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<a href="#GDataDownloadStream.description" class="shortcut">Description</a>
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<a href="#GDataDownloadStream.object-hierarchy" class="shortcut">Object Hierarchy</a>
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<a href="#GDataDownloadStream.implemented-interfaces" class="shortcut">Implemented Interfaces</a>
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<a href="#GDataDownloadStream.properties" class="shortcut">Properties</a>
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<div class="refentry">
<a name="GDataDownloadStream"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle"><a name="GDataDownloadStream.top_of_page"></a>GDataDownloadStream</span></h2>
<p>GDataDownloadStream — GData download stream object</p>
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<div class="refsect1">
<a name="GDataDownloadStream.stability-level"></a><h2>Stability Level</h2>
Unstable, unless otherwise indicated
</div>
<div class="refsynopsisdiv">
<a name="GDataDownloadStream.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <gdata/gdata-download-stream.h>
<a class="link" href="GDataDownloadStream.html#GDataDownloadStream-struct" title="GDataDownloadStream">GDataDownloadStream</a>;
<a class="link" href="GDataDownloadStream.html#GDataDownloadStreamClass" title="GDataDownloadStreamClass">GDataDownloadStreamClass</a>;
<a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html"><span class="returnvalue">GInputStream</span></a> * <a class="link" href="GDataDownloadStream.html#gdata-download-stream-new" title="gdata_download_stream_new ()">gdata_download_stream_new</a> (<em class="parameter"><code><a class="link" href="GDataService.html" title="GDataService"><span class="type">GDataService</span></a> *service</code></em>,
<em class="parameter"><code><a class="link" href="GDataAuthorizationDomain.html" title="GDataAuthorizationDomain"><span class="type">GDataAuthorizationDomain</span></a> *domain</code></em>,
<em class="parameter"><code>const <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *download_uri</code></em>,
<em class="parameter"><code><a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html"><span class="type">GCancellable</span></a> *cancellable</code></em>);
<a class="link" href="GDataService.html" title="GDataService"><span class="returnvalue">GDataService</span></a> * <a class="link" href="GDataDownloadStream.html#gdata-download-stream-get-service" title="gdata_download_stream_get_service ()">gdata_download_stream_get_service</a> (<em class="parameter"><code><a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> *self</code></em>);
<a class="link" href="GDataAuthorizationDomain.html" title="GDataAuthorizationDomain"><span class="returnvalue">GDataAuthorizationDomain</span></a> * <a class="link" href="GDataDownloadStream.html#gdata-download-stream-get-authorization-domain" title="gdata_download_stream_get_authorization_domain ()">gdata_download_stream_get_authorization_domain</a>
(<em class="parameter"><code><a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> *self</code></em>);
<a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html"><span class="returnvalue">GCancellable</span></a> * <a class="link" href="GDataDownloadStream.html#gdata-download-stream-get-cancellable" title="gdata_download_stream_get_cancellable ()">gdata_download_stream_get_cancellable</a>
(<em class="parameter"><code><a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> *self</code></em>);
const <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * <a class="link" href="GDataDownloadStream.html#gdata-download-stream-get-download-uri" title="gdata_download_stream_get_download_uri ()">gdata_download_stream_get_download_uri</a>
(<em class="parameter"><code><a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> *self</code></em>);
const <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * <a class="link" href="GDataDownloadStream.html#gdata-download-stream-get-content-type" title="gdata_download_stream_get_content_type ()">gdata_download_stream_get_content_type</a>
(<em class="parameter"><code><a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> *self</code></em>);
<a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Basic-Types.html#gssize"><span class="returnvalue">gssize</span></a> <a class="link" href="GDataDownloadStream.html#gdata-download-stream-get-content-length" title="gdata_download_stream_get_content_length ()">gdata_download_stream_get_content_length</a>
