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The kernel for Yahoo API Request
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Eric (yu-wei) Chuang committed Sep 8, 2011
1 parent aa79f72 commit cccfe97
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34 changes: 34 additions & 0 deletions yahooOauth/yahooApi/YahooApi.h
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//
// YahooApi.h
// yahooOauth
//
// Created by ddsakura on 2011/8/30.
//

#import <Foundation/Foundation.h>

@protocol YahooApiDelegate <NSObject>
@optional

- (void)apiRequestStart;
- (void)apiRequestFinished:(NSArray *)responseData;

@end

@interface YahooApi : NSObject {

NSString *apiUrl;
NSString *apiParameter;

id <YahooApiDelegate> delegate;
}

@property (nonatomic, retain) NSString *apiUrl;
@property (nonatomic, retain) NSString *apiParameter;
@property (nonatomic, assign) id <YahooApiDelegate> delegate;

- (id)initWithApiUrl:(NSString*)theApiUrl withParameters:(NSString*)theApiParameter;
- (void)startRequest;
- (void)initAccessToken;

@end
279 changes: 279 additions & 0 deletions yahooOauth/yahooApi/YahooApi.m
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//
// YahooApi.m
// yahooOauth
//
// Created by ddsakura on 2011/8/30.
//

#import "YahooApi.h"
#import "ASIFormDataRequest.h"
#import "RegexKitLite.h"

#import <CommonCrypto/CommonHMAC.h>
#import "NSString+URLEncode.h"
#import "NSData+Base64.h"
#import "JSON.h"


static const NSString *oauth_consumer_key = @"dj0yJmk9MXVqNFVWZFdHa1JuJmQ9WVdrOU1GVXpaMEZ2TldjbWNHbzlORGczTXpneE5qWXkmcz1jb25zdW1lcnNlY3JldCZ4PWY1";
static const NSString *oauth_consumer_secret = @"dc6e6814dd61bf29bc70b8d6da05efade8941ed9";

static const NSString *oauthLogin = @"asbloguser2@yahoo.com";
static const NSString *oauthPasswd = @"test123";

static const NSString *urlGetAuthToken = @"https://login.yahoo.com/WSLogin/V1/get_auth_token";
static const NSString *urlGetToken = @"https://api.login.yahoo.com/oauth/v2/get_token";

@implementation YahooApi

@synthesize delegate;
@synthesize apiUrl, apiParameter;

- (NSString *)oauthGeneratePlaintextSignatureFor:(NSString *)baseString
withClientSecret:(NSString *)clientSecret
andTokenSecret:(NSString *)tokenSecret
{
// Construct the signature key
return [NSString stringWithFormat:@"%@&%@", clientSecret != nil ? [clientSecret encodeForURL] : @"", tokenSecret != nil ? [tokenSecret encodeForURL] : @""];
}

- (NSString *)oauthGenerateHMAC_SHA1SignatureFor:(NSString *)baseString
withClientSecret:(NSString *)clientSecret
andTokenSecret:(NSString *)tokenSecret
{

NSString *key = [self oauthGeneratePlaintextSignatureFor:baseString withClientSecret:clientSecret andTokenSecret:tokenSecret];

const char *keyBytes = [key cStringUsingEncoding:NSUTF8StringEncoding];
const char *baseStringBytes = [baseString cStringUsingEncoding:NSUTF8StringEncoding];
unsigned char digestBytes[CC_SHA1_DIGEST_LENGTH];

CCHmacContext ctx;
CCHmacInit(&ctx, kCCHmacAlgSHA1, keyBytes, strlen(keyBytes));
CCHmacUpdate(&ctx, baseStringBytes, strlen(baseStringBytes));
CCHmacFinal(&ctx, digestBytes);

NSData *digestData = [NSData dataWithBytes:digestBytes length:CC_SHA1_DIGEST_LENGTH];
return [digestData base64EncodedString];
}

#pragma mark - ASIHTTPRequest

- (void)requestFinished:(ASIHTTPRequest *)request
{

NSLog(@"requestFinished");
// Use when fetching text data
NSData *data = request.responseData;
NSString *response = [NSString stringWithCString:[data bytes] encoding:NSUTF8StringEncoding];
NSLog(@"%@",response);

if ([[request.userInfo valueForKey:@"type"] isEqualToString:@"PreApprovedRequestToken"]) {
//NSString
NSString *regEx = @"RequestToken=(.*)+";
NSString *match = [response stringByMatching:regEx];
if ([match isEqual:@""] == NO) {
NSString *requestToken = [match stringByReplacingOccurrencesOfRegex:@"RequestToken=" withString:@""];
NSLog(@"requestToken: %@", requestToken);

