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authortoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
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+<HTML>
+<HEAD>
+ <TITLE> DwMediaType Man Page </TITLE>
+</HEAD>
+<BODY BGCOLOR="#FFFFFF">
+<H2>
+ <FONT COLOR="navy"> NAME </FONT>
+</H2>
+<P>
+DwMediaType -- Class representing a MIME media-type
+<H2>
+ <FONT COLOR="navy"> SYNOPSIS </FONT>
+</H2>
+<PRE>class DW_EXPORT DwMediaType : public <A HREF="fieldbdy.html">DwFieldBody</A> {
+
+public:
+
+ <A HREF="mediatyp.html#DwMediaType">DwMediaType</A>();
+ <A HREF="mediatyp.html#DwMediaType">DwMediaType</A>(const DwMediaType&amp; aMediaType);
+ <A HREF="mediatyp.html#DwMediaType">DwMediaType</A>(const DwString&amp; aStr, DwMessageComponent* aParent=0);
+ virtual ~DwMediaType();
+ const DwMediaType&amp; <A HREF="mediatyp.html#op_eq">operator =</A> (const DwMediaType&amp; aMediaType);
+ virtual void <A HREF="mediatyp.html#Parse">Parse</A>();
+ virtual void <A HREF="mediatyp.html#Assemble">Assemble</A>();
+ virtual DwMessageComponent* <A HREF="mediatyp.html#Clone">Clone</A>() const;
+ int <A HREF="mediatyp.html#Type">Type</A>() const;
+ void <A HREF="mediatyp.html#SetType">SetType</A>(int aType);
+ const DwString&amp; <A HREF="mediatyp.html#TypeStr">TypeStr</A>() const;
+ void <A HREF="mediatyp.html#SetTypeStr">SetTypeStr</A>(const DwString&amp; aStr);
+ int <A HREF="mediatyp.html#Subtype">Subtype</A>() const;
+ void <A HREF="mediatyp.html#SetSubtype">SetSubtype</A>(int aSubtype);
+ const DwString&amp; <A HREF="mediatyp.html#SubtypeStr">SubtypeStr</A>() const;
+ void <A HREF="mediatyp.html#SetSubtypeStr">SetSubtypeStr</A>(const DwString&amp; aStr);
+ const DwString&amp; <A HREF="mediatyp.html#Boundary">Boundary</A>() const;
+ void <A HREF="mediatyp.html#SetBoundary">SetBoundary</A>(const DwString&amp; aStr);
+ virtual void <A HREF="mediatyp.html#CreateBoundary">CreateBoundary</A>(unsigned aLevel=0);
+ const DwString&amp; <A HREF="mediatyp.html#Name">Name</A>() const;
+ void <A HREF="mediatyp.html#SetName">SetName</A>(const DwString&amp; aStr);
+ DwParameter* <A HREF="mediatyp.html#FirstParameter">FirstParameter</A>() const;
+ void <A HREF="mediatyp.html#AddParameter">AddParameter</A>(DwParameter* aParam);
+ static DwMediaType* <A HREF="mediatyp.html#NewMediaType">NewMediaType</A>(const DwString&amp; aStr,
+ DwMessageComponent* aParent);
+ static DwMediaType* (*<A HREF="mediatyp.html#sNewMediaType">sNewMediaType</A>)(const DwString&amp;,
+ DwMessageComponent*);
+
+protected:
+
+ void _AddParameter(DwParameter* aParam);
+ virtual void TypeEnumToStr();
+ virtual void TypeStrToEnum();
+ virtual void SubtypeEnumToStr();
+ virtual void SubtypeStrToEnum();
+ void DeleteParameterList();
+ void CopyParameterList(DwParameter* aFirst);
+ int mType;
+ int mSubtype;
+ DwString mTypeStr;
+ DwString mSubtypeStr;
+ DwString mBoundaryStr;
+ DwString <A HREF="mediatyp.html#mNameStr">mNameStr</A>;
+ DwParameter* mFirstParameter;
+
+public:
+
+ virtual void <A HREF="mediatyp.html#PrintDebugInfo">PrintDebugInfo</A>(ostream&amp; aStrm, int aDepth=0) const;
+ virtual void <A HREF="mediatyp.html#CheckInvariants">CheckInvariants</A>() const;
+
+protected:
+
+ void _PrintDebugInfo(ostream&amp; aStrm) const;
+};
+</PRE>
+<H2>
+ <FONT COLOR="navy"> DESCRIPTION </FONT>
+</H2>
+<P>
+<B><TT>DwMediaType</TT></B> represents a field body for the Content-Type
+header field as described in RFC-2045. This field body specifies the kind
+of data contained in the body of a message or a body part. A media type is
+described by two keywords: a primary type (or just <I>type</I>) and a
+<I>subtype</I>. RFC-2046 specifies the seven primary types text, multipart,
+message, image, audio, video, and application. RFC-2077 adds the new primary
+type model.
