Java NIO，读取未完成

Question

I am attempting to write a simple HTTP async server and a test client. My test client makes a bunch of requests to the server, but doesn't do anything with the response except read it. The problem I'm running into is after a bunch of successful responses, my client fails to read the full response of a particular request. I have no idea why this is happening.

Here is the read/write handler for my server: read/write handler

The important code is the function that sends the file:

    public void handleWrite(SelectionKey key) throws IOException {
    client.write(out); // Write the headers to the stream
    if (state == State.SENDING_RESPONSE && out.remaining() == 0) {
        // We are done writing the headers
        if (sendFile && (mapped == null)) {
            // Send the file via direct transfer
            System.err.println("DT: " + fPath + " " + pos + "/" + fileSize);
            long transferred = f.transferTo(pos, fileSize, client);
            pos += transferred;
            System.err.println("DT: " + fPath + " " + pos + "/" + fileSize);
        } else if (mapped != null){
            // Send the file (in mapped from either filesystem or from
            // cache)
            System.err.println("MAPPED: " + fPath + " " + mapped.position() + "/" + mapped.limit());
            written += client.write(mapped);
            System.err.println("MAPPED: " + fPath + " " + written + "/" + mapped.limit());
        }
    }
    if (out.remaining() == 0
            && ((mapped == null && pos == fileSize) || (mapped != null && mapped
                    .remaining() == 0))) {
        // We are done transferring the file!
        System.err.println(pos + " " + fileSize);
        assert (pos == fileSize) || (mapped.position() == mapped.limit()) : "File not sent.";
        // Must reset position if from cache
        if (inCache) {
            mapped.position(0);
        }
        if (sendFile) {
            cache();
            f.close();
            inputStream.close();
        }
        state = State.SOCKET_CLOSED;
        d.getKey(client).cancel();
        client.close();
    }
}

and here is the response handler in the client: response handler

Important code is the read part:

        if((sz = header.get("content-length")) != null) {
        bodySize = Integer.parseInt(sz);
        byte[] buff = new byte[bodySize];
        int k = 0, read = 0;
        while((k = connection.getInputStream().read(buff, read, bodySize - read)) != -1 && read < bodySize) {
            read += k;
        }
        assert read == bodySize : "Not all of file read. " + read + " " + bodySize;
    }

The assertion at the bottom of the response handler is the one that's failing. I've also included the server and dispatcher themselves, as well as the client if thats helpful. server/dispatcher client

Answer 1

while((k = connection.getInputStream().read(buff, read, bodySize - read)) != -1 && read < bodySize) {
      read += k;

Throw that away and use DataInputStream.readFully(data).