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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source to the Rust file `src/json.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>json.rs.html -- source</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script src="../../storage.js"></script></head><body class="rustdoc source"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><pre class="line-numbers"><span id="1"> 1</span>
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|
||
<span id="429">429</span>
|
||
<span id="430">430</span>
|
||
<span id="431">431</span>
|
||
<span id="432">432</span>
|
||
<span id="433">433</span>
|
||
<span id="434">434</span>
|
||
<span id="435">435</span>
|
||
<span id="436">436</span>
|
||
<span id="437">437</span>
|
||
<span id="438">438</span>
|
||
<span id="439">439</span>
|
||
<span id="440">440</span>
|
||
<span id="441">441</span>
|
||
<span id="442">442</span>
|
||
<span id="443">443</span>
|
||
</pre><pre class="rust ">
|
||
<span class="kw">use</span> <span class="ident">bytes</span>::<span class="ident">BytesMut</span>;
|
||
<span class="kw">use</span> <span class="ident">futures</span>::{<span class="ident">Future</span>, <span class="ident">Poll</span>, <span class="ident">Stream</span>};
|
||
<span class="kw">use</span> <span class="ident">http</span>::<span class="ident">header</span>::<span class="ident">CONTENT_LENGTH</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">ops</span>::{<span class="ident">Deref</span>, <span class="ident">DerefMut</span>};
|
||
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">rc</span>::<span class="ident">Rc</span>;
|
||
|
||
<span class="kw">use</span> <span class="ident">mime</span>;
|
||
<span class="kw">use</span> <span class="ident">serde</span>::<span class="ident">de</span>::<span class="ident">DeserializeOwned</span>;
|
||
<span class="kw">use</span> <span class="ident">serde</span>::<span class="ident">Serialize</span>;
|
||
<span class="kw">use</span> <span class="ident">serde_json</span>;
|
||
|
||
<span class="kw">use</span> <span class="ident">error</span>::{<span class="ident">Error</span>, <span class="ident">JsonPayloadError</span>};
|
||
<span class="kw">use</span> <span class="ident">handler</span>::{<span class="ident">FromRequest</span>, <span class="ident">Responder</span>};
|
||
<span class="kw">use</span> <span class="ident">http</span>::<span class="ident">StatusCode</span>;
|
||
<span class="kw">use</span> <span class="ident">httpmessage</span>::<span class="ident">HttpMessage</span>;
|
||
<span class="kw">use</span> <span class="ident">httprequest</span>::<span class="ident">HttpRequest</span>;
|
||
<span class="kw">use</span> <span class="ident">httpresponse</span>::<span class="ident">HttpResponse</span>;
|
||
|
||
<span class="doccomment">/// Json helper</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// Json can be used for two different purpose. First is for json response</span>
|
||
<span class="doccomment">/// generation and second is for extracting typed information from request's</span>
|
||
<span class="doccomment">/// payload.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// To extract typed information from request's body, the type `T` must</span>
|
||
<span class="doccomment">/// implement the `Deserialize` trait from *serde*.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// [**JsonConfig**](dev/struct.JsonConfig.html) allows to configure extraction</span>
|
||
<span class="doccomment">/// process.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// ## Example</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// ```rust</span>
|
||
<span class="doccomment">/// # extern crate actix_web;</span>
|
||
<span class="doccomment">/// #[macro_use] extern crate serde_derive;</span>
|
||
<span class="doccomment">/// use actix_web::{App, Json, Result, http};</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// #[derive(Deserialize)]</span>
|
||
<span class="doccomment">/// struct Info {</span>
|
||
<span class="doccomment">/// username: String,</span>
|
||
<span class="doccomment">/// }</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// /// deserialize `Info` from request's body</span>
|
||
<span class="doccomment">/// fn index(info: Json<Info>) -> Result<String> {</span>
|
||
<span class="doccomment">/// Ok(format!("Welcome {}!", info.username))</span>
|
||
<span class="doccomment">/// }</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// fn main() {</span>
|
||
<span class="doccomment">/// let app = App::new().resource(</span>
|
||
<span class="doccomment">/// "/index.html",</span>
|
||
<span class="doccomment">/// |r| r.method(http::Method::POST).with(index)); // <- use `with` extractor</span>
|
||
<span class="doccomment">/// }</span>
|
||
<span class="doccomment">/// ```</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// The `Json` type allows you to respond with well-formed JSON data: simply</span>
