From 3a3a6827695bbcc03235451622bd49b7655b1f41 Mon Sep 17 00:00:00 2001
From: Fabien Benetou <fabien@benetou.fr>
Date: Sat, 6 May 2023 07:17:03 +0200
Subject: [PATCH] sshfs mount example

---
 index.js | 76 +++++++++++++++++++++++++++++++++++++-------------------
 1 file changed, 50 insertions(+), 26 deletions(-)

diff --git a/index.js b/index.js
index 650f9a6..5bd8ec5 100644
--- a/index.js
+++ b/index.js
@@ -12,15 +12,10 @@ const port = process.env.PORT || 8082;
 const protocol = 'https'
 const subclass = '192.168.4.'
 
-// Setup and configure Express http server.
-const app = express();
-app.use(express.static(path.resolve(__dirname, ".", "examples")));
+const publicKeyPath = path.resolve(process.env.HOME,'.ssh','id_rsa_offlineoctopus.pub')
+const publicKey = fs.readFileSync(publicKeyPath).toString().split(' ')[1]
 
-app.use(function(req, res, next) {
-    res.header("Access-Control-Allow-Origin", "*"); 
-    res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
-    next();
-});
+const md5fromPub = fs.readFileSync( path.resolve(__dirname, ".keyfrommd5")).toString().replace('\n','')
 
 process.title = 'offtopus' // offline-octopus seems too long
 
@@ -69,16 +64,14 @@ const utilsCmd = { // security risk but for now not accepting user input so safe
 		// security risk if relying on user provided name, e.g replacing acorn by user input
 		// example that could be generalized to other package managers e.g .deb or opkg
 }
-
-// example to disentangle own work for cloning existing repositories
-// find ~/Prototypes/ -depth -maxdepth 4 -wholename "*/.git/config" | xargs grep -l git.benetou.fr | sed "s|.*Prototypes/\(.*\)/.git/config|\1|"
-
+// could be interesting to consider also recent containers and ~/.bashrc for services
 
 const instructions = `
 /home/deck/.ssh/
-	trusted context, i.e on closed WiFi and over https, still. could check as bearer
+	trusted context, i.e on closed WiFi and over https with bearer authorization
 /home/deck/.ssh/config
-	could limit to known IP range or class e.g cat .ssh/config | grep 192.168.4. -C 3
+	limit to known IP subclass e.g cat .ssh/config | grep 192.168.4. -C 3
+		see /sshconfig
 	could also re-add new entries rather than extend the format
 /home/deck/server.locatedb
 		seems to be plain text with metadata
@@ -99,6 +92,17 @@ util functions
 
 const auth_instructions = `generate md5 from pub offline-octopus then provide as bearer query param`
 
+// Setup and configure Express http server.
+const app = express();
+app.use(express.static(path.resolve(__dirname, ".", "examples")));
+
+// CORS
+app.use(function(req, res, next) {
+    res.header("Access-Control-Allow-Origin", "*"); 
+    res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
+    next();
+});
+
 app.get('/', (req, res) => {
 	res.send( instructions )
 })
@@ -108,6 +112,7 @@ app.get('/authtestviaheader', (req, res) => {
 	res.sendStatus(200)
 	// fetch('/authtestviaheader', {headers: {'authorization': 'Bearer '+ bearer}}).then(r=>r.text()).then(t=>console.log(t))
 		// prevents from showing in browser history but also makes testing slightly harder
+	// consider next() for middleware instead of copy/pasting this line
 })
 
 app.get('/authtest', (req, res) => {
@@ -270,18 +275,40 @@ app.get('/sshconfig', (req, res) => {
 	// should filter on foundPeers to avoid offline peers
 })
 
-// returns connections string for e.g sshfs
+// note that stopping this process removes the mounts
+function mountAll(){
+	getSshConfig().map( l => {
+		let cs = 'sshfs ' + l.name + ':'
+		if (l.custom)
+			cs+= l.custom
+		else
+			cs+='/home/'+l.user
+		return cs + ' ' + path.resolve(__dirname, "sshfsmounts", l.name)
+		} )
+		.map( l => execSync(l))
+}
+
 function getSshConfig(){
-	// here assume user deck
 	let txt = fs.readFileSync(sshconfigpath).toString()
 	return txt.split('Host ')
 		.filter( m => m.match(subclass) )
 		.map( c => {
-			p = c.replaceAll('    ','')
+			let all = c.replaceAll('    ','')
 				.split('\n')
+			let p = all
 				.filter(i=>i.match(/^[a-zA-Z]/));
-			return p.filter(pm=>pm.match('User '))[0].replace('User ','')+
-				p.filter(pm=>pm.match('HostName'))[0].replace('HostName ','@')
+			let custom = all
+				.filter(i=>i.match(/^#Dir /))[0]
+				?.split(' ')[1]
+			// custom ~/.ssh/config parameter as comment
+			// user here for home directory in termux
+
+			let user = p.filter(pm=>pm.match('User '))[0].replace('User ','')
+			let hostname = p.filter(pm=>pm.match('HostName'))[0].replace('HostName ','')
+			let connectionString = user + '@' + hostname
+			let port = p.filter(pm=>pm.match('Port'))[0]?.replace('Port ','')
+			if (port) connectionString += ':' + port
+			return {name: p[0], user, connectionString, custom}
 		})
 }
 
@@ -301,14 +328,11 @@ function getSshConfig(){
 	easier to revoke if need be
   */
 
-const publicKeyPath = path.resolve(process.env.HOME,'.ssh','id_rsa_offlineoctopus.pub')
-const publicKey = fs.readFileSync(publicKeyPath).toString().split(' ')[1]
-
-const md5fromPub = fs.readFileSync( path.resolve(__dirname, ".keyfrommd5")).toString().replace('\n','')
-
 app.get('/localprototypes', (req, res) => {
-	// res.json( spawn('find Prototypes/ -iwholename */.git/config | xargs grep git.benetou.fr') )
-	// should use execSync now
+	// examples to disentangle own work for cloned existing repositories :
+		// find Prototypes/ -iwholename */.git/config | xargs grep git.benetou.fr
+		// find ~/Prototypes/ -depth -maxdepth 4 -wholename "*/.git/config" | xargs grep -l git.benetou.fr | sed "s|.*Prototypes/\(.*\)/.git/config|\1|"
+	res.json( execConfiguredCommand('listprototypes') )
 })
 
 app.get('/editor/recover', (req, res) => {