Return to importFMPXML.py CVS log

Up to [Repository] / ZSQLExtend

added importFMPXML.py external program to import FMPXML in Postgres

#!/usr/local/bin/python
#

import string
from xml.dom.pulldom import parse
import psycopg2 as psycopg
import logging
import sys


def getTextFromNode(nodename):
    """get the cdata content of a node"""
    if nodename is None:
        return ""
    nodelist=nodename.childNodes
    rc = ""
    for node in nodelist:
        if node.nodeType == node.TEXT_NODE:
           rc = rc + node.data
    return rc

def sql_quote(v):
    # quote dictionary
    quote_dict = {"\'": "''", "\\": "\\\\"}
    for dkey in quote_dict.keys():
        if string.find(v, dkey) >= 0:
            v=string.join(string.split(v,dkey),quote_dict[dkey])
    return "'%s'" % v

def SimpleSearch(curs,query, args=None):
    """execute sql query and return data"""
    logging.debug("executing: "+query)
    curs.execute(query, args)
    logging.debug("sql done")
    return curs.fetchall()


def importXMLFileFMP(dsn,table,filename,update_fields=None,id_field=None,sync_mode=False):
    '''
    Import FileMaker XML file (FMPXMLRESULT format) into the table.
    @param table: name of the table the xml shall be imported into
    @param filename: xmlfile filename
    @param update_fields: (optional) list of fields to update; default is to create all fields
    @param id_field: (optional) field which uniquely identifies an entry for updating purposes.
    @param sync_mode: (optional) really synchronise, i.e. delete entries not in XML file
    '''

    # connect database
    dbCon = psycopg.connect(dsn)
    db = dbCon.cursor()
    assert db, "AIIEE no db cursor for %s!!"%dsn

    # read XML file
    fh=file(filename)
    logging.info("reading file "+filename)
    doc=parse(fh)
    logging.info("file read")

    dbIDs = {}
    rowcnt = 0
    ret = ""
    
    logging.debug("dsn: "+dsn)
    logging.debug("table: "+table)
    logging.debug("update_fields: "+repr(update_fields))
    logging.debug("id_field: "+id_field)
    logging.debug("sync_mode: "+repr(sync_mode))
    
    if id_field is not None:
        # prepare a list of ids for sync mode
        qstr="select %s from %s"%(id_field,table)
        for id in SimpleSearch(db, qstr):
            # value 0: not updated
            dbIDs[id[0]] = 0;
            rowcnt += 1
            
        logging.info("%d entries in DB to sync"%rowcnt)
    
    fieldNames = []
    rowcnt = 0
    id_val = ''
    
    while 1:
        node=doc.getEvent()
    
        if node is None:
            break;
        
        # METADATA tag defines number and names of fields in FMPXMLRESULT
        if node[1].nodeName == 'METADATA':
            doc.expandNode(node[1])
        
            names=node[1].getElementsByTagName('FIELD')

            for name in names:
                fn = name.getAttribute('NAME')
                fieldNames.append(fn)
            
            if update_fields is None:
                # update all fields
                update_fields = fieldNames
            
            logging.debug("fieldnames:"+repr(fieldNames))
            # get list of fields in db table
            qstr="""select attname from pg_attribute, pg_class where attrelid = pg_class.oid and relname = '%s'"""
            columns=[x[0] for x in SimpleSearch(db, qstr%table)]
            
            # adjust db table to fields in XML and fieldlist
            for fieldName in fieldNames:
                logging.debug("db-fieldname:"+repr(fieldName))                     
                if (fieldName not in columns) and (fieldName in update_fields):
                    qstr="alter table %s add %%s %%s"%table
                    logging.info("db add field:"+qstr%(fieldName,'text'))
                    db.execute(qstr, (fieldName,'text'))
                    db.commit()
                    
        
        # ROW tags (in RESULTSET tag) hold data
        elif node[1].nodeName == 'ROW':
            rowcnt += 1
            
            doc.expandNode(node[1])
            cols=node[1].getElementsByTagName('COL')
            dataSet={}
            i = 0
            # populate with data
            for col in cols:
                data=col.getElementsByTagName('DATA')
                dataSet[fieldNames[i]] = getTextFromNode(data[0])
                i += 1
                
            update=False
            
            # synchronize by id_field
            if id_field:
                id_val=dataSet[id_field]
                if id_val in dbIDs:
                    dbIDs[id_val] += 1
                    update=True
            
            if update:
                # update existing row (by id_field)
                setvals=[]
                for fieldName in update_fields:
                    setvals.append("%s = %s"%(fieldName,sql_quote(dataSet[fieldName])))
                setStr=string.join(setvals, ',')
                id_val=dataSet[id_field]
                qstr="UPDATE %s SET %s WHERE %s = '%s' "%(table,setStr,id_field,id_val)
                db.execute(qstr)
                ret += "up: %s"%id_val
            else:
                # create new row
                fields=string.join(update_fields, ',')
                values=string.join([" %s "%sql_quote(dataSet[x]) for x in update_fields], ',')
                qstr="INSERT INTO %s (%s) VALUES (%s)"%(table,fields,values)
                db.execute(qstr)
                ret += "ad: %s"%dataSet.get(id_field, rowcnt)

            #logging.info(" row:"+"%d (%s)"%(rowcnt,id_val))
            if (rowcnt % 10) == 0:
                logging.info(" row:"+"%d (%s)"%(rowcnt,id_val))
                dbCon.commit()

    dbCon.commit()
    if sync_mode:
        # delete unmatched entries in db
        for id in dbIDs.keys():
            # find all not-updated fields
            if dbIDs[id] == 0:
                logging.info(" delete:"+id)
                qstr = "DELETE FROM %s WHERE %%s = '%%s'"%table
                db.execute(qstr, (id_field,id))
                
            elif dbIDs[id] > 1:
                logging.info(" sync:"+"id used more than once?"+id)
        
        dbCon.commit()
    
    return ret

##
## public static int main()
##

from optparse import OptionParser

opars = OptionParser()
opars.add_option("-f", "--file", 
                 dest="filename",
                 help="FMPXML file name", metavar="FILE")
opars.add_option("-c", "--dsn", 
                 dest="dsn", 
                 help="database connection string")
opars.add_option("-t", "--table", 
                 dest="table", 
                 help="database table name")
opars.add_option("--fields", default=None, 
                 dest="update_fields", 
                 help="list of fields to update (comma separated)", metavar="LIST")
opars.add_option("--id-field", default=None, 
                 dest="id_field", 
                 help="name of id field for synchronisation", metavar="NAME")
opars.add_option("--sync-mode", default=False, action="store_true", 
                 dest="sync_mode", 
                 help="do full sync (remove unmatched fields from db)")
opars.add_option("-d", "--debug", default=False, action="store_true", 
                 dest="debug", 
                 help="debug mode (more output)")

(options, args) = opars.parse_args()

if len(sys.argv) < 2 or options.filename is None or options.dsn is None:
    opars.print_help()
    sys.exit(1)

if options.debug:
    loglevel = logging.DEBUG
else:
    loglevel = logging.INFO

logging.basicConfig(level=loglevel, 
                    format='%(asctime)s %(levelname)s %(message)s',
                    datefmt='%H:%M:%S')

update_fields = None

if options.update_fields:
    update_fields = [string.strip(s) for s in options.update_fields.split(',')]
     
importXMLFileFMP(dsn=options.dsn,table=options.table,filename=options.filename,
                 update_fields=update_fields,id_field=options.id_field,
                 sync_mode=options.sync_mode)

print "DONE!"