Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/853#discussion_r12999133
--- Diff: core/src/main/scala/org/apache/spark/util/Utils.scala ---
@@ -1166,4 +1166,42 @@ private[spark] object Utils extends Logging {
true
}
}
+
+ /**
+ * Return a well-formed URI for the file described by a user input
string.
+ *
+ * If the supplied path does not contain a scheme, or is a relative
path, it will be
+ * converted into an absolute path with a file:// scheme.
+ */
+ def resolveURI(path: String, testWindows: Boolean = false): URI = {
+
+ val windows = isWindows || testWindows
+ // In Windows, the file separator is a backslash, but this is
inconsistent with the URI format
+ val formattedPath = if (windows) path.replace("\\", "/") else path
+ // Each Windows drive contains only a single alphabet character
+ val windowsDrive = "([a-zA-Z])".r
+
+ val uri = new URI(formattedPath)
+ uri.getScheme match {
+ case windowsDrive(d) if windows =>
+ new URI("file:/" + uri.toString.stripPrefix("/"))
--- End diff --
I am a little confused with this. This function will convert window's path
like `c:\hello\world.txt` to `file:/c:/hello/world.txt` . So the backslashes
get permanently replaced by front slashes. How does resolving paths in window
work after that?
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