CODEWITHSUNDEEP
c++protocol-buffers
user7953556
user7953556

Reputation: 47

protobuffer throw runtime error as Failed to parse address book in latest current version 3.0.0?

I have create a addressbook.proto with this i m good to generate below two files

addressbook.pb.h
addressbook.pb.cc

with protoc -I=$SRC_DIR --cpp_out=$DST_DIR $SRC_DIR/addressbook.proto

i have a code which read my address book name readproto.cc

readproto.cc

int main(int argc, char* argv[]) {
if (argc != 2) {
    cerr << "Usage:  " << argv[0] << " ADDRESS_BOOK_FILE" << endl;
    return -1;
  }


tutorial::AddressBook address_book;

  {
    // Read the existing address book.
    fstream input(argv[1], ios::in | ios::binary);
    if (!input) {
      cout << argv[1] << ": File not found.  Creating a new file." << endl;
    } else if (!address_book.ParseFromIstream(&input)) {
      cerr << "Failed to parse address book." << endl;
      return -1;
    }
  }

----
}

and i compile as

c++ readproto.cc addressbook.pb.cc `pkg-config --cflags --libs protobuf

i get executable file nothing bad but my doubt is what file should i load with this executable?

i tired as 

./a.out addressbook.proto

Not sure which file need to load addressbook.proto is good ??

result : Failed to parse address book

.

i am new with protobuffer need help on it .Struggling from last three days this my last hope plss help with in this thank you

Upvotes: 0

Views: 558

Answers (2)

HughB
HughB

Reputation: 373

Since you are using the protobuf tutorial, Call your program like this:

./a.out my_adress_book.bin

It will create an empty my_adress_book.bin and then prompt you to add entries.

This part creates an empty file:

fstream input(argv[1], ios::in | ios::binary);
if (!input) {
  cout << argv[1] << ": File not found.  Creating a new file." << endl;
} 
....

Upvotes: 3

JazzSoft
JazzSoft

Reputation: 426

You have to specify the actual binary data. The data format is defined in the .proto file. Try to export the data to the file first. And then read it.

Upvotes: 0

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