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