Postivo 0.1.0

Postivo

SDK Example Usage

Sending Shipment to single recipient

This example demonstrates simple sending Shipment to a single recipient:

using Postivo;
using Postivo.Models.Components;
using System.Collections.Generic;

var sdk = new Client(bearer: "<YOUR API ACCESS TOKEN>");

Shipment req = new Shipment() {
    Recipients = ShipmentRecipients.CreateRecipients(
        Recipients.CreateRecipientInline(
            new RecipientInline() {
                Name = "Jan Nowak",
                Name2 = "Firma testowa Sp. z o.o.",
                Address = "ul. Testowa",
                HomeNumber = "23",
                FlatNumber = "2",
                PostCode = "00-999",
                City = "Warszawa",
                PhoneNumber = "+48666666666",
                Postscript = "Komunikat",
                CustomId = "1234567890",
            }
        )
    ),
    Documents = ShipmentDocuments.CreateArrayOfDocuments(
        new List<Documents>() {
            Documents.CreateDocumentPdf(
                new DocumentPdf() {
                    FileStream = "<document_1 content encoded to base64>",
                    FileName = "document1.pdf",
                }
            ),
            Documents.CreateDocumentPdf(
                new DocumentPdf() {
                    FileStream = "<document_2 content encoded to base64>",
                    FileName = "document2.pdf",
                }
            ),
        }
    ),
    Options = Options.CreateShipmentOptions(
        new ShipmentOptions() {
            PredefinedConfigId = 2670,
        }
    ),
};

var res = await sdk.Shipments.DispatchAsync(req);

// handle response

Checking the price of a shipment for single recipient

This example demonstrates simple checking the price of a Shipment to a single recipient:

using Postivo;
using Postivo.Models.Components;
using System.Collections.Generic;

var sdk = new Client(bearer: "<YOUR API ACCESS TOKEN>");

Shipment req = new Shipment() {
    Recipients = ShipmentRecipients.CreateRecipients(
        Recipients.CreateRecipientInline(
            new RecipientInline() {
                Name = "Jan Nowak",
                Name2 = "Firma testowa Sp. z o.o.",
                Address = "ul. Testowa",
                HomeNumber = "23",
                FlatNumber = "2",
                PostCode = "00-999",
                City = "Warszawa",
                PhoneNumber = "+48666666666",
                Postscript = "Komunikat",
                CustomId = "1234567890",
            }
        )
    ),
    Documents = ShipmentDocuments.CreateArrayOfDocuments(
        new List<Documents>() {
            Documents.CreateDocumentPdf(
                new DocumentPdf() {
                    FileStream = "<document_1 content encoded to base64>",
                    FileName = "document1.pdf",
                }
            ),
            Documents.CreateDocumentPdf(
                new DocumentPdf() {
                    FileStream = "<document_2 content encoded to base64>",
                    FileName = "document2.pdf",
                }
            ),
        }
    ),
    Options = Options.CreateShipmentOptions(
        new ShipmentOptions() {
            PredefinedConfigId = 2670,
        }
    ),
};

var res = await sdk.Shipments.PriceAsync(req);

// handle response

Authentication

Per-Client Security Schemes

This SDK supports the following security scheme globally:

To authenticate with the API the Bearer parameter must be set when initializing the SDK client instance. For example:

using Postivo;
using Postivo.Models.Components;

var sdk = new Client(bearer: "<YOUR API ACCESS TOKEN>");

var res = await sdk.Accounts.GetAsync();

// handle response

Retries

Some of the endpoints in this SDK support retries. If you use the SDK without any configuration, it will fall back to the default retry strategy provided by the API. However, the default retry strategy can be overridden on a per-operation basis, or across the entire SDK.

To change the default retry strategy for a single API call, simply pass a RetryConfig to the call:

using Postivo;
using Postivo.Models.Components;

var sdk = new Client(bearer: "<YOUR API ACCESS TOKEN>");

var res = await sdk.Accounts.GetAsync(retryConfig: new RetryConfig(
    strategy: RetryConfig.RetryStrategy.BACKOFF,
    backoff: new BackoffStrategy(
        initialIntervalMs: 1L,
        maxIntervalMs: 50L,
        maxElapsedTimeMs: 100L,
        exponent: 1.1
    ),
    retryConnectionErrors: false
));

