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<html><head>
<title>FBB::MailHeaders</title>
<link rev="made" href="mailto:Frank B. Brokken: f.b.brokken@rug.nl">
</head>
<body text="#27408B" bgcolor="#FFFAF0">
<hr>
<h1>FBB::MailHeaders</h1>
<h2>libbobcat1-dev_2.20.01-x.tar.gz</h2>
<h2>2005-2011</h2>

<html><head>
<link rev="made" href="mailto:Frank B. Brokken: f.b.brokken@rug.nl">
</head>
<body text="#27408B" bgcolor="#FFFAF0">
<hr>
<h1></h1>

<html><head>
<title>FBB::MailHeaders(3bobcat)</title>
<link rev="made" href="mailto:Frank B. Brokken: f.b.brokken@rug.nl">
</head>
<body text="#27408B" bgcolor="#FFFAF0">
<hr>
<h1>FBB::MailHeaders(3bobcat)</h1>
<h2>libbobcat1-dev_2.20.01-x.tar.gz SMTP Mail Headers</h2>
<h2>2005-2011</h2>


<p>
<h2>NAME</h2>FBB::MailHeaders - Handles SMTP Mail Headers
<p>
<h2>SYNOPSIS</h2>
    <strong>#include &lt;bobcat/mailheaders&gt;</strong><br>
    Linking option: <em>-lbobcat</em> 
<p>
<h2>DESCRIPTION</h2>
<p>
<strong>FBB::MailHeaders</strong> objects extract header lines from e-mail. Reading
stops at (and including) the first blank line, which becomes the last element
of the <strong>FBB::MailHeaders</strong> object, interpreted as a <strong>vector</strong>. The actual
e-mail content is therefore left unread on the file containing the e-mail.
<p>
Each line stored in a <strong>MailHeaders</strong> object represents a complete header
line. Headers continuing over multiple input lines are concatenated to a
single line retrievable from <strong>MailHeaders</strong> objects, separated from each
other by <em>'\n'</em> (newline) characters. The last line to join a multi-line
header is not terminated by a newline character.
<p>
<h2>NAMESPACE</h2>
    <strong>FBB</strong><br>
    All constructors, members, operators and manipulators, mentioned in this
man-page, are defined in the namespace <strong>FBB</strong>.
<p>
<h2>INHERITS FROM</h2>
    -
<p>
<h2>ENUMERATIONS</h2>
    The following enumerations and enumeration values can be used with the
class <strong>FBB::MailHeaders</strong>:
<p>
<strong>enum Mode</strong><br>
    This enumeration defines two values:
    <ul>
    <li> <strong>READ</strong>:<br>
        When this value is specified at construction time, e-mail is
immediately read by the constructor.
    <li> <strong>DONT_READ</strong>:<br>
        When this value is specified at construction time, e-mail is read
using the <em>read</em> member (see below).
    </ul>
<p>
<strong>enum Match</strong><br>
    This enumeration defines the following values:
    <ul>
    <li> <strong>FULL</strong>:<br>
    Used by  <em>setHeaderIterator</em> (see below) to indicate that the
headers must exactly match a specified header name.
    <li> <strong>INITIAL</strong>:<br>
    Used by  <em>setHeaderIterator</em> (see below) to indicate that the
initial part of the headers must match the specified header text.
    <li> <strong>PARTIAL</strong>:<br>
    Used by  <em>setHeaderIterator</em> (see below) to indicate that the 
headers must contain the specified header text.
    <li> <strong>CASE_FULL</strong>:<br>
    Used by <em>setHeaderIterator</em> (see below) to indicate that the
headers must exactly match a specified header name. The matching is performed
case insensititvely.
    <li> <strong>CASE_INITIAL</strong>:<br>
    Used by <em>setHeaderIterator</em> (see below) to indicate that the
initial part of the headers must match the specified header text. The matching
is performed case insensititvely.
    <li> <strong>CASE_PARTIAL</strong>:<br>
    Used by <em>setHeaderIterator</em> (see below) to indicate that the
headers must contain the specified header text. The matching is performed case
insensititvely.
    </ul>
<p>
<h2>NESTED TYPES</h2>
<p>
The class <em>MailHeaders</em> defines the following types:
    <ul>
    <li> <strong>const_iterator</strong>:<br>
    An input iterator returned by <em>begin</em> and <em>end</em> (see
below)
    <li> <strong>const_reverse_iterator</strong>:<br>
    An reverse input iterator returned by the members <em>rbegin</em> and
<em>rend</em> (see below)
    </ul>
    <li> <strong>const_hdr_iterator</strong>:<br>
    An input iterator returned by the members <em>beginh</em> and <em>endh</em> (see
below)
    <li> <strong>const_reverse_hdr_iterator</strong>:<br>
    An reverse input iterator returned by the members <em>rbeginh</em> and
<em>rendh</em> (see below)
    )
    Objects of these two iterator types point to header lines. Their
derefenced type is <em>std::string</em>.
<p>
<h2>CONSTRUCTORS</h2>
    <ul>
    <li> <strong>MailHeaders(std::istream &amp;in, Mode mode = READ)</strong>:<br> 
    This constructor defines the file containing the e-mail to be
processed. The second parameter is by default <strong>MailHeaders::READ</strong>, causing
the object to start reading the e-mail immediately. If set to
<strong>MailHeaders::DONT_READ</strong>, the e-mail is not read. In that case the member
<em>read</em> can be called to process the e-mail later.
    </ul>
    The copy and move constructors are available.
<p>
<h2>OVERLOADED OPERATORS</h2>
<p>
<ul>
    <li> <strong>std::string const &amp;operator[](size_t idx) const</strong>:<br>
    Returns the <em>idx</em>-th header line
    </ul>
    The move assignment operator is available
<p>
<h2>MEMBER FUNCTIONS</h2>
<p>
<ul>
    <li> <strong>const_iterator begin() const</strong>:<br>
    Returns an iterator to the first line of the mail headers.
<p>
<li> <strong>const_hdr_iterator beginh() const</strong>:<br>
    Returns the begin-iterator corresponding to the first header selected by
the <em>setHeaderIterator</em> member. 
<p>
<li> <strong>const_iterator end() const</strong>:<br>
    Returns an iterator beyond the last line of the mail headers.
<p>
<li> <strong>const_hdr_iterator endh() const</strong>:<br>
    Returns the end-iterator matching <em>beginh</em>.  Note that the member
function's name ends in <em>h</em>, to distinguish it from the
<em>vector&lt;string&gt;::end</em> member.
<p>
<li> <strong>const_reverse_iterator rbegin() const</strong>:<br>
    Returns an iterator to the last line of the mail headers.
<p>
<li> <strong>const_reverse_hdr_iterator rbeginh() const</strong>:<br>
    Returns the reversed begin-iterator corresponding to the last header
selected by the <em>setHeaderIterator</em> member.  
<p>
<li> <strong>void read()</strong>:<br> 
    Reads the mail-headers from the file passed to the <strong>FBB::MailHeaders</strong>
object's constructor. An <strong>FBB::Errno</strong> object is thrown if the mailheaders
were already read or if the file is incomplete (i.e., the (obligatory) blank
line wasn't found).
<p>
<li> <strong>const_iterator rend() const</strong>:<br>
    Returns an iterator before the first line of the mail headers.
<p>
<li> <strong>const_reverse_hdr_iterator rendh() const</strong>:<br>
    Returns the reversed end-iterator matching <em>rbeginh</em>. 
<p>
<li> <strong>void setHeaderIterator(char const *header, Match match = FULL)</strong>:<br>
    Sets the header-iterators to the specified <em>header</em>. The parameter
<em>match</em> defines the match-type to use when selecting headers. The default
<strong>FBB::MailHeaders::FULL</strong>, indicates that the text provided in
<em>header</em> must match exactly an e-mail header. <br>
    When matching headers the
colon terminating the header is <em>not</em> considered and should therefore
<em>not</em> be specified by <em>setHeaderIterator</em>. <br>
    Alternative matching strategies are used when other values of 
the enumeration <strong>FBB::Match</strong> are specified.<br>
    The member <em>setHeaderIterator</em> <em>must</em> have been called at least once
or the members <em>beginh</em> and <em>rendh</em> will throw an <strong>FBB::Errno</strong>
exception. An <strong>FBB::Errno</strong> exception is also thrown if
<em>setHeaderIterator</em> is called when no mail headers are available.
<p>
<li> <strong>size_t size() const</strong>:<br>
    Returns the number of header lines
    </ul>
<p>
<h2>EXAMPLE</h2>
    The following example shows the normal use of these members:
        <pre>

