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-<!--
- Licensed to the Apache Software Foundation (ASF) under one or more
- contributor license agreements. See the NOTICE file distributed with
- this work for additional information regarding copyright ownership.
- The ASF licenses this file to You under the Apache License, Version 2.0
- (the "License"); you may not use this file except in compliance with
- the License. You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
--->
-<html>
-
-<head>
-<meta http-equiv="Content-Language" content="en-us">
-<link rel="stylesheet" type="text/css" href="../stylesheets/style.css">
-<title>Get Task</title>
-</head>
-
-<body>
-
-<h2><a name="get">Get</a></h2>
-<h3>Description</h3>
-<p>Gets files from URLs. When the verbose option is &quot;on&quot;, this task
-displays a '.' for every 100 Kb retrieved. Any URL schema supported by
-the runtime is valid here, including http:, ftp: and jar:;
-</p>
-The <i>usetimestamp</i> option enables you to control downloads so that the remote file is
-only fetched if newer than the local copy. If there is no local copy, the download always takes
-place. When a file is downloaded, the timestamp of the downloaded file is set to the remote timestamp.
-NB: This timestamp facility only works on downloads using the HTTP protocol.
-<p>
-A username and password can be specified, in which case basic 'slightly encoded
-plain text' authentication is used. This is only secure over an HTTPS link.
-</p>
-
-<p><b>Proxies</b>. Since Apache Ant 1.7.0, Ant running on Java1.5 or later can
- <a href="../proxy.html">use the proxy settings of the operating
- system</a> if enabled with the
- <code>-autoproxy</code> option. There is also the
- <a href="../Tasks/setproxy.html">&lt;setproxy&gt;</a> task
- for earlier Java versions. With proxies turned
- on, <code>&lt;get&gt;</code> requests against localhost may not work
- as expected, if the request is relayed to the proxy.</p>
-
-<h3>Parameters</h3>
-<table border="1" cellpadding="2" cellspacing="0">
- <tr>
- <td valign="top"><b>Attribute</b></td>
- <td valign="top"><b>Description</b></td>
- <td align="center" valign="top"><b>Required</b></td>
- </tr>
- <tr>
- <td valign="top">src</td>
- <td valign="top">the URL from which to retrieve a file.</td>
- <td align="center" valign="top">Yes or a nested resource collection</td>
- </tr>
- <tr>
- <td valign="top">dest</td>
- <td valign="top">the file or directory where to store the
- retrieved file(s).</td>
- <td align="center" valign="top">Yes</td>
- </tr>
- <tr>
- <td valign="top">verbose</td>
- <td valign="top">show verbose progress information (&quot;on&quot;/&quot;off&quot;).</td>
- <td align="center" valign="top">No; default "false"</td>
- </tr>
- <tr>
- <td valign="top">quiet</td>
- <td valign="top">Log errors only.(&quot;true&quot;/&quot;false&quot;).</td>
- <td align="center" valign="top">No; default "false"</td>
- </tr>
- <tr>
- <td valign="top">ignoreerrors</td>
- <td valign="top">Log errors but don't treat as fatal.</td>
- <td align="center" valign="top">No; default "false"</td>
- </tr>
- <tr>
- <td valign="top">usetimestamp</td>
- <td valign="top">conditionally download a file based on the timestamp of the
- local copy. HTTP only</td>
- <td align="center" valign="top">No; default "false"</td>
- </tr>
- <tr>
- <td valign="top">username</td>
- <td valign="top">username for 'BASIC' http authentication</td>
- <td align="center" valign="top">if password is set</td>
- </tr>
- <tr>
- <td valign="top">password</td>
- <td valign="top">password: required </td>
- <td align="center" valign="top">if username is set</td>
- </tr>
- <tr>
- <td valign="top">maxtime</td>
- <td valign="top">Maximum time in seconds a single download may take,
- otherwise it will be interrupted and treated like a download
- error. <em>Since Ant 1.8.0</em></td>
- <td align="center" valign="top">No: default 0 which means no
- maximum time</td>
- </tr>
- <tr>
- <td valign="top">retries</td>
- <td valign="top">the per download number of retries on error<br/>
- <em>since Ant 1.8.0</em></td>
- <td align="center" valign="top">No; default "3"</td>
- </tr>
- <tr>
- <td valign="top">skipexisting</td>
- <td valign="top">skip files that already exist on the local filesystem<br/>
- <em>since Ant 1.8.0</em></td>
- <td align="center" valign="top">No; default "false"</td>
- </tr>
- <tr>
- <td valign="top">httpusecaches</td>
- <td valign="top">HTTP only - if true, allow caching at the
- HttpUrlConnection level. if false, turn caching off.<br/>