NSTimeInterval todaysDate = [[NSDate date] timeIntervalSince1970];
NSString *timeinNSString = [NSString stringWithFormat:@"%.0f", todaysDate];
NSLog(@"timeStamp: %@", timeinNSString);

NSString* escapedUrlString = [NSString stringWithFormat:@"%@&", oauth_consumer_secret];

NSLog(@"escapedUrlString: %@", escapedUrlString);

//
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"%@", urlGetToken]];
ASIFormDataRequest *getTokenRequest = [ASIFormDataRequest requestWithURL:url];
getTokenRequest.userInfo = [[NSMutableDictionary alloc] initWithObjectsAndKeys:@"getToken", @"type", nil];
[getTokenRequest setPostValue:[NSString stringWithFormat:@"%@", oauth_consumer_key] forKey:@"oauth_consumer_key"];
[getTokenRequest setPostValue:@"PLAINTEXT" forKey:@"oauth_signature_method"];
[getTokenRequest setPostValue:@"abcde" forKey:@"oauth_nonce"];
[getTokenRequest setPostValue:timeinNSString forKey:@"oauth_timestamp"];
[getTokenRequest setPostValue:escapedUrlString forKey:@"oauth_signature"];
[getTokenRequest setPostValue:@"oob" forKey:@"oauth_verifier"];
[getTokenRequest setPostValue:@"1.0" forKey:@"oauth_version"];
[getTokenRequest setPostValue:requestToken forKey:@"oauth_token"];
[getTokenRequest setDelegate:self];
[getTokenRequest startAsynchronous];


} else {
NSLog(@"Not found.");
}

}
else if ([[request.userInfo valueForKey:@"type"] isEqualToString:@"getToken"]) {

if (response != NULL) {
NSString *regEx = @"\\boauth_token=([a-zA-Z0-9%_.+\\-]+)&\\b";
NSString *oauthTokenSecretReg = @"\\boauth_token_secret=([a-zA-Z0-9%_.+\\-]+)&\\b";
NSString *match = [response stringByMatching:regEx];
NSString *match2 = [response stringByMatching:oauthTokenSecretReg];
NSLog(@"%@", match);
if ([match isEqual:@""] == NO) {

NSTimeInterval todaysDate = [[NSDate date] timeIntervalSince1970];
NSString *timeinNSString = [NSString stringWithFormat:@"%.0f", todaysDate];
NSLog(@"timeStamp: %@", timeinNSString);

NSString* escapedUrlString = [NSString stringWithFormat:@"%@&", oauth_consumer_secret];

NSLog(@"escapedUrlString: %@", escapedUrlString);

NSString *oauthToken = [match stringByReplacingOccurrencesOfRegex:@"oauth_token=" withString:@""];
oauthToken = [oauthToken stringByReplacingOccurrencesOfRegex:@"&" withString:@""];
NSLog(@"oauth_token: %@", oauthToken);

NSString *oauthSecrect = [match2 stringByReplacingOccurrencesOfRegex:@"oauth_token_secret=" withString:@""];
oauthSecrect = [oauthSecrect stringByReplacingOccurrencesOfRegex:@"&" withString:@""];
NSLog(@"oauthSecrect: %@", oauthSecrect);


NSString *baseUrl = self.apiUrl;

NSMutableDictionary *parameterDic = [NSMutableDictionary dictionaryWithObjects:
[NSArray arrayWithObjects:@"json", [NSString stringWithFormat:@"%@", oauth_consumer_key], timeinNSString, @"HMAC-SHA1", timeinNSString, oauthToken, @"1.0", nil]
forKeys:
[NSArray arrayWithObjects:@"format", @"oauth_consumer_key", @"oauth_nonce", @"oauth_signature_method", @"oauth_timestamp", @"oauth_token", @"oauth_version", nil]];


NSString *searchString = self.apiParameter;
NSString *regexString = @"((\\w+)\\=(\\w+))";
NSString *regexSpiltString = @"\\=";
NSArray *matchArray = NULL;

matchArray = [searchString componentsMatchedByRegex:regexString];
NSLog(@"matchArray: %@", matchArray);

for (NSString* pairPara in matchArray) {
NSArray *splitArray = NULL;
splitArray = [pairPara componentsSeparatedByRegex:regexSpiltString];
NSLog(@"splitArray: %@", splitArray);
[parameterDic setObject:[splitArray objectAtIndex:1] forKey:[splitArray objectAtIndex:0]];

}



NSArray *myKeys = [parameterDic allKeys];
NSArray *sortedKeys = [myKeys sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];

