wordpress 网站搬家,织梦网站搬家工具,登封做网站推广,dwcc网页制作教程在现阶段饮食类的APP发展的非常迅猛#xff0c;尤其在校园中#xff0c;学生只需要凭借一个手机就能买到自己想要的食物#xff0c;真正做到了足不出户。可是如果我们想独立完成一个app就需要有相应的数据支持#xff0c;这里给大家介绍一个国外的开发API, FatSecret Platf… 在现阶段饮食类的APP发展的非常迅猛尤其在校园中学生只需要凭借一个手机就能买到自己想要的食物真正做到了足不出户。可是如果我们想独立完成一个app就需要有相应的数据支持这里给大家介绍一个国外的开发API, FatSecret Platform API,这里面包含了许多的食物信息。我们根据这些信息就能够请求我们的数据进行独立的app开发。 1、api地址 http://platform.fatsecret.com/api/Default.aspx?screenrapih 2、Authentication 认证 这里要注意Authentication是难点也是重点下面我们一起研究研究怎么进行认证。 Note that you must be signed up as a developer, and agree to our Terms of Service in order to obtain you Consumer Key andShared Secret, which youll need to send requests to the REST API. Api中提到如果我们需要使用api必须首先注册为开发者并且获取到Consumer Key andShared Secret这两个东西。好既然这样我们就开始获取,按照网站注册后如会获取如下数据 有了这个东西我们就可以进行下一步了。继续浏览API的Authentication 看到这我们会发现想要请求api必须还得获取一个signature ,而且上面给我们提供了步骤。好那我们就接着往下看 Step 1. Creating a Signature Base String 意思就是说我们需要将字段和方法按照顺序拼接出下面的形式其中的转码我们用的是RFC3986 POST http%3A%2F%2Fplatform.fatsecret.com%2Frest%2Fserver.api a%3Dbar%26%26oauth_consumer_key%3Ddemo%26oauth_nonce%3Dabc%26oauth_signature_method%3DHMAC-SHA1%26oauth_timestamp%3D12345678%26oauth_version%3D1.0%26z%3Dbar Step 2. Calculating the Signature value (oauth_signature) 意思是说需要进一步RFC2104和RFC2045和RFC3986进行转码 Step 3. Sending the Request Send all the parameters used to generate the Signature Base String via the HTTP method specified in the Signature Base String, with the inclusion of the oauth_signature. Thats it! We will hopefully be able to generate the same oauth_signature from our end and confirm that it is indeed you 好看到这里大家肯定有些模糊没关系我们有代码帮助大家理解上面的api步骤我通过代码翻译如下 /*** #Description#** param url 请求的地址* param method 请求的方法* param body body数据* param _oAuthConsumerKey 申请的key* param _oAuthConsumerSecret 申请的Secret* param _oAuthToken 暂时用不到* param _oAuthTokenSecret 暂时用不到** return #return value description#*/
NSString *OAuthorizationHeader(NSURL *url, NSString *method, NSData *body, NSString *_oAuthConsumerKey, NSString *_oAuthConsumerSecret, NSString *_oAuthToken, NSString *_oAuthTokenSecret)
{NSString *_oAuthNonce [NSString ab_GUID];NSString *_oAuthTimestamp [NSString stringWithFormat:%d, (int)[[NSDate date] timeIntervalSince1970]];NSString *_oAuthSignatureMethod HMAC-SHA1;NSString *_oAuthVersion 1.0;NSMutableDictionary *oAuthAuthorizationParameters [NSMutableDictionary dictionary];[oAuthAuthorizationParameters setObject:_oAuthNonce forKey:oauth_nonce];[oAuthAuthorizationParameters setObject:_oAuthTimestamp forKey:oauth_timestamp];[oAuthAuthorizationParameters setObject:_oAuthSignatureMethod forKey:oauth_signature_method];[oAuthAuthorizationParameters setObject:_oAuthVersion forKey:oauth_version];[oAuthAuthorizationParameters setObject:_oAuthConsumerKey forKey:oauth_consumer_key];if(_oAuthToken)[oAuthAuthorizationParameters setObject:_oAuthToken forKey:oauth_token];// get query and body parametersNSDictionary *additionalQueryParameters [NSURL ab_parseURLQueryString:[url query]];NSDictionary *additionalBodyParameters nil;if(body) {NSString *string [[NSString alloc] initWithData:body encoding:NSUTF8StringEncoding];if(string) {additionalBodyParameters [NSURL ab_parseURLQueryString:string];}}// combine all parametersNSMutableDictionary *parameters [oAuthAuthorizationParameters mutableCopy];if(additionalQueryParameters) [parameters addEntriesFromDictionary:additionalQueryParameters];if(additionalBodyParameters) [parameters addEntriesFromDictionary:additionalBodyParameters];// - UTF-8 - RFC3986NSMutableDictionary *encodedParameters [NSMutableDictionary dictionary];for(NSString *key in parameters) {NSString *value [parameters objectForKey:key];[encodedParameters setObject:[value ab_RFC3986EncodedString] forKey:[key