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Code Issues Projects Releases Wiki Activity

refactor(Tumblr): Use a common filter patch (#3018)

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Co-authored-by: oSumAtrIX <johan.melkonyan1@web.de>
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Temm 2023-10-01 05:11:48 +02:00 committed by GitHub
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8 changed files with 140 additions and 57 deletions
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42
src/main/kotlin/app/revanced/patches/tumblr/ads/DisableDashboardAds.kt
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package app.revanced.patches.tumblr.ads
import app.revanced.extensions.exception
import app.revanced.patcher.data.BytecodeContext
import app.revanced.patcher.extensions.InstructionExtensions.getInstruction
import app.revanced.patcher.extensions.InstructionExtensions.replaceInstruction
import app.revanced.patcher.patch.BytecodePatch
import app.revanced.patcher.patch.annotation.CompatiblePackage
import app.revanced.patcher.patch.annotation.Patch
import app.revanced.patches.tumblr.ads.fingerprints.AdWaterfallFingerprint
import com.android.tools.smali.dexlib2.iface.instruction.OneRegisterInstruction
import app.revanced.patches.tumblr.timelinefilter.TimelineFilterPatch
@Patch(
name = "Disable dashboard ads",
description = "Disables ads in the dashboard.",
compatiblePackages = [CompatiblePackage("com.tumblr")]
compatiblePackages = [CompatiblePackage("com.tumblr")],
dependencies = [TimelineFilterPatch::class]
)
@Suppress("unused")
object DisableDashboardAds : BytecodePatch(
setOf(AdWaterfallFingerprint)
) {
override fun execute(context: BytecodeContext) = AdWaterfallFingerprint.result?.let {
it.scanResult.stringsScanResult!!.matches.forEach { match ->
// We just replace all occurrences of "client_side_ad_waterfall" with anything else
// so the app fails to handle ads in the timeline elements array and just skips them.
// See AdWaterfallFingerprint for more info.
val stringRegister = it.mutableMethod.getInstruction<OneRegisterInstruction>(match.index).registerA
it.mutableMethod.replaceInstruction(
match.index, "const-string v$stringRegister, \"dummy\""
)
object DisableDashboardAds : BytecodePatch() {
override fun execute(context: BytecodeContext) {
// The timeline object types are filtered by their name in the TimelineObjectType enum.
// This is often different from the "object_type" returned in the api (noted in comments here)
arrayOf(
"CLIENT_SIDE_MEDIATION", // "client_side_ad_waterfall"
"GEMINI_AD", // "backfill_ad"
// The object types below weren't actually spotted in the wild in testing, but they are valid Object types
// and their names clearly indicate that they are ads, so we just block them anyway,
// just in case they will be used in the future.
"NIMBUS_AD", // "nimbus_ad"
"CLIENT_SIDE_AD", // "client_side_ad"
"DISPLAY_IO_INTERSCROLLER_AD", // "display_io_interscroller"
"DISPLAY_IO_HEADLINE_VIDEO_AD", // "display_io_headline_video"
"FACEBOOK_BIDDAABLE", // "facebook_biddable_sdk_ad"
"GOOGLE_NATIVE" // "google_native_ad"
).forEach {
TimelineFilterPatch.addObjectTypeFilter(it)
}
} ?: throw AdWaterfallFingerprint.exception
}
}

12
src/main/kotlin/app/revanced/patches/tumblr/ads/fingerprints/AdWaterfallFingerprint.kt
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package app.revanced.patches.tumblr.ads.fingerprints
import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
// The Tumblr app sends a request to /v2/timeline/dashboard which replies with an array of elements
// to show in the user dashboard. These element have different type ids (post, title, carousel, etc.)
// The standard dashboard Ad has the id client_side_ad_waterfall, and this string has to be in the code
// to handle ads and provide their appearance.
// If we just replace this string in the tumblr code with anything else, it will fail to recognize the
// dashboard object type and just skip it. This is a bit weird, but it shouldn't break
// unless they change the api (unlikely) or explicitly Change the tumblr code to prevent this.
object AdWaterfallFingerprint : MethodFingerprint(strings = listOf("client_side_ad_waterfall"))

