On 27/09/2021 09:08, Goldengate liu wrote:
Hi Mark,
I’m uploading some test files
Thanks for the test case. I'm looking at this now.
Mark
Below are the steps:
1. compile GetPayloadServlet.java and put it to
webapps/test/WEB-INF/classes/test/
2. put web.xml to webapps/test/WEB-INF/
3. start tomcat (9.0.19), I tried with 9.0.53, I got the same result
4. use HttpPostTest(I’m using Apache httpclient-4.5.1.jar,
httpcore-4.4.4.jar), the test is sending data with chunked
transfer-encoding, one step here
4.1. put a debug point before streamWrite at flushBuffer method in
org.apache.http.impl.io.SessionOutputBufferImpl, the purpose is to pause
flushing to the socket
*private* *void* flushBuffer() *throws* IOException {
*final* *int* len = *this*.buffer.length();
*if* (len > 0) {
streamWrite(*this*.buffer.buffer(), 0, len);
*this*.buffer.clear();
*this*.metrics.incrementBytesTransferred(len);
}
}
5. put a debug point on GetPayloadServlet
@Override
public void onDataAvailable() throws IOException {
byte buffer[] = new byte[BUFFER_SIZE];
while(inputStream.isReady()) {// when isReady returns true,
inputStream.read(buffer) is actually blocked with chunked encoding
int read = inputStream.read(buffer);
if (read < 0) {
break;
}
bos.write(buffer, 0, read);
}
}
6. we can see once SessionOutputBufferImpl.flushBuffer flushes the
data,inputStream.read(buffer) inside GetPayloadServlet will be
un-blocked with read
Or am I doing something wrong? this is a basic use case.
Thanks,
Andrew
On Sep 22, 2021, at 1:14 AM, Mark Thomas <ma...@apache.org
<mailto:ma...@apache.org>> wrote:
On 22/09/2021 08:22, Goldengate liu wrote:
Hi Chris,
Servlet 3.1 spec defines that ServletInputStream can be used to
read as non-blocking way as long as there is data ready locally by
calling isReady method and check the ready condition before calling
read, and read should throw IllegalStateException if called by
caller when data is not ready
The above only applies if the servlet is in async mode. Is it?
correct, when it’s running as async mode
OK. You are going to need to provide the simplest complete example
that demonstrates this then. Something like the source for a single
Servlet and a curl command to send a request to it.
Mark
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