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add en example which easy start grpc by 4 kinds method of service with python

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kerbalwzy 6 years ago
parent 5d6001dd95
commit d1b64c3a3e
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  1. 373
      examples/python/easy_start_demo/LICENSE
  2. 93
      examples/python/easy_start_demo/PyClient.py
  3. 87
      examples/python/easy_start_demo/PyServer.py
  4. 37
      examples/python/easy_start_demo/README.md
  5. 174
      examples/python/easy_start_demo/customGrpcPackages/demo_pb2.py
  6. 99
      examples/python/easy_start_demo/customGrpcPackages/demo_pb2_grpc.py
  7. 51
      examples/python/easy_start_demo/demo.proto
  8. 3
      examples/python/easy_start_demo/notes

373
examples/python/easy_start_demo/LICENSE
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Mozilla Public License Version 2.0
==================================
1. Definitions
--------------
1.1. "Contributor"
means each individual or legal entity that creates, contributes to
the creation of, or owns Covered Software.
1.2. "Contributor Version"
means the combination of the Contributions of others (if any) used
by a Contributor and that particular Contributor's Contribution.
1.3. "Contribution"
means Covered Software of a particular Contributor.
1.4. "Covered Software"
means Source Code Form to which the initial Contributor has attached
the notice in Exhibit A, the Executable Form of such Source Code
Form, and Modifications of such Source Code Form, in each case
including portions thereof.
1.5. "Incompatible With Secondary Licenses"
means
(a) that the initial Contributor has attached the notice described
in Exhibit B to the Covered Software; or
(b) that the Covered Software was made available under the terms of
version 1.1 or earlier of the License, but not also under the
terms of a Secondary License.
1.6. "Executable Form"
means any form of the work other than Source Code Form.
1.7. "Larger Work"
means a work that combines Covered Software with other material, in
a separate file or files, that is not Covered Software.
1.8. "License"
means this document.
1.9. "Licensable"
means having the right to grant, to the maximum extent possible,
whether at the time of the initial grant or subsequently, any and
all of the rights conveyed by this License.
1.10. "Modifications"
means any of the following:
(a) any file in Source Code Form that results from an addition to,
deletion from, or modification of the contents of Covered
Software; or
(b) any new file in Source Code Form that contains any Covered
Software.
1.11. "Patent Claims" of a Contributor
means any patent claim(s), including without limitation, method,
process, and apparatus claims, in any patent Licensable by such
Contributor that would be infringed, but for the grant of the
License, by the making, using, selling, offering for sale, having
made, import, or transfer of either its Contributions or its
Contributor Version.
1.12. "Secondary License"
means either the GNU General Public License, Version 2.0, the GNU
Lesser General Public License, Version 2.1, the GNU Affero General
Public License, Version 3.0, or any later versions of those
licenses.
1.13. "Source Code Form"
means the form of the work preferred for making modifications.
1.14. "You" (or "Your")
means an individual or a legal entity exercising rights under this
License. For legal entities, "You" includes any entity that
controls, is controlled by, or is under common control with You. For
purposes of this definition, "control" means (a) the power, direct
or indirect, to cause the direction or management of such entity,
whether by contract or otherwise, or (b) ownership of more than
fifty percent (50%) of the outstanding shares or beneficial
ownership of such entity.
2. License Grants and Conditions
--------------------------------
2.1. Grants
Each Contributor hereby grants You a world-wide, royalty-free,
non-exclusive license:
(a) under intellectual property rights (other than patent or trademark)
Licensable by such Contributor to use, reproduce, make available,
modify, display, perform, distribute, and otherwise exploit its
Contributions, either on an unmodified basis, with Modifications, or
as part of a Larger Work; and
(b) under Patent Claims of such Contributor to make, use, sell, offer
for sale, have made, import, and otherwise transfer either its
Contributions or its Contributor Version.
2.2. Effective Date
The licenses granted in Section 2.1 with respect to any Contribution
become effective for each Contribution on the date the Contributor first
distributes such Contribution.
2.3. Limitations on Grant Scope
The licenses granted in this Section 2 are the only rights granted under
this License. No additional rights or licenses will be implied from the
distribution or licensing of Covered Software under this License.
