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C# Swagger generated client how to authenticate and use autogenerated code

I have sucessfully generated classes from Swagger Definition (Openapi 3.0.3) using nSwag Studio, but I have no idea how to properly use this as a client.
Manually RestSharp code works fine, but I'd like to use autogenerated code to consume webservice methods and can't do it properly
This is working fine:
string clientId = "dev";
string clientSecret = #"pass";
var client = new RestClient("http://192.168.1.10/xyz/api/oauth/token");
var request = new RestRequest(Method.POST);
request.AddHeader("cache-control", "no-cache");
request.AddHeader("content-type", "application/x-www-form-urlencoded");
request.AddHeader("grant_type", "client_credentials");
var credentials = string.Format("{0}:{1}", clientId, clientSecret);
var headerValue = Convert.ToBase64String(Encoding.UTF8.GetBytes(credentials));
request.AddHeader("Authorization", $"Basic {headerValue}");
request.AddParameter($"application/x-www-form-urlencoded", $"grant_type=client_credentials&client_id={clientId}&client_secret{clientSecret}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request, Method.POST);
My try with autogenerated code. My apoligizes if its wrong, but can't find any example.
There's just few examples but looks like client is generated in a different way (client initialization with base url - but still no idea about basic authorization in this context)
Googling returns mostly "How to create server side" or add swagger to asp/mvc/webapi project.
string URL = #"http://192.168.1.10/xyz/api";
string clientId = "dev";
string clientSecret = #"pass";
IO.Swagger.Client.ApiClient client = new IO.Swagger.Client.ApiClient(URL);
IO.Swagger.Client.Configuration.DefaultApiClient = client; //<<this throws error
IO.Swagger.Client.Configuration.Username = clientId;
IO.Swagger.Client.Configuration.Password = clientSecret;
client.AddDefaultHeader("Authorization", "bearer TOKEN");
IO.Swagger.Api.AuthApi authApi = new IO.Swagger.Api.AuthApi(client);
Error in ApiClient class
public ApiClient(String basePath="/xyz/api")
{
BasePath = basePath;
RestClient = new RestClient(BasePath); //System.UriFormatException: 'Invalid URI: The format of the URI could not be determined.'
}
I have tried many string forms of url (class doesn't accept Uri explictly)
Configuration
using System;
using System.Reflection;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
namespace IO.Swagger.Client
{
public class Configuration
{
public const string Version = "1.0.0";
public static ApiClient DefaultApiClient = new ApiClient();
public static String Username { get; set; }
public static String Password { get; set; }
public static Dictionary<String, String> ApiKey = new Dictionary<String, String>();
public static Dictionary<String, String> ApiKeyPrefix = new Dictionary<String, String>();
private static string _tempFolderPath = Path.GetTempPath();
public static String TempFolderPath
{
get { return _tempFolderPath; }
set
{
if (String.IsNullOrEmpty(value))
{
_tempFolderPath = value;
return;
}
// create the directory if it does not exist
if (!Directory.Exists(value))
Directory.CreateDirectory(value);
// check if the path contains directory separator at the end
if (value[value.Length - 1] == Path.DirectorySeparatorChar)
_tempFolderPath = value;
else
_tempFolderPath = value + Path.DirectorySeparatorChar;
}
}
private const string ISO8601_DATETIME_FORMAT = "o";
private static string _dateTimeFormat = ISO8601_DATETIME_FORMAT;
public static String DateTimeFormat
{
get
{
return _dateTimeFormat;
}
set
{
if (string.IsNullOrEmpty(value))
{
// Never allow a blank or null string, go back to the default
_dateTimeFormat = ISO8601_DATETIME_FORMAT;
return;
}
// Caution, no validation when you choose date time format other than ISO 8601
// Take a look at the above links
_dateTimeFormat = value;
