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<!DOCTYPE html> <html lang="en"> <head> <title>DataResponse Structure Reference</title> <link rel="stylesheet" type="text/css" href="../css/jazzy.css" /> <link rel="stylesheet" type="text/css" href="../css/highlight.css" /> <meta charset="utf-8"> <script src="../js/jquery.min.js" defer></script> <script src="../js/jazzy.js" defer></script> <script src="../js/lunr.min.js" defer></script> <script src="../js/typeahead.jquery.js" defer></script> <script src="../js/jazzy.search.js" defer></script> </head> <body> <a name="//apple_ref/swift/Struct/DataResponse" class="dashAnchor"></a> <a title="DataResponse Structure Reference"></a> <header class="header"> <p class="header-col header-col--primary"> <a class="header-link" href="../index.html"> Alamofire Docs </a> (86% documented) </p> <p class="header-col--secondary"> <form role="search" action="../search.json"> <input type="text" placeholder="Search documentation" data-typeahead> </form> </p> <p class="header-col header-col--secondary"> <a 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href="../Structs/DataResponse.html">DataResponse</a> </li> <li class="nav-group-task"> <a class="nav-group-task-link" href="../Structs/DataResponseSerializer.html">DataResponseSerializer</a> </li> <li class="nav-group-task"> <a class="nav-group-task-link" href="../Structs/DefaultDataResponse.html">DefaultDataResponse</a> </li> <li class="nav-group-task"> <a class="nav-group-task-link" href="../Structs/DefaultDownloadResponse.html">DefaultDownloadResponse</a> </li> <li class="nav-group-task"> <a class="nav-group-task-link" href="../Structs/DownloadResponse.html">DownloadResponse</a> </li> <li class="nav-group-task"> <a class="nav-group-task-link" href="../Structs/DownloadResponseSerializer.html">DownloadResponseSerializer</a> </li> <li class="nav-group-task"> <a class="nav-group-task-link" href="../Structs/JSONEncoding.html">JSONEncoding</a> </li> <li class="nav-group-task"> <a class="nav-group-task-link" href="../Structs/PropertyListEncoding.html">PropertyListEncoding</a> </li> <li class="nav-group-task"> <a class="nav-group-task-link" href="../Structs/Timeline.html">Timeline</a> </li> <li class="nav-group-task"> <a class="nav-group-task-link" href="../Structs/URLEncoding.html">URLEncoding</a> </li> <li class="nav-group-task"> <a class="nav-group-task-link" href="../Structs/URLEncoding/Destination.html">– Destination</a> </li> <li class="nav-group-task"> <a class="nav-group-task-link" href="../Structs/URLEncoding/ArrayEncoding.html">– ArrayEncoding</a> </li> <li class="nav-group-task"> <a class="nav-group-task-link" href="../Structs/URLEncoding/BoolEncoding.html">– BoolEncoding</a> </li> </ul> </li> <li class="nav-group-name"> <a class="nav-group-name-link" href="../Typealiases.html">Type Aliases</a> <ul class="nav-group-tasks"> <li class="nav-group-task"> <a class="nav-group-task-link" href="../Typealiases.html#/s:9Alamofire11HTTPHeadersa">HTTPHeaders</a> </li> <li class="nav-group-task"> <a class="nav-group-task-link" href="../Typealiases.html#/s:9Alamofire10Parametersa">Parameters</a> </li> <li class="nav-group-task"> <a class="nav-group-task-link" href="../Typealiases.html#/s:9Alamofire22RequestRetryCompletiona">RequestRetryCompletion</a> </li> </ul> </li> </ul> </nav> <article class="main-content"> <section class="section"> <div class="section-content"> <h1>DataResponse</h1> <div class="declaration"> <div class="language"> <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">struct</span> <span class="kt">DataResponse</span><span class="o"><</span><span class="kt">Value</span><span class="o">></span></code></pre> </div> </div> <p>Used to store all data associated with a serialized response of a data or upload request.