329 lines
11 KiB
Rust
329 lines
11 KiB
Rust
/*
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* meli - attachments module
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*
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* Copyright 2017 Manos Pitsidianakis
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*
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* This file is part of meli.
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*
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* meli is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* meli is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with meli. If not, see <http://www.gnu.org/licenses/>.
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*/
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use mailbox::email::parser;
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use std::fmt::{Display, Formatter, Result};
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/*
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*
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* Data
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* Text { content: String }
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* Multipart
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*/
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#[derive(Clone,Debug, PartialEq)]
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pub enum MultipartType {
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Mixed,
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Alternative,
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Digest,
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Unsupported { tag: String },
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}
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#[derive(Clone,Debug)]
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pub enum AttachmentType {
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Data { tag: String },
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Text { content: String },
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Multipart { of_type: MultipartType, subattachments: Vec<Attachment>, }
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}
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#[derive(Clone,Debug)]
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pub enum ContentType {
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Text,
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Multipart { boundary: String },
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Unsupported { tag: String },
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}
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impl Display for ContentType {
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fn fmt(&self, f: &mut Formatter) -> Result {
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match *self {
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ContentType::Text => {
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write!(f, "text")
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},
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ContentType::Multipart { .. } => {
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write!(f, "multipart")
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},
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ContentType::Unsupported { tag: ref t } => {
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write!(f, "{}", t)
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},
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}
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}
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}
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#[derive(Clone,Debug, PartialEq)]
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pub enum ContentSubType {
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Plain,
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Other { tag: String },
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}
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impl Display for ContentSubType {
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fn fmt(&self, f: &mut Formatter) -> Result {
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match *self {
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ContentSubType::Plain => {
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write!(f, "plain")
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},
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ContentSubType::Other { tag: ref t } => {
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write!(f, "{}", t)
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},
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}
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}
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}
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#[derive(Clone,Debug)]
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pub enum ContentTransferEncoding {
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_8Bit,
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_7Bit,
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Base64,
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QuotedPrintable,
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Other { tag: String },
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}
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pub struct AttachmentBuilder {
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content_type: (ContentType, ContentSubType),
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content_transfer_encoding: ContentTransferEncoding,
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raw: Vec<u8>,
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}
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impl AttachmentBuilder {
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pub fn new(content: &[u8]) -> Self {
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AttachmentBuilder {
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content_type: (ContentType::Text, ContentSubType::Plain),
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content_transfer_encoding: ContentTransferEncoding::_7Bit,
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raw: content.to_vec(),
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}
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}
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pub fn content_type(&mut self, value: &str) -> &Self {
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match parser::content_type(value.as_bytes()).to_full_result() {
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Ok((ct, cst, params)) => {
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match ct.to_lowercase().as_ref() {
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"multipart" => {
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let mut boundary = None;
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for (n, v) in params {
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if n.to_lowercase() == "boundary" {
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boundary = Some(format!("--{}--", v).to_string());
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break;
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}
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}
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assert!(boundary.is_some());
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self.content_type.0 = ContentType::Multipart { boundary: boundary.unwrap() };
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self.content_type.1 = ContentSubType::Other { tag: cst.to_string() };
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},
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"text" => {
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self.content_type.0 = ContentType::Text;
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let cst = cst.to_lowercase();
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match cst.as_ref() {
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"plain" => {},
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_ => {
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self.content_type.1 = ContentSubType::Other { tag: cst };
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},
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}
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},
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unsupported_type => {
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self.content_type.0 = ContentType::Unsupported { tag: unsupported_type.to_string() };
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self.content_type.1 = ContentSubType::Other { tag: cst.to_string() };
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},
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}
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},
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Err(v) => {
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eprintln!("parsing error in content_type: {:?} {:?}", value, v);
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}
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}
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self
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}
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pub fn content_transfer_encoding(&mut self, value: &str) -> &Self {
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self.content_transfer_encoding =
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match value.to_lowercase().as_ref() {
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"base64" => {
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ContentTransferEncoding::Base64
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},
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"7bit" => {
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ContentTransferEncoding::_7Bit
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},
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"8bit" => {
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ContentTransferEncoding::_8Bit
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},
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"quoted-printable" => {
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ContentTransferEncoding::QuotedPrintable
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},
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k => {
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ContentTransferEncoding::Other { tag: k.to_string() }
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},
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};
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self
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}
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fn decode(&self) -> String {
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match self.content_transfer_encoding {
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ContentTransferEncoding::Base64 => {
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match ::base64::decode(&::std::str::from_utf8(&self.raw).unwrap().trim().lines().fold(String::with_capacity(self.raw.len()), |mut acc, x| { acc.push_str(x); acc })) {