                // create a MailHeader object
    MailHeaders mh(cin, MailHeaders::DONT_READ);

    try
    {           // read the headers
        mh.read();
    }
    catch (Errno &amp;err)
    {
        cout &lt;&lt; err.what() &lt;&lt; endl;
    }

    cout &lt;&lt; "There are " &lt;&lt; mh.size() &lt;&lt; " header lines\n";

                // look for the Received: headers    
    mh.setHeaderIterator("Received");

                // show the Received headers
    copy(mh.beginh(), mh.endh(), 
            ostream_iterator&lt;std::string const&gt;(cout, "\n"));
    
</pre>

<p>
<h2>FILES</h2>
    <em>bobcat/mailheaders</em> - defines the class interface
<p>
<h2>SEE ALSO</h2>
    <strong>bobcat</strong>(7)
<p>
<h2>BUGS</h2>
    None Reported.
<p>

<h2>DISTRIBUTION FILES</h2>
    <ul>
    <li> <em>bobcat_2.20.01-x.dsc</em>: detached signature;
    <li> <em>bobcat_2.20.01-x.tar.gz</em>: source archive;
    <li> <em>bobcat_2.20.01-x_i386.changes</em>: change log;
    <li> <em>libbobcat1_2.20.01-x_*.deb</em>: debian package holding the
            libraries;
    <li> <em>libbobcat1-dev_2.20.01-x_*.deb</em>: debian package holding the
            libraries, headers and manual pages;
    <li> <em>http://sourceforge.net/projects/bobcat</em>: public archive location;
    </ul>
<p>
<h2>BOBCAT</h2>
    Bobcat is an acronym of `Brokken's Own Base Classes And Templates'.
<p>
<h2>COPYRIGHT</h2>
    This is free software, distributed under the terms of the 
    GNU General Public License (GPL).
<p>
<h2>AUTHOR</h2>
    Frank B. Brokken (<strong>f.b.brokken@rug.nl</strong>).
<p>

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