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Add support for request dataType to network data collection #1011

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Oct 1, 2025
Merged

Add support for request dataType to network data collection #1011

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d5a153f
Add support for request dataType to network data collection
juliandescottes Sep 26, 2025
2eca438
Address review comments about types
juliandescottes Sep 29, 2025
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87 changes: 71 additions & 16 deletions index.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -6876,11 +6876,40 @@ To <dfn>match collector for navigable</dfn> given |collector| and |navigable|:

</div>

<div algorithm>
To <dfn export>clone network request body</dfn> given [=/request=] |request|:

Note: This hook is intended to be triggered by the fetch spec when the request body has been safely extracted.
See step 9 of https://fetch.spec.whatwg.org/#concept-fetch

1. If |request|'s [=request/body=] is null, return.

1. For each |session| in [=active BiDi sessions=]:

1. If |session|'s [=network collectors=] is not [=list/empty=]:

1. Let |collected data| be a [=network data=] with
[=network-data/bytes=] set to null,
[=network-data/cloned body=] set to [=body/clone=] of |request|'s [=request/body=],
[=network-data/collectors=] set to an empty list,
[=network-data/pending=] set to true,
[=network-data/request=] set to |request|'s [=request id=],
[=network-data/size=] set to null,
[=network-data/type=] set to "response".

1. [=list/Append=] |collected data| to [=collected network data=].

1. Return.

</div>

<div algorithm>
To <dfn export>clone network response body</dfn> given |request| and |response body|:

Note: This hook is intended to be triggered by the fetch spec when the response is set.

1. If |response body| is null, return.

1. For each |session| in [=active BiDi sessions=]:

1. If |session|'s [=network collectors=] is not [=list/empty=]:
Expand Down Expand Up @@ -6925,19 +6954,52 @@ To <dfn>maybe abort network response body collection</dfn> given |request|:

</div>

<div algorithm>
To <dfn>maybe collect network request body</dfn> given |request|:

1. Let |collected data| be [=get collected data=] with |request|'s [=request id=] and "request".

1. If |collected data| is null, return.

NOTE: This might happen if there are no collectors setup when the request is created,
and [=clone network request body=] does not clone the corresponding body.
Or if the body was null in the first place.

1. [=Maybe collect network data=] with |request|, |collected data|, null and "request".

</div>

<div algorithm>
To <dfn>maybe collect network response body</dfn> given |request| and |response|:

1. If |response|'s [=response/status=] is a [=redirect status=], return.

Note: For redirects, only the final response body is stored.
NOTE: For redirects, only the final response body is stored.

1. Let |collected data| be [=get collected data=] with |request|'s [=request id=] and "response".

1. If |collected data| is null, return.

NOTE: This might happen if there are no collectors setup when the response is created,
and [=clone network response body=] does not clone the corresponding body.
Or if the body was null in the first place.

1. Let |size| be |response|'s [=response body info=]'s [=encoded size=].

NOTE: There is a discrepancy between the fact that the bytes retrieved from the
fetch stream correspond to the decoded data, but the encoded (network) size is
used in order to calculate size limits. Implementations might decide to use a storage
model such that it uses less size than storing the decoded data, as long as the data
returned to clients in getData is identical to the decoded data. The potential
tradeoff between storage and performance is up to the implementation.

1. [=Maybe collect network data=] with |request|, |collected data|, |size| and "response".

</div>

<div algorithm>
To <dfn>maybe collect network data</dfn> given [=/request=] |request|,
[=network data=] |collected data|, js-uint |size| and [=network.DataType=] |data type|:

1. Set |collected data|'s <code>pending</code> to false.

Expand All @@ -6947,7 +7009,7 @@ To <dfn>maybe collect network response body</dfn> given |request| and |response|

1. [=list/Remove=] |collected data| from [=collected network data=].

1. [=Resume=] with "<code>network data collected</code>" and (|request|'s [=request id=], "response").
1. [=Resume=] with "<code>network data collected</code>" and (|request|'s [=request id=], |data type|).

1. Return.

Expand All @@ -6963,7 +7025,7 @@ To <dfn>maybe collect network response body</dfn> given |request| and |response|

1. For each |collector| in |session|'s [=network collectors=]:

1. If |collector|'s [=network-collector/data types=] [=list/contains=] "response" and if
1. If |collector|'s [=network-collector/data types=] [=list/contains=] |data type| and if
[=match collector for navigable=] with |collector| and |top-level navigable|:

1. [=list/Append=] |collector| to |collectors|.
Expand All @@ -6972,28 +7034,19 @@ To <dfn>maybe collect network response body</dfn> given |request| and |response|

1. [=list/Remove=] |collected data| from [=collected network data=].

1. [=Resume=] with "<code>network data collected</code>" and (|request|'s [=request id=], "response").
1. [=Resume=] with "<code>network data collected</code>" and (|request|'s [=request id=], |data type|).

1. Return.

1. Let |bytes| be null.

1. Let |size| be null.

1. Let |processBody| given |nullOrBytes| be this step:

1. If |nullOrBytes| is not null:

1. Set |bytes| to [=serialize protocol bytes=] with |nullOrBytes|.

1. Set |size| to |response|'s [=response body info=]'s [=encoded size=].

Note: There is a discrepancy between the fact that the bytes retrieved from the
fetch stream correspond to the decoded data, but the encoded (network) size is
used in order to calculate size limits. Implementations might decide to use a storage
model such that it uses less size than storing the decoded data, as long as the data
returned to clients in getData is identical to the decoded data. The potential
tradeoff between storage and performance is up to the implementation.
1. If |size| is null, set |size| to |bytes|' [=byte sequence/length=].

1. Let |processBodyError| be this step: Do nothing.

Expand All @@ -7016,7 +7069,7 @@ To <dfn>maybe collect network response body</dfn> given |request| and |response|

1. Otherwise, [=list/remove=] |collected data| from [=collected network data=].

1. [=Resume=] with "<code>network data collected</code>" and (|request|'s [=request id=], "response").
1. [=Resume=] with "<code>network data collected</code>" and (|request|'s [=request id=], |data type|).

</div>

Expand Down Expand Up @@ -7524,7 +7577,7 @@ To <dfn>serialize cookie header</dfn> given |protocol cookie|:
{^Remote end definition^} and {^local end definition^}

<pre class="cddl" data-cddl-module="local-cddl,remote-cddl">
network.DataType = "response"
network.DataType = "request" / "response"
</pre>

The <code><dfn>network.DataType</dfn></code> type represents the different types of network data
Expand Down Expand Up @@ -9666,6 +9719,8 @@ request sent</dfn> steps given |request|:
are assumed to be valid at this stage; any error accessing the proxy will
be reported as a network error when handling the request.

1. [=Maybe collect network request body=] with |request|.

1. If [=before request sent map=] does not contain |request|, set [=before
request sent map=][|request|] to a new set.

Expand Down