initial commit - it sort of works a bit

5 files changed, 1072 insertions, 0 deletions

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+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..3a066b5
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,17 @@
+[package]
+name = "purlrs"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+dumb_cgi = "0.7.0"
+#anyhow = "1.0.71"
+#sqlx = { version = "0.6", features = [ "postgres", "macros", "runtime-tokio-native-tls", "tls" ] }
+#tokio = { version = "1", features = ["full"] }
+postgres = "0.18.0"
+regex = "1"
+dotenv = "0.15"
+url = "2"
+rand = "0.8.5"
diff --git a/src/cgidebug.rs b/src/cgidebug.rs
new file mode 100644
index 0000000..afdc7ca
--- /dev/null
+++ b/src/cgidebug.rs
@@ -0,0 +1,81 @@
+use std::io::Write;
+use std::env;
+use std::collections::btree_map::BTreeMap;
+ 
+fn write_stderr( msg : String ) {
+    let mut stderr = std::io::stderr();
+    write!(&mut stderr, "{}", msg).unwrap();
+}
+ 
+fn write_stderr_s( msg : &str ) {
+    write_stderr( msg.to_string() );
+}
+ 
+fn write_stdout( msg : String ) {
+    let mut stdout = std::io::stdout();
+    write!(&mut stdout, "{}", msg).unwrap();
+}
+ 
+fn write_stdout_s( msg : &str ) {
+    write_stdout( msg.to_string() );
+}
+ 
+fn html_escape( msg : String ) -> String {
+    let mut copy : String = String::with_capacity( msg.len() );
+ 
+    for thechar in msg.chars() {
+        if thechar == '&' {
+            copy.push_str( "&" );
+        } else if thechar == '<' {
+            copy.push_str( "&lt;" );
+        } else if thechar == '>' {
+            copy.push_str( "&gt;" );
+        } else if thechar == '\"' {
+            copy.push_str( "&quot;" );
+        } else {
+            copy.push( thechar );
+        }
+    }
+ 
+    return copy;
+}
+ 
+fn main() {
+    write_stdout_s( "Status: 301 Moved Permanently\n" );
+    write_stdout_s( "Location: https://www.vg.no\n" );
+    write_stdout_s( "Content-type: text/html\n" );
+    write_stdout_s( "\n" );
+    write_stdout_s( "<html>\n" );
+    write_stdout_s( "  <head>\n" );
+    write_stdout_s( "    <title>Rust CGI Test</title>\n" );
+    write_stdout_s( "    <style type=\"text/css\">\n" );
+    write_stdout_s( "      td { border:1px solid black; }\n" );
+    write_stdout_s( "      td { font-family:monospace; }\n" );
+    write_stdout_s( "      table { border-collapse:collapse; }\n" );
+    write_stdout_s( "    </style>\n" );
+    write_stdout_s( "  </head>\n" );
+    write_stdout_s( "  <body>\n" );
+    write_stdout_s( "    <h1>Environment</h1>\n" );
+    write_stdout_s( "    <table>\n" );
+    write_stdout_s( "      <tr><th>Key</th><th>Value</th></tr>\n" );
+ 
+    // copy environment into a BTreeMap which is sorted
+    let mut sortedmap : BTreeMap<String,String> = BTreeMap::new();
+    for (key, value) in env::vars() {
+        sortedmap.insert( key, value );
+    }
+ 
+    // output environment into HTML table
+    for (key, value) in sortedmap {
+        write_stdout(
+            format!(
+                "      <tr><td>{}</td><td>{}</td></tr>\n",
+                html_escape( key ),
+                html_escape( value )
+            )
+        );
+    }
+    write_stdout_s( "    </table>\n" );
+    write_stdout_s( "  </body>\n" );
+    write_stdout_s( "</html>\n" );
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..7a60081
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,165 @@
+//use std::io::Write;
+use dumb_cgi::{Request, EmptyResponse, Query};
+use postgres::{Client, NoTls};
+use std::process::exit;
+use regex::Regex;
+use dotenv;
+use url::Url;
+use rand::{thread_rng, Rng};
+use rand::distributions::Alphanumeric;
+
+
+// Get URL from database
+fn get_url(dburl:String, short: &str) -> Result<String, postgres::Error> {
+    // Connect to db
+    let mut client = Client::connect(&dburl, NoTls)?;
+
+    let row = client.query_one("SELECT url FROM shorts WHERE short = $1 LIMIT 1", &[&short])?;
+
+    if row.len() == 1 {
+        client.execute("UPDATE shorts SET count = count + 1, last_visited = now() WHERE short = $1;", &[&short])?;
+    }
+    client.close()?;
+
+    let url: String = row.get("url");
+
+    Ok(url)
+}
+
