From dfd878753475a8c8100be15d740eaacc78ed76f9 Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Sun, 28 Feb 2021 15:16:46 +0000
Subject: User directories support

---
 server/src/net/usebox/gemini/server/Server.scala   |  6 +++--
 .../src/net/usebox/gemini/server/ServiceConf.scala | 30 +++++++++++++++++++++-
 2 files changed, 33 insertions(+), 3 deletions(-)

(limited to 'server/src')

diff --git a/server/src/net/usebox/gemini/server/Server.scala b/server/src/net/usebox/gemini/server/Server.scala
index 2e9bb6b..d6bcb8a 100644
--- a/server/src/net/usebox/gemini/server/Server.scala
+++ b/server/src/net/usebox/gemini/server/Server.scala
@@ -100,10 +100,12 @@ case class Server(conf: ServiceConf) {
           case ("gemini", _, _, _) if uri.normalize() != uri =>
             logger.debug("redirect to normalize uri")
             PermanentRedirect(req, uri.normalize().toString())
-          case ("gemini", host, path, Some(vhost)) =>
+          case ("gemini", host, rawPath, Some(vhost)) =>
+            val (root, path) = vhost.getRoot(rawPath)
+
             val resource = FileSystems
               .getDefault()
-              .getPath(vhost.root, path)
+              .getPath(root, path)
               .normalize()
 
             logger.debug(s"requesting: '$resource'")
diff --git a/server/src/net/usebox/gemini/server/ServiceConf.scala b/server/src/net/usebox/gemini/server/ServiceConf.scala
index e90d6a8..74ed548 100644
--- a/server/src/net/usebox/gemini/server/ServiceConf.scala
+++ b/server/src/net/usebox/gemini/server/ServiceConf.scala
@@ -20,10 +20,16 @@ case class VirtualHost(
     indexFile: String = "index.gmi",
     directoryListing: Boolean = true,
     geminiParams: Option[String] = None,
-    directories: List[Directory] = Nil
+    directories: List[Directory] = Nil,
+    userDirectories: Boolean = false,
+    userDirectoryPath: Option[String] = None
 )
 
 object VirtualHost {
+
+  val userTag = "{user}"
+  val userRe = raw"/~([a-z_][a-z0-9_-]*)(/{1}.*)?".r
+
   implicit class VirtualHostOps(vhost: VirtualHost) {
     def getDirectoryListing(path: Path): Boolean =
       vhost.directories
@@ -31,6 +37,18 @@ object VirtualHost {
         .fold(vhost.directoryListing)(loc =>
           loc.directoryListing.getOrElse(vhost.directoryListing)
         )
+
+    def getRoot(path: String): (String, String) =
+      path match {
+        case userRe(user, null)
+            if vhost.userDirectories && vhost.userDirectoryPath.nonEmpty =>
+          // username with no end slash, force redirect
+          (vhost.userDirectoryPath.get.replace(userTag, user), ".")
+        case userRe(user, userPath)
+            if vhost.userDirectories && vhost.userDirectoryPath.nonEmpty =>
+          (vhost.userDirectoryPath.get.replace(userTag, user), userPath)
+        case _ => (vhost.root, path)
+      }
   }
 }
 
@@ -55,9 +73,19 @@ object ServiceConf {
   implicit val virtualHostReader = deriveReader[VirtualHost]
   implicit val serviceConfReader = deriveReader[ServiceConf]
 
+  import VirtualHost.userTag
+
   def load(confFile: String) =
     ConfigSource.file(confFile).load[ServiceConf].map { conf =>
       conf.copy(virtualHosts = conf.virtualHosts.map { vhost =>
+        if (
+          vhost.userDirectories && !vhost.userDirectoryPath
+            .fold(false)(dir => dir.contains(userTag))
+        )
+          logger.warn(
+            s"In virtual host '${vhost.host}': user-directories is enabled but $userTag not found in user-directory-path"
+          )
+
         vhost.copy(directories = vhost.directories.map { dir =>
           val path =
             FileSystems
-- 
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