/* Title: Pure/General/mailman.scala
Author: Makarius
Support for Mailman list servers.
*/
package isabelle
import java.net.URL
import scala.annotation.tailrec
import scala.util.matching.Regex
import scala.util.matching.Regex.Match
object Mailman
{
/* mailing list messages */
sealed case class Message(
name: String,
date: Date,
title: String,
author_name: String,
author_address: String,
body: String)
{
def print: String =
name + "\n" + date + "\n" + title + "\n" +
quote(author_name) + "\n" + "<" + author_address + ">\n"
}
def message_match(lines: List[String], re: Regex): Option[Match] =
lines.flatMap(re.findFirstMatchIn(_)).headOption
class Message_Chunk(bg: String = "", en: String = "")
{
def unapply(lines: List[String]): Option[List[String]] =
{
val res1 =
if (bg.isEmpty) Some(lines)
else {
lines.dropWhile(_ != bg) match {
case Nil => None
case _ :: rest => Some(rest)
}
}
if (en.isEmpty) res1
else {
res1 match {
case None => None
case Some(lines1) =>
val lines2 = lines1.takeWhile(_ != en)
if (lines1.drop(lines2.length).isEmpty) None else Some(lines2)
}
}
}
def get(lines: List[String]): List[String] =
unapply(lines) getOrElse
error("Missing delimiters:" +
(if (bg.nonEmpty) " " else "") + bg +
(if (en.nonEmpty) " " else "") + en)
}
object Address
{
def anchor(s: String): String = """<a href="[^"]*">""" + s + """</a>"""
def angl(s: String): String = """<""" + s + """>"""
def quot(s: String): String = """"""" + s + """""""
def paren(s: String): String = """\(""" + s + """\)"""
val adr = """([^<>]*? at [^<>]*?)"""
val any = """([^<>]*?)"""
val spc = """\s*"""
val Name1 = quot(anchor(any)).r
val Name2 = quot(any).r
val Name_Adr1 = (quot(anchor(any)) + spc + angl(anchor(adr))).r
val Name_Adr2 = (quot(any) + spc + angl(anchor(adr))).r
val Name_Adr3 = (anchor(any) + spc + angl(anchor(adr))).r
val Name_Adr4 = (any + spc + angl(anchor(adr))).r
val Adr_Name1 = (angl(anchor(adr)) + spc + paren(any)).r
val Adr_Name2 = (anchor(adr) + spc + paren(any)).r
val Adr1 = angl(anchor(adr)).r
val Adr2 = anchor(adr).r
def trim(s: String): String = HTML.input(s).replace(" at ", "@")
def unapply(s: String): Option[(String, String)] =
s match {
case Name1(a) => Some((trim(a), ""))
case Name2(a) => Some((trim(a), ""))
case Name_Adr1(a, b) => Some((trim(a), trim(b)))
case Name_Adr2(a, b) => Some((trim(a), trim(b)))
case Name_Adr3(a, b) => Some((trim(a), trim(b)))
case Name_Adr4(a, b) => Some((trim(a), trim(b)))
case Adr_Name1(b, a) => Some((trim(a), trim(b)))
case Adr_Name2(b, a) => Some((trim(a), trim(b)))
case Adr1(a) => Some(("", trim(a)))
case Adr2(a) => Some(("", trim(a)))
case _ => None
}
}
/* mailing list archives */
abstract class Archive(
url: URL,
name: String = "",
tag: String = "")
{
def message_regex: Regex
def message_content(href: String, lines: List[String]): Message
private val main_url: URL =
Url(Library.take_suffix[Char](_ == '/', Url.trim_index(url).toString.toList)._1.mkString + "/")
private val main_html = Url.read(main_url)
val list_name: String =
{
val title =
"""<title>The ([^</>]*) Archives</title>""".r.findFirstMatchIn(main_html).map(_.group(1))
(proper_string(name) orElse title).getOrElse(error("Failed to determine mailing list name"))
}
override def toString: String = list_name
def list_tag: String = proper_string(tag).getOrElse(list_name)
def read_text(href: String): String = Url.read(new URL(main_url, href))
def hrefs_text: List[String] =
"""href="([^"]+\.txt(?:\.gz)?)"""".r.findAllMatchIn(main_html).map(_.group(1)).toList
def hrefs_msg: List[String] =
(for {
href <- """href="([^"]+)/date.html"""".r.findAllMatchIn(main_html).map(_.group(1))
html = read_text(href + "/date.html")
msg <- message_regex.findAllMatchIn(html).map(_.group(1))
} yield href + "/" + msg).toList
def get(target_dir: Path, href: String, progress: Progress = new Progress): Option[Path] =
{
val dir = target_dir + Path.basic(list_name)
val path = dir + Path.explode(href)
val url = new URL(main_url, href)
val connection = url.openConnection
try {
val length = connection.getContentLengthLong
val timestamp = connection.getLastModified
val file = path.file
if (file.isFile && file.length == length && file.lastModified == timestamp) None
else {
Isabelle_System.make_directory(path.dir)
progress.echo("Getting " + url)
val bytes =
using(connection.getInputStream)(Bytes.read_stream(_, hint = length.toInt max 1024))
Bytes.write(file, bytes)
file.setLastModified(timestamp)
Some(path)
}
}
finally { connection.getInputStream.close() }
}
def download_text(target_dir: Path, progress: Progress = new Progress): List[Path] =
hrefs_text.flatMap(get(target_dir, _, progress = progress))
