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</pre><pre class="rust"><code><span class="kw">use</span> <span class="ident">std</span>::{<span class="ident">collections::HashSet</span>, <span class="ident">convert::TryInto</span>, <span class="ident">error::Error</span> <span class="kw">as</span> <span class="ident">StdError</span>, <span class="ident">rc::Rc</span>};
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<span class="kw">use</span> <span class="ident">actix_utils::future::ok</span>;
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<span class="kw">use</span> <span class="ident">actix_web</span>::{
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<span class="ident">body</span>::{<span class="ident">EitherBody</span>, <span class="ident">MessageBody</span>},
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<span class="ident">dev</span>::{<span class="ident">Service</span>, <span class="ident">ServiceRequest</span>, <span class="ident">ServiceResponse</span>},
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<span class="ident">error</span>::{<span class="ident">Error</span>, <span class="prelude-ty">Result</span>},
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<span class="ident">http</span>::{
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<span class="ident">header</span>::{<span class="self">self</span>, <span class="ident">HeaderValue</span>},
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<span class="ident">Method</span>,
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},
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<span class="ident">HttpResponse</span>,
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};
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<span class="kw">use</span> <span class="ident">futures_util::future</span>::{<span class="ident">FutureExt</span> <span class="kw">as</span> <span class="kw">_</span>, <span class="ident">LocalBoxFuture</span>};
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<span class="kw">use</span> <span class="ident">log::debug</span>;
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<span class="kw">use</span> <span class="kw">crate</span>::{<span class="ident">builder::intersperse_header_values</span>, <span class="ident">AllOrSome</span>, <span class="ident">Inner</span>};
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<span class="doccomment">/// Service wrapper for Cross-Origin Resource Sharing support.</span>
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<span class="doccomment">///</span>
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<span class="doccomment">/// This struct contains the settings for CORS requests to be validated and for responses to</span>
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<span class="doccomment">/// be generated.</span>
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<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
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<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>)]</span>
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<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">CorsMiddleware</span><span class="op"><</span><span class="ident">S</span><span class="op">></span> {
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<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="ident">service</span>: <span class="ident">S</span>,
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<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="ident">inner</span>: <span class="ident">Rc</span><span class="op"><</span><span class="ident">Inner</span><span class="op">></span>,
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}
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<span class="kw">impl</span><span class="op"><</span><span class="ident">S</span><span class="op">></span> <span class="ident">CorsMiddleware</span><span class="op"><</span><span class="ident">S</span><span class="op">></span> {
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<span class="kw">fn</span> <span class="ident">handle_preflight</span>(<span class="ident">inner</span>: <span class="kw-2">&</span><span class="ident">Inner</span>, <span class="ident">req</span>: <span class="ident">ServiceRequest</span>) -> <span class="ident">ServiceResponse</span> {
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<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Err</span>(<span class="ident">err</span>) <span class="op">=</span> <span class="ident">inner</span>
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.<span class="ident">validate_origin</span>(<span class="ident">req</span>.<span class="ident">head</span>())
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.<span class="ident">and_then</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> <span class="ident">inner</span>.<span class="ident">validate_allowed_method</span>(<span class="ident">req</span>.<span class="ident">head</span>()))
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||
