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I have created a test app that can recognize some image using Goggle Goggles. It works for me, but I receive binaryt protobuf response. I have no proto-files, just binary response. How can I get data from it? (Have sent some image with bottle of bear and got the nex response):
A
TuborgLogo9 HoaniText���;�)b���2d8e991bff16229f6"�
+TR=T=AQBd6Cl4Kd8:X=OqSEi:S=_rSozFBgfKt5d9b0
+TR=T=6rLQxKE2xdA:X=OqSEi:S=gd6Aqb28X0ltBU9V
+TR=T=uGPf9zJDWe0:X=OqSEi:S=32zTfdIOdI6kuUTa
+TR=T=RLkVoGVd92I:X=OqSEi:S=P7yOhvSAOQW6SRHN
+TR=T=J1FMvNmcyMk:X=OqSEi:S=5Z631_rd2ijo_iuf�
need to get string "Tuborg" and if possible type - "Logo"
904
A protocol buffer message is a series of key-value pairs. The binary version of a message just uses the field's number as the key -- the name and declared type for each field can only be determined on the decoding end by referencing the message type's definition (that is, the .
Protobuf is a binary message format crafted by Google and is efficient compared to other message formats like JSON & XML.
Protobuf categorizes normally used data types into wire types which provides information to find the length of the value. For wire type 2, length is also encoded along with value. Zero values are not transmitted. 0, False, “”, does not take any bytes.
I'm going to assume the real question is how to decode protobufs and not how to read binary from the wire using Java.
The answer to your question can be found here
Briefly, on the wire, protobufs are encoded as 3-tuples of <key,type,value>, where:
.proto schema<Varint, int32, length-delimited, start-group, end-group,int64. It contains just enough information to decode the value of the 3-tuple, namely it tells you how long the value is.
91
You can decode with protoc:
protoc --decode_raw < msg.bin
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