如何在Python中创建Socket.io客户端以与Sails服务器交谈
我正在运行一个SailsJS实例（v0.12.3），为此我有一个控制器MyModelController处理一个WebSocket（ socket.io ）连接，如果用户已通过身份验证，该连接将被允许。
MyModelController
module.exports = {
/**
* Socket connection
*/
connect: function(req, res) {
/* Checks it's a socket connection request */
if (!req.isSocket) { return res.badRequest();}
/* Checks it's authenticated */
if (req.session.me) {
User.findOne(req.session.me, function (err, me) {
if (req.param('name')) {
MyModel.findOne({
name: req.param('name')
}).exec(function(err, objectFound) {
/* e.g. Join a room named after the params passed */
sails.sockets.join(req, objectFound.name);
return res.ok({ message: "All is OK!"}});
});
}
});
}
}
}
从SailsJS服务页面，例如myPage.ejs ，这很好运行：
<!DOCTYPE html>
<html>
<head>...</head>
<body>
...
<script src="/js/dependencies/sails.io.js"></script>
<script src="/js/dependencies/app.io.js"></script>
<script src="/vendor/jquery/jquery.min.js"></script>
<script type "text/javascript">
// Use .get() to contact the server
io.socket.get('/myModel/connect?name=john', function gotResponse(body, response) {
console.log('Status code ' + response.statusCode + ' & data: ', body);
});
</script>
</body>
</html>
我如何从Python客户端连接到SailsJS socket.io服务器？
在我的第一次尝试中，我试图稍后离开认证部分。 所以，让我们说，我们现在不必担心它。
我安装了一个Python socket.io客户端pip install socketIO-client-2请参阅socketIO-client-2文档。
对于初学者来说，尝试这一点（哦，顺便说一句，我正在使用自签名证书的安全连接）：
from socketIO_client import SocketIO
SocketIO('https://localhost:1337/myModel/connect', params={'name': 'john'}, verify=False)
但是之后我立即在Sails服务器端发生错误：
verbose: Sending 400 ("Bad Request") response
在客户端出现错误
Failed to establish a new connection: [Errno 61] Connection refused
所以我评论了套接字连接请求和验证检查，以使其更简单，希望能够找出答案。
connect: function(req, res) {
if (req.param('name')) {
MyModel.findOne({
name: req.param('name')
}).exec(function(err, objectFound) {
console.log(req.socket.id);
console.log(param('name'));
sails.sockets.join(req, objectFound.name);
return res.ok({ message: "All is OK!"}});
});
} else {
console.log('No params passed to the websocket');
}
}
这在Sails方面给了我：
connect > found object: { name: 'john',
id: 1,
createdAt: '2016-11-04T15:20:38.000Z',
updatedAt: '2016-11-04T15:20:38.000Z' }
Socket request undefined <============== UNDEFINED
warn: Attempted to call `sailsSockets.join`, but the first argument was not a socket.
Socket Id: undefined
我的Python日志：
/usr/local/lib/python2.7/site-packages/requests/packages/urllib3/connectionpool.py:843: InsecureRequestWarning: Unverified HTTPS request is being made. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings
InsecureRequestWarning)
Traceback (most recent call last):
File "wsclient.py", line 17, in <module>
SocketIO('https://localhost:1337/myModel/connect', params={'name': 'john'}, verify=False)
File "/usr/local/lib/python2.7/site-packages/socketIO_client/__init__.py", line 334, in __init__
resource, hurry_interval_in_seconds, **kw)
File "/usr/local/lib/python2.7/site-packages/socketIO_client/__init__.py", line 51, in __init__
self._transport
File "/usr/local/lib/python2.7/site-packages/socketIO_client/__init__.py", line 59, in _transport
self._engineIO_session = self._get_engineIO_session()
File "/usr/local/lib/python2.7/site-packages/socketIO_client/__init__.py", line 73, in _get_engineIO_session
transport.recv_packet())
File "/usr/local/lib/python2.7/site-packages/socketIO_client/transports.py", line 81, in recv_packet
for engineIO_packet in decode_engineIO_content(response.content):
File "/usr/local/lib/python2.7/site-packages/socketIO_client/parsers.py", line 95, in decode_engineIO_content
content, content_index)
File "/usr/local/lib/python2.7/site-packages/socketIO_client/parsers.py", line 202, in _read_packet_length
while get_byte(content, content_index) not in [0, 1]:
File "/usr/local/lib/python2.7/site-packages/socketIO_client/symmetries.py", line 28, in get_byte
return six.indexbytes(x, index)
File "/usr/local/lib/python2.7/site-packages/six.py", line 655, in indexbytes
return ord(buf[i])
IndexError: string index out of range
任何指针？
有趣的链接：
当NodeJS + sails.io.js
我想我想实现这一点，但在Python中
var socketIOClient = require('socket.io-client');
var sailsIOClient = require('sails.io.js');
// Instantiate the socket client (`io`)
// (for now, you must explicitly pass in the socket.io client when using this library from Node.js)
var io = sailsIOClient(socketIOClient);
// Set some options:
// (you have to specify the host and port of the Sails backend when using this library from Node.js)
io.sails.url = 'http://localhost:1337';
// ...
