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"""
Import data from a XHTML file to a KexiDB table.
Description:
This script implements import of data from a XHTML file to a KexiDB table. The
table needs to be an already existing table the data should be added to.
Author:
Sebastian Sauer <mail@dipe.org>
Copyright:
Dual-licensed under LGPL v2+higher and the BSD license.
"""
class SaxInput:
""" The inputsource we like to import the data from. This class
provides us abstract access to the SAX XML parser we use internaly
to import data from the XML-file. """
xmlfile = None
""" The XML file we should read the content from. """
def __init__(self):
""" Constructor. """
# try to import the xml.sax python module.
try:
import xml.sax.saxlib
import xml.sax.saxexts
except:
raise Exception("Import of the python xml.sax.saxlib module failed. This module is needed by the ImportXHTML python script.")
def read(self, outputwriter):
""" Start reading and parsing the XML-file. """
import xml.sax.saxlib
import xml.sax.saxexts
class SaxHandler(xml.sax.saxlib.HandlerBase):
""" The SaxHandler is our event-handler SAX calls on
parsing the XML-file. """
tablebase = ["html","body","table"]
""" The table-base defines where we will find our table-tag
that holds all the data we are interessted at. The default
is to look at <html><body><table></table></body></html>. """
def __init__(self, inputreader, outputwriter):
""" Constructor. """
# The to a SaxInput instance pointing inputreader.
self.inputreader = inputreader
# The to a KexiDBOutput instance pointing outputwriter.
self.outputwriter = outputwriter
# The hierachy-level in the DOM-tree we are in.
self.level = 0
# Defines if we are in the with tablebase defined DOM-element.
self.intable = False
# Points to a KexiDBOutput.Record instance if we are in a DOM-element that defines a record.
self.record = None
# Points to a KexiDBOutput.Field instance if we are in a record's field.
self.field = None
def startDocument(self):
sys.stdout.write('=> Starting parsing\n')
def endDocument(self):
sys.stdout.write('=> Fineshed parsing\n')
def startElement(self, name, attrs):
""" This method is called by SAX if a DOM-element starts. """
if self.level < len(self.tablebase):
if self.tablebase[self.level] != name:
self.intable = False
else:
self.intable = True
self.level += 1
if not self.intable:
return
# Print some debugging-output to stdout.
for idx in range(self.level): sys.stdout.write(' ')
sys.stdout.write('Element: %s' % name)
for attrName in list(attrs.keys()):
sys.stdout.write(' %s="%s"' % (attrName,attrs.get(attrName)))
sys.stdout.write('\n')
# handle tr-, th- and td-tags inside the table.
if name == "tr" and (self.level == len(self.tablebase) + 1):
self.record = self.outputwriter.Record()
elif name == "td" and (self.level == len(self.tablebase) + 2):
self.field = self.outputwriter.Field()
elif name == "th" and (self.level == len(self.tablebase) + 2):
self.field = self.outputwriter.Field()
def endElement(self, name):
""" This method is called by SAX if a DOM-Element ends. """
self.level -= 1
#sys.stdout.write('EndElement:%s level:%s len(self.tablebase):%s\n' % (name,self.level,len(self.tablebase)))
if self.record != None:
# a record is defined. so, we are looking for the matching
# end-tags to close a record or a field.
if name == "tr" and (self.level == len(self.tablebase)):
self.outputwriter.write(self.record)
self.record = None
self.field = None
elif name == "td" and (self.level == len(self.tablebase) + 1):
#if self.field == None:
# raise Exception("Unexpected closing </td>")
self.record.setField( self.field )
self.field = None
elif name == "th" and (self.level == len(self.tablebase) + 1):
#if self.field == None:
# raise Exceptin("Unexpected closing </td>")
self.record.setHeader( self.field )
self.field = None
def characters(self, chars, offset, length):
""" This method is called by SAX if the text-content of a DOM-Element
was parsed. """
if self.field != None:
# the xml-data is unicode and we need to encode it
# to latin-1 cause KexiDB deals only with latin-1.
u = str(chars[offset:offset+length])
self.field.append(u.encode("latin-1"))
# start the job
outputwriter.begin()
# create saxhandler to handle parsing events.
handler = SaxHandler(self, outputwriter)
# we need a sax-parser and connect it with the handler.
parser = xml.sax.saxexts.make_parser()
parser.setDocumentHandler(handler)
