{"id":8912,"date":"2023-09-11T13:53:24","date_gmt":"2023-09-11T05:53:24","guid":{"rendered":"\/?p=8912"},"modified":"2023-09-11T13:53:24","modified_gmt":"2023-09-11T05:53:24","slug":"python%e5%ae%9e%e7%8e%b0rpc%e8%bf%9c%e7%a8%8b%e6%96%b9%e6%b3%95%e8%b0%83%e7%94%a8","status":"publish","type":"post","link":"\/?p=8912","title":{"rendered":"Python\u5b9e\u73b0RPC\u8fdc\u7a0b\u65b9\u6cd5\u8c03\u7528"},"content":{"rendered":"<h2>\u5b9e\u73b0\u65b9\u6cd5<\/h2>\n<p>\u5c06\u51fd\u6570\u8bf7\u6c42\u3001\u53c2\u6570\u548c\u8fd4\u56de\u503c\u4f7f\u7528pickle\u7f16\u7801\u540e\uff0c\u5728\u4e0d\u540c\u7684\u89e3\u91ca\u5668\u76f4\u63a5\u4f20\u9001pickle\u5b57\u8282\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u5f88\u5bb9\u6613\u7684\u5b9e\u73b0RPC\u3002 \u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684PRC\u5904\u7406\u5668\uff0c\u53ef\u4ee5\u88ab\u6574\u5408\u5230\u4e00\u4e2a\u670d\u52a1\u5668\u4e2d\u53bb\uff1a<\/p>\n<pre><code class=\"language-python\"># rpcserver.py\n\nimport pickle\nclass RPCHandler:\n    def __init__(self):\n        self._functions = { }\n\n    def register_function(self, func):\n        self._functions[func.__name__] = func\n\n    def handle_connection(self, connection):\n        try:\n            while True:\n                # Receive a message\n                func_name, args, kwargs = pickle.loads(connection.recv())\n                # Run the RPC and send a response\n                try:\n                    r = self._functions[func_name](*args,**kwargs)\n                    connection.send(pickle.dumps(r))\n                except Exception as e:\n                    connection.send(pickle.dumps(e))\n        except EOFError:\n             pass\n<\/code><\/pre>\n<p>\u8981\u4f7f\u7528\u8fd9\u4e2a\u5904\u7406\u5668\uff0c\u4f60\u9700\u8981\u5c06\u5b83\u52a0\u5165\u5230\u4e00\u4e2a\u6d88\u606f\u670d\u52a1\u5668\u4e2d\u3002\u4f60\u6709\u5f88\u591a\u79cd\u9009\u62e9\uff0c \u4f46\u662f\u4f7f\u7528 <code>multiprocessing<\/code> \u5e93\u662f\u6700\u7b80\u5355\u7684\u3002\u4e0b\u9762\u662f\u4e00\u4e2aRPC\u670d\u52a1\u5668\u4f8b\u5b50\uff1a<\/p>\n<pre><code class=\"language-python\">from multiprocessing.connection import Listener\nfrom threading import Thread\n\ndef rpc_server(handler, address, authkey):\n    sock = Listener(address, authkey=authkey)\n    while True:\n        client = sock.accept()\n        t = Thread(target=handler.handle_connection, args=(client,))\n        t.daemon = True\n        t.start()\n\n# Some remote functions\ndef add(x, y):\n    return x + y\n\ndef sub(x, y):\n    return x - y\n\n# Register with a handler\nhandler = RPCHandler()\nhandler.register_function(add)\nhandler.register_function(sub)\n\n# Run the server\nrpc_server(handler, (&#039;localhost&#039;, 17000), authkey=b&#039;peekaboo&#039;)\n<\/code><\/pre>\n<p><img src=\"https:\/\/lemon-guess.oss-cn-hangzhou.aliyuncs.com\/img\/image-20230911120025380.png\" alt=\"image-20230911120025380\" \/><\/p>\n<p>\u4e3a\u4e86\u4ece\u4e00\u4e2a\u8fdc\u7a0b\u5ba2\u6237\u7aef\u8bbf\u95ee\u670d\u52a1\u5668\uff0c\u4f60\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u5bf9\u5e94\u7684\u7528\u6765\u4f20\u9001\u8bf7\u6c42\u7684RPC\u4ee3\u7406\u7c7b\u3002\u4f8b\u5982<\/p>\n<pre><code