}
}
public static String ToDebugReport()
{
String report = "C# SDK (IO.Swagger) Debug Report:\n";
report += " OS: " + Environment.OSVersion + "\n";
report += " .NET Framework Version: " + Assembly
.GetExecutingAssembly()
.GetReferencedAssemblies()
.Where(x => x.Name == "System.Core").First().Version.ToString() + "\n";
report += " Version of the API: 2.0.1\n";
report += " SDK Package Version: 1.0.0\n";
return report;
}
}
}
Client
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Text.RegularExpressions;
using System.IO;
using System.Web;
using System.Linq;
using System.Net;
using System.Text;
using Newtonsoft.Json;
using RestSharp;
using RestSharp.Extensions;
namespace IO.Swagger.Client
{
public class ApiClient
{
private readonly Dictionary<String, String> _defaultHeaderMap = new Dictionary<String, String>();
public ApiClient(String basePath="/xyz/api")
{
BasePath = basePath;
RestClient = new RestClient(BasePath);
}
public string BasePath { get; set; }
public RestClient RestClient { get; set; }
public Dictionary<String, String> DefaultHeader
{
get { return _defaultHeaderMap; }
}
public Object CallApi(String path, RestSharp.Method method, Dictionary<String, String> queryParams, String postBody,
Dictionary<String, String> headerParams, Dictionary<String, String> formParams,
Dictionary<String, FileParameter> fileParams, String[] authSettings)
{
var request = new RestRequest(path, method);
UpdateParamsForAuth(queryParams, headerParams, authSettings);
// add default header, if any
foreach(var defaultHeader in _defaultHeaderMap)
request.AddHeader(defaultHeader.Key, defaultHeader.Value);
// add header parameter, if any
foreach(var param in headerParams)
request.AddHeader(param.Key, param.Value);
// add query parameter, if any
foreach(var param in queryParams)
request.AddParameter(param.Key, param.Value, ParameterType.GetOrPost);
// add form parameter, if any
foreach(var param in formParams)
request.AddParameter(param.Key, param.Value, ParameterType.GetOrPost);
// add file parameter, if any
foreach(var param in fileParams)
request.AddFile(param.Value.Name, param.Value.Writer, param.Value.FileName, param.Value.ContentType);
if (postBody != null) // http body (model) parameter
request.AddParameter("application/json", postBody, ParameterType.RequestBody);
return (Object)RestClient.Execute(request);
}
public void AddDefaultHeader(string key, string value)
{
_defaultHeaderMap.Add(key, value);
}
public string EscapeString(string str)
{
return RestSharp.Contrib.HttpUtility.UrlEncode(str);
}
public FileParameter ParameterToFile(string name, Stream stream)
{
if (stream is FileStream)
return FileParameter.Create(name, stream.ReadAsBytes(), Path.GetFileName(((FileStream)stream).Name));
else
return FileParameter.Create(name, stream.ReadAsBytes(), "no_file_name_provided");
}
public string ParameterToString(object obj)
{
if (obj is DateTime)
// Return a formatted date string - Can be customized with Configuration.DateTimeFormat
// Defaults to an ISO 8601, using the known as a Round-trip date/time pattern ("o")
// https://msdn.microsoft.com/en-us/library/az4se3k1(v=vs.110).aspx#Anchor_8
// For example: 2009-06-15T13:45:30.0000000
return ((DateTime)obj).ToString (Configuration.DateTimeFormat);
else if (obj is List<string>)
return String.Join(",", (obj as List<string>).ToArray());
else
return Convert.ToString (obj);
}
public object Deserialize(string content, Type type, IList<Parameter> headers=null)
{
if (type == typeof(Object)) // return an object
{
return content;
}
if (type == typeof(Stream))
{
var filePath = String.IsNullOrEmpty(Configuration.TempFolderPath)
? Path.GetTempPath()
: Configuration.TempFolderPath;
var fileName = filePath + Guid.NewGuid();
if (headers != null)
{
var regex = new Regex(#"Content-Disposition:.*filename=['""]?([^'""\s]+)['""]?$");
var match = regex.Match(headers.ToString());
if (match.Success)
