Introduce CronetRequest.copyToChannel

app/src/main/java/com/hippo/ehviewer/coil/CronetHttpUriFetcher.kt

@@ -12,7 +12,7 @@ import coil.fetch.FetchResult
 import coil.fetch.Fetcher
 import coil.fetch.SourceResult
 import coil.request.Options
-import com.hippo.ehviewer.cronet.awaitBodyFully
+import com.hippo.ehviewer.cronet.copyToChannel
 import com.hippo.ehviewer.cronet.cronetRequest
 import com.hippo.ehviewer.cronet.execute
 import java.io.RandomAccessFile
@@ -30,11 +30,8 @@ class CronetHttpUriFetcher(private val data: String, private val options: Option
                 disableCache()
             }.execute {
                 val success = diskCache.suspendEdit(diskCacheKey) {
-                    RandomAccessFile(data.toFile(), "rw").use { f ->
-                        val chan = f.channel
-                        awaitBodyFully { buffer ->
-                            chan.write(buffer)
-                        }
+                    RandomAccessFile(data.toFile(), "rw").use {
+                        copyToChannel(it.channel)
                     }
                 }
                 check(success)

app/src/main/java/com/hippo/ehviewer/cronet/CronetKt.kt

@@ -18,6 +18,7 @@ import org.chromium.net.UrlRequest
 import org.chromium.net.UrlResponseInfo
 import splitties.init.appCtx
 import java.nio.ByteBuffer
+import java.nio.channels.FileChannel
 import kotlin.coroutines.Continuation
 import kotlin.coroutines.resume
 import kotlin.coroutines.resumeWithException
@@ -98,6 +99,11 @@ suspend inline fun CronetRequest.awaitBodyFully(crossinline callback: (ByteBuffe
     }
 }
 
+suspend inline fun CronetRequest.copyToChannel(chan: FileChannel, crossinline listener: ((Int) -> Unit) = {}) = awaitBodyFully {
+    val bytes = chan.write(it)
+    listener(bytes)
+}
+
 suspend inline fun CronetRequest.execute(crossinline callback: suspend CronetRequest.(UrlResponseInfo) -> Unit) = coroutineScope {
     onResponse = { launch { callback(it) } }
     suspendCancellableCoroutine { cont ->

app/src/main/java/com/hippo/ehviewer/spider/SpiderDen.kt

@@ -26,7 +26,7 @@ import com.hippo.ehviewer.client.executeNonCache
 import com.hippo.ehviewer.client.getImageKey
 import com.hippo.ehviewer.coil.read
 import com.hippo.ehviewer.coil.suspendEdit
-import com.hippo.ehviewer.cronet.awaitBodyFully
+import com.hippo.ehviewer.cronet.copyToChannel
 import com.hippo.ehviewer.cronet.cronetRequest
 import com.hippo.ehviewer.cronet.execute
 import com.hippo.ehviewer.download.downloadLocation
@@ -141,11 +141,10 @@ class SpiderDen(mGalleryInfo: GalleryInfo) {
                 val type = headers["Content-Type"]?.first()?.toMediaType()?.subtype ?: "jpg"
                 val length = headers["Content-Length"]!!.first().toLong()
                 saveResponseMeta(index, type, length) { file ->
-                    file.openOutputStream().use {
-                        val chan = it.channel
-                        awaitBodyFully { buffer ->
-                            val read = chan.write(buffer)
-                            notifyProgress(length, info.receivedByteCount, read)
+                    file.openOutputStream().use { os ->
+                        val chan = os.channel
+                        copyToChannel(chan) {
+                            notifyProgress(length, info.receivedByteCount, it)
                         }.also { size -> if (chan.size() != size) chan.truncate(size) }
                     }
                 }