(<em class="parameter"><code><a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> *self</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="GDataDownloadStream.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
<a href="/opt/gnome3/build/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
+----<a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html">GInputStream</a>
+----GDataDownloadStream
</pre>
</div>
<div class="refsect1">
<a name="GDataDownloadStream.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
GDataDownloadStream implements
<a href="/opt/gnome3/build/share/gtk-doc/html/gio/GSeekable.html">GSeekable</a>.</p>
</div>
<div class="refsect1">
<a name="GDataDownloadStream.properties"></a><h2>Properties</h2>
<pre class="synopsis">
"<a class="link" href="GDataDownloadStream.html#GDataDownloadStream--authorization-domain" title='The "authorization-domain" property'>authorization-domain</a>" <a class="link" href="GDataAuthorizationDomain.html" title="GDataAuthorizationDomain"><span class="type">GDataAuthorizationDomain</span></a>* : Read / Write / Construct Only
"<a class="link" href="GDataDownloadStream.html#GDataDownloadStream--cancellable" title='The "cancellable" property'>cancellable</a>" <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html"><span class="type">GCancellable</span></a>* : Read / Write / Construct Only
"<a class="link" href="GDataDownloadStream.html#GDataDownloadStream--content-length" title='The "content-length" property'>content-length</a>" <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Basic-Types.html#glong"><span class="type">glong</span></a> : Read
"<a class="link" href="GDataDownloadStream.html#GDataDownloadStream--content-type" title='The "content-type" property'>content-type</a>" <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>* : Read
"<a class="link" href="GDataDownloadStream.html#GDataDownloadStream--download-uri" title='The "download-uri" property'>download-uri</a>" <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>* : Read / Write / Construct Only
"<a class="link" href="GDataDownloadStream.html#GDataDownloadStream--service" title='The "service" property'>service</a>" <a class="link" href="GDataService.html" title="GDataService"><span class="type">GDataService</span></a>* : Read / Write / Construct Only
</pre>
</div>
<div class="refsect1">
<a name="GDataDownloadStream.description"></a><h2>Description</h2>
<p>
<a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> is a <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html"><span class="type">GInputStream</span></a> subclass to allow downloading of files from GData services with authorization from a <a class="link" href="GDataService.html" title="GDataService"><span class="type">GDataService</span></a> under
the given <a class="link" href="GDataAuthorizationDomain.html" title="GDataAuthorizationDomain"><span class="type">GDataAuthorizationDomain</span></a>. If authorization is not required to perform the download, a <a class="link" href="GDataAuthorizationDomain.html" title="GDataAuthorizationDomain"><span class="type">GDataAuthorizationDomain</span></a> doesn't have to be
specified.
</p>
<p>
Once a <a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> is instantiated with <a class="link" href="GDataDownloadStream.html#gdata-download-stream-new" title="gdata_download_stream_new ()"><code class="function">gdata_download_stream_new()</code></a>, the standard <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html"><span class="type">GInputStream</span></a> API can be used on the stream to download
the file. Network communication may not actually begin until the first call to <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html#g-input-stream-read"><code class="function">g_input_stream_read()</code></a>, so having a <a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> around is no
guarantee that the file is being downloaded.
</p>
<p>
The content type and length of the file being downloaded are made available through <a class="link" href="GDataDownloadStream.html#GDataDownloadStream--content-type" title='The "content-type" property'><span class="type">"content-type"</span></a> and
<a class="link" href="GDataDownloadStream.html#GDataDownloadStream--content-length" title='The "content-length" property'><span class="type">"content-length"</span></a> as soon as the appropriate data is received from the server. Connect to the
<a href="/opt/gnome3/build/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject-notify"><span class="type">"notify"</span></a> <code class="code">content-type</code> and <code class="code">content-length</code> details to be notified as
soon as the data is available.
