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index.js
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index.js
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var os = require('os')
var request = require('request')
var hostsFound = 0
module.exports = function (options) {
var limit = options.limit || 1
var port = options.port || 80
var path = options.path || '/'
var signature = options.signature || ''
var scanInterval = options.scanInterval || 10
var requestTimeout = options.requestTimeout || 10
var foundCallback = options.found
var notFoundCallback = options.notFound
var scanCompleteCallback = options.scanComplete
var startIp = options.startIp
var startIpArray = startIp ? startIp.split('.') : null
var endIp = options.endIp
var endIpArray = endIp ? endIp.split('.') : null
// currently supports only Class C networks
var localIPadd = os.networkInterfaces().en1[1].address
var ipArray = localIPadd.split('.')
ipArray[2] = startIpArray ? +startIpArray[2] : 0
ipArray[3] = startIpArray ? +startIpArray[3] : 0
var maxNum2 = endIpArray ? +endIpArray[2] : 255
var maxNum3 = endIpArray ? +endIpArray[3] : 255
var timer = setInterval(function () {
if (limit === hostsFound) {
clearInterval(timer)
return scanCompleteCallback && scanCompleteCallback()
}
var ip = ipArray.join('.')
scan(requestTimeout, limit, ip, port, path, signature, foundCallback, notFoundCallback, scanCompleteCallback)
if (ipArray[2] === maxNum2 && ipArray[3] === maxNum3) {
clearInterval(timer)
return scanCompleteCallback && scanCompleteCallback()
}
if (ipArray[3] === 255) {
ipArray[2]++
ipArray[3] = 0
} else {
ipArray[3]++
}
}, scanInterval)
}
function scan(requestTimeout, limit, ip, port, path, signature, foundCallback, notFoundCallback, scanCompleteCallback) {
var url = 'http://' + ip + ':' + port + path
var options = {
url: url,
timeout: requestTimeout
}
request(options, function (error, response, body) {
if (!error && response.statusCode == 200) {
if (Array.isArray(signature)) {
signature.forEach(function(sigStr) {
if (body.indexOf(sigStr) === 0) {
hostsFound++
return foundCallback && foundCallback(ip)
}
})
} else if (body.indexOf(signature) === 0) {
hostsFound++
return foundCallback && foundCallback(ip)
}
} else {
return notFoundCallback && notFoundCallback(ip)
}
})
}