NSString *parameters = @"";

for (int k=0; k < [myKeys count]; k++) {
parameters = [NSString stringWithFormat:@"%@%@=%@", [parameters isEqualToString:@""]?[NSString stringWithFormat:@""]:[NSString stringWithFormat:@"%@&", parameters] , [sortedKeys objectAtIndex:k],[parameterDic objectForKey: [sortedKeys objectAtIndex:k]]];
}

NSLog(@"kkkk: %@", parameters);

NSString *parameter = [NSString stringWithFormat:@"%@&format=json&oauth_consumer_key=%@&oauth_nonce=%@&oauth_signature_method=HMAC-SHA1&oauth_timestamp=%@&oauth_token=%@&oauth_version=1.0", self.apiParameter, [NSString stringWithFormat:@"%@", oauth_consumer_key], timeinNSString, timeinNSString, oauthToken];


NSString *urlencodebaseUrl = [baseUrl encodeForURL];

NSString *urlencodeParameter = [parameters encodeForURL];

NSString *baseData = [NSString stringWithFormat:@"GET&%@&%@", urlencodebaseUrl, urlencodeParameter];
NSString *encodeBaseData = [[self oauthGenerateHMAC_SHA1SignatureFor:baseData withClientSecret:[NSString stringWithFormat:@"%@", oauth_consumer_secret] andTokenSecret:oauthSecrect] encodeForURL];


NSLog(@"baseUrl: GET&%@", baseUrl);
NSLog(@"baseData: %@", baseData);
NSLog(@"encodeBaseData: %@", encodeBaseData);


//NSURL *url = [NSURL URLWithString:@"http://wretch.yahooapis.com/v1.2/siteAlbumCategories?format=json"];
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"%@?format=json&%@", baseUrl, self.apiParameter]];
ASIHTTPRequest *apiRequest = [ASIHTTPRequest requestWithURL:url];
apiRequest.userInfo = [[NSMutableDictionary alloc] initWithObjectsAndKeys:@"accessApi", @"type", nil];

NSString *oauthValue = [NSString stringWithFormat:@"OAuth realm=\"yahooapis.com\", oauth_consumer_key=\"%@\", oauth_nonce=\"%@\", oauth_signature_method=\"HMAC-SHA1\", oauth_timestamp=\"%@\", oauth_token=\"%@\", oauth_version=\"1.0\", oauth_signature=\"%@\"", [NSString stringWithFormat:@"%@", oauth_consumer_key], timeinNSString, timeinNSString, oauthToken, encodeBaseData];

NSLog(@"%@", oauthValue);

[apiRequest addRequestHeader:@"Authorization" value:oauthValue];
[apiRequest setDelegate:self];
[apiRequest startAsynchronous];
/*NSError *error = [apiRequest error];
if (!error) {
NSString *response = [apiRequest responseString];
NSLog(@"%@", response);
}
else
{
NSLog(@"%@", [error description]);
}*/

}
}
else
{
[self initAccessToken];

}


}
else if ([[request.userInfo valueForKey:@"type"] isEqualToString:@"accessApi"]) {
NSArray *jsonDict = [response JSONValue];

[[self delegate] apiRequestFinished:jsonDict];
//NSLog(@"%@", jsonDict);

}
}

- (void)initAccessToken
{
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"%@", urlGetAuthToken]];
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
request.userInfo = [[NSMutableDictionary alloc] initWithObjectsAndKeys:@"PreApprovedRequestToken", @"type", nil];
[request setPostValue:[NSString stringWithFormat:@"%@", oauth_consumer_key] forKey:@"oauth_consumer_key"];
[request setPostValue:[NSString stringWithFormat:@"%@", oauthLogin] forKey:@"login"];
[request setPostValue:[NSString stringWithFormat:@"%@", oauthPasswd] forKey:@"passwd"];
[request setDelegate:self];
[request startAsynchronous];

}

- (id)initWithApiUrl:(NSString*)theApiUrl withParameters:(NSString*)theApiParameter
{
self = [self init];
if (self) {
[self setApiUrl:theApiUrl];
[self setApiParameter:theApiParameter];
}

return self;
}

-(void)startRequest
{
[[self delegate] apiRequestStart];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if (![defaults objectForKey:@"oauth_token"]) {
//Call init get access token
NSLog(@"Call init get access token");
[self initAccessToken];
}
else {

//Call Refresh access token
NSLog(@"Call Refresh access token");
/*NSString *oauth_token = [defaults objectForKey:@"oauth_token"];
NSString *oauth_token_secret = [defaults objectForKey:@"oauth_token_secret"];
NSString *oauth_session_handle = [defaults objectForKey:@"oauth_session_handle"];*/
}

/*
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:@"" forKey:@"FBAccessTokenKey"];
[defaults setObject:@"" forKey:@"FBExpirationDateKey"];
[defaults synchronize];*/
}


@end

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