|
||
<span class="doccomment">/// return a value of type Json<T> where T is the type of a structure</span>
|
||
<span class="doccomment">/// to serialize into *JSON*. The type `T` must implement the `Serialize`</span>
|
||
<span class="doccomment">/// trait from *serde*.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// ```rust</span>
|
||
<span class="doccomment">/// # extern crate actix_web;</span>
|
||
<span class="doccomment">/// # #[macro_use] extern crate serde_derive;</span>
|
||
<span class="doccomment">/// # use actix_web::*;</span>
|
||
<span class="doccomment">/// #</span>
|
||
<span class="doccomment">/// #[derive(Serialize)]</span>
|
||
<span class="doccomment">/// struct MyObj {</span>
|
||
<span class="doccomment">/// name: String,</span>
|
||
<span class="doccomment">/// }</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// fn index(req: HttpRequest) -> Result<Json<MyObj>> {</span>
|
||
<span class="doccomment">/// Ok(Json(MyObj {</span>
|
||
<span class="doccomment">/// name: req.match_info().query("name")?,</span>
|
||
<span class="doccomment">/// }))</span>
|
||
<span class="doccomment">/// }</span>
|
||
<span class="doccomment">/// # fn main() {}</span>
|
||
<span class="doccomment">/// ```</span>
|
||
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Json</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>(<span class="kw">pub</span> <span class="ident">T</span>);
|
||
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">Json</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
|
||
<span class="doccomment">/// Deconstruct to an inner value</span>
|
||
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">into_inner</span>(<span class="self">self</span>) <span class="op">-></span> <span class="ident">T</span> {
|
||
<span class="self">self</span>.<span class="number">0</span>
|
||
}
|
||
}
|
||
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">Deref</span> <span class="kw">for</span> <span class="ident">Json</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
|
||
<span class="kw">type</span> <span class="ident">Target</span> <span class="op">=</span> <span class="ident">T</span>;
|
||
|
||
<span class="kw">fn</span> <span class="ident">deref</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="ident">T</span> {
|
||
<span class="kw-2">&</span><span class="self">self</span>.<span class="number">0</span>
|
||
}
|
||
}
|
||
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">DerefMut</span> <span class="kw">for</span> <span class="ident">Json</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
|
||
<span class="kw">fn</span> <span class="ident">deref_mut</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">T</span> {
|
||
<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>.<span class="number">0</span>
|
||
}
|
||
}
|
||
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Json</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>
|
||
<span class="kw">where</span>
|
||
<span class="ident">T</span>: <span class="ident">fmt</span>::<span class="ident">Debug</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">"Json: {:?}"</span>, <span class="self">self</span>.<span class="number">0</span>)
|
||
}
|
||
}
|
||
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">Json</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>
|
||
<span class="kw">where</span>
|
||
<span class="ident">T</span>: <span class="ident">fmt</span>::<span class="ident">Display</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="ident">fmt</span>::<span class="ident">Display</span>::<span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="number">0</span>, <span class="ident">f</span>)
|
||
}
|
||
}
|
||
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Serialize</span><span class="op">></span> <span class="ident">Responder</span> <span class="kw">for</span> <span class="ident">Json</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
|
||
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">HttpResponse</span>;
|
||
<span class="kw">type</span> <span class="ident">Error</span> <span class="op">=</span> <span class="ident">Error</span>;
|
||
|
||
<span class="kw">fn</span> <span class="ident">respond_to</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>(<span class="self">self</span>, <span class="ident">req</span>: <span class="kw-2">&</span><span class="ident">HttpRequest</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">HttpResponse</span>, <span class="ident">Error</span><span class="op">></span> {
|
||
<span class="kw">let</span> <span class="ident">body</span> <span class="op">=</span> <span class="ident">serde_json</span>::<span class="ident">to_string</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="number">0</span>)<span class="question-mark">?</span>;
|
||
|
||
