* first action! (#1)

node_modules/npm-registry-fetch/check-response.js

@@ -0,0 +1,109 @@
+'use strict'
+
+const config = require('./config.js')
+const errors = require('./errors.js')
+const LRU = require('lru-cache')
+
+module.exports = checkResponse
+function checkResponse (method, res, registry, startTime, opts) {
+  opts = config(opts)
+  if (res.headers.has('npm-notice') && !res.headers.has('x-local-cache')) {
+    opts.log.notice('', res.headers.get('npm-notice'))
+  }
+  checkWarnings(res, registry, opts)
+  if (res.status >= 400) {
+    logRequest(method, res, startTime, opts)
+    return checkErrors(method, res, startTime, opts)
+  } else {
+    res.body.on('end', () => logRequest(method, res, startTime, opts))
+    if (opts.ignoreBody) {
+      res.body.resume()
+      res.body = null
+    }
+    return res
+  }
+}
+
+function logRequest (method, res, startTime, opts) {
+  const elapsedTime = Date.now() - startTime
+  const attempt = res.headers.get('x-fetch-attempts')
+  const attemptStr = attempt && attempt > 1 ? ` attempt #${attempt}` : ''
+  const cacheStr = res.headers.get('x-local-cache') ? ' (from cache)' : ''
+  opts.log.http(
+    'fetch',
+    `${method.toUpperCase()} ${res.status} ${res.url} ${elapsedTime}ms${attemptStr}${cacheStr}`
+  )
+}
+
+const WARNING_REGEXP = /^\s*(\d{3})\s+(\S+)\s+"(.*)"\s+"([^"]+)"/
+const BAD_HOSTS = new LRU({ max: 50 })
+
+function checkWarnings (res, registry, opts) {
+  if (res.headers.has('warning') && !BAD_HOSTS.has(registry)) {
+    const warnings = {}
+    res.headers.raw()['warning'].forEach(w => {
+      const match = w.match(WARNING_REGEXP)
+      if (match) {
+        warnings[match[1]] = {
+          code: match[1],
+          host: match[2],
+          message: match[3],
+          date: new Date(match[4])
+        }
+      }
+    })
+    BAD_HOSTS.set(registry, true)
+    if (warnings['199']) {
+      if (warnings['199'].message.match(/ENOTFOUND/)) {
+        opts.log.warn('registry', `Using stale data from ${registry} because the host is inaccessible -- are you offline?`)
+      } else {
+        opts.log.warn('registry', `Unexpected warning for ${registry}: ${warnings['199'].message}`)
+      }
+    }
+    if (warnings['111']) {
+      // 111 Revalidation failed -- we're using stale data
+      opts.log.warn(
+        'registry',
+        `Using stale data from ${registry} due to a request error during revalidation.`
+      )
+    }
+  }
+}
+
+function checkErrors (method, res, startTime, opts) {
+  return res.buffer()
+    .catch(() => null)
+    .then(body => {
+      let parsed = body
+      try {
+        parsed = JSON.parse(body.toString('utf8'))
+      } catch (e) {}
+      if (res.status === 401 && res.headers.get('www-authenticate')) {
+        const auth = res.headers.get('www-authenticate')
+          .split(/,\s*/)
+          .map(s => s.toLowerCase())
+        if (auth.indexOf('ipaddress') !== -1) {
+          throw new errors.HttpErrorAuthIPAddress(
+            method, res, parsed, opts.spec
+          )
+        } else if (auth.indexOf('otp') !== -1) {
+          throw new errors.HttpErrorAuthOTP(
+            method, res, parsed, opts.spec
+          )
+        } else {
+          throw new errors.HttpErrorAuthUnknown(
+            method, res, parsed, opts.spec
+          )
+        }
+      } else if (res.status === 401 && /one-time pass/.test(body.toString('utf8'))) {
+        // Heuristic for malformed OTP responses that don't include the www-authenticate header.
+        throw new errors.HttpErrorAuthOTP(
+          method, res, parsed, opts.spec
+        )
+      } else {
+        throw new errors.HttpErrorGeneral(
+          method, res, parsed, opts.spec
+        )
+      }
+    })
+}