From cfbb8d48a22bd8c905b5e247c52a949d73c363be Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Wed, 1 Sep 2021 21:14:35 +0100
Subject: FIX: index file can be a CGI and should be executed

---
 server/src/net/usebox/gemini/server/Response.scala |  2 +
 server/src/net/usebox/gemini/server/Server.scala   | 10 +++--
 server/test/src/ServerSpec.scala                   | 50 ++++++++++++++++++++++
 3 files changed, 59 insertions(+), 3 deletions(-)

(limited to 'server')

diff --git a/server/src/net/usebox/gemini/server/Response.scala b/server/src/net/usebox/gemini/server/Response.scala
index edb6cdc..1c2071f 100644
--- a/server/src/net/usebox/gemini/server/Response.scala
+++ b/server/src/net/usebox/gemini/server/Response.scala
@@ -115,6 +115,8 @@ case class Cgi(
     "REMOTE_HOST" -> remoteAddr
   ).toSeq
 
+  logger.debug(s"CGI env: $env")
+
   val (status: Int, meta: String, body: String) = {
     val output = new java.io.ByteArrayOutputStream
     Try {
diff --git a/server/src/net/usebox/gemini/server/Server.scala b/server/src/net/usebox/gemini/server/Server.scala
index f402191..a14d829 100644
--- a/server/src/net/usebox/gemini/server/Server.scala
+++ b/server/src/net/usebox/gemini/server/Server.scala
@@ -104,12 +104,16 @@ case class Server(conf: ServiceConf) {
               .getDefault()
               .getPath(root, path)
               .normalize()
-            val cgi = vhost.getCgi(resource)
+            val cgi = vhost
+              .getCgi(resource) match {
+              case None => vhost.getCgi(resource.resolve(vhost.indexFile))
+              case cgi  => cgi
+            }
 
             logger.debug(s"requesting: '$resource', cgi is '$cgi'")
 
             resource.toFile() match {
-              case file
+              case _
                   if cgi
                     .map(_.toFile())
                     .map(f => f.isFile() && f.canExecute())
@@ -120,7 +124,7 @@ case class Server(conf: ServiceConf) {
                 val queryString =
                   if (uri.getQuery() == null) "" else uri.getQuery()
                 val pathInfo =
-                  if (cgiFile.compareTo(resource) == 0) ""
+                  if (cgiFile.compareTo(resource) >= 0) ""
                   else
                     "/" + resource
                       .subpath(
diff --git a/server/test/src/ServerSpec.scala b/server/test/src/ServerSpec.scala
index d3027e3..ea40798 100644
--- a/server/test/src/ServerSpec.scala
+++ b/server/test/src/ServerSpec.scala
@@ -621,6 +621,46 @@ class ServerSpec extends AnyFlatSpec with Matchers {
     cgi.body should include("env1=value")
   }
 
+  it should "execute a CGI when it is the index document" in {
+    val cgi = Server(TestData.cgiIndexConf)
+      .handleReq(
+        "gemini://localhost/dir/",
+        "127.0.0.1"
+      )
+      .asInstanceOf[Cgi]
+
+    cgi.status should be(20)
+    cgi.meta should be("text/gemini")
+    cgi.body should include("GATEWAY_INTERFACE=CGI/1.1")
+  }
+
+  it should "execute a CGI when it is the index document (full name)" in {
+    val cgi = Server(TestData.cgiIndexConf)
+      .handleReq(
+        "gemini://localhost/dir/cgi",
+        "127.0.0.1"
+      )
+      .asInstanceOf[Cgi]
+
+    cgi.status should be(20)
+    cgi.meta should be("text/gemini")
+    cgi.body should include("GATEWAY_INTERFACE=CGI/1.1")
+  }
+
+  it should "execute a CGI when it is the index document (full name, path info)" in {
+    val cgi = Server(TestData.cgiIndexConf)
+      .handleReq(
+        "gemini://localhost/dir/cgi/path/info",
+        "127.0.0.1"
+      )
+      .asInstanceOf[Cgi]
+
+    cgi.status should be(20)
+    cgi.meta should be("text/gemini")
+    cgi.body should include("GATEWAY_INTERFACE=CGI/1.1")
+    cgi.body should include("PATH_INFO=/path/info")
+  }
+
   object TestData {
 
     val host = "localhost"
@@ -672,6 +712,16 @@ class ServerSpec extends AnyFlatSpec with Matchers {
       )
     )
 
+    val cgiIndexConf = cgiConf.copy(virtualHosts =
+      List(
+        cgiConf
+          .virtualHosts(0)
+          .copy(
+            indexFile = "cgi"
+          )
+      )
+    )
+
     val confUserDir = conf.copy(virtualHosts =
       List(
         conf
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