+<P>
+<B><TT>DwMediaType</TT></B> has member functions that allow you to set or
+get the type and subtype as either enumerated values or as strings. It also
+contains a list of
+<B><TT><A HREF="param.html">DwParameter</A></TT></B> objects that represent
+the parameters of the field body. You can use convenience functions to directly
+access the boundary parameter of a multipart media type, or to access the
+name parameter that is often used with several media types, such as
+application/octet-stream.
+<P>
+Some MIME parsers have problems with folded header fields, and this especially
+seems to be a problem with the Content-Type field. To disable folding when
+the <B><TT>DwMediaType</TT></B> object is assembled, call the inherited member
+function <B><TT>DwFieldBody::SetFolding()</TT></B> with an argument of
+<B><TT>DwFalse</TT></B>.
+<H2>
+ <FONT COLOR="navy"> Public Member Functions </FONT>
+</H2>
+<P>
+<FONT COLOR="teal"><B> <A NAME="DwMediaType">DwMediaType</A>() <BR>
+DwMediaType(const DwMediaType&amp; aMediaType) <BR>
+DwMediaType(const DwString&amp; aStr, DwMessageComponent* aParent=0)
+</B></FONT>
+<P>
+The first constructor is the default constructor, which sets the
+<B><TT>DwMediaType</TT></B> object's string representation to the empty string
+and sets its parent to <B><TT>NULL</TT></B>.
+<P>
+The second constructor is the copy constructor, which performs deep copy
+of <B><TT>aMediaType</TT></B>. The parent of the new
+<B><TT>DwMediaType</TT></B> object is set to <B><TT>NULL</TT></B>.
+<P>
+The third constructor copies <B><TT>aStr</TT></B> to the
+<B><TT>DwMediaType</TT></B> object's string representation and sets
+<B><TT>aParent</TT></B> as its parent. The virtual member function
+<B><TT>Parse()</TT></B> should be called immediately after this constructor
+in order to parse the string representation. Unless it is
+<B><TT>NULL</TT></B>, <B><TT>aParent</TT></B> should point to an object of
+a class derived from <B><TT>DwField</TT></B>.
+<P>
+<FONT COLOR="teal"><B> const DwMediaType&amp; <A NAME="op_eq">operator =</A>
+(const DwMediaType&amp; aMediaType) </B></FONT>
+<P>
+This is the assignment operator, which performs a deep copy of
+<B><TT>aMediaType</TT></B>. The parent node of the
+<B><TT>DwMediaType</TT></B> object is not changed.
+<P>
+<FONT COLOR="teal"><B> virtual void <A NAME="Parse">Parse</A>() </B></FONT>
+<P>
+This virtual function, inherited from <B><TT>DwMessageComponent</TT></B>,
+executes the parse method for <B><TT>DwMediaType</TT></B> objects. It should
+be called immediately after the string representation is modified and before
+the parts of the broken-down representation are accessed.
+<P>
+This function clears the is-modified flag.
+<P>
+<FONT COLOR="teal"><B> virtual void <A NAME="Assemble">Assemble</A>()
+</B></FONT>
+<P>
+This virtual function, inherited from <B><TT>DwMessageComponent</TT></B>,
+executes the assemble method for <B><TT>DwMediaType</TT></B> objects. It
+should be called whenever one of the object's attributes is changed in order
+to assemble the string representation from its broken-down representation.
+It will be called automatically for this object by the parent object's
+<B><TT>Assemble()</TT></B> member function if the is-modified flag is set.