// Send a GET request to `http://localhost:1337/hello`:
io.socket.get('/hello', function serverResponded (body, JWR) {
// body === JWR.body
console.log('Sails responded with: ', body);
console.log('with headers: ', JWR.headers);
console.log('and with status code: ', JWR.statusCode);
// When you are finished with `io.socket`, or any other sockets you connect manually,
// you should make sure and disconnect them, e.g.:
io.socket.disconnect();
// (note that there is no callback argument to the `.disconnect` method)
});
这在连接时会给出这个日志
$ DEBUG=* node sio-client.js
socket.io-client:url parse https://localhost:1337 +0ms
socket.io-client new io instance for https://localhost:1337 +5ms
socket.io-client:manager readyState closed +3ms
socket.io-client:manager opening https://localhost:1337 +0ms
engine.io-client:socket creating transport "websocket" +1ms
engine.io-client:socket setting transport websocket +29ms
socket.io-client:manager connect attempt will timeout after 20000 +0ms
socket.io-client:manager readyState opening +7ms
engine.io-client:socket socket receive: type "open", data "{"sid":"hj4FCwhk_pQ3hoTbAAAE","upgrades":[],"pingInterval":25000,"pingTimeout":60000}" +17ms
engine.io-client:socket socket open +0ms
socket.io-client:manager open +0ms
socket.io-client:manager cleanup +1ms
socket.io-client:socket transport is open - connecting +0ms
engine.io-client:socket socket receive: type "message", data "0" +215ms
socket.io-parser decoded 0 as {"type":0,"nsp":"/"} +0ms
socket.io-client:socket emitting packet with ack id 0 +3ms
socket.io-client:manager writing packet {"type":2,"data":["get",{"method":"get","headers":{},"data":{},"url":"/mymodel/connect?name=john"}],"options":{"compress":true},"id":0,"nsp":"/"} +0ms
socket.io-parser encoding packet {"type":2,"data":["get",{"method":"get","headers":{},"data":{},"url":"/mymodel/connect?name=john"}],"options":{"compress":true},"id":0,"nsp":"/"} +2ms
socket.io-parser encoded {"type":2,"data":["get",{"method":"get","headers":{},"data":{},"url":"/mymodel/connect?name=john"}],"options":{"compress":true},"id":0,"nsp":"/"} as 20["get",{"method":"get","headers":{},"data":{},"url":"/mymodel/connect?name=john"}] +0ms
engine.io-client:socket flushing 1 packets in socket +1ms
|> Now connected to Sails.
