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package main
import (
"encoding/json"
"expvar"
"fmt"
"net/http"
)
func indexHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/html; charset=utf-8")
w.Header().Set("Cache-Control", "no-cache")
w.WriteHeader(200)
w.Write(html)
}
func statsHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json; charset=utf-8")
w.Header().Set("Cache-Control", "public")
w.WriteHeader(200)
fmt.Fprintf(w, "{")
first := true
expvar.Do(func(kv expvar.KeyValue) {
if kv.Key == "cmdline" || kv.Key == "memstats" {
return
}
if !first {
fmt.Fprintf(w, ",")
}
first = false
fmt.Fprintf(w, "%q: %s", kv.Key, kv.Value)
})
fmt.Fprintf(w, "}")
}
func searchHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json; charset=utf-8")
w.Header().Set("Cache-Control", "no-cache")
if q := r.URL.Query().Get("q"); q != "" {
torrents, err := torrentsByName(q)
if err != nil {
w.WriteHeader(500)
fmt.Printf("Error: %q\n", err)
return
}
w.WriteHeader(200)
json.NewEncoder(w).Encode(torrents)
return
}
if tag := r.URL.Query().Get("tag"); tag != "" {
torrents, err := torrentsByTag(tag)
if err != nil {
w.WriteHeader(500)
fmt.Printf("Error: %q\n", err)
return
}
w.WriteHeader(200)
json.NewEncoder(w).Encode(torrents)
return
}
w.WriteHeader(406)
json.NewEncoder(w).Encode("Query required")
}
var html = []byte(`
<!doctype html>
<html>
<head>
<title>DHT search</title>
<meta charset="UTF-8">
<style>
body { padding:0;margin:0;color:#666;line-height:1.5;font-size:16px; }
.header { padding:1em;border-bottom:1px solid #555; }
input { padding:2px; }
.page { padding:1em 2em; }
ul { list-style:none;padding:0;margin:0; }
.torrent { margin-bottom:1em; }
.torrent__name { display:block; }
.torrent__magnet { display:block; }
.torrent__size, .torrent__file-count, .torrent__seen, .torrent__tags { padding-right:1em; }
.tag { display:inline;text-decoration:none; }
.files { padding-left:2em;font-family:monospace;font-size:.75em; }
.files { display:none; }
.files--active { display:block; }
.file__size { margin-left:.5em;font-size:.875em; }
.stats { display:block;margin:0;margin-top:1em; }
.stats__key, .stats__value { display:inline-block;font-size:.75em;padding:0;margin:0; }
.stats__key { margin-right:.25em;color:#222; }
.stats__key:after { content:':'; }
.stats__value { margin-right:.5em;color:#888; }
</style>
</head>
<body id="body">
<div class="header">
<input id="search" type="text" name="search" placeholder="Search" />
<button id="go">Go</button>
<dl id="stats" class="stats"></dl>
</div>
<div id="page" class="page">
</div>
<script>
var humanSize = function (bytes) {
if (bytes === 0) {
return '0 Bytes'
}
var sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB']
var sizeIndex = parseInt(Math.floor(Math.log(bytes) / Math.log(1024)), 10)
if (sizeIndex >= sizes.length) {
sizeIndex = sizes.length - 1
}
return (bytes / Math.pow(1024, sizeIndex)).toFixed(0) + sizes[sizeIndex]
}
var processResponse = function (resp) {
if (resp.status === 200 || resp.status === 0) {
return resp.json()
} else {
return new Error(resp.statusText)
}
}
var search = function (term) {
var oldButton = bEl.innerHTML
bEl.innerHTML = 'Searching'
var query = ''
var tIdx = term.indexOf('tag:')
if (tIdx >= 0) {
query = 'tag=' + term.slice(tIdx+4).trim()
} else {
query = 'q=' + term.trim()
}
fetch('/search?' + query)
.then(processResponse)
.then(function (data) {
var pre = [
'<p>Displaying ', data.length, ' torrents.</p>',
'<ul id="results">'
].join('')
var torrents = data.map(function (t) {
var magnet = 'magnet:?xt=urn:btih:' + t.infohash
var pre = [
'<li class="torrent">',
'<a class="torrent__name" href="', magnet, '">', t.name, '</a>',
'<span class="torrent__magnet">', magnet, '</span>',
'<span class="torrent__size">Size: ', humanSize(t.size), '</span>',
'<span class="torrent__seen">Last seen: <time datetime="', t.seen, '">', new Date(t.seen).toLocaleString(), '</time></span>'
].join('')
var tags = ''
if (t.tags.length) {
tags = [
'<span class="torrent__tags">Tags: ',
t.tags.map(function (g) { return '<a class="tag" href="/tags/' + g + '">' + g + '</a>' }).join(', '),
'</span>'
].join('')
}
var files = ''
if (t.files.length) {
var fHtml = t.files.map(function (f) {
return [
'<li class="files__file file">',
'<span class="file__path">', f.path, '</span>',
'<span class="file__size">[', humanSize(f.size), ']</span>',
'</li>'
].join('')
})
files = [
'<span class="torrent__file-count">Files: ', t.files.length, '</span>',
'<a class="toggler" href="#">toggle files</a><ul class="files">',
fHtml.join(''),
'</ul>'].join('')
}
var post = [
'</li>'
].join('')
return pre + tags + files + post
}).join('')
var post = '</ul>'
bEl.innerHTML = oldButton
pEl.innerHTML = pre + torrents + post
var togglers = document.getElementsByClassName('toggler')
for (var i = 0; i < togglers.length; i += 1) {
var el = togglers[i]
el.addEventListener('click', function (e) {
e.preventDefault()
e.target.nextElementSibling.classList.toggle('files--active')
})
}
})
}
var pEl = document.getElementById('page')
var sEl = document.getElementById('search')
var bEl = document.getElementById('go')
bEl.addEventListener('click', function () {
var term = sEl.value
if (term.length > 2) {
console.log('Search term: ', term)
search(term)
}
})
sEl.addEventListener('keyup', function (e) {
if (e.keyCode === 13) {
bEl.click()
}
})
var statsEl = document.getElementById('stats')
var getStats = function () {
fetch('/stats')
.then(processResponse)
.then(function (data) {
statsEl.innerHTML = Object.keys(data).map(function (k) {
return [
'<dt class="stats__key">',
k.replace(/_/g,' '),
'</dt><dd class="stats__value">',
k.indexOf('bytes') === -1 ? data[k] : humanSize(data[k]),
'</dd>'
].join('')
}).join('')
setTimeout(getStats, 5000)
})
}
getStats()
</script>
</body>
</html>
`)
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