[Task 3] Fix sse crash

task_3_react/src/server/main.ts

@@ -19,10 +19,13 @@ const storage = multer.diskStorage( {
     ) => {
     // Suggested in Multer's readme
         const uniqueSuffix = Date.now() + '-' + Math.round( Math.random() * 1E3 );
+        const fname = file.fieldname + '-' + uniqueSuffix;
+        // TODO: We could consider allowing the filename to be overwritten using a query param on the
+        // request (i.e. url would be /upload?fname=<filename>)
 
-        fileEvent.emit( 'uploaded', file.fieldname + '-' + uniqueSuffix );
+        fileEvent.emit( 'uploaded', fname );
 
-        cb( null, file.fieldname + '-' + uniqueSuffix );
+        cb( null, fname );
     }
 } );
 // CSV file upload endpoint
@@ -37,12 +40,11 @@ const fileEvent = new FileEvent();
 app.post(
     '/upload',
     upload.single( 'dataFile' ),
-    (
+    ( _req, res ) => {
-        req, res, next
+        // NOTE: We do only need the next function in the handler when we want a middleware,
-    ) => {
+        // otherwise we can simply omit it
-        console.log(
+        console.log( 'Uploaded file' );
-            req, res, next
+        res.send( 'Ok' );
-        );
     }
 );
 
@@ -140,10 +142,14 @@ const sendSSEData = ( event: string, data: string ) => {
     const subs = Object.values( subscribers );
 
     for ( let i = 0; i < subs.length; i++ ) {
-        subs[i]!.response.write( `data: ${ JSON.stringify( {
+        try {
-            'event': event,
+            subs[i]!.response.write( `data: ${ JSON.stringify( {
-            'data': data
+                'event': event,
-        } ) }\n\n` );
+                'data': data
+            } ) }\n\n` );
+        } catch ( e ) {
+            console.debug( e );
+        }
     }
 };
 

task_3_react/src/server/uploads/dataFile-1763362295232-475

@@ -0,0 +1,56 @@
+title,artist,dancingStyle
+1 Emperor's Dream,Ballroom Dance Orchestra & Marc Reift,Slow Walz
+2 Kaiserwalzer,Ballroom Dance Orchestra & Marc Reift,Wiener Walzer
+3  Macarena (Wish),Los del Mar,Flashmob
+4 Wannabe (Wish),Spice Girls,Discofox
+5 Dancing Queen (Wish),ABBA,Discofox
+6 Splish Splash,Bobby Darin,Jive/ Rocknroll
+"7 See You Later, Alligator",Bill Haley,Jive/ Rocknroll
+8 Rico Vacilon,Pedro Garcia & His Del Prado Orchestra,Cha Cha Cha
+9 El Diablo Anda Suelto,Rey Ruiz,Cha ch cha
+10 Hips Don't Lie (Wish,Shakira,Salsa/ Discofox
+11 Como Volver a Ser Feliz,Luis Enrique,Salsa
+12 Moon River,,Slow Walz
+13 Morning has broken,Cat Stevens,Wiener Walzer
+14 Jeepers creepers,Benny Goodmann,Discofox/Foxtrott
+15 ..Baby One More Time (Wish),Britney Spears,Discofox
+16 Can't Stop the Feeling! (Wish),Justin Timberlake,Discofox
+17 Tea for Two Cha Cha,Tommy Dorsey and His Orchestra,Cha ch cha
+18 Muevelo,Rey Ruiz,Cha ch cha
+19 I feel good,Ray Charles,Jive/Rocknroll
+21 Jailhouse Rock,Elvis Presley,Jive/Rocknroll
+22 Are you lonesome,Elvis Presley,Slow Walz
+23 Louenesee,Span,Walzer 
+24 Something Stupid,Michael Bubl<62>,Rumba/cha cha cha
+25 Stayin' Alive (wish),Bee Gees,Discofox
+26 Uptown Funk (Wish),Bruno Mars,Discofox
+27 suelta la cintura,Ruben leon,Cha ch cha
+28 Come Dance With Me,Michael Bubl<62>,cha cha cha
+29 Kiss me,Sixpence None the Richer,Discofox/Foxtrott
+30 ily (i love you baby) [feat. Emilee],Surf Mesa,Discofox
+31 Crazy Little Thing Called Love,Queen,Jive/ Rocknroll
+32 Great Balls of Fire,Jerry Lee Lewis,Jive/ Rocknroll
+33 La Bamba,Ritchie Valens,Jive/ Rocknroll
+34 Macho,Charles Fox,Salsa
+35 The Last Waltz,Engelbert Humperdinck,Walzer 
+36 An der sch<63>nen blauen Donau,New 101 Strings Orchestra,Wiener Walzer
+37 Dance The Night,Dua Lipa,Discofox
+38 Iko Iko,Justin Wellington,Discofox
+39 Beat It (Wish),Michael Jackson,Jive
+40 Super Freaky Girl (Wish),Nicki Minaj,Jive/ Rocknroll
+41 California Girls  (Wish),Katy Perry,Discofox
+3  Macarena (Wish),Los del Mar,Flashmob
+43 Ay Mujer,Rey Ruiz,Cha ch cha
+44 Lets get loud,Jennifer Lopez,Cha ch cha
+45 Friday,Riton & Nightcrawlers,Party
+46 Take On Me,a-ha,Party
+47 Gimme! Gimme! Gimme! (Wish),ABBA,Party
+48 I Gotta Feeling (Wish),Black Eyed Peas,Party
+49 Angels,Robbie Williams,Slow 
+50 Hangover (Wish),Taio Cruz,Party
+51 The Real Slim Shady (Wish),Eminem,Party
+52 I don't care,,Party
+53 YMCA,Village People,Party
+54  Cotton Eye Joe (Wish),Rednex,Sex & Violins
+55 Nothing compares to you,Sinhead O' Connor,Slow 
+56 Komet,Udo Lindenberg & Apache 207,Partyende