Add handling of HTTP '100 Continue' intermediate response

Add handling of HTTP '100 Continue' intermediate response

The '100 Continue' intermediate response is just ignored, as there
is currently no API for the client to wait to this.

BUG=http://dartbug.com/23413
R=kustermann@google.com

Committed: https://code.google.com/p/dart/source/detail?r=45685

[Søren Gjesse, 2015-05-11 12:19:26]

sgjesse@google.com changed reviewers:
+ kustermann@google.com

[kustermann, 2015-05-11 12:51:41]

lgtm

https://codereview.chromium.org/1128873011/diff/1/sdk/lib/io/http_impl.dart
File sdk/lib/io/http_impl.dart (right):

https://codereview.chromium.org/1128873011/diff/1/sdk/lib/io/http_impl.dart#n...
sdk/lib/io/http_impl.dart:1302: new HttpException(error.message, uri:
_currentUri),
indentation

[Søren Gjesse, 2015-05-11 13:41:13]

As discussed offline also tested it with a node.js server (which supports
requests with 'Expect: 100-continue') as well.

https://codereview.chromium.org/1128873011/diff/1/sdk/lib/io/http_impl.dart
File sdk/lib/io/http_impl.dart (right):

https://codereview.chromium.org/1128873011/diff/1/sdk/lib/io/http_impl.dart#n...
sdk/lib/io/http_impl.dart:1302: new HttpException(error.message, uri:
_currentUri),
On 2015/05/11 12:51:41, kustermann wrote:
> indentation

Done.

[Søren Gjesse, 2015-05-11 13:48:22]

Committed patchset #2 (id:20001) manually as 45685 (presubmit successful).