Notwithstanding Section 2.1(b) above, no patent license is granted by a
Contributor:
(a) for any code that a Contributor has removed from Covered Software;
or
(b) for infringements caused by: (i) Your and any other third party's
modifications of Covered Software, or (ii) the combination of its
Contributions with other software (except as part of its Contributor
Version); or
(c) under Patent Claims infringed by Covered Software in the absence of
its Contributions.
This License does not grant any rights in the trademarks, service marks,
or logos of any Contributor (except as may be necessary to comply with
the notice requirements in Section 3.4).
2.4. Subsequent Licenses
No Contributor makes additional grants as a result of Your choice to
distribute the Covered Software under a subsequent version of this
License (see Section 10.2) or under the terms of a Secondary License (if
permitted under the terms of Section 3.3).
2.5. Representation
Each Contributor represents that the Contributor believes its
Contributions are its original creation(s) or it has sufficient rights
to grant the rights to its Contributions conveyed by this License.
2.6. Fair Use
This License is not intended to limit any rights You have under
applicable copyright doctrines of fair use, fair dealing, or other
equivalents.
2.7. Conditions
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
in Section 2.1.
3. Responsibilities
-------------------
3.1. Distribution of Source Form
All distribution of Covered Software in Source Code Form, including any
Modifications that You create or to which You contribute, must be under
the terms of this License. You must inform recipients that the Source
Code Form of the Covered Software is governed by the terms of this
License, and how they can obtain a copy of this License. You may not
attempt to alter or restrict the recipients' rights in the Source Code
Form.
3.2. Distribution of Executable Form
If You distribute Covered Software in Executable Form then:
(a) such Covered Software must also be made available in Source Code
Form, as described in Section 3.1, and You must inform recipients of
the Executable Form how they can obtain a copy of such Source Code
Form by reasonable means in a timely manner, at a charge no more
than the cost of distribution to the recipient; and
(b) You may distribute such Executable Form under the terms of this
License, or sublicense it under different terms, provided that the
license for the Executable Form does not attempt to limit or alter
the recipients' rights in the Source Code Form under this License.
3.3. Distribution of a Larger Work
You may create and distribute a Larger Work under terms of Your choice,
provided that You also comply with the requirements of this License for
the Covered Software. If the Larger Work is a combination of Covered
Software with a work governed by one or more Secondary Licenses, and the
Covered Software is not Incompatible With Secondary Licenses, this
License permits You to additionally distribute such Covered Software
under the terms of such Secondary License(s), so that the recipient of
the Larger Work may, at their option, further distribute the Covered
Software under the terms of either this License or such Secondary
License(s).
3.4. Notices
You may not remove or alter the substance of any license notices
(including copyright notices, patent notices, disclaimers of warranty,
or limitations of liability) contained within the Source Code Form of
the Covered Software, except that You may alter any license notices to
the extent required to remedy known factual inaccuracies.
3.5. Application of Additional Terms
You may choose to offer, and to charge a fee for, warranty, support,
indemnity or liability obligations to one or more recipients of Covered
Software. However, You may do so only on Your own behalf, and not on
behalf of any Contributor. You must make it absolutely clear that any
such warranty, support, indemnity, or liability obligation is offered by
You alone, and You hereby agree to indemnify every Contributor for any
liability incurred by such Contributor as a result of warranty, support,
indemnity or liability terms You offer. You may include additional
disclaimers of warranty and limitations of liability specific to any
jurisdiction.
4. Inability to Comply Due to Statute or Regulation
---------------------------------------------------
If it is impossible for You to comply with any of the terms of this
License with respect to some or all of the Covered Software due to
statute, judicial order, or regulation then You must: (a) comply with
the terms of this License to the maximum extent possible; and (b)
describe the limitations and the code they affect. Such description must
be placed in a text file included with all distributions of the Covered
Software under this License. Except to the extent prohibited by statute
or regulation, such description must be sufficiently detailed for a
recipient of ordinary skill to be able to understand it.