+<P>
+This function clears the is-modified flag.
+<P>
+<FONT COLOR="teal"><B> virtual DwMessageComponent*
+<A NAME="Clone">Clone</A>() const </B></FONT>
+<P>
+This virtual function, inherited from <B><TT>DwMessageComponent</TT></B>,
+creates a new <B><TT>DwMediaType</TT></B> object on the free store that has
+the same value as this <B><TT>DwMediaType</TT></B> object. The basic idea
+is that of a virtual copy constructor.
+<P>
+<FONT COLOR="teal"><B> int <A NAME="Type">Type</A>() const </B></FONT>
+<P>
+Returns the primary type as an enumerated value. Enumerated values are defined
+for all standard types in the file enum.h. If the type is non-standard,
+<B><TT>DwMime::kTypeUnknown</TT></B> is returned. The member function
+<B><TT>TypeStr()</TT></B> may be used to get the value of any type, standard
+or non-standard, as a string.
+<P>
+<FONT COLOR="teal"><B> void <A NAME="SetType">SetType</A>(int aType)
+</B></FONT>
+<P>
+Sets the primary type from the enumerated value <B><TT>aType</TT></B>. Enumerated
+values are defined for all standard types in the file enum.h. The member
+function <B><TT>SetTypeStr()</TT></B> may be used to set the value of any
+type, standard or non-standard, from a string.
+<P>
+<FONT COLOR="teal"><B> const DwString&amp; <A NAME="TypeStr">TypeStr</A>()
+const </B></FONT>
+<P>
+Returns the primary type as a string.
+<P>
+<FONT COLOR="teal"><B> void <A NAME="SetTypeStr">SetTypeStr</A>(const
+DwString&amp; aStr) </B></FONT>
+<P>
+Sets the primary type from a string.
+<P>
+<FONT COLOR="teal"><B> int <A NAME="Subtype">Subtype</A>() const </B></FONT>
+<P>
+Returns the subtype as an enumerated value. Enumerated values are defined
+for all standard subtypes in the file enum.h. If the subtype is non-standard,
+<B><TT>DwMime::kSubtypeUnknown</TT></B> is returned. The member function
+<B><TT>SubtypeStr()</TT></B> may be used to get the value of any subtype,
+standard or non-standard, as a string.
+<P>
+<FONT COLOR="teal"><B> void <A NAME="SetSubtype">SetSubtype</A>(int aSubtype)
+</B></FONT>
+<P>
+Sets the subtype from the enumerated value <B><TT>aSubtype</TT></B>. Enumerated
+values are defined for all standard subtypes in the file enum.h. The member
+function <B><TT>SetSubtypeStr()</TT></B> may be used to set the value of
+any subtype, standard or non-standard, from a string.
+<P>
+<FONT COLOR="teal"><B> const DwString&amp;
+<A NAME="SubtypeStr">SubtypeStr</A>() const </B></FONT>
+<P>
+Returns the subtype as a string.
+<P>
+<FONT COLOR="teal"><B> void <A NAME="SetSubtypeStr">SetSubtypeStr</A>(const
+DwString&amp; aStr) </B></FONT>
+<P>
+Sets the subtype from a string.
+<P>
+<FONT COLOR="teal"><B> const DwString&amp; <A NAME="Boundary">Boundary</A>()
+const </B></FONT>
+<P>
+For the multipart type only, returns the value of the boundary parameter.
+This member function is a convenience function that searches the list of
+<B><TT>DwParameter</TT></B> objects.
+<P>
+<FONT COLOR="teal"><B> void <A NAME="SetBoundary">SetBoundary</A>(const
+DwString&amp; aStr) </B></FONT>
+<P>
+For the multipart type only, sets the value of the boundary parameter. This
+member function is a convenience function that accesses the list of
+<B><TT>DwParameter</TT></B> objects.
+<P>
+<FONT COLOR="teal"><B> virtual void
+<A NAME="CreateBoundary">CreateBoundary</A>(unsigned aLevel=0) </B></FONT>
+<P>
+For the multipart type only, creates a boundary string.
