I want to return "too large body" response whenever a request's body is
larger than setting.
However, when the request has "Expect" header, the connection may be reset
if the requestbody is not read to end.
Then, I added check function. The function check 'Content-Length' and
return error response if the length is larger than setting.
if !checkExpect(request.Header) { // check if "Expect" header exists
// do nothing...( this block is to take C1 coverage )
} else {
return NewError("body is too large")
}
buf := bytes.NewBuffer([]byte{})
_, err := io.CopyN(buf, request.Body, setting + 1)
if err == nil {
return NewError("body is too large")
} else if err == io.EOF {
// do nothing...( this block is to take C1 coverage )
} else {
return NewError("failed to read")
}
But, if 'Content-Length' is camouflaged and smaller than real bodysize,
this code read body and connection may be reset.
In addition, if the request has "Transfer-Encoding" header,
request.ContentLength is -1.
Why the connection is reset when the requestbody is not read to end?
When "Content-Length" header is camoflauged or negative value, How should I
keep the connection?
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