fileName = filePath + match.Value.Replace("\"", "").Replace("'", "");
}
File.WriteAllText(fileName, content);
return new FileStream(fileName, FileMode.Open);
}
if (type.Name.StartsWith("System.Nullable`1[[System.DateTime")) // return a datetime object
{
return DateTime.Parse(content, null, System.Globalization.DateTimeStyles.RoundtripKind);
}
if (type == typeof(String) || type.Name.StartsWith("System.Nullable")) // return primitive type
{
return ConvertType(content, type);
}
// at this point, it must be a model (json)
try
{
return JsonConvert.DeserializeObject(content, type);
}
catch (IOException e)
{
throw new ApiException(500, e.Message);
}
}
public string Serialize(object obj)
{
try
{
return obj != null ? JsonConvert.SerializeObject(obj) : null;
}
catch (Exception e)
{
throw new ApiException(500, e.Message);
}
}
public string GetApiKeyWithPrefix (string apiKeyIdentifier)
{
var apiKeyValue = "";
Configuration.ApiKey.TryGetValue (apiKeyIdentifier, out apiKeyValue);
var apiKeyPrefix = "";
if (Configuration.ApiKeyPrefix.TryGetValue (apiKeyIdentifier, out apiKeyPrefix))
return apiKeyPrefix + " " + apiKeyValue;
else
return apiKeyValue;
}
public void UpdateParamsForAuth(Dictionary<String, String> queryParams, Dictionary<String, String> headerParams, string[] authSettings)
{
if (authSettings == null || authSettings.Length == 0)
return;
foreach (string auth in authSettings)
{
// determine which one to use
switch(auth)
{
case "BasicAuth":
headerParams["Authorization"] = "Basic " + Base64Encode(Configuration.Username + ":" + Configuration.Password);
break;
case "BearerAuth":
break;
default:
//TODO show warning about security definition not found
break;
}
}
}
public static string Base64Encode(string text)
{
var textByte = System.Text.Encoding.UTF8.GetBytes(text);
return System.Convert.ToBase64String(textByte);
}
public static Object ConvertType(Object fromObject, Type toObject) {
return Convert.ChangeType(fromObject, toObject);
}
}
}
AuthApi
using System;
using System.Collections.Generic;
using RestSharp;
using IO.Swagger.Client;
using IO.Swagger.Model;
namespace IO.Swagger.Api
{
public interface IAuthApi
{
InlineResponse200 OauthTokenPost (string grantType);
}
public class AuthApi : IAuthApi
{
public AuthApi(ApiClient apiClient = null)
{
if (apiClient == null) // use the default one in Configuration
this.ApiClient = Configuration.DefaultApiClient;
else
this.ApiClient = apiClient;
}
public AuthApi(String basePath)
{
this.ApiClient = new ApiClient(basePath);
}
public void SetBasePath(String basePath)
{
this.ApiClient.BasePath = basePath;
}
public String GetBasePath(String basePath)
{
return this.ApiClient.BasePath;
}
public ApiClient ApiClient {get; set;}
public InlineResponse200 OauthTokenPost (string grantType)
{
var path = "/oauth/token";
path = path.Replace("{format}", "json");
var queryParams = new Dictionary<String, String>();
var headerParams = new Dictionary<String, String>();
var formParams = new Dictionary<String, String>();
var fileParams = new Dictionary<String, FileParameter>();
String postBody = null;
if (grantType != null) formParams.Add("grant_type", ApiClient.ParameterToString(grantType)); // form parameter
// authentication setting, if any
String[] authSettings = new String[] { "BasicAuth" };
// make the HTTP request
IRestResponse response = (IRestResponse) ApiClient.CallApi(path, Method.POST, queryParams, postBody, headerParams, formParams, fileParams, authSettings);
if (((int)response.StatusCode) >= 400)
throw new ApiException ((int)response.StatusCode, "Error calling OauthTokenPost: " + response.Content, response.Content);
else if (((int)response.StatusCode) == 0)
throw new ApiException ((int)response.StatusCode, "Error calling OauthTokenPost: " + response.ErrorMessage, response.ErrorMessage);
return (InlineResponse200) ApiClient.Deserialize(response.Content, typeof(InlineResponse200), response.Headers);
}
}
}