# open the XML-file, parse the content and close the file again.
f = file(self.xmlfile, 'r')
parser.parseFile(f)
f.close()
# job is done
outputwriter.end()
class KexiDBOutput:
""" The destination target we like to import the data to. This class
provides abstract access to the KexiDB module. """
class Result:
""" Holds some informations about the import-result. """
def __init__(self, outputwriter):
self.outputwriter = outputwriter
# number of records successfully imported.
self.successcount = 0
# number of records where import failed.
self.failedcount = 0
def addLog(self, record, state):
import datetime
date = datetime.datetime.now().strftime("%Y-%m-%d %H:%M.%S")
self.outputwriter.logfile.write("%s (%s) %s\n" % (date,state,str(record)))
def success(self, record):
""" Called if a record was written successfully. """
print("SUCCESS: %s" % str(record))
self.successcount += 1
if hasattr(self.outputwriter,"logfile"):
self.addLog(record, "Success")
def failed(self, record):
""" Called if we failed to write a record. """
print("FAILED: %s" % str(record))
self.failedcount += 1
if hasattr(self.outputwriter,"logfile"):
self.addLog(record, "Failed")
class Record:
""" A Record in the dataset. """
def __init__(self):
self.fields = []
def setHeader(self, headerfield):
self.fields.append( headerfield )
self.isHeader = True
def setField(self, field):
self.fields.append( field )
def __str__(self):
s = "["
for f in self.fields:
s += "%s, " % str(f)
return s + "]"
class Field:
""" A field in a record. """
def __init__(self):
self.content = []
def append(self, content):
self.content.append( content )
def __str__(self):
return "".join(self.content)
def __init__(self):
""" Constructor. """
import kexiapp
keximainwindow = kexiapp.get("KexiAppMainWindow")
try:
self.connection = keximainwindow.getConnection()
except:
raise Exception("No connection established. Please open a project before.")
self.fieldlist = None
self.headerrecord = None
self.mapping = {}
def begin(self):
""" Called before parsing starts. """
print("START JOB")
if self.fieldlist == None:
raise Exceptin("Invalid tableschema or fieldlist!")
global KexiDBOutput
self.result = KexiDBOutput.Result(self)
if hasattr(self,"logfilename") and self.logfilename != None and self.logfilename != "":
self.logfile = open(self.logfilename,'w')
def end(self):
""" Called if parsing is fineshed. """
print("END JOB")
self.logfile = None
self.mapping = {}
#self.headerrecord = None
def getTables(self):
""" return a list of avaiable tablenames. """
tables = self.connection.tableNames()
tables.sort()
return tables
def setTable(self, tablename):
""" Set the tablename we like to import the data to. """
tableschema = self.connection.tableSchema(tablename)
if tableschema == None:
raise Exceptin("There exists no table with the name '%s'!" % tablename)
self.fieldlist = tableschema.fieldlist()
fields = self.fieldlist.fields()
for field in fields:
print("KexiDBOutput.setTable(%s): %s(%s)" % (tablename,field.name(),field.type()))
print("names=%s" % self.fieldlist.names())
def setMapping(self, mapping):
""" Set the tablefieldname=xmlcolnr dictonary we should map the data to. """
self.mapping = mapping
def setLogFile(self, logfilename):
""" Set the name of the logfile. """
self.logfilename = logfilename
def write(self, record):
""" Write the record to the KexiDB table. """
if hasattr(record, "isHeader"):
self.headerrecord = record
return
sys.stdout.write('KexiDBOutput.write:')
for f in record.fields:
sys.stdout.write(' "%s"' % f)
sys.stdout.write('\n')
if hasattr(self,"onWrite"):
if not self.onWrite(record):
raise RuntimeError()
delattr(self,"onWrite")
self.fieldlist = self.fieldlist.subList( list( self.mapping ) )
# Translate a KexiDBOutput.Record into a list of values.
values = []
for k in self.fieldlist.names():
values.append( str(record.fields[ int(self.mapping[k]) ]) )
print("Import values: %s" % values)
try:
if self.connection.insertRecord(self.fieldlist, values):
self.result.success(record)
else:
self.result.failed(record)
except:
err = self.connection.lastError()
raise Exception( "Failed to insert the record:\n%s\n\n%s" % (values,err) )
#raise Exception( "Failed to insert into table \"%s\" the record:\n%s\n%s" % (self.tableschema.name(),values,self.connection.lastError()) )
class GuiApp:
""" The GUI-dialog displayed to let the user define the source
XML-file and the destination KexiDB table. """
class InitialDialog:
def __init__(self, guiapp):
self.guiapp = guiapp
self.ok = False
import gui
self.dialog = gui.Dialog("Import XHTML")
self.dialog.addLabel(self.dialog, "Import data from a XHTML-file to a KexiDB table.\n"
"The destination table needs to be an existing table the data should be added to.")