- <b>Note</b> this is only a hint to the underlying UrlConnection
- class, implementations and proxies are free to ignore the
- setting.</td>
- <td align="center" valign="top">No; default "true"</td>
- </tr>
- <tr>
- <td valign="top">useragent</td>
- <td valign="top">User-Agent HTTP header to send, starting with Ant
- 1.9.3 Ant will specify a User-Agent header of "Apache Ant VERSION"
- unless overridden by this attribute<br/>
- <em>since Ant 1.9.3</em></td>
- <td align="center" valign="top">No</td>
- </tr>
- <tr>
- <td valign="top">tryGzipEncoding</td>
- <td valign="top">When set to true Ant will tell the server it is
- willing to accept gzip encoding to reduce the amount of data to
- transfer and uncompress the content transparently.<br/>
- Setting this to true also means Ant will uncompress
- <code>.tar.gz</code> and similar files automatically.<br/>
- <em>since Ant 1.9.5</em></td>
- <td align="center" valign="top">No; default "false"</td>
-</table>
-<h3>Parameters specified as nested elements</h3>
-<h4>any resource collection</h4>
-
-<p><a href="../Types/resources.html#collection">Resource
- Collection</a>s are used to select groups of URLs to download. If
- the collection contains more than one resource, the dest attribute
- must point to a directory if it exists or a directory will be
- created if it doesn't exist. The destination file name use the
- last part of the path of the source URL unless you also specify a
- mapper.</p>
-
-<h4>mapper</h4>
-
-<p>You can define name transformations by using a
- nested <a href="../Types/mapper.html">mapper</a> element. You
- can also use any filenamemapper type in place of the mapper
- element.</p>
-
-<p>The mapper will receive the resource's name as argument. Any
- resource for which the mapper returns no or more than one mapped
- name will be skipped. If the returned name is a relative path, it
- will be considered relative to the <em>dest</em> attribute.</p>
-
-<h3>Examples</h3>
-<pre> &lt;get src=&quot;http://ant.apache.org/&quot; dest=&quot;help/index.html&quot;/&gt;</pre>
-<p>Gets the index page of http://ant.apache.org/, and stores it in the file <code>help/index.html</code>.</p>
-
-<pre> &lt;get src=&quot;http://www.apache.org/dist/ant/KEYS&quot;
- dest=&quot;KEYS&quot;
- verbose=&quot;true&quot;
- usetimestamp=&quot;true&quot;/&gt;</pre>
-<p>
-Gets the PGP keys of Ant's (current and past) release managers, if the local copy
-is missing or out of date. Uses the verbose option
-for progress information.
-</p>
-
-<pre> &lt;get src=&quot;https://insecure-bank.org/statement/user=1214&quot;
- dest=&quot;statement.html&quot;
- username="1214";
- password="secret"/&gt;</pre>
-<p>
-Fetches some file from a server with access control. Because https is being used the
-fact that basic auth sends passwords in plaintext is moot if you
-ignore the fact that it is part of your build file which may be
-readable by third parties. If you need more security, consider using
-the <a href="input.html">input task</a> to query for a password.</p>
-
-<p>Using a macro like the following</p>
-
-<pre>
- &lt;macrodef name="get-and-checksum">
- &lt;attribute name="url"/>
- &lt;attribute name="dest"/>
- &lt;sequential&gt;
- &lt;local name="destdir"/&gt;
- &lt;dirname property="destdir" file="@{dest}"/&gt;
- &lt;get dest="${destdir}"&gt;
- &lt;url url="@{url}"/&gt;
- &lt;url url="@{url}.sha1"/&gt;
- &lt;firstmatchmapper&gt;
- &lt;globmapper from="@{url}.sha1" to="@{dest}.sha"/&gt;
- &lt;globmapper from="@{url}" to="@{dest}"/&gt;
- &lt;/firstmatchmapper&gt;
- &lt;/get&gt;
- &lt;local name="checksum.matches"/>
- &lt;local name="checksum.matches.fail"/>
- &lt;checksum file="@{dest}" algorithm="sha" fileext=".sha"
- verifyproperty="checksum.matches"/>
- &lt;condition property="checksum.matches.fail">
- &lt;equals arg1="${checksum.matches}" arg2="false"/>
- &lt;/condition>
- &lt;fail if="checksum.matches.fail">Checksum error&lt;/fail>
- &lt;/sequential>
- &lt;/macrodef>
-</pre>
-
-<p>it is possible to download an artifacts together with its SHA1
- checksum (assuming a certain naming convention for the checksum
- file, of course) and validate the checksum on the fly.</p>
-
-<pre>
-&lt;get dest=&quot;downloads&quot;&gt;
- &lt;url url=&quot;http://ant.apache.org/index.html&quot;/&gt;
- &lt;url url=&quot;http://ant.apache.org/faq.html&quot;/&gt;
-&lt;/get&gt;
-</pre>
-<p>Gets the index and FAQ pages of http://ant.apache.org/, and stores
- them in the directory <code>downloads</code> which will be created if
- necessary.</p>
-</body>
-</html>
-