关于 .net：使用 Google Analytics API 在 C# 中显示信息

    public GoogleAnalyticsAPI(string keyPath, string accountEmailAddress)
    {
        var certificate = new X509Certificate2(keyPath,"notasecret", X509KeyStorageFlags.Exportable);

        var credentials = new ServiceAccountCredential(
           new ServiceAccountCredential.Initializer(accountEmailAddress)
           {
               Scopes = new[] { AnalyticsService.Scope.AnalyticsReadonly }
           }.FromCertificate(certificate));

        Service = new AnalyticsService(new BaseClientService.Initializer()
            {
                HttpClientInitializer = credentials,
                ApplicationName ="WorthlessVariable"
            });
    }

    public AnalyticDataPoint GetAnalyticsData(string profileId, string[] dimensions, string[] metrics, DateTime startDate, DateTime endDate)
    {
        AnalyticDataPoint data = new AnalyticDataPoint();
        if (!profileId.Contains("ga:"))
            profileId = string.Format("ga:{0}", profileId);

        //Make initial call to service.
        //Then check if a next link exists in the response,
        //if so parse and call again using start index param.
        GaData response = null;
        do
        {
            int startIndex = 1;
            if (response != null && !string.IsNullOrEmpty(response.NextLink))
            {
                Uri uri = new Uri(response.NextLink);
                var paramerters = uri.Query.Split(‘&’);
                string s = paramerters.First(i => i.Contains("start-index")).Split(‘=’)[1];
                startIndex = int.Parse(s);
            }

            var request = BuildAnalyticRequest(profileId, dimensions, metrics, startDate, endDate, startIndex);
            response = request.Execute();
            data.ColumnHeaders = response.ColumnHeaders;
            data.Rows.AddRange(response.Rows);

        } while (!string.IsNullOrEmpty(response.NextLink));

        return data;
    }

    private DataResource.GaResource.GetRequest BuildAnalyticRequest(string profileId, string[] dimensions, string[] metrics,
                                                                        DateTime startDate, DateTime endDate, int startIndex)
    {
        DataResource.GaResource.GetRequest request = Service.Data.Ga.Get(profileId, startDate.ToString("yyyy-MM-dd"),
                                                                            endDate.ToString("yyyy-MM-dd"), string.Join(",", metrics));
        request.Dimensions = string.Join(",", dimensions);
        request.StartIndex = startIndex;
        return request;
    }

    public IList<Profile> GetAvailableProfiles()
    {
        var response = Service.Management.Profiles.List("~all","~all").Execute();
        return response.Items;
    }

    public class AnalyticDataPoint
    {
        public AnalyticDataPoint()
        {
            Rows = new List<IList<string>>();
        }

        public IList<GaData.ColumnHeadersData> ColumnHeaders { get; set; }
        public List<IList<string>> Rows { get; set; }
    }
}

        public Analytics(string user, string password, string table)
        {
            this.ClientUserName = user;
            this.ClientPassword = password;
            this.TableID = table;

            // Configure GA API.
            analyticsService = new AnalyticsService("gaExportAPI_acctSample_v2.0");
            // Client Login Authorization.
            analyticsService.setUserCredentials(ClientUserName, ClientPassword);
        }

        /// <summary>
        /// Get the page views for a particular page path
        /// </summary>
        /// <param name="pagePath"></param>
        /// <param name="startDate"></param>
        /// <param name="endDate"></param>
        /// <param name="isPathAbsolute">make this false if the pagePath is a regular expression</param>
        /// <returns></returns>
        public int GetPageViewsForPagePath(string pagePath, DateTime startDate, DateTime endDate, bool isPathAbsolute = true)
        {
            int output = 0;

            // GA Data Feed query uri.
            String baseUrl ="https://www.google.com/analytics/feeds/data";

            DataQuery query = new DataQuery(baseUrl);
            query.Ids = TableID;
            //query.Dimensions ="ga:source,ga:medium";
            query.Metrics ="ga:pageviews";
            //query.Segment ="gaid::-11";
            var filterPrefix = isPathAbsolute ?"ga:pagepath==" :"ga:pagepath=~";
            query.Filters = filterPrefix + pagePath;
            //query.Sort ="-ga:visits";
            //query.NumberToRetrieve = 5;
            query.GAStartDate = startDate.ToString("yyyy-MM-dd", CultureInfo.InvariantCulture);
            query.GAEndDate = endDate.ToString("yyyy-MM-dd", CultureInfo.InvariantCulture);
            Uri url = query.Uri;
            DataFeed feed = analyticsService.Query(query);
            output = Int32.Parse(feed.Aggregates.Metrics[0].Value);

            return output;
        }

        public Dictionary<string, int> PageViewCounts(string pagePathRegEx, DateTime startDate, DateTime endDate)
        {
            // GA Data Feed query uri.
            String baseUrl ="https://www.google.com/analytics/feeds/data";

