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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"

"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title>HTTP Request — cpp-netlib v0.9 documentation</title>

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<h1><a href="index.html">cpp-netlib v0.9 documentation</a></h1>

« <a href="reference_http_client.html" title="HTTP Client API">previous</a>

</div>

<h1>HTTP Request<a class="headerlink" href="#http-request" title="Permalink to this headline">¶</a></h1>

This part of the documentation talks about the publicly accessible API of the

HTTP Request objects. This section details the <a class="reference internal" href="#request-concepts">Request Concepts</a> requirements,

the implemented and required <a class="reference internal" href="#directives">Directives</a>, <a class="reference internal" href="#modifiers">Modifiers</a>, and <a class="reference internal" href="#wrappers">Wrappers</a> that work

with the HTTP Request objects.

<h2>Request Concepts<a class="headerlink" href="#request-concepts" title="Permalink to this headline">¶</a></h2>

There are two generally supported Request Concepts implemented in the library.

The first of two is the <a class="reference internal" href="#normal-client-request-concept">Normal Client Request Concept</a> and the second is the

<a class="reference internal" href="#pod-server-request-concept">Pod Server Request Concept</a>.

The <a class="reference internal" href="#normal-client-request-concept">Normal Client Request Concept</a> is what the HTTP Client interface requires.

All operations performed internally by the HTTP Client abide by the interface

required by this concept definition.

The <a class="reference internal" href="#pod-server-request-concept">Pod Server Request Concept</a> is as the name suggests what the HTTP Server

implementation requires from Request Objects.

Switching on whether the <cite>Request</cite> concept chooses either of the <a class="reference internal" href="#normal-client-request-concept">Normal Client

Request Concept</a> or the <a class="reference internal" href="#pod-server-request-concept">Pod Server Request Concept</a> is done through the

nested <tt class="docutils literal">tag</tt> type and whether that tag derives from the root tag <tt class="docutils literal">pod</tt>.

Simply, if the Request type’s nested <tt class="docutils literal">tag</tt> type derives from

<tt class="docutils literal">boost::network::tags::pod</tt> then it chooses to enforce the <a class="reference internal" href="#pod-server-request-concept">Pod Server Request

Concept</a>, otherwise it chooses the <a class="reference internal" href="#normal-client-request-concept">Normal Client Request Concept</a>.

<h3>Normal Client Request Concept<a class="headerlink" href="#normal-client-request-concept" title="Permalink to this headline">¶</a></h3>

A type models the Normal Client Request Concept if it models the <a class="reference external" href="message.html#message-concept">Message

Concept</a> and also supports the following constructs.

Legend

<tr class="field"><th class="field-name">R:</th><td class="field-body">The request type.</td>

</tr>

<tr class="field"><th class="field-name">r:</th><td class="field-body">An instance of R.</td>

</tr>

<tr class="field"><th class="field-name">S:</th><td class="field-body">The string type.</td>

</tr>

<tr class="field"><th class="field-name">s:</th><td class="field-body">An instance of S.</td>

</tr>

</tr>

<tr class="field"><th class="field-name">p:</th><td class="field-body">An instance of P.</td>