</p> </div> </section> <section class="section"> <div class="section-content"> <div class="task-group"> <ul class="item-container"> <li class="item"> <div> <code> <a name="/s:9Alamofire12DataResponseV7request10Foundation10URLRequestVSgvp"></a> <a name="//apple_ref/swift/Property/request" class="dashAnchor"></a> <a class="token" href="#/s:9Alamofire12DataResponseV7request10Foundation10URLRequestVSgvp">request</a> </code> </div> <div class="height-container"> <div class="pointer-container"></div> <section class="section"> <div class="pointer"></div> <div class="abstract"> <p>The URL request sent to the server.</p> </div> <div class="declaration"> <h4>Declaration</h4> <div class="language"> <p class="aside-title">Swift</p> <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">let</span> <span class="nv">request</span><span class="p">:</span> <span class="kt">URLRequest</span><span class="p">?</span></code></pre> </div> </div> </section> </div> </li> <li class="item"> <div> <code> <a name="/s:9Alamofire12DataResponseV8responseSo15HTTPURLResponseCSgvp"></a> <a name="//apple_ref/swift/Property/response" class="dashAnchor"></a> <a class="token" href="#/s:9Alamofire12DataResponseV8responseSo15HTTPURLResponseCSgvp">response</a> </code> </div> <div class="height-container"> <div class="pointer-container"></div> <section class="section"> <div class="pointer"></div> <div class="abstract"> <p>The server’s response to the URL request.</p> </div> <div class="declaration"> <h4>Declaration</h4> <div class="language"> <p class="aside-title">Swift</p> <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">let</span> <span class="nv">response</span><span class="p">:</span> <span class="kt">HTTPURLResponse</span><span class="p">?</span></code></pre> </div> </div> </section> </div> </li> <li class="item"> <div> <code> <a name="/s:9Alamofire12DataResponseV4data10Foundation0B0VSgvp"></a> <a name="//apple_ref/swift/Property/data" class="dashAnchor"></a> <a class="token" href="#/s:9Alamofire12DataResponseV4data10Foundation0B0VSgvp">data</a> </code> </div> <div class="height-container"> <div class="pointer-container"></div> <section class="section"> <div class="pointer"></div> <div class="abstract"> <p>The data returned by the server.</p> </div> <div class="declaration"> <h4>Declaration</h4> <div class="language"> <p class="aside-title">Swift</p> <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">let</span> <span class="nv">data</span><span class="p">:</span> <span class="kt">Data</span><span class="p">?</span></code></pre> </div> </div> </section> </div> </li> <li class="item"> <div> <code> <a name="/s:9Alamofire12DataResponseV6resultAA6ResultOyxGvp"></a> <a name="//apple_ref/swift/Property/result" class="dashAnchor"></a> <a class="token" href="#/s:9Alamofire12DataResponseV6resultAA6ResultOyxGvp">result</a> </code> </div> <div class="height-container"> <div class="pointer-container"></div> <section class="section"> <div class="pointer"></div> <div class="abstract"> <p>The result of response serialization.</p> </div> <div class="declaration"> <h4>Declaration</h4> <div class="language"> <p class="aside-title">Swift</p> <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">let</span> <span class="nv">result</span><span class="p">:</span> <span class="kt"><a href="../Enums/Result.html">Result</a></span><span class="o"><</span><span class="kt">Value</span><span class="o">></span></code></pre> </div> </div> </section> </div> </li> <li class="item"> <div> <code> <a name="/s:9Alamofire12DataResponseV8timelineAA8TimelineVvp"></a> <a name="//apple_ref/swift/Property/timeline" class="dashAnchor"></a> <a class="token" href="#/s:9Alamofire12DataResponseV8timelineAA8TimelineVvp">timeline</a> </code> </div> <div class="height-container"> <div class="pointer-container"></div> <section class="section"> <div class="pointer"></div> <div class="abstract"> <p>The timeline of the complete lifecycle of the request.