489 lines
16 KiB
Rust
489 lines
16 KiB
Rust
/*
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* meli - melib crate.
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*
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* Copyright 2017-2020 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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/*! Compose a `Draft`, with MIME and attachment support */
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use super::*;
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use crate::email::attachment_types::{
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Charset, ContentTransferEncoding, ContentType, MultipartType,
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};
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use crate::email::attachments::{decode, decode_rec, AttachmentBuilder};
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use crate::shellexpand::ShellExpandTrait;
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use data_encoding::BASE64_MIME;
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use std::ffi::OsStr;
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use std::io::Read;
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use std::path::{Path, PathBuf};
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use std::str;
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use xdg_utils::query_mime_info;
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pub mod mime;
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pub mod random;
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//use self::mime::*;
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use super::parser;
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#[derive(Debug, PartialEq, Eq, Clone)]
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pub struct Draft {
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pub headers: HeaderMap,
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pub body: String,
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pub attachments: Vec<AttachmentBuilder>,
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}
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impl Default for Draft {
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fn default() -> Self {
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let mut headers = HeaderMap::default();
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headers.insert(
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HeaderName::new_unchecked("Date"),
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crate::datetime::timestamp_to_string(
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crate::datetime::now(),
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Some(crate::datetime::RFC822_DATE),
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true,
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),
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);
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headers.insert(HeaderName::new_unchecked("From"), "".into());
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headers.insert(HeaderName::new_unchecked("To"), "".into());
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headers.insert(HeaderName::new_unchecked("Cc"), "".into());
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headers.insert(HeaderName::new_unchecked("Bcc"), "".into());
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headers.insert(HeaderName::new_unchecked("Subject"), "".into());
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Draft {
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headers,
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body: String::new(),
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attachments: Vec::new(),
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}
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}
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}
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impl str::FromStr for Draft {
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type Err = MeliError;
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fn from_str(s: &str) -> Result<Self> {
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if s.is_empty() {
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return Err(MeliError::new("Empty input in Draft::from_str"));
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}
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let (headers, _) = parser::mail(s.as_bytes())?;
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let mut ret = Draft::default();
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for (k, v) in headers {
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ret.headers
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.insert(k.try_into()?, String::from_utf8(v.to_vec())?);
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}
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let body = Envelope::new(0).body_bytes(s.as_bytes());
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ret.body = String::from_utf8(decode(&body, None))?;
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Ok(ret)
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}
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}
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impl Draft {
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pub fn edit(envelope: &Envelope, bytes: &[u8]) -> Result<Self> {
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let mut ret = Draft::default();
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for (k, v) in envelope.headers(&bytes).unwrap_or_else(|_| Vec::new()) {
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ret.headers.insert(k.try_into()?, v.into());
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}
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ret.body = envelope.body_bytes(bytes).text();
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Ok(ret)
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}
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pub fn set_header(&mut self, header: &str, value: String) -> &mut Self {
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self.headers
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.insert(HeaderName::new_unchecked(header), value);
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self
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}
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pub fn new_reply(envelope: &Envelope, bytes: &[u8], reply_to_all: bool) -> Self {
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let mut ret = Draft::default();
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ret.headers_mut().insert(
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HeaderName::new_unchecked("References"),
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format!(
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"{} {}",
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envelope
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.references()
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.iter()
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.fold(String::new(), |mut acc, x| {
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if !acc.is_empty() {
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acc.push(' ');
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}
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acc.push_str(&x.to_string());
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acc
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}),
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envelope.message_id_display()
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),
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);
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ret.headers_mut().insert(
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HeaderName::new_unchecked("In-Reply-To"),
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envelope.message_id_display().into(),
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);
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// "Mail-Followup-To/(To+Cc+(Mail-Reply-To/Reply-To/From)) for follow-up,
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// Mail-Reply-To/Reply-To/From for reply-to-author."
