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Timeout for jsonp/xhr requests

This commit is contained in:
Alexandre Archambault 2015-06-18 17:52:13 +01:00
parent 8ca951d2c2
commit 43ccad0c4e
1 changed files with 32 additions and 19 deletions
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51
core-js/src/main/scala/coursier/core/Remote.scala
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@ -10,18 +10,32 @@ import scalaz.concurrent.Task
import scala.scalajs.js
import js.Dynamic.{global => g}
import scala.scalajs.js.timers._
object Remote {
def encodeURIComponent(s: String): String =
g.encodeURIComponent(s).asInstanceOf[String]
lazy val jsonpAvailable = js.isUndefined(g.jsonp)
lazy val jsonpAvailable = !js.isUndefined(g.jsonp)
/** Available if we're running on node, and package xhr2 is installed */
lazy val xhr = g.require("xhr2")
def xhrReq() =
js.Dynamic.newInstance(xhr)().asInstanceOf[XMLHttpRequest]
def fetchTimeout(target: String, p: Promise[_]) =
setTimeout(10000) {
if (!p.isCompleted) {
p.failure(new Exception(s"Timeout when fetching $target"))
}
}
def proxiedJsonp(url: String)(implicit executionContext: ExecutionContext): Future[String] =
if (url.contains("{")) Future.successful("") // jsonp callback never gets executed in this case (empty response)
else {
// FIXME url is put between quotes in the YQL query, which could sometimes require some extra encoding
// FIXME url is put between quotes in the YQL query, which should sometimes require some extra encoding
val url0 =
"https://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20xml%20where%20url%3D%22" +
encodeURIComponent(url) +
@ -31,7 +45,7 @@ object Remote {
// FIXME Promise may not be always completed in case of failure
g.jsonp(url0, (res: js.Dynamic) => {
g.jsonp(url0, (res: js.Dynamic) => if (!p.isCompleted) {
val success = !js.isUndefined(res) && !js.isUndefined(res.results)
if (success)
p.success(res.results.asInstanceOf[js.Array[String]].mkString("\n"))
@ -39,27 +53,26 @@ object Remote {
p.failure(new Exception(s"Fetching $url ($url0)"))
})
fetchTimeout(s"$url ($url0)", p)
p.future
}
def get(url: String)(implicit executionContext: ExecutionContext): Future[Either[String, Xml.Node]] =
if (jsonpAvailable) {
// Assume we're running on node, and that node package xhr2 is installed
val xhr = g.require("xhr2")
val p = Promise[Either[String, Xml.Node]]()
val req = js.Dynamic.newInstance(xhr)().asInstanceOf[XMLHttpRequest]
val f = { _: Event =>
p.success(compatibility.xmlParse(req.responseText))
}
req.onload = f
req.open("GET", url)
req.send()
p.future
} else {
if (jsonpAvailable)
proxiedJsonp(url).map(compatibility.xmlParse)
else {
val p = Promise[Either[String, Xml.Node]]()
val xhrReq0 = xhrReq()
val f = { _: Event =>
p.success(compatibility.xmlParse(xhrReq0.responseText))
}
xhrReq0.onload = f
xhrReq0.open("GET", url)
xhrReq0.send()
fetchTimeout(url, p)
p.future
}
}