I am under impression that your main problem is Uri formating. I would suggest finding the exact problem by doing
string URL = #"http://192.168.1.10/xyz/api";
Uri baseAddress = new Uri(URL);
string clientId = "dev";
string clientSecret = #"pass";
IO.Swagger.Client.ApiClient client = new IO.Swagger.Client.ApiClient(baseAddress.ToString());
IO.Swagger.Client.Configuration.DefaultApiClient = client; //<<this throws error
IO.Swagger.Client.Configuration.Username = clientId;
IO.Swagger.Client.Configuration.Password = clientSecret;
client.AddDefaultHeader("Authorization", "bearer TOKEN");
IO.Swagger.Api.AuthApi authApi = new IO.Swagger.Api.AuthApi(client);

Get Ienumrable type response from Genric Handler in MVC

I am using a genric handler. Its returning the Ienumerable type Data but when i am getting the response from Handler i am unable to get . It gives an error when i am going to perform any operation on that data. I think i am not taking the response in a proper way. Any kind of help will be appreciated.
Here is my Handler.
public class Handler1 : IHttpHandler
{
IUserInfosRepository _userRepo;
public Handler1()
{
this._userRepo = new UserInfosRepository();
}
public void ProcessRequest(HttpContext context)
{
var Suppliers = GetData(Convert.ToInt32(context.Request.QueryString["Active"].ToString()), Convert.ToInt32(context.Request.QueryString["Inactive"].ToString()));
//string name = context.Request.QueryString["name"];
context.Response.Write(Suppliers);
}
public bool IsReusable
{
get
{
return false;
}
}
public IEnumerable<UserInfoModel> GetData(int Active , int InactiveStatus)
{
var objUI = _userRepo.GetAllMembersWithDelete(Active, Active);
return objUI;
}
}
Here is my controller as i am using MVC
string HandlerUrl = "http://localhost:8897/Handler1.ashx?Active=" + Status.Active + "&Inactive=" + Status.Inactive + "";
var response = (new WebClient()).DownloadString(HandlerUrl);
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://localhost:8897/Handler1.ashx?Active=" + Status.Active + "&Inactive=" + Status.Inactive + "");
HttpWebResponse response1 = (HttpWebResponse)request.GetResponse();
var SearchDate = response.Where(x => x.LastLogin != null).GroupBy(x => x.LastLogin.Value.Date).OrderByDescending(x => x.Key).Select(x => new { LastLogin = string.Format("{0:MM/dd/yyyy}", x.Key) }).ToList();

WCF service without adding reference in WPF

I created a WCF consuming application in WPF by adding service reference.Now its working fine.But now i have a new requirement that is, i want to call the service dynamically by entering the URL,username and password.

You can create a WCF client without adding a service reference with the use of ClientBase, but you will still need a reference to the interface for the compiler to knowwhat functions to call.
It works like this:
public class ServiceClient : System.ServiceModel.ClientBase<IService>, IService {
public ServiceClient() {
}
public ServiceClient(System.ServiceModel.Channels.Binding binding, System.ServiceModel.EndpointAddress remoteAddress) :
base(binding, remoteAddress) {
}
public void Login(string user, string password) {
return base.Channel.Login(user, password);
}
}
NetNamedPipeBinding binding = new NetNamedPipeBinding();
binding.TransactionFlow = true;
EndpointAddress address = new EndpointAddress(youraddress);
ServiceClient client = new ServiceClient(binding, address);
client.Login("xxx", "yyy");

