Ensure that all buffers used inside HTTP client will follow original buffer size. (#530)

Ensure that buffer size cannot be lower than default size.

chronos/apps/http/httpclient.nim

@@ -567,7 +567,8 @@ proc new(
       tls =
         try:
           newTLSClientAsyncStream(treader, twriter, ha.hostname,
-                                  flags = session.flags.getTLSFlags())
+                                  flags = session.flags.getTLSFlags(),
+                                  bufferSize = session.connectionBufferSize)
         except TLSStreamInitError as exc:
           return err(exc.msg)
 
@@ -1327,13 +1328,18 @@ proc getBodyReader*(response: HttpClientResponseRef): HttpBodyReader {.
     let reader =
       case response.bodyFlag
       of HttpClientBodyFlag.Sized:
-        let bstream = newBoundedStreamReader(response.connection.reader,
+        newHttpBodyReader(
-                                             response.contentLength)
+          newBoundedStreamReader(
-        newHttpBodyReader(bstream)
+            response.connection.reader, response.contentLength,
+            bufferSize = response.session.connectionBufferSize))
       of HttpClientBodyFlag.Chunked:
-        newHttpBodyReader(newChunkedStreamReader(response.connection.reader))
+        newHttpBodyReader(
+          newChunkedStreamReader(
+            response.connection.reader,
+            bufferSize = response.session.connectionBufferSize))
       of HttpClientBodyFlag.Custom:
-        newHttpBodyReader(newAsyncStreamReader(response.connection.reader))
+        newHttpBodyReader(
+          newAsyncStreamReader(response.connection.reader))
     response.connection.state = HttpClientConnectionState.ResponseBodyReceiving
     response.reader = reader
   response.reader

chronos/streams/asyncstream.nim

@@ -929,7 +929,8 @@ proc init*(child, rsource: AsyncStreamReader, loop: StreamReaderLoop,
   child.readerLoop = loop
   child.rsource = rsource
   child.tsource = rsource.tsource
-  child.buffer = AsyncBufferRef.new(bufferSize)
+  let size = max(AsyncStreamDefaultBufferSize, bufferSize)
+  child.buffer = AsyncBufferRef.new(size)
   trackCounter(AsyncStreamReaderTrackerName)
   child.startReader()
 
@@ -941,7 +942,8 @@ proc init*[T](child, rsource: AsyncStreamReader, loop: StreamReaderLoop,
   child.readerLoop = loop
   child.rsource = rsource
   child.tsource = rsource.tsource
-  child.buffer = AsyncBufferRef.new(bufferSize)
+  let size = max(AsyncStreamDefaultBufferSize, bufferSize)
+  child.buffer = AsyncBufferRef.new(size)
   if not isNil(udata):
     GC_ref(udata)
     child.udata = cast[pointer](udata)

chronos/transports/stream.nim

@@ -585,7 +585,8 @@ when defined(windows):
                                       udata: cast[pointer](transp))
     transp.wovl.data = CompletionData(cb: writeStreamLoop,
                                       udata: cast[pointer](transp))
-    transp.buffer = BipBuffer.init(bufsize)
+    let size = max(bufsize, DefaultStreamBufferSize)
+    transp.buffer = BipBuffer.init(size)
     transp.state = {ReadPaused, WritePaused}
     transp.queue = initDeque[StreamVector]()
     transp.future = Future[void].Raising([]).init(
@@ -606,7 +607,8 @@ when defined(windows):
                                       udata: cast[pointer](transp))
     transp.wovl.data = CompletionData(cb: writeStreamLoop,
                                       udata: cast[pointer](transp))
-    transp.buffer = BipBuffer.init(bufsize)
+    let size = max(bufsize, DefaultStreamBufferSize)
+    transp.buffer = BipBuffer.init(size)
     transp.flags = flags
     transp.state = {ReadPaused, WritePaused}
     transp.queue = initDeque[StreamVector]()
@@ -1452,7 +1454,8 @@ else:
       transp = StreamTransport(kind: TransportKind.Socket)
 
     transp.fd = sock
-    transp.buffer = BipBuffer.init(bufsize)
+    let size = max(bufsize, DefaultStreamBufferSize)
+    transp.buffer = BipBuffer.init(size)
     transp.state = {ReadPaused, WritePaused}
     transp.queue = initDeque[StreamVector]()
     transp.future = Future[void].Raising([]).init(
@@ -1469,7 +1472,8 @@ else:
       transp = StreamTransport(kind: TransportKind.Pipe)
 
     transp.fd = fd
-    transp.buffer = BipBuffer.init(bufsize)
+    let size = max(bufsize, DefaultStreamBufferSize)
+    transp.buffer = BipBuffer.init(size)
     transp.state = {ReadPaused, WritePaused}
     transp.queue = initDeque[StreamVector]()
     transp.future = Future[void].Raising([]).init(