Annotation of ZSQLExtend/importFMPXML-tenorsax.py, revision 1.1
1.1 ! casties 1: #!/usr/local/bin/python
! 2: #
! 3:
! 4: import string
! 5: import logging
! 6: import sys
! 7:
! 8: from xml import sax
! 9: from amara import saxtools
! 10:
! 11: try:
! 12: import psycopg2 as psycopg
! 13: psyco = 2
! 14: except:
! 15: import psycopg
! 16: psyco = 1
! 17:
! 18: fm_ns = 'http://www.filemaker.com/fmpxmlresult'
! 19:
! 20: def getTextFromNode(nodename):
! 21: """get the cdata content of a node"""
! 22: if nodename is None:
! 23: return ""
! 24: nodelist=nodename.childNodes
! 25: rc = ""
! 26: for node in nodelist:
! 27: if node.nodeType == node.TEXT_NODE:
! 28: rc = rc + node.data
! 29: return rc
! 30:
! 31: def sql_quote(v):
! 32: # quote dictionary
! 33: quote_dict = {"\'": "''", "\\": "\\\\"}
! 34: for dkey in quote_dict.keys():
! 35: if string.find(v, dkey) >= 0:
! 36: v=string.join(string.split(v,dkey),quote_dict[dkey])
! 37: return "'%s'"%v
! 38:
! 39: def SimpleSearch(curs,query, args=None):
! 40: """execute sql query and return data"""
! 41: logging.debug("executing: "+query)
! 42: if psyco == 1:
! 43: query = query.encode("UTF-8")
! 44: curs.execute(query, args)
! 45: logging.debug("sql done")
! 46: try:
! 47: return curs.fetchall()
! 48: except:
! 49: return None
! 50:
! 51:
! 52:
! 53: class xml_handler:
! 54:
! 55: def __init__(self,dsn,table,update_fields=None,id_field=None,sync_mode=False):
! 56: '''
! 57: SAX handler to import FileMaker XML file (FMPXMLRESULT format) into the table.
! 58: @param dsn: database connection string
! 59: @param table: name of the table the xml shall be imported into
! 60: @param filename: xmlfile filename
! 61: @param update_fields: (optional) list of fields to update; default is to create all fields
! 62: @param id_field: (optional) field which uniquely identifies an entry for updating purposes.
! 63: @param sync_mode: (optional) really synchronise, i.e. delete entries not in XML file
! 64: '''
! 65: # set up parser
! 66: self.event = None
! 67: self.top_dispatcher = {
! 68: (saxtools.START_ELEMENT, fm_ns, u'METADATA'):
! 69: self.handle_meta_fields,
! 70: (saxtools.START_ELEMENT, fm_ns, u'RESULTSET'):
! 71: self.handle_data,
! 72: }
! 73:
! 74: # connect database
! 75: self.dbCon = psycopg.connect(dsn)
! 76: self.db = self.dbCon.cursor()
! 77: assert self.db, "AIIEE no db cursor for %s!!"%dsn
! 78:
! 79: logging.debug("dsn: "+repr(dsn))
! 80: logging.debug("table: "+repr(table))
! 81: logging.debug("update_fields: "+repr(update_fields))
! 82: logging.debug("id_field: "+repr(id_field))
! 83: logging.debug("sync_mode: "+repr(sync_mode))
! 84:
! 85: self.table = table
! 86: self.update_fields = update_fields
! 87: self.id_field = id_field
! 88: self.sync_mode = sync_mode
! 89:
! 90: self.dbIDs = {}
! 91: self.rowcnt = 0
! 92:
! 93: if id_field is not None:
! 94: # prepare a list of ids for sync mode
! 95: qstr="select %s from %s"%(id_field,table)
! 96: for id in SimpleSearch(self.db, qstr):
! 97: # value 0: not updated
! 98: self.dbIDs[id[0]] = 0;
! 99: self.rowcnt += 1
! 100:
! 101: logging.info("%d entries in DB to sync"%self.rowcnt)
! 102:
! 103: self.fieldNames = []
! 104:
! 105: return
! 106:
! 107: def handle_meta_fields(self, end_condition):
! 108: dispatcher = {
! 109: (saxtools.START_ELEMENT, fm_ns, u'FIELD'):
! 110: self.handle_meta_field,
! 111: }
! 112: #First round through the generator corresponds to the
! 113: #start element event
! 114: logging.debug("START METADATA")
! 115: yield None
! 116:
! 117: #delegate is a generator that handles all the events "within"
! 118: #this element
! 119: delegate = None
! 120: while not self.event == end_condition:
! 121: delegate = saxtools.tenorsax.event_loop_body(
! 122: dispatcher, delegate, self.event)
! 123: yield None
! 124:
! 125: #Element closed. Wrap up
! 126: logging.debug("END METADATA")
! 127: if self.update_fields is None:
! 128: # update all fields
! 129: self.update_fields = self.fieldNames
! 130:
! 131: logging.debug("xml-fieldnames:"+repr(self.fieldNames))