</p>
<p>
The entire download operation can be cancelled using the <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html"><span class="type">GCancellable</span></a> instance provided to <a class="link" href="GDataDownloadStream.html#gdata-download-stream-new" title="gdata_download_stream_new ()"><code class="function">gdata_download_stream_new()</code></a>, or returned by
<a class="link" href="GDataDownloadStream.html#gdata-download-stream-get-cancellable" title="gdata_download_stream_get_cancellable ()"><code class="function">gdata_download_stream_get_cancellable()</code></a>. Cancelling this at any time will cause all future <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html"><span class="type">GInputStream</span></a> method calls to return
<a href="/opt/gnome3/build/share/gtk-doc/html/gio/gio-GIOError.html#G-IO-ERROR-CANCELLED:CAPS"><code class="literal">G_IO_ERROR_CANCELLED</code></a>. If any <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html"><span class="type">GInputStream</span></a> methods are in the process of being called, they will be cancelled and return <a href="/opt/gnome3/build/share/gtk-doc/html/gio/gio-GIOError.html#G-IO-ERROR-CANCELLED:CAPS"><code class="literal">G_IO_ERROR_CANCELLED</code></a> as
soon as possible.
</p>
<p>
Note that cancelling an individual method call (such as a call to <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html#g-input-stream-read"><code class="function">g_input_stream_read()</code></a>) using the <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html"><span class="type">GCancellable</span></a> parameter of the method will not
cancel the download as a whole — just that particular method call. In the case of <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html#g-input-stream-read"><code class="function">g_input_stream_read()</code></a>, this will cause it to successfully return
any data that it has in memory at the moment (up to the requested number of bytes), or return a <a href="/opt/gnome3/build/share/gtk-doc/html/gio/gio-GIOError.html#G-IO-ERROR-CANCELLED:CAPS"><code class="literal">G_IO_ERROR_CANCELLED</code></a> if it was blocking on receiving
data from the network. This is also the behaviour of <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html#g-input-stream-read"><code class="function">g_input_stream_read()</code></a> when the download operation as a whole is cancelled.
</p>
<p>
In the case of <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html#g-input-stream-close"><code class="function">g_input_stream_close()</code></a>, the call will return immediately if network activity hasn't yet started. If it has, the network activity will
be cancelled, regardless of whether the call to <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html#g-input-stream-close"><code class="function">g_input_stream_close()</code></a> is cancelled. Cancelling a pending call to <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html#g-input-stream-close"><code class="function">g_input_stream_close()</code></a> (either
using the method's <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html"><span class="type">GCancellable</span></a>, or by cancelling the download stream as a whole) will cause it to stop waiting for the network activity to finish,
and return <a href="/opt/gnome3/build/share/gtk-doc/html/gio/gio-GIOError.html#G-IO-ERROR-CANCELLED:CAPS"><code class="literal">G_IO_ERROR_CANCELLED</code></a> immediately. Network activity will continue to be shut down in the background.
</p>
<p>
If the server returns an error message (for example, if the user is not correctly authenticated/authorized or doesn't have suitable permissions to
download from the given URI), it will be returned as a <a class="link" href="GDataService.html#GDataServiceError" title="enum GDataServiceError"><span class="type">GDataServiceError</span></a> by the first call to <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html#g-input-stream-read"><code class="function">g_input_stream_read()</code></a>.
</p>
<p>
</p>
<div class="example">
<a name="id479712"></a><p class="title"><b>Example 1. Downloading to a File</b></p>
<div class="example-contents">
<table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
<tbody>
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<td class="listing_code"><pre class="programlisting"><span class="usertype">GDataService</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">service</span><span class="symbol">;</span>
<span class="usertype">GDataAuthorizationDomain</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">domain</span><span class="symbol">;</span>
<span class="usertype">GCancellable</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">cancellable</span><span class="symbol">;</span>
<span class="usertype">GInputStream</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">download_stream</span><span class="symbol">;</span>
<span class="usertype">GOutputStream</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">output_stream</span><span class="symbol">;</span>
<span class="comment">/* Create the download stream */</span>