See this website for a general idea. Create a new VisualStudio Solution and add a WCF Service Application project and an Unit Test Project. Put the following code in the test project (a slightly modified version of the code in the link) and add the missing references to the unit test project. Start the WCF service without debugging, change the portnumber in the test if needed and run the test. As mentioned in the article, the code can still use some adjustments before it could be put into production.
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Description;
using System.Xml.Linq;
namespace UnitTestProject1
{
public class ServiceDetail
{
public Uri WSDLUri { get; set; }
public Uri ServiceUri { get; set; }
public String ContractName { get; set; }
public string MethodName { get; set; }
}
public class GenericService
{
public object Call(ServiceDetail svc, List<object> payLoads)
{
//Import WSDL
WsdlImporter imptr = ImportWSDL(svc.WSDLUri);
//Extract Service and Data Contract Descriptions
Collection<ContractDescription> svcCtrDesc = imptr.ImportAllContracts();
//Compile the description to assembly
var assembly = GetAssembly(svcCtrDesc);
if (assembly == null) return null;
//Extract all end points available on the WSDL
IDictionary<string, IEnumerable<ServiceEndpoint>> allEP = GetEndPointsOfEachServiceContract(imptr, svcCtrDesc);
IEnumerable<ServiceEndpoint> currentSvcEP;
if (allEP.TryGetValue(svc.ContractName, out currentSvcEP))
{
//Find the endpoint of the service to which the proxy needs to contact
var svcEP = currentSvcEP.First(x => x.ListenUri.AbsoluteUri == svc.ServiceUri.AbsoluteUri);
//Generate proxy
var proxy = GetProxy(svc.ContractName, svcEP, assembly);
//Deserialize each payload argument to object
List<object> pls = new List<object>();
foreach (var pl in payLoads)
{
object clrObj = null;
try
{
clrObj = Deserialize(pl.ToString(), assembly);
}
catch
{
clrObj = pl;
}
pls.Add(clrObj);
}
//Find opration contract on the proxy and invoke
return proxy.GetType().GetMethod(svc.MethodName).Invoke(proxy, pls.ToArray());
}
return null;
}
private Assembly GetAssembly(Collection<ContractDescription> svcCtrDesc)
{
CodeCompileUnit ccu = GetServiceAndDataContractCompileUnitFromWSDL(svcCtrDesc);
CompilerResults rslt = GenerateContractsAssemblyInMemory(new CodeCompileUnit[] { ccu });
if (!rslt.Errors.HasErrors)
return rslt.CompiledAssembly;
return null;
}
private object GetProxy(string ctrName, ServiceEndpoint svcEP, Assembly assembly)
{
Type prxyT = assembly.GetTypes().First(t => t.IsClass && t.GetInterface(ctrName) != null && t.GetInterface(typeof(ICommunicationObject).Name) != null);
object proxy = assembly.CreateInstance(prxyT.Name, false, System.Reflection.BindingFlags.CreateInstance,
null, new object[] { svcEP.Binding, svcEP.Address }, CultureInfo.CurrentCulture, null);
return proxy;
}
private WsdlImporter ImportWSDL(Uri wsdlLoc)
{
MetadataExchangeClient mexC = new MetadataExchangeClient(wsdlLoc, MetadataExchangeClientMode.HttpGet);
mexC.ResolveMetadataReferences = true;
MetadataSet metaSet = mexC.GetMetadata();
return new WsdlImporter(metaSet);
}
private Dictionary<string, IEnumerable<ServiceEndpoint>> GetEndPointsOfEachServiceContract(WsdlImporter imptr, Collection<ContractDescription> svcCtrDescs)
{
ServiceEndpointCollection allEP = imptr.ImportAllEndpoints();
var ctrEP = new Dictionary<string, IEnumerable<ServiceEndpoint>>();
foreach (ContractDescription svcCtrDesc in svcCtrDescs)
{
List<ServiceEndpoint> eps = allEP.Where(x => x.Contract.Name == svcCtrDesc.Name).ToList();
ctrEP.Add(svcCtrDesc.Name, eps);
}
return ctrEP;
}
private CodeCompileUnit GetServiceAndDataContractCompileUnitFromWSDL(Collection<ContractDescription> svcCtrDescs)
{
ServiceContractGenerator svcCtrGen = new ServiceContractGenerator();
foreach (ContractDescription ctrDesc in svcCtrDescs)
{
svcCtrGen.GenerateServiceContractType(ctrDesc);
}
return svcCtrGen.TargetCompileUnit;
}
private object Deserialize(string xml, Assembly assembly)
{
Type ctr = GetDataContractType(xml, assembly);
return Deserialize(xml, ctr);
}
private object Deserialize(string xml, Type toType)
{
using (Stream stream = new MemoryStream())
{
byte[] data = System.Text.Encoding.UTF8.GetBytes(xml);
stream.Write(data, 0, data.Length);
stream.Position = 0;
DataContractSerializer d = new DataContractSerializer(toType);
return d.ReadObject(stream);
}
}
private Type GetDataContractType(string xml, Assembly assembly)
{
var serializedXML = ConvertToXML(xml);
var match = assembly.GetTypes().First(x => x.Name == serializedXML.Root.Name.LocalName);
return match;
}
private XDocument ConvertToXML(string xml)
{
using (Stream stream = new MemoryStream())
{
byte[] data = System.Text.Encoding.UTF8.GetBytes(xml);
stream.Write(data, 0, data.Length);
stream.Position = 0;
return XDocument.Load(stream);
}
}
private CompilerResults GenerateContractsAssemblyInMemory(params CodeCompileUnit[] codeCompileUnits)
{
// Generate a code file for the contracts
CodeGeneratorOptions opts = new CodeGeneratorOptions();
opts.BracingStyle = "C";
CodeDomProvider pro = CodeDomProvider.CreateProvider("C#");
// Compile the code file to an in-memory assembly
// Don't forget to add all WCF-related assemblies as references
CompilerParameters prms = new CompilerParameters(new string[] { "System.dll", "System.ServiceModel.dll",
"System.Runtime.Serialization.dll"});
prms.GenerateInMemory = true;
prms.GenerateExecutable = false;
return pro.CompileAssemblyFromDom(prms, codeCompileUnits);
}
}
[TestClass]
public class UnitTest1
{
[TestMethod]
public void TestMethod1()
{
// Arrange
var target = new GenericService();
var serviceDetail = new ServiceDetail
{
WSDLUri = new Uri("http://localhost:13152/Service1.svc?singleWsdl"),
ServiceUri = new Uri("http://localhost:13152/Service1.svc"),
ContractName = "IService1",
MethodName = "GetData"
};
var arguments = new List<object> { 5 };
// Act
var result = target.Call(serviceDetail, arguments);
// Assert
Assert.AreEqual("You entered: 5", result);
}
}
}

