import struct

import json
import sys

class RDQ(object):
    def __init__(self, f):
        self.f = f
        self.read = f.read

    def read_str_short(self):
        l = struct.unpack('>H', self.f.read(2))[0]
        return self.read(l)

    def read_str(self):
        l = struct.unpack('>I', self.f.read(4))[0]
        return self.read(l)


def main(name):
    with open(name) as f:
        rdq = RDQ(f)
        # read some header junk
        rdq.read(36)

        while True:
            pos = f.tell()
            'basic_message'
            item_type = rdq.read_str_short()
            if len(item_type) == 0:
                break

            'resource'
            rdq.read(3)
            rdq.read_str_short()

            'exchange'
            rdq.read(7)
            rdq.read_str_short()

            exchange = rdq.read(3)
            rdq.read_str_short()

            rdq.read(3)
            queue = rdq.read_str_short()

            'content'
            rdq.read(3)
            rdq.read_str_short()

            'none'
            rdq.read(3)
            rdq.read_str_short()

            rdq.read(6)
            content_type = rdq.read_str_short()

            rdq.read(7)
            content = rdq.read_str()

            rdq.read(66)

            print json.dumps({'pos': pos, 'queue': queue, 'content_type': content_type, 'content': content})


if __name__ == '__main__':
    main(sys.argv[1])