Add support for skipping token validation

src/main/kotlin/mdnet/server/ImageHandler.kt

@@ -174,7 +174,7 @@ class ImageServer(
 
     companion object {
         private val LOGGER = LoggerFactory.getLogger(ImageServer::class.java)
-        private fun String.isImageMimetype() = this.toLowerCase().startsWith("image/")
+        private fun String.isImageMimetype() = this.lowercase().startsWith("image/")
 
         private fun baseHandler(): Filter =
             CachingFilters.Response.MaxAge(Clock.systemUTC(), Constants.MAX_AGE_CACHE)

src/main/kotlin/mdnet/server/ImageServer.kt

@@ -108,8 +108,13 @@ fun getServer(
 
     val verifier = TokenVerifier(
         tokenKey = remoteSettings.tokenKey,
+        isDisabled = devSettings.disableTokenValidation,
     )
 
+    if (devSettings.disableTokenValidation) {
+        LOGGER.warn { "Token validation has been explicitly disabled. This should only be used for testing!" }
+    }
+
     return timeRequest()
         .then(addCommonHeaders(devSettings.sendServerHeader))
         .then(catchAllHideDetails())

src/main/kotlin/mdnet/server/TokenVerifier.kt

@@ -37,11 +37,16 @@ import org.slf4j.LoggerFactory
 import java.time.OffsetDateTime
 import java.util.Base64
 
-class TokenVerifier(tokenKey: ByteArray) : Filter {
+class TokenVerifier(tokenKey: ByteArray, isDisabled: Boolean) : Filter {
     private val box = TweetNaclFast.SecretBox(tokenKey)
+    private val isDisabled = isDisabled
 
     override fun invoke(next: HttpHandler): HttpHandler {
         return then@{
+            if (isDisabled) {
+                return@then next(it)
+            }
+
             val chapterHash = Path.of("chapterHash")(it)
 
             val cleanedUri = it.uri.path.replaceBefore("/data", "/{token}")

src/main/kotlin/mdnet/settings/ClientSettings.kt

@@ -50,6 +50,7 @@ data class DevSettings(
     val devUrl: String? = null,
     val disableSniCheck: Boolean = false,
     val sendServerHeader: Boolean = false,
+    val disableTokenValidation: Boolean = false,
 )
 
 @JsonNaming(PropertyNamingStrategies.SnakeCaseStrategy::class)

src/test/kotlin/mdnet/server/TokenVerifierTest.kt

@@ -31,7 +31,7 @@ class TokenVerifierTest : FreeSpec() {
         val clientKeys = TweetNaclFast.Box.keyPair()
         val box = TweetNaclFast.Box(clientKeys.publicKey, remoteKeys.secretKey)
 
-        val backend = TokenVerifier(box.before()).then {
+        val backend = TokenVerifier(box.before(), false).then {
             Response(Status.OK)
         }