</p> </div> <div class="declaration"> <h4>Declaration</h4> <div class="language"> <p class="aside-title">Swift</p> <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">let</span> <span class="nv">timeline</span><span class="p">:</span> <span class="kt"><a href="../Structs/Timeline.html">Timeline</a></span></code></pre> </div> </div> </section> </div> </li> <li class="item"> <div> <code> <a name="/s:9Alamofire12DataResponseV5valuexSgvp"></a> <a name="//apple_ref/swift/Property/value" class="dashAnchor"></a> <a class="token" href="#/s:9Alamofire12DataResponseV5valuexSgvp">value</a> </code> </div> <div class="height-container"> <div class="pointer-container"></div> <section class="section"> <div class="pointer"></div> <div class="abstract"> <p>Returns the associated value of the result if it is a success, <code>nil</code> otherwise.</p> </div> <div class="declaration"> <h4>Declaration</h4> <div class="language"> <p class="aside-title">Swift</p> <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">var</span> <span class="nv">value</span><span class="p">:</span> <span class="kt">Value</span><span class="p">?</span></code></pre> </div> </div> </section> </div> </li> <li class="item"> <div> <code> <a name="/s:9Alamofire12DataResponseV5errors5Error_pSgvp"></a> <a name="//apple_ref/swift/Property/error" class="dashAnchor"></a> <a class="token" href="#/s:9Alamofire12DataResponseV5errors5Error_pSgvp">error</a> </code> </div> <div class="height-container"> <div class="pointer-container"></div> <section class="section"> <div class="pointer"></div> <div class="abstract"> <p>Returns the associated error value if the result if it is a failure, <code>nil</code> otherwise.</p> </div> <div class="declaration"> <h4>Declaration</h4> <div class="language"> <p class="aside-title">Swift</p> <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">var</span> <span class="nv">error</span><span class="p">:</span> <span class="kt">Error</span><span class="p">?</span></code></pre> </div> </div> </section> </div> </li> <li class="item"> <div> <code> <a name="/s:9Alamofire12DataResponseVACyxG10Foundation10URLRequestVSg7request_So15HTTPURLResponseCSg8responseAE0B0VSg4dataAA6ResultOyxG6resultAA8TimelineV8timelinetcfc"></a> <a name="//apple_ref/swift/Method/init(request:response:data:result:timeline:)" class="dashAnchor"></a> <a class="token" href="#/s:9Alamofire12DataResponseVACyxG10Foundation10URLRequestVSg7request_So15HTTPURLResponseCSg8responseAE0B0VSg4dataAA6ResultOyxG6resultAA8TimelineV8timelinetcfc">init(request:response:data:result:timeline:)</a> </code> </div> <div class="height-container"> <div class="pointer-container"></div> <section class="section"> <div class="pointer"></div> <div class="abstract"> <p>Creates a <code>DataResponse</code> instance with the specified parameters derived from response serialization.</p> </div> <div class="declaration"> <h4>Declaration</h4> <div class="language"> <p class="aside-title">Swift</p> <pre class="highlight swift"><code><span class="kd">public</span> <span class="nf">init</span><span class="p">(</span> <span class="nv">request</span><span class="p">:</span> <span class="kt">URLRequest</span><span class="p">?,</span> <span class="nv">response</span><span class="p">:</span> <span class="kt">HTTPURLResponse</span><span class="p">?,</span> <span class="nv">data</span><span class="p">:</span> <span class="kt">Data</span><span class="p">?,</span> <span class="nv">result</span><span class="p">:</span> <span class="kt"><a href="../Enums/Result.html">Result</a></span><span class="o"><</span><span class="kt">Value</span><span class="o">></span><span class="p">,</span> <span class="nv">timeline</span><span class="p">:</span> <span class="kt"><a href="../Structs/Timeline.html">Timeline</a></span> <span class="o">=</span> <span class="kt"><a href="../Structs/Timeline.html">Timeline</a></span><span class="p">())</span></code></pre> </div> </div> <div> <h4>Parameters</h4> <table class="graybox"> <tbody> <tr> <td> <code> <em>request</em> </code> </td> <td> <div> <p>The URL request sent to the server.