ab_RFC3986EncodedString]];}NSArray *sortedKeys [[encodedParameters allKeys] sortedArrayUsingFunction:SortParameter context:(__bridge void *)(encodedParameters)];NSMutableArray *parameterArray [NSMutableArray array];for(NSString *key in sortedKeys) {[parameterArray addObject:[NSString stringWithFormat:%%, key, [encodedParameters objectForKey:key]]];}NSString *normalizedParameterString [parameterArray componentsJoinedByString:];NSString *normalizedURLString;if ([url port] nil) {normalizedURLString [NSString stringWithFormat:%://%%, [url scheme], [url host], [url path]];} else {normalizedURLString [NSString stringWithFormat:%://%:%%, [url scheme], [url host], [url port], [url path]];}NSString *signatureBaseString [NSString stringWithFormat:%%%,[method ab_RFC3986EncodedString],[normalizedURLString ab_RFC3986EncodedString],[normalizedParameterString ab_RFC3986EncodedString]];NSString *key [NSString stringWithFormat:%%,[_oAuthConsumerSecret ab_RFC3986EncodedString],[_oAuthTokenSecret ab_RFC3986EncodedString]];NSData *signature HMAC_SHA1(signatureBaseString, key);NSString *base64Signature [signature base64EncodedString];// PARKER CHANGE: changed oAuthAuthorizationParameters to parametersNSMutableDictionary *authorizationHeaderDictionary [parameters mutableCopy];[authorizationHeaderDictionary setObject:base64Signature forKey:oauth_signature];NSMutableArray *authorizationHeaderItems [NSMutableArray array];for(NSString *key in authorizationHeaderDictionary) {NSString *value [authorizationHeaderDictionary objectForKey:key];// PARKER CHANGE: removed quotes that surrounded each value[authorizationHeaderItems addObject:[NSString stringWithFormat:%%,[key ab_RFC3986EncodedString],[value ab_RFC3986EncodedString]]];}// PARKER CHANGE: changed concatentation string from , to NSString *authorizationHeaderString [authorizationHeaderItems componentsJoinedByString:];
// authorizationHeaderString [NSString stringWithFormat:OAuth %, authorizationHeaderString];return authorizationHeaderString;
} 使用方法如下 #pragma mark - 请求方法
-(void) connentSign{//设置食物IDNSDictionary *params {food_id : 33690};//设置请求参数和方法名[self makeRequestWithMethod:food.get parameters:params completion:^(NSDictionary *data) {}];}//开始发送请求
- (void) makeRequestWithMethod:(NSString *)methodparameters:(NSDictionary *)paramscompletion:(void (^)(NSDictionary *data))completionBlock {NSMutableDictionary *parameters [params mutableCopy];[parameters addEntriesFromDictionary:[self defaultParameters]];[parameters addEntriesFromDictionary:{ method : method }];NSString *queryString [self queryStringFromDictionary:parameters];NSData *data [NSData dataWithBytes:[queryString UTF8String] length:queryString.length];NSString *authHeader OAuthorizationHeader([NSURL URLWithString:FAT_SECRET_API_ENDPOINT],GET,data,9921d3f511a542a8b32b8841bb1d62ed,f8fa1d96494046c69159099ab153ea1e,nil,);[self.manager GET:[FAT_SECRET_API_ENDPOINT stringByAppendingFormat:?%, authHeader] parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {NSLog(%,responseObject);} failure:^(AFHTTPRequestOperation *operation, NSError *error) {}];}- (NSDictionary *) defaultParameters {return { format: json };
}- (NSString *) queryStringFromDictionary:(NSDictionary *)dict {NSMutableArray *entries [[] mutableCopy];for (NSString *key in dict) {NSString *value [dict objectForKey:key];[entries addObject:[NSString stringWithFormat:%%, key, value]];}return [entries componentsJoinedByString:];
} 然后我们就可以Happy programming! 想要了解更多内容的小伙伴可以点击查看源码亲自运行测试。 疑问咨询或技术交流请加入官方QQ群 452379712 作者 杰瑞教育 出处 http://www.cnblogs.com/jerehedu/ 本文版权归烟台杰瑞教育科技有限公司和博客园共有欢迎转载但未经作者同意必须保留此段声明且在文章页面明显位置给出原文连接否则保留追究法律责任的权利。 转载于:https://www.cnblogs.com/jerehedu/p/4710518.html
