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
|
const { spawn } = require('child_process');
const fs = require('fs');
const config = require("../../config.js");
/*
* Gets the local latest zblock AKA zlatest
*
* Returns:
* - JSON object
* { zlatest: "Qm..." }
*
*/
function replyIfOkay(key, res)
{
const program = "ak-ns";
const command = spawn(program, ["-rj", key]);
var buffer = "";
command.stdout.on("data", data => {
buffer += data;
});
command.stderr.on("data", data => {
console.log(`stderr: ${data}`);
});
command.on('error', (error) => {
console.log(`error: ${error.message}`);
});
command.on("close", code => {
console.log(`child process ${program} exited with code ${code}`);
if (code === 0){
buffer = buffer.trim()
res.writeHead(200, {'Content-Type': 'application/json'});
res.end(`${buffer}`);
} else {
res.writeHead(404, {'Content-Type': 'application/json'});
res.end({"error":"unreachable"});
}
});
}
function getAKNSKey(req, res)
{
var args = req.url.split("/");
var key = args[3];
regex= /[a-fA-F0-9]{40}/
if (regex.test(key))
{
key = key.toUpperCase();
var path = config.akNSDir+"/"+key;
try
{
if(fs.existsSync(path))
{
replyIfOkay(key, res)
}
else
{
res.writeHead(404, {'Content-Type': 'application/json'});
res.end(JSON.stringify({"error":"not found"}));
}
}
catch (error)
{
res.writeHead(404, {'Content-Type': 'application/json'});
res.end(JSON.stringify({"error":error.message}));
}
}
else
{
res.writeHead(404, {'Content-Type': 'application/json'});
res.end(JSON.stringify({error:"No hash"}));
}
}
module.exports = getAKNSKey;
|