___/ For help, see: http:
(using sails.io.js node SDK @v1.1.0)
engine.io-client:socket socket receive: type "message", data "30[{"body":{"mymodel":{"name":"john","id":1,"createdAt":"2016-11-04T15:20:38.000Z","updatedAt":"2016-11-04T15:20:38.000Z","assembly":"drive"},"message":"DRIVE, Joined room john"},"headers":{"Access-Control-Allow-Origin":"","Access-Control-Allow-Credentials":"","Access-Control-Allow-Methods":"","Access-Control-Allow-Headers":"","Access-Control-Expose-Headers":"","access-control-allow-origin":"","access-control-allow-credentials":"","access-control-allow-methods":"","access-control-allow-headers":"","access-control-expose-headers":""},"statusCode":200}]" +242ms
socket.io-parser decoded 30[{"body":{"mymodel":{"name":"john","id":1,"createdAt":"2016-11-04T15:20:38.000Z","updatedAt":"2016-11-04T15:20:38.000Z","assembly":"drive"},"message":"DRIVE, Joined room john"},"headers":{"Access-Control-Allow-Origin":"","Access-Control-Allow-Credentials":"","Access-Control-Allow-Methods":"","Access-Control-Allow-Headers":"","Access-Control-Expose-Headers":"","access-control-allow-origin":"","access-control-allow-credentials":"","access-control-allow-methods":"","access-control-allow-headers":"","access-control-expose-headers":""},"statusCode":200}] as {"type":3,"nsp":"/","id":0,"data":[{"body":{"mymodel":{"name":"john","id":1,"createdAt":"2016-11-04T15:20:38.000Z","updatedAt":"2016-11-04T15:20:38.000Z","assembly":"drive"},"message":"DRIVE, Joined room john"},"headers":{"Access-Control-Allow-Origin":"","Access-Control-Allow-Credentials":"","Access-Control-Allow-Methods":"","Access-Control-Allow-Headers":"","Access-Control-Expose-Headers":"","access-control-allow-origin":"","access-control-allow-credentials":"","access-control-allow-methods":"","access-control-allow-headers":"","access-control-expose-headers":""},"statusCode":200}]} +244ms
socket.io-client:socket calling ack 0 with [{"body":{"mymodel":{"name":"john","id":1,"createdAt":"2016-11-04T15:20:38.000Z","updatedAt":"2016-11-04T15:20:38.000Z","assembly":"drive"},"message":"DRIVE, Joined room john"},"headers":{"Access-Control-Allow-Origin":"","Access-Control-Allow-Credentials":"","Access-Control-Allow-Methods":"","Access-Control-Allow-Headers":"","Access-Control-Expose-Headers":"","access-control-allow-origin":"","access-control-allow-credentials":"","access-control-allow-methods":"","access-control-allow-headers":"","access-control-expose-headers":""},"statusCode":200}] +1ms
hello again
Sails responded with: { mymodel:
{ name: 'john',
id: 1,
createdAt: '2016-11-04T15:20:38.000Z',
updatedAt: '2016-11-04T15:20:38.000Z',
assembly: 'drive' },
message: 'DRIVE, Joined room john' }
with headers: { 'Access-Control-Allow-Origin': '',
'Access-Control-Allow-Credentials': '',
'Access-Control-Allow-Methods': '',
'Access-Control-Allow-Headers': '',
'Access-Control-Expose-Headers': '',
'access-control-allow-origin': '',
'access-control-allow-credentials': '',
'access-control-allow-methods': '',
'access-control-allow-headers': '',
'access-control-expose-headers': '' }
and with status code: 200
注意它正在写数据包
{
"type":2,
"data":[
"get",
{
"method":"get",
"headers":{},
"data":{},
"url":"/myModel/connect?name=john"
}
],
"options":{
"compress":true
},
"id":0,
"nsp":"/"
}
尝试副作用的建议
这里是我运行pastebin的代码
在风帆边
verbose: Could not fetch session, since connecting socket has no cookie (is this a cross-origin socket?)
Generated a one-time-use cookie:sails.sid=s%3AR-Sm_JeWKoqayZOku-EvxPR_uUpilwVU.3yRUVjmYSpCl%2BeT4sJIOH%2BUTOL3EjWFabDKbswSlkdIand saved it on the socket handshake.
This will start this socket off with an empty session, i.e. (req.session === {})
That "anonymous" section will only last until the socket is disconnected unless you persist the session id in your database,
or by setting the set-cookie response header for an HTTP request that you *know* came from the same user (etc)
Alternatively, just make sure the socket sends a `cookie` header or query param when it initially connects.