</p> </div> </td> </tr> <tr> <td> <code> <em>response</em> </code> </td> <td> <div> <p>The server’s response to the URL request.</p> </div> </td> </tr> <tr> <td> <code> <em>data</em> </code> </td> <td> <div> <p>The data returned by the server.</p> </div> </td> </tr> <tr> <td> <code> <em>result</em> </code> </td> <td> <div> <p>The result of response serialization.</p> </div> </td> </tr> <tr> <td> <code> <em>timeline</em> </code> </td> <td> <div> <p>The timeline of the complete lifecycle of the <code><a href="../Classes/Request.html">Request</a></code>. Defaults to <code>Timeline()</code>.</p> </div> </td> </tr> </tbody> </table> </div> <div> <h4>Return Value</h4> <p>The new <code>DataResponse</code> instance.</p> </div> </section> </div> </li> </ul> </div> <div class="task-group"> <ul class="item-container"> <li class="item"> <div> <code> <a name="/s:9Alamofire12DataResponseV11descriptionSSvp"></a> <a name="//apple_ref/swift/Property/description" class="dashAnchor"></a> <a class="token" href="#/s:9Alamofire12DataResponseV11descriptionSSvp">description</a> </code> </div> <div class="height-container"> <div class="pointer-container"></div> <section class="section"> <div class="pointer"></div> <div class="abstract"> <p>The textual representation used when written to an output stream, which includes whether the result was a success or failure.</p> </div> <div class="declaration"> <h4>Declaration</h4> <div class="language"> <p class="aside-title">Swift</p> <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">var</span> <span class="nv">description</span><span class="p">:</span> <span class="kt">String</span></code></pre> </div> </div> </section> </div> </li> <li class="item"> <div> <code> <a name="/s:9Alamofire12DataResponseV16debugDescriptionSSvp"></a> <a name="//apple_ref/swift/Property/debugDescription" class="dashAnchor"></a> <a class="token" href="#/s:9Alamofire12DataResponseV16debugDescriptionSSvp">debugDescription</a> </code> </div> <div class="height-container"> <div class="pointer-container"></div> <section class="section"> <div class="pointer"></div> <div class="abstract"> <p>The debug textual representation used when written to an output stream, which includes the URL request, the URL response, the server data, the response serialization result and the timeline.</p> </div> <div class="declaration"> <h4>Declaration</h4> <div class="language"> <p class="aside-title">Swift</p> <pre class="highlight swift"><code><span class="kd">public</span> <span class="k">var</span> <span class="nv">debugDescription</span><span class="p">:</span> <span class="kt">String</span></code></pre> </div> </div> </section> </div> </li> </ul> </div> <div class="task-group"> <ul class="item-container"> <li class="item"> <div> <code> <a name="/s:9Alamofire12DataResponseV3mapACyqd__Gqd__xclF"></a> <a name="//apple_ref/swift/Method/map(_:)" class="dashAnchor"></a> <a class="token" href="#/s:9Alamofire12DataResponseV3mapACyqd__Gqd__xclF">map(_:)</a> </code> </div> <div class="height-container"> <div class="pointer-container"></div> <section class="section"> <div class="pointer"></div> <div class="abstract"> <p>Evaluates the specified closure when the result of this <code>DataResponse</code> is a success, passing the unwrapped result value as a parameter.</p> <p>Use the <code>map</code> method with a closure that does not throw. For example:</p> <pre class="highlight swift"><code><span class="k">let</span> <span class="nv">possibleData</span><span class="p">:</span> <span class="kt">DataResponse</span><span class="o"><</span><span class="kt">Data</span><span class="o">></span> <span class="o">=</span> <span class="o">...</span> <span class="k">let</span> <span class="nv">possibleInt</span> <span class="o">=</span> <span class="n">possibleData</span><span class="o">.</span><span class="n">map</span> <span class="p">{</span> <span class="nv">$0</span><span class="o">.