5. Termination
--------------
5.1. The rights granted under this License will terminate automatically
if You fail to comply with any of its terms. However, if You become
compliant, then the rights granted under this License from a particular
Contributor are reinstated (a) provisionally, unless and until such
Contributor explicitly and finally terminates Your grants, and (b) on an
ongoing basis, if such Contributor fails to notify You of the
non-compliance by some reasonable means prior to 60 days after You have
come back into compliance. Moreover, Your grants from a particular
Contributor are reinstated on an ongoing basis if such Contributor
notifies You of the non-compliance by some reasonable means, this is the
first time You have received notice of non-compliance with this License
from such Contributor, and You become compliant prior to 30 days after
Your receipt of the notice.
5.2. If You initiate litigation against any entity by asserting a patent
infringement claim (excluding declaratory judgment actions,
counter-claims, and cross-claims) alleging that a Contributor Version
directly or indirectly infringes any patent, then the rights granted to
You by any and all Contributors for the Covered Software under Section
2.1 of this License shall terminate.
5.3. In the event of termination under Sections 5.1 or 5.2 above, all
end user license agreements (excluding distributors and resellers) which
have been validly granted by You or Your distributors under this License
prior to termination shall survive termination.
************************************************************************
* *
* 6. Disclaimer of Warranty *
* ------------------------- *
* *
* Covered Software is provided under this License on an "as is" *
* basis, without warranty of any kind, either expressed, implied, or *
* statutory, including, without limitation, warranties that the *
* Covered Software is free of defects, merchantable, fit for a *
* particular purpose or non-infringing. The entire risk as to the *
* quality and performance of the Covered Software is with You. *
* Should any Covered Software prove defective in any respect, You *
* (not any Contributor) assume the cost of any necessary servicing, *
* repair, or correction. This disclaimer of warranty constitutes an *
* essential part of this License. No use of any Covered Software is *
* authorized under this License except under this disclaimer. *
* *
************************************************************************
************************************************************************
* *
* 7. Limitation of Liability *
* -------------------------- *
* *
* Under no circumstances and under no legal theory, whether tort *
* (including negligence), contract, or otherwise, shall any *
* Contributor, or anyone who distributes Covered Software as *
* permitted above, be liable to You for any direct, indirect, *
* special, incidental, or consequential damages of any character *
* including, without limitation, damages for lost profits, loss of *
* goodwill, work stoppage, computer failure or malfunction, or any *
* and all other commercial damages or losses, even if such party *
* shall have been informed of the possibility of such damages. This *
* limitation of liability shall not apply to liability for death or *
* personal injury resulting from such party's negligence to the *
* extent applicable law prohibits such limitation. Some *
* jurisdictions do not allow the exclusion or limitation of *
* incidental or consequential damages, so this exclusion and *
* limitation may not apply to You. *
* *
************************************************************************
8. Litigation
-------------
Any litigation relating to this License may be brought only in the
courts of a jurisdiction where the defendant maintains its principal
place of business and such litigation shall be governed by laws of that
jurisdiction, without reference to its conflict-of-law provisions.
Nothing in this Section shall prevent a party's ability to bring
cross-claims or counter-claims.
9. Miscellaneous
----------------
This License represents the complete agreement concerning the subject
matter hereof. If any provision of this License is held to be
unenforceable, such provision shall be reformed only to the extent
necessary to make it enforceable. Any law or regulation which provides
that the language of a contract shall be construed against the drafter
shall not be used to construe this License against a Contributor.
10. Versions of the License
---------------------------
10.1. New Versions
Mozilla Foundation is the license steward. Except as provided in Section
10.3, no one other than the license steward has the right to modify or
publish new versions of this License. Each version will be given a
distinguishing version number.
10.2. Effect of New Versions
You may distribute the Covered Software under the terms of the version
of the License under which You originally received the Covered Software,
or under the terms of any subsequent version published by the license
steward.
10.3. Modified Versions
If you create software not governed by this License, and you want to
create a new license for such software, you may create and use a
modified version of this License if you rename the license and remove
any references to the name of the license steward (except to note that
such modified license differs from this License).