.<span class="ident">and_then</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> <span class="ident">inner</span>.<span class="ident">validate_allowed_headers</span>(<span class="ident">req</span>.<span class="ident">head</span>()))
|
||
{
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||
<span class="kw">return</span> <span class="ident">req</span>.<span class="ident">error_response</span>(<span class="ident">err</span>);
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||
}
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||
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||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">res</span> <span class="op">=</span> <span class="ident">HttpResponse::Ok</span>();
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||
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||
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">origin</span>) <span class="op">=</span> <span class="ident">inner</span>.<span class="ident">access_control_allow_origin</span>(<span class="ident">req</span>.<span class="ident">head</span>()) {
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||
<span class="ident">res</span>.<span class="ident">insert_header</span>((<span class="ident">header::ACCESS_CONTROL_ALLOW_ORIGIN</span>, <span class="ident">origin</span>));
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||
}
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||
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||
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">allowed_methods</span>) <span class="op">=</span> <span class="ident">inner</span>.<span class="ident">allowed_methods_baked</span> {
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||
<span class="ident">res</span>.<span class="ident">insert_header</span>((
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||
<span class="ident">header::ACCESS_CONTROL_ALLOW_METHODS</span>,
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<span class="ident">allowed_methods</span>.<span class="ident">clone</span>(),
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||
));
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||
}
|
||
|
||
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">headers</span>) <span class="op">=</span> <span class="ident">inner</span>.<span class="ident">allowed_headers_baked</span> {
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||
<span class="ident">res</span>.<span class="ident">insert_header</span>((<span class="ident">header::ACCESS_CONTROL_ALLOW_HEADERS</span>, <span class="ident">headers</span>.<span class="ident">clone</span>()));
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||
} <span class="kw">else</span> <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">headers</span>) <span class="op">=</span> <span class="ident">req</span>.<span class="ident">headers</span>().<span class="ident">get</span>(<span class="ident">header::ACCESS_CONTROL_REQUEST_HEADERS</span>) {
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<span class="comment">// all headers allowed, return</span>
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<span class="ident">res</span>.<span class="ident">insert_header</span>((<span class="ident">header::ACCESS_CONTROL_ALLOW_HEADERS</span>, <span class="ident">headers</span>.<span class="ident">clone</span>()));
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||
}
|
||
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||
<span class="kw">if</span> <span class="ident">inner</span>.<span class="ident">supports_credentials</span> {
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<span class="ident">res</span>.<span class="ident">insert_header</span>((
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<span class="ident">header::ACCESS_CONTROL_ALLOW_CREDENTIALS</span>,
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||
<span class="ident">HeaderValue::from_static</span>(<span class="string">"true"</span>),
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||
));
|
||
}
|
||
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||
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">max_age</span>) <span class="op">=</span> <span class="ident">inner</span>.<span class="ident">max_age</span> {
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||
<span class="ident">res</span>.<span class="ident">insert_header</span>((<span class="ident">header::ACCESS_CONTROL_MAX_AGE</span>, <span class="ident">max_age</span>.<span class="ident">to_string</span>()));
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||
}
|
||
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<span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="ident">res</span>.<span class="ident">finish</span>();
|
||
<span class="ident">req</span>.<span class="ident">into_response</span>(<span class="ident">res</span>)
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||
}
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||
|
||
