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#!/usr/bin/python
import osmformat_pb2
import fileformat_pb2
import sys
import socket
import zlib
from binarystream import BinaryStream
headerSizeMax = 64 * 1024
bodySizeMax = 32*1024*1024
f = open("berlin.osm.pbf")
stream = BinaryStream(f)
headerSize = socket.ntohl(stream.readUInt32());
if headerSizeMax < headerSize:
raise ValueError("Header to long")
headerbuff = stream.readBytes(headerSize)
blobheader = fileformat_pb2.BlobHeader()
blobheader.ParseFromString(headerbuff)
bodysize = blobheader.datasize
if bodySizeMax < bodysize:
raise ValueError("Body to fat")
blobbuff = stream.readBytes(bodysize)
blob = fileformat_pb2.Blob()
blob.ParseFromString(blobbuff)
if blob.raw != "":
rawstr = blob.raw
else:
rawstr = zlib.decompress(blob.zlib_data)
headerblock = osmformat_pb2.HeaderBlock()
headerblock.ParseFromString(rawstr)
print "Source:",headerblock.source
print "Writingprog:",headerblock.writingprogram
print "required features:",headerblock.required_features
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