10.4. Distributing Source Code Form that is Incompatible With Secondary
Licenses
If You choose to distribute Source Code Form that is Incompatible With
Secondary Licenses under the terms of this version of the License, the
notice described in Exhibit B of this License must be attached.
Exhibit A - Source Code Form License Notice
-------------------------------------------
This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this
file, You can obtain one at http://mozilla.org/MPL/2.0/.
If it is not possible or desirable to put the notice in a particular
file, then You may include the notice in a location (such as a LICENSE
file in a relevant directory) where a recipient would be likely to look
for such a notice.
You may add additional accurate notices of copyright ownership.
Exhibit B - "Incompatible With Secondary Licenses" Notice
---------------------------------------------------------
This Source Code Form is "Incompatible With Secondary Licenses", as
defined by the Mozilla Public License, v. 2.0.

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examples/python/easy_start_demo/PyClient.py
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"""
Author: Zhongying Wang
Email: kerbalwzy@gmail.com
License: MPL2
DateTime: 2019-08-13T23:30:00Z
PythonVersion: Python3.6.3
"""
import grpc
import time
from customGrpcPackages import demo_pb2, demo_pb2_grpc
# Constants
PyGrpcServerAddress = "127.0.0.1:23334"
ClientId = 1
# 简单模式
# Unary
def simple_method(stub):
print("--------------Call SimpleMethod Begin--------------")
req = demo_pb2.Request(Cid=ClientId, ReqMsg="called by Python client")
resp = stub.SimpleMethod(req)
print(f"resp from server({resp.Sid}), the message={resp.RespMsg}")
print("--------------Call SimpleMethod Over---------------")
# 客户端流模式（在一次调用中, 客户端可以多次向服务器传输数据, 但是服务器只能返回一次响应）
# Client Streaming (In a single call, the client can transfer data to the server several times,
# but the server can only return a response once.)
def c_stream_method(stub):
print("--------------Call CStreamMethod Begin--------------")
# 创建一个生成器
# create a generator
def req_msgs():
for i in range(5):
req = demo_pb2.Request(Cid=ClientId, ReqMsg=f"called by Python client, message: {i}")
yield req
resp = stub.CStreamMethod(req_msgs())
print(f"resp from server({resp.Sid}), the message={resp.RespMsg}")
print("--------------Call CStreamMethod Over---------------")
# 服务端流模式（在一次调用中, 客户端只能一次向服务器传输数据, 但是服务器可以多次返回响应）
# Server Streaming (In a single call, the client can only transmit data to the server at one time,
# but the server can return the response many times.)
def s_stream_method(stub):
print("--------------Call SStreamMethod Begin--------------")
req = demo_pb2.Request(Cid=ClientId, ReqMsg="called by Python client")
resp_s = stub.SStreamMethod(req)
for resp in resp_s:
print(f"recv from server({resp.Sid}, message={resp.RespMsg})")
print("--------------Call SStreamMethod Over---------------")
# 双向流模式 (在一次调用中, 客户端和服务器都可以向对方多次收发数据)
# Bidirectional Streaming (In a single call, both client and server can send and receive data
# to each other multiple times.)
def twf_method(stub):
print("--------------Call TWFMethod Begin---------------")
# 创建一个生成器
# create a generator
def req_msgs():
for i in range(5):
req = demo_pb2.Request(Cid=ClientId, ReqMsg=f"called by Python client, message: {i}")
yield req
time.sleep(1)
resp_s = stub.TWFMethod(req_msgs())
for resp in resp_s:
print(f"recv from server({resp.Sid}, message={resp.RespMsg})")
print("--------------Call TWFMethod Over---------------")
def main():
with grpc.insecure_channel(PyGrpcServerAddress) as channel:
stub = demo_pb2_grpc.GRPCDemoStub(channel)
simple_method(stub)
c_stream_method(stub)
s_stream_method(stub)
twf_method(stub)
if __name__ == '__main__':
main()

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examples/python/easy_start_demo/PyServer.py
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"""
Author: Zhongying Wang
Email: kerbalwzy@gmail.com
License: MPL2
DateTime: 2019-08-13T23:30:00Z
PythonVersion: Python3.6.3
"""
import time
import grpc
from threading import Thread
from concurrent import futures
from customGrpcPackages import demo_pb2, demo_pb2_grpc
# Constants
ServerAddress = '127.0.0.1:23334'
ServerId = 1
class DemoServer(demo_pb2_grpc.GRPCDemoServicer):
# 简单模式
# Unary
def SimpleMethod(self, request, context):
print(f"SimpleMethod called by client({request.Cid}) the message: {request.ReqMsg}")
resp = demo_pb2.Response(Sid=ServerId, RespMsg="Python server SimpleMethod Ok!!!!")