self.importfile = self.dialog.addFileChooser(self.dialog,
"Source File:",
gui.getHome() + "/kexidata.xhtml",
(('XHTML files', '*.xhtml'),('All files', '*')))
self.desttable = self.dialog.addList(self.dialog, "Destination Table:", self.guiapp.outputwriter.getTables())
#self.operation = self.dialog.addList(self.dialog, "Operation:", ("Insert","Update","Insert/Update"))
#self.error = self.dialog.addList(self.dialog, "On error:", ("Ask","Skip","Abort"))
self.logfile = self.dialog.addFileChooser(self.dialog,
"Log File:",
"",
(('Logfiles', '*.log'),('All files', '*')))
btnframe = self.dialog.addFrame(self.dialog)
self.dialog.addButton(btnframe, "Next", self.doNext)
self.dialog.addButton(btnframe, "Cancel", self.doCancel)
self.dialog.show()
def doCancel(self):
""" Called if the Cancel-button was pressed. """
self.dialog.close()
self.dialog = None
#self.guiapp.InitialDialog
def doNext(self):
""" Start to import the XML-file into the KexiDB table. """
self.guiapp.inputreader.xmlfile = str(self.importfile.get())
self.guiapp.outputwriter.setTable( str(self.desttable.get()) )
self.guiapp.outputwriter.setLogFile( str(self.logfile.get()) )
try:
self.guiapp.inputreader.read( self.guiapp.outputwriter )
msgbox = self.dialog.showMessageBox("info","Import done",
"Successfully imported records: %s\nFailed to import records: %s" % (self.guiapp.outputwriter.result.successcount, self.guiapp.outputwriter.result.failedcount) )
msgbox.show()
self.doCancel()
except RuntimeError as e:
pass
#except Exception, e:
# import traceback
# traceback.print_exc()
# msgbox = self.dialog.showMessageBox("error", "Error", e)
# msgbox.show()
class MapperDialog:
""" The dialog that provides us a way to map
XHTML columns to the destination table. """
def __init__(self, outputwriter, record):
self.outputwriter = outputwriter
self.ok = False
fieldlist = outputwriter.fieldlist
import gui
self.dlg = gui.Dialog("Import XHTML")
self.dlg.addLabel(self.dlg, "Define how the destination table should be mapped to the data from the XHTML file.")
values = ["",]
for i in range(len(record.fields)):
try:
values.append( "%s: %s" % (i,str(outputwriter.headerrecord.fields[i])) )
except:
values.append( "%s: (%s)" % (i,str(record.fields[i])) )
self.items = []
i = 0
for field in fieldlist.fields():
f = self.dlg.addFrame(self.dlg)
l = self.dlg.addList(f, "%s:" % field.name(), values)
self.items.append( (field,l) )
details = "%s:" % str( field.type() )
if field.isAutoInc(): details += "autoinc,"
if field.isUniqueKey(): details += "unique,"
if field.isNotNull(): details += "notnull,"
if field.isNotEmpty(): details += "notempty,"
self.dlg.addLabel(f, "(%s)" % details[:-1])
try:
variable = str( record.fields[i] )
try:
int(variable)
i += 1
if not field.isAutoInc():
l.set(i)
except ValueError as e:
if not field.type() in ("Integer","BigInteger","ShortInteger","Float","Double"):
i += 1
l.set(i)
except:
pass
btnframe = self.dlg.addFrame(self.dlg)
self.dlg.addButton(btnframe, "Next", self.doNext)
self.dlg.addButton(btnframe, "Cancel", self.dlg.close)
self.dlg.show()
def doNext(self):
mapping = {}
for item in self.items:
(field,l) = item
fieldname = field.name()
colnr = str( l.get() ).split(":",1)[0]
if colnr.isdigit():
print("Table field '%s' is mapped to XML column '%s'" % (fieldname,colnr))
mapping[ fieldname ] = colnr
self.outputwriter.setMapping(mapping)
self.ok = True
self.dlg.close()
def __init__(self, inputreader, outputwriter):
""" Constructor. """
self.inputreader = inputreader
self.outputwriter = outputwriter
self.outputwriter.onWrite = self.onWrite
self.InitialDialog(self)
def onWrite(self, record):
""" This method got called after the first record got
readed and before we start to import. """
return self.MapperDialog(self.outputwriter, record).ok
GuiApp( SaxInput(), KexiDBOutput() )
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