使用DotNetOpenAuth访问Yelp的OAuth 1.0a API [英] Accessing Yelp's OAuth 1.0a API with DotNetOpenAuth

问题描述

有人使用DotNetOpenAuth成功使用DotNetOpenAuth来访问 Yelp的v2 api 吗？

Has anyone had success using DotNetOpenAuth to access Yelp's v2 api using DotNetOpenAuth?

在仔细阅读示例和源代码之后，我得出了以下结论：

After digging through the examples and the source, this is what I came up with:

public class YelpConnector
{               
    private static readonly string YelpConsumerKey = ConfigurationManager.AppSettings["YelpConsumerKey"];
    private static readonly string YelpConsumerSecret = ConfigurationManager.AppSettings["YelpConsumerSecret"];
    private static readonly string YelpToken = ConfigurationManager.AppSettings["YelpToken"];
    private static readonly string YelpTokenSecret = ConfigurationManager.AppSettings["YelpTokenSecret"];
    private static readonly InMemoryTokenManager tokenManager = new InMemoryTokenManager(YelpConsumerKey, YelpConsumerSecret, YelpToken, YelpTokenSecret);
    private static readonly Uri YelpURLBase = new Uri("http://api.yelp.com/v2/");        
    private static readonly ServiceProviderDescription YelpServiceDescription = new ServiceProviderDescription {
        RequestTokenEndpoint = null,
        UserAuthorizationEndpoint = null,
        AccessTokenEndpoint = null,
        TamperProtectionElements = new ITamperProtectionChannelBindingElement[] { new HmacSha1SigningBindingElement() },
    };

    private static dynamic SearchBase(string queryString)
    {
        if (string.IsNullOrEmpty(queryString))
            throw new ArgumentNullException();
        var searchEndpoint = new MessageReceivingEndpoint(new Uri(YelpURLBase, "search?" + queryString), HttpDeliveryMethods.GetRequest | HttpDeliveryMethods.AuthorizationHeaderRequest);
        var consumer = new WebConsumer(YelpServiceDescription, tokenManager);
        try
        {
            using (IncomingWebResponse response = consumer.PrepareAuthorizedRequestAndSend(searchEndpoint, YelpToken))
            {
                string rs = response.GetResponseReader().ReadToEnd();
                dynamic js = SimpleJson.SimpleJson.DeserializeObject(rs);
                return js;
            }
        }
        catch (Exception e)
        {
            ErrorSignal.FromCurrentContext().Raise(e);
            return null;
        }            
    }
    internal class InMemoryTokenManager : IConsumerTokenManager
    {
        private Dictionary<string, string> tokensAndSecrets = new Dictionary<string, string>();

        public InMemoryTokenManager(string consumerKey, string consumerSecret, string token, string secret)
        {
            if (String.IsNullOrEmpty(consumerKey))
            {
                throw new ArgumentNullException("consumerKey");
            }
            this.tokensAndSecrets[token] = secret;
            this.ConsumerKey = consumerKey;
            this.ConsumerSecret = consumerSecret;
        }

        public string ConsumerKey { get; private set; }

        public string ConsumerSecret { get; private set; }

        public string GetTokenSecret(string token)
        {
            return this.tokensAndSecrets[token];
        }

        public void StoreNewRequestToken(UnauthorizedTokenRequest request, ITokenSecretContainingMessage response)
        {
            this.tokensAndSecrets[response.Token] = response.TokenSecret;
        }

        public void ExpireRequestTokenAndStoreNewAccessToken(string consumerKey, string requestToken, string accessToken, string accessTokenSecret)
        {
            this.tokensAndSecrets.Remove(requestToken);
            this.tokensAndSecrets[accessToken] = accessTokenSecret;
        }

        public TokenType GetTokenType(string token)
        {
            throw new NotImplementedException();
        }           
    }
 }

如果我通过以下内容QueryString limit = 5& category_filter = movietheaters，bars，cafe，museums，danceclubs，parks≪ == 37.78364455，-122.464104 ，我收到一个异常消息：前提条件失败：值！= null，并且堆栈跟踪为：

If I pass in the following QueryString limit=5&category_filter=movietheaters,bars,cafe,museums,danceclubs,parks&ll=37.78364455,-122.464104, I get an exception saying "Precondition failed.: value != null" and a stacktrace of:

at System.Diagnostics.Contracts.__ContractsRuntime.Requires[TException](Boolean condition, String message, String conditionText)
at DotNetOpenAuth.Messaging.MessagingUtilities.EscapeUriDataStringRfc3986(String value)
at DotNetOpenAuth.OAuth.ChannelElements.SigningBindingElementBase.ConstructSignatureBaseString(ITamperResistantOAuthMessage message, MessageDictionary messageDictionary)
at DotNetOpenAuth.OAuth.ChannelElements.HmacSha1SigningBindingElement.GetSignature(ITamperResistantOAuthMessage message)
at DotNetOpenAuth.OAuth.ChannelElements.SigningBindingElementBase.ProcessOutgoingMessage(IProtocolMessage message)
at DotNetOpenAuth.OAuth.ChannelElements.SigningBindingElementChain.ProcessOutgoingMessage(IProtocolMessage message)
at DotNetOpenAuth.Messaging.Channel.ProcessOutgoingMessage(IProtocolMessage message)
at DotNetOpenAuth.OAuth.ChannelElements.OAuthChannel.InitializeRequest(IDirectedProtocolMessage request)
at DotNetOpenAuth.OAuth.ConsumerBase.PrepareAuthorizedRequestAndSend(MessageReceivingEndpoint endpoint, String accessToken)
at MeetPpl.Helpers.SocialConnectors.YelpConnector.SearchBase(String queryString)

有什么建议吗？我是在正确的道路上吗？

Any suggestions? Am I on the right trail?

推荐答案

在放弃dotnetopenauth之前，我整整一天都在苦苦挣扎。我发现了一种非常简单的方法，可以使用 http://www.twitterizer.net/ 的oauth库搜索yelp。 。只需下载twitterizer的精简版并在下面使用我的示例代码即可。

I struggled with this issue for 1 whole day before giving up on dotnetopenauth. I found a very simple way to search yelp using the oauth library of http://www.twitterizer.net/ . Simply download the lite version of twitterizer and use my sample code below.

下载链接为 http://www.twitterizer.net/files/Twitterizer2lite-2.3.2.zip

    public static string search()
    {
        string yelpSearchURL = "http://api.yelp.com/v2/search?term=food&location=San+Francisco";
        string yelpConsumerKey = "your key";
        string yelpConsumerSecret = "your secret";
        string yelpRequestToken = "your token";
        string yelpRequestTokenSecret = "your token secret";

        Twitterizer.OAuthTokens ot = new Twitterizer.OAuthTokens();
        ot.AccessToken = yelpRequestToken;
        ot.AccessTokenSecret = yelpRequestTokenSecret;
        ot.ConsumerKey = yelpConsumerKey;
        ot.ConsumerSecret = yelpConsumerSecret;

        string formattedUri = String.Format(CultureInfo.InvariantCulture,
                             yelpSearchURL, "");
        Uri url = new Uri(formattedUri);
        Twitterizer.WebRequestBuilder wb = new Twitterizer.WebRequestBuilder(url, Twitterizer.HTTPVerb.GET, ot);
        System.Net.HttpWebResponse wr = wb.ExecuteRequest();
        StreamReader sr = new StreamReader(wr.GetResponseStream());
        return sr.ReadToEnd();
    }

这篇关于使用DotNetOpenAuth访问Yelp的OAuth 1.0a API的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！