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module.exports = regRequest
var url = require("url")
, zlib = require("zlib")
, rm = require("rimraf")
, asyncMap = require("slide").asyncMap
, Stream = require("stream").Stream
, request = require("request")
, retry = require("retry")
, crypto = require("crypto")
, pkg = require("../package.json")
function regRequest (method, where, what, etag, nofollow, cb_) {
if (typeof cb_ !== "function") cb_ = nofollow, nofollow = false
if (typeof cb_ !== "function") cb_ = etag, etag = null
if (typeof cb_ !== "function") cb_ = what, what = null
if (!this.sessionToken) {
this.sessionToken = crypto.randomBytes(8).toString("hex")
}
var registry = this.conf.get('registry')
if (!registry) return cb(new Error(
"No registry url provided: " + method + " " + where))
// Since there are multiple places where an error could occur,
// don't let the cb be called more than once.
var errState = null
function cb (er) {
if (errState) return
if (er) errState = er
cb_.apply(null, arguments)
}
if (where.match(/^\/?favicon.ico/)) {
return cb(new Error("favicon.ico isn't a package, it's a picture."))
}
var adduserChange = /^\/?-\/user\/org\.couchdb\.user:([^\/]+)\/-rev/
, adduserNew = /^\/?-\/user\/org\.couchdb\.user:([^\/]+)/
, nu = where.match(adduserNew)
, uc = where.match(adduserChange)
, alwaysAuth = this.conf.get('always-auth')
, isDel = method === "DELETE"
, isWrite = what || isDel
, authRequired = (alwaysAuth || isWrite) && !nu || uc || isDel
// resolve to a full url on the registry
if (!where.match(/^https?:\/\//)) {
this.log.verbose("url raw", where)
var q = where.split("?")
where = q.shift()
q = q.join("?")
if (where.charAt(0) !== "/") where = "/" + where
where = "." + where.split("/").map(function (p) {
p = p.trim()
if (p.match(/^org.couchdb.user/)) {
return p.replace(/\//g, encodeURIComponent("/"))
}
return encodeURIComponent(p)
}).join("/")
if (q) where += "?" + q
this.log.verbose("url resolving", [registry, where])
where = url.resolve(registry, where)
this.log.verbose("url resolved", where)
}
var remote = url.parse(where)
, auth = this.conf.get('_auth')
if (authRequired && !auth) {
var un = this.conf.get('username')
var pw = this.conf.get('_password')
if (un && pw)
auth = new Buffer(un + ':' + pw).toString('base64')
}
if (authRequired && !auth) {
return cb(new Error(
"This request requires auth credentials. Run `npm login` and repeat the request."))
}
if (auth && authRequired) {
remote.auth = new Buffer(auth, "base64").toString("utf8")
}
// Tuned to spread 3 attempts over about a minute.
// See formula at <https://github.com/tim-kos/node-retry>.
var operation = retry.operation({
retries: this.conf.get('fetch-retries') || 2,
factor: this.conf.get('fetch-retry-factor'),
minTimeout: this.conf.get('fetch-retry-mintimeout') || 10000,
maxTimeout: this.conf.get('fetch-retry-maxtimeout') || 60000
})
var self = this
operation.attempt(function (currentAttempt) {
self.log.info("trying", "registry request attempt " + currentAttempt
+ " at " + (new Date()).toLocaleTimeString())
makeRequest.call(self, method, remote, where, what, etag, nofollow
, function (er, parsed, raw, response) {
if (!er || (er.message && er.message.match(/^SSL Error/))) {
if (er)
er.code = 'ESSL'
return cb(er, parsed, raw, response)
}
// Only retry on 408, 5xx or no `response`.
