists:
raise Exception( "{} already exists".format(to_path) )
to_path = re.sub( "^(.*/)(.*?)(?:-" + str(i-1) + r")?(|\..*?)?$", r"\1\2-%i\3" %i, to_path )
i += 1
shutil.move( file_path, to_path )
return to_path[ to_path.rindex("/")+1: ]

How to configure the on your server spotlight to give the same output as the spotlight demo on the web?

I am using the run on your server spotlight. but couldn't configure the properties file so it will output the same output as the demo does.
here is the demo screen shot shows the parameters it uses:
which are look like this (from the file server.properties which is locally on my machine):
org.dbpedia.spotlight.web.rest.uri = http://localhost:2222/rest
org.dbpedia.spotlight.index.dir = data/index
org.dbpedia.spotlight.spot.dictionary = data/spotter.dict
jcs.default.cacheattributes.MaxObjects = 5000
org.dbpedia.spotlight.tagging.hmm = data/pos-en-general-brown.HiddenMarkovModel
org.dbpedia.spotlight.sparql.endpoint = http://dbpedia.org/sparql
org.dbpedia.spotlight.sparql.graph = http://dbpedia.org
# Configurations for the CoOccurrenceBasedSelector
# From: http://spotlight.dbpedia.org/download/release-0.5/spot_selector.tgz
# org.dbpedia.spotlight.spot.cooccurrence.datasource = ukwac
# org.dbpedia.spotlight.spot.cooccurrence.database.jdbcdriver = org.hsqldb.jdbcDriver
# org.dbpedia.spotlight.spot.cooccurrence.database.connector = jdbc:hsqldb:file:data/spotsel/ukwac_candidate;shutdown=true&readonly=true
# org.dbpedia.spotlight.spot.cooccurrence.database.user = sa
# org.dbpedia.spotlight.spot.cooccurrence.database.password =
# org.dbpedia.spotlight.spot.cooccurrence.classifier.unigram = data/spotsel/ukwac_unigram.model
# org.dbpedia.spotlight.spot.cooccurrence.classifier.ngram = data/spotsel/ukwac_ngram.model
# Other possible values: AtLeastOneNounSelector,CoOccurrenceBasedSelector,NESpotter
org.dbpedia.spotlight.spot.spotters = LingPipeSpotter
# org.dbpedia.spotlight.spot.opennlp.dir = opennlp
# Info for context searcher
org.dbpedia.spotlight.language = English
org.dbpedia.spotlight.lucene.analyzer = SnowballAnalyzer
# Choose between jdbc or lucene for DBpedia Resource creation. Also, if the jdbc throws an error, lucene will be used.
# org.dbpedia.spotlight.core.database = jdbc
# org.dbpedia.spotlight.core.database.jdbcdriver = org.hsqldb.jdbcDriver
# org.dbpedia.spotlight.core.database.connector = jdbc:hsqldb:file:data/database/spotlight-db;shutdown=true&readonly=true
# org.dbpedia.spotlight.core.database.user = sa
# org.dbpedia.spotlight.core.database.password =
# List of disambiguators to load: Document,Occurrences,CuttingEdge,Default
org.dbpedia.spotlight.disambiguate.disambiguators = Default,Document
# From http://spotlight.dbpedia.org/download/release-0.5/candidate-index-full.tgz
# org.dbpedia.spotlight.candidateMap.dir = /fastdata/spotlight/3.7/candidateIndexTitRedDis
The quickstart comes with tiny versions of index and spotter.dict.
If you want the same results as our demo webserver, you need to download the larger files with several gigabytes.
You can either overwrite your index and spotter.dict, our change the config to point to the new files.
See http://github.com/dbpedia-spotlight/dbpedia-spotlight/wiki/Downloads

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