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radisk: md5 hash file names > 255 characters #1072

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radisk: md5 hash file names > 255 characters #1072

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18 changes: 17 additions & 1 deletion lib/radisk.js
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Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,23 @@
opt.jsonify = true;


function ename(t){ return encodeURIComponent(t).replace(/\*/g, '%2A') }
var crypto, enamemap;
try { // try requiring crypto, should only succeed on node
crypto = require("crypto");
enamemap = new Map(); // keep an in-memory map of known hashes
opt.maxKeyLength = opt.maxKeyLength < 0 ? opt.maxKeyLength : opt.maxKeyLength || 255; // feature can be disabled by setting opt.maxKeyLength <= 32
} catch (e) { delete opt.maxKeyLength }
function ename(t) {
var s = encodeURIComponent(t).replace(/\*/g, '%2A');
if (crypto && opt.maxKeyLength > 32 && s.length > opt.maxKeyLength) {
if (!enamemap.has(s)) {
enamemap.set(s, crypto.createHash('md5').update(s).digest('hex'));
// TODO evict old map entries, or add this entry to %1C
}
return enamemap.get(s);
}
return s;
}
function atomic(v){ return u !== v && (!v || 'object' != typeof v) }
var timediate = (typeof setImmediate === "undefined")? setTimeout : setImmediate;
var puff = setTimeout.puff || timediate;
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