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385 lines
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</pre><div class="example-wrap"><pre class="rust ">
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<span class="doccomment">//! Fairing implementation</span>
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<span class="kw">use</span> ::<span class="ident">log</span>::{<span class="ident">error</span>, <span class="ident">info</span>, <span class="ident">log</span>};
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<span class="kw">use</span> <span class="ident">rocket</span>::<span class="ident">http</span>::{<span class="self">self</span>, <span class="ident">uri</span>::<span class="ident">Origin</span>, <span class="ident">Status</span>};
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<span class="kw">use</span> <span class="ident">rocket</span>::{<span class="self">self</span>, <span class="ident">error_</span>, <span class="ident">info_</span>, <span class="ident">log_</span>, <span class="ident">Outcome</span>, <span class="ident">Request</span>};
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<span class="kw">use</span> <span class="kw">crate</span>::{
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<span class="ident">actual_request_response</span>, <span class="ident">origin</span>, <span class="ident">preflight_response</span>, <span class="ident">request_headers</span>, <span class="ident">validate</span>, <span class="ident">Cors</span>, <span class="ident">Error</span>,
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};
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<span class="doccomment">/// Request Local State to store CORS validation results</span>
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<span class="kw">enum</span> <span class="ident">CorsValidation</span> {
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<span class="ident">Success</span>,
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<span class="ident">Failure</span>,
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}
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<span class="doccomment">/// Route for Fairing error handling</span>
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<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">fairing_error_route</span><span class="op"><</span><span class="lifetime">'r</span><span class="op">></span>(
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<span class="ident">request</span>: <span class="kw-2">&</span><span class="lifetime">'r</span> <span class="ident">Request</span><span class="op"><</span><span class="lifetime">'_</span><span class="op">></span>,
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<span class="kw">_</span>: <span class="ident">rocket</span>::<span class="ident">Data</span>,
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) <span class="op">-</span><span class="op">></span> <span class="ident">rocket</span>::<span class="ident">handler</span>::<span class="ident">Outcome</span><span class="op"><</span><span class="lifetime">'r</span><span class="op">></span> {
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<span class="kw">let</span> <span class="ident">status</span> <span class="op">=</span> <span class="ident">request</span>
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.<span class="ident">get_param</span>::<span class="op"><</span><span class="ident">u16</span><span class="op">></span>(<span class="number">0</span>)
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.<span class="ident">unwrap_or</span>(<span class="prelude-val">Ok</span>(<span class="number">0</span>))
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.<span class="ident">unwrap_or_else</span>(<span class="op">|</span><span class="ident">e</span><span class="op">|</span> {
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<span class="macro">error_</span><span class="macro">!</span>(<span class="string">"Fairing Error Handling Route error: {:?}"</span>, <span class="ident">e</span>);
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<span class="number">500</span>
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});
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<span class="kw">let</span> <span class="ident">status</span> <span class="op">=</span> <span class="ident">Status</span>::<span class="ident">from_code</span>(<span class="ident">status</span>).<span class="ident">unwrap_or_else</span>(<span class="op">|</span><span class="op">|</span> <span class="ident">Status</span>::<span class="ident">InternalServerError</span>);
