oorpc 0.1.2

An Object-oriented Binary RPC Framework

xrpc

An Object-oriented Binary RPC Framework

Library Usage

1. define service interface (.xidl)

// Greeter.xidl
class HelloReq {
    Str name
}

class HelloReply {
    Str msg
}

class Greeter {
    HelloReply sayHello(HelloReq req)
    sendFile(self, Stream)
}

2. generate code from xidl

xrpc-gen python Greeter.xidl

will got file Greeter.py

# Greeter.py
    class Greeter 接口定义
    class PrGreeter 代理
    class SrGreeter 服务

3. 实现服务

1. 继承并实现SrGreeter

class GreeterService(SrGreeter):
    def sayHello(req: HelloReq) -> HelloReply:
        print('hello %s' % req.name)
        return HelloReply('Hello, ', req.name)

    def sendFile(file: Stream) -> None:
        save_dir = '__temp/'
        if not os.path.exists(save_dir):
            os.mkdir(save_dir)
        s = FileWriterStream(file, save_dir + file.name)
        self.channel.registerStream(s) # will receive the stream

2. 继承并实现默认服务SrPeer的查找服务接口

class MyPeerService(SrPeer):
    def getService(name: str) -> IInterface:
        if name == Greeter.__name__:
            return GreeterService(self.channel)
        raise ValueError("service not found!")

4. 启动服务

config = Config()
peer = MyPeerService(config)
conn = WSConnection() # use websocket
async with conn.start(peer, 'greeter') as (ip, port):
    # server started, show qrcode
    qr = qrcode.QRCode()
    qr.border = 1
    qr.add_data("%s://%s:%d" % (conn.protocol, ip, port))
    qr.print_ascii(invert=True)
    await asyncio.Future() # wait forever

示例发布了一个名为greeter的websocket服务, 该服务可在局域网内自动发现

5. 调用服务接口

config = Config()
conn = WSConnection() # use websocket
async with conn.connect('greeter', config) as peer:
    # find service
    obj = await peer.getService(Greeter.__name__)
    greeter = PrGreeter(obj)

    # normal rpc call
    ret = await greeter.sayHello(HelloMsg('Daniel'))
    print(ret.msg) # Hello, Daniel
    
    # Send file
    file = FileReaderStream('file.txt')
    await greeter.sendFile(file) # call sendFile
    await peer.channel.sendStream(file) # send file stream

查找并连接名为greeter的websocket 服务

6. 加密握手协议

config中传入handshake即可配置握手协议. 协议实现HandShakeProtocal

config = Config(handshake=HandShakeV1())

握手和加密方式可自定义

7. 使用其他的连接协议

目前支持使用websocket(WSConnection)和tcp连接协议(TCPConnection), 如果想要自定义协议, 请实现Connection类

conn = MyCustomConnection() # use custom connection protocal

8. 局域网发现

默认打开局域网发现功能, 如果想要关闭, 则在启动服务时传入参数discoverable=False

async with conn.start(peer, name, discoverable=False) as (ip, port):
    ...