29
src/main/kotlin/app/revanced/patches/tumblr/live/DisableTumblrLivePatch.kt
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package app.revanced.patches.tumblr.live
import app.revanced.extensions.exception
import app.revanced.patcher.data.BytecodeContext
import app.revanced.patcher.extensions.InstructionExtensions.getInstruction
import app.revanced.patcher.extensions.InstructionExtensions.replaceInstruction
import app.revanced.patcher.patch.BytecodePatch
import app.revanced.patcher.patch.annotation.CompatiblePackage
import app.revanced.patcher.patch.annotation.Patch
import app.revanced.patches.tumblr.featureflags.OverrideFeatureFlagsPatch
import app.revanced.patches.tumblr.live.fingerprints.LiveMarqueeFingerprint
import com.android.tools.smali.dexlib2.iface.instruction.OneRegisterInstruction
import app.revanced.patches.tumblr.timelinefilter.TimelineFilterPatch
@Patch(
name = "Disable Tumblr Live",
description = "Disable the Tumblr Live tab button and dashboard carousel.",
dependencies = [OverrideFeatureFlagsPatch::class],
dependencies = [OverrideFeatureFlagsPatch::class, TimelineFilterPatch::class],
compatiblePackages = [CompatiblePackage("com.tumblr")]
)
@Suppress("unused")
object DisableTumblrLivePatch : BytecodePatch(
setOf(LiveMarqueeFingerprint)
) {
override fun execute(context: BytecodeContext) = LiveMarqueeFingerprint.result?.let {
it.scanResult.stringsScanResult!!.matches.forEach { match ->
// Replace the string constant "live_marquee"
// with a dummy so the app doesn't recognize this type of element in the Dashboard and skips it
it.mutableMethod.apply {
val stringRegister = getInstruction<OneRegisterInstruction>(match.index).registerA
replaceInstruction(match.index, "const-string v$stringRegister, \"dummy2\"")
}
}
object DisableTumblrLivePatch : BytecodePatch() {
override fun execute(context: BytecodeContext) {
// Hide the LIVE_MARQUEE timeline element that appears in the feed
// Called "live_marquee" in api response
TimelineFilterPatch.addObjectTypeFilter("LIVE_MARQUEE")
// We hide the Tab button for Tumblr Live by forcing the feature flag to false
// Hide the Tab button for Tumblr Live by forcing the feature flag to false
OverrideFeatureFlagsPatch.addOverride("liveStreaming", "false")
} ?: throw LiveMarqueeFingerprint.exception
}
}

6
src/main/kotlin/app/revanced/patches/tumblr/live/fingerprints/LiveMarqueeFingerprint.kt
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package app.revanced.patches.tumblr.live.fingerprints
import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
// This works identically to the Tumblr AdWaterfallFingerprint, see comments there
object LiveMarqueeFingerprint : MethodFingerprint(strings = listOf("live_marquee"))