<span class="normal">service </span><span class="symbol">=</span><span class="normal"> </span><span class="function">create_my_service</span><span class="normal"> </span><span class="symbol">();</span>
<span class="normal">domain </span><span class="symbol">=</span><span class="normal"> </span><span class="function">get_my_authorization_domain_from_service</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">service</span><span class="symbol">);</span>
<span class="normal">cancellable </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html#g-cancellable-new">g_cancellable_new</a></span><span class="normal"> </span><span class="symbol">();</span><span class="normal"> </span><span class="comment">/* cancel this to cancel the entire download operation */</span>
<span class="normal">download_stream </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="GDataDownloadStream.html#gdata-download-stream-new">gdata_download_stream_new</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">service</span><span class="symbol">,</span><span class="normal"> domain</span><span class="symbol">,</span><span class="normal"> download_uri</span><span class="symbol">,</span><span class="normal"> cancellable</span><span class="symbol">);</span>
<span class="normal">output_stream </span><span class="symbol">=</span><span class="normal"> </span><span class="function">create_file_and_return_output_stream</span><span class="normal"> </span><span class="symbol">();</span>
<span class="comment">/* Perform the download asynchronously */</span>
<span class="function"><a href="/opt/gnome3/build/share/gtk-doc/html/gio/GOutputStream.html#g-output-stream-splice-async">g_output_stream_splice_async</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">output_stream</span><span class="symbol">,</span><span class="normal"> download_stream</span><span class="symbol">,</span><span class="normal"> <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GOutputStream.html#G-OUTPUT-STREAM-SPLICE-CLOSE-SOURCE:CAPS">G_OUTPUT_STREAM_SPLICE_CLOSE_SOURCE</a> </span><span class="symbol">|</span><span class="normal"> <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GOutputStream.html#G-OUTPUT-STREAM-SPLICE-CLOSE-TARGET:CAPS">G_OUTPUT_STREAM_SPLICE_CLOSE_TARGET</a></span><span class="symbol">,</span>
<span class="normal"> <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-The-Main-Event-Loop.html#G-PRIORITY-DEFAULT:CAPS">G_PRIORITY_DEFAULT</a></span><span class="symbol">,</span><span class="normal"> <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">,</span><span class="normal"> </span><span class="symbol">(</span><span class="normal"><a href="/opt/gnome3/build/share/gtk-doc/html/gio/GAsyncResult.html#GAsyncReadyCallback">GAsyncReadyCallback</a></span><span class="symbol">)</span><span class="normal"> download_splice_cb</span><span class="symbol">,</span><span class="normal"> <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">);</span>
<span class="function"><a href="/opt/gnome3/build/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#g-object-unref">g_object_unref</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">output_stream</span><span class="symbol">);</span>
<span class="function"><a href="/opt/gnome3/build/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#g-object-unref">g_object_unref</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">download_stream</span><span class="symbol">);</span>
<span class="function"><a href="/opt/gnome3/build/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#g-object-unref">g_object_unref</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cancellable</span><span class="symbol">);</span>
<span class="function"><a href="/opt/gnome3/build/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#g-object-unref">g_object_unref</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">domain</span><span class="symbol">);</span>
<span class="function"><a href="/opt/gnome3/build/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#g-object-unref">g_object_unref</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">service</span><span class="symbol">);</span>
<span class="keyword">static</span><span class="normal"> </span><span class="type">void</span>
<span class="function">download_splice_cb</span><span class="normal"> </span><span class="symbol">(</span><span class="usertype">GOutputStream</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">output_stream</span><span class="symbol">,</span><span class="normal"> </span><span class="usertype">GAsyncResult</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">result</span><span class="symbol">,</span><span class="normal"> </span><span class="usertype">gpointer</span><span class="normal"> user_data</span><span class="symbol">)</span>
<span class="cbracket">{</span>
<span class="normal"> </span><span class="usertype">GError</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">error </span><span class="symbol">=</span><span class="normal"> <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">;</span>
