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</pre><pre class="rust ">
<span class="comment">// Copyright 2017 LambdaStack All rights reserved.</span>
<span class="comment">//</span>
<span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span>
<span class="comment">// you may not use this file except in compliance with the License.</span>
<span class="comment">// You may obtain a copy of the License at</span>
<span class="comment">//</span>
<span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span>
<span class="comment">//</span>
<span class="comment">// Unless required by applicable law or agreed to in writing, software</span>
<span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span>
<span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
<span class="comment">// See the License for the specific language governing permissions and</span>
<span class="comment">// limitations under the License.</span>
<span class="comment">// Portions borrowed from the rusoto project. See README.md</span>
<span class="doccomment">//! Library Documentation</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! AWS API requests.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! Wraps the Hyper library to send PUT, POST, DELETE and GET requests.</span>
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="ident">Read</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="ident">Error</span> <span class="kw">as</span> <span class="ident">IoError</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">error</span>::<span class="ident">Error</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::<span class="ident">HashMap</span>;
<span class="kw">use</span> <span class="ident">hyper</span>::<span class="ident">Client</span>;
<span class="kw">use</span> <span class="ident">hyper</span>::<span class="ident">Error</span> <span class="kw">as</span> <span class="ident">HyperError</span>;
<span class="kw">use</span> <span class="ident">hyper</span>::<span class="ident">header</span>::<span class="ident">Headers</span>;
<span class="kw">use</span> <span class="ident">hyper</span>::<span class="ident">method</span>::<span class="ident">Method</span>;
<span class="kw">use</span> <span class="ident">aws</span>::<span class="ident">common</span>::<span class="ident">signature</span>::<span class="ident">SignedRequest</span>;
<span class="doccomment">/// Wraps the Hyper Response that comes back from AWS S3.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// All HTTP calls are sent from here.</span>
<span class="doccomment">///</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Default</span>, <span class="ident">RustcDecodable</span>, <span class="ident">RustcEncodable</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">HttpResponse</span> {
<span class="doccomment">/// HTTP status code</span>
<span class="kw">pub</span> <span class="ident">status</span>: <span class="ident">u16</span>,
<span class="doccomment">/// XML payload</span>
<span class="kw">pub</span> <span class="ident">body</span>: <span class="ident">String</span>,
<span class="kw">pub</span> <span class="ident">body_buffer</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span>, <span class="comment">//&'a[u8],</span>
<span class="comment">// used by the get_body function to return the correct slice...</span>
<span class="kw">pub</span> <span class="ident">is_body</span>: <span class="ident">bool</span>,
<span class="doccomment">/// Unsorted list of header attributes</span>
<span class="kw">pub</span> <span class="ident">headers</span>: <span class="ident">HashMap</span><span class="op"><</span><span class="ident">String</span>, <span class="ident">String</span><span class="op">></span>,
}
<span class="doccomment">/// HTTP Error returned from the DispatchSignedRequest Trait. It also implements the Error Trait.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Default</span>, <span class="ident">PartialEq</span>, <span class="ident">RustcDecodable</span>, <span class="ident">RustcEncodable</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">HttpDispatchError</span> {
<span class="ident">message</span>: <span class="ident">String</span>,
}
<span class="kw">impl</span> <span class="ident">Error</span> <span class="kw">for</span> <span class="ident">HttpDispatchError</span> {
<span class="kw">fn</span> <span class="ident">description</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="ident">str</span> {
<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">message</span>
}
}
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">HttpDispatchError</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"{}"</span>, <span class="self">self</span>.<span class="ident">message</span>)
}
}
<span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">HyperError</span><span class="op">></span> <span class="kw">for</span> <span class="ident">HttpDispatchError</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">err</span>: <span class="ident">HyperError</span>) <span class="op">-></span> <span class="ident">HttpDispatchError</span> {
<span class="ident">HttpDispatchError</span> { <span class="ident">message</span>: <span class="ident">err</span>.<span class="ident">description</span>().<span class="ident">to_string</span>() }
}
}
<span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">IoError</span><span class="op">></span> <span class="kw">for</span> <span class="ident">HttpDispatchError</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">err</span>: <span class="ident">IoError</span>) <span class="op">-></span> <span class="ident">HttpDispatchError</span> {