<span class="prelude-val">Ok</span>(<span class="ident">req</span>
|
||
.<span class="ident">build_response</span>(<span class="ident">StatusCode</span>::<span class="ident">OK</span>)
|
||
.<span class="ident">content_type</span>(<span class="string">"application/json"</span>)
|
||
.<span class="ident">body</span>(<span class="ident">body</span>))
|
||
}
|
||
}
|
||
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">S</span><span class="op">></span> <span class="ident">FromRequest</span><span class="op"><</span><span class="ident">S</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Json</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>
|
||
<span class="kw">where</span>
|
||
<span class="ident">T</span>: <span class="ident">DeserializeOwned</span> <span class="op">+</span> <span class="lifetime">'static</span>,
|
||
<span class="ident">S</span>: <span class="lifetime">'static</span>,
|
||
{
|
||
<span class="kw">type</span> <span class="ident">Config</span> <span class="op">=</span> <span class="ident">JsonConfig</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>;
|
||
<span class="kw">type</span> <span class="prelude-ty">Result</span> <span class="op">=</span> <span class="ident">Box</span><span class="op"><</span><span class="ident">Future</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="self">Self</span>, <span class="ident">Error</span> <span class="op">=</span> <span class="ident">Error</span><span class="op">>></span>;
|
||
|
||
<span class="attribute">#[<span class="ident">inline</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">from_request</span>(<span class="ident">req</span>: <span class="kw-2">&</span><span class="ident">HttpRequest</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>, <span class="ident">cfg</span>: <span class="kw-2">&</span><span class="self">Self</span>::<span class="ident">Config</span>) <span class="op">-></span> <span class="self">Self</span>::<span class="prelude-ty">Result</span> {
|
||
<span class="kw">let</span> <span class="ident">req2</span> <span class="op">=</span> <span class="ident">req</span>.<span class="ident">clone</span>();
|
||
<span class="kw">let</span> <span class="ident">err</span> <span class="op">=</span> <span class="ident">Rc</span>::<span class="ident">clone</span>(<span class="kw-2">&</span><span class="ident">cfg</span>.<span class="ident">ehandler</span>);
|
||
<span class="ident">Box</span>::<span class="ident">new</span>(
|
||
<span class="ident">JsonBody</span>::<span class="ident">new</span>(<span class="ident">req</span>)
|
||
.<span class="ident">limit</span>(<span class="ident">cfg</span>.<span class="ident">limit</span>)
|
||
.<span class="ident">map_err</span>(<span class="kw">move</span> <span class="op">|</span><span class="ident">e</span><span class="op">|</span> (<span class="kw-2">*</span><span class="ident">err</span>)(<span class="ident">e</span>, <span class="kw-2">&</span><span class="ident">req2</span>))
|
||
.<span class="ident">map</span>(<span class="ident">Json</span>),
|
||
)
|
||
}
|
||
}
|
||
|
||
<span class="doccomment">/// Json extractor configuration</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// ```rust</span>
|
||
<span class="doccomment">/// # extern crate actix_web;</span>
|
||
<span class="doccomment">/// #[macro_use] extern crate serde_derive;</span>
|
||
<span class="doccomment">/// use actix_web::{error, http, App, HttpResponse, Json, Result};</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// #[derive(Deserialize)]</span>
|
||
<span class="doccomment">/// struct Info {</span>
|
||
<span class="doccomment">/// username: String,</span>
|
||
<span class="doccomment">/// }</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// /// deserialize `Info` from request's body, max payload size is 4kb</span>
|
||
<span class="doccomment">/// fn index(info: Json<Info>) -> Result<String> {</span>
|
||
<span class="doccomment">/// Ok(format!("Welcome {}!", info.username))</span>
|
||
<span class="doccomment">/// }</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// fn main() {</span>
|
||
<span class="doccomment">/// let app = App::new().resource("/index.html", |r| {</span>
|
||
<span class="doccomment">/// r.method(http::Method::POST)</span>
|
||
<span class="doccomment">/// .with_config(index, |cfg| {</span>
|
||
<span class="doccomment">/// cfg.0.limit(4096) // <- change json extractor configuration</span>
|
||
<span class="doccomment">/// .error_handler(|err, req| { // <- create custom error response</span>
|
||
<span class="doccomment">/// error::InternalError::from_response(</span>
|
||
<span class="doccomment">/// err, HttpResponse::Conflict().finish()).into()</span>
|
||
<span class="doccomment">/// });</span>
|
||
<span class="doccomment">/// })</span>
|
||
<span class="doccomment">/// });</span>
|
||
<span class="doccomment">/// }</span>
|
||
<span class="doccomment">/// ```</span>
|
||