<span class="normal"> </span><span class="function"><a href="/opt/gnome3/build/share/gtk-doc/html/gio/GOutputStream.html#g-output-stream-splice-finish">g_output_stream_splice_finish</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">output_stream</span><span class="symbol">,</span><span class="normal"> result</span><span class="symbol">,</span><span class="normal"> </span><span class="symbol">&</span><span class="normal">error</span><span class="symbol">);</span>
<span class="normal"> </span><span class="keyword">if</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">error </span><span class="symbol">!=</span><span class="normal"> <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS">NULL</a> </span><span class="symbol">&&</span><span class="normal"> </span><span class="function"><a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Error-Reporting.html#g-error-matches">g_error_matches</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">error</span><span class="symbol">,</span><span class="normal"> <a href="/opt/gnome3/build/share/gtk-doc/html/gio/gio-GIOError.html#G-IO-ERROR:CAPS">G_IO_ERROR</a></span><span class="symbol">,</span><span class="normal"> <a href="/opt/gnome3/build/share/gtk-doc/html/gio/gio-GIOError.html#G-IO-ERROR-CANCELLED:CAPS">G_IO_ERROR_CANCELLED</a></span><span class="symbol">)</span><span class="normal"> </span><span class="symbol">==</span><span class="normal"> <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS">FALSE</a></span><span class="symbol">))</span><span class="normal"> </span><span class="cbracket">{</span>
<span class="normal"> </span><span class="comment">/* Error downloading the file; potentially an I/O error (GIOError), or an error response from the server</span>
<span class="comment"> * (GDataServiceError). You might want to delete the newly created file because of the error. */</span>
<span class="normal"> </span><span class="function"><a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Message-Logging.html#g-error">g_error</a></span><span class="normal"> </span><span class="symbol">(</span><span class="string">"Error downloading file: %s"</span><span class="symbol">,</span><span class="normal"> error</span><span class="symbol">-></span><span class="normal">message</span><span class="symbol">);</span>
<span class="normal"> </span><span class="function"><a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Error-Reporting.html#g-error-free">g_error_free</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">error</span><span class="symbol">);</span>
<span class="normal"> </span><span class="cbracket">}</span>
<span class="cbracket">}</span></pre></td>
</tr>
</tbody>
</table>
</div>
</div>
<p><br class="example-break">
</p>
</div>
<div class="refsect1">
<a name="GDataDownloadStream.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GDataDownloadStream-struct"></a><h3>GDataDownloadStream</h3>
<pre class="programlisting">typedef struct _GDataDownloadStream GDataDownloadStream;</pre>
<p>
All the fields in the <a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> structure are private and should never be accessed directly.
</p>
<p class="since">Since 0.5.0</p>
</div>
<hr>
<div class="refsect2">
<a name="GDataDownloadStreamClass"></a><h3>GDataDownloadStreamClass</h3>
<pre class="programlisting">typedef struct {
} GDataDownloadStreamClass;
</pre>
<p>
All the fields in the <a class="link" href="GDataDownloadStream.html#GDataDownloadStreamClass" title="GDataDownloadStreamClass"><span class="type">GDataDownloadStreamClass</span></a> structure are private and should never be accessed directly.
</p>
<p class="since">Since 0.5.0</p>
</div>
<hr>
<div class="refsect2">
<a name="gdata-download-stream-new"></a><h3>gdata_download_stream_new ()</h3>
<pre class="programlisting"><a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html"><span class="returnvalue">GInputStream</span></a> * gdata_download_stream_new (<em class="parameter"><code><a class="link" href="GDataService.html" title="GDataService"><span class="type">GDataService</span></a> *service</code></em>,
<em class="parameter"><code><a class="link" href="GDataAuthorizationDomain.html" title="GDataAuthorizationDomain"><span class="type">GDataAuthorizationDomain</span></a> *domain</code></em>,
<em class="parameter"><code>const <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *download_uri</code></em>,
<em class="parameter"><code><a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html"><span class="type">GCancellable</span></a> *cancellable</code></em>);</pre>
<p>
Creates a new <a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a>, allowing a file to be downloaded from a GData service using standard <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html"><span class="type">GInputStream</span></a> API.
</p>
<p>
As well as the standard GIO errors, calls to the <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html"><span class="type">GInputStream</span></a> API on a <a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> can also return any relevant specific error from
<a class="link" href="GDataService.html#GDataServiceError" title="enum GDataServiceError"><span class="type">GDataServiceError</span></a>, or <a class="link" href="GDataService.html#GDATA-SERVICE-ERROR-PROTOCOL-ERROR:CAPS"><code class="literal">GDATA_SERVICE_ERROR_PROTOCOL_ERROR</code></a> in the general case.
