Always close response body

app/src/main/java/eu/kanade/tachiyomi/data/cache/ChapterCache.kt

@@ -202,9 +202,9 @@ class ChapterCache(private val context: Context) {
             diskCache.flush()
             editor.commit()
         } catch (e: Exception) {
-            response.body().close()
             throw IOException("Unable to save image")
         } finally {
+            response.body().close()
             editor?.abortUnlessCommitted()
         }
     }

app/src/main/java/eu/kanade/tachiyomi/data/network/NetworkHelper.kt

@@ -44,21 +44,21 @@ class NetworkHelper(context: Context) {
 
     @JvmOverloads
     fun request(request: Request, forceCache: Boolean = false): Observable<Response> {
-        var response: Response? = null
         return Observable.fromCallable {
             val c = if (forceCache) forceCacheClient else client
-            c.newCall(request).execute().apply { response = this }
-        }.doOnUnsubscribe { response?.body()?.close() }
+            c.newCall(request).execute().apply { body().close() }
+        }
     }
 
     @JvmOverloads
     fun requestBody(request: Request, forceCache: Boolean = false): Observable<String> {
-        return request(request, forceCache)
-                .map { it.body().string() }
+        return Observable.fromCallable {
+            val c = if (forceCache) forceCacheClient else client
+            c.newCall(request).execute().body().string()
+        }
     }
 
     fun requestBodyProgress(request: Request, listener: ProgressListener): Observable<Response> {
-        var response: Response? = null
         return Observable.fromCallable {
             val progressClient = client.newBuilder()
                     .cache(null)
@@ -70,8 +70,8 @@ class NetworkHelper(context: Context) {
                     }
                     .build()
 
-            progressClient.newCall(request).execute().apply { response = this }
-        }.doOnUnsubscribe { response?.body()?.close() }.retry(1)
+            progressClient.newCall(request).execute()
+        }
     }
 
     val cookies: CookieStore

app/src/main/java/eu/kanade/tachiyomi/util/DiskUtils.java

@@ -5,6 +5,7 @@ import java.io.IOException;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 
+import okhttp3.internal.Util;
 import okio.BufferedSink;
 import okio.BufferedSource;
 import okio.Okio;
@@ -59,9 +60,8 @@ public final class DiskUtils {
             writeFile.delete();
             throw new IOException("Unable to save image");
         } finally {
-            if (bufferedSink != null) {
-                bufferedSink.close();
-            }
+            Util.closeQuietly(bufferedSink);
+            Util.closeQuietly(bufferedSource);
         }
 
         return writeFile;