Re: [fetch] Introduce Response.body. (#118) (#128)

> What is the reason for not introducing Request.prototype.body?

Hmm, I made that decision ago, and at that time it looked difficult to reading body stream bytes when fetching. I reconsidered it and it might be possible by changing the fech() function as following.

from:

 - Fetch _request_

to:

 - Let _reader_ be the result of getting a reader from _request_.body. If that throws an exception, reject _p_ with that exception and abort these steps.
 - Let _promise_ be the result of reading all data from _request_.body with _reader_.
  - When _promise_ is fulfilled with _bytes_, set _request_'s body to _bytes_ and Fetch _request_.
  - When _promise_ is rejected with an error, reject _p_ with that error.

What do you think about it?


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