Add copies parameter

index.js

@@ -61,7 +61,8 @@ app.get('/', (req, res) => {
       - Prints IPP jobs
     - POST /print?printer=:name (body: application/pdf)
       - Prints a PDF
-      - :name - printer name or alias (case insensitive)
+      - ?printer= printer name or alias (case insensitive)
+      - ?copies= (optional) number of copies (1-10 allowed)
       - Response: 200 OK if sent to printer successfully (not necessarily printed), 4xx/5xx otherwise
   </pre>`)
 })
@@ -106,12 +107,12 @@ app.get('/printers/:name/jobs', (req, res) => {
 
 // --- Print API ---
 
-app.post('/print', bodyParser.raw({ type: '*/*' }), (req, res) => {
+app.post('/print', bodyParser.raw({ type: '*/*', limit: 10_000_000 }), (req, res) => {
   const { body, query } = req
   console.log("Received print job: ", { body, query })
 
   // validate query params
-  const { printer: printerName, ...otherParams } = query
+  const { printer: printerName, copies: copiesParam, ...otherParams } = query
   if (!printerName) {
     res.status(400).send("No printer specified, pass ?printer=:name in the query params")
     return
@@ -134,8 +135,12 @@ app.post('/print', bodyParser.raw({ type: '*/*' }), (req, res) => {
   } else if (body.subarray(0, 4).toString() !== "%PDF") {
     res.status(415).send("Data does not look like a PDF, please send a PDF")
     return
-  } else if (body.length > 10_000_000) {
-    res.status(413).send("Data too large (limit: 10MB), please send a smaller PDF")
+  }
+
+  // validate job attributes
+  const copies = Number(copiesParam) || 1
+  if (!(copies >= 1 && copies <= 10)) {
+    res.status(400).send("Copies must be between 1 and 10")
     return
   }
 
@@ -145,8 +150,7 @@ app.post('/print', bodyParser.raw({ type: '*/*' }), (req, res) => {
       "document-format": "application/pdf",
     },
     "job-attributes-tag": {
-      // FIXME: This should work, but does not
-      // "copies": 2,
+      "copies": copies,
     },
     data: body
   };