Accessing Yelp's OAuth 1.0a API with DotNetOpenAuth

Has anyone had success using DotNetOpenAuth to access Yelp's v2 api using DotNetOpenAuth?
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();
}
}
}
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)
Any suggestions? Am I on the right trail?

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.
Download link is 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();
}

You can use RestSharp api: https://github.com/JustinBeckwith/YelpSharp in combination with OAuthBase: http://oauth.googlecode.com/svn/code/csharp/OAuthBase.cs.
In YelpSharp implementation change Yelp.cs class method makeRequest with this:
protected string makeRequest(string area, string id, Dictionary<string, string> parameters)
{
// build the url with parameters
var url = area;
if (!String.IsNullOrEmpty(id)) url += "/" + HttpUtility.UrlEncode(id);
if (parameters != null)
{
bool firstp = true;
string[] keys = parameters.Keys.ToArray();
foreach (string _key in keys)
{
if (firstp) url += "?";
else url += "&";
firstp = false;
//Double URL encode "&" to prevent restsharp from treating the second half of the string as a new parameter
parameters[_key] = parameters[_key].Replace("&", "%26");
parameters[_key] = parameters[_key].Replace("+", "%2B");
parameters[_key] = parameters[_key].Replace(" ", "%2B");
url += _key + "=" + parameters[_key]; //HttpUtility.UrlEncode(parameters[_key]);
}
}
var client = new RestClient(rootUri);
var request = new RestRequest(Method.GET);
OAuthBase oAuth = new OAuthBase();
string nonce = oAuth.GenerateNonce();
string timeStamp = oAuth.GenerateTimeStamp();
string normalizedUrl;
string normalizedRequestParameters;
string sig = oAuth.GenerateSignature(new Uri(string.Format("{0}/{1}", client.BaseUrl, url)),
options.ConsumerKey, options.ConsumerSecret,
options.AccessToken, options.AccessTokenSecret,
"GET", timeStamp, nonce, out normalizedUrl, out normalizedRequestParameters);
sig = HttpUtility.UrlEncode(sig);
request.Resource = string.Format(area);
if (parameters != null)
{
foreach (var p in parameters)
{
request.AddParameter(p.Key, p.Value);
}
}
request.AddParameter("oauth_consumer_key", options.ConsumerKey);
request.AddParameter("oauth_token", options.AccessToken);
request.AddParameter("oauth_nonce", nonce);
request.AddParameter("oauth_timestamp", timeStamp);
request.AddParameter("oauth_signature_method", "HMAC-SHA1");
request.AddParameter("oauth_version", "1.0");
request.AddParameter("oauth_signature", sig);
var response = client.Execute(request);
return response.Content;
}
Test like this:
public void testYelp()
{
string _term = "food";
string _location = "San Francisco";
var o = Credentials.GetOptions();
var y = new Yelp(o);
var searchOptions = new SearchOptions();
searchOptions.GeneralOptions = new GeneralOptions()
{
term = _term
};
searchOptions.LocationOptions = new LocationOptions()
{
location = _location
};
var results = y.Search(searchOptions);
}