</tr>

</tbody>

</table>

</colgroup>

<tr><th class="head">Construct</th>

<th class="head">Result</th>

<th class="head">Description</th>

</tr>

</thead>

<tr><td><tt class="docutils literal">R::string_type</tt></td>

<td>The nested <tt class="docutils literal">string_type</tt> type.</td>

</tr>

<td>The nested <tt class="docutils literal">port_type</tt> type.</td>

</tr>

<td>Construct a Request with an <tt class="docutils literal">s</tt>

provided. This treats <tt class="docutils literal">s</tt> as the URI

to where the request is destined for.</td>

</tr>

<tr><td><tt class="docutils literal">host(request)</tt></td>

<td>Convertible

to <tt class="docutils literal">S</tt></td>

<td>Return the host to where the request

is destined for.</td>

</tr>

<tr><td><tt class="docutils literal">port(request)</tt></td>

<td>Convertible

to <tt class="docutils literal">P</tt></td>

<td>Return the port to where the request

is destined for.</td>

</tr>

<tr><td><tt class="docutils literal">path(request)</tt></td>

<td>Convertible

to <tt class="docutils literal">S</tt></td>

<td>Return the path included in the URI.</td>

</tr>

<tr><td><tt class="docutils literal">query(request)</tt></td>

<td>Convertible

to <tt class="docutils literal">S</tt></td>

<td>Return the query part of the URI.</td>

</tr>

<tr><td><tt class="docutils literal">anchor(request)</tt></td>

<td>Convertible

to <tt class="docutils literal">S</tt></td>

<td>Return the anchor part of the URI.</td>

</tr>

<tr><td><tt class="docutils literal">protocol(request)</tt></td>

<td>Convertible

to <tt class="docutils literal">S</tt></td>

<td>Return the protocol/scheme part of the

URI.</td>

</tr>

<td>Set the URI of the request.</td>

</tr>

<td>Set the URI of the request.</td>

</tr>

</tbody>

</table>

</div>

<h3>Pod Server Request Concept<a class="headerlink" href="#pod-server-request-concept" title="Permalink to this headline">¶</a></h3>

A type models the Pod Server Request Concept if it models the <a class="reference external" href="message.html#message-concept">Message Concept</a>

and also supports the following constructs.

Legend

<tr class="field"><th class="field-name">R:</th><td class="field-body">The request type.</td>

</tr>

<tr class="field"><th class="field-name">r:</th><td class="field-body">An instance of R.</td>

</tr>

<tr class="field"><th class="field-name">S:</th><td class="field-body">The string type.</td>

</tr>

<tr class="field"><th class="field-name">I:</th><td class="field-body">An unsigned 8 bit integer.</td>

</tr>

<tr class="field"><th class="field-name">V:</th><td class="field-body">The vector type for headers.</td>

</tr>

</tbody>

</table>

</colgroup>

<tr><th class="head">Construct</th>

<th class="head">Result</th>

<th class="head">Description</th>

</tr>

</thead>

<tr><td><tt class="docutils literal">R::string_type</tt></td>

<td>The nested <tt class="docutils literal">string_type</tt> type.</td>

</tr>

<tr><td><tt class="docutils literal">R::headers_container_type</tt></td>

<td>The nested

<tt class="docutils literal">headers_container_type</tt> type.</td>

</tr>

<tr><td><tt class="docutils literal">r.source</tt></td>

<td>The nested source of the request.</td>

</tr>

<tr><td><tt class="docutils literal">r.method</tt></td>

<td>The method of the request.</td>

</tr>

<tr><td><tt class="docutils literal">r.destination</tt></td>

<td>The destination of the request.

This is normally the URI of the

request.</td>

</tr>

<tr><td><tt class="docutils literal">r.version_major</tt></td>

<td>The major version number part of

the request.</td>

</tr>

<tr><td><tt class="docutils literal">r.version_minor</tt></td>

<td>The minor version number part of

the request.</td>

</tr>

<tr><td><tt class="docutils literal">r.headers</tt></td>

<td>The vector of headers.</td>

</tr>

<td>The body of the request.</td>

</tr>

</tbody>

</table>

</div>

<h2>Directives<a class="headerlink" href="#directives" title="Permalink to this headline">¶</a></h2>

This section details the provided directives that are provided by

<tt class="xref py py-mod docutils literal">cpp-netlib</tt>. The section was written to assume that an appropriately

constructed request instance is either of the following:

<div class="highlight-c++"><div class="highlight"><pre>boost::network::http::basic_request<

boost::network::http::tags::http_default_8bit_udp_resolve

> request;

// or

> request;

</pre></div>

</div>

The section also assumes that there following using namespace declaration is in

effect:

<div class="highlight-c++"><div class="highlight"><pre>using namespace boost::network;

</pre></div>

</div>

Directives are meant to be used in the following manner:

<div class="highlight-c++"><div class="highlight"><pre>request << directive(...);

</pre></div>

</div>

Warning

There are two versions of directives, those that are applicable to

messages that support narrow strings (<tt class="docutils literal">std::string</tt>) and those that are

applicable to messages that support wide strings (<tt class="docutils literal">std::wstring</tt>). The

<tt class="xref py py-mod docutils literal">cpp-netlib</tt> implementation still does not convert wide strings into

UTF-8 encoded narrow strings. This will be implemented in subsequent

library releases.