// handle response

If you'd like to override the default retry strategy for all operations that support retries, you can use the RetryConfig optional parameter when intitializing the SDK:

using Postivo;
using Postivo.Models.Components;

var sdk = new Client(
    retryConfig: new RetryConfig(
        strategy: RetryConfig.RetryStrategy.BACKOFF,
        backoff: new BackoffStrategy(
            initialIntervalMs: 1L,
            maxIntervalMs: 50L,
            maxElapsedTimeMs: 100L,
            exponent: 1.1
        ),
        retryConnectionErrors: false
    ),
    bearer: "<YOUR API ACCESS TOKEN>"
);

var res = await sdk.Accounts.GetAsync();

// handle response

Error Handling

ClientException is the base exception class for all HTTP error responses. It has the following properties:

Some exceptions in this SDK include an additional Payload field, which will contain deserialized custom error data when present. Possible exceptions are listed in the Error Classes section.

Example

using Postivo;
using Postivo.Models.Components;
using Postivo.Models.Errors;

var sdk = new Client(bearer: "<YOUR API ACCESS TOKEN>");

try
{
    var res = await sdk.Accounts.GetAsync();

    // handle response
}
catch (ClientException ex)  // all SDK exceptions inherit from ClientException
{
    // ex.ToString() provides a detailed error message
    System.Console.WriteLine(ex);

    // Base exception fields
    HttpRequestMessage request = ex.Request;
    HttpResponseMessage response = ex.Response;
    var statusCode = (int)response.StatusCode;
    var responseBody = ex.Body;

    if (ex is Models.Errors.ErrorResponse) // different exceptions may be thrown depending on the method
    {
        // Check error data fields
        Models.Errors.ErrorResponsePayload payload = ex.Payload;
        string Type = payload.Type;
        long Status = payload.Status;
        // ...
    }

    // An underlying cause may be provided
    if (ex.InnerException != null)
    {
        Exception cause = ex.InnerException;
    }
}
catch (OperationCanceledException ex)
{
    // CancellationToken was cancelled
}
catch (System.Net.Http.HttpRequestException ex)
{
    // Check ex.InnerException for Network connectivity errors
}

Error Classes

Primary exceptions:

• ClientException: The base class for HTTP error responses.
  • ErrorResponse: Problem Details object (RFC 9457) describing the error.

<details><summary>Less common exceptions (2)</summary>

• System.Net.Http.HttpRequestException: Network connectivity error. For more details about the underlying cause, inspect the ex.InnerException.

• Inheriting from ClientException:

  • ResponseValidationError: Thrown when the response data could not be deserialized into the expected type. </details>

Server Selection

Select Server by Name

You can override the default server globally by passing a server name to the server: string optional parameter when initializing the SDK client instance. The selected server will then be used as the default on the operations that use it. This table lists the names associated with the available servers:

Example

using Postivo;
using Postivo.Models.Components;

var sdk = new Client(
    server: SDKConfig.Server.Sandbox,
    bearer: "<YOUR API ACCESS TOKEN>"
);

var res = await sdk.Accounts.GetAsync();

// handle response

Override Server URL Per-Client

The default server can also be overridden globally by passing a URL to the serverUrl: string optional parameter when initializing the SDK client instance. For example:

using Postivo;
using Postivo.Models.Components;

var sdk = new Client(
    serverUrl: "https://api.postivo.pl/rest/v1",
    bearer: "<YOUR API ACCESS TOKEN>"
);

var res = await sdk.Accounts.GetAsync();

// handle response

Custom HTTP Client

The C# SDK makes API calls using an ISpeakeasyHttpClient that wraps the native HttpClient. This client provides the ability to attach hooks around the request lifecycle that can be used to modify the request or handle errors and response.

The ISpeakeasyHttpClient interface allows you to either use the default SpeakeasyHttpClient that comes with the SDK, or provide your own custom implementation with customized configuration such as custom message handlers, timeouts, connection pooling, and other HTTP client settings.

The following example shows how to create a custom HTTP client with request modification and error handling:

using Postivo;
using Postivo.Utils;
using System.Net.Http;
using System.Threading;
using System.Threading.Tasks;

// Create a custom HTTP client
public class CustomHttpClient : ISpeakeasyHttpClient
{
    private readonly ISpeakeasyHttpClient _defaultClient;

    public CustomHttpClient()
    {
        _defaultClient = new SpeakeasyHttpClient();
    }

    public async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken? cancellationToken = null)
    {
        // Add custom header and timeout
        request.Headers.Add("x-custom-header", "custom value");
        request.Headers.Add("x-request-timeout", "30");
        
        try
        {
            var