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Remove Authorization header upon cross-origin redirect #1544

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Nov 25, 2022
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Remove Authorization header upon cross-origin redirect #1544

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17 changes: 13 additions & 4 deletions fetch.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -4934,11 +4934,10 @@ run these steps:
<li><p>If <var>locationURL</var>'s <a for=url>scheme</a> is not an <a>HTTP(S) scheme</a>, then
return a <a>network error</a>.

<li><p>If <var>request</var>'s <a for=request>redirect count</a> is
twenty, return a <a>network error</a>.
<li><p>If <var>request</var>'s <a for=request>redirect count</a> is 20, then return a
<a>network error</a>.

<li><p>Increase <var>request</var>'s
<a for=request>redirect count</a> by one.
<li><p>Increase <var>request</var>'s <a for=request>redirect count</a> by 1.

<li><p>If <var>request</var>'s <a for=request>mode</a> is "<code>cors</code>",
<var>locationURL</var> <a>includes credentials</a>, and <var>request</var>'s
Expand Down Expand Up @@ -4976,6 +4975,16 @@ run these steps:
<a for=request>header list</a>.
</ol>

<li>
<p>If <var>request</var>'s <a for=request>current URL</a>'s <a for=url>origin</a> is not
<a>same origin</a> with <var>locationURL</var>'s <a for=url>origin</a>, then
<a for=list>for each</a> <var>headerName</var> of <a>CORS non-wildcard request-header name</a>,
<a for="header list">delete</a> <var>headerName</var> from <var>request</var>'s
<a for=request>header list</a>.

<p class=note>I.e., the moment another origin is seen after the initial request, the
`<code>Authorization</code>` header is removed.

<li>
<p>If <var>request</var>'s <a for=request>body</a> is non-null, then set <var>request</var>'s
<a for=request>body</a> to the <a for="body with type">body</a> of the result of
Expand Down