79 lines
2.3 KiB
Kotlin
79 lines
2.3 KiB
Kotlin
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package eu.kanade.tachiyomi.extension.en.xcalibrscans
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import android.graphics.Bitmap
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import android.graphics.BitmapFactory
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import android.graphics.Canvas
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import android.graphics.Rect
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import okhttp3.Interceptor
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import okhttp3.MediaType.Companion.toMediaType
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import okhttp3.Protocol
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import okhttp3.Response
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import okhttp3.ResponseBody.Companion.toResponseBody
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import java.io.ByteArrayOutputStream
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class AntiScrapInterceptor : Interceptor {
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override fun intercept(chain: Interceptor.Chain): Response {
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val request = chain.request()
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if (request.url.fragment != ANTI_SCRAP_FRAGMENT) {
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return chain.proceed(request)
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}
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val imageUrls = request.url
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.queryParameter("urls").orEmpty()
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.split(IMAGE_URLS_SEPARATOR)
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var width = 0
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var height = 0
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val imageBitmaps = imageUrls.map { imageUrl ->
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val newRequest = request.newBuilder().url(imageUrl).build()
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val response = chain.proceed(newRequest)
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val bitmap = BitmapFactory.decodeStream(response.body.byteStream())
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response.close()
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width += bitmap.width
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height = bitmap.height
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bitmap
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}
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val mergedBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)
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Canvas(mergedBitmap).apply {
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// Will mirror everything that are applied afterwards
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scale(-1F, 1F, width / 2F, height / 2F)
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// Merge the bitmaps vertically
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var left = 0
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imageBitmaps.forEach { bitmap ->
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val srcRect = Rect(0, 0, bitmap.width, bitmap.height)
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val dstRect = Rect(left, 0, left + bitmap.width, bitmap.height)
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drawBitmap(bitmap, srcRect, dstRect, null)
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left += bitmap.width
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}
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}
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val baos = ByteArrayOutputStream()
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mergedBitmap.compress(Bitmap.CompressFormat.PNG, 100, baos)
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return Response.Builder()
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.code(200)
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.protocol(Protocol.HTTP_1_1)
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.request(request)
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.message("OK")
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.body(baos.toByteArray().toResponseBody(pngMediaType))
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.build()
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}
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companion object {
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const val ANTI_SCRAP_FRAGMENT = "ANTI_SCRAP"
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const val IMAGE_URLS_SEPARATOR = "|"
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val pngMediaType = "image/png".toMediaType()
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}
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}
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