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<span class="ident">Outcome</span>::<span class="ident">Failure</span>(<span class="ident">status</span>)
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}
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<span class="doccomment">/// Create a new `Route` for Fairing handling</span>
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<span class="kw">fn</span> <span class="ident">fairing_route</span>(<span class="ident">rank</span>: <span class="ident">isize</span>) <span class="op">-</span><span class="op">></span> <span class="ident">rocket</span>::<span class="ident">Route</span> {
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<span class="ident">rocket</span>::<span class="ident">Route</span>::<span class="ident">ranked</span>(<span class="ident">rank</span>, <span class="ident">http</span>::<span class="ident">Method</span>::<span class="ident">Get</span>, <span class="string">"/<status>"</span>, <span class="ident">fairing_error_route</span>)
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}
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<span class="doccomment">/// Modifies a `Request` to route to Fairing error handler</span>
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<span class="kw">fn</span> <span class="ident">route_to_fairing_error_handler</span>(<span class="ident">options</span>: <span class="kw-2">&</span><span class="ident">Cors</span>, <span class="ident">status</span>: <span class="ident">u16</span>, <span class="ident">request</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Request</span><span class="op"><</span><span class="lifetime">'_</span><span class="op">></span>) {
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<span class="kw">let</span> <span class="ident">origin</span> <span class="op">=</span> <span class="ident">Origin</span>::<span class="ident">parse_owned</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}/{}"</span>, <span class="ident">options</span>.<span class="ident">fairing_route_base</span>, <span class="ident">status</span>)).<span class="ident">unwrap</span>();
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<span class="ident">request</span>.<span class="ident">set_method</span>(<span class="ident">http</span>::<span class="ident">Method</span>::<span class="ident">Get</span>);
|
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<span class="ident">request</span>.<span class="ident">set_uri</span>(<span class="ident">origin</span>);
|
||
}
|
||
|
||
<span class="kw">fn</span> <span class="ident">on_response_wrapper</span>(
|
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<span class="ident">options</span>: <span class="kw-2">&</span><span class="ident">Cors</span>,
|
||
<span class="ident">request</span>: <span class="kw-2">&</span><span class="ident">Request</span><span class="op"><</span><span class="lifetime">'_</span><span class="op">></span>,
|
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<span class="ident">response</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">rocket</span>::<span class="ident">Response</span><span class="op"><</span><span class="lifetime">'_</span><span class="op">></span>,
|
||
) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">Error</span><span class="op">></span> {
|
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<span class="kw">let</span> <span class="ident">origin</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">origin</span>(<span class="ident">request</span>)<span class="question-mark">?</span> {
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<span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> {
|
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<span class="comment">// Not a CORS request</span>
|
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<span class="kw">return</span> <span class="prelude-val">Ok</span>(());
|
||
}
|
||
<span class="prelude-val">Some</span>(<span class="ident">origin</span>) <span class="op">=</span><span class="op">></span> <span class="ident">origin</span>,
|
||
};
|
||
|
||
<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">request</span>.<span class="ident">local_cache</span>(<span class="op">|</span><span class="op">|</span> <span class="macro">unreachable</span><span class="macro">!</span>(<span class="string">"This should not be executed so late"</span>));
|
||
|
||
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">CorsValidation</span>::<span class="ident">Failure</span> <span class="op">=</span> <span class="kw-2">*</span><span class="ident">result</span> {
|
||
<span class="comment">// Nothing else for us to do</span>
|
||
<span class="kw">return</span> <span class="prelude-val">Ok</span>(());