<span class="ident">HttpDispatchError</span> { <span class="ident">message</span>: <span class="ident">err</span>.<span class="ident">description</span>().<span class="ident">to_string</span>() }
}
}
<span class="doccomment">/// Trait that is added to the Hyper Client type. This is where ALL HTTP calls get sent from.</span>
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">DispatchSignedRequest</span> {
<span class="kw">fn</span> <span class="ident">dispatch</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">request</span>: <span class="kw-2">&</span><span class="ident">SignedRequest</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">HttpResponse</span>, <span class="ident">HttpDispatchError</span><span class="op">></span>;
}
<span class="kw">impl</span> <span class="ident">DispatchSignedRequest</span> <span class="kw">for</span> <span class="ident">Client</span> {
<span class="kw">fn</span> <span class="ident">dispatch</span>(<span class="kw-2">&</span><span class="self">self</span>,
<span class="ident">request</span>: <span class="kw-2">&</span><span class="ident">SignedRequest</span>
) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">HttpResponse</span>, <span class="ident">HttpDispatchError</span><span class="op">></span> {
<span class="kw">let</span> <span class="ident">hyper_method</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">request</span>.<span class="ident">method</span>().<span class="ident">as_ref</span>() {
<span class="string">"POST"</span> <span class="op">=></span> <span class="ident">Method</span>::<span class="ident">Post</span>,
<span class="string">"PUT"</span> <span class="op">=></span> <span class="ident">Method</span>::<span class="ident">Put</span>,
<span class="string">"DELETE"</span> <span class="op">=></span> <span class="ident">Method</span>::<span class="ident">Delete</span>,
<span class="string">"GET"</span> <span class="op">=></span> <span class="ident">Method</span>::<span class="ident">Get</span>,
<span class="string">"HEAD"</span> <span class="op">=></span> <span class="ident">Method</span>::<span class="ident">Head</span>,
<span class="ident">v</span> @ _ <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">HttpDispatchError</span> { <span class="ident">message</span>: <span class="macro">format</span><span class="macro">!</span>(<span class="string">"Unsupported HTTP verb {}"</span>, <span class="ident">v</span>) }),
};
<span class="comment">// translate the headers map to a format Hyper likes</span>
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">hyper_headers</span> <span class="op">=</span> <span class="ident">Headers</span>::<span class="ident">new</span>();
<span class="kw">for</span> <span class="ident">h</span> <span class="kw">in</span> <span class="ident">request</span>.<span class="ident">headers</span>().<span class="ident">iter</span>() {
<span class="ident">hyper_headers</span>.<span class="ident">set_raw</span>(<span class="ident">h</span>.<span class="number">0</span>.<span class="ident">to_owned</span>(), <span class="ident">h</span>.<span class="number">1</span>.<span class="ident">to_owned</span>());
}
<span class="kw">let</span> <span class="ident">epp</span> <span class="op">=</span> <span class="ident">request</span>.<span class="ident">endpoint</span>().<span class="ident">clone</span>().<span class="ident">endpoint</span>.<span class="ident">unwrap</span>().<span class="ident">port</span>();
<span class="kw">let</span> <span class="ident">port_str</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">epp</span> {
<span class="prelude-val">Some</span>(<span class="ident">port</span>) <span class="op">=></span> <span class="macro">format</span><span class="macro">!</span>(<span class="string">":{}"</span>, <span class="ident">port</span>),
_ <span class="op">=></span> <span class="string">""</span>.<span class="ident">to_string</span>(),
};
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">final_uri</span> <span class="op">=</span> <span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}://{}{}{}"</span>,
<span class="ident">request</span>.<span class="ident">endpoint_scheme</span>(),
<span class="ident">request</span>.<span class="ident">hostname</span>(),
<span class="ident">port_str</span>,
<span class="ident">request</span>.<span class="ident">path</span>());
<span class="kw">if</span> <span class="op">!</span><span class="ident">request</span>.<span class="ident">canonical_query_string</span>().<span class="ident">is_empty</span>() {
<span class="kw">let</span> <span class="ident">uri</span> <span class="op">=</span> <span class="ident">final_uri</span>.<span class="ident">clone</span>();
<span class="ident">final_uri</span> <span class="op">=</span> <span class="ident">final_uri</span> <span class="op">+</span> <span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}{}"</span>, <span class="kw">if</span> <span class="ident">uri</span>.<span class="ident">contains</span>(<span class="string">"?"</span>) {<span class="string">""</span>} <span class="kw">else</span> {<span class="string">"?"</span>}, <span class="ident">request</span>.<span class="ident">canonical_query_string</span>());
<span class="ident">final_uri</span> <span class="op">=</span> <span class="ident">final_uri</span>.<span class="ident">replace</span>(<span class="string">"?"</span>, <span class="kw-2">&</span><span class="ident">request</span>.<span class="ident">path_options</span>().<span class="ident">unwrap_or</span>(<span class="string">"?"</span>.<span class="ident">to_string</span>()));