            DataQuery query = new DataQuery(baseUrl);
            query.Ids = TableID;
            query.Dimensions ="ga:pagePath";
            query.Metrics ="ga:pageviews";
            //query.Segment ="gaid::-11";
            var filterPrefix ="ga:pagepath=~";
            query.Filters = filterPrefix + pagePathRegEx;
            //query.Sort ="-ga:visits";
            //query.NumberToRetrieve = 5;
            query.GAStartDate = startDate.ToString("yyyy-MM-dd", CultureInfo.InvariantCulture);
            query.GAEndDate = endDate.ToString("yyyy-MM-dd", CultureInfo.InvariantCulture);
            Uri url = query.Uri;
            DataFeed feed = analyticsService.Query(query);

            var returnDictionary = new Dictionary<string, int>();
            foreach (var entry in feed.Entries)
                returnDictionary.Add(((DataEntry)entry).Dimensions[0].Value, Int32.Parse(((DataEntry)entry).Metrics[0].Value));

            return returnDictionary;
        }
    }
}

    public class GooglePageViewCounter : IPageViewCounter
    {
        private string GoogleUserName
        {
            get
            {
                return ConfigurationManager.AppSettings["googleUserName"];
            }
        }

        private string GooglePassword
        {
            get
            {
                return ConfigurationManager.AppSettings["googlePassword"];
            }
        }

        private string GoogleAnalyticsTableName
        {
            get
            {
                return ConfigurationManager.AppSettings["googleAnalyticsTableName"];
            }
        }

        private Analytics analytics;

        public GooglePageViewCounter()
        {
            analytics = new Analytics(GoogleUserName, GooglePassword, GoogleAnalyticsTableName);
        }

        #region IPageViewCounter Members

        public int GetPageViewCount(string relativeUrl, DateTime startDate, DateTime endDate, bool isPathAbsolute = true)
        {
            int output = 0;
            try
            {
                output = analytics.GetPageViewsForPagePath(relativeUrl, startDate, endDate, isPathAbsolute);
            }
            catch (Exception ex)
            {
                Logger.Error(ex);
            }

            return output;
        }

        public Dictionary<string, int> PageViewCounts(string pagePathRegEx, DateTime startDate, DateTime endDate)
        {
            var input = analytics.PageViewCounts(pagePathRegEx, startDate, endDate);
            var output = new Dictionary<string, int>();

            foreach (var item in input)
            {
                if (item.Key.Contains(‘&’))
                {
                    string[] key = item.Key.Split(new char[] { ‘?’, ‘&’ });
                    string newKey = key[0] +"?" + key.FirstOrDefault(k => k.StartsWith("p="));

                    if (output.ContainsKey(newKey))
                        output[newKey] += item.Value;
                    else
                        output[newKey] = item.Value;
                }
                else
                    output.Add(item.Key, item.Value);
            }
            return output;
        }

        #endregion
    }
}

var cr = JsonConvert.DeserializeObject(json);

var xCred = new ServiceAccountCredential(new ServiceAccountCredential.Initializer(cr.client_email)
{
    Scopes = new[] {
        AnalyticsReportingService.Scope.Analytics
    }
}.FromPrivateKey(cr.private_key));

using (var svc = new AnalyticsReportingService(
    new BaseClientService.Initializer
    {
        HttpClientInitializer = xCred,
        ApplicationName ="[Your Application Name]"
    })
)
{
    // Create the DateRange object.
    DateRange dateRange = new DateRange() { StartDate ="2017-05-01", EndDate ="2017-05-31" };

    // Create the Metrics object.
    Metric sessions = new Metric { Expression ="ga:sessions", Alias ="Sessions" };

    //Create the Dimensions object.
    Dimension browser = new Dimension { Name ="ga:browser" };

    // Create the ReportRequest object.
    ReportRequest reportRequest = new ReportRequest
    {
        ViewId ="[A ViewId in your account]",
        DateRanges = new List() { dateRange },
        Dimensions = new List() { browser },
        Metrics = new List() { sessions }
    };

    List requests = new List();
    requests.Add(reportRequest);

    // Create the GetReportsRequest object.
    GetReportsRequest getReport = new GetReportsRequest() { ReportRequests = requests };

