Make a JPMS-compatible JavaNetCookieJar (#8074)

* Make a JPMS-compatible JavaNetCookieJar

* Add missing imports

* Depend on okhttpUrlconnection

This is necessary to pass the OSGi test.

okhttp-java-net-cookiejar/src/main/kotlin/okhttp3/java/net/cookiejar/JavaNetCookieJar.kt

@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2015 Square, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+@file:Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")
+package okhttp3.java.net.cookiejar
+
+
+import java.io.IOException
+import java.net.CookieHandler
+import java.net.HttpCookie
+import java.util.Collections
+import okhttp3.Cookie
+import okhttp3.CookieJar
+import okhttp3.HttpUrl
+import okhttp3.internal.cookieToString
+import okhttp3.internal.delimiterOffset
+import okhttp3.internal.platform.Platform
+import okhttp3.internal.platform.Platform.Companion.WARN
+import okhttp3.internal.trimSubstring
+
+/** A cookie jar that delegates to a [java.net.CookieHandler]. */
+class JavaNetCookieJar(private val cookieHandler: CookieHandler) : CookieJar {
+
+  override fun saveFromResponse(url: HttpUrl, cookies: List<Cookie>) {
+    val cookieStrings = mutableListOf<String>()
+    for (cookie in cookies) {
+      cookieStrings.add(cookieToString(cookie, true))
+    }
+    val multimap = mapOf("Set-Cookie" to cookieStrings)
+    try {
+      cookieHandler.put(url.toUri(), multimap)
+    } catch (e: IOException) {
+      Platform.get().log("Saving cookies failed for " + url.resolve("/...")!!, WARN, e)
+    }
+  }
+
+  override fun loadForRequest(url: HttpUrl): List<Cookie> {
+    val cookieHeaders = try {
+      // The RI passes all headers. We don't have 'em, so we don't pass 'em!
+      cookieHandler.get(url.toUri(), emptyMap<String, List<String>>())
+    } catch (e: IOException) {
+      Platform.get().log("Loading cookies failed for " + url.resolve("/...")!!, WARN, e)
+      return emptyList()
+    }
+
+    var cookies: MutableList<Cookie>? = null
+    for ((key, value) in cookieHeaders) {
+      if (("Cookie".equals(key, ignoreCase = true) || "Cookie2".equals(key, ignoreCase = true)) &&
+          value.isNotEmpty()) {
+        for (header in value) {
+          if (cookies == null) cookies = mutableListOf()
+          cookies.addAll(decodeHeaderAsJavaNetCookies(url, header))
+        }
+      }
+    }
+
+    return if (cookies != null) {
+      Collections.unmodifiableList(cookies)
+    } else {
+      emptyList()
+    }
+  }
+
+  /**
+   * Convert a request header to OkHttp's cookies via [HttpCookie]. That extra step handles
+   * multiple cookies in a single request header, which [Cookie.parse] doesn't support.
+   */
+  private fun decodeHeaderAsJavaNetCookies(url: HttpUrl, header: String): List<Cookie> {
+    val result = mutableListOf<Cookie>()
+    var pos = 0
+    val limit = header.length
+    var pairEnd: Int
+    while (pos < limit) {
+      pairEnd = header.delimiterOffset(";,", pos, limit)
+      val equalsSign = header.delimiterOffset('=', pos, pairEnd)
+      val name = header.trimSubstring(pos, equalsSign)
+      if (name.startsWith("$")) {
+        pos = pairEnd + 1
+        continue
+      }
+
+      // We have either name=value or just a name.
+      var value = if (equalsSign < pairEnd) {
+        header.trimSubstring(equalsSign + 1, pairEnd)
+      } else {
+        ""
+      }
+
+      // If the value is "quoted", drop the quotes.
+      if (value.startsWith("\"") && value.endsWith("\"") && value.length >= 2) {
+        value = value.substring(1, value.length - 1)
+      }
+
+      result.add(Cookie.Builder()
+          .name(name)
+          .value(value)
+          .domain(url.host)
+          .build())
+      pos = pairEnd + 1
+    }
+    return result
+  }
+}