<span class="kw">fn</span> <span class="ident">augment_response</span><span class="op"><</span><span class="ident">B</span><span class="op">></span>(<span class="ident">inner</span>: <span class="kw-2">&</span><span class="ident">Inner</span>, <span class="kw-2">mut</span> <span class="ident">res</span>: <span class="ident">ServiceResponse</span><span class="op"><</span><span class="ident">B</span><span class="op">></span>) -> <span class="ident">ServiceResponse</span><span class="op"><</span><span class="ident">B</span><span class="op">></span> {
|
||
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">origin</span>) <span class="op">=</span> <span class="ident">inner</span>.<span class="ident">access_control_allow_origin</span>(<span class="ident">res</span>.<span class="ident">request</span>().<span class="ident">head</span>()) {
|
||
<span class="ident">res</span>.<span class="ident">headers_mut</span>()
|
||
.<span class="ident">insert</span>(<span class="ident">header::ACCESS_CONTROL_ALLOW_ORIGIN</span>, <span class="ident">origin</span>);
|
||
};
|
||
|
||
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">expose</span>) <span class="op">=</span> <span class="ident">inner</span>.<span class="ident">expose_headers_baked</span> {
|
||
<span class="macro">log::trace!</span>(<span class="string">"exposing selected headers: {:?}"</span>, <span class="ident">expose</span>);
|
||
|
||
<span class="ident">res</span>.<span class="ident">headers_mut</span>()
|
||
.<span class="ident">insert</span>(<span class="ident">header::ACCESS_CONTROL_EXPOSE_HEADERS</span>, <span class="ident">expose</span>.<span class="ident">clone</span>());
|
||
} <span class="kw">else</span> <span class="kw">if</span> <span class="macro">matches!</span>(<span class="ident">inner</span>.<span class="ident">expose_headers</span>, <span class="ident">AllOrSome::All</span>) {
|
||
<span class="comment">// intersperse_header_values requires that argument is non-empty</span>
|
||
<span class="kw">if</span> <span class="op">!</span><span class="ident">res</span>.<span class="ident">request</span>().<span class="ident">headers</span>().<span class="ident">is_empty</span>() {
|
||
<span class="comment">// extract header names from request</span>
|
||
<span class="kw">let</span> <span class="ident">expose_all_request_headers</span> <span class="op">=</span> <span class="ident">res</span>
|
||
.<span class="ident">request</span>()
|
||
.<span class="ident">headers</span>()
|
||
.<span class="ident">keys</span>()
|
||
.<span class="ident">into_iter</span>()
|
||
.<span class="ident">map</span>(<span class="op">|</span><span class="ident">name</span><span class="op">|</span> <span class="ident">name</span>.<span class="ident">as_str</span>())
|
||
.<span class="ident">collect</span>::<span class="op"><</span><span class="ident">HashSet</span><span class="op"><</span><span class="kw">_</span><span class="op">></span><span class="op">></span>();
|
||
|
||
<span class="comment">// create comma separated string of header names</span>
|
||
<span class="kw">let</span> <span class="ident">expose_headers_value</span> <span class="op">=</span> <span class="ident">intersperse_header_values</span>(<span class="kw-2">&</span><span class="ident">expose_all_request_headers</span>);
|
||
|
||
<span class="macro">log::trace!</span>(
|
||
<span class="string">"exposing all headers from request: {:?}"</span>,
|
||
<span class="ident">expose_headers_value</span>
|
||
);
|
||
|
||
<span class="comment">// add header names to expose response header</span>
|
||
<span class="ident">res</span>.<span class="ident">headers_mut</span>()
|
||
.<span class="ident">insert</span>(<span class="ident">header::ACCESS_CONTROL_EXPOSE_HEADERS</span>, <span class="ident">expose_headers_value</span>);
|
||
}
|
||
}
|
||
|
||
<span class="kw">if</span> <span class="ident">inner</span>.<span class="ident">supports_credentials</span> {
|
||
<span class="ident">res</span>.<span class="ident">headers_mut</span>().<span class="ident">insert</span>(
|
||
<span class="ident">header::ACCESS_CONTROL_ALLOW_CREDENTIALS</span>,
|
||
<span class="ident">HeaderValue::from_static</span>(<span class="string">"true"</span>),
|
||
);
|
||
}
|
||
|
||
<span class="kw">if</span> <span class="ident">inner</span>.<span class="ident">vary_header</span> {
|
||
<span class="kw">let</span> <span class="ident">value</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">res</span>.<span class="ident">headers_mut</span>().<span class="ident">get</span>(<span class="ident">header::VARY</span>) {
|
||
<span class="prelude-val">Some</span>(<span class="ident">hdr</span>) => {
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">val</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span> <span class="op">=</span> <span class="ident">Vec::with_capacity</span>(<span class="ident">hdr</span>.<span class="ident">len</span>() <span class="op">+</span> <span class="number">8</span>);
|
||
<span class="ident">val</span>.<span class="ident">extend</span>(<span class="ident">hdr</span>.<span class="ident">as_bytes</span>());
|
||
<span class="ident">val</span>.<span class="ident">extend</span>(<span class="string">b", Origin"</span>);
|
||
<span class="ident">val</span>.<span class="ident">try_into</span>().<span class="ident">unwrap</span>()
|
||
}
|
||
