Add support for customizing the HTTP request operation class used by …

…`RKPaginator`. closes RestKit#1067

Code/Network/RKObjectManager.m

@@ -555,6 +555,7 @@ - (RKPaginator *)paginatorWithPathPattern:(NSString *)pathPattern
     paginator.managedObjectCache = self.managedObjectStore.managedObjectCache;
     paginator.fetchRequestBlocks = self.fetchRequestBlocks;
     paginator.operationQueue = self.operationQueue;
+    if (self.HTTPOperationClass) paginator.HTTPOperationClass = self.HTTPOperationClass;
     return paginator;
 }
 

Code/Network/RKPaginator.h

@@ -48,6 +48,10 @@
  */
 @interface RKPaginator : NSObject
 
+///-------------------------------------
+/// @name Initializing Paginator Objects
+///-------------------------------------
+
 /**
  Initializes a RKPaginator object with the a provided patternURL and mappingProvider.
 
@@ -57,8 +61,12 @@
  @return The receiver, initialized with the request, pagination mapping, and response descriptors.
  */
 - (id)initWithRequest:(NSURLRequest *)request
-              paginationMapping:(RKObjectMapping *)paginationMapping
-            responseDescriptors:(NSArray *)responseDescriptors;
+    paginationMapping:(RKObjectMapping *)paginationMapping
+  responseDescriptors:(NSArray *)responseDescriptors;
+
+///-----------------------------
+/// @name Configuring Networking
+///-----------------------------
 
 /**
  A URL with a path pattern for building a complete URL from
@@ -89,6 +97,13 @@
  */
 @property (nonatomic, strong) NSOperationQueue *operationQueue;
 
+/**
+ The `RKHTTPRequestOperation` subclass to be used for HTTP request operations made by the paginator.
+ 
+ **Default**: `[RKHTTPRequestOperation class]`
+ */
+@property (nonatomic, strong) Class HTTPOperationClass;
+
 ///-----------------------------------
 /// @name Setting the Completion Block
 ///-----------------------------------

Code/Network/RKPaginator.m

@@ -63,6 +63,7 @@ - (id)initWithRequest:(NSURLRequest *)request
     NSAssert([paginationMapping.objectClass isSubclassOfClass:[RKPaginator class]], @"The paginationMapping must have a target object class of `RKPaginator`");
     self = [super init];
     if (self) {
+        self.HTTPOperationClass = [RKHTTPRequestOperation class];
         self.request = request;
         self.paginationMapping = paginationMapping;
         self.responseDescriptors = responseDescriptors;
@@ -93,6 +94,12 @@ - (NSURL *)URL
     return [NSURL URLWithString:interpolatedString relativeToURL:self.request.URL];
 }
 
+- (void)setHTTPOperationClass:(Class)operationClass
+{
+    NSAssert(operationClass == nil || [operationClass isSubclassOfClass:[RKHTTPRequestOperation class]], @"The HTTP operation class must be a subclass of `RKHTTPRequestOperation`");
+    _HTTPOperationClass = operationClass;
+}
+
 - (void)setCompletionBlockWithSuccess:(void (^)(RKPaginator *paginator, NSArray *objects, NSUInteger page))success
                               failure:(void (^)(RKPaginator *paginator, NSError *error))failure
 {
@@ -159,7 +166,8 @@ - (void)loadPage:(NSUInteger)pageNumber
     mutableRequest.URL = self.URL;
 
     if (self.managedObjectContext) {
-        RKManagedObjectRequestOperation *managedObjectRequestOperation = [[RKManagedObjectRequestOperation alloc] initWithRequest:mutableRequest responseDescriptors:self.responseDescriptors];
+        RKHTTPRequestOperation *requestOperation = [[self.HTTPOperationClass alloc] initWithRequest:mutableRequest];
+        RKManagedObjectRequestOperation *managedObjectRequestOperation = [[RKManagedObjectRequestOperation alloc] initWithHTTPRequestOperation:requestOperation responseDescriptors:self.responseDescriptors];
         managedObjectRequestOperation.managedObjectContext = self.managedObjectContext;
         managedObjectRequestOperation.managedObjectCache = self.managedObjectCache;
         managedObjectRequestOperation.fetchRequestBlocks = self.fetchRequestBlocks;