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package.js
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package.js
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var fs = require('fs'),
url = require('url'),
path = require('path'),
http = require('http'),
https = require('https'),
semver = require('semver'),
Resource = require('./resource.js');
// configuration
var externalUrl, // external URL of npm_lazy
remoteUrl = 'http://registry.npmjs.org/', // "http://registry.npmjs.org/"
remoteIsHttps = (url.parse(remoteUrl).protocol == 'https:'),
rejectUnauthorized = true,
logger = console;
function Package() { }
Package.configure = function(opts) {
if (typeof opts.externalUrl !== 'undefined') {
externalUrl = opts.externalUrl;
}
if (typeof opts.remoteUrl !== 'undefined') {
remoteUrl = opts.remoteUrl;
remoteIsHttps = (url.parse(remoteUrl).protocol == 'https:');
}
if (typeof opts.rejectUnauthorized !== 'undefined') {
rejectUnauthorized = opts.rejectUnauthorized;
}
if (typeof opts.logger !== 'undefined') {
logger = opts.logger;
}
};
// uncached direct request
Package.proxy = function(req, res) {
// sadly, the simple req.pipe(http.request).pipe(res) type approach
// does not quite work, in particular the method and headers will be wrong
var parsed = url.parse(remoteUrl),
opts = {
host: parsed.host,
port: parsed.port,
path: req.url,
headers: req.headers,
method: req.method
};
opts.headers.host = parsed.host;
if (!rejectUnauthorized && parsed.protocol == 'https:') {
opts.rejectUnauthorized = false;
opts.agent = new https.Agent(opts);
}
logger.log('Querying the registry (not cached):', remoteUrl + req.url.substr(1));
var outgoing = (remoteIsHttps ? https : http).request(opts, function(pres) {
// write headers
Object.keys(pres.headers).forEach(function(key) {
res.setHeader(key, pres.headers[key]);
});
// write statuscode
res.writeHead(pres.statusCode);
// write response
pres.pipe(res);
});
req.pipe(outgoing).once('error', function(e) {
logger.log('Ignoring query error (not cached):', e);
res.statusCode = 500;
res.end('{}');
});
// logger.log(req.headers);
// req.pipe(process.stdout);
};
Package.getIndex = function(pname, onDone) {
// package index
var uri = remoteUrl + pname,
r = Resource.get(uri);
r.on('fetch-error', function(err, current, max) {
logger.log('Fetch failed (' + current + '/' + max + '): ' + uri, err);
});
r.on('fetch-cached', function() {
logger.log('[OK] Reusing cached result for ' + uri);
});
r.getReadablePath(function(err, data, etag) {
if (err) {
return onDone(err, data);
}
r.removeAllListeners('fetch-error');
r.removeAllListeners('fetch-cached');
return onDone(err, Package._rewriteLocation(JSON.parse(fs.readFileSync(data))), etag);
});
};
Package.getVersion = function(pname, version, onDone) {
// package index
var uri = remoteUrl + pname,
r = Resource.get(uri);
r.on('fetch-error', function() {
logger.log('Fetch failed: ' + uri);
});
r.on('fetch-cached', function() {
logger.log('[OK] Reusing cached result for ' + uri);
});
r.getReadablePath(function(err, fullpath, etag) {
if (err) {
return onDone(err);
}
r.removeAllListeners('fetch-error');
r.removeAllListeners('fetch-cached');
// according to the NPM source, the version specific JSON is
// directly from the index document (e.g. just take doc.versions[ver])
var doc = JSON.parse(fs.readFileSync(fullpath));
// from NPM: if not a valid version, then treat as a tag.
if (!(version in doc.versions) && (version in doc['dist-tags'])) {
version = doc['dist-tags'][version];
}
if (doc.versions[version]) {
return onDone(undefined, Package._rewriteLocation(doc.versions[version]), etag);
}
return onDone(new Error('[done] Could not find version', fullpath, version));
});
};
Package._rewriteLocation = function(meta) {
if (!meta) {
return meta;
}
if (meta.versions) {
// if a full index, apply to all versions
Object.keys(meta.versions).forEach(function(version) {
meta.versions[version] = Package._rewriteLocation(meta.versions[version]);
});
}
if (meta.dist && meta.dist.tarball) {
var parts = url.parse(meta.dist.tarball);
meta.dist.tarball = externalUrl + parts.pathname;
}
return meta;
};
module.exports = Package;