+<B><TT>aLevel</TT></B> indicates the level of a nested multipart body part;
+if it is positive, it is used to form part of the created boundary string.
+This member function is a convenience function that accesses the list of
+child <B><TT>DwParameter</TT></B> objects.
+<P>
+<FONT COLOR="teal"><B> const DwString&amp; <A NAME="Name">Name</A>() const
+</B></FONT>
+<P>
+Returns the value of the "name" parameter, if such a parameter is present.
+The name parameter is often found in several media types, including the
+application/octet-stream media type; it suggests a file name for saving to
+a disk file. (The filename parameter in the Content-Disposition header field
+is an alternative way to indicate a file name.) This member function is a
+convenience function that searches the list of
+<B><TT>DwParameter</TT></B> objects.
+<P>
+<FONT COLOR="teal"><B> void <A NAME="SetName">SetName</A>(const DwString&amp;
+aStr) </B></FONT>
+<P>
+Sets the value of the "name" parameter. If a name parameter is not already
+present, it is added. The name parameter is often found in several media
+types, including the application/octet-stream media type; it suggests a file
+name for saving to a disk file. (The filename parameter in the
+Content-Disposition header field is an alternative way to indicate a file
+name.) This member function is a convenience function that accesses the list
+of <B><TT>DwParameter</TT></B> objects.
+<P>
+<FONT COLOR="teal"><B> DwParameter*
+<A NAME="FirstParameter">FirstParameter</A>() const </B></FONT>
+<P>
+Returns the first <B><TT>DwParameter</TT></B> object in the list managed
+by this <B><TT>DwMediaType</TT></B> object. Use
+<B><TT>DwParameter::Next()</TT></B> to iterate through the list.
+<P>
+<FONT COLOR="teal"><B> void
+<A NAME="AddParameter">AddParameter</A>(DwParameter* aParam) </B></FONT>
+<P>
+Adds a <B><TT>DwParameter</TT></B> object to the list managed by this
+<B><TT>DwMediaType</TT></B> object.
+<P>
+<FONT COLOR="teal"><B> static DwMediaType*
+<A NAME="NewMediaType">NewMediaType</A>(const DwString&amp; aStr,
+DwMessageComponent* aParent) </B></FONT>
+<P>
+Creates a new <B><TT>DwMediaType</TT></B> object on the free store. If the
+static data member <B><TT>sNewMediaType</TT></B> is <B><TT>NULL</TT></B>,
+this member function will create a new <B><TT>DwMediaType</TT></B> and return
+it. Otherwise, <B><TT>NewMediaType()</TT></B> will call the user-supplied
+function pointed to by <B><TT>sNewMediaType</TT></B>, which is assumed to
+return an object from a class derived from <B><TT>DwMediaType</TT></B>, and
+return that object.
+<P>
+<FONT COLOR="teal"><B> virtual void
+<A NAME="PrintDebugInfo">PrintDebugInfo</A>(ostream&amp; aStrm, int aDepth=0)
+const </B></FONT>
+<P>
+This virtual function, inherited from <B><TT>DwMessageComponent</TT></B>,
+prints debugging information about this object to <B><TT>aStrm</TT></B>.
+It will also call <B><TT>PrintDebugInfo()</TT></B> for any of its child
+components down to a level of <B><TT>aDepth</TT></B>.
+<P>
+This member function is available only in the debug version of the library.
+<P>
+<FONT COLOR="teal"><B> virtual void
+<A NAME="CheckInvariants">CheckInvariants</A>() const </B></FONT>
+<P>
+Aborts if one of the invariants of the object fails. Use this member function
+to track down bugs.
+<P>
+This member function is available only in the debug version of the library.
+<H2>
+ <FONT COLOR="navy"> Public Data Members </FONT>
+</H2>
+<P>
+<FONT COLOR="teal"><B> static DwMediaType*
+(*<A NAME="sNewMediaType">sNewMediaType</A>)(const DwString&amp;,
+DwMessageComponent*) </B></FONT>
+<P>
+If <B><TT>sNewMediaType</TT></B> is not <B><TT>NULL</TT></B>, it is assumed
+to point to a user-supplied function that returns an object from a class
+derived from <B><TT>DwMediaType</TT></B>.
+</BODY></HTML>