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<div class="subTitle">org.osgi.service.http</div>
<h2 title="Interface HttpService" class="title">Interface HttpService</h2>
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<pre>public interface <span class="typeNameLabel">HttpService</span></pre>
<div class="block">The Http Service allows other bundles in the OSGi environment to dynamically
register resources and servlets into the URI namespace of Http Service. A
bundle may later unregister its resources or servlets.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../org/osgi/service/http/HttpContext.html" title="interface in org.osgi.service.http"><code>HttpContext</code></a></dd>
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<h3>Method Summary</h3>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd"> </span></span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code><a href="../../../../org/osgi/service/http/HttpContext.html" title="interface in org.osgi.service.http">HttpContext</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/osgi/service/http/HttpService.html#createDefaultHttpContext--">createDefaultHttpContext</a></span>()</code>
<div class="block">Creates a default <code>HttpContext</code> for registering servlets or
resources with the HttpService, a new <code>HttpContext</code> object is
created each time this method is called.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/osgi/service/http/HttpService.html#registerResources-java.lang.String-java.lang.String-org.osgi.service.http.HttpContext-">registerResources</a></span>(java.lang.String alias,
java.lang.String name,
<a href="../../../../org/osgi/service/http/HttpContext.html" title="interface in org.osgi.service.http">HttpContext</a> context)</code>
<div class="block">Registers resources into the URI namespace.</div>
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<tr id="i2" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/osgi/service/http/HttpService.html#registerServlet-java.lang.String-javax.servlet.Servlet-java.util.Dictionary-org.osgi.service.http.HttpContext-">registerServlet</a></span>(java.lang.String alias,
javax.servlet.Servlet servlet,
java.util.Dictionary initparams,
<a href="../../../../org/osgi/service/http/HttpContext.html" title="interface in org.osgi.service.http">HttpContext</a> context)</code>
<div class="block">Registers a servlet into the URI namespace.</div>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/osgi/service/http/HttpService.html#unregister-java.lang.String-">unregister</a></span>(java.lang.String alias)</code>
<div class="block">Unregisters a previous registration done by <code>registerServlet</code> or
<code>registerResources</code> methods.</div>
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<h4>registerServlet</h4>
<pre>void registerServlet(java.lang.String alias,
javax.servlet.Servlet servlet,
java.util.Dictionary initparams,
<a href="../../../../org/osgi/service/http/HttpContext.html" title="interface in org.osgi.service.http">HttpContext</a> context)
throws javax.servlet.ServletException,
<a href="../../../../org/osgi/service/http/NamespaceException.html" title="class in org.osgi.service.http">NamespaceException</a></pre>
<div class="block">Registers a servlet into the URI namespace.
<p>
The alias is the name in the URI namespace of the Http Service at which
the registration will be mapped.
<p>
An alias must begin with slash ('/') and must not end with slash ('/'),
with the exception that an alias of the form "/" is used to
denote the root alias. See the specification text for details on how HTTP
requests are mapped to servlet and resource registrations.
<p>
The Http Service will call the servlet's <code>init</code> method before
returning.
<pre>
httpService.registerServlet("/myservlet", servlet, initparams, context);
</pre>
<p>
Servlets registered with the same <code>HttpContext</code> object will share
the same <code>ServletContext</code>. The Http Service will call the
<code>context</code> argument to support the <code>ServletContext</code> methods
<code>getResource</code>,<code>getResourceAsStream</code> and <code>getMimeType</code>,
and to handle security for requests. If the <code>context</code> argument is
<code>null</code>, a default <code>HttpContext</code> object is used (see
<a href="../../../../org/osgi/service/http/HttpService.html#createDefaultHttpContext--"><code>createDefaultHttpContext()</code></a>).</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>alias</code> - name in the URI namespace at which the servlet is registered</dd>
<dd><code>servlet</code> - the servlet object to register</dd>
<dd><code>initparams</code> - initialization arguments for the servlet or
<code>null</code> if there are none. This argument is used by the
servlet's <code>ServletConfig</code> object.</dd>
<dd><code>context</code> - the <code>HttpContext</code> object for the registered servlet,
or <code>null</code> if a default <code>HttpContext</code> is to be created
and used.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../org/osgi/service/http/NamespaceException.html" title="class in org.osgi.service.http">NamespaceException</a></code> - if the registration fails because the alias is
already in use.</dd>
<dd><code>javax.servlet.ServletException</code> - if the servlet's <code>init</code>
method throws an exception, or the given servlet object has
already been registered at a different alias.</dd>
<dd><code>java.lang.IllegalArgumentException</code> - if any of the arguments are
invalid</dd>
</dl>
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<h4>registerResources</h4>
<pre>void registerResources(java.lang.String alias,
java.lang.String name,
<a href="../../../../org/osgi/service/http/HttpContext.html" title="interface in org.osgi.service.http">HttpContext</a> context)
throws <a href="../../../../org/osgi/service/http/NamespaceException.html" title="class in org.osgi.service.http">NamespaceException</a></pre>
<div class="block">Registers resources into the URI namespace.