<span class="prelude-val">None</span> => <span class="ident">HeaderValue::from_static</span>(<span class="string">"Origin"</span>),
|
||
};
|
||
|
||
<span class="ident">res</span>.<span class="ident">headers_mut</span>().<span class="ident">insert</span>(<span class="ident">header::VARY</span>, <span class="ident">value</span>);
|
||
}
|
||
|
||
<span class="ident">res</span>
|
||
}
|
||
}
|
||
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">S</span>, <span class="ident">B</span><span class="op">></span> <span class="ident">Service</span><span class="op"><</span><span class="ident">ServiceRequest</span><span class="op">></span> <span class="kw">for</span> <span class="ident">CorsMiddleware</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>
|
||
<span class="kw">where</span>
|
||
<span class="ident">S</span>: <span class="ident">Service</span><span class="op"><</span><span class="ident">ServiceRequest</span>, <span class="ident">Response</span> <span class="op">=</span> <span class="ident">ServiceResponse</span><span class="op"><</span><span class="ident">B</span><span class="op">></span>, <span class="ident">Error</span> <span class="op">=</span> <span class="ident">Error</span><span class="op">></span>,
|
||
<span class="ident">S::Future</span>: <span class="lifetime">'static</span>,
|
||
<span class="ident">B</span>: <span class="ident">MessageBody</span> <span class="op">+</span> <span class="lifetime">'static</span>,
|
||
<span class="ident">B::Error</span>: <span class="ident">StdError</span>,
|
||
{
|
||
<span class="kw">type</span> <span class="ident">Response</span> <span class="op">=</span> <span class="ident">ServiceResponse</span><span class="op"><</span><span class="ident">EitherBody</span><span class="op"><</span><span class="ident">B</span><span class="op">></span><span class="op">></span>;
|
||
<span class="kw">type</span> <span class="ident">Error</span> <span class="op">=</span> <span class="ident">Error</span>;
|
||
<span class="kw">type</span> <span class="ident">Future</span> <span class="op">=</span> <span class="ident">LocalBoxFuture</span><span class="op"><</span><span class="lifetime">'static</span>, <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">ServiceResponse</span><span class="op"><</span><span class="ident">EitherBody</span><span class="op"><</span><span class="ident">B</span><span class="op">></span><span class="op">></span>, <span class="ident">Error</span><span class="op">></span><span class="op">></span>;
|
||
|
||
<span class="macro">actix_service::forward_ready!</span>(<span class="ident">service</span>);
|
||
|
||
<span class="kw">fn</span> <span class="ident">call</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">req</span>: <span class="ident">ServiceRequest</span>) -> <span class="ident"><span class="self">Self</span>::Future</span> {
|
||
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">preflight</span> <span class="op">&&</span> <span class="ident">req</span>.<span class="ident">method</span>() <span class="op">==</span> <span class="ident">Method::OPTIONS</span> {
|
||
<span class="kw">let</span> <span class="ident">inner</span> <span class="op">=</span> <span class="ident">Rc::clone</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">inner</span>);
|
||
<span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="ident"><span class="self">Self</span>::handle_preflight</span>(<span class="kw-2">&</span><span class="ident">inner</span>, <span class="ident">req</span>);
|
||
<span class="ident">ok</span>(<span class="ident">res</span>.<span class="ident">map_into_right_body</span>()).<span class="ident">boxed_local</span>()
|
||
} <span class="kw">else</span> {
|
||
<span class="kw">let</span> <span class="ident">origin</span> <span class="op">=</span> <span class="ident">req</span>.<span class="ident">headers</span>().<span class="ident">get</span>(<span class="ident">header::ORIGIN</span>).<span class="ident">cloned</span>();
|
||
|
||
<span class="kw">if</span> <span class="ident">origin</span>.<span class="ident">is_some</span>() {
|
||
<span class="comment">// Only check requests with a origin header.</span>
|
||
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Err</span>(<span class="ident">err</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">validate_origin</span>(<span class="ident">req</span>.<span class="ident">head</span>()) {
|
||
<span class="macro">debug!</span>(<span class="string">"origin validation failed; inner service is not called"</span>);
|
||
<span class="kw">return</span> <span class="ident">ok</span>(<span class="ident">req</span>.<span class="ident">error_response</span>(<span class="ident">err</span>).<span class="ident">map_into_right_body</span>()).<span class="ident">boxed_local</span>();
|
||
}
|
||
}
|
||
|
||
<span class="kw">let</span> <span class="ident">inner</span> <span class="op">=</span> <span class="ident">Rc::clone</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">inner</span>);
|
||
<span class="kw">let</span> <span class="ident">fut</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">service</span>.<span class="ident">call</span>(<span class="ident">req</span>);
|
||
|
||