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// source: https://cr.yp.to/proto/replyto.html
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if reply_to_all {
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if let Some(reply_to) = envelope.other_headers().get("Mail-Followup-To") {
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ret.headers_mut()
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.insert(HeaderName::new_unchecked("To"), reply_to.to_string());
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} else if let Some(reply_to) = envelope.other_headers().get("Reply-To") {
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ret.headers_mut()
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.insert(HeaderName::new_unchecked("To"), reply_to.to_string());
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} else {
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ret.headers_mut().insert(
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HeaderName::new_unchecked("To"),
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envelope.field_from_to_string(),
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);
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}
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// FIXME: add To/Cc
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} else if let Some(reply_to) = envelope.other_headers().get("Mail-Reply-To") {
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ret.headers_mut()
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.insert(HeaderName::new_unchecked("To"), reply_to.to_string());
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} else if let Some(reply_to) = envelope.other_headers().get("Reply-To") {
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ret.headers_mut()
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.insert(HeaderName::new_unchecked("To"), reply_to.to_string());
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} else {
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ret.headers_mut().insert(
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HeaderName::new_unchecked("To"),
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envelope.field_from_to_string(),
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);
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}
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ret.headers_mut().insert(
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HeaderName::new_unchecked("Cc"),
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envelope.field_cc_to_string(),
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);
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let body = envelope.body_bytes(bytes);
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ret.body = {
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let reply_body_bytes = decode_rec(&body, None);
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let reply_body = String::from_utf8_lossy(&reply_body_bytes);
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let lines: Vec<&str> = reply_body.lines().collect();
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let mut ret = format!(
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"On {} {} wrote:\n",
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envelope.date_as_str(),
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&ret.headers()["To"]
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);
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for l in lines {
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ret.push('>');
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ret.push_str(l);
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ret.push('\n');
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}
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ret.pop();
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ret
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};
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ret
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}
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pub fn headers_mut(&mut self) -> &mut HeaderMap {
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&mut self.headers
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}
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pub fn headers(&self) -> &HeaderMap {
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&self.headers
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}
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pub fn attachments(&self) -> &Vec<AttachmentBuilder> {
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&self.attachments
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}
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pub fn attachments_mut(&mut self) -> &mut Vec<AttachmentBuilder> {
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&mut self.attachments
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}
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pub fn body(&self) -> &str {
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&self.body
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}
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pub fn set_body(&mut self, s: String) -> &mut Self {
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self.body = s;
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self
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}
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pub fn to_string(&self) -> Result<String> {
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let mut ret = String::new();
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for (k, v) in self.headers.deref() {
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ret.push_str(&format!("{}: {}\n", k, v));
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}
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ret.push('\n');
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ret.push_str(&self.body);
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Ok(ret)
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}
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pub fn finalise(mut self) -> Result<String> {
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let mut ret = String::new();
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if self.headers.contains_key("From") && !self.headers.contains_key("Message-ID") {
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if let Ok((_, addr)) = super::parser::address::mailbox(self.headers["From"].as_bytes())
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{
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if let Some(fqdn) = addr.get_fqdn() {
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self.headers.insert(
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HeaderName::new_unchecked("Message-ID"),
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random::gen_message_id(&fqdn),
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);
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}
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}
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}
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for (k, v) in self.headers.deref() {
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if v.is_ascii() {
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ret.push_str(&format!("{}: {}\r\n", k, v));
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} else {
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ret.push_str(&format!("{}: {}\r\n", k, mime::encode_header(v)));
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}
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}
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ret.push_str("MIME-Version: 1.0\r\n");
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if self.attachments.is_empty() {
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let content_type: ContentType = Default::default();
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let content_transfer_encoding: ContentTransferEncoding = ContentTransferEncoding::_8Bit;
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ret.push_str(&format!(
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"Content-Type: {}; charset=\"utf-8\"\r\n",
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content_type
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));
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ret.push_str(&format!(
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"Content-Transfer-Encoding: {}\r\n",
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content_transfer_encoding
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));
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ret.push_str("\r\n");
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for line in self.body.lines() {
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ret.push_str(line);
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ret.push_str("\r\n");
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}
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} else if self.body.is_empty() && self.attachments.len() == 1 {
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let attachment = std::mem::replace(&mut self.attachments, Vec::new()).remove(0);
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print_attachment(&mut ret, attachment);
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} else {
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let mut parts = Vec::with_capacity(self.attachments.len() + 1);
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let attachments = std::mem::replace(&mut self.attachments, Vec::new());
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if !self.body.is_empty() {
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let mut body_attachment = AttachmentBuilder::default();
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body_attachment.set_raw(self.body.as_bytes().to_vec());
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parts.push(body_attachment);
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}
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parts.extend(attachments.into_iter());
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build_multipart(&mut ret, MultipartType::Mixed, parts);
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}
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Ok(ret)
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}
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}
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fn build_multipart(ret: &mut String, kind: MultipartType, parts: Vec<AttachmentBuilder>) {
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let boundary = ContentType::make_boundary(&parts);
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ret.push_str(&format!(
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r#"Content-Type: {}; charset="utf-8"; boundary="{}""#,
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kind, boundary
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));
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if kind == MultipartType::Encrypted {
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ret.push_str(r#"; protocol="application/pgp-encrypted""#);
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}
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ret.push_str("\r\n\r\n");
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/* rfc1341 */
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ret.push_str("This is a MIME formatted message with attachments. Use a MIME-compliant client to view it properly.\r\n");
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for sub in parts {
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ret.push_str("--");
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ret.push_str(&boundary);
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ret.push_str("\r\n");
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print_attachment(ret, sub);
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}
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ret.push_str("--");
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ret.push_str(&boundary);
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ret.push_str("--\r\n");
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}
