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const net = require('net'); | |
const responseParser = require('http-string-parser').parseResponse; | |
const makeCookieAuth = (user, password) => { | |
return new Buffer(user + ':' + password).toString('base64') | |
} | |
const makeRequest = (method, params, id) => { | |
return JSON.stringify({ | |
jsonrpc : "2.0", | |
method : method, | |
params : params, | |
id : id, | |
}) | |
} | |
const makeHeader = (host, authtoken, length) => { | |
return [ | |
"POST / HTTP/1.1", | |
"Host: " + host, | |
"Connection: Keep-Alive", | |
"Authorization: Basic " + authtoken, | |
"Content-Length: " + length | |
].join("\r\n") | |
} | |
const makeHTTPRequest = (header, content) => { | |
return header + '\r\n\r\n' + content | |
} | |
const recursiveParser = (n, buffer, callback) => { | |
if(buffer.length === 0) { | |
return {code:0, buffer:buffer} | |
} | |
if(n > 20) { | |
return {code:1, buffer:buffer} | |
} | |
const res = responseParser(buffer) | |
if(res.statusCode === void 0) { | |
return {code:0, buffer:buffer} | |
} | |
const size = res.headers['Content-Length'] | |
callback(res.body.slice(0, size), res.statusCode, res.headers, n) | |
return recursiveParser(n + 1, res.body.slice(size), callback) | |
} | |
const createPromiseResult = (resolve, reject) => { | |
return (err, result) => { | |
if(err) reject(err) | |
else resolve(result) | |
} | |
} | |
class MessageParser{ | |
constructor(callback){ | |
this.buffer = '' | |
this.callback = callback | |
} | |
run(chunk){ | |
this.buffer += chunk | |
while(true){ | |
const res = recursiveParser(0, this.buffer, this.callback) | |
this.buffer = res.buffer | |
if(res.code === 0){ | |
break; | |
} | |
} | |
} | |
} | |
class Client{ | |
constructor(port, host, user, password){ | |
this.port = port | |
this.host = host | |
this.hostname = [host, port].join(':') | |
this.authtoken = makeCookieAuth(user, password) | |
this.callback_message_queue = {} | |
this.id = 0; | |
this.mp = new MessageParser((body, code, headers, n) => { | |
this.onMessageRecv(JSON.parse(body)); | |
}); | |
const conn = this.conn = new net.Socket() | |
conn.setEncoding('utf8') | |
conn.setKeepAlive(true, 0) | |
conn.setNoDelay(true) | |
conn.on('connect', () => { | |
}) | |
conn.on('close', () => { | |
Object.keys(this.callback_message_queue).forEach((key) => { | |
this.callback_message_queue[key](new Error('close connect')) | |
delete this.callback_message_queue[key] | |
}) | |
}) | |
conn.on('data', (chunk) => { | |
this.mp.run(chunk) | |
}) | |
conn.on('end', () => { | |
}) | |
} | |
connect(){ | |
return new Promise((resolve, reject) => { | |
this.conn.connect(this.port, this.host, () => { | |
resolve() | |
}) | |
}) | |
} | |
close(){ | |
this.conn.end(); | |
this.conn.destroy(); | |
} | |
onMessageRecv(msg){ | |
if(msg instanceof Array){ | |
; // don't support batch request | |
} else { | |
const callback = this.callback_message_queue[msg.id] | |
if(callback){ | |
delete this.callback_message_queue[msg.id] | |
callback(null, msg) | |
} | |
} | |
} | |
request(method, params){ | |
return new Promise((resolve, reject) => { | |
const id = ++this.id; | |
const content = makeRequest(method, params, id); | |
const header = makeHeader(this.hostname, this.authtoken, content.length); | |
this.callback_message_queue[id] = createPromiseResult(resolve, reject); | |
this.conn.write(makeHTTPRequest(header, content)); | |
}) | |
} | |
} |
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parser の戻り値
buff、未処理バッファ
code、0:正常終了、1:継続可能
正常終了までループ
parserをrecursiveParserにする
深さを指定できるようにする