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  Protobuf compiled and used on the Ubuntu 14.04
     
  Add Date : 2018-11-21      
         
         
         
  Abstract: Protobuf compiled and used on the Ubuntu 14.04

Foreword

It has nothing to do know a language Google open source data exchange protocol: protobuf. Only know that is a different json and XML format, there is a particularly good performance (which is indeed in Java C ++ implementations and!)

Google recently retired and sit looked under the Protobuf related stuff, but baidu out a lot of things are out of date, I had to take the time to shift, so there is the following content.

• download the source code and the preparatory work

$ Sudo apt-get install autoconf automake libtool curl
$ Git clone https://github.com/google/protobuf
$ Cd protobuf
• Modify autogen.sh

Because "you know" reasons, autogen can not curl to download the source code package gmock, so I gmock bag put on his github. Modify autogen.sh, download it on my bag github

peter @ ubuntu14: ~ / protobuf / protobuf $ git diff
diff --git a / autogen.sh b / autogen.sh
index 5b4c29f..f2abf77 100755
--- A / autogen.sh
+++ B / autogen.sh
@@ -31,7 +31,7 @@ Fi
 # Directory is set up as an SVN external.
 ! If test -e gmock; then
  echo "Google Mock not present. Fetching gmock-1.7.0 from the web ..."
- Curl $ curlopts -O https://googlemock.googlecode.com/files/gmock-1.7.0.zip
+ Curl $ curlopts -L -o gmock-1.7.0.zip https://github.com/peter-wangxu/gMock/archive/1.7.0.zip
  unzip -q gmock-1.7.0.zip
  rm gmock-1.7.0.zip
  mv gmock-1.7.0 gmock

# The curl green line that replaced
• generated configure file

$ ./autogen
• Compiling and Installing protobuf

$ ./configure
$ Make
$ Make check
$ Sudo make install
$ Sudo ldconfig # refresh shared library cache.

NOTE: The default is installed in "/ usr / local / lib", and in some platform / usr / local / lib LD_LIBRARY_PATH variable which is not the default, you can change the installation directory with the following command

$ ./configure --prefix = / Usr

When you see something like the following text, completed the basic installation instructions protobuf

================================================== ==========================
Testsuite summary for Protocol Buffers 3.0.0-beta-2
================================================== ==========================
# TOTAL: 6
# PASS: 6
# SKIP: 0
# XFAIL: 0
# FAIL: 0
# XPASS: 0
# ERROR: 0
================================================== ==========================

Then there is the Python language associated with some of the configuration

 
• installation of Python support protobuf

cd python # located at protobuf
sudo python setup.py install

NOTE: If the above command fails, you can try to install under pip related packages can Depends some python packages

sudo apt-get install python-pip

-------------------------------------------------- ------------------------------

The next step is to use the protobuf
• Compile .proto file

$ Touch DataService.proto
# Into the following

message RowProto {
required uint32 null_map = 1;
repeated string column = 2;
}

message TableProto {
repeated string column = 1;
repeated string row = 2;
}


• produce py file for later use Python

protoc --python_out =. ./DataService.proto
• protobuf use

Create TestDataService.py file, add the following content

import sys
import DataService_pb2

#create proto
row = DataService_pb2.RowProto ()
row.null_map = 1
row.column.append ( "wang")
row.column.append ( "female")
row_str = row.SerializeToString ()
print "row_str:", row_str
table = DataService_pb2.TableProto ()
table.column.append ( "name")
table.column.append ( "gender")
table.row.append (row_str)
table_str = table.SerializeToString ()

#process proto
table_proto = DataService_pb2.TableProto ()
table_proto.ParseFromString (table_str)
print "column:"
print table_proto.column

row_str = table_proto.row [0]
row_proto = DataService_pb2.RowProto ()
row_proto.ParseFromString (row_str.encode ( 'utf8'))
print "row1:"
print row_proto.column

Run TestDataServer.py

peter @ ubuntu14: ~ / protobuf / proto_test $ python TestDataService.py
row_str: wangfemale
column:
[U'name ', u'gender']
row1:
[U'wang ', u'female']

Thus the contents of this issue, the main installation and configuration protobuf using involves little behind time will add more content related to the use

-------------------------------------------------- ------------------------------

FAQ:

If you encounter:

protoc: error while loading shared libraries: libprotoc.so.10: can not open shared object file: No such file or directory

solution

sudo ldconfig
     
         
         
         
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