</span><span class="n">count</span> <span class="p">}</span> </code></pre> </div> <div class="declaration"> <h4>Declaration</h4> <div class="language"> <p class="aside-title">Swift</p> <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="n">map</span><span class="o"><</span><span class="kt">T</span><span class="o">></span><span class="p">(</span><span class="n">_</span> <span class="nv">transform</span><span class="p">:</span> <span class="p">(</span><span class="kt">Value</span><span class="p">)</span> <span class="o">-></span> <span class="kt">T</span><span class="p">)</span> <span class="o">-></span> <span class="kt">DataResponse</span><span class="o"><</span><span class="kt">T</span><span class="o">></span></code></pre> </div> </div> <div> <h4>Parameters</h4> <table class="graybox"> <tbody> <tr> <td> <code> <em>transform</em> </code> </td> <td> <div> <p>A closure that takes the success value of the instance’s result.</p> </div> </td> </tr> </tbody> </table> </div> <div> <h4>Return Value</h4> <p>A <code>DataResponse</code> whose result wraps the value returned by the given closure. If this instance’s result is a failure, returns a response wrapping the same failure.</p> </div> </section> </div> </li> <li class="item"> <div> <code> <a name="/s:9Alamofire12DataResponseV7flatMapACyqd__Gqd__xKclF"></a> <a name="//apple_ref/swift/Method/flatMap(_:)" class="dashAnchor"></a> <a class="token" href="#/s:9Alamofire12DataResponseV7flatMapACyqd__Gqd__xKclF">flatMap(_:)</a> </code> </div> <div class="height-container"> <div class="pointer-container"></div> <section class="section"> <div class="pointer"></div> <div class="abstract"> <p>Evaluates the given closure when the result of this <code>DataResponse</code> is a success, passing the unwrapped result value as a parameter.</p> <p>Use the <code>flatMap</code> method with a closure that may throw an error. For example:</p> <pre class="highlight swift"><code><span class="k">let</span> <span class="nv">possibleData</span><span class="p">:</span> <span class="kt">DataResponse</span><span class="o"><</span><span class="kt">Data</span><span class="o">></span> <span class="o">=</span> <span class="o">...</span> <span class="k">let</span> <span class="nv">possibleObject</span> <span class="o">=</span> <span class="n">possibleData</span><span class="o">.</span><span class="n">flatMap</span> <span class="p">{</span> <span class="k">try</span> <span class="kt">JSONSerialization</span><span class="o">.</span><span class="nf">jsonObject</span><span class="p">(</span><span class="nv">with</span><span class="p">:</span> <span class="nv">$0</span><span class="p">)</span> <span class="p">}</span> </code></pre> </div> <div class="declaration"> <h4>Declaration</h4> <div class="language"> <p class="aside-title">Swift</p> <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="n">flatMap</span><span class="o"><</span><span class="kt">T</span><span class="o">></span><span class="p">(</span><span class="n">_</span> <span class="nv">transform</span><span class="p">:</span> <span class="p">(</span><span class="kt">Value</span><span class="p">)</span> <span class="k">throws</span> <span class="o">-></span> <span class="kt">T</span><span class="p">)</span> <span class="o">-></span> <span class="kt">DataResponse</span><span class="o"><</span><span class="kt">T</span><span class="o">></span></code></pre> </div> </div> <div> <h4>Parameters</h4> <table class="graybox"> <tbody> <tr> <td> <code> <em>transform</em> </code> </td> <td> <div> <p>A closure that takes the success value of the instance’s result.</p> </div> </td> </tr> </tbody> </table> </div> <div> <h4>Return Value</h4> <p>A success or failure <code>DataResponse</code> depending on the result of the given closure. If this instance’s result is a failure, returns the same failure.