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Extract tnef attachments and fix incomplete html

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The wkhtmltopdf requires the content encoding set correctly in the
document.
This commit is contained in:
Eike Kettner
2020-03-24 23:27:24 +01:00
parent 0b80572664
commit e305b46708
3 changed files with 46 additions and 7 deletions
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2
build.sbt
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@ -204,6 +204,7 @@ val store = project.in(file("modules/store")).
Dependencies.flyway ++
Dependencies.loggingApi ++
Dependencies.emil ++
Dependencies.emilDoobie ++
Dependencies.calev
).dependsOn(common)
@ -293,6 +294,7 @@ val joex = project.in(file("modules/joex")).
Dependencies.http4s ++
Dependencies.circe ++
Dependencies.pureconfig ++
Dependencies.emilTnef ++
Dependencies.loggingApi ++
Dependencies.logging.map(_ % Runtime),
addCompilerPlugin(Dependencies.kindProjectorPlugin),

49
modules/joex/src/main/scala/docspell/joex/mail/ReadMail.scala
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@ -5,17 +5,21 @@ import cats.implicits._
import fs2.{Pipe, Stream}
import emil.{MimeType => _, _}
import emil.javamail.syntax._
import cats.Applicative
import emil.tnef.TnefExtract
import docspell.common._
import java.nio.charset.StandardCharsets
import java.nio.charset.Charset
import scodec.bits.ByteVector
object ReadMail {
def read[F[_]: Sync](str: String): F[Mail[F]] =
Mail.deserialize(str)
def readBytesP[F[_]: Sync](logger: Logger[F]): Pipe[F, Byte, Binary[F]] =
def readBytesP[F[_]: ConcurrentEffect: ContextShift](
logger: Logger[F]
): Pipe[F, Byte, Binary[F]] =
s =>
Stream.eval(logger.debug(s"Converting e-mail into its parts")) >>
bytesToMail(s).flatMap(mailToEntries[F](logger))
@ -23,14 +27,14 @@ object ReadMail {
def bytesToMail[F[_]: Sync](data: Stream[F, Byte]): Stream[F, Mail[F]] =
data.through(Binary.decode(StandardCharsets.US_ASCII)).foldMonoid.evalMap(read[F])
def mailToEntries[F[_]: Applicative](
def mailToEntries[F[_]: ConcurrentEffect: ContextShift](
logger: Logger[F]
)(mail: Mail[F]): Stream[F, Binary[F]] = {
val bodyEntry: F[Option[Binary[F]]] = mail.body.fold(
_ => (None: Option[Binary[F]]).pure[F],
txt => txt.text.map(c => Binary.text[F]("mail.txt", c.bytes, c.charsetOrUtf8).some),
html => html.html.map(c => Binary.html[F]("mail.html", c.bytes, c.charsetOrUtf8).some),
both => both.html.map(c => Binary.html[F]("mail.html", c.bytes, c.charsetOrUtf8).some)
html => html.html.map(c => makeHtmlBinary(c).some),
both => both.html.map(c => makeHtmlBinary(c).some)
)
Stream.eval(
@ -42,12 +46,33 @@ object ReadMail {
.eval(bodyEntry)
.flatMap(e => Stream.emits(e.toSeq)) ++
Stream
.emits(mail.attachments.all)
.eval(TnefExtract.replace(mail))
.flatMap(m => Stream.emits(m.attachments.all))
.map(a =>
Binary(a.filename.getOrElse("noname"), a.mimeType.toDocspell, a.content)
))
}
private def makeHtmlBinary[F[_]](cnt: BodyContent): Binary[F] = {
val c = fixHtml(cnt)
Binary.html[F]("mail.html", c.bytes, c.charsetOrUtf8)
}
private def fixHtml(cnt: BodyContent): BodyContent = {
val str = cnt.asString.trim.toLowerCase
val head = htmlHeader(cnt.charsetOrUtf8)
if (str.startsWith("<html")) cnt
else cnt match {
case BodyContent.StringContent(s) =>
BodyContent(head + s + htmlHeaderEnd)
case BodyContent.ByteContent(bv, cs) =>
val begin = ByteVector.view(head.getBytes(cnt.charsetOrUtf8))
val end = ByteVector.view(htmlHeaderEnd.getBytes(cnt.charsetOrUtf8))
BodyContent(begin ++ bv ++ end, cs)
}
}
implicit class MimeTypeConv(m: emil.MimeType) {
def toDocspell: MimeType =
MimeType(m.primary, m.sub, m.params)
@ -60,4 +85,16 @@ object ReadMail {
_ => "html-body",
_ => "text-and-html-body"
)
private def htmlHeader(cs: Charset): String =
s"""<!DOCTYPE html>
|<html>
|<head>
|<meta charset="${cs.name}"/>
|</head>
|<body>
"""
private def htmlHeaderEnd: String =
"</body></html>"
}

2
modules/joex/src/main/scala/docspell/joex/process/ExtractArchive.scala
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@ -126,7 +126,7 @@ object ExtractArchive {
.lastOrError
}
def extractMail[F[_]: Sync](
def extractMail[F[_]: ConcurrentEffect: ContextShift](
ctx: Context[F, _],
archive: Option[RAttachmentArchive]
)(ra: RAttachment): F[Extracted] = {