Move back to mainline mail-parser

- this removes the bug introduced in 0fe5fe071
- but adds some bugs where the body structure is not returned properly

Cargo.lock

@@ -1366,7 +1366,8 @@ dependencies = [
 [[package]]
 name = "mail-parser"
 version = "0.4.8"
-source = "git+https://github.com/superboum/mail-parser?rev=db61a03#db61a0364c00d3cf115f20c6d195bfa4594c53ff"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c46a841ae5276aba5218ade7bb76896358f9f95a925c7b3deea6a0ec0fb8e2a7"
 dependencies = [
  "encoding_rs",
  "serde",

Cargo.toml

@@ -21,7 +21,7 @@ itertools = "0.10"
 lazy_static = "1.4"
 ldap3 = { version = "0.10", default-features = false, features = ["tls"] }
 log = "0.4"
-mail-parser = { git = "https://github.com/superboum/mail-parser", rev = "db61a03" }
+mail-parser = "0.4.8"
 pretty_env_logger = "0.4"
 rusoto_core = "0.48.0"
 rusoto_credential = "0.48.0"

src/imap/mailbox_view.rs

@@ -675,7 +675,7 @@ fn build_imap_email_struct<'a>(
                     unreachable!("A multipart entry can not be found here.")
                 }
                 MessagePart::Text(bp) | MessagePart::Html(bp) => {
-                    let (attrs, mut basic) = headers_to_basic_fields(bp)?;
+                    let (attrs, mut basic) = headers_to_basic_fields(bp, bp.body.len())?;
 
                     // If the charset is not defined, set it to "us-ascii"
                     if attrs.charset.is_none() {
@@ -704,7 +704,10 @@ fn build_imap_email_struct<'a>(
                                     // We do not count the number of lines but the number of line
                                     // feeds to have the same behavior as Dovecot and Cyrus.
                                     // 2 lines = 1 line feed.
-                                    bp.body_raw.as_ref().iter().filter(|&c| c == &b'\n').count(),
+                                    // @FIXME+BUG: if the body is base64-encoded, this returns the
+                                    // number of lines in the decoded body, however we should
+                                    // instead return the number of raw base64 lines
+                                    bp.body.as_ref().chars().filter(|&c| c == '\n').count(),
                                 )?,
                             },
                         },
@@ -712,7 +715,7 @@ fn build_imap_email_struct<'a>(
                     })
                 }
                 MessagePart::Binary(bp) | MessagePart::InlineBinary(bp) => {
-                    let (_, basic) = headers_to_basic_fields(bp)?;
+                    let (_, basic) = headers_to_basic_fields(bp, bp.body.len())?;
 
                     let ct = bp
                         .get_content_type()
@@ -742,41 +745,21 @@ fn build_imap_email_struct<'a>(
                     })
                 }
                 MessagePart::Message(bp) => {
-                    let (_, mut basic) = headers_to_basic_fields(bp)?;
-
                     // @NOTE in some cases mail-parser does not parse the MessageAttachment but
-                    // provide it as raw body. Using `as_ref()` masks this fact: if the message is
+                    // provide it as raw body. By looking quickly at the code, it seems that the
-                    // parsed, as_ref() will return None. But by looking quickly at the code, it
+                    // attachment is not parsed when mail-parser encounters some encoding problems.
-                    // seems that the attachment is not parsed when mail-parser encounters some
+                    match &bp.body {
-                    // encoding problems, so it might be better to trust mail-parser.
+                        MessageAttachment::Parsed(inner) => {
-                    let inner = bp
+                            // @FIXME+BUG mail-parser does not handle ways when a MIME message contains
-                        .get_body()
+                            // a raw email and wrongly take its delimiter. The size and number of
-                        .as_ref()
+                            // lines returned in that case are wrong. A patch to mail-parser is
-                        .ok_or(anyhow!("Unable to parse inner message."))?;
+                            // needed to fix this.
-
+                            let (_, basic) = headers_to_basic_fields(bp, inner.raw_message.len())?;
-                    // @FIXME mail-parser does not handle ways when a MIME message contains
-                    // a raw email and wrongly take its delimiter. We thus test the headers to
-                    // learn if it is a RFC822 email (raw) or RFC5322 (MIME) message.
-                    // The correct way would be to patch mail-parser.
-                    let raw_msg = match part.unwrap_message().get_content_type() {
-                        Some(ContentType {
-                            attributes: Some(_),
-                            ..
-                        }) => {
-                            //println!("has a content type {:?}", bp);
-                            &inner.raw_message[..]
-                        }
-                        _ => {
-                            //println!("has no content type {:?}", bp);
-                            &inner.raw_message[..(inner.offset_last_part - inner.offset_header)]
-                        }
-                    };
-                    basic.size = u32::try_from(raw_msg.len())?;
 
