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AFHTTPRequestOperation.h

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+// AFHTTPRequestOperation.h
+//
+// Copyright (c) 2011 Gowalla (http://gowalla.com/)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <Foundation/Foundation.h>
+#import "AFURLConnectionOperation.h"
+
+/**
+ `AFHTTPRequestOperation` is a subclass of `AFURLConnectionOperation` for requests using the HTTP or HTTPS protocols. It encapsulates the concept of acceptable status codes and content types, which determine the success or failure of a request.
+ */
+@interface AFHTTPRequestOperation : AFURLConnectionOperation
+
+///----------------------------------------------
+/// @name Getting HTTP URL Connection Information
+///----------------------------------------------
+
+/**
+ The last HTTP response received by the operation's connection.
+ */
+@property (readonly, nonatomic, strong) NSHTTPURLResponse *response;
+
+///----------------------------------------------------------
+/// @name Managing And Checking For Acceptable HTTP Responses
+///----------------------------------------------------------
+
+/**
+ A Boolean value that corresponds to whether the status code of the response is within the specified set of acceptable status codes. Returns `YES` if `acceptableStatusCodes` is `nil`.
+ */
+@property (nonatomic, readonly) BOOL hasAcceptableStatusCode;
+
+/**
+ A Boolean value that corresponds to whether the MIME type of the response is among the specified set of acceptable content types. Returns `YES` if `acceptableContentTypes` is `nil`.
+ */
+@property (nonatomic, readonly) BOOL hasAcceptableContentType;
+
+/**
+ The callback dispatch queue on success. If `NULL` (default), the main queue is used.
+ */
+@property (nonatomic, assign) dispatch_queue_t successCallbackQueue;
+
+/**
+ The callback dispatch queue on failure. If `NULL` (default), the main queue is used.
+ */
+@property (nonatomic, assign) dispatch_queue_t failureCallbackQueue;
+
+///------------------------------------------------------------
+/// @name Managing Acceptable HTTP Status Codes & Content Types
+///------------------------------------------------------------
+
+/**
+ Returns an `NSIndexSet` object containing the ranges of acceptable HTTP status codes. When non-`nil`, the operation will set the `error` property to an error in `AFErrorDomain`. See http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
+
+ By default, this is the range 200 to 299, inclusive.
+ */
++ (NSIndexSet *)acceptableStatusCodes;
+
+/**
+ Adds status codes to the set of acceptable HTTP status codes returned by `+acceptableStatusCodes` in subsequent calls by this class and its descendants.
+
+ @param statusCodes The status codes to be added to the set of acceptable HTTP status codes
+ */
++ (void)addAcceptableStatusCodes:(NSIndexSet *)statusCodes;
+
+/**
+ Returns an `NSSet` object containing the acceptable MIME types. When non-`nil`, the operation will set the `error` property to an error in `AFErrorDomain`. See http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.17
+
+ By default, this is `nil`.
+ */
++ (NSSet *)acceptableContentTypes;
+
+/**
+ Adds content types to the set of acceptable MIME types returned by `+acceptableContentTypes` in subsequent calls by this class and its descendants.
+
+ @param contentTypes The content types to be added to the set of acceptable MIME types
+ */
++ (void)addAcceptableContentTypes:(NSSet *)contentTypes;
+
+
+///-----------------------------------------------------
+/// @name Determining Whether A Request Can Be Processed
+///-----------------------------------------------------
+
+/**
+ A Boolean value determining whether or not the class can process the specified request. For example, `AFJSONRequestOperation` may check to make sure the content type was `application/json` or the URL path extension was `.json`.
+
+ @param urlRequest The request that is determined to be supported or not supported for this class.
+ */
++ (BOOL)canProcessRequest:(NSURLRequest *)urlRequest;
+
+///-----------------------------------------------------------
+/// @name Setting Completion Block Success / Failure Callbacks
+///-----------------------------------------------------------
+
+/**
+ Sets the `completionBlock` property with a block that executes either the specified success or failure block, depending on the state of the request on completion. If `error` returns a value, which can be caused by an unacceptable status code or content type, then `failure` is executed. Otherwise, `success` is executed.
+
+ This method should be overridden in subclasses in order to specify the response object passed into the success block.
+ 
+ @param success The block to be executed on the completion of a successful request. This block has no return value and takes two arguments: the receiver operation and the object constructed from the response data of the request.
+ @param failure The block to be executed on the completion of an unsuccessful request. This block has no return value and takes two arguments: the receiver operation and the error that occurred during the request.
+ */
+- (void)setCompletionBlockWithSuccess:(void (^)(AFHTTPRequestOperation *operation, id responseObject))success
+                              failure:(void (^)(AFHTTPRequestOperation *operation, NSError *error))failure;
+
+@end
+
+///----------------
+/// @name Functions
+///----------------
+
+/**
+ Returns a set of MIME types detected in an HTTP `Accept` or `Content-Type` header.
+ */
+extern NSSet * AFContentTypesFromHTTPHeader(NSString *string);
+