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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
import { bind } from 'decko';
import { saveAs } from 'file-saver';
import { IDisposable, ITerminalAddon, Terminal } from '@xterm/xterm';
import * as Zmodem from 'zmodem.js/src/zmodem_browser';
import { TrzszFilter } from 'trzsz';
export interface ZmodeOptions {
zmodem: boolean;
trzsz: boolean;
windows: boolean;
trzszDragInitTimeout: number;
onSend: () => void;
sender: (data: string | Uint8Array) => void;
writer: (data: string | Uint8Array) => void;
}
export class ZmodemAddon implements ITerminalAddon {
private disposables: IDisposable[] = [];
private terminal: Terminal;
private sentry: Zmodem.Sentry;
private session: Zmodem.Session;
private denier: () => void;
private trzszFilter: TrzszFilter;
constructor(private options: ZmodeOptions) {}
activate(terminal: Terminal) {
this.terminal = terminal;
if (this.options.zmodem) this.zmodemInit();
if (this.options.trzsz) this.trzszInit();
}
dispose() {
for (const d of this.disposables) {
d.dispose();
}
this.disposables.length = 0;
}
consume(data: ArrayBuffer) {
try {
if (this.options.trzsz) {
this.trzszFilter.processServerOutput(data);
} else {
this.sentry.consume(data);
}
} catch (e) {
console.error('[ttyd] zmodem consume: ', e);
this.reset();
}
}
@bind
private reset() {
this.terminal.options.disableStdin = false;
this.terminal.focus();
}
private addDisposableListener(target: EventTarget, type: string, listener: EventListener) {
target.addEventListener(type, listener);
this.disposables.push({ dispose: () => target.removeEventListener(type, listener) });
}
@bind
private trzszInit() {
const { terminal } = this;
const { sender, writer, zmodem } = this.options;
this.trzszFilter = new TrzszFilter({
writeToTerminal: data => {
if (!this.trzszFilter.isTransferringFiles() && zmodem) {
this.sentry.consume(data);
} else {
writer(typeof data === 'string' ? data : new Uint8Array(data as ArrayBuffer));
}
},
sendToServer: data => sender(data),
terminalColumns: terminal.cols,
isWindowsShell: this.options.windows,
dragInitTimeout: this.options.trzszDragInitTimeout,
});
const element = terminal.element as EventTarget;
this.addDisposableListener(element, 'dragover', event => event.preventDefault());
this.addDisposableListener(element, 'drop', event => {
event.preventDefault();
this.trzszFilter
.uploadFiles((event as DragEvent).dataTransfer?.items as DataTransferItemList)
.then(() => console.log('[ttyd] upload success'))
.catch(err => console.log('[ttyd] upload failed: ' + err));
});
this.disposables.push(terminal.onResize(size => this.trzszFilter.setTerminalColumns(size.cols)));
}
@bind
private zmodemInit() {
const { sender, writer } = this.options;
const { terminal, reset, zmodemDetect } = this;
this.session = null;
this.sentry = new Zmodem.Sentry({
to_terminal: octets => writer(new Uint8Array(octets)),
sender: octets => sender(new Uint8Array(octets)),
on_retract: () => reset(),
on_detect: detection => zmodemDetect(detection),
});
this.disposables.push(
terminal.onKey(e => {
const event = e.domEvent;
if (event.ctrlKey && event.key === 'c') {
if (this.denier) this.denier();
}
})
);
}
@bind
private zmodemDetect(detection: Zmodem.Detection): void {
const { terminal, receiveFile } = this;
terminal.options.disableStdin = true;
this.denier = () => detection.deny();
this.session = detection.confirm();
this.session.on('session_end', () => this.reset());
if (this.session.type === 'send') {
this.options.onSend();
} else {
receiveFile();
}
}
@bind
public sendFile(files: FileList) {
const { session, writeProgress } = this;
Zmodem.Browser.send_files(session, files, {
on_progress: (_, offer) => writeProgress(offer),
})
.then(() => session.close())
.catch(() => this.reset());
}
@bind
private receiveFile() {
const { session, writeProgress } = this;
session.on('offer', offer => {
offer.on('input', () => writeProgress(offer));
offer
.accept()
.then(payloads => {
const blob = new Blob(payloads, { type: 'application/octet-stream' });
saveAs(blob, offer.get_details().name);
})
.catch(() => this.reset());
});
session.start();
}
@bind
private writeProgress(offer: Zmodem.Offer) {
const { bytesHuman } = this;
const file = offer.get_details();
const name = file.name;
const size = file.size;
const offset = offer.get_offset();
const percent = ((100 * offset) / size).toFixed(2);
this.options.writer(`${name} ${percent}% ${bytesHuman(offset, 2)}/${bytesHuman(size, 2)}\r`);
}
// eslint-disable-next-line @typescript-eslint/no-explicit-any
private bytesHuman(bytes: any, precision: number): string {
if (!/^([-+])?|(\.\d+)(\d+(\.\d+)?|(\d+\.)|Infinity)$/.test(bytes)) {
return '-';
}
if (bytes === 0) return '0';
if (typeof precision === 'undefined') precision = 1;
const units = ['bytes', 'KB', 'MB', 'GB', 'TB', 'PB'];
const num = Math.floor(Math.log(bytes) / Math.log(1024));
const value = (bytes / Math.pow(1024, Math.floor(num))).toFixed(precision);
return `${value} ${units[num]}`;
}
}
|