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fn print_attachment(ret: &mut String, a: AttachmentBuilder) {
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use ContentType::*;
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match a.content_type {
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ContentType::Text {
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kind: crate::email::attachment_types::Text::Plain,
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charset: Charset::UTF8,
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parameters: ref v,
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} if v.is_empty() => {
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ret.push_str("\r\n");
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for line in String::from_utf8_lossy(a.raw()).lines() {
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ret.push_str(line);
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ret.push_str("\r\n");
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}
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}
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Text { .. } => {
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for line in a.build().into_raw().lines() {
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ret.push_str(line);
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ret.push_str("\r\n");
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}
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}
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Multipart {
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boundary: _,
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kind,
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parts,
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} => {
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build_multipart(
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ret,
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kind,
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parts
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.into_iter()
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.map(|s| s.into())
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.collect::<Vec<AttachmentBuilder>>(),
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);
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}
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MessageRfc822 => {
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ret.push_str(&format!(
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"Content-Type: {}; charset=\"utf-8\"\r\n",
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a.content_type
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));
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ret.push_str("Content-Disposition: attachment\r\n");
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ret.push_str("\r\n");
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for line in String::from_utf8_lossy(a.raw()).lines() {
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ret.push_str(line);
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ret.push_str("\r\n");
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}
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}
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PGPSignature => {
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ret.push_str(&format!(
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"Content-Type: {}; charset=\"utf-8\"; name=\"signature.asc\"\r\n",
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a.content_type
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));
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ret.push_str("Content-Description: Digital signature\r\n");
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ret.push_str("Content-Disposition: inline\r\n");
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ret.push_str("\r\n");
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for line in String::from_utf8_lossy(a.raw()).lines() {
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ret.push_str(line);
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ret.push_str("\r\n");
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}
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}
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_ => {
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let content_transfer_encoding: ContentTransferEncoding = if a.raw().is_ascii() {
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ContentTransferEncoding::_8Bit
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} else {
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ContentTransferEncoding::Base64
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};
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if let Some(name) = a.content_type().name() {
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ret.push_str(&format!(
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"Content-Type: {}; name=\"{}\"; charset=\"utf-8\"\r\n",
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a.content_type(),
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name
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));
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} else {
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ret.push_str(&format!(
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"Content-Type: {}; charset=\"utf-8\"\r\n",
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a.content_type()
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));
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}
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ret.push_str("Content-Disposition: attachment\r\n");
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ret.push_str(&format!(
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"Content-Transfer-Encoding: {}\r\n",
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content_transfer_encoding
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));
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ret.push_str("\r\n");
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if content_transfer_encoding == ContentTransferEncoding::Base64 {
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for line in BASE64_MIME.encode(a.raw()).trim().lines() {
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ret.push_str(line);
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ret.push_str("\r\n");
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}
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} else {
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for line in String::from_utf8_lossy(a.raw()).lines() {
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ret.push_str(line);
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ret.push_str("\r\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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#[cfg(test)]
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mod tests {
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use super::*;
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use std::str::FromStr;
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#[test]
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fn test_new() {
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let mut default = Draft::default();
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assert_eq!(
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Draft::from_str(&default.to_string().unwrap()).unwrap(),
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default
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);
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default.set_body("αδφαφσαφασ".to_string());
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assert_eq!(
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Draft::from_str(&default.to_string().unwrap()).unwrap(),
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default
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);
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default.set_body("ascii only".to_string());
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assert_eq!(
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Draft::from_str(&default.to_string().unwrap()).unwrap(),
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default
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);
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}
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#[test]
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fn test_attachments() {
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/*
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let mut default = Draft::default();
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default.set_body("αδφαφσαφασ".to_string());
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let mut file = std::fs::File::open("file path").unwrap();
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let mut contents = Vec::new();
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file.read_to_end(&mut contents).unwrap();
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let mut attachment = AttachmentBuilder::new(b"");
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attachment
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.set_raw(contents)
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.set_content_type(ContentType::Other {
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name: Some("images.jpeg".to_string()),
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tag: b"image/jpeg".to_vec(),
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})
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.set_content_transfer_encoding(ContentTransferEncoding::Base64);
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default.attachments_mut().push(attachment);
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println!("{}", default.finalise().unwrap());
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*/
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}
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}
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|
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/// Reads file from given path, and returns an 'application/octet-stream' AttachmentBuilder object
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pub fn attachment_from_file<I>(path: &I) -> Result<AttachmentBuilder>
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where
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I: AsRef<OsStr>,
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{
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let path: PathBuf = Path::new(path).expand();
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if !path.is_file() {
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return Err(MeliError::new(format!("{} is not a file", path.display())));
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}
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let mut file = std::fs::File::open(&path)?;
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let mut contents = Vec::new();
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file.read_to_end(&mut contents)?;
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let mut attachment = AttachmentBuilder::default();
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attachment
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.set_raw(contents)
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.set_body_to_raw()
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.set_content_type(ContentType::Other {
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name: path.file_name().map(|s| s.to_string_lossy().into()),
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tag: if let Ok(mime_type) = query_mime_info(&path) {
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mime_type
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} else {
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b"application/octet-stream".to_vec()
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},
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});
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Ok(attachment)
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}
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