|
||
}
|
||
|
||
<span class="kw">let</span> <span class="ident">origin</span> <span class="op">=</span> <span class="ident">origin</span>.<span class="ident">to_string</span>();
|
||
<span class="kw">let</span> <span class="ident">cors_response</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">request</span>.<span class="ident">method</span>() <span class="op">=</span><span class="op">=</span> <span class="ident">http</span>::<span class="ident">Method</span>::<span class="ident">Options</span> {
|
||
<span class="kw">let</span> <span class="ident">headers</span> <span class="op">=</span> <span class="ident">request_headers</span>(<span class="ident">request</span>)<span class="question-mark">?</span>;
|
||
<span class="ident">preflight_response</span>(<span class="ident">options</span>, <span class="kw-2">&</span><span class="ident">origin</span>, <span class="ident">headers</span>.<span class="ident">as_ref</span>())
|
||
} <span class="kw">else</span> {
|
||
<span class="ident">actual_request_response</span>(<span class="ident">options</span>, <span class="kw-2">&</span><span class="ident">origin</span>)
|
||
};
|
||
|
||
<span class="ident">cors_response</span>.<span class="ident">merge</span>(<span class="ident">response</span>);
|
||
|
||
<span class="comment">// If this was an OPTIONS request and no route can be found, we should turn this</span>
|
||
<span class="comment">// into a HTTP 204 with no content body.</span>
|
||
<span class="comment">// This allows the user to not have to specify an OPTIONS route for everything.</span>
|
||
<span class="comment">//</span>
|
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<span class="comment">// TODO: Is there anyway we can make this smarter? Only modify status codes for</span>
|
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<span class="comment">// requests where an actual route exist?</span>
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<span class="kw">if</span> <span class="ident">request</span>.<span class="ident">method</span>() <span class="op">=</span><span class="op">=</span> <span class="ident">http</span>::<span class="ident">Method</span>::<span class="ident">Options</span> <span class="kw-2">&</span><span class="op">&</span> <span class="ident">request</span>.<span class="ident">route</span>().<span class="ident">is_none</span>() {
|
||
<span class="macro">info_</span><span class="macro">!</span>(
|
||
<span class="string">"CORS Fairing: Turned missing route {} into an OPTIONS pre-flight request"</span>,
|
||
<span class="ident">request</span>
|
||
);
|
||
<span class="ident">response</span>.<span class="ident">set_status</span>(<span class="ident">Status</span>::<span class="ident">NoContent</span>);
|
||
<span class="kw">let</span> <span class="kw">_</span> <span class="op">=</span> <span class="ident">response</span>.<span class="ident">take_body</span>();
|
||
}
|
||
<span class="prelude-val">Ok</span>(())
|
||
}
|
||
|
||
<span class="kw">impl</span> <span class="ident">rocket</span>::<span class="ident">fairing</span>::<span class="ident">Fairing</span> <span class="kw">for</span> <span class="ident">Cors</span> {
|
||
<span class="kw">fn</span> <span class="ident">info</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">rocket</span>::<span class="ident">fairing</span>::<span class="ident">Info</span> {
|
||
<span class="ident">rocket</span>::<span class="ident">fairing</span>::<span class="ident">Info</span> {
|
||
<span class="ident">name</span>: <span class="string">"CORS"</span>,
|
||
<span class="ident">kind</span>: <span class="ident">rocket</span>::<span class="ident">fairing</span>::<span class="ident">Kind</span>::<span class="ident">Attach</span>
|
||
<span class="op">|</span> <span class="ident">rocket</span>::<span class="ident">fairing</span>::<span class="ident">Kind</span>::<span class="ident">Request</span>
|
||
<span class="op">|</span> <span class="ident">rocket</span>::<span class="ident">fairing</span>::<span class="ident">Kind</span>::<span class="ident">Response</span>,
|
||
}
|
||
}
|
||
|
||
<span class="kw">fn</span> <span class="ident">on_attach</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">rocket</span>: <span class="ident">rocket</span>::<span class="ident">Rocket</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">rocket</span>::<span class="ident">Rocket</span>, <span class="ident">rocket</span>::<span class="ident">Rocket</span><span class="op">></span> {
|
||
<span class="prelude-val">Ok</span>(<span class="ident">rocket</span>.<span class="ident">mount</span>(
|
||
<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">fairing_route_base</span>,
|
||
