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<a name="URL-Manipulation"></a>
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<p>
Next: <a href="Base64-and-Binary-Data-Transmission.html#Base64-and-Binary-Data-Transmission" accesskey="n" rel="next">Base64 and Binary Data Transmission</a>, Previous: <a href="FTP-Objects.html#FTP-Objects" accesskey="p" rel="prev">FTP Objects</a>, Up: <a href="Networking-Utilities.html#Networking-Utilities" accesskey="u" rel="up">Networking Utilities</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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<hr>
<a name="URL-Manipulation-1"></a>
<h4 class="subsection">36.4.2 URL Manipulation</h4>
<a name="XREFurlread"></a><dl>
<dt><a name="index-urlread"></a>Loadable Function: <em><var>s</var> =</em> <strong>urlread</strong> <em>(<var>url</var>)</em></dt>
<dt><a name="index-urlread-1"></a>Loadable Function: <em>[<var>s</var>, <var>success</var>] =</em> <strong>urlread</strong> <em>(<var>url</var>)</em></dt>
<dt><a name="index-urlread-2"></a>Loadable Function: <em>[<var>s</var>, <var>success</var>, <var>message</var>] =</em> <strong>urlread</strong> <em>(<var>url</var>)</em></dt>
<dt><a name="index-urlread-3"></a>Loadable Function: <em>[…] =</em> <strong>urlread</strong> <em>(<var>url</var>, <var>method</var>, <var>param</var>)</em></dt>
<dd><p>Download a remote file specified by its <var>url</var> and return its content
in string <var>s</var>. For example:
</p>
<div class="example">
<pre class="example">s = urlread ("ftp://ftp.octave.org/pub/octave/README");
</pre></div>
<p>The variable <var>success</var> is 1 if the download was successful,
otherwise it is 0 in which case <var>message</var> contains an error
message. If no output argument is specified and an error occurs,
then the error is signaled through Octave’s error handling mechanism.
</p>
<p>This function uses libcurl. Curl supports, among others, the HTTP,
FTP and FILE protocols. Username and password may be specified in the
URL. For example:
</p>
<div class="example">
<pre class="example">s = urlread ("http://user:password@example.com/file.txt");
</pre></div>
<p>GET and POST requests can be specified by <var>method</var> and <var>param</var>.
The parameter <var>method</var> is either ‘<samp>get</samp>’ or ‘<samp>post</samp>’
and <var>param</var> is a cell array of parameter and value pairs.
For example:
</p>
<div class="example">
<pre class="example">s = urlread ("http://www.google.com/search", "get",
{"query", "octave"});
</pre></div>
<p><strong>See also:</strong> <a href="#XREFurlwrite">urlwrite</a>.
</p></dd></dl>
<a name="XREFurlwrite"></a><dl>
<dt><a name="index-urlwrite"></a>Loadable Function: <em></em> <strong>urlwrite</strong> <em>(<var>url</var>, <var>localfile</var>)</em></dt>
<dt><a name="index-urlwrite-1"></a>Loadable Function: <em><var>f</var> =</em> <strong>urlwrite</strong> <em>(<var>url</var>, <var>localfile</var>)</em></dt>
<dt><a name="index-urlwrite-2"></a>Loadable Function: <em>[<var>f</var>, <var>success</var>] =</em> <strong>urlwrite</strong> <em>(<var>url</var>, <var>localfile</var>)</em></dt>
<dt><a name="index-urlwrite-3"></a>Loadable Function: <em>[<var>f</var>, <var>success</var>, <var>message</var>] =</em> <strong>urlwrite</strong> <em>(<var>url</var>, <var>localfile</var>)</em></dt>
<dd><p>Download a remote file specified by its <var>url</var> and save it as
<var>localfile</var>. For example:
</p>
<div class="example">
<pre class="example">urlwrite ("ftp://ftp.octave.org/pub/octave/README",
"README.txt");
</pre></div>
<p>The full path of the downloaded file is returned in <var>f</var>. The
variable <var>success</var> is 1 if the download was successful,
otherwise it is 0 in which case <var>message</var> contains an error
message. If no output argument is specified and an error occurs,
then the error is signaled through Octave’s error handling mechanism.
</p>
<p>This function uses libcurl. Curl supports, among others, the HTTP,
FTP and FILE protocols. Username and password may be specified in
the URL, for example:
</p>
<div class="example">
<pre class="example">urlwrite ("http://username:password@example.com/file.txt",
"file.txt");
</pre></div>
<p>GET and POST requests can be specified by <var>method</var> and <var>param</var>.
The parameter <var>method</var> is either ‘<samp>get</samp>’ or ‘<samp>post</samp>’
and <var>param</var> is a cell array of parameter and value pairs.
For example:
</p>
<div class="example">
<pre class="example">urlwrite ("http://www.google.com/search", "search.html",
"get", {"query", "octave"});
</pre></div>
<p><strong>See also:</strong> <a href="#XREFurlread">urlread</a>.
</p></dd></dl>
<hr>
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<p>
Next: <a href="Base64-and-Binary-Data-Transmission.html#Base64-and-Binary-Data-Transmission" accesskey="n" rel="next">Base64 and Binary Data Transmission</a>, Previous: <a href="FTP-Objects.html#FTP-Objects" accesskey="p" rel="prev">FTP Objects</a>, Up: <a href="Networking-Utilities.html#Networking-Utilities" accesskey="u" rel="up">Networking Utilities</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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