+fn insert_short(dburl:String, url: &str, short: &str, user: &str) -> Result<u64, postgres::Error> {
+    let mut client = Client::connect(&dburl, NoTls)?;
+
+    let n = client.execute("INSERT INTO shorts (url, short, created_by) VALUES ($1, $2, $3);", &[&url, &short, &user])?;
+    client.close()?;
+    Ok(n)
+}
+// Do the redirect
+// return std::io::Result<()> so we can use ? -
+// https://doc.rust-lang.org/std/result/#the-question-mark-operator-
+fn redirect(code:u16, url:&str) {
+    EmptyResponse::new(code)
+        .with_header("Location", url)
+        .with_content_type("text/plain")
+        .with_body(
+            format!("Redirecting to {}\n", url))
+        .respond().unwrap();
+    exit(0);
+}
+
+fn error(code:u16, msg:&str) {
+    EmptyResponse::new(code)
+        .with_content_type("text/plain")
+        .with_body(
+            format!("{} {}\n", code, msg))
+        .respond().unwrap();
+    exit(0);
+}
+
+// Print form
+fn print_form() {
+    let html = r#"<html>
+<head>
+    <title>PURL</title>
+</head>
+<body>
+    <form method="post" action="/purl.cgi" enctype="multipart/form-data" name="main">
+    Username: $user<br>
+    URL to shorten: <input type="text" name="url" size="50"><br>
+    Custom short: <input type="text" name="short"><br>
+    <input type="hidden" name="form" value="html">
+    <input type="submit" value="Submit">
+    </form>
+
+</body>
+</html>
+HTML
+"#;
+
+    EmptyResponse::new(200)
+        .with_content_type("text/html")
+        .with_body(html)
+        .respond().unwrap();
+    exit(0);
+}
+
+
+// Generate random short
+fn gen_short() -> String {
+    let rand_string: String = thread_rng()
+        .sample_iter(&Alphanumeric)
+        .take(thread_rng().gen_range(2..6))
+        .map(char::from)
+        .collect();
+
+    return rand_string;
+}
+
+
+
+// Do the dirty
+fn main() -> std::io::Result<()> {
+    // Get dburl from .env-file
+    let dburl = dotenv::var("DATABASE_URL").unwrap();
+    let prefix = dotenv::var("PREFIX").unwrap();
+
+    // Gather all request data from the environment and stdin.
+    let req = Request::new().unwrap();
+
+    // Find out what action we're performing
+    let action:&str = req.var("ACTION").unwrap_or("none");
+
+    match action {
+        "form" => print_form(),
+
+        "redirect" => {
+            // get DOCUMENT_URI
+            let docuri:&str = req.var("DOCUMENT_URI").unwrap_or("none");
+            // Trim / and + from start
+            let docuri = docuri.trim_start_matches(&['/', '+']);
+
+            // Make SURE docuri is a valid short
+            let shortregex = Regex::new(r"^[a-zA-Z0-9_-]+$").unwrap();
+            if !shortregex.is_match(docuri) {
+                error(400, "Bad Request");
+            }
+
+            // Fetch URL from postgres, and redirect or return 404
+            match get_url(dburl, docuri) {
+                Ok(url) => redirect(301, &url),
+                Err(_e) => error(404, "Not Found"),
+            };
+        },
+
+        "create" => {
+            match req.query() {
+                Query::None => redirect(303, "/purl.cgi"),
+                Query::Some(map) => {
+                    if map.iter().count() != 1 {
+                        error(400, "Bad Request\n\nIncorrect number of query items");
+                    }
+                    let url:&str = &map["url"];
+                    if !Url::parse(url).is_ok() {
+                        error(400, "Bad Request\n\nInvalid url");
+                    }
+
+                    let user:&str = req.var("REMOTE_USER").unwrap_or("none");
+                    let short:&str = &gen_short();
+                    let res:String = format!("{}{}", prefix, short);
+                    if insert_short(dburl, url, short, user).unwrap() > 0 {
+                        error(200, &res);
+                    } else {
+                        error(400, "Bad Request\n\nDunno wtf happened");
+                    }
+                    exit(0);
+
+                },
+                Query::Err(_e) => error(400,"Bad Request\n\nError reading query string"),
+            }
+        },
+
+        _ => error(400, "Bad Request"),
+    }
+
+
+    Ok(())
+}