return resp
# 客户端流模式（在一次调用中, 客户端可以多次向服务器传输数据, 但是服务器只能返回一次响应）
# Client Streaming (In a single call, the client can transfer data to the server several times,
# but the server can only return a response once.)
def CStreamMethod(self, request_iterator, context):
print("CStreamMethod called by client...")
for req in request_iterator:
print(f"recv from client({req.Cid}), message={req.ReqMsg}")
resp = demo_pb2.Response(Sid=ServerId, RespMsg="Python server CStreamMethod ok")
return resp
# 服务端流模式（在一次调用中, 客户端只能一次向服务器传输数据, 但是服务器可以多次返回响应）
# Server Streaming (In a single call, the client can only transmit data to the server at one time,
# but the server can return the response many times.)
def SStreamMethod(self, request, context):
print(f"SStreamMethod called by client({request.Cid}), message={request.ReqMsg}")
# 创建一个生成器
def resp_msgs():
for i in range(5):
resp = demo_pb2.Response(Sid=ServerId, RespMsg=f"send by Python server, message={i}")
yield resp
return resp_msgs()
# 双向流模式 (在一次调用中, 客户端和服务器都可以向对方多次收发数据)
# Bidirectional Streaming (In a single call, both client and server can send and receive data
# to each other multiple times.)
def TWFMethod(self, request_iterator, context):
# 开启一个子线程去接收数据
# Open a sub thread to receive data
def parse_req():
for req in request_iterator:
print(f"recv from client{req.Cid}, message={req.ReqMsg}")
t = Thread(target=parse_req)
t.start()
for i in range(5):
yield demo_pb2.Response(Sid=ServerId, RespMsg=f"send by Python server, message={i}")
t.join()
def main():
server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
demo_pb2_grpc.add_GRPCDemoServicer_to_server(DemoServer(), server)
server.add_insecure_port(ServerAddress)
print("------------------start Python GRPC server")
server.start()
# In python3, `server` have no attribute `wait_for_termination`
while 1:
time.sleep(10)
if __name__ == '__main__':
main()

37
examples/python/easy_start_demo/README.md
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## easyDemo for using GRPC in Python
###主要是介绍了在Python中使用GRPC时, 进行数据传输的四种方式。
###This paper mainly introduces four ways of data transmission when GRPC is used in Python.
- ####简单模式 (Unary)
```text
没啥好说的,跟调普通方法没差
There's nothing to say. It's no different from the usual way.
```
- ####客户端流模式 (Client Streaming)
```text
在一次调用中, 客户端可以多次向服务器传输数据, 但是服务器只能返回一次响应.
In a single call, the client can transfer data to the server several times,
but the server can only return a response once.
```
- ####服务端流模式 (Server Streaming)
```text
在一次调用中, 客户端只能一次向服务器传输数据, 但是服务器可以多次返回响应
In a single call, the client can only transmit data to the server at one time,
but the server can return the response many times.
```
- ####双向流模式 (Bidirectional Streaming)
```text
在一次调用中, 客户端和服务器都可以向对方多次收发数据
In a single call, both client and server can send and receive data
to each other multiple times.