68
src/main/kotlin/app/revanced/patches/tumblr/timelinefilter/TimelineFilterPatch.kt Normal file
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package app.revanced.patches.tumblr.timelinefilter
import app.revanced.extensions.exception
import app.revanced.patcher.data.BytecodeContext
import app.revanced.patcher.extensions.InstructionExtensions.addInstructions
import app.revanced.patcher.extensions.InstructionExtensions.addInstructionsWithLabels
import app.revanced.patcher.extensions.InstructionExtensions.getInstruction
import app.revanced.patcher.extensions.InstructionExtensions.removeInstructions
import app.revanced.patcher.patch.BytecodePatch
import app.revanced.patcher.patch.annotation.Patch
import app.revanced.patches.tumblr.timelinefilter.fingerprints.PostsResponseConstructorFingerprint
import app.revanced.patches.tumblr.timelinefilter.fingerprints.TimelineConstructorFingerprint
import app.revanced.patches.tumblr.timelinefilter.fingerprints.TimelineFilterIntegrationFingerprint
import com.android.tools.smali.dexlib2.builder.instruction.BuilderInstruction35c
@Patch(description = "Filter timeline objects.", requiresIntegrations = true)
object TimelineFilterPatch : BytecodePatch(
setOf(TimelineConstructorFingerprint, TimelineFilterIntegrationFingerprint, PostsResponseConstructorFingerprint)
) {
/**
* Add a filter to hide the given timeline object type.
* The list of all Timeline object types is found in the TimelineObjectType class,
* where they are mapped from their api name (returned by tumblr via the HTTP API) to the enum value name.
*
* @param typeName The enum name of the timeline object type to hide.
*/
@Suppress("KDocUnresolvedReference")
internal lateinit var addObjectTypeFilter: (typeName: String) -> Unit private set
override fun execute(context: BytecodeContext) {
TimelineFilterIntegrationFingerprint.result?.let { integration ->
val filterInsertIndex = integration.scanResult.patternScanResult!!.startIndex
integration.mutableMethod.apply {
val addInstruction = getInstruction<BuilderInstruction35c>(filterInsertIndex + 1)
if (addInstruction.registerCount != 2) throw TimelineFilterIntegrationFingerprint.exception
val filterListRegister = addInstruction.registerC
val stringRegister = addInstruction.registerD
// Remove "BLOCKED_OBJECT_DUMMY"
removeInstructions(filterInsertIndex, 2)
addObjectTypeFilter = { typeName ->
// blockedObjectTypes.add({typeName})
addInstructionsWithLabels(
filterInsertIndex, """
const-string v$stringRegister, "$typeName"
invoke-interface { v$filterListRegister, v$stringRegister }, Ljava/util/HashSet;->add(Ljava/lang/Object;)Z
"""
)
}
}
} ?: throw TimelineFilterIntegrationFingerprint.exception
mapOf(
TimelineConstructorFingerprint to 1,
PostsResponseConstructorFingerprint to 2
).forEach { (fingerprint, timelineObjectsRegister) ->
fingerprint.result?.mutableMethod?.addInstructions(
0,
"invoke-static {p$timelineObjectsRegister}, " +
"Lapp/revanced/tumblr/patches/TimelineFilterPatch;->" +
"filterTimeline(Ljava/util/List;)V"
) ?: throw fingerprint.exception
}
}
}

12
src/main/kotlin/app/revanced/patches/tumblr/timelinefilter/fingerprints/PostsResponseConstructorFingerprint.kt Normal file
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package app.revanced.patches.tumblr.timelinefilter.fingerprints
import app.revanced.patcher.extensions.or
import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
import com.android.tools.smali.dexlib2.AccessFlags
// This is the constructor of the PostsResponse class.
// The same applies here as with the TimelineConstructorFingerprint.
object PostsResponseConstructorFingerprint : MethodFingerprint(
accessFlags = AccessFlags.CONSTRUCTOR or AccessFlags.PUBLIC,
customFingerprint = { methodDef, _ -> methodDef.definingClass.endsWith("/PostsResponse;") && methodDef.parameters.size == 4 },
)

12
src/main/kotlin/app/revanced/patches/tumblr/timelinefilter/fingerprints/TimelineConstructorFingerprint.kt Normal file
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package app.revanced.patches.tumblr.timelinefilter.fingerprints
import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
// This is the constructor of the Timeline class.
// It receives the List<TimelineObject> as an argument with a @Json annotation, so this should be the first time
// that the List<TimelineObject> is exposed in non-library code.
object TimelineConstructorFingerprint : MethodFingerprint(
customFingerprint = { methodDef, _ ->
methodDef.definingClass.endsWith("/Timeline;") && methodDef.parameters[0].type == "Ljava/util/List;"
}, strings = listOf("timelineObjectsList")
)

16
src/main/kotlin/app/revanced/patches/tumblr/timelinefilter/fingerprints/TimelineFilterIntegrationFingerprint.kt Normal file
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package app.revanced.patches.tumblr.timelinefilter.fingerprints
import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
import com.android.tools.smali.dexlib2.Opcode
// This fingerprints the Integration TimelineFilterPatch.filterTimeline method.
// The opcode fingerprint is searching for
// if ("BLOCKED_OBJECT_DUMMY".equals(elementType)) iterator.remove();
object TimelineFilterIntegrationFingerprint : MethodFingerprint(
customFingerprint = { methodDef, _ -> methodDef.definingClass.endsWith("/TimelineFilterPatch;") },
strings = listOf("BLOCKED_OBJECT_DUMMY"),
opcodes = listOf(
Opcode.CONST_STRING, // "BLOCKED_OBJECT_DUMMY"
Opcode.INVOKE_INTERFACE // List.add(^)
)
)