class=\"language-python\">import pickle\n\nclass RPCProxy:\n    def __init__(self, connection):\n        self._connection = connection\n    def __getattr__(self, name):\n        def do_rpc(*args, **kwargs):\n            self._connection.send(pickle.dumps((name, args, kwargs)))\n            result = pickle.loads(self._connection.recv())\n            if isinstance(result, Exception):\n                raise result\n            return result\n        return do_rpc\n<\/code><\/pre>\n<p>\u8981\u4f7f\u7528\u8fd9\u4e2a\u4ee3\u7406\u7c7b\uff0c\u4f60\u9700\u8981\u5c06\u5176\u5305\u88c5\u5230\u4e00\u4e2a\u670d\u52a1\u5668\u7684\u8fde\u63a5\u4e0a\u9762\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre><code class=\"language-python\">>&gt;&gt; from multiprocessing.connection import Client\n>&gt;&gt; c = Client((&#039;localhost&#039;, 17000), authkey=b&#039;peekaboo&#039;)\n>&gt;&gt; proxy = RPCProxy(c)\n>&gt;&gt; proxy.add(2, 3)\n\n5\n>&gt;&gt; proxy.sub(2, 3)\n-1\n>&gt;&gt; proxy.sub([1, 2], 4)\nTraceback (most recent call last):\n  File &quot;&lt;stdin&gt;&quot;, line 1, in &lt;module&gt;\n  File &quot;rpcserver.py&quot;, line 37, in do_rpc\n    raise result\nTypeError: unsupported operand type(s) for -: &#039;list&#039; and &#039;int&#039;\n>&gt;&gt;\n<\/code><\/pre>\n<p>\u8981\u6ce8\u610f\u7684\u662f\u5f88\u591a\u6d88\u606f\u5c42\uff08\u6bd4\u5982 <code>multiprocessing<\/code> \uff09\u5df2\u7ecf\u4f7f\u7528pickle\u5e8f\u5217\u5316\u4e86\u6570\u636e\u3002 \u5982\u679c\u662f\u8fd9\u6837\u7684\u8bdd\uff0c\u5bf9 <code>pickle.dumps()<\/code> \u548c <code>pickle.loads()<\/code> \u7684\u8c03\u7528\u8981\u53bb\u6389\u3002<\/p>\n<p><img src=\"https:\/\/lemon-guess.oss-cn-hangzhou.aliyuncs.com\/img\/image-20230911120038513.png\" alt=\"image-20230911120038513\" \/><\/p>\n<h2>Python \u5b9e\u73b0\u8fdc\u7a0b\u65b9\u6cd5\u8c03\u7528 \u8ba8\u8bba<\/h2>\n<p><code>RPCHandler<\/code> \u548c <code>RPCProxy<\/code> \u7684\u57fa\u672c\u601d\u8def\u662f\u5f88\u6bd4\u8f83\u7b80\u5355\u7684\u3002 \u5982\u679c\u4e00\u4e2a\u5ba2\u6237\u7aef\u60f3\u8981\u8c03\u7528\u4e00\u4e2a\u8fdc\u7a0b\u51fd\u6570\uff0c\u6bd4\u5982 <code>foo(1, 2, z=3)<\/code> ,\u4ee3\u7406\u7c7b\u521b\u5efa\u4e00\u4e2a\u5305\u542b\u4e86\u51fd\u6570\u540d\u548c\u53c2\u6570\u7684\u5143\u7ec4 <code>(&#039;foo&#039;, (1, 2), {&#039;z&#039;: 3})<\/code> \u3002 \u8fd9\u4e2a\u5143\u7ec4\u88abpickle\u5e8f\u5217\u5316\u540e\u901a\u8fc7\u7f51\u7edc\u8fde\u63a5\u53d1\u751f\u51fa\u53bb\u3002 \u8fd9\u4e00\u6b65\u5728 <code>RPCProxy<\/code> \u7684 <code>__getattr__()<\/code> \u65b9\u6cd5\u8fd4\u56de\u7684 <code>do_rpc()<\/code> \u95ed\u5305\u4e2d\u5b8c\u6210\u3002 \u670d\u52a1\u5668\u63a5\u6536\u540e\u901a\u8fc7pickle\u53cd\u5e8f\u5217\u5316\u6d88\u606f\uff0c\u67e5\u627e\u51fd\u6570\u540d\u770b\u770b\u662f\u5426\u5df2\u7ecf\u6ce8\u518c\u8fc7\uff0c\u7136\u540e\u6267\u884c\u76f8\u5e94\u7684\u51fd\u6570\u3002 \u6267\u884c\u7ed3\u679c(\u6216\u5f02\u5e38)\u88abpickle\u5e8f\u5217\u5316\u540e\u8fd4\u56de\u53d1\u9001\u7ed9\u5ba2\u6237\u7aef\u3002\u6211\u4eec\u7684\u5b9e\u4f8b\u9700\u8981\u4f9d\u8d56 <code>multiprocessing<\/code> \u8fdb\u884c\u901a\u4fe1\u3002 \u4e0d\u8fc7\uff0c\u8fd9\u79cd\u65b9\u5f0f\u53ef\u4ee5\u9002\u7528\u4e8e\u5176\u4ed6\u4efb\u4f55\u6d88\u606f\u7cfb\u7edf\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u60f3\u5728ZeroMQ\u4e4b\u4e0a\u5b9e\u4e60RPC\uff0c \u4ec5\u4ec5\u53ea\u9700\u8981\u5c06\u8fde\u63a5\u5bf9\u8c61\u6362\u6210\u5408\u9002\u7684ZeroMQ\u7684socket\u5bf9\u8c61\u5373\u53ef\u3002<\/p>\n<p>\u7531\u4e8e\u5e95\u5c42\u9700\u8981\u4f9d\u8d56pickle\uff0c\u90a3\u4e48\u5b89\u5168\u95ee\u9898\u5c31\u9700\u8981\u8003\u8651\u4e86 \uff08\u56e0\u4e3a\u4e00\u4e2a\u806a\u660e\u7684\u9ed1\u5ba2\u53ef\u4ee5\u521b\u5efa\u7279\u5b9a\u7684\u6d88\u606f\uff0c\u80fd\u591f\u8ba9\u4efb\u610f\u51fd\u6570\u901a\u8fc7pickle\u53cd\u5e8f\u5217\u5316\u540e\u88ab\u6267\u884c\uff09\u3002 \u56e0\u6b64\u4f60\u6c38\u8fdc\u4e0d\u8981\u5141\u8bb8\u6765\u81ea\u4e0d\u4fe1\u4efb\u6216\u672a\u8ba4\u8bc1\u7684\u5ba2\u6237\u7aef\u7684RPC\u3002\u7279\u522b\u662f\u4f60\u7edd\u5bf9\u4e0d\u8981\u5141\u8bb8\u6765\u81eaInternet\u7684\u4efb\u610f\u673a\u5668\u7684\u8bbf\u95ee\uff0c \u8fd9\u79cd\u53ea\u80fd\u5728\u5185\u90e8\u88ab\u4f7f\u7528\uff0c\u4f4d\u4e8e\u9632\u706b\u5899\u540e\u9762\u5e76\u4e14\u4e0d\u8981\u5bf9\u5916\u66b4\u9732\u3002<\/p>\n<p>\u4f5c\u4e3apickle\u7684\u66ff\u4ee3\uff0c\u4f60\u4e5f\u8bb8\u53ef\u4ee5\u8003\u8651\u4f7f\u7528JSON\u3001XML\u6216\u4e00\u4e9b\u5176\u4ed6\u7684\u7f16\u7801\u683c\u5f0f\u6765\u5e8f\u5217\u5316\u6d88\u606f\u3002 \u4f8b\u5982\uff0c\u672c\u673a\u5b9e\u4f8b\u53ef\u4ee5\u5f88\u5bb9\u6613\u7684\u6539\u5199\u6210JSON\u7f16\u7801\u65b9\u6848\u3002\u8fd8\u9700\u8981\u5c06 <code>pickle.loads()<\/code> \u548c <code>pickle.dumps()<\/code> \u66ff\u6362\u6210 <code>json.loads()<\/code> \u548c <code>json.dumps()<\/code> \u5373\u53ef\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b9e\u73b0\u65b9\u6cd5 \u5c06\u51fd\u6570\u8bf7\u6c42\u3001\u53c2\u6570\u548c\u8fd4\u56de\u503c\u4f7f\u7528pickle\u7f16\u7801\u540e\uff0c\u5728\u4e0d\u540c\u7684\u89e3\u91ca\u5668\u76f4\u63a5\u4f20\u9001pickle\u5b57\u8282\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u5f88\u5bb9\u6613\u7684\u5b9e\u73b0RPC\u3002 \u4e0b\u9762\u662f   \u2026 &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[200],"tags":[16,202],"_links":{"self":[{"href":"\/index.php?rest_route=\/wp\/v2\/posts\/8912"}],"collection":[{"href":"\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8912"}],"version-history":[{"count":1,"href":"\/index.php?rest_route=\/wp\/v2\/posts\/8912\/revisions"}],"predecessor-version":[{"id":8913,"href":"\/index.php?rest_route=\/wp\/v2\/posts\/8912\/revisions\/8913"}],"wp:attachment":[{"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8912"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8912"},{"taxonomy":"post_tag","embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8912"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}