</p>
<p>
If a <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html"><span class="type">GCancellable</span></a> is provided in <em class="parameter"><code>cancellable</code></em>, the download operation may be cancelled at any time from another thread using <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html#g-cancellable-cancel"><code class="function">g_cancellable_cancel()</code></a>.
In this case, any ongoing network activity will be stopped, and any pending or future calls to <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html"><span class="type">GInputStream</span></a> API on the <a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> will
return <a href="/opt/gnome3/build/share/gtk-doc/html/gio/gio-GIOError.html#G-IO-ERROR-CANCELLED:CAPS"><code class="literal">G_IO_ERROR_CANCELLED</code></a>. Note that the <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html"><span class="type">GCancellable</span></a> objects which can be passed to individual <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html"><span class="type">GInputStream</span></a> operations will not cancel the
download operation proper if cancelled — they will merely cancel that API call. The only way to cancel the download operation completely is using
this <em class="parameter"><code>cancellable</code></em>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>service</code></em> :</span></p></td>
<td>a <a class="link" href="GDataService.html" title="GDataService"><span class="type">GDataService</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>domain</code></em> :</span></p></td>
<td>the <a class="link" href="GDataAuthorizationDomain.html" title="GDataAuthorizationDomain"><span class="type">GDataAuthorizationDomain</span></a> to authorize the download, or <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>download_uri</code></em> :</span></p></td>
<td>the URI to download</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>cancellable</code></em> :</span></p></td>
<td>a <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html"><span class="type">GCancellable</span></a> for the entire download stream, or <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a new <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html"><span class="type">GInputStream</span></a>, or <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>; unref with <a href="/opt/gnome3/build/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#g-object-unref"><code class="function">g_object_unref()</code></a>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.9.0</p>
</div>
<hr>
<div class="refsect2">
<a name="gdata-download-stream-get-service"></a><h3>gdata_download_stream_get_service ()</h3>
<pre class="programlisting"><a class="link" href="GDataService.html" title="GDataService"><span class="returnvalue">GDataService</span></a> * gdata_download_stream_get_service (<em class="parameter"><code><a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> *self</code></em>);</pre>
<p>
Gets the service used to authorize the download, as passed to <a class="link" href="GDataDownloadStream.html#gdata-download-stream-new" title="gdata_download_stream_new ()"><code class="function">gdata_download_stream_new()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>self</code></em> :</span></p></td>
<td>a <a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the <a class="link" href="GDataService.html" title="GDataService"><span class="type">GDataService</span></a> used to authorize the download. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.5.0</p>
</div>
<hr>
<div class="refsect2">
<a name="gdata-download-stream-get-authorization-domain"></a><h3>gdata_download_stream_get_authorization_domain ()</h3>
<pre class="programlisting"><a class="link" href="GDataAuthorizationDomain.html" title="GDataAuthorizationDomain"><span class="returnvalue">GDataAuthorizationDomain</span></a> * gdata_download_stream_get_authorization_domain
(<em class="parameter"><code><a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> *self</code></em>);</pre>
<p>
Gets the authorization domain used to authorize the download, as passed to <a class="link" href="GDataDownloadStream.html#gdata-download-stream-new" title="gdata_download_stream_new ()"><code class="function">gdata_download_stream_new()</code></a>. It may be <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if authorization is not
needed for the download.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>self</code></em> :</span></p></td>
<td>a <a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the <a class="link" href="GDataAuthorizationDomain.html" title="GDataAuthorizationDomain"><span class="type">GDataAuthorizationDomain</span></a> used to authorize the download, or <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.9.0</p>
</div>
<hr>
<div class="refsect2">
<a name="gdata-download-stream-get-cancellable"></a><h3>gdata_download_stream_get_cancellable ()</h3>
<pre class="programlisting"><a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html"><span class="returnvalue">GCancellable</span></a> * gdata_download_stream_get_cancellable
(<em class="parameter"><code><a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> *self</code></em>);</pre>
<p>
Gets the <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html"><span class="type">GCancellable</span></a> for the entire download operation, <a class="link" href="GDataDownloadStream.html#GDataDownloadStream--cancellable" title='The "cancellable" property'><span class="type">"cancellable"</span></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>self</code></em> :</span></p></td>