} <span class="kw">else</span> {
<span class="ident">final_uri</span> <span class="op">=</span> <span class="ident">final_uri</span> <span class="op">+</span> <span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">request</span>.<span class="ident">path_options</span>().<span class="ident">unwrap_or</span>(<span class="string">""</span>.<span class="ident">to_string</span>()));
}
<span class="comment">// SENDS</span>
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">hyper_response</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">request</span>.<span class="ident">payload</span>() {
<span class="prelude-val">None</span> <span class="op">=></span> <span class="macro">try</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">request</span>(<span class="ident">hyper_method</span>, <span class="kw-2">&</span><span class="ident">final_uri</span>).<span class="ident">headers</span>(<span class="ident">hyper_headers</span>).<span class="ident">body</span>(<span class="string">""</span>).<span class="ident">send</span>()),
<span class="prelude-val">Some</span>(<span class="ident">payload_contents</span>) <span class="op">=></span> <span class="macro">try</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">request</span>(<span class="ident">hyper_method</span>, <span class="kw-2">&</span><span class="ident">final_uri</span>)
.<span class="ident">headers</span>(<span class="ident">hyper_headers</span>)
.<span class="ident">body</span>(<span class="ident">payload_contents</span>)
.<span class="ident">send</span>()),
};
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">headers</span>: <span class="ident">HashMap</span><span class="op"><</span><span class="ident">String</span>, <span class="ident">String</span><span class="op">></span> <span class="op">=</span> <span class="ident">HashMap</span>::<span class="ident">new</span>();
<span class="kw">for</span> <span class="ident">header</span> <span class="kw">in</span> <span class="ident">hyper_response</span>.<span class="ident">headers</span>.<span class="ident">iter</span>() {
<span class="ident">headers</span>.<span class="ident">insert</span>(<span class="ident">header</span>.<span class="ident">name</span>().<span class="ident">to_string</span>(), <span class="ident">header</span>.<span class="ident">value_string</span>());
}
<span class="comment">// The initial way was to string but UTF8 errors occured on certain object types so switched</span>
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">is_body</span> <span class="op">=</span> <span class="bool-val">true</span>;
<span class="comment">// NB: Should be a better way to do this for compressed or binary files but works.</span>
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buffer</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</span>::<span class="ident">new</span>();
<span class="kw">let</span> <span class="ident">body</span>:<span class="ident">String</span>;
<span class="kw">let</span> <span class="ident">size</span>: <span class="ident">usize</span>;
<span class="kw">match</span> <span class="ident">hyper_response</span>.<span class="ident">read_to_end</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buffer</span>) {
<span class="prelude-val">Ok</span>(<span class="ident">len</span>) <span class="op">=></span> {<span class="ident">size</span> <span class="op">=</span> <span class="ident">len</span>},
_ <span class="op">=></span> {<span class="ident">size</span> <span class="op">=</span> <span class="number">0</span> <span class="kw">as</span> <span class="ident">usize</span>},
}
<span class="kw">if</span> <span class="ident">size</span> <span class="op">></span> <span class="number">0</span> {
<span class="kw">match</span> <span class="ident">String</span>::<span class="ident">from_utf8</span>(<span class="ident">buffer</span>.<span class="ident">clone</span>()) {
<span class="prelude-val">Ok</span>(<span class="ident">buf</span>) <span class="op">=></span> {
<span class="ident">body</span> <span class="op">=</span> <span class="ident">buf</span>;
<span class="ident">buffer</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();
},
_ <span class="op">=></span> {
<span class="ident">body</span> <span class="op">=</span> <span class="ident">String</span>::<span class="ident">new</span>();
<span class="ident">is_body</span> <span class="op">=</span> <span class="bool-val">false</span>;
},
}
} <span class="kw">else</span> {
<span class="ident">body</span> <span class="op">=</span> <span class="ident">String</span>::<span class="ident">new</span>();
}
<span class="comment">// The HttpResponse also contains a body_buffer for large binaries mainly. Body is used</span>
<span class="comment">// most often. Typically, on get_object cares.</span>
<span class="comment">// Some bodies are XML and some are binary. Body is for String and body_buffer is for binary.</span>
<span class="prelude-val">Ok</span>(<span class="ident">HttpResponse</span> {
<span class="ident">status</span>: <span class="ident">hyper_response</span>.<span class="ident">status</span>.<span class="ident">to_u16</span>(),
<span class="ident">body</span>: <span class="ident">body</span>,
<span class="ident">body_buffer</span>: <span class="ident">buffer</span>,
<span class="ident">is_body</span>: <span class="ident">is_body</span>,
<span class="ident">headers</span>: <span class="ident">headers</span>,
})
}
}
</pre>
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