<span class="kw">async</span> <span class="kw">move</span> {
|
||
<span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="ident">fut</span>.<span class="kw">await</span>;
|
||
|
||
<span class="kw">if</span> <span class="ident">origin</span>.<span class="ident">is_some</span>() {
|
||
<span class="prelude-val">Ok</span>(<span class="ident"><span class="self">Self</span>::augment_response</span>(<span class="kw-2">&</span><span class="ident">inner</span>, <span class="ident">res</span><span class="question-mark">?</span>))
|
||
} <span class="kw">else</span> {
|
||
<span class="ident">res</span>
|
||
}
|
||
.<span class="ident">map</span>(<span class="op">|</span><span class="ident">res</span><span class="op">|</span> <span class="ident">res</span>.<span class="ident">map_into_left_body</span>())
|
||
}
|
||
.<span class="ident">boxed_local</span>()
|
||
}
|
||
}
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span>
|
||
<span class="kw">mod</span> <span class="ident">tests</span> {
|
||
<span class="kw">use</span> <span class="ident">actix_web</span>::{
|
||
<span class="ident">dev::Transform</span>,
|
||
<span class="ident">test</span>::{<span class="self">self</span>, <span class="ident">TestRequest</span>},
|
||
};
|
||
|
||
<span class="kw">use</span> <span class="kw">super</span>::<span class="kw-2">*</span>;
|
||
<span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::Cors</span>;
|
||
|
||
<span class="attribute">#[<span class="ident">actix_rt::test</span>]</span>
|
||
<span class="kw">async</span> <span class="kw">fn</span> <span class="ident">test_options_no_origin</span>() {
|
||
<span class="comment">// Tests case where allowed_origins is All but there are validate functions to run incase.</span>
|
||
<span class="comment">// In this case, origins are only allowed when the DNT header is sent.</span>
|
||
|
||
<span class="kw">let</span> <span class="ident">cors</span> <span class="op">=</span> <span class="ident">Cors::default</span>()
|
||
.<span class="ident">allow_any_origin</span>()
|
||
.<span class="ident">allowed_origin_fn</span>(<span class="op">|</span><span class="ident">origin</span>, <span class="ident">req_head</span><span class="op">|</span> {
|
||
<span class="macro">assert_eq!</span>(<span class="kw-2">&</span><span class="ident">origin</span>, <span class="ident">req_head</span>.<span class="ident">headers</span>.<span class="ident">get</span>(<span class="ident">header::ORIGIN</span>).<span class="ident">unwrap</span>());
|
||
|
||
<span class="ident">req_head</span>.<span class="ident">headers</span>().<span class="ident">contains_key</span>(<span class="ident">header::DNT</span>)
|
||
})
|
||
.<span class="ident">new_transform</span>(<span class="ident">test::ok_service</span>())
|
||
.<span class="kw">await</span>
|
||
.<span class="ident">unwrap</span>();
|
||
|
||
<span class="kw">let</span> <span class="ident">req</span> <span class="op">=</span> <span class="ident">TestRequest::get</span>()
|
||
.<span class="ident">insert_header</span>((<span class="ident">header::ORIGIN</span>, <span class="string">"http://example.com"</span>))
|
||
.<span class="ident">to_srv_request</span>();
|
||
<span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="ident">cors</span>.<span class="ident">call</span>(<span class="ident">req</span>).<span class="kw">await</span>.<span class="ident">unwrap</span>();
|
||
<span class="macro">assert_eq!</span>(
|
||
<span class="prelude-val">None</span>,
|
||
<span class="ident">res</span>.<span class="ident">headers</span>()
|
||
.<span class="ident">get</span>(<span class="ident">header::ACCESS_CONTROL_ALLOW_ORIGIN</span>)
|
||
.<span class="ident">map</span>(<span class="ident">HeaderValue::as_bytes</span>)
|
||
);
|
||
|
||
<span class="kw">let</span> <span class="ident">req</span> <span class="op">=</span> <span class="ident">TestRequest::get</span>()
|
||
.<span class="ident">insert_header</span>((<span class="ident">header::ORIGIN</span>, <span class="string">"http://example.com"</span>))
|
||
.<span class="ident">insert_header</span>((<span class="ident">header::DNT</span>, <span class="string">"1"</span>))
|
||
.<span class="ident">to_srv_request</span>();
|
||
<span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="ident">cors</span>.<span class="ident">call</span>(<span class="ident">req</span>).<span class="kw">await</span>.<span class="ident">unwrap</span>();
|
||
<span class="macro">assert_eq!</span>(
|
||
<span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="string">b"http://example.com"</span>[..]),
|
||
<span class="ident">res</span>.<span class="ident">headers</span>()
|
||
.<span class="ident">get</span>(<span class="ident">header::ACCESS_CONTROL_ALLOW_ORIGIN</span>)
|
||
.<span class="ident">map</span>(<span class="ident">HeaderValue::as_bytes</span>)
|
||
);
|
||
}
|
||
}
|
||
</code></pre></div>
|
||
</section><section id="search" class="content hidden"></section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="actix_cors" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.59.0-nightly (6bda5b331 2021-12-12)" ></div>
|
||
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