<p>
The alias is the name in the URI namespace of the Http Service at which
the registration will be mapped. An alias must begin with slash ('/') and
must not end with slash ('/'), with the exception that an alias of the
form "/" is used to denote the root alias. The name parameter
must also not end with slash ('/') with the exception that a name of the
form "/" is used to denote the root of the bundle. See the
specification text for details on how HTTP requests are mapped to servlet
and resource registrations.
<p>
For example, suppose the resource name /tmp is registered to the alias
/files. A request for /files/foo.txt will map to the resource name
/tmp/foo.txt.
<pre>
httpservice.registerResources("/files", "/tmp", context);
</pre>
The Http Service will call the <code>HttpContext</code> argument to map
resource names to URLs and MIME types and to handle security for
requests. If the <code>HttpContext</code> argument is <code>null</code>, a default
<code>HttpContext</code> is used (see <a href="../../../../org/osgi/service/http/HttpService.html#createDefaultHttpContext--"><code>createDefaultHttpContext()</code></a>).</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>alias</code> - name in the URI namespace at which the resources are
registered</dd>
<dd><code>name</code> - the base name of the resources that will be registered</dd>
<dd><code>context</code> - the <code>HttpContext</code> object for the registered
resources, or <code>null</code> if a default <code>HttpContext</code> is to
be created and used.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../org/osgi/service/http/NamespaceException.html" title="class in org.osgi.service.http">NamespaceException</a></code> - if the registration fails because the alias is
already in use.</dd>
<dd><code>java.lang.IllegalArgumentException</code> - if any of the parameters are
invalid</dd>
</dl>
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<h4>unregister</h4>
<pre>void unregister(java.lang.String alias)</pre>
<div class="block">Unregisters a previous registration done by <code>registerServlet</code> or
<code>registerResources</code> methods.
<p>
After this call, the registered alias in the URI name-space will no
longer be available. If the registration was for a servlet, the Http
Service must call the <code>destroy</code> method of the servlet before
returning.
<p>
If the bundle which performed the registration is stopped or otherwise
"unget"s the Http Service without calling <a href="../../../../org/osgi/service/http/HttpService.html#unregister-java.lang.String-"><code>unregister(String)</code></a>
then Http Service must automatically unregister the registration.
However, if the registration was for a servlet, the <code>destroy</code>
method of the servlet will not be called in this case since the bundle
may be stopped. <a href="../../../../org/osgi/service/http/HttpService.html#unregister-java.lang.String-"><code>unregister(String)</code></a> must be explicitly called to
cause the <code>destroy</code> method of the servlet to be called. This can be
done in the <code>BundleActivator.stop</code> method of the bundle registering
the servlet.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>alias</code> - name in the URI name-space of the registration to unregister</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if there is no registration
for the alias or the calling bundle was not the bundle which
registered the alias.</dd>
</dl>
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<h4>createDefaultHttpContext</h4>
<pre><a href="../../../../org/osgi/service/http/HttpContext.html" title="interface in org.osgi.service.http">HttpContext</a> createDefaultHttpContext()</pre>
<div class="block">Creates a default <code>HttpContext</code> for registering servlets or
resources with the HttpService, a new <code>HttpContext</code> object is
created each time this method is called.
<p>
The behavior of the methods on the default <code>HttpContext</code> is defined
as follows:
<ul>
<li><code>getMimeType</code> - Does not define any customized MIME types for
the Content-Type header in the response, and always returns <code>null</code>.
</li>
<li><code>handleSecurity</code> - Performs implementation-defined
authentication on the request.</li>
<li><code>getResource</code> - Assumes the named resource is in the context
bundle; this method calls the context bundle's <code>Bundle.getResource</code>
method, and returns the appropriate URL to access the resource. On a Java
runtime environment that supports permissions, the Http Service needs to
be granted <code>org.osgi.framework.AdminPermission[*,RESOURCE]</code>.</li>
</ul></div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a default <code>HttpContext</code> object.</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.1</dd>
</dl>
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