<span class="macro">vec</span><span class="macro">!</span>[<span class="ident">fairing_route</span>(<span class="self">self</span>.<span class="ident">fairing_route_rank</span>)],
|
||
))
|
||
}
|
||
|
||
<span class="kw">fn</span> <span class="ident">on_request</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">request</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Request</span><span class="op"><</span><span class="lifetime">'_</span><span class="op">></span>, <span class="kw">_</span>: <span class="kw-2">&</span><span class="ident">rocket</span>::<span class="ident">Data</span>) {
|
||
<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">validate</span>(<span class="self">self</span>, <span class="ident">request</span>) {
|
||
<span class="prelude-val">Ok</span>(<span class="kw">_</span>) <span class="op">=</span><span class="op">></span> <span class="ident">CorsValidation</span>::<span class="ident">Success</span>,
|
||
<span class="prelude-val">Err</span>(<span class="ident">err</span>) <span class="op">=</span><span class="op">></span> {
|
||
<span class="macro">error_</span><span class="macro">!</span>(<span class="string">"CORS Error: {}"</span>, <span class="ident">err</span>);
|
||
<span class="kw">let</span> <span class="ident">status</span> <span class="op">=</span> <span class="ident">err</span>.<span class="ident">status</span>();
|
||
<span class="ident">route_to_fairing_error_handler</span>(<span class="self">self</span>, <span class="ident">status</span>.<span class="ident">code</span>, <span class="ident">request</span>);
|
||
<span class="ident">CorsValidation</span>::<span class="ident">Failure</span>
|
||
}
|
||
};
|
||
|
||
<span class="kw">let</span> <span class="kw">_</span> <span class="op">=</span> <span class="ident">request</span>.<span class="ident">local_cache</span>(<span class="op">|</span><span class="op">|</span> <span class="ident">result</span>);
|
||
}
|
||
|
||
<span class="kw">fn</span> <span class="ident">on_response</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">request</span>: <span class="kw-2">&</span><span class="ident">Request</span><span class="op"><</span><span class="lifetime">'_</span><span class="op">></span>, <span class="ident">response</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">rocket</span>::<span class="ident">Response</span><span class="op"><</span><span class="lifetime">'_</span><span class="op">></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="ident">on_response_wrapper</span>(<span class="self">self</span>, <span class="ident">request</span>, <span class="ident">response</span>) {
|
||
<span class="macro">error_</span><span class="macro">!</span>(<span class="string">"Fairings on_response error: {}\nMost likely a bug"</span>, <span class="ident">err</span>);
|
||
<span class="ident">response</span>.<span class="ident">set_status</span>(<span class="ident">Status</span>::<span class="ident">InternalServerError</span>);
|
||
<span class="kw">let</span> <span class="kw">_</span> <span class="op">=</span> <span class="ident">response</span>.<span class="ident">take_body</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">rocket</span>::<span class="ident">http</span>::{<span class="ident">Method</span>, <span class="ident">Status</span>};
|
||
<span class="kw">use</span> <span class="ident">rocket</span>::<span class="ident">local</span>::<span class="ident">Client</span>;
|
||
<span class="kw">use</span> <span class="ident">rocket</span>::<span class="ident">Rocket</span>;
|
||
|
||
<span class="kw">use</span> <span class="kw">crate</span>::{<span class="ident">AllowedHeaders</span>, <span class="ident">AllowedOrigins</span>, <span class="ident">Cors</span>, <span class="ident">CorsOptions</span>};
|
||
|
||
<span class="kw">const</span> <span class="ident">CORS_ROOT</span>: <span class="kw-2">&</span><span class="ident">str</span> <span class="op">=</span> <span class="string">"/my_cors"</span>;
|
||
|
||
<span class="kw">fn</span> <span class="ident">make_cors_options</span>() <span class="op">-</span><span class="op">></span> <span class="ident">Cors</span> {
|
||
<span class="kw">let</span> <span class="ident">allowed_origins</span> <span class="op">=</span> <span class="ident">AllowedOrigins</span>::<span class="ident">some_exact</span>(<span class="kw-2">&</span>[<span class="string">"https://www.acme.com"</span>]);
|
||
|
||
<span class="ident">CorsOptions</span> {
|
||
<span class="ident">allowed_origins</span>,
|
||
<span class="ident">allowed_methods</span>: <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Method</span>::<span class="ident">Get</span>].<span class="ident">into_iter</span>().<span class="ident">map</span>(<span class="ident">From</span>::<span class="ident">from</span>).<span class="ident">collect</span>(),