var statusCode = response && response.statusCode
var timeout = statusCode === 408
var serverError = statusCode >= 500
var statusRetry = !statusCode || timeout || serverError
if (er && statusRetry && operation.retry(er)) {
self.log.info("retry", "will retry, error on last attempt: " + er)
return
}
if (response)
this.log.verbose("headers", response.headers)
cb.apply(null, arguments)
}.bind(this))
}.bind(this))
}
function makeRequest (method, remote, where, what, etag, nofollow, cb_) {
var cbCalled = false
function cb () {
if (cbCalled) return
cbCalled = true
cb_.apply(null, arguments)
}
var strict = this.conf.get('strict-ssl')
if (strict === undefined) strict = true
var opts = { url: remote
, method: method
, encoding: null // tell request let body be Buffer instance
, ca: this.conf.get('ca')
, localAddress: this.conf.get('local-address')
, cert: this.conf.get('cert')
, key: this.conf.get('key')
, strictSSL: strict }
, headers = opts.headers = {}
if (etag) {
this.log.verbose("etag", etag)
headers[method === "GET" ? "if-none-match" : "if-match"] = etag
}
headers['npm-session'] = this.sessionToken
headers.version = this.version || pkg.version
if (this.refer) {
headers.referer = this.refer
}
headers.accept = "application/json"
headers['accept-encoding'] = 'gzip'
headers["user-agent"] = this.conf.get('user-agent') ||
'node/' + process.version
var p = this.conf.get('proxy')
var sp = this.conf.get('https-proxy') || p
opts.proxy = remote.protocol === "https:" ? sp : p
// figure out wth 'what' is
if (what) {
if (Buffer.isBuffer(what) || typeof what === "string") {
opts.body = what
headers["content-type"] = "application/json"
headers["content-length"] = Buffer.byteLength(what)
} else if (what instanceof Stream) {
headers["content-type"] = "application/octet-stream"
if (what.size) headers["content-length"] = what.size
} else {
delete what._etag
opts.json = what
}
}
if (nofollow) {
opts.followRedirect = false
}
this.log.http(method, remote.href || "/")
var done = requestDone.call(this, method, where, cb)
var req = request(opts, decodeResponseBody(done))
req.on("error", cb)
req.on("socket", function (s) {
s.on("error", cb)
})
if (what && (what instanceof Stream)) {
what.pipe(req)
}
}
function decodeResponseBody(cb) {
return function (er, response, data) {
if (er) return cb(er, response, data)
// don't ever re-use connections that had server errors.
// those sockets connect to the Bad Place!
if (response.socket && response.statusCode > 500) {
response.socket.destroy()
}
if (response.headers['content-encoding'] !== 'gzip') return cb(er, response, data)
zlib.gunzip(data, function (er, buf) {
if (er) return cb(er, response, data)
cb(null, response, buf)
})
}
}
// cb(er, parsed, raw, response)
function requestDone (method, where, cb) {
return function (er, response, data) {
if (er) return cb(er)
var urlObj = url.parse(where)
if (urlObj.auth)
urlObj.auth = '***'
this.log.http(response.statusCode, url.format(urlObj))
var parsed
if (Buffer.isBuffer(data)) {
data = data.toString()
}
if (data && typeof data === "string" && response.statusCode !== 304) {
try {
parsed = JSON.parse(data)
} catch (ex) {
ex.message += "\n" + data
this.log.verbose("bad json", data)
this.log.error("registry", "error parsing json")
return cb(ex, null, data, response)
}
} else if (data) {
parsed = data
data = JSON.stringify(parsed)
}
// expect data with any error codes
if (!data && response.statusCode >= 400) {
return cb( response.statusCode + " "
+ require("http").STATUS_CODES[response.statusCode]
, null, data, response )
}
er = null
if (parsed && response.headers.etag) {
parsed._etag = response.headers.etag
}
if (parsed && parsed.error && response.statusCode >= 400) {
var w = url.parse(where).pathname.substr(1)
var name
if (!w.match(/^-/) && parsed.error === "not_found") {
w = w.split("/")
name = w[w.indexOf("_rewrite") + 1]
er = new Error("404 Not Found: "+name)
er.code = "E404"
er.pkgid = name
} else {
er = new Error(
parsed.error + " " + (parsed.reason || "") + ": " + w)
}
} else if (method !== "HEAD" && method !== "GET") {
// invalidate cache
// This is irrelevant for commands that do etag caching, but
// ls and view also have a timed cache, so this keeps the user
// from thinking that it didn't work when it did.
// Note that failure is an acceptable option here, since the
// only result will be a stale cache for some helper commands.
rm(this.cacheFile(where), function() {})
}
return cb(er, parsed, data, response)
}.bind(this)
}
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