    // Call the batchGet method.
    GetReportsResponse response = svc.Reports.BatchGet(getReport).Execute();
}

            gapi.analytics.ready(function () {
                /**
                 * Authorize the user with an access token obtained server side.
                 */
                gapi.analytics.auth.authorize({
                    ‘serverAuth’: {
                        ‘access_token’: access_token
                    }
                });
                /**
                 * Creates a new DataChart instance showing sessions.
                 * It will be rendered inside an element with the id"chart-1-container".
                 */
                var dataChart1 = new gapi.analytics.googleCharts.DataChart({
                    query: {
                        ‘ids’: ‘ga:53861036’, // VIEW ID <– Goto your google analytics account and select the domain whose analytics data you want to display on your webpage. From the URL  ex: a507598w53044903p53861036. Copy the digits after"p". It is your view ID
                        ‘start-date’: ‘2016-04-01’,
                        ‘end-date’: ‘2016-04-30’,
                        ‘metrics’: ‘ga:sessions’,
                        ‘dimensions’: ‘ga:date’
                    },
                    chart: {
                        ‘container’: ‘chart-1-container’,
                        ‘type’: ‘LINE’,
                        ‘options’: {
                            ‘width’: ‘100%’
                        }
                    }
                });
                dataChart1.execute();

                /**
                 * Creates a new DataChart instance showing top 5 most popular demos/tools
                 * amongst returning users only.
                 * It will be rendered inside an element with the id"chart-3-container".
                 */

            });

    namespace googleAnalytics
    {
        public partial class api : System.Web.UI.Page
        {
            public const string SCOPE_ANALYTICS_READONLY ="https://www.googleapis.com/auth/analytics.readonly";

            string ServiceAccountUser ="googleanalytics@googleanalytics.iam.gserviceaccount.com"; //service account email ID
            string keyFile = @"D://key.p12"; //file link to downloaded key with p12 extension
            protected void Page_Load(object sender, EventArgs e)
            {

               string Token = Convert.ToString(GetAccessToken(ServiceAccountUser, keyFile, SCOPE_ANALYTICS_READONLY));

               accessToken.Value = Token;

                var certificate = new X509Certificate2(keyFile,"notasecret", X509KeyStorageFlags.Exportable);

                var credentials = new ServiceAccountCredential(

                    new ServiceAccountCredential.Initializer(ServiceAccountUser)
                    {
                        Scopes = new[] { AnalyticsService.Scope.AnalyticsReadonly }
                    }.FromCertificate(certificate));

                var service = new AnalyticsService(new BaseClientService.Initializer()
                {
                    HttpClientInitializer = credentials,
                    ApplicationName ="Google Analytics API"
                });

                string profileId ="ga:53861036";
                string startDate ="2016-04-01";
                string endDate ="2016-04-30";
                string metrics ="ga:sessions,ga:users,ga:pageviews,ga:bounceRate,ga:visits";

                DataResource.GaResource.GetRequest request = service.Data.Ga.Get(profileId, startDate, endDate, metrics);

                GaData data = request.Execute();
                List<string> ColumnName = new List<string>();
                foreach (var h in data.ColumnHeaders)
                {
                    ColumnName.Add(h.Name);
                }

                List<double> values = new List<double>();
                foreach (var row in data.Rows)
                {
                    foreach (var item in row)
                    {
                        values.Add(Convert.ToDouble(item));
                    }

                }
                values[3] = Math.Truncate(100 * values[3]) / 100;

                txtSession.Text = values[0].ToString();
                txtUsers.Text = values[1].ToString();
                txtPageViews.Text = values[2].ToString();
                txtBounceRate.Text = values[3].ToString();
                txtVisits.Text = values[4].ToString();

            }

         public static dynamic GetAccessToken(string clientIdEMail, string keyFilePath, string scope)
        {
            // certificate
            var certificate = new X509Certificate2(keyFilePath,"notasecret");

            // header
            var header = new { typ ="JWT", alg ="RS256" };

            // claimset
            var times = GetExpiryAndIssueDate();
            var claimset = new
            {
                iss = clientIdEMail,
                scope = scope,
                aud ="https://accounts.google.com/o/oauth2/token",
                iat = times[0],
                exp = times[1],
            };

            JavaScriptSerializer ser = new JavaScriptSerializer();

            // encoded header
            var headerSerialized = ser.Serialize(header);
            var headerBytes = Encoding.UTF8.GetBytes(headerSerialized);
            var headerEncoded = Convert.ToBase64String(headerBytes);

            // encoded claimset
            var claimsetSerialized = ser.Serialize(claimset);
            var claimsetBytes = Encoding.UTF8.GetBytes(claimsetSerialized);
            var claimsetEncoded = Convert.ToBase64String(claimsetBytes);

            // input
            var input = headerEncoded +"." + claimsetEncoded;
            var inputBytes = Encoding.UTF8.GetBytes(input);