<td>a <a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html"><span class="type">GCancellable</span></a> for the entire download operation. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.8.0</p>
</div>
<hr>
<div class="refsect2">
<a name="gdata-download-stream-get-download-uri"></a><h3>gdata_download_stream_get_download_uri ()</h3>
<pre class="programlisting">const <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * gdata_download_stream_get_download_uri
(<em class="parameter"><code><a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> *self</code></em>);</pre>
<p>
Gets the URI of the file being downloaded, as passed to <a class="link" href="GDataDownloadStream.html#gdata-download-stream-new" title="gdata_download_stream_new ()"><code class="function">gdata_download_stream_new()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>self</code></em> :</span></p></td>
<td>a <a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the URI of the file being downloaded</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.5.0</p>
</div>
<hr>
<div class="refsect2">
<a name="gdata-download-stream-get-content-type"></a><h3>gdata_download_stream_get_content_type ()</h3>
<pre class="programlisting">const <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * gdata_download_stream_get_content_type
(<em class="parameter"><code><a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> *self</code></em>);</pre>
<p>
Gets the content type of the file being downloaded. If the <code class="literal">Content-Type</code> header has not yet
been received, <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> will be returned.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>self</code></em> :</span></p></td>
<td>a <a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the content type of the file being downloaded, or <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.5.0</p>
</div>
<hr>
<div class="refsect2">
<a name="gdata-download-stream-get-content-length"></a><h3>gdata_download_stream_get_content_length ()</h3>
<pre class="programlisting"><a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Basic-Types.html#gssize"><span class="returnvalue">gssize</span></a> gdata_download_stream_get_content_length
(<em class="parameter"><code><a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> *self</code></em>);</pre>
<p>
Gets the length (in bytes) of the file being downloaded. If the <code class="literal">Content-Length</code> header has not yet
been received from the server, <code class="code">-1</code> will be returned.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>self</code></em> :</span></p></td>
<td>a <a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the content length of the file being downloaded, or <code class="code">-1</code>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.5.0</p>
</div>
</div>
<div class="refsect1">
<a name="GDataDownloadStream.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GDataDownloadStream--authorization-domain"></a><h3>The <code class="literal">"authorization-domain"</code> property</h3>
<pre class="programlisting"> "authorization-domain" <a class="link" href="GDataAuthorizationDomain.html" title="GDataAuthorizationDomain"><span class="type">GDataAuthorizationDomain</span></a>* : Read / Write / Construct Only</pre>
<p>
The authorization domain for the download, against which the <a class="link" href="GDataService.html#GDataService--authorizer" title='The "authorizer" property'><span class="type">"authorizer"</span></a> for the <a class="link" href="GDataDownloadStream.html#GDataDownloadStream--service" title='The "service" property'><span class="type">"service"</span></a> should be
authorized. This may be <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if authorization is not needed for the download.
</p>
<p class="since">Since 0.9.0</p>
</div>
<hr>
<div class="refsect2">
<a name="GDataDownloadStream--cancellable"></a><h3>The <code class="literal">"cancellable"</code> property</h3>
<pre class="programlisting"> "cancellable" <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html"><span class="type">GCancellable</span></a>* : Read / Write / Construct Only</pre>
<p>
An optional cancellable used to cancel the entire download operation. If a <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html"><span class="type">GCancellable</span></a> instance isn't provided for this property at
construction time (i.e. to <a class="link" href="GDataDownloadStream.html#gdata-download-stream-new" title="gdata_download_stream_new ()"><code class="function">gdata_download_stream_new()</code></a>), one will be created internally and can be retrieved using
<a class="link" href="GDataDownloadStream.html#gdata-download-stream-get-cancellable" title="gdata_download_stream_get_cancellable ()"><code class="function">gdata_download_stream_get_cancellable()</code></a> and used to cancel the download operation with <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html#g-cancellable-cancel"><code class="function">g_cancellable_cancel()</code></a> just as if it was passed to
<a class="link" href="GDataDownloadStream.html#gdata-download-stream-new" title="gdata_download_stream_new ()"><code class="function">gdata_download_stream_new()</code></a>.