|
||
<span class="ident">allowed_headers</span>: <span class="ident">AllowedHeaders</span>::<span class="ident">some</span>(<span class="kw-2">&</span>[<span class="string">"Authorization"</span>, <span class="string">"Accept"</span>]),
|
||
<span class="ident">allow_credentials</span>: <span class="bool-val">true</span>,
|
||
<span class="ident">fairing_route_base</span>: <span class="ident">CORS_ROOT</span>.<span class="ident">to_string</span>(),
|
||
|
||
..<span class="ident">Default</span>::<span class="ident">default</span>()
|
||
}
|
||
.<span class="ident">to_cors</span>()
|
||
.<span class="ident">expect</span>(<span class="string">"Not to fail"</span>)
|
||
}
|
||
|
||
<span class="kw">fn</span> <span class="ident">rocket</span>(<span class="ident">fairing</span>: <span class="ident">Cors</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Rocket</span> {
|
||
<span class="ident">Rocket</span>::<span class="ident">ignite</span>().<span class="ident">attach</span>(<span class="ident">fairing</span>)
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">fairing_error_route_returns_passed_in_status</span>() {
|
||
<span class="kw">let</span> <span class="ident">client</span> <span class="op">=</span> <span class="ident">Client</span>::<span class="ident">new</span>(<span class="ident">rocket</span>(<span class="ident">make_cors_options</span>())).<span class="ident">expect</span>(<span class="string">"to not fail"</span>);
|
||
<span class="kw">let</span> <span class="ident">request</span> <span class="op">=</span> <span class="ident">client</span>.<span class="ident">get</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}/403"</span>, <span class="ident">CORS_ROOT</span>));
|
||
<span class="kw">let</span> <span class="ident">response</span> <span class="op">=</span> <span class="ident">request</span>.<span class="ident">dispatch</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Status</span>::<span class="ident">Forbidden</span>, <span class="ident">response</span>.<span class="ident">status</span>());
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">fairing_error_route_returns_500_for_unknown_status</span>() {
|
||
<span class="kw">let</span> <span class="ident">client</span> <span class="op">=</span> <span class="ident">Client</span>::<span class="ident">new</span>(<span class="ident">rocket</span>(<span class="ident">make_cors_options</span>())).<span class="ident">expect</span>(<span class="string">"to not fail"</span>);
|
||
<span class="kw">let</span> <span class="ident">request</span> <span class="op">=</span> <span class="ident">client</span>.<span class="ident">get</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}/999"</span>, <span class="ident">CORS_ROOT</span>));
|
||
<span class="kw">let</span> <span class="ident">response</span> <span class="op">=</span> <span class="ident">request</span>.<span class="ident">dispatch</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Status</span>::<span class="ident">InternalServerError</span>, <span class="ident">response</span>.<span class="ident">status</span>());
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">error_route_is_mounted_on_attach</span>() {
|
||
<span class="kw">let</span> <span class="ident">rocket</span> <span class="op">=</span> <span class="ident">rocket</span>(<span class="ident">make_cors_options</span>());
|
||
|
||
<span class="kw">let</span> <span class="ident">expected_uri</span> <span class="op">=</span> <span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}/<status>"</span>, <span class="ident">CORS_ROOT</span>);
|
||
<span class="kw">let</span> <span class="ident">error_route</span> <span class="op">=</span> <span class="ident">rocket</span>
|
||
.<span class="ident">routes</span>()
|
||
.<span class="ident">find</span>(<span class="op">|</span><span class="ident">r</span><span class="op">|</span> <span class="ident">r</span>.<span class="ident">method</span> <span class="op">=</span><span class="op">=</span> <span class="ident">Method</span>::<span class="ident">Get</span> <span class="kw-2">&</span><span class="op">&</span> <span class="ident">r</span>.<span class="ident">uri</span>.<span class="ident">to_string</span>() <span class="op">=</span><span class="op">=</span> <span class="ident">expected_uri</span>);
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">error_route</span>.<span class="ident">is_some</span>());
|
||
}
|
||
|
||
<span class="comment">// Rest of the things can only be tested in integration tests</span>
|
||
}
|
||
</pre></div>
|
||
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