            // signature
            var rsa = certificate.PrivateKey as RSACryptoServiceProvider;
            var cspParam = new CspParameters
            {
                KeyContainerName = rsa.CspKeyContainerInfo.KeyContainerName,
                KeyNumber = rsa.CspKeyContainerInfo.KeyNumber == KeyNumber.Exchange ? 1 : 2
            };
            var aescsp = new RSACryptoServiceProvider(cspParam) { PersistKeyInCsp = false };
            var signatureBytes = aescsp.SignData(inputBytes,"SHA256");
            var signatureEncoded = Convert.ToBase64String(signatureBytes);

            // jwt
            var jwt = headerEncoded +"." + claimsetEncoded +"." + signatureEncoded;

            var client = new WebClient();
            client.Encoding = Encoding.UTF8;
            var uri ="https://accounts.google.com/o/oauth2/token";
            var content = new NameValueCollection();

            content["assertion"] = jwt;
            content["grant_type"] ="urn:ietf:params:oauth:grant-type:jwt-bearer";

            string response = Encoding.UTF8.GetString(client.UploadValues(uri,"POST", content));

            var result = ser.Deserialize<dynamic>(response);

            object pulledObject = null;

            string token ="access_token";
            if (result.ContainsKey(token))
            {
                pulledObject = result[token];
            }

            //return result;
            return pulledObject;
        }

        private static int[] GetExpiryAndIssueDate()
        {
            var utc0 = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
            var issueTime = DateTime.UtcNow;

            var iat = (int)issueTime.Subtract(utc0).TotalSeconds;
            var exp = (int)issueTime.AddMinutes(55).Subtract(utc0).TotalSeconds;

            return new[] { iat, exp };
        }

        }
    }

                    if (context.RefreshToken != null)
                    {
                        context.Identity.AddClaim(new Claim("GoogleRefreshToken", context.RefreshToken));
                    }
                    context.Identity.AddClaim(new Claim("GoogleUserId", context.Id));
                    context.Identity.AddClaim(new Claim("GoogleTokenIssuedAt", DateTime.Now.ToBinary().ToString()));
                    var expiresInSec = 10000;
                    context.Identity.AddClaim(new Claim("GoogleTokenExpiresIn", expiresInSec.ToString()));

                    return Task.FromResult(0);
                }
            },

            SignInAsAuthenticationType = DefaultAuthenticationTypes.ApplicationCookie
        };
        googleApiOptions.Scope.Add("openid"); // Need to add for google+
        googleApiOptions.Scope.Add("profile");// Need to add for google+
        googleApiOptions.Scope.Add("email");// Need to add for google+
        googleApiOptions.Scope.Add("https://www.googleapis.com/auth/analytics.readonly");

        app.UseGoogleAuthentication(googleApiOptions);

public class HomeController : Controller
{
    AnalyticsService service;
    public IAuthenticationManager AuthenticationManager
    {
        get
        {
            return HttpContext.GetOwinContext().Authentication;
        }
    }

    public async Task<ActionResult> AccountList()
    {
        service = new AnalyticsService(new BaseClientService.Initializer()
        {
            HttpClientInitializer = await GetCredentialForApiAsync(),
            ApplicationName ="Analytics API sample",
        });

        //Account List
        ManagementResource.AccountsResource.ListRequest AccountListRequest = service.Management.Accounts.List();
        //service.QuotaUser ="MyApplicationProductKey";
        Accounts AccountList = AccountListRequest.Execute();

        return View();
    }

    private async Task<UserCredential> GetCredentialForApiAsync()
    {
        var initializer = new GoogleAuthorizationCodeFlow.Initializer
        {
            ClientSecrets = new ClientSecrets
            {
                ClientId = ClientId,
                ClientSecret = ClientSecret,
            },
            Scopes = new[] {"https://www.googleapis.com/auth/analytics.readonly" }
        };
        var flow = new GoogleAuthorizationCodeFlow(initializer);

        var identity = await AuthenticationManager.GetExternalIdentityAsync(DefaultAuthenticationTypes.ApplicationCookie);
        if (identity == null)
        {
            Redirect("/Account/Login");
        }

        var userId = identity.FindFirstValue("GoogleUserId");

        var token = new TokenResponse()
        {
            AccessToken = identity.FindFirstValue("Google_AccessToken"),
            RefreshToken = identity.FindFirstValue("GoogleRefreshToken"),
            Issued = DateTime.FromBinary(long.Parse(identity.FindFirstValue("GoogleTokenIssuedAt"))),
            ExpiresInSeconds = long.Parse(identity.FindFirstValue("GoogleTokenExpiresIn")),
        };

        return new UserCredential(flow, userId, token);
    }
}