</p>
<p>
If the download operation is cancelled using this <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html"><span class="type">GCancellable</span></a>, any ongoing network activity will be stopped, and any pending or future
calls to <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html"><span class="type">GInputStream</span></a> API on the <a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> will return <a href="/opt/gnome3/build/share/gtk-doc/html/gio/gio-GIOError.html#G-IO-ERROR-CANCELLED:CAPS"><code class="literal">G_IO_ERROR_CANCELLED</code></a>. Note that the <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GCancellable.html"><span class="type">GCancellable</span></a> objects which can be
passed to individual <a href="/opt/gnome3/build/share/gtk-doc/html/gio/GInputStream.html"><span class="type">GInputStream</span></a> operations will not cancel the download operation proper if cancelled — they will merely cancel that API
call. The only way to cancel the download operation completely is using <a class="link" href="GDataDownloadStream.html#GDataDownloadStream--cancellable" title='The "cancellable" property'><span class="type">"cancellable"</span></a>.
</p>
<p class="since">Since 0.8.0</p>
</div>
<hr>
<div class="refsect2">
<a name="GDataDownloadStream--content-length"></a><h3>The <code class="literal">"content-length"</code> property</h3>
<pre class="programlisting"> "content-length" <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Basic-Types.html#glong"><span class="type">glong</span></a> : Read</pre>
<p>
The length (in bytes) of the file being downloaded. This will initially be <code class="code">-1</code>, and will be populated as soon as
the appropriate header is received from the server. Its value will never change after this.
</p>
<p>
Note that change notifications for this property (<a href="/opt/gnome3/build/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject-notify"><span class="type">"notify"</span></a> emissions) may be emitted in threads other than the one which created
the <a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a>. It is the client's responsibility to ensure that any notification signal handlers are either multi-thread safe
or marshal the notification to the thread which owns the <a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> as appropriate.
</p>
<p>Allowed values: >= -1</p>
<p>Default value: -1</p>
<p class="since">Since 0.5.0</p>
</div>
<hr>
<div class="refsect2">
<a name="GDataDownloadStream--content-type"></a><h3>The <code class="literal">"content-type"</code> property</h3>
<pre class="programlisting"> "content-type" <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>* : Read</pre>
<p>
The content type of the file being downloaded. This will initially be <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, and will be populated as soon as the appropriate header is
received from the server. Its value will never change after this.
</p>
<p>
Note that change notifications for this property (<a href="/opt/gnome3/build/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject-notify"><span class="type">"notify"</span></a> emissions) may be emitted in threads other than the one which created
the <a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a>. It is the client's responsibility to ensure that any notification signal handlers are either multi-thread safe
or marshal the notification to the thread which owns the <a class="link" href="GDataDownloadStream.html" title="GDataDownloadStream"><span class="type">GDataDownloadStream</span></a> as appropriate.
</p>
<p>Default value: NULL</p>
<p class="since">Since 0.5.0</p>
</div>
<hr>
<div class="refsect2">
<a name="GDataDownloadStream--download-uri"></a><h3>The <code class="literal">"download-uri"</code> property</h3>
<pre class="programlisting"> "download-uri" <a href="/opt/gnome3/build/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>* : Read / Write / Construct Only</pre>
<p>
The URI of the file to download.
</p>
<p>Default value: NULL</p>
<p class="since">Since 0.5.0</p>
</div>
<hr>
<div class="refsect2">
<a name="GDataDownloadStream--service"></a><h3>The <code class="literal">"service"</code> property</h3>
<pre class="programlisting"> "service" <a class="link" href="GDataService.html" title="GDataService"><span class="type">GDataService</span></a>* : Read / Write / Construct Only</pre>
<p>
The service which is used to authorize the download, and to which the download relates.
</p>
<p class="since">Since 0.5.0</p>
</div>
</div>
</div>
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