</p> </div> </section> </div> </li> <li class="item"> <div> <code> <a name="/s:9Alamofire12DataResponseV8mapErrorACyxGqd__s0E0_pcsAFRd__lF"></a> <a name="//apple_ref/swift/Method/mapError(_:)" class="dashAnchor"></a> <a class="token" href="#/s:9Alamofire12DataResponseV8mapErrorACyxGqd__s0E0_pcsAFRd__lF">mapError(_:)</a> </code> </div> <div class="height-container"> <div class="pointer-container"></div> <section class="section"> <div class="pointer"></div> <div class="abstract"> <p>Evaluates the specified closure when the <code>DataResponse</code> is a failure, passing the unwrapped error as a parameter.</p> <p>Use the <code>mapError</code> function with a closure that does not throw. For example:</p> <pre class="highlight swift"><code><span class="k">let</span> <span class="nv">possibleData</span><span class="p">:</span> <span class="kt">DataResponse</span><span class="o"><</span><span class="kt">Data</span><span class="o">></span> <span class="o">=</span> <span class="o">...</span> <span class="k">let</span> <span class="nv">withMyError</span> <span class="o">=</span> <span class="n">possibleData</span><span class="o">.</span><span class="n">mapError</span> <span class="p">{</span> <span class="kt">MyError</span><span class="o">.</span><span class="nf">error</span><span class="p">(</span><span class="nv">$0</span><span class="p">)</span> <span class="p">}</span> </code></pre> </div> <div class="declaration"> <h4>Declaration</h4> <div class="language"> <p class="aside-title">Swift</p> <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="n">mapError</span><span class="o"><</span><span class="kt">E</span><span class="p">:</span> <span class="kt">Error</span><span class="o">></span><span class="p">(</span><span class="n">_</span> <span class="nv">transform</span><span class="p">:</span> <span class="p">(</span><span class="kt">Error</span><span class="p">)</span> <span class="o">-></span> <span class="kt">E</span><span class="p">)</span> <span class="o">-></span> <span class="kt">DataResponse</span></code></pre> </div> </div> <div> <h4>Parameters</h4> <table class="graybox"> <tbody> <tr> <td> <code> <em>transform</em> </code> </td> <td> <div> <p>A closure that takes the error of the instance.</p> </div> </td> </tr> </tbody> </table> </div> <div> <h4>Return Value</h4> <p>A <code>DataResponse</code> instance containing the result of the transform.</p> </div> </section> </div> </li> <li class="item"> <div> <code> <a name="/s:9Alamofire12DataResponseV12flatMapErrorACyxGqd__s0F0_pKcsAFRd__lF"></a> <a name="//apple_ref/swift/Method/flatMapError(_:)" class="dashAnchor"></a> <a class="token" href="#/s:9Alamofire12DataResponseV12flatMapErrorACyxGqd__s0F0_pKcsAFRd__lF">flatMapError(_:)</a> </code> </div> <div class="height-container"> <div class="pointer-container"></div> <section class="section"> <div class="pointer"></div> <div class="abstract"> <p>Evaluates the specified closure when the <code>DataResponse</code> is a failure, passing the unwrapped error as a parameter.</p> <p>Use the <code>flatMapError</code> function with a closure that may throw an error. For example:</p> <pre class="highlight swift"><code><span class="k">let</span> <span class="nv">possibleData</span><span class="p">:</span> <span class="kt">DataResponse</span><span class="o"><</span><span class="kt">Data</span><span class="o">></span> <span class="o">=</span> <span class="o">...</span> <span class="k">let</span> <span class="nv">possibleObject</span> <span class="o">=</span> <span class="n">possibleData</span><span class="o">.</span><span class="n">flatMapError</span> <span class="p">{</span> <span class="k">try</span> <span class="nf">someFailableFunction</span><span class="p">(</span><span class="nv">taking</span><span class="p">:</span> <span class="nv">$0</span><span class="p">)</span> <span class="p">}</span> </code></pre> </div> <div class="declaration"> <h4>Declaration</h4> <div class="language"> <p class="aside-title">Swift</p> <pre class="highlight swift"><code><span class="kd">public