def download_msg(target_dir: Path, progress: Progress = new Progress): List[Path] =
hrefs_msg.flatMap(get(target_dir, _, progress = progress))
def download(target_dir: Path, progress: Progress = new Progress): List[Path] =
download_text(target_dir, progress = progress) :::
download_msg(target_dir, progress = progress)
def trim_title(str: String): String =
{
val Trim1 = ("""\s*\Q[""" + list_tag + """]\E\s*(.*)""").r
val Trim2 = """(?i:(?:re|fw|fwd)\s*:\s*)(.*)""".r
val Trim3 = """\[\s*(.*?)\s*\]""".r
@tailrec def trim(s: String): String =
s match {
case Trim1(s1) => trim(s1)
case Trim2(s1) => trim(s1)
case Trim3(s1) => trim(s1)
case _ => s
}
trim(str)
}
def trim_name(str: String): String = str.replaceAll("""\s+""", " ")
def get_messages(): List[Message] =
for (href <- hrefs_msg) yield message_content(href, split_lines(read_text(href)))
def find_messages(dir: Path): List[Message] =
{
for {
file <- File.find_files(dir.file, file => file.getName.endsWith(".html"))
rel_path <- File.relative_path(dir, File.path(file))
} yield message_content(rel_path.implode, split_lines(File.read(file)))
}
}
/* Isabelle mailing lists */
object Isabelle_Users extends Archive(
Url("https://lists.cam.ac.uk/pipermail/cl-isabelle-users"),
name = "isabelle-users", tag = "isabelle")
{
override def message_regex: Regex = """<li><a name="\d+" href="(msg\d+\.html)">""".r
private object Head extends
Message_Chunk(bg = "<!--X-Head-of-Message-->", en = "<!--X-Head-of-Message-End-->")
private object Body extends
Message_Chunk(bg = "<!--X-Body-of-Message-->", en = "<!--X-Body-of-Message-End-->")
private object Date_Format
{
private val Trim1 = """\w+,\s*(.*)""".r
private val Trim2 = """(.*?)\s*\(.*\)""".r
private val Format =
Date.Format(
"d MMM uuuu H:m:s Z",
"d MMM uuuu H:m:s z",
"d MMM yy H:m:s Z",
"d MMM yy H:m:s z")
def unapply(s: String): Option[Date] =
{
val s0 = s.replaceAll("""\s+""", " ")
val s1 =
s0 match {
case Trim1(s1) => s1
case _ => s0
}
val s2 =
s1 match {
case Trim2(s2) => s2
case _ => s1
}
Format.unapply(s2)
}
}
override def trim_name(str: String): String =
{
val Trim = """(.*?)\s*via\s+Cl-isabelle-users""".r
super.trim_name(str) match {
case Trim(s) => s
case s => s
}
}
override def message_content(href: String, lines: List[String]): Message =
{
def err(msg: String = ""): Nothing =
error("Malformed message: " + href + (if (msg.isEmpty) "" else "\n" + msg))
val (head, body) =
try { (Head.get(lines), Body.get(lines)) }
catch { case ERROR(msg) => err(msg) }
val date =
message_match(head, """<li><em>Date</em>:\s*(.*?)\s*</li>""".r)
.map(m => HTML.input(m.group(1))) match
{
case Some(Date_Format(d)) => d
case Some(s) => err("Malformed Date: " + quote(s))
case None => err("Missing Date")
}
val title =
HTML.input(message_match(head, """<li><em>Subject</em>:\s*(.*)</li>""".r)
.getOrElse(err("Missing Subject")).group(1))
val (author_name, author_address) =
message_match(head, """<li><em>From</em>:\s*(.*?)\s*</li>""".r) match {
case None => err("Missing From")
case Some(m) => Address.unapply(m.group(1)) getOrElse err("Malformed From")
}
Message(
href, date, trim_title(title),
trim_name(proper_string(author_name) getOrElse author_address),
author_address,
cat_lines(body))
}
}
object Isabelle_Dev extends Archive(Url("https://mailmanbroy.in.tum.de/pipermail/isabelle-dev"))
{
override def message_regex: Regex = """<LI><A HREF="(\d+\.html)">""".r
private object Head extends Message_Chunk(en = "<!--beginarticle-->")
private object Body extends Message_Chunk(bg = "<!--beginarticle-->", en = "<!--endarticle-->")
private object Date_Format
{
val Format = Date.Format("E MMM d H:m:s z uuuu")
def unapply(s: String): Option[Date] = Format.unapply(s.replaceAll("""\s+""", " "))
}
override def message_content(href: String, lines: List[String]): Message =
{
def err(msg: String = ""): Nothing =
error("Malformed message: " + href + (if (msg.isEmpty) "" else "\n" + msg))
val (head, body) =
try { (Head.get(lines), Body.get(lines)) }
catch { case ERROR(msg) => err(msg) }
val date =
message_match(head, """\s*<I>(.*)</I>""".r).map(m => HTML.input(m.group(1))) match {
case Some(Date_Format(d)) => d
case Some(s) => err("Malformed Date: " + quote(s))
case None => err("Missing Date")
}
val (title, author_address) =
{
message_match(head, """TITLE="([^"]+)">(.*)""".r) match {
case Some(m) => (HTML.input(m.group(1)), Address.trim(HTML.input(m.group(2))))
case None => err("Missing TITLE")
}
}
val author_name =
message_match(head, """\s*<B>(.*)</B>""".r) match {
case None => err("Missing author")
case Some(m) => HTML.input(m.group(1))
}
Message(
href, date, trim_title(title),
trim_name(proper_string(author_name) getOrElse author_address),
author_address,
cat_lines(body))
}
}
}