```
----
Author: Zhongying Wang
Email: kerbalwzy@gmail.com
License: MPL2
DateTime: 2019-08-13T23:30:00Z
PythonVersion: Python3.6.3

174
examples/python/easy_start_demo/customGrpcPackages/demo_pb2.py
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# -*- coding: utf-8 -*-
# Generated by the protocol buffer compiler. DO NOT EDIT!
# source: demo.proto
import sys
_b=sys.version_info[0]<3 and (lambda x:x) or (lambda x:x.encode('latin1'))
from google.protobuf import descriptor as _descriptor
from google.protobuf import message as _message
from google.protobuf import reflection as _reflection
from google.protobuf import symbol_database as _symbol_database
# @@protoc_insertion_point(imports)
_sym_db = _symbol_database.Default()
DESCRIPTOR = _descriptor.FileDescriptor(
name='demo.proto',
package='demo',
syntax='proto3',
serialized_options=None,
serialized_pb=_b('\n\ndemo.proto\x12\x04\x64\x65mo\"&\n\x07Request\x12\x0b\n\x03\x43id\x18\x01 \x01(\x03\x12\x0e\n\x06ReqMsg\x18\x02 \x01(\t\"(\n\x08Response\x12\x0b\n\x03Sid\x18\x01 \x01(\x03\x12\x0f\n\x07RespMsg\x18\x02 \x01(\t2\xcd\x01\n\x08GRPCDemo\x12-\n\x0cSimpleMethod\x12\r.demo.Request\x1a\x0e.demo.Response\x12\x30\n\rCStreamMethod\x12\r.demo.Request\x1a\x0e.demo.Response(\x01\x12\x30\n\rSStreamMethod\x12\r.demo.Request\x1a\x0e.demo.Response0\x01\x12.\n\tTWFMethod\x12\r.demo.Request\x1a\x0e.demo.Response(\x01\x30\x01\x62\x06proto3')
)
_REQUEST = _descriptor.Descriptor(
name='Request',
full_name='demo.Request',
filename=None,
file=DESCRIPTOR,
containing_type=None,
fields=[
_descriptor.FieldDescriptor(
name='Cid', full_name='demo.Request.Cid', index=0,
number=1, type=3, cpp_type=2, label=1,
has_default_value=False, default_value=0,
message_type=None, enum_type=None, containing_type=None,
is_extension=False, extension_scope=None,
serialized_options=None, file=DESCRIPTOR),
_descriptor.FieldDescriptor(
name='ReqMsg', full_name='demo.Request.ReqMsg', index=1,
number=2, type=9, cpp_type=9, label=1,
has_default_value=False, default_value=_b("").decode('utf-8'),
message_type=None, enum_type=None, containing_type=None,
is_extension=False, extension_scope=None,
serialized_options=None, file=DESCRIPTOR),
],
extensions=[
],
nested_types=[],
enum_types=[
],
serialized_options=None,
is_extendable=False,
syntax='proto3',
extension_ranges=[],
oneofs=[
],
serialized_start=20,
serialized_end=58,
)
_RESPONSE = _descriptor.Descriptor(
name='Response',
full_name='demo.Response',
filename=None,
file=DESCRIPTOR,
containing_type=None,
fields=[
_descriptor.FieldDescriptor(
name='Sid', full_name='demo.Response.Sid', index=0,
number=1, type=3, cpp_type=2, label=1,
has_default_value=False, default_value=0,
message_type=None, enum_type=None, containing_type=None,
is_extension=False, extension_scope=None,
serialized_options=None, file=DESCRIPTOR),
_descriptor.FieldDescriptor(
name='RespMsg', full_name='demo.Response.RespMsg', index=1,
number=2, type=9, cpp_type=9, label=1,
has_default_value=False, default_value=_b("").decode('utf-8'),
message_type=None, enum_type=None, containing_type=None,
is_extension=False, extension_scope=None,
serialized_options=None, file=DESCRIPTOR),
],
extensions=[
],
nested_types=[],
enum_types=[
],
serialized_options=None,
is_extendable=False,
syntax='proto3',
extension_ranges=[],
oneofs=[
],
serialized_start=60,
serialized_end=100,
)
DESCRIPTOR.message_types_by_name['Request'] = _REQUEST
