On Thursday, June 11, 2015 at 6:08:33 PM UTC-7, Misha Gavrilov wrote: > > Hi all I have a problem with protocol buffers serialised files. > I use python for parsing buffer files. But I can't read any message from > file, I don't know why. > Writer developed on Java and use CodedInputStream and WriteMassangeNoTag > for writing buffers file. > I wont to parse this file by python. I have all .proto files compiled > successful for python. I read PB documentation and find that PB massages > must be delimited if they are located in one file. > > So the questions are next: > 1. What is the delimiter CodedInputStream use? > 2. Can some one provide code example for python, how to read messages from > file one by one. > You need to delimite the messages yourself. CodedInputStream/CodedOutputStream does not read/write any delimiters. Basically PB only helps you convert a message object into a chunk of data. It's your responsibility to take care of how to put/read this chunk of data within the file.
> > Code Example (Default code from PB Documentation): > JM = proto.myproto_pb2.MyProtoClass() > try: > f = open(sys.argv[1], "rb") > # text_format.Merge(f.read(), JM) > # print(f.read()) > JM.ParseFromString(f.read()) > f.close() > print (JM) > except IOError: > print (sys.argv[1] + ": Could not open file. Creating a new one.") > > Return error: > google.protobuf.message.DecodeError: Tag had invalid wire type. > > P.S. If python program write buffer file then python program can read and > parse it. > So problem happen when java write and python read. > > Thanks > Mike. > > > -- You received this message because you are subscribed to the Google Groups "Protocol Buffers" group. To unsubscribe from this group and stop receiving emails from it, send an email to protobuf+unsubscr...@googlegroups.com. To post to this group, send email to protobuf@googlegroups.com. Visit this group at http://groups.google.com/group/protobuf. For more options, visit https://groups.google.com/d/optout.
