Hugging Face's logo

Spaces:
PShowdown
/
Pokemon_server
Running

App Files Community
Pokemon_server
File size: 5,053 Bytes 
5c2ed06
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
 
'use strict';

const ClientConstants = require('../constants/client.js');
const CharsetToEncoding = require('../constants/charset_encodings.js');
const Packet = require('../packets/packet.js');

const auth41 = require('../auth_41.js');

class HandshakeResponse {
  constructor(handshake) {
    this.user = handshake.user || '';
    this.database = handshake.database || '';
    this.password = handshake.password || '';
    this.passwordSha1 = handshake.passwordSha1;
    this.authPluginData1 = handshake.authPluginData1;
    this.authPluginData2 = handshake.authPluginData2;
    this.compress = handshake.compress;
    this.clientFlags = handshake.flags;
    // TODO: pre-4.1 auth support
    let authToken;
    if (this.passwordSha1) {
      authToken = auth41.calculateTokenFromPasswordSha(
        this.passwordSha1,
        this.authPluginData1,
        this.authPluginData2
      );
    } else {
      authToken = auth41.calculateToken(
        this.password,
        this.authPluginData1,
        this.authPluginData2
      );
    }
    this.authToken = authToken;
    this.charsetNumber = handshake.charsetNumber;
    this.encoding = CharsetToEncoding[handshake.charsetNumber];
    this.connectAttributes = handshake.connectAttributes;
  }

  serializeResponse(buffer) {
    const isSet = flag => this.clientFlags & ClientConstants[flag];
    const packet = new Packet(0, buffer, 0, buffer.length);
    packet.offset = 4;
    packet.writeInt32(this.clientFlags);
    packet.writeInt32(0); // max packet size. todo: move to config
    packet.writeInt8(this.charsetNumber);
    packet.skip(23);
    const encoding = this.encoding;
    packet.writeNullTerminatedString(this.user, encoding);
    let k;
    if (isSet('PLUGIN_AUTH_LENENC_CLIENT_DATA')) {
      packet.writeLengthCodedNumber(this.authToken.length);
      packet.writeBuffer(this.authToken);
    } else if (isSet('SECURE_CONNECTION')) {
      packet.writeInt8(this.authToken.length);
      packet.writeBuffer(this.authToken);
    } else {
      packet.writeBuffer(this.authToken);
      packet.writeInt8(0);
    }
    if (isSet('CONNECT_WITH_DB')) {
      packet.writeNullTerminatedString(this.database, encoding);
    }
    if (isSet('PLUGIN_AUTH')) {
      // TODO: pass from config
      packet.writeNullTerminatedString('mysql_native_password', 'latin1');
    }
    if (isSet('CONNECT_ATTRS')) {
      const connectAttributes = this.connectAttributes || {};
      const attrNames = Object.keys(connectAttributes);
      let keysLength = 0;
      for (k = 0; k < attrNames.length; ++k) {
        keysLength += Packet.lengthCodedStringLength(attrNames[k], encoding);
        keysLength += Packet.lengthCodedStringLength(
          connectAttributes[attrNames[k]],
          encoding
        );
      }
      packet.writeLengthCodedNumber(keysLength);
      for (k = 0; k < attrNames.length; ++k) {
        packet.writeLengthCodedString(attrNames[k], encoding);
        packet.writeLengthCodedString(
          connectAttributes[attrNames[k]],
          encoding
        );
      }
    }
    return packet;
  }

  toPacket() {
    if (typeof this.user !== 'string') {
      throw new Error('"user" connection config property must be a string');
    }
    if (typeof this.database !== 'string') {
      throw new Error('"database" connection config property must be a string');
    }
    // dry run: calculate resulting packet length
    const p = this.serializeResponse(Packet.MockBuffer());
    return this.serializeResponse(Buffer.alloc(p.offset));
  }
  static fromPacket(packet) {
    const args = {};
    args.clientFlags = packet.readInt32();
    function isSet(flag) {
      return args.clientFlags & ClientConstants[flag];
    }
    args.maxPacketSize = packet.readInt32();
    args.charsetNumber = packet.readInt8();
    const encoding = CharsetToEncoding[args.charsetNumber];
    args.encoding = encoding;
    packet.skip(23);
    args.user = packet.readNullTerminatedString(encoding);
    let authTokenLength;
    if (isSet('PLUGIN_AUTH_LENENC_CLIENT_DATA')) {
      authTokenLength = packet.readLengthCodedNumber(encoding);
      args.authToken = packet.readBuffer(authTokenLength);
    } else if (isSet('SECURE_CONNECTION')) {
      authTokenLength = packet.readInt8();
      args.authToken = packet.readBuffer(authTokenLength);
    } else {
      args.authToken = packet.readNullTerminatedString(encoding);
    }
    if (isSet('CONNECT_WITH_DB')) {
      args.database = packet.readNullTerminatedString(encoding);
    }
    if (isSet('PLUGIN_AUTH')) {
      args.authPluginName = packet.readNullTerminatedString(encoding);
    }
    if (isSet('CONNECT_ATTRS')) {
      const keysLength = packet.readLengthCodedNumber(encoding);
      const keysEnd = packet.offset + keysLength;
      const attrs = {};
      while (packet.offset < keysEnd) {
        attrs[
          packet.readLengthCodedString(encoding)
        ] = packet.readLengthCodedString(encoding);
      }
      args.connectAttributes = attrs;
    }
    return args;
  }
}

module.exports = HandshakeResponse;