DESCRIPTOR.message_types_by_name['Response'] = _RESPONSE
_sym_db.RegisterFileDescriptor(DESCRIPTOR)
Request = _reflection.GeneratedProtocolMessageType('Request', (_message.Message,), {
'DESCRIPTOR' : _REQUEST,
'__module__' : 'demo_pb2'
# @@protoc_insertion_point(class_scope:demo.Request)
})
_sym_db.RegisterMessage(Request)
Response = _reflection.GeneratedProtocolMessageType('Response', (_message.Message,), {
'DESCRIPTOR' : _RESPONSE,
'__module__' : 'demo_pb2'
# @@protoc_insertion_point(class_scope:demo.Response)
})
_sym_db.RegisterMessage(Response)
_GRPCDEMO = _descriptor.ServiceDescriptor(
name='GRPCDemo',
full_name='demo.GRPCDemo',
file=DESCRIPTOR,
index=0,
serialized_options=None,
serialized_start=103,
serialized_end=308,
methods=[
_descriptor.MethodDescriptor(
name='SimpleMethod',
full_name='demo.GRPCDemo.SimpleMethod',
index=0,
containing_service=None,
input_type=_REQUEST,
output_type=_RESPONSE,
serialized_options=None,
),
_descriptor.MethodDescriptor(
name='CStreamMethod',
full_name='demo.GRPCDemo.CStreamMethod',
index=1,
containing_service=None,
input_type=_REQUEST,
output_type=_RESPONSE,
serialized_options=None,
),
_descriptor.MethodDescriptor(
name='SStreamMethod',
full_name='demo.GRPCDemo.SStreamMethod',
index=2,
containing_service=None,
input_type=_REQUEST,
output_type=_RESPONSE,
serialized_options=None,
),
_descriptor.MethodDescriptor(
name='TWFMethod',
full_name='demo.GRPCDemo.TWFMethod',
index=3,
containing_service=None,
input_type=_REQUEST,
output_type=_RESPONSE,
serialized_options=None,
),
])
_sym_db.RegisterServiceDescriptor(_GRPCDEMO)
DESCRIPTOR.services_by_name['GRPCDemo'] = _GRPCDEMO
# @@protoc_insertion_point(module_scope)

99
examples/python/easy_start_demo/customGrpcPackages/demo_pb2_grpc.py
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# Generated by the gRPC Python protocol compiler plugin. DO NOT EDIT!
import grpc
from . import demo_pb2 as demo__pb2
class GRPCDemoStub(object):
"""服务service是用来gRPC的方法的, 格式固定
类似于Python中定义一个类, 类似于Golang中定义一个接口
"""
def __init__(self, channel):
"""Constructor.
Args:
channel: A grpc.Channel.
"""
self.SimpleMethod = channel.unary_unary(
'/demo.GRPCDemo/SimpleMethod',
request_serializer=demo__pb2.Request.SerializeToString,
response_deserializer=demo__pb2.Response.FromString,
)
self.CStreamMethod = channel.stream_unary(
'/demo.GRPCDemo/CStreamMethod',
request_serializer=demo__pb2.Request.SerializeToString,
response_deserializer=demo__pb2.Response.FromString,
)
self.SStreamMethod = channel.unary_stream(
'/demo.GRPCDemo/SStreamMethod',
request_serializer=demo__pb2.Request.SerializeToString,
response_deserializer=demo__pb2.Response.FromString,
)
self.TWFMethod = channel.stream_stream(
'/demo.GRPCDemo/TWFMethod',
request_serializer=demo__pb2.Request.SerializeToString,
response_deserializer=demo__pb2.Response.FromString,
)
class GRPCDemoServicer(object):
"""服务service是用来gRPC的方法的, 格式固定
类似于Python中定义一个类, 类似于Golang中定义一个接口
"""
def SimpleMethod(self, request, context):
"""简单模式
"""
context.set_code(grpc.StatusCode.UNIMPLEMENTED)
context.set_details('Method not implemented!')
raise NotImplementedError('Method not implemented!')
def CStreamMethod(self, request_iterator, context):
"""客户端流模式（在一次调用中, 客户端可以多次向服务器传输数据, 但是服务器只能返回一次响应）
"""
context.set_code(grpc.StatusCode.UNIMPLEMENTED)
context.set_details('Method not implemented!')
raise NotImplementedError('Method not implemented!')
