Some common functions akka#3253

azure-storage/src/main/scala/akka/stream/alpakka/azure/storage/package.scala

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) since 2016 Lightbend Inc. <https://www.lightbend.com>
+ */
+
+package akka.stream.alpakka
+package azure
+
+import java.time.{ZoneOffset, ZonedDateTime}
+import java.time.format.DateTimeFormatter
+
+package object storage {
+
+  private[storage] val NewLine: String = "\n"
+  private[storage] val AuthorizationHeaderKey = "Authorization"
+  private[storage] val XmsDateHeaderKey = "x-ms-date"
+  private[storage] val XmsVersionHeaderKey = "x-ms-version"
+  private[storage] val BlobTypeHeaderKey = "x-ms-blob-type"
+  private[storage] val LeaseIdHeaderKey = "x-ms-lease-id"
+  private[storage] val FileWriteTypeHeaderKey = "x-ms-write"
+  private[storage] val XMsContentLengthHeaderKey = "x-ms-content-length"
+  private[storage] val FileTypeHeaderKey = "x-ms-type"
+  private[storage] val BlobType = "blob"
+  private[storage] val FileType = "file"
+
+  private[storage] def getFormattedDate: String =
+    DateTimeFormatter.RFC_1123_DATE_TIME.format(ZonedDateTime.now(ZoneOffset.UTC))
+
+  /** Removes ETag quotes in the same way the official AWS tooling does. See
+   */
+  private[storage] def removeQuotes(string: String): String = {
+    val trimmed = string.trim()
+    val tail = if (trimmed.startsWith("\"")) trimmed.drop(1) else trimmed
+    if (tail.endsWith("\"")) tail.dropRight(1) else tail
+  }
+
+  /** This method returns `None` if given an empty `String`. This is typically used when parsing XML since its common to
+   * have XML elements with an empty text value inside.
+   */
+  private[storage] def emptyStringToOption(value: String): Option[String] = if (value == "") None else Some(value)
+}