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75 lines
3.1 KiB
TeX
75 lines
3.1 KiB
TeX
\section{\module{MimeWriter} ---
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Generic MIME file writer}
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\declaremodule{standard}{MimeWriter}
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\modulesynopsis{Generic MIME file writer.}
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\sectionauthor{Christopher G. Petrilli}{petrilli@amber.org}
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This module defines the class \class{MimeWriter}. The
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\class{MimeWriter} class implements a basic formatter for creating
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MIME multi-part files. It doesn't seek around the output file nor
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does it use large amounts of buffer space. You must write the parts
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out in the order that they should occur in the final
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file. \class{MimeWriter} does buffer the headers you add, allowing you
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to rearrange their order.
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\begin{classdesc}{MimeWriter}{fp}
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Return a new instance of the \class{MimeWriter} class. The only
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argument passed, \var{fp}, is a file object to be used for
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writing. Note that a \class{StringIO} object could also be used.
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\end{classdesc}
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\subsection{MimeWriter Objects \label{MimeWriter-objects}}
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\class{MimeWriter} instances have the following methods:
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\begin{methoddesc}{addheader}{key, value\optional{, prefix}}
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Add a header line to the MIME message. The \var{key} is the name of
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the header, where the \var{value} obviously provides the value of the
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header. The optional argument \var{prefix} determines where the header
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is inserted; \samp{0} means append at the end, \samp{1} is insert at
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the start. The default is to append.
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\end{methoddesc}
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\begin{methoddesc}{flushheaders}{}
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Causes all headers accumulated so far to be written out (and
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forgotten). This is useful if you don't need a body part at all,
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e.g.\ for a subpart of type \mimetype{message/rfc822} that's (mis)used
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to store some header-like information.
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\end{methoddesc}
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\begin{methoddesc}{startbody}{ctype\optional{, plist\optional{, prefix}}}
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Returns a file-like object which can be used to write to the
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body of the message. The content-type is set to the provided
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\var{ctype}, and the optional parameter \var{plist} provides
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additional parameters for the content-type declaration. \var{prefix}
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functions as in \method{addheader()} except that the default is to
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insert at the start.
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\end{methoddesc}
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\begin{methoddesc}{startmultipartbody}{subtype\optional{,
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boundary\optional{, plist\optional{, prefix}}}}
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Returns a file-like object which can be used to write to the
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body of the message. Additionally, this method initializes the
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multi-part code, where \var{subtype} provides the multipart subtype,
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\var{boundary} may provide a user-defined boundary specification, and
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\var{plist} provides optional parameters for the subtype.
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\var{prefix} functions as in \method{startbody()}. Subparts should be
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created using \method{nextpart()}.
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\end{methoddesc}
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\begin{methoddesc}{nextpart}{}
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Returns a new instance of \class{MimeWriter} which represents an
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individual part in a multipart message. This may be used to write the
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part as well as used for creating recursively complex multipart
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messages. The message must first be initialized with
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\method{startmultipartbody()} before using \method{nextpart()}.
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\end{methoddesc}
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\begin{methoddesc}{lastpart}{}
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This is used to designate the last part of a multipart message, and
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should \emph{always} be used when writing multipart messages.
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\end{methoddesc}
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