amazon product advertising api - item lookup request working example

would anyone have a working example of an amazon ITEMLOOKUP ?>
i have the following code but it does not seem to work:
string ISBN = "0393326381";
string ASIN = "";
if (!(string.IsNullOrEmpty(ISBN) && string.IsNullOrEmpty(ASIN)))
{
AWSECommerceServicePortTypeChannel service = new AWSECommerceServicePortTypeChannel();
ItemLookup lookup = new ItemLookup();
ItemLookupRequest request = new ItemLookupRequest();
lookup.AssociateTag = secretKey;
lookup.AWSAccessKeyId = accessKeyId;
if (string.IsNullOrEmpty(ASIN))
{
request.IdType = ItemLookupRequestIdType.ISBN;
request.ItemId = new string[] { ISBN.Replace("-", "") };
}
else
{
request.IdType = ItemLookupRequestIdType.ASIN;
request.ItemId = new string[] { ASIN };
}
request.ResponseGroup = new string[] { "OfferSummary" };
lookup.Request = new ItemLookupRequest[] { request };
response = service.ItemLookup(lookup);
if (response.Items.Length > 0 && response.Items[0].Item.Length > 0)
{
Item item = response.Items[0].Item[0];
if (item.MediumImage == null)
{
//bookImageHyperlink.Visible = false;
}
else
{
//bookImageHyperlink.ImageUrl = item.MediumImage.URL;
}
//bookImageHyperlink.NavigateUrl = item.DetailPageURL;
//bookTitleHyperlink.Text = item.ItemAttributes.Title;
//bookTitleHyperlink.NavigateUrl = item.DetailPageURL;
if (item.OfferSummary.LowestNewPrice == null)
{
if (item.OfferSummary.LowestUsedPrice == null)
{
//priceHyperlink.Visible = false;
}
else
{
//priceHyperlink.Text = string.Format("Buy used {0}", item.OfferSummary.LowestUsedPrice.FormattedPrice);
//priceHyperlink.NavigateUrl = item.DetailPageURL;
}
}
else
{
//priceHyperlink.Text = string.Format("Buy new {0}", item.OfferSummary.LowestNewPrice.FormattedPrice);
//priceHyperlink.NavigateUrl = item.DetailPageURL;
}
if (item.ItemAttributes.Author != null)
{
//authorLabel.Text = string.Format("By {0}", string.Join(", ", item.ItemAttributes.Author));
}
else
{
//authorLabel.Text = string.Format("By {0}", string.Join(", ", item.ItemAttributes.Creator.Select(c => c.Value).ToArray()));
}
/*
ItemLink link = item.ItemLinks.Where(i => i.Description.Contains("Wishlist")).FirstOrDefault();
if (link == null)
{
//wishListHyperlink.Visible = false;
}
else
{
//wishListHyperlink.NavigateUrl = link.URL;
}
* */
}
}
}
the problem is with this:
thisshould be defined differently but i do not know how AWSECommerceServicePortTypeChannel service = new AWSECommerceServicePortTypeChannel();

