feat: set response headers provded by SAS Code execution

api/src/utils/specs/extractHeaders.spec.ts

@@ -0,0 +1,40 @@
+import { extractHeaders } from '..'
+
+describe('extractHeaders', () => {
+  it('should return valid http headers', () => {
+    const headers = extractHeaders(`
+      Content-type: application/csv
+      Cache-Control: public, max-age=2000
+      Content-type: application/text
+      Cache-Control: public, max-age=1500
+      Content-type: application/zip
+      Cache-Control: public, max-age=1000
+    `)
+
+    expect(headers).toEqual({
+      'Content-type': 'application/zip',
+      'Cache-Control': 'public, max-age=1000'
+    })
+  })
+
+  it('should not return http headers if last occurrence is blank', () => {
+    const headers = extractHeaders(`
+      Content-type: application/csv
+      Cache-Control: public, max-age=1000
+      Content-type: application/text
+      Content-type:    
+    `)
+
+    expect(headers).toEqual({ 'Cache-Control': 'public, max-age=1000' })
+  })
+
+  it('should return only valid http headers', () => {
+    const headers = extractHeaders(`
+      Content-type[]: application/csv
+      Content//-type: application/text
+      Content()-type: application/zip
+    `)
+
+    expect(headers).toEqual({})
+  })
+})