! 132: # get list of fields in db table
! 133: qstr="""select attname from pg_attribute, pg_class where attrelid = pg_class.oid and relname = '%s'"""
! 134: columns=[x[0] for x in SimpleSearch(self.db, qstr%self.table)]
! 135:
! 136: # adjust db table to fields in XML and fieldlist
! 137: for fieldName in self.fieldNames:
! 138: logging.debug("db-fieldname:"+repr(fieldName))
! 139: if (fieldName not in columns) and (fieldName in self.update_fields):
! 140: qstr="alter table %s add %s %s"%(self.table,fieldName,'text')
! 141: logging.info("db add field:"+qstr)
! 142: self.db.execute(qstr)
! 143: self.dbCon.commit()
! 144:
! 145: # prepare sql statements for update
! 146: setStr=string.join(["%s = %%s"%f for f in self.update_fields], ', ')
! 147: self.updQuery="UPDATE %s SET %s WHERE %s = %%s"%(self.table,setStr,self.id_field)
! 148: # and insert
! 149: fields=string.join(self.update_fields, ',')
! 150: values=string.join(['%s' for f in self.update_fields], ',')
! 151: self.addQuery="INSERT INTO %s (%s) VALUES (%s)"%(self.table,fields,values)
! 152: #print "upQ: ", self.updQuery
! 153: #print "adQ: ", self.addQuery
! 154:
! 155: return
! 156:
! 157: def handle_meta_field(self, end_condition):
! 158: name = self.params.get((None, u'NAME'))
! 159: yield None
! 160: #Element closed. Wrap up
! 161: self.fieldNames.append(name)
! 162: logging.debug("FIELD name: "+name)
! 163: return
! 164:
! 165: def handle_data(self, end_condition):
! 166: dispatcher = {
! 167: (saxtools.START_ELEMENT, fm_ns, u'ROW'):
! 168: self.handle_row,
! 169: }
! 170: #First round through the generator corresponds to the
! 171: #start element event
! 172: logging.debug("START RESULTSET")
! 173: self.rowcnt = 0
! 174: yield None
! 175:
! 176: #delegate is a generator that handles all the events "within"
! 177: #this element
! 178: delegate = None
! 179: while not self.event == end_condition:
! 180: delegate = saxtools.tenorsax.event_loop_body(
! 181: dispatcher, delegate, self.event)
! 182: yield None
! 183:
! 184: #Element closed. Wrap up
! 185: logging.debug("END RESULTSET")
! 186: self.dbCon.commit()
! 187:
! 188: if self.sync_mode:
! 189: # delete unmatched entries in db
! 190: for id in self.dbIDs.keys():
! 191: # find all not-updated fields
! 192: if self.dbIDs[id] == 0:
! 193: logging.info(" delete:"+id)
! 194: qstr = "DELETE FROM %s WHERE %%s = '%%s'"%self.table
! 195: SimpleSearch(self.db, qstr, (self.id_field,id))
! 196:
! 197: elif self.dbIDs[id] > 1:
! 198: logging.info(" sync:"+"id used more than once?"+id)
! 199:
! 200: self.dbCon.commit()
! 201:
! 202: return
! 203:
! 204: def handle_row(self, end_condition):
! 205: dispatcher = {
! 206: (saxtools.START_ELEMENT, fm_ns, u'COL'):
! 207: self.handle_col,
! 208: }
! 209: logging.debug("START ROW")
! 210: self.dataSet = {}
! 211: self.colIdx = 0
! 212: yield None
! 213:
! 214: #delegate is a generator that handles all the events "within"
! 215: #this element
! 216: delegate = None
! 217: while not self.event == end_condition:
! 218: delegate = saxtools.tenorsax.event_loop_body(
! 219: dispatcher, delegate, self.event)
! 220: yield None
! 221:
! 222: #Element closed. Wrap up
! 223: logging.debug("END ROW")
! 224: self.rowcnt += 1
! 225: # process collected row data
! 226: update=False
! 227: id_val=''
! 228: # synchronize by id_field
! 229: if self.id_field:
! 230: id_val=self.dataSet[self.id_field]
! 231: if id_val in self.dbIDs:
! 232: self.dbIDs[id_val] += 1
! 233: update=True
! 234:
! 235: if update:
! 236: # update existing row (by id_field)
! 237: #setvals=[]
! 238: #for fieldName in self.update_fields:
! 239: # setvals.append("%s = %s"%(fieldName,sql_quote(self.dataSet[fieldName])))
! 240: #setStr=string.join(setvals, ',')
! 241: id_val=self.dataSet[self.id_field]
! 242: #qstr="UPDATE %s SET %s WHERE %s = '%s' "%(self.table,setStr,self.id_field,id_val)
! 243: args = [self.dataSet[f] for f in self.update_fields]
! 244: args.append(id_val)
! 245: SimpleSearch(self.db, self.updQuery, args)
! 246: logging.debug("update: %s"%id_val)