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Ok( ref v ) => {
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String::from_utf8_lossy(v).into_owned()
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},
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_ => {
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String::from_utf8_lossy(&self.raw).into_owned()
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}
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}
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},
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ContentTransferEncoding::QuotedPrintable => {
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parser::quoted_printable_text(&self.raw).to_full_result().unwrap()
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},
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ContentTransferEncoding::_7Bit | ContentTransferEncoding::_8Bit | ContentTransferEncoding::Other { .. } => {
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String::from_utf8_lossy(&self.raw).into_owned()
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}
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}
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}
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pub fn build(self) -> Attachment {
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let attachment_type =
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match self.content_type.0 {
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ContentType::Text => {
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AttachmentType::Text { content: self.decode() }
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},
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ContentType::Multipart { boundary: ref b } => {
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let multipart_type =
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match self.content_type.1 {
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ContentSubType::Other { ref tag } => {
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match tag.to_lowercase().as_ref() {
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"mixed" => {
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MultipartType::Mixed
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},
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"alternative" => {
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MultipartType::Alternative
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},
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"digest" => {
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MultipartType::Digest
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},
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t => {
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MultipartType::Unsupported { tag: t.to_string() }
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},
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}
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},
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_ => {
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panic!()
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}
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};
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AttachmentType::Multipart {
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of_type: multipart_type,
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subattachments: Attachment::subattachments(&self.raw, b),
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}
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},
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ContentType::Unsupported { ref tag } => {
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AttachmentType::Data { tag: tag.clone() }
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},
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};
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Attachment {
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content_type: self.content_type,
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content_transfer_encoding: self.content_transfer_encoding,
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raw: self.raw,
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attachment_type: attachment_type,
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}
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}
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}
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#[derive(Clone,Debug)]
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pub struct Attachment {
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content_type: (ContentType, ContentSubType),
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content_transfer_encoding: ContentTransferEncoding,
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raw: Vec<u8>,
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attachment_type: AttachmentType,
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}
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impl Attachment {
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fn get_text_recursive(&self, text: &mut String) {
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match self.attachment_type {
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AttachmentType::Data { .. } => {
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text.push_str(&format!("Data attachment of type {}", self.get_tag()));
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},
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AttachmentType::Text { content: ref t } => {
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text.push_str(t);
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},
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AttachmentType::Multipart {
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of_type: ref multipart_type,
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subattachments: ref sub_att_vec,
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} => {
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if *multipart_type == MultipartType::Alternative {
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for a in sub_att_vec {
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if a.content_type.1 == ContentSubType::Plain {
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a.get_text_recursive(text);
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break;
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}
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}
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} else {
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for a in sub_att_vec {
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a.get_text_recursive(text);
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text.push_str("\n\n");
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}
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}
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},
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}
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}
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pub fn get_text(&self) -> String {
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let mut text = String::with_capacity(self.raw.len());
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self.get_text_recursive(&mut text);
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text
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}
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pub fn get_description(&self) -> String {
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unimplemented!()
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}
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pub fn get_tag(&self) -> String {
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format!("{}/{}", self.content_type.0, self.content_type.1).to_string()
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}
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pub fn subattachments(raw: &[u8], boundary: &str) -> Vec<Attachment> {
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let boundary_length = boundary.len();
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match parser::attachments(raw, &boundary[0..boundary_length - 2], boundary).to_full_result() {
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Ok(attachments) => {
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let mut vec = Vec::with_capacity(attachments.len());
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for a in attachments {
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let (headers, body) = match parser::attachment(a).to_full_result() {
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Ok(v) => v,
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Err(_) => {
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eprintln!("error in parsing attachment");
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eprintln!("\n-------------------------------");
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eprintln!("{}\n", ::std::string::String::from_utf8_lossy(a));
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eprintln!("-------------------------------\n");
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continue
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}
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};
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let mut builder = AttachmentBuilder::new(body);
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for (name, value) in headers {
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match name.to_lowercase().as_ref(){
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"content-type" => {
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builder.content_type(value);
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},
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"content-transfer-encoding" => {
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builder.content_transfer_encoding(value);
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},
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_ => {
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},
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}
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}
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vec.push(builder.build());
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}
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vec
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},
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a => {
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eprintln!("error in 469 {:?}\n\traw: {:?}\n\tboundary: {:?}", a, ::std::str::from_utf8(raw).unwrap(), boundary);
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Vec::new()
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},
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}
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}
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}
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