Fp fix multipart request optional boudary

Haitch.xcodeproj/project.pbxproj

@@ -324,14 +324,14 @@
 				TargetAttributes = {
 					A3034B7F1BFD61F4003F8705 = {
 						CreatedOnToolsVersion = 7.1.1;
-						LastSwiftMigration = 0800;
+						LastSwiftMigration = 0810;
 					};
 					A3034B8F1BFD6229003F8705 = {
 						CreatedOnToolsVersion = 7.1.1;
 					};
 					CA8887F71D400317005A8390 = {
 						CreatedOnToolsVersion = 7.3.1;
-						LastSwiftMigration = 0800;
+						LastSwiftMigration = 0810;
 					};
 				};
 			};

Source/Core/MultipartRequestBody.swift

@@ -179,7 +179,7 @@ open class MultipartRequestBody : RequestBody {
 
   /// The boundary value of the MultipartRequestBody.  Defaulted in the initializer to
   /// "Boundary+\(arc4random())\(arc4random())"
-  open var boundary: String!
+  open var boundary: String = ""
   /// The boundary carriage returns and line feed value. Defaults to "\r\n"
   open var boundaryCRLF = "\r\n"
 
@@ -192,6 +192,7 @@ open class MultipartRequestBody : RequestBody {
   public override init() {
     super.init()
     self.boundary = "Boundary+\(arc4random())\(arc4random())"
+    self.contentType = "multipart/form-data; boundary=\(self.boundary)"
   }
 
   /**

Source/Helpers/NetHelper.swift

@@ -56,10 +56,10 @@ open class NetHelper {
     let parts: [HttpKeyPair] = params.allParams()
     for keyPair: HttpKeyPair in parts {
       let isMultiVal = params.isKeyMultiValue(key: keyPair.key)
-      let prefix = keyPair.escapedKeyPrefix ?? ""
+      let prefix = keyPair.escapedKeyPrefix
       var suffix = ""
       if isMultiVal {
-        suffix = keyPair.escapedKeySuffix ?? ""
+        suffix = keyPair.escapedKeySuffix
       }
       queryStringVal += "\(keyPair.toPartString(keyPrefix: prefix, keySuffix: suffix))&"
     }