For now all the implemented directives are listed, even if some of them still

do not implement things correctly.

</div>

<dt>unspecified <tt class="docutils literal">source(std::string const & source_)</tt></dt>

<dd>Create a source directive with a <tt class="docutils literal">std::string</tt> as a parameter, to be set

as the source of the request.</dd>

<dt>unspecified <tt class="docutils literal">source(std::wstring const & source_)</tt></dt>

<dd>Create a source directive with a <tt class="docutils literal">std::wstring</tt> as a parameter, to be set

as the source of the request.</dd>

<dt>unspecified <tt class="docutils literal">destination(std::string const & source_)</tt></dt>

<dd>Create a destination directive with a <tt class="docutils literal">std::string</tt> as a parameter, to be

set as the destination of the request.</dd>

<dt>unspecified <tt class="docutils literal">destination(std::wstring const & source_)</tt></dt>

<dd>Create a destination directive with a <tt class="docutils literal">std::wstring</tt> as a parameter, to be

set as the destination of the request.</dd>

<dt>unspecified <tt class="docutils literal">header(std::string const & name, std::string const & value)</tt></dt>

<dd>Create a header directive that will add the given name and value pair to the

headers already associated with the request. In this case the name and

values are both <tt class="docutils literal">std::string</tt>.</dd>

<dt>unspecified <tt class="docutils literal">header(std::wstring const & name, std::wstring const & value)</tt></dt>

<dd>Create a header directive that will add the given name and value pair to the

headers already associated with the request. In this case the name and

values are both <tt class="docutils literal">std::wstring</tt>.</dd>

<dt>unspecified <tt class="docutils literal">remove_header(std::string const & name)</tt></dt>

<dd>Create a remove_header directive that will remove all the occurences of the

given name from the headers already associated with the request. In this

case the name of the header is of type <tt class="docutils literal">std::string</tt>.</dd>

<dt>unspecified <tt class="docutils literal">remove_header(std::wstring const & name)</tt></dt>

<dd>Create a remove_header directive that will remove all the occurences of the

given name from the headers already associated with the request. In this

case the name of the header is of type <tt class="docutils literal">std::wstring</tt>.</dd>

<dt>unspecified <tt class="docutils literal">body(std::string const & body_)</tt></dt>

<dd>Create a body directive that will set the request’s body to the given

parameter. In this case the type of the body is an <tt class="docutils literal">std::string</tt>.</dd>

<dt>unspecified <tt class="docutils literal">body(std::wstring const & body_)</tt></dt>

<dd>Create a body directive that will set the request’s body to the given

parameter. In this case the type of the body is an <tt class="docutils literal">std::wstring</tt>.</dd>

</dl>

</div>

<h2>Modifiers<a class="headerlink" href="#modifiers" title="Permalink to this headline">¶</a></h2>

This section details the provided modifiers that are provided by

<tt class="xref py py-mod docutils literal">cpp-netlib</tt>.

<dt><tt class="docutils literal">template <class Tag> inline void source(basic_request<Tag> & request, typename string<Tag>::type const & source_)</tt></dt>

<dd>Modifies the source of the given <tt class="docutils literal">request</tt>. The type of <tt class="docutils literal">source_</tt> is

dependent on the <tt class="docutils literal">Tag</tt> specialization of <tt class="docutils literal">basic_request</tt>.</dd>

<dt><tt class="docutils literal">template <class Tag> inline void destination(basic_request<Tag> & request, typename string<Tag>::type const & destination_)</tt></dt>

<dd>Modifies the destination of the given <tt class="docutils literal">request</tt>. The type of <tt class="docutils literal">destination_</tt> is

dependent on the <tt class="docutils literal">Tag</tt> specialization of <tt class="docutils literal">basic_request</tt>.</dd>

<dt><tt class="docutils literal">template <class Tag> inline void add_header(basic_request<Tag> & request, typename string<Tag>::type const & name, typename string<Tag>::type const & value)</tt></dt>

<dd>Adds a header to the given <tt class="docutils literal">request</tt>. The type of the <tt class="docutils literal">name</tt> and

