| 1 | import errno |
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| 2 | import select |
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| 3 | import socket |
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| 4 | import time |
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| 5 | import email |
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| 6 | from io import StringIO |
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| 7 | |
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| 8 | from src.HTTPParser import * |
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| 9 | from src.ogRest import * |
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| 10 | from enum import Enum |
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| 11 | |
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| 12 | class State(Enum): |
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| 13 | CONNECTING = 0 |
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| 14 | RECEIVING = 1 |
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| 15 | FORCE_DISCONNECTED = 2 |
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| 16 | |
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| 17 | class ogClient: |
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| 18 | def __init__(self, ip, port): |
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| 19 | self.ip = ip |
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| 20 | self.port = port |
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| 21 | self.ogrest = ogRest() |
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| 22 | |
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| 23 | def get_socket(self): |
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| 24 | return self.sock |
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| 25 | |
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| 26 | def get_state(self): |
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| 27 | return self.state |
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| 28 | |
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| 29 | def connect(self): |
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| 30 | print ('connecting') |
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| 31 | self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) |
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| 32 | self.sock.setblocking(0) |
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| 33 | self.state = State.CONNECTING |
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| 34 | self.data = "" |
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| 35 | self.trailer = False |
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| 36 | self.content_len = 0 |
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| 37 | |
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| 38 | try: |
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| 39 | self.sock.connect((self.ip, self.port)) |
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| 40 | except socket.error as err: |
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| 41 | if err.errno == errno.EINPROGRESS: |
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| 42 | return |
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| 43 | elif err.errno == errno.ECONNREFUSED: |
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| 44 | return |
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| 45 | |
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| 46 | print ('Error connect ' + str(err)) |
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| 47 | |
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| 48 | def send(self, msg): |
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| 49 | self.sock.send(bytes(msg, 'utf-8')) |
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| 50 | return len(msg) |
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| 51 | |
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| 52 | def connect2(self): |
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| 53 | try: |
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| 54 | self.sock.connect((self.ip, self.port)) |
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| 55 | except socket.error as err: |
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| 56 | if err.errno == errno.EISCONN: |
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| 57 | print ('connected') |
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| 58 | self.state = State.RECEIVING |
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| 59 | else: |
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| 60 | print ('connection refused, retrying...') |
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| 61 | self.state = State.CONNECTING |
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| 62 | self.sock.close() |
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| 63 | self.connect() |
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| 64 | |
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| 65 | def receive(self): |
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| 66 | try: |
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| 67 | data = self.sock.recv(1024).decode('utf-8') |
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| 68 | except socket.err as err: |
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| 69 | print ('Error3 ' + str(err)) |
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| 70 | |
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| 71 | if len(data) == 0: |
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| 72 | self.state = State.CONNECTING |
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| 73 | self.sock.close() |
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| 74 | self.connect() |
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| 75 | |
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| 76 | self.data = self.data + data |
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| 77 | httpparser = HTTPParser() |
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| 78 | |
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| 79 | if not self.trailer: |
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| 80 | if self.data.find("\r\n") > 0: |
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| 81 | # https://stackoverflow.com/questions/4685217/parse-raw-http-headers |
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| 82 | request_line, headers_alone = self.data.split('\n', 1) |
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| 83 | headers = email.message_from_file(StringIO(headers_alone)) |
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| 84 | |
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| 85 | if 'content-length' in headers.keys(): |
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| 86 | self.content_len = int(headers['content-length']) |
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| 87 | |
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| 88 | self.trailer = True |
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| 89 | |
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| 90 | if self.trailer and len(self.data) >= self.content_len: |
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| 91 | httpparser.parser(self.data) |
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| 92 | self.ogrest.processOperation(httpparser, self) |
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| 93 | |
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| 94 | # Cleanup state information from request |
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| 95 | self.data = "" |
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| 96 | self.content_len = 0 |
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| 97 | self.trailer = False |
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| 98 | |
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| 99 | def disconnect(self): |
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| 100 | self.state = State.FORCE_DISCONNECTED |
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| 101 | self.sock.close() |
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| 102 | |
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| 103 | def run(self): |
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| 104 | while 1: |
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| 105 | sock = self.get_socket() |
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| 106 | state = self.get_state() |
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| 107 | |
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| 108 | if state == State.CONNECTING: |
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| 109 | readset = [ sock ] |
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| 110 | writeset = [ sock ] |
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| 111 | elif state == State.FORCE_DISCONNECTED: |
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| 112 | return 0 |
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| 113 | else: |
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| 114 | readset = [ sock ] |
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| 115 | writeset = [ ] |
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| 116 | |
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| 117 | readable, writable, exception = select.select(readset, writeset, [ ]) |
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| 118 | if state == State.CONNECTING and sock in writable: |
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| 119 | self.connect2() |
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| 120 | elif state == State.RECEIVING and sock in readable: |
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| 121 | self.receive() |
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| 122 | else: |
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| 123 | print ('bad state' + str(state)) |
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