                             // We do not count the number of lines but the number of line
                             // feeds to have the same behavior as Dovecot and Cyrus.
                             // 2 lines = 1 line feed.
-                    let nol = raw_msg.iter().filter(|&c| c == &b'\n').count();
+                            let nol = inner.raw_message.iter().filter(|&c| c == &b'\n').count();
 
                             Ok(BodyStructure::Single {
                                 body: FetchBody {
@@ -800,6 +783,40 @@ fn build_imap_email_struct<'a>(
                                 extension: None,
                             })
                         }
+                        MessageAttachment::Raw(raw_msg) => {
+                            let (_, basic) = headers_to_basic_fields(bp, raw_msg.len())?;
+
+                            let ct = bp
+                                .get_content_type()
+                                .ok_or(anyhow!("Content-Type is missing but required here."))?;
+
+                            let type_ =
+                                IString::try_from(ct.c_type.as_ref().to_string()).map_err(|_| {
+                                    anyhow!("Unable to build IString from given Content-Type type given")
+                                })?;
+
+                            let subtype = IString::try_from(
+                                ct.c_subtype
+                                    .as_ref()
+                                    .ok_or(anyhow!("Content-Type invalid, missing subtype"))?
+                                    .to_string(),
+                            )
+                            .map_err(|_| {
+                                anyhow!(
+                                    "Unable to build IString from given Content-Type subtype given"
+                                )
+                            })?;
+
+                            Ok(BodyStructure::Single {
+                                body: FetchBody {
+                                    basic,
+                                    specific: SpecificFields::Basic { type_, subtype },
+                                },
+                                extension: None,
+                            })
+                        }
+                    }
+                }
             }
         }
         MessageStructure::List(lp) => {
@@ -934,7 +951,10 @@ fn attrs_to_params<'a>(bp: &impl MimeHeaders<'a>) -> (SpecialAttrs, Vec<(IString
 
 /// Takes mail-parser headers and build imap-codec BasicFields
 /// Return some special informations too
-fn headers_to_basic_fields<'a, T>(bp: &'a Part<T>) -> Result<(SpecialAttrs<'a>, BasicFields)> {
+fn headers_to_basic_fields<'a, T>(
+    bp: &'a Part<T>,
+    size: usize,
+) -> Result<(SpecialAttrs<'a>, BasicFields)> {
     let (attrs, parameter_list) = attrs_to_params(bp);
 
     let bf = BasicFields {
@@ -963,7 +983,7 @@ fn headers_to_basic_fields<'a, T>(bp: &'a Part<T>) -> Result<(SpecialAttrs<'a>,
             .flatten()
             .unwrap_or(unchecked_istring("7bit")),
 
-        size: u32::try_from(bp.body_raw.len())?,
+        size: u32::try_from(size)?,
     };
 
     Ok((attrs, bf))

src/main.rs

@@ -9,9 +9,6 @@ mod mail;
 mod server;
 mod time;
 
-#[cfg(test)]
-mod mail_parser_tests;
-
 use std::path::PathBuf;
 
 use anyhow::{bail, Result};

tests/parsing-crates/mail_parser.rs

@@ -1,10 +1,10 @@
 use mail_parser_superboum::Message; // FAIL
+
 //use mail_parser_048::Message;				// PASS
 //use mail_parser_05::Message;				// PASS
 //use mail_parser_main::Message;			// PASS
 //use mail_parser_db61a03::Message;			// PASS
 
-
 #[test]
 fn test1() {
     let input = br#"Content-Type: multipart/mixed; boundary="1234567890123456789012345678901234567890123456789012345678901234567890123456789012"
@@ -37,7 +37,6 @@ Content-Type: text/plain
     dbg!(message);
 }
 
-
 #[test]
 fn test2() {
     let input = br#"Content-Type: message/rfc822
@@ -54,7 +53,7 @@ Content-Type: text/plain
 
 #[test]
 fn test3() {
-let input = br#"Content-Type: multipart/mixed; boundary=":foo"
+    let input = br#"Content-Type: multipart/mixed; boundary=":foo"
 
 --:foo
 --:foo