Improve epub detection

Author: Alexey Novikov

Sources/FileType/zip+office.swift

@@ -23,7 +23,7 @@ func matchZipHeader(_ data: Data, _ match: (ZipHeader) -> Bool) -> Bool {
     position += 30 + filenameLength + extraFieldLength
 
     if zipHeader.filename == "mimetype", compressedSize == uncompressedSize {
-      zipHeader.mimeType = data.getString(from: position ..< position + compressedSize)
+      zipHeader.mimeType = data.getString(from: position ..< position + compressedSize)?.trimmingCharacters(in: .whitespacesAndNewlines)
     }
 
     if match(zipHeader) {

Tests/FileTypeTests/FileTypeTests.swift

@@ -175,7 +175,7 @@ final class FileTypeTests: XCTestCase {
     testFileType("fixture.ppt.cfb", type: .cfb)
     testFileType("fixture-2.doc.cfb", type: .cfb)
   }
-  
+
   func testMatroska() {
     testFileType("fixture2.mkv", type: .mkv)
     testFileType("fixture-null.webm", type: .webm)
@@ -189,6 +189,10 @@ final class FileTypeTests: XCTestCase {
     testFileType("fixture-printed.pdf", type: .pdf)
   }
 
+  func testEPUB() {
+    testFileType("fixture-crlf.epub", type: .epub)
+  }
+
   func testBytesCountForType() {
     XCTAssertEqual(FileType.getBytesCountFor(type: .ac3), 2)
     XCTAssertEqual(FileType.getBytesCountFor(type: .zip), 4)
@@ -223,7 +227,9 @@ final class FileTypeTests: XCTestCase {
     ("testASF", testASF),
     ("testJXL", testJXL),
     ("testCFB", testCFB),
+    ("testMatroska", testMatroska),
     ("testPDF", testPDF),
+    ("testEPUB", testEPUB),
 
     ("testBytesCountForType", testBytesCountForType),
     ("testBytesCountForTypes", testBytesCountForTypes),