! 247: else:
! 248: # create new row
! 249: #fields=string.join(update_fields, ',')
! 250: #values=string.join([" %s "%sql_quote(self.dataSet[x]) for x in self.update_fields], ',')
! 251: #qstr="INSERT INTO %s (%s) VALUES (%s)"%(self.table,fields,self.values)
! 252: args = [self.dataSet[f] for f in self.update_fields]
! 253: SimpleSearch(self.db, self.addQuery, args)
! 254: logging.debug("add: %s"%self.dataSet.get(self.id_field, rowcnt))
! 255:
! 256: #logging.info(" row:"+"%d (%s)"%(self.rowcnt,id_val))
! 257: if (self.rowcnt % 10) == 0:
! 258: logging.info(" row:"+"%d (%s)"%(self.rowcnt,id_val))
! 259: self.dbCon.commit()
! 260:
! 261: return
! 262:
! 263: def handle_col(self, end_condition):
! 264: dispatcher = {
! 265: (saxtools.START_ELEMENT, fm_ns, u'DATA'):
! 266: self.handle_data_tag,
! 267: }
! 268: #print "START COL"
! 269: yield None
! 270: #delegate is a generator that handles all the events "within"
! 271: #this element
! 272: delegate = None
! 273: while not self.event == end_condition:
! 274: delegate = saxtools.tenorsax.event_loop_body(
! 275: dispatcher, delegate, self.event)
! 276: yield None
! 277: #Element closed. Wrap up
! 278: #print "END COL"
! 279: self.colIdx += 1
! 280: return
! 281:
! 282: def handle_data_tag(self, end_condition):
! 283: #print "START DATA"
! 284: content = u''
! 285: yield None
! 286: # gather child elements
! 287: while not self.event == end_condition:
! 288: if self.event[0] == saxtools.CHARACTER_DATA:
! 289: content += self.params
! 290: yield None
! 291: #Element closed. Wrap up
! 292: field = self.fieldNames[self.colIdx]
! 293: self.dataSet[field] = content
! 294: #print " DATA(", field, ") ", repr(content)
! 295: return
! 296:
! 297:
! 298:
! 299:
! 300:
! 301: ##
! 302: ## public static int main()
! 303: ##
! 304:
! 305: from optparse import OptionParser
! 306:
! 307: opars = OptionParser()
! 308: opars.add_option("-f", "--file",
! 309: dest="filename",
! 310: help="FMPXML file name", metavar="FILE")
! 311: opars.add_option("-c", "--dsn",
! 312: dest="dsn",
! 313: help="database connection string")
! 314: opars.add_option("-t", "--table",
! 315: dest="table",
! 316: help="database table name")
! 317: opars.add_option("--fields", default=None,
! 318: dest="update_fields",
! 319: help="list of fields to update (comma separated)", metavar="LIST")
! 320: opars.add_option("--id-field", default=None,
! 321: dest="id_field",
! 322: help="name of id field for synchronisation (only appends data otherwise)", metavar="NAME")
! 323: opars.add_option("--sync-mode", default=False, action="store_true",
! 324: dest="sync_mode",
! 325: help="do full sync based on id field (remove unmatched fields from db)")
! 326: opars.add_option("-d", "--debug", default=False, action="store_true",
! 327: dest="debug",
! 328: help="debug mode (more output)")
! 329:
! 330: (options, args) = opars.parse_args()
! 331:
! 332: if len(sys.argv) < 2 or options.filename is None or options.dsn is None:
! 333: opars.print_help()
! 334: sys.exit(1)
! 335:
! 336: if options.debug:
! 337: loglevel = logging.DEBUG
! 338: else:
! 339: loglevel = logging.INFO
! 340:
! 341: logging.basicConfig(level=loglevel,
! 342: format='%(asctime)s %(levelname)s %(message)s',
! 343: datefmt='%H:%M:%S')
! 344:
! 345: update_fields = None
! 346:
! 347: if options.update_fields:
! 348: update_fields = [string.strip(s) for s in options.update_fields.split(',')]
! 349:
! 350: parser = sax.make_parser()
! 351: #The "consumer" is our own handler
! 352: consumer = xml_handler(dsn=options.dsn,table=options.table,
! 353: update_fields=update_fields,id_field=options.id_field,
! 354: sync_mode=options.sync_mode)
! 355: #Initialize Tenorsax with handler
! 356: handler = saxtools.tenorsax(consumer)
! 357: #Resulting tenorsax instance is the SAX handler
! 358: parser.setContentHandler(handler)
! 359: parser.setFeature(sax.handler.feature_namespaces, 1)
! 360: parser.parse(options.filename)
! 361:
! 362:
! 363: print "DONE!"
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