def SStreamMethod(self, request, context):
"""服务端流模式（在一次调用中, 客户端只能一次向服务器传输数据, 但是服务器可以多次返回响应）
"""
context.set_code(grpc.StatusCode.UNIMPLEMENTED)
context.set_details('Method not implemented!')
raise NotImplementedError('Method not implemented!')
def TWFMethod(self, request_iterator, context):
"""双向流模式 (在一次调用中, 客户端和服务器都可以向对象多次收发数据)
"""
context.set_code(grpc.StatusCode.UNIMPLEMENTED)
context.set_details('Method not implemented!')
raise NotImplementedError('Method not implemented!')
def add_GRPCDemoServicer_to_server(servicer, server):
rpc_method_handlers = {
'SimpleMethod': grpc.unary_unary_rpc_method_handler(
servicer.SimpleMethod,
request_deserializer=demo__pb2.Request.FromString,
response_serializer=demo__pb2.Response.SerializeToString,
),
'CStreamMethod': grpc.stream_unary_rpc_method_handler(
servicer.CStreamMethod,
request_deserializer=demo__pb2.Request.FromString,
response_serializer=demo__pb2.Response.SerializeToString,
),
'SStreamMethod': grpc.unary_stream_rpc_method_handler(
servicer.SStreamMethod,
request_deserializer=demo__pb2.Request.FromString,
response_serializer=demo__pb2.Response.SerializeToString,
),
'TWFMethod': grpc.stream_stream_rpc_method_handler(
servicer.TWFMethod,
request_deserializer=demo__pb2.Request.FromString,
response_serializer=demo__pb2.Response.SerializeToString,
),
}
generic_handler = grpc.method_handlers_generic_handler(
'demo.GRPCDemo', rpc_method_handlers)
server.add_generic_rpc_handlers((generic_handler,))

51
examples/python/easy_start_demo/demo.proto
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// 语法版本声明，必须放在非注释的第一行
// Syntax version declaration, Must be placed on the first line of non-commentary
syntax = "proto3";
// 包名定义, Python中使用时可以省略不写(PS:我还要再Go中使用,所以留在这里了)
// Package name definition, which can be omitted in Python (PS: I'll use it again in Go, so stay here)
package demo;
/*
`message`是用来定义传输的数据的格式的, 等号后面的是字段编号
消息定义中的每个字段都有唯一的编号
总体格式类似于Python中定义一个类或者Golang中定义一个结构体
*/
/*
`message` is used to define the structure of the data to be transmitted, After the equal sign is the field number.
Each field in the message definition has a unique number.
The overall format is similar to defining a class in Python or a structure in Golang.
*/
message Request {
int64 Cid = 1;
string ReqMsg = 2;
}
message Response {
int64 Sid = 1;
string RespMsg = 2;
}
// service是用来给GRPC服务定义方法的, 格式固定, 类似于Golang中定义一个接口
// `service` is used to define methods for GRPC services in a fixed format, similar to defining an interface in Golang
service GRPCDemo {
// 简单模式
// Unary
rpc SimpleMethod (Request) returns (Response);
// 客户端流模式（在一次调用中, 客户端可以多次向服务器传输数据, 但是服务器只能返回一次响应）
// Client Streaming (In a single call, the client can transfer data to the server several times,
// but the server can only return a response once.)
rpc CStreamMethod (stream Request) returns (Response);
// 服务端流模式（在一次调用中, 客户端只能一次向服务器传输数据, 但是服务器可以多次返回响应）
// Server Streaming (In a single call, the client can only transmit data to the server at one time,
// but the server can return the response many times.)
rpc SStreamMethod (Request) returns (stream Response);
// 双向流模式 (在一次调用中, 客户端和服务器都可以向对方多次收发数据)
// Bidirectional Streaming (In a single call, both client and server can send and receive data
// to each other multiple times.)
rpc TWFMethod (stream Request) returns (stream Response);
}

3
examples/python/easy_start_demo/notes
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//自动生成代码
//Automatic code generation
>>> python -m grpc_tools.protoc -I ./ ./demo.proto --python_out=./customGrpcPackages --grpc_python_out=./customGrpcPackages
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