IRWebAPIKit/IRWebAPIResponseParser.m at develop · waveface/IRWebAPIKit · GitHub

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//
//  IRWebAPIResponseParser.m
//  IRWebAPIKit
//
//  Created by Evadne Wu on 1/29/11.
//  Copyright 2011 Iridia Productions. All rights reserved.
//

#import "IRWebAPIResponseParser.h"
#import "JSONKit.h"

NSDictionary * IRWebAPIResponseDictionarize (id<NSObject> incomingObject);

NSDictionary * IRWebAPIResponseDictionarize (id<NSObject> incomingObject) {

	if (!incomingObject)
		return (id)nil;

	if (![incomingObject isKindOfClass:[NSDictionary class]])
		return [NSDictionary dictionaryWithObject:incomingObject forKey:@"response"];

	return (id)incomingObject;

}


IRWebAPIResponseParser IRWebAPIResponseDefaultParserMake () {

//	Simply tucks the returned data into a dictionary

	NSDictionary * (^defaultParser) (NSData *) = ^ NSDictionary * (NSData *inData) {

		return [NSDictionary dictionaryWithObjectsAndKeys:

			inData, @"response",
			[[NSString alloc] initWithData:inData encoding:NSUTF8StringEncoding], @"responseText",

		nil];

	};

	return [defaultParser copy];

}


IRWebAPIResponseParser IRWebAPIResponseQueryResponseParserMake () {

	//	Parses UTF8 String Data Like:
	//
	//	Key=URL_Encoded_Value
	//	Another_Key=Another_Encoded_Value

	static IRWebAPIResponseParser parserBlock = nil;
	static dispatch_once_t onceToken;
	dispatch_once(&onceToken, ^{

		parserBlock = [^ NSDictionary * (NSData *inData) {

			NSString *responseString = [[NSString alloc] initWithData:inData encoding:NSUTF8StringEncoding];

			NSRegularExpression *expression = [NSRegularExpression regularExpressionWithPattern:@"([^=&\n\r]+)=([^=&\n\r]+)[\n\r&]?" options:NSRegularExpressionCaseInsensitive error:nil];

			NSMutableDictionary *returnedResponse = [NSMutableDictionary dictionary];

			@try {

				[expression enumerateMatchesInString:responseString options:0 range:NSMakeRange(0, [responseString length]) usingBlock: ^ (NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop) {

					[returnedResponse setObject:[responseString substringWithRange:[result rangeAtIndex:2]] forKey:[responseString substringWithRange:[result rangeAtIndex:1]]];

				}];

			} @catch (NSException * e) {

				NSLog(@"IRWebAPIResponseQueryResponseParser encountered an exception while parsing response.  Returning empty dictionary.");

				return [NSDictionary dictionary];

			}

			return returnedResponse;

		} copy];

	});

	return parserBlock;

}


IRWebAPIResponseParser IRWebAPIResponseDefaultJSONParserMake () {

	static IRWebAPIResponseParser parserBlock = nil;
	static dispatch_once_t onceToken;

	dispatch_once(&onceToken, ^{

		parserBlock = [^ (NSData *incomingData) {

      NSError *error = nil;
      // sometimes the response from cloud contains invalid utf-8 characters,
      // so we deserialize it with loosely restriction
      id results = [incomingData objectFromJSONDataWithParseOptions:JKParseOptionLooseUnicode error:&error];

      if (error && [incomingData length] != 0) {
        NSLog(@"Unable to parse JSON response, error:%@", error);
      }

			return IRWebAPIResponseDictionarize(results);

		} copy];

	});

	return parserBlock;

}