Say, that code looks awful familiar. You're missing the Endpoint signing piece from when they switched over to requiring that you add message signing. You need to add a behavior on your client. Here's the change to your code above:
if (!(string.IsNullOrEmpty(ISBN) && string.IsNullOrEmpty(ASIN)))
{
AWSECommerceServicePortTypeClient client = new AWSECommerceServicePortTypeClient();
client.ChannelFactory.Endpoint.Behaviors.Add(
new Amazon.AmazonSigningEndpointBehavior(
accessKeyId,
secretKey);
ItemLookup lookup = new ItemLookup();
ItemLookupRequest request = new ItemLookupRequest();
lookup.AssociateTag = accessKeyId;
lookup.AWSAccessKeyId = secretKey;
//... etc.
And here's the Endpoint (I can't take credit for this, I wish I could remember who should):
namespace Amazon
{
public class AmazonSigningEndpointBehavior : IEndpointBehavior {
private string accessKeyId = "";
private string secretKey = "";
public AmazonSigningEndpointBehavior(string accessKeyId, string secretKey) {
this.accessKeyId = accessKeyId;
this.secretKey = secretKey;
}
public void ApplyClientBehavior(ServiceEndpoint serviceEndpoint, ClientRuntime clientRuntime) {
clientRuntime.MessageInspectors.Add(new AmazonSigningMessageInspector(accessKeyId, secretKey));
}
public void ApplyDispatchBehavior(ServiceEndpoint serviceEndpoint, EndpointDispatcher endpointDispatcher) { return; }
public void Validate(ServiceEndpoint serviceEndpoint) { return; }
public void AddBindingParameters(ServiceEndpoint serviceEndpoint, BindingParameterCollection bindingParameters) { return; }
}
}
Oh. And you'll need the MessageInspector for that to work.
namespace Amazon
{
public class AmazonSigningMessageInspector : IClientMessageInspector {
private string accessKeyId = "";
private string secretKey = "";
public AmazonSigningMessageInspector(string accessKeyId, string secretKey) {
this.accessKeyId = accessKeyId;
this.secretKey = secretKey;
}
public object BeforeSendRequest(ref Message request, IClientChannel channel) {
// prepare the data to sign
string operation = Regex.Match(request.Headers.Action, "[^/]+$").ToString();
DateTime now = DateTime.UtcNow;
string timestamp = now.ToString("yyyy-MM-ddTHH:mm:ssZ");
string signMe = operation + timestamp;
byte[] bytesToSign = Encoding.UTF8.GetBytes(signMe);
// sign the data
byte[] secretKeyBytes = Encoding.UTF8.GetBytes(secretKey);
HMAC hmacSha256 = new HMACSHA256(secretKeyBytes);
byte[] hashBytes = hmacSha256.ComputeHash(bytesToSign);
string signature = Convert.ToBase64String(hashBytes);
// add the signature information to the request headers
request.Headers.Add(new AmazonHeader("AWSAccessKeyId", accessKeyId));
request.Headers.Add(new AmazonHeader("Timestamp", timestamp));
request.Headers.Add(new AmazonHeader("Signature", signature));
return null;
}
public void AfterReceiveReply(ref Message reply, object correlationState) { }
}
}
And finally, the Header:
namespace Amazon
{
public class AmazonHeader : MessageHeader
{
private string name;
private string value;
public AmazonHeader(string name, string value)
{
this.name = name;
this.value = value;
}
public override string Name { get { return name; } }
public override string Namespace { get { return "http://security.amazonaws.com/doc/2007-01-01/"; } }
protected override void OnWriteHeaderContents(XmlDictionaryWriter xmlDictionaryWriter, MessageVersion messageVersion)
{
xmlDictionaryWriter.WriteString(value);
}
}
}
Yes, they made it complicated when they started requiring message signing...

A simple and easy library is available on nuget.
PM> Install-Package Nager.AmazonProductAdvertising
Example
var authentication = new AmazonAuthentication("accesskey", "secretkey");
var client = new AmazonProductAdvertisingClient(authentication, AmazonEndpoint.US);
var result = await client.GetItemsAsync("B00BYPW00I");

To perform a lookup for anything other then an ASIN, you need to specify the "SearchIndex" property. You can simply set it to "All".
var request = new ItemLookupRequest();
request.ItemId = new[] {upcCode};
request.IdType = ItemLookupRequestIdType.UPC;
request.IdTypeSpecified = true;
request.SearchIndex = "All";
Here is a link to the documentation: http://docs.amazonwebservices.com/AWSECommerceService/2011-08-01/DG/index.html?ItemLookup.html. Note the description of the SearchIndex parameter:
Constraint:If ItemIdis an ASIN, a search index cannot be specified in
the request. Required for non-ASIN ItemIds.

I actually built a little wrapper around it so it hands you back a handy object graph. I have the source up on BitBucket and a little more about it on the C# Amazon ItemLookup page.
C# Amazon ItemLookup
You can make calls like:
var item = client.LookupByAsin("B0037X9N5U");
double? price = item.GetLowestPrice();