在socket.io python客户端调试信息：
/usr/local/lib/python2.7/dist-packages/requests/packages/urllib3/util/ssl_.py:334: SNIMissingWarning: An HTTPS request has been made, but the SNI (Subject Name Indication) extension to TLS is not available on this platform. This may cause the server to present an incorrect TLS certificate, which can cause validation failures. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings
SNIMissingWarning
/usr/local/lib/python2.7/dist-packages/requests/packages/urllib3/util/ssl_.py:132: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings
InsecurePlatformWarning
/usr/local/lib/python2.7/dist-packages/requests/packages/urllib3/connectionpool.py:843: InsecureRequestWarning: Unverified HTTPS request is being made. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings
InsecureRequestWarning)
DEBUG:root:192.168.178.20:1337/socket.io [transport selected] websocket
DEBUG:root:192.168.178.20:1337/socket.io [heartbeat reset]
DEBUG:root:192.168.178.20:1337/socket.io [socket.io packet sent] 21["get", {"url": "/path/connect", "headers": {}, "data": {"name": "john"}, "method": "get"}]
DEBUG:root:192.168.178.20:1337/socket.io [socket.io packet received] 0
似乎它需要您花时间在给定的Socketio库周围创建一个sails.io.js兼容python包装器。 所以我想在阅读客户端库的源代码的同时分享实现。
这里的sails.io.js库是这样做的，它通过发送以下数据的socketio客户端将.get ， .post ， .put函数转换为请求。
用http://localhost:1337初始化socketio客户端库
数据传递到emit ，如下所述功能作为一个字典，
常见的emit数据结构是
emit_data = {
'method' : 'get', # get, post, delete depends on requirement
'headers' : {'header_key': 'header_value'}, # for passing headers
'data': {'key': 'value'}, # for sending /search/?q=hello, {'q': 'hello'}
'url': '/hello' #
}
如果您需要将最后一个nodejs片段转换为此客户端
import requests
from socketIO_client import SocketIO
def server_responded(*body):
print 'response', body
# first we need to get cookie headers for connection
r = requests.get('localhost:1337/__getcookie/')
emit_data = {
'method' : 'get',
'url': '/hello',
'headers': {'Cookie': r.headers['Set-Cookie']},
}
# update emit_data with extra headers if needed
with SocketIO('localhost', 1337) as socketIO:
# note: event parameter is request method, here get for GET
# second parameter is emit_data structured as described above
socketIO.emit(emit_data['method'], emit_data, server_responded)
# adjust with your requirements
socketIO.wait_for_callbacks(seconds=1)
我永远无法解决我的问题，所以我通过创建一个中继服务器来转发Sails.io连接中的消息到socket.io连接，反之亦然。
我使用Flask SocketIO在我的Python模块中创建了一个socket.io服务器，然后让我的中继连接了python服务器（socket.io）和Sails服务器（Sails.io）。
当从SailsJS（Sails.io）接收到的消息发送/转发给python服务器（socket.io）时。
在我的示例中， Sails.io客户端首先对Sails进行身份验证，但是我没有为python服务器实现身份验证。
// Connects to SailsIO on SailsJS instance
var sailsIO = require('sails.io.js')(require('socket.io-client'));
// Connects to SocketIO server
var socketIO = require('socket.io-client')('https://localhost:7000');
socketIO.on('connect', function() {
console.log("Connect");
});
socketIO.on('disconnect', function() {
console.log("Disconnect");
});
var request = require('request');
var inspect = require('eyespect').inspector({
styles: {
all: 'magenta'
}
});
process.env.NODE_TLS_REJECT_UNAUTHORIZED = "0"; // Ignore the certs
/* Options */
sailsIO.sails.url = 'https://192.168.178.20:1337';
sailsIO.sails.rejectUnauthorized = false;
// ...
/* Authenticate */
var authJson = {
"email": "me@domain.com",
"password": "mypassword"
};
var options = {
method: 'put',
body: authJson,
json: true,
url: 'https://192.168.178.20:1337/login',
headers: {
'Content-Type': 'application/json'
}
}
request(options, function(err, res, body) {
if (err) {
inspect(err, 'error posting json')
return
}
var headers = res.headers
var statusCode = res.statusCode
var cookie = headers['set-cookie'][0].split(';')[0]
inspect(headers, 'headers');
inspect(cookie, "Cookie")
inspect(statusCode, 'statusCode');
inspect(body, 'body');
sailsIO.sails.headers = {
'Cookie': cookie
};
/* Connects to SailsJS */
sailsIO.socket.request({
method: 'get',
url: '/path/to',
data: {
name: 'john'
},
headers: {
'Cookie': cookie
}
}, function(resData, jwres) {
inspect(jwres, "jwres");
if (jwres.error) {
console.log(jwres.statusCode); // => e.g. 403
return;
}
console.log(jwres.statusCode); // => e.g. 200
});
});
sailsIO.socket.on('connecting', function() {
console.log('Connecting to server');
});
sailsIO.socket.on('hello', function(data) {
inspect(JSON.stringify(data), "hello (someone connected)");
});
/**
* On message from Sails, re-emit to python SocketIO server via socket.io client
*/
sailsIO.socket.on('event', function(data) {
inspect(JSON.stringify(data), "Data received");
socketIO.emit('event', data);
});
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