From d8ebd51ec6fada12dce3c2e96a43a7b444cdf899 Mon Sep 17 00:00:00 2001
From: Yannik <>
Date: Thu, 10 Oct 2019 00:47:07 +0200
Subject: [PATCH] initial commit

---
 .gitignore  |    2 +
 Cargo.lock  | 1258 +++++++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml  |   18 +
 src/main.rs |  106 +++++
 4 files changed, 1384 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 src/main.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..53eaa21
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
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+**/*.rs.bk
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..09aa6cc
--- /dev/null
+++ b/Cargo.lock
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..1a00fdc
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,18 @@
+[package]
+name = "log2db"
+version = "0.1.0"
+authors = ["Yannik"]
+edition = "2018"
+
+[dependencies]
+structopt = "*"
+tokio = "0.2.0-alpha.6"
+chrono = "*"
+
+[dependencies.tokio-postgres]
+git = "https://github.com/sfackler/rust-postgres.git"
+features = ["with-chrono-0_4"]
+
+[dependencies.futures-preview]
+version = "=0.3.0-alpha.19"
+features = [ "async-await" ]
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..32d29aa
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,106 @@
+use std::str::FromStr;
+
+use tokio_postgres::{Config, NoTls, Client, Statement};
+
+use tokio::net::{TcpListener, TcpStream};
+use tokio::prelude::*;
+
+use std::net::SocketAddr;
+use std::sync::Arc;
+
+type Error = Box<dyn std::error::Error>;
+
+#[tokio::main]
+async fn main() -> Result<(), Error> {
+    //todo: read config from args/env/file
+
+    let mut cfg = Config::from_str("postgres://log:log@localhost")?;
+    cfg.application_name("log2db");
+    let (client, connection) = cfg.connect(NoTls).await?;
+
+    let connection = connection.map(|r| {
+        if let Err(e) = r {
+            eprintln!("could not connect to database: {}", e);
+        }
+    });
+    tokio::spawn(connection);
+
+    client.execute("create table if not exists log(
+        rcv_ip inet,
+        rcv_date timestamptz,
+        date timestamptz,
+        daemon varchar,
+        message varchar
+        )
+        ", &[]).await?;
+
+    let client = Arc::new(client);
+
+    let insert_statement = client
+        .prepare("insert into log(rcv_ip, rcv_date, date, daemon, message) values ($1, $2, $3, $4, $5)").await?;
+
+    let addr = "[::]:8080";
+    let mut listener = TcpListener::bind(&addr).await?;
+
+    loop {
+        match listener.accept().await  {
+            Ok((socket, peer)) => {
+                tokio::spawn(
+                    handle_peer_and_error(socket, peer, client.clone(), insert_statement.clone())
+                    );
+            },
+            Err(e) => eprintln!("{:?}", e),
+        }
+    }
+}
+
+use chrono::{Local, DateTime, FixedOffset};
+
+async fn handle_peer_and_error(stream: TcpStream, peer: SocketAddr, db: Arc<Client>, insert_statement: Statement) {
+    if let Err(e) = handle_peer(stream, peer, db, insert_statement).await {
+        eprintln!("{}", e);
+    }
+}
+
+async fn handle_peer(stream: TcpStream, peer: SocketAddr, db: Arc<Client>, insert_statement: Statement) 
+-> Result<(), Error> {
+    use tokio::codec::{FramedRead, LinesCodec};
+
+    let ip = peer.ip();
+
+    let mut lines = FramedRead::new(stream, LinesCodec::new());
+    loop {
+        match lines.next().await.transpose()? {
+            Some(line) => {
+                let (now, date, service, log) = parse_line(&line)?;
+                // filter out some services
+                db.execute(&insert_statement, &[&ip, &now, &date, &service, &log]).await?;
+            },
+            None => break,
+        }
+    }
+    Ok(())
+}
+
+/** parses a line, returning
+ * ( time the log was recieved
+ * , time the log was written according to logger
+ * , name of the service that wrote the log
+ * , log entry
+ * )
+ */
+fn parse_line(line: &'_ str) -> Result<(DateTime<Local>, DateTime<FixedOffset>, &'_ str, &'_ str), Error> {
+    let (date, line) = line.split_at(16);
+
+    // we need to prepend the current year and timezone, as that is not stated in the logfile
+    let now = chrono::Local::now();
+    let mut base = format!("{}", now.format("%Y %z "));
+    base.push_str(date);
+
+    let date = DateTime::parse_from_str(&base, "%Y %z %b %e %H:%M:%S ")?;
+
+    let mut parts = line.splitn(2, ':');
+    let service = parts.next().ok_or("could not parse service")?;
+    let log = parts.next().ok_or("could not parse logfile")?.trim();
+    Ok((now, date, service, log))
+}