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">JsonConfig</span><span class="op"><</span><span class="ident">S</span><span class="op">></span> {
|
||
<span class="ident">limit</span>: <span class="ident">usize</span>,
|
||
<span class="ident">ehandler</span>: <span class="ident">Rc</span><span class="op"><</span><span class="ident">Fn</span>(<span class="ident">JsonPayloadError</span>, <span class="kw-2">&</span><span class="ident">HttpRequest</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>) <span class="op">-></span> <span class="ident">Error</span><span class="op">></span>,
|
||
}
|
||
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">S</span><span class="op">></span> <span class="ident">JsonConfig</span><span class="op"><</span><span class="ident">S</span><span class="op">></span> {
|
||
<span class="doccomment">/// Change max size of payload. By default max size is 256Kb</span>
|
||
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">limit</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">limit</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">Self</span> {
|
||
<span class="self">self</span>.<span class="ident">limit</span> <span class="op">=</span> <span class="ident">limit</span>;
|
||
<span class="self">self</span>
|
||
}
|
||
|
||
<span class="doccomment">/// Set custom error handler</span>
|
||
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">error_handler</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">Self</span>
|
||
<span class="kw">where</span>
|
||
<span class="ident">F</span>: <span class="ident">Fn</span>(<span class="ident">JsonPayloadError</span>, <span class="kw-2">&</span><span class="ident">HttpRequest</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>) <span class="op">-></span> <span class="ident">Error</span> <span class="op">+</span> <span class="lifetime">'static</span>,
|
||
{
|
||
<span class="self">self</span>.<span class="ident">ehandler</span> <span class="op">=</span> <span class="ident">Rc</span>::<span class="ident">new</span>(<span class="ident">f</span>);
|
||
<span class="self">self</span>
|
||
}
|
||
}
|
||
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">S</span><span class="op">></span> <span class="ident">Default</span> <span class="kw">for</span> <span class="ident">JsonConfig</span><span class="op"><</span><span class="ident">S</span><span class="op">></span> {
|
||
<span class="kw">fn</span> <span class="ident">default</span>() <span class="op">-></span> <span class="self">Self</span> {
|
||
<span class="ident">JsonConfig</span> {
|
||
<span class="ident">limit</span>: <span class="number">262_144</span>,
|
||
<span class="ident">ehandler</span>: <span class="ident">Rc</span>::<span class="ident">new</span>(<span class="op">|</span><span class="ident">e</span>, <span class="kw">_</span><span class="op">|</span> <span class="ident">e</span>.<span class="ident">into</span>()),
|
||
}
|
||
}
|
||
}
|
||
|
||
<span class="doccomment">/// Request payload json parser that resolves to a deserialized `T` value.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// Returns error:</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// * content type is not `application/json`</span>
|
||
<span class="doccomment">/// * content length is greater than 256k</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// # Server example</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// ```rust</span>
|
||
<span class="doccomment">/// # extern crate actix_web;</span>
|
||
<span class="doccomment">/// # extern crate futures;</span>
|
||
<span class="doccomment">/// # #[macro_use] extern crate serde_derive;</span>
|
||
<span class="doccomment">/// use actix_web::{AsyncResponder, Error, HttpMessage, HttpRequest, HttpResponse};</span>
|
||
<span class="doccomment">/// use futures::future::Future;</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// #[derive(Deserialize, Debug)]</span>
|
||
<span class="doccomment">/// struct MyObj {</span>
|
||
<span class="doccomment">/// name: String,</span>
|
||
<span class="doccomment">/// }</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// fn index(mut req: HttpRequest) -> Box<Future<Item = HttpResponse, Error = Error>> {</span>
|
||
<span class="doccomment">/// req.json() // <- get JsonBody future</span>
|
||
<span class="doccomment">/// .from_err()</span>
|
||
<span class="doccomment">/// .and_then(|val: MyObj| { // <- deserialized value</span>
|
||
<span class="doccomment">/// println!("==== BODY ==== {:?}", val);</span>
|
||
<span class="doccomment">/// Ok(HttpResponse::Ok().into())</span>
|
||
<span class="doccomment">/// }).responder()</span>
|
||
<span class="doccomment">/// }</span>
|
||
<span class="doccomment">/// # fn main() {}</span>
|
||
<span class="doccomment">/// ```</span>
|
||
