improve: add support of RFC5987 Content-Disposition formats (via #4952)

* Add support of RFC5987 for Content-Disposition

For example, `attachement; filename*=UTF-8'ru'%D1%81%D0%B2%D0%B5%D0%B4%D0%B5%D0%BD%D0%B8%D1%8F.xlsx` in result will be  `сведения.xlsx`.

* Test of support of RFC5987 in Content-Disposition

Author: gtors

src/core/utils.js

@@ -343,13 +343,27 @@ export function mapToList(map, keyNames="key", collectedKeys=Im.Map()) {
 }
 
 export function extractFileNameFromContentDispositionHeader(value){
-  let responseFilename = /filename="([^;]*);?"/i.exec(value)
-  if (responseFilename === null) {
-    responseFilename = /filename=([^;]*);?/i.exec(value)
-  }
+  let patterns = [
+    /filename\*=[^']+'\w*'"([^"]+)";?/i,
+    /filename\*=[^']+'\w*'([^;]+);?/i,
+    /filename="([^;]*);?"/i,
+    /filename=([^;]*);?/i
+  ]
+  
+  let responseFilename
+  patterns.some(regex => {
+    responseFilename = regex.exec(value)
+    return responseFilename !== null
+  })
+    
   if (responseFilename !== null && responseFilename.length > 1) {
-    return responseFilename[1]
+    try {
+      return decodeURIComponent(responseFilename[1])
+    } catch(e) {
+      console.error(e)
+    }
   }
+
   return null
 }
 
@@ -790,4 +804,4 @@ export function numberToString(thing) {
   }
 
   return thing
-}
+}

test/core/utils.js

@@ -109,6 +109,18 @@ describe("utils", function() {
       let expectedResult = "filename.jpg"
       expect(extractFileNameFromContentDispositionHeader(cdHeader)).toEqual(expectedResult)
     })
+    
+    it("should extract quoted filename in utf-8", function(){
+      let cdHeader = "attachment; filename*=UTF-8''\"%D1%84%D0%B0%D0%B9%D0%BB.txt\""
+      let expectedResult = "файл.txt"
+      expect(extractFileNameFromContentDispositionHeader(cdHeader)).toEqual(expectedResult)
+    })
+    
+    it("should extract filename in utf-8", function(){
+      let cdHeader = "attachment; filename*=utf-8'ru'%D1%84%D0%B0%D0%B9%D0%BB.txt"
+      let expectedResult = "файл.txt"
+      expect(extractFileNameFromContentDispositionHeader(cdHeader)).toEqual(expectedResult)
+    })
 
     it("should not extract filename and return null", function(){
       let cdHeader = "attachment; no file name provided"