<tt class="docutils literal">value</tt> parameters are dependent on the <tt class="docutils literal">Tag</tt> specialization of

<tt class="docutils literal">basic_request</tt>.</dd>

<dt><tt class="docutils literal">template <class Tag> inline void remove_header(basic_request<Tag> & request, typename string<Tag>::type const & name)</tt></dt>

<dd>Removes a header from the given <tt class="docutils literal">request</tt>. The type of the <tt class="docutils literal">name</tt>

parameter is dependent on the <tt class="docutils literal">Tag</tt> specialization of <tt class="docutils literal">basic_request</tt>.</dd>

<dd>Removes all headers from the given <tt class="docutils literal">request</tt>.</dd>

<dt><tt class="docutils literal">template <class Tag> inline void body(basic_request<Tag> & request, typename string<Tag>::type const & body_)</tt></dt>

<dd>Modifies the body of the given <tt class="docutils literal">request</tt>. The type of <tt class="docutils literal">body_</tt> is

dependent on the <tt class="docutils literal">Tag</tt> specialization of <tt class="docutils literal">basic_request</tt>.</dd>

</dl>

</div>

<h2>Wrappers<a class="headerlink" href="#wrappers" title="Permalink to this headline">¶</a></h2>

This section details the provided request wrappers that come with

<tt class="xref py py-mod docutils literal">cpp-netlib</tt>. Wrappers are used to convert a message into a different type,

usually providing accessor operations to retrieve just part of the message. This

section assumes that the following using namespace directives are in

effect:

using namespace boost::network::http;

</pre></div>

</div>

<dt><tt class="docutils literal">template <class Tag></tt> unspecified <tt class="docutils literal">source(basic_request<Tag> const & request)</tt></dt>

<dd>Returns a wrapper convertible to <tt class="docutils literal">typename string<Tag>::type</tt> that

provides the source of a given request.</dd>

<dt><tt class="docutils literal">template <class Tag></tt> unspecified <tt class="docutils literal">destination(basic_request<Tag> const & request)</tt></dt>

<dd>Returns a wrapper convertible to <tt class="docutils literal">typename string<Tag>::type</tt> that

provides the destination of a given request.</dd>

<dt><tt class="docutils literal">template <class Tag></tt> unspecified <tt class="docutils literal">headers(basic_request<Tag> const & request)</tt></dt>

<dd>Returns a wrapper convertible to <tt class="docutils literal">typename headers_range<basic_request<Tag>

>::type</tt> or <tt class="docutils literal">typename basic_request<Tag>::headers_container_type</tt> that

provides the headers of a given request.</dd>

<dt><tt class="docutils literal">template <class Tag></tt> unspecified <tt class="docutils literal">body(basic_request<Tag> const & request)</tt></dt>

<dd>Returns a wrapper convertible to <tt class="docutils literal">typename string<Tag>::type</tt> that

provides the body of a given request.</dd>

</dl>

</div>

<h3><a href="index.html">Table Of Contents</a></h3>

<ul>

<li><a class="reference internal" href="#">HTTP Request</a><ul>

<li><a class="reference internal" href="#request-concepts">Request Concepts</a><ul>

<li><a class="reference internal" href="#normal-client-request-concept">Normal Client Request Concept</a></li>

<li><a class="reference internal" href="#pod-server-request-concept">Pod Server Request Concept</a></li>

</ul>

</li>

<li><a class="reference internal" href="#directives">Directives</a></li>

<li><a class="reference internal" href="#modifiers">Modifiers</a></li>

<li><a class="reference internal" href="#wrappers">Wrappers</a></li>

</ul>

</li>

</ul>

<h3>Browse</h3>

<ul>

<li>Prev: <a href="reference_http_client.html">HTTP Client API</a></li>

<li>Next: <a href="reference_http_response.html">HTTP Response</a></li>

</ul>

<ul>

<li>

<a href="index.html">cpp-netlib v0.9 documentation</a>

<ul><li><a href="reference.html">Reference Manual</a>

<ul><li>HTTP Request</li></ul>

</li></ul>

</li>

</ul>

<li><a href="_sources/reference_http_request.txt"

rel="nofollow">Show Source</a></li>

</ul>

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