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">JsonBody</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">HttpMessage</span>, <span class="ident">U</span>: <span class="ident">DeserializeOwned</span><span class="op">></span> {
|
||
<span class="ident">limit</span>: <span class="ident">usize</span>,
|
||
<span class="ident">length</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>,
|
||
<span class="ident">stream</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">T</span>::<span class="ident">Stream</span><span class="op">></span>,
|
||
<span class="ident">err</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">JsonPayloadError</span><span class="op">></span>,
|
||
<span class="ident">fut</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Box</span><span class="op"><</span><span class="ident">Future</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="ident">U</span>, <span class="ident">Error</span> <span class="op">=</span> <span class="ident">JsonPayloadError</span><span class="op">>></span><span class="op">></span>,
|
||
}
|
||
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">HttpMessage</span>, <span class="ident">U</span>: <span class="ident">DeserializeOwned</span><span class="op">></span> <span class="ident">JsonBody</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">U</span><span class="op">></span> {
|
||
<span class="doccomment">/// Create `JsonBody` for request.</span>
|
||
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">req</span>: <span class="kw-2">&</span><span class="ident">T</span>) <span class="op">-></span> <span class="self">Self</span> {
|
||
<span class="comment">// check content-type</span>
|
||
<span class="kw">let</span> <span class="ident">json</span> <span class="op">=</span> <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(<span class="ident">mime</span>)) <span class="op">=</span> <span class="ident">req</span>.<span class="ident">mime_type</span>() {
|
||
<span class="ident">mime</span>.<span class="ident">subtype</span>() <span class="op">==</span> <span class="ident">mime</span>::<span class="ident">JSON</span> <span class="op">||</span> <span class="ident">mime</span>.<span class="ident">suffix</span>() <span class="op">==</span> <span class="prelude-val">Some</span>(<span class="ident">mime</span>::<span class="ident">JSON</span>)
|
||
} <span class="kw">else</span> {
|
||
<span class="bool-val">false</span>
|
||
};
|
||
<span class="kw">if</span> <span class="op">!</span><span class="ident">json</span> {
|
||
<span class="kw">return</span> <span class="ident">JsonBody</span> {
|
||
<span class="ident">limit</span>: <span class="number">262_144</span>,
|
||
<span class="ident">length</span>: <span class="prelude-val">None</span>,
|
||
<span class="ident">stream</span>: <span class="prelude-val">None</span>,
|
||
<span class="ident">fut</span>: <span class="prelude-val">None</span>,
|
||
<span class="ident">err</span>: <span class="prelude-val">Some</span>(<span class="ident">JsonPayloadError</span>::<span class="ident">ContentType</span>),
|
||
};
|
||
}
|
||
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">len</span> <span class="op">=</span> <span class="prelude-val">None</span>;
|
||
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">l</span>) <span class="op">=</span> <span class="ident">req</span>.<span class="ident">headers</span>().<span class="ident">get</span>(<span class="ident">CONTENT_LENGTH</span>) {
|
||
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">s</span>) <span class="op">=</span> <span class="ident">l</span>.<span class="ident">to_str</span>() {
|
||
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">l</span>) <span class="op">=</span> <span class="ident">s</span>.<span class="ident">parse</span>::<span class="op"><</span><span class="ident">usize</span><span class="op">></span>() {
|
||
<span class="ident">len</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">l</span>)
|
||
}
|
||
}
|
||
}
|
||
|
||
<span class="ident">JsonBody</span> {
|
||
<span class="ident">limit</span>: <span class="number">262_144</span>,
|
||
<span class="ident">length</span>: <span class="ident">len</span>,
|
||
<span class="ident">stream</span>: <span class="prelude-val">Some</span>(<span class="ident">req</span>.<span class="ident">payload</span>()),
|
||
<span class="ident">fut</span>: <span class="prelude-val">None</span>,
|
||
<span class="ident">err</span>: <span class="prelude-val">None</span>,
|
||
}
|
||
}
|
||
|
||
<span class="doccomment">/// Change max size of payload. By default max size is 256Kb</span>
|
||
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">limit</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">limit</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="self">Self</span> {
|
||
<span class="self">self</span>.<span class="ident">limit</span> <span class="op">=</span> <span class="ident">limit</span>;
|
||
<span class="self">self</span>
|
||
}
|
||
}
|
||
|
||
