Adding integrated tile server

[simantics/district.git] / org.simantics.maps.server / node / node-v4.8.0-win-x64 / node_modules / npm / lib / cache / add-remote-tarball.js

diff --git a/org.simantics.maps.server/node/node-v4.8.0-win-x64/node_modules/npm/lib/cache/add-remote-tarball.js b/org.simantics.maps.server/node/node-v4.8.0-win-x64/node_modules/npm/lib/cache/add-remote-tarball.js
new file mode 100644 (file)
index 0000000..d04e9da
--- /dev/null
+++ b/org.simantics.maps.server/node/node-v4.8.0-win-x64/node_modules/npm/lib/cache/add-remote-tarball.js
@@ -0,0 +1,120 @@
+var mkdir = require("mkdirp")
+  , assert = require("assert")
+  , log = require("npmlog")
+  , path = require("path")
+  , sha = require("sha")
+  , retry = require("retry")
+  , writeStreamAtomic = require("fs-write-stream-atomic")
+  , PassThrough = require('readable-stream').PassThrough
+  , npm = require("../npm.js")
+  , inflight = require("inflight")
+  , addLocalTarball = require("./add-local-tarball.js")
+  , cacheFile = require("npm-cache-filename")
+
+module.exports = addRemoteTarball
+
+function addRemoteTarball (u, pkgData, shasum, auth, cb_) {
+  assert(typeof u === "string", "must have module URL")
+  assert(typeof cb_ === "function", "must have callback")
+
+  function cb (er, data) {
+    if (data) {
+      data._from = u
+      data._resolved = u
+      data._shasum = data._shasum || shasum
+    }
+    cb_(er, data)
+  }
+
+  cb_ = inflight(u, cb_)
+  if (!cb_) return log.verbose("addRemoteTarball", u, "already in flight; waiting")
+  log.verbose("addRemoteTarball", u, "not in flight; adding")
+
+  // XXX Fetch direct to cache location, store tarballs under
+  // ${cache}/registry.npmjs.org/pkg/-/pkg-1.2.3.tgz
+  var tmp = cacheFile(npm.tmp, u)
+
+  function next (er, resp, shasum) {
+    if (er) return cb(er)
+    addLocalTarball(tmp, pkgData, shasum, cb)
+  }
+
+  log.verbose("addRemoteTarball", [u, shasum])
+  mkdir(path.dirname(tmp), function (er) {
+    if (er) return cb(er)
+    addRemoteTarball_(u, tmp, shasum, auth, next)
+  })
+}
+
+function addRemoteTarball_ (u, tmp, shasum, auth, cb) {
+  // Tuned to spread 3 attempts over about a minute.
+  // See formula at <https://github.com/tim-kos/node-retry>.
+  var operation = retry.operation({
+    retries: npm.config.get("fetch-retries")
+  , factor: npm.config.get("fetch-retry-factor")
+  , minTimeout: npm.config.get("fetch-retry-mintimeout")
+  , maxTimeout: npm.config.get("fetch-retry-maxtimeout")
+  })
+
+  operation.attempt(function (currentAttempt) {
+    log.info("retry", "fetch attempt " + currentAttempt
+      + " at " + (new Date()).toLocaleTimeString())
+    fetchAndShaCheck(u, tmp, shasum, auth, function (er, response, shasum) {
+      // Only retry on 408, 5xx or no `response`.
+      var sc = response && response.statusCode
+      var statusRetry = !sc || (sc === 408 || sc >= 500)
+      if (er && statusRetry && operation.retry(er)) {
+        log.warn("retry", "will retry, error on last attempt: " + er)
+        return
+      }
+      cb(er, response, shasum)
+    })
+  })
+}
+
+function fetchAndShaCheck (u, tmp, shasum, auth, cb) {
+  npm.registry.fetch(u, { auth : auth }, function (er, response) {
+    if (er) {
+      log.error("fetch failed", u)
+      return cb(er, response)
+    }
+
+    var tarball = writeStreamAtomic(tmp, { mode: npm.modes.file })
+    tarball.on('error', function (er) {
+      cb(er)
+      tarball.destroy()
+    })
+
+    tarball.on("finish", function () {
+      if (!shasum) {
+        // Well, we weren't given a shasum, so at least sha what we have
+        // in case we want to compare it to something else later
+        return sha.get(tmp, function (er, shasum) {
+          log.silly("fetchAndShaCheck", "shasum", shasum)
+          cb(er, response, shasum)
+        })
+      }
+
+      // validate that the url we just downloaded matches the expected shasum.
+      log.silly("fetchAndShaCheck", "shasum", shasum)
+      sha.check(tmp, shasum, function (er) {
+        if (er && er.message) {
+          // add original filename for better debuggability
+          er.message = er.message + "\n" + "From:     " + u
+        }
+        return cb(er, response, shasum)
+      })
+    })
+
+    // 0.8 http streams have a bug, where if they're paused with data in
+    // their buffers when the socket closes, they call `end` before emptying
+    // those buffers, which results in the entire pipeline ending and thus
+    // the point that applied backpressure never being able to trigger a
+    // `resume`.
+    // We work around this by piping into a pass through stream that has
+    // unlimited buffering. The pass through stream is from readable-stream
+    // and is thus a current streams3 implementation that is free of these
+    // bugs even on 0.8.
+    response.pipe(PassThrough({highWaterMark: Infinity})).pipe(tarball)
+  })
+}