class Net::IMAP::FetchStruct

Each key specifies a message attribute, and the value is the corresponding data item. Standard data items have corresponding accessor methods. The definitions of each attribute type is documented on its accessor.

A transformation of attr, with all the keys converted to upper case.

Header field names are case-preserved but not case-sensitive, so this is used by header_fields and header_fields_not.

Returns the binary representation of a particular MIME part, which has already been decoded according to its Content-Transfer-Encoding.

See part for a description of part_nums and offset.

This is the same as getting the value of "BINARY[#{part_nums.join(".")}]" or "BINARY[#{part_nums.join(".")}]<#{offset}>" from attr.

The server must support either IMAP4rev2 or the BINARY extension [RFC3516].

See also: binary_size, mime

Returns the decoded size of a particular MIME part (the size to expect in response to a BINARY fetch request).

See part for a description of part_nums.

This is the same as getting the value of "BINARY.SIZE[#{part_nums.join(".")}]" from attr.

The server must support either IMAP4rev2 or the BINARY extension [RFC3516].

See also: binary, mime

Returns an alternate form of bodystructure, without any extension data.

This is the same as getting the value for "BODY" from attr.

NOTE:

Use message, part, header, header_fields, header_fields_not, text, or mime to retrieve BODY[#{section_spec}] attributes.

A BodyStructure object that describes the message, if it was fetched.

This is the same as getting the value for "BODYSTRUCTURE" from attr.

An ObjectID that uniquely identifies the immutable content of a single message.

The server must return the same EMAILID for both the source and destination messages after a COPY or MOVE command. However, it is possible for different messages with the same EMAILID to have different mutable attributes, such as flags.

This is the same as getting the value for "EMAILID" from attr.

The server must support the OBJECTID extension [RFC8474].

An Envelope object that describes the envelope structure of a message. See the documentation for Envelope for a description of the envelope structure attributes.

This is the same as getting the value for "ENVELOPE" from attr.

A array of flags that are set for this message. System flags are symbols that have been capitalized by String#capitalize. Keyword flags are strings and their case is not changed.

This is the same as getting the value for "FLAGS" from attr.

NOTE:

The FLAGS field is dynamic, and can change for a uniquely identified message.

The [RFC5322] header of a message or of an encapsulated [MIME-IMT] MESSAGE/RFC822 or MESSAGE/GLOBAL message.

Headers can be parsed using the “mail” gem.

See part for a description of part_nums and offset.

Without fields or except

This is the same as getting the value from attr for one of:

• BODY[HEADER]

• BODY[HEADER]<#{offset}>

• BODY[#{part_nums.join "."}.HEADER]"

• BODY[#{part_nums.join "."}.HEADER]<#{offset}>"

With fields

When fields is sent, returns a subset of the header which contains only the header fields that match one of the names in the list.

This is the same as getting the value from attr_upcase for one of:

• BODY[HEADER.FIELDS (#{names.join " "})]

• BODY[HEADER.FIELDS (#{names.join " "})]<#{offset}>

• BODY[#{part_nums.join "."}.HEADER.FIELDS (#{names.join " "})]

• BODY[#{part_nums.join "."}.HEADER.FIELDS (#{names.join " "})]<#{offset}>

See also: header_fields

With except

When except is sent, returns a subset of the header which contains only the header fields that do not match one of the names in the list.

This is the same as getting the value from attr_upcase for one of:

• BODY[HEADER.FIELDS.NOT (#{names.join " "})]

• BODY[HEADER.FIELDS.NOT (#{names.join " "})]<#{offset}>

• BODY[#{part_nums.join "."}.HEADER.FIELDS.NOT (#{names.join " "})]

• BODY[#{part_nums.join "."}.HEADER.FIELDS.NOT (#{names.join " "})]<#{offset}>

See also: header_fields_not

The result from header when called with fields: names.

The result from header when called with except: names.

The internal date and time of the message on the server. This is not the date and time in the [RFC5322] header, but rather a date and time which reflects when the message was received.

This is similar to getting the value for "INTERNALDATE" from attr.

NOTE:

attr["INTERNALDATE"] returns a string, and this method returns a Time object.

The RFC5322 expression of the entire message, as a string.

See part for a description of offset.

RFC5322 messages can be parsed using the “mail” gem.

This is the same as getting the value for "BODY[]" or "BODY[]<#{offset}>" from attr.

See also: header, text, and mime.

The [MIME-IMB] header for a message part, if it was fetched.

See part for a description of part_nums and offset.

This is the same as getting the value for "BODY[#{part_nums}.MIME]" or "BODY[#{part_nums}.MIME]<#{offset}>" from attr.

See also: message, header, and text.

The modification sequence number associated with this IMAP message.

This is the same as getting the value for "MODSEQ" from attr.

The server must support the CONDSTORE extension [RFC7162].

NOTE:

The MODSEQ field is dynamic, and can change for a uniquely identified message.

The string representation of a particular MIME part.

part_nums forms a path of MIME part numbers, counting up from 1, which may specify an arbitrarily nested part, similarly to Array#dig. Messages that don’t use MIME, or MIME messages that are not multipart and don’t hold an encapsulated message, only have part 1.

If a zero-based offset is given, the returned string is a substring of the entire contents, starting at that origin octet. This means that BODY[]<0> MAY be truncated, but BODY[] is never truncated.

This is the same as getting the value of "BODY[#{part_nums.join(".")}]" or "BODY[#{part_nums.join(".")}]<#{offset}>" from attr.

See also: message, header, text, and mime.

Semantically equivalent to message with no arguments.

This is the same as getting the value for "RFC822" from attr.

NOTE:

IMAP4rev2 deprecates RFC822.

Semantically equivalent to header, with no arguments.

This is the same as getting the value for "RFC822.HEADER" from attr.

NOTE:

IMAP4rev2 deprecates RFC822.HEADER.

A number expressing the [RFC5322] size of the message.

This is the same as getting the value for "RFC822.SIZE" from attr.

NOTE:

IMAP was originally developed for the older RFC822 standard, and as a consequence several fetch items in IMAP incorporate “RFC822” in their name. With the exception of RFC822.SIZE, there are more modern replacements; for example, the modern version of RFC822.HEADER is BODY.PEEK[HEADER]. In all cases, “RFC822” should be interpreted as a reference to the updated RFC5322 standard.

Semantically equivalent to text, with no arguments.

This is the same as getting the value for "RFC822.TEXT" from attr.

NOTE:

IMAP4rev2 deprecates RFC822.TEXT.

Alias for: rfc822_size

The text body of a message or a message part, if it was fetched, omitting the [RFC5322] header.

See part for a description of part_nums and offset.

This is the same as getting the value from attr for one of:

• "BODY[TEXT]",

• "BODY[TEXT]<#{offset}>",

• "BODY[#{section}.TEXT]", or

• "BODY[#{section}.TEXT]<#{offset}>".

See also: message, header, and mime.

An ObjectID that uniquely identifies a set of messages that the server believes should be grouped together.

It is generally based on some combination of References, In-Reply-To, and Subject, but the exact implementation is left up to the server implementation. The server should return the same thread identifier for related messages, even if they are in different mailboxes.

This is the same as getting the value for "THREADID" from attr.

The server must support the OBJECTID extension [RFC8474].

A number expressing the unique identifier of the message.

This is the same as getting the value for "UID" from attr.

NOTE:

For UIDFetchData, this returns the uniqueid at the beginning of the UIDFETCH response, not the value from attr.