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">HttpMessage</span> <span class="op">+</span> <span class="lifetime">'static</span>, <span class="ident">U</span>: <span class="ident">DeserializeOwned</span> <span class="op">+</span> <span class="lifetime">'static</span><span class="op">></span> <span class="ident">Future</span> <span class="kw">for</span> <span class="ident">JsonBody</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">U</span><span class="op">></span> {
|
||
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">U</span>;
|
||
<span class="kw">type</span> <span class="ident">Error</span> <span class="op">=</span> <span class="ident">JsonPayloadError</span>;
|
||
|
||
<span class="kw">fn</span> <span class="ident">poll</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">Poll</span><span class="op"><</span><span class="ident">U</span>, <span class="ident">JsonPayloadError</span><span class="op">></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="kw-2">mut</span> <span class="ident">fut</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">fut</span> {
|
||
<span class="kw">return</span> <span class="ident">fut</span>.<span class="ident">poll</span>();
|
||
}
|
||
|
||
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">err</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">err</span>.<span class="ident">take</span>() {
|
||
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">err</span>);
|
||
}
|
||
|
||
<span class="kw">let</span> <span class="ident">limit</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">limit</span>;
|
||
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">len</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">length</span>.<span class="ident">take</span>() {
|
||
<span class="kw">if</span> <span class="ident">len</span> <span class="op">></span> <span class="ident">limit</span> {
|
||
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">JsonPayloadError</span>::<span class="ident">Overflow</span>);
|
||
}
|
||
}
|
||
|
||
<span class="kw">let</span> <span class="ident">fut</span> <span class="op">=</span> <span class="self">self</span>
|
||
.<span class="ident">stream</span>
|
||
.<span class="ident">take</span>()
|
||
.<span class="ident">expect</span>(<span class="string">"JsonBody could not be used second time"</span>)
|
||
.<span class="ident">from_err</span>()
|
||
.<span class="ident">fold</span>(<span class="ident">BytesMut</span>::<span class="ident">with_capacity</span>(<span class="number">8192</span>), <span class="kw">move</span> <span class="op">|</span><span class="kw-2">mut</span> <span class="ident">body</span>, <span class="ident">chunk</span><span class="op">|</span> {
|
||
<span class="kw">if</span> (<span class="ident">body</span>.<span class="ident">len</span>() <span class="op">+</span> <span class="ident">chunk</span>.<span class="ident">len</span>()) <span class="op">></span> <span class="ident">limit</span> {
|
||
<span class="prelude-val">Err</span>(<span class="ident">JsonPayloadError</span>::<span class="ident">Overflow</span>)
|
||
} <span class="kw">else</span> {
|
||
<span class="ident">body</span>.<span class="ident">extend_from_slice</span>(<span class="kw-2">&</span><span class="ident">chunk</span>);
|
||
<span class="prelude-val">Ok</span>(<span class="ident">body</span>)
|
||
}
|
||
}).<span class="ident">and_then</span>(<span class="op">|</span><span class="ident">body</span><span class="op">|</span> <span class="prelude-val">Ok</span>(<span class="ident">serde_json</span>::<span class="ident">from_slice</span>::<span class="op"><</span><span class="ident">U</span><span class="op">></span>(<span class="kw-2">&</span><span class="ident">body</span>)<span class="question-mark">?</span>));
|
||
<span class="self">self</span>.<span class="ident">fut</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">Box</span>::<span class="ident">new</span>(<span class="ident">fut</span>));
|
||
<span class="self">self</span>.<span class="ident">poll</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="kw">super</span>::<span class="kw-2">*</span>;
|
||
<span class="kw">use</span> <span class="ident">bytes</span>::<span class="ident">Bytes</span>;
|
||
<span class="kw">use</span> <span class="ident">futures</span>::<span class="ident">Async</span>;
|
||
<span class="kw">use</span> <span class="ident">http</span>::<span class="ident">header</span>;
|
||
|
||
<span class="kw">use</span> <span class="ident">handler</span>::<span class="ident">Handler</span>;
|
||
<span class="kw">use</span> <span class="ident">test</span>::<span class="ident">TestRequest</span>;
|
||
<span class="kw">use</span> <span class="ident">with</span>::<span class="ident">With</span>;
|
||
|
||
<span class="kw">impl</span> <span class="ident">PartialEq</span> <span class="kw">for</span> <span class="ident">JsonPayloadError</span> {
|
||
<span class="kw">fn</span> <span class="ident">eq</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="ident">JsonPayloadError</span>) <span class="op">-></span> <span class="ident">bool</span> {
|
||
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
|
||
<span class="ident">JsonPayloadError</span>::<span class="ident">Overflow</span> <span class="op">=></span> <span class="kw">match</span> <span class="kw-2">*</span><span class="ident">other</span> {
|
||
<span class="ident">JsonPayloadError</span>::<span class="ident">Overflow</span> <span class="op">=></span> <span class="bool-val">true</span>,
|
||
<span class="kw">_</span> <span class="op">=></span> <span class="bool-val">false</span>,
|
||
},
|
||
<span class="ident">JsonPayloadError</span>::<span class="ident">ContentType</span> <span class="op">=></span> <span class="kw">match</span> <span class="kw-2">*</span><span class="ident">other</span> {
|
||
<span class="ident">JsonPayloadError</span>::<span class="ident">ContentType</span> <span class="op">=></span> <span class="bool-val">true</span>,
|
||
<span class="kw">_</span> <span class="op">=></span> <span class="bool-val">false</span>,
|
||
},
|
||
<span class="kw">_</span> <span class="op">=></span> <span class="bool-val">false</span>,
|
||
}
|
||
}
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>, <span class="ident">Deserialize</span>, <span class="ident">PartialEq</span>, <span class="ident">Debug</span>)]</span>
|
||
<span class="kw">struct</span> <span class="ident">MyObject</span> {
|
||
<span class="ident">name</span>: <span class="ident">String</span>,
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">test_json</span>() {
|
||
<span class="kw">let</span> <span class="ident">json</span> <span class="op">=</span> <span class="ident">Json</span>(<span class="ident">MyObject</span> {
|
||
<span class="ident">name</span>: <span class="string">"test"</span>.<span class="ident">to_owned</span>(),
|
||
});
|
||
<span class="kw">let</span> <span class="ident">resp</span> <span class="op">=</span> <span class="ident">json</span>.<span class="ident">respond_to</span>(<span class="kw-2">&</span><span class="ident">TestRequest</span>::<span class="ident">default</span>().<span class="ident">finish</span>()).<span class="ident">unwrap</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(
|
||
<span class="ident">resp</span>.<span class="ident">headers</span>().<span class="ident">get</span>(<span class="ident">header</span>::<span class="ident">CONTENT_TYPE</span>).<span class="ident">unwrap</span>(),
|
||
<span class="string">"application/json"</span>
|
||
);
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">test_json_body</span>() {
|
||
<span class="kw">let</span> <span class="ident">req</span> <span class="op">=</span> <span class="ident">TestRequest</span>::<span class="ident">default</span>().<span class="ident">finish</span>();
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">json</span> <span class="op">=</span> <span class="ident">req</span>.<span class="ident">json</span>::<span class="op"><</span><span class="ident">MyObject</span><span class="op">></span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">json</span>.<span class="ident">poll</span>().<span class="ident">err</span>().<span class="ident">unwrap</span>(), <span class="ident">JsonPayloadError</span>::<span class="ident">ContentType</span>);
|
||
|
||
<span class="kw">let</span> <span class="ident">req</span> <span class="op">=</span> <span class="ident">TestRequest</span>::<span class="ident">default</span>()
|
||
.<span class="ident">header</span>(
|
||
<span class="ident">header</span>::<span class="ident">CONTENT_TYPE</span>,
|
||
<span class="ident">header</span>::<span class="ident">HeaderValue</span>::<span class="ident">from_static</span>(<span class="string">"application/text"</span>),
|
||
).<span class="ident">finish</span>();
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">json</span> <span class="op">=</span> <span class="ident">req</span>.<span class="ident">json</span>::<span class="op"><</span><span class="ident">MyObject</span><span class="op">></span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">json</span>.<span class="ident">poll</span>().<span class="ident">err</span>().<span class="ident">unwrap</span>(), <span class="ident">JsonPayloadError</span>::<span class="ident">ContentType</span>);
|
||
|
||
<span class="kw">let</span> <span class="ident">req</span> <span class="op">=</span> <span class="ident">TestRequest</span>::<span class="ident">default</span>()
|
||
.<span class="ident">header</span>(
|
||
<span class="ident">header</span>::<span class="ident">CONTENT_TYPE</span>,
|
||
<span class="ident">header</span>::<span class="ident">HeaderValue</span>::<span class="ident">from_static</span>(<span class="string">"application/json"</span>),
|
||
).<span class="ident">header</span>(
|
||
<span class="ident">header</span>::<span class="ident">CONTENT_LENGTH</span>,
|
||
<span class="ident">header</span>::<span class="ident">HeaderValue</span>::<span class="ident">from_static</span>(<span class="string">"10000"</span>),
|
||
).<span class="ident">finish</span>();
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">json</span> <span class="op">=</span> <span class="ident">req</span>.<span class="ident">json</span>::<span class="op"><</span><span class="ident">MyObject</span><span class="op">></span>().<span class="ident">limit</span>(<span class="number">100</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">json</span>.<span class="ident">poll</span>().<span class="ident">err</span>().<span class="ident">unwrap</span>(), <span class="ident">JsonPayloadError</span>::<span class="ident">Overflow</span>);
|
||
|
||
<span class="kw">let</span> <span class="ident">req</span> <span class="op">=</span> <span class="ident">TestRequest</span>::<span class="ident">default</span>()
|
||
.<span class="ident">header</span>(
|
||
<span class="ident">header</span>::<span class="ident">CONTENT_TYPE</span>,
|
||
<span class="ident">header</span>::<span class="ident">HeaderValue</span>::<span class="ident">from_static</span>(<span class="string">"application/json"</span>),
|
||
).<span class="ident">header</span>(
|
||
<span class="ident">header</span>::<span class="ident">CONTENT_LENGTH</span>,
|
||
<span class="ident">header</span>::<span class="ident">HeaderValue</span>::<span class="ident">from_static</span>(<span class="string">"16"</span>),
|
||
).<span class="ident">set_payload</span>(<span class="ident">Bytes</span>::<span class="ident">from_static</span>(<span class="string">b"{\"name\": \"test\"}"</span>))
|
||
.<span class="ident">finish</span>();
|
||
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">json</span> <span class="op">=</span> <span class="ident">req</span>.<span class="ident">json</span>::<span class="op"><</span><span class="ident">MyObject</span><span class="op">></span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(
|
||
<span class="ident">json</span>.<span class="ident">poll</span>().<span class="ident">ok</span>().<span class="ident">unwrap</span>(),
|
||
<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="ident">MyObject</span> {
|
||
<span class="ident">name</span>: <span class="string">"test"</span>.<span class="ident">to_owned</span>()
|
||
})
|
||
);
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">test_with_json</span>() {
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">cfg</span> <span class="op">=</span> <span class="ident">JsonConfig</span>::<span class="ident">default</span>();
|
||
<span class="ident">cfg</span>.<span class="ident">limit</span>(<span class="number">4096</span>);
|
||
<span class="kw">let</span> <span class="ident">handler</span> <span class="op">=</span> <span class="ident">With</span>::<span class="ident">new</span>(<span class="op">|</span><span class="ident">data</span>: <span class="ident">Json</span><span class="op"><</span><span class="ident">MyObject</span><span class="op">></span><span class="op">|</span> <span class="ident">data</span>, <span class="ident">cfg</span>);
|
||
|
||
<span class="kw">let</span> <span class="ident">req</span> <span class="op">=</span> <span class="ident">TestRequest</span>::<span class="ident">default</span>().<span class="ident">finish</span>();
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">handler</span>.<span class="ident">handle</span>(<span class="kw-2">&</span><span class="ident">req</span>).<span class="ident">as_err</span>().<span class="ident">is_some</span>());
|
||
|
||
<span class="kw">let</span> <span class="ident">req</span> <span class="op">=</span> <span class="ident">TestRequest</span>::<span class="ident">with_header</span>(
|
||
<span class="ident">header</span>::<span class="ident">CONTENT_TYPE</span>,
|
||
<span class="ident">header</span>::<span class="ident">HeaderValue</span>::<span class="ident">from_static</span>(<span class="string">"application/json"</span>),
|
||
).<span class="ident">header</span>(
|
||
<span class="ident">header</span>::<span class="ident">CONTENT_LENGTH</span>,
|
||
<span class="ident">header</span>::<span class="ident">HeaderValue</span>::<span class="ident">from_static</span>(<span class="string">"16"</span>),
|
||
).<span class="ident">set_payload</span>(<span class="ident">Bytes</span>::<span class="ident">from_static</span>(<span class="string">b"{\"name\": \"test\"}"</span>))
|
||
.<span class="ident">finish</span>();
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">handler</span>.<span class="ident">handle</span>(<span class="kw-2">&</span><span class="ident">req</span>).<span class="ident">as_err</span>().<span class="ident">is_none</span>())
|
||
}
|
||
}
|
||
</pre>
|
||
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