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Merge branch 'master' into 'master'

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Fix referrer check

See merge request mangadex-pub/mangadex_at_home!53
This commit is contained in:
lflare 2020-07-05 20:30:17 +00:00
parent 01b9e6adab a20c759700
commit 7fde2b5e53
1 changed files with 21 additions and 4 deletions
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25
src/main/kotlin/mdnet/base/server/ImageServer.kt
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@ -88,6 +88,11 @@ class ImageServer(
"/data"
} + "/$chapterHash/$fileName"
if (!request.referrerMatches(ALLOWED_REFERER_DOMAINS)) {
LOGGER.info { "Request for $sanitizedUri rejected due to non-allowed referrer ${request.header("Referer")}" }
return@then Response(Status.FORBIDDEN)
}
if (tokenized || serverSettings.forceTokens) {
val tokenArr = Base64.getUrlDecoder().decode(Path.of("token")(request))
val token = try {
@ -135,10 +140,7 @@ class ImageServer(
}
}
if (request.header("Referer")?.startsWith("https://mangadex.org") == false) {
snapshot?.close()
Response(Status.FORBIDDEN)
} else if (snapshot != null && imageDatum != null) {
if (snapshot != null && imageDatum != null) {
request.handleCacheHit(sanitizedUri, getRc4(rc4Bytes), snapshot, imageDatum)
} else {
if (snapshot != null) {
@ -152,6 +154,20 @@ class ImageServer(
}
}
/**
* Filters referrers based on passed (sub)domains. Ignores `scheme` (protocol) in URL
*/
private fun Request.referrerMatches(allowedDomains: List<String>, permitBlank: Boolean = true): Boolean {
val referer = this.header("Referer") ?: return permitBlank // Referrer was misspelled as "Referer" and now we're stuck with it -_-
if (referer == "") return permitBlank
return allowedDomains.any {
referer.substringAfter("//") // Ignore scheme
.substringBefore("/") // Ignore path
.endsWith(it)
}
}
private fun Request.handleCacheHit(sanitizedUri: String, cipher: Cipher, snapshot: DiskLruCache.Snapshot, imageDatum: ImageDatum): Response {
// our files never change, so it's safe to use the browser cache
return if (this.header("If-Modified-Since") != null) {
@ -274,6 +290,7 @@ class ImageServer(
private val JACKSON: ObjectMapper = jacksonObjectMapper()
.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
.registerModule(JavaTimeModule())
private val ALLOWED_REFERER_DOMAINS = listOf("mangadex.org", "mangadex.network") // TODO: Factor out hardcoded domains?
private fun baseHandler(): Filter =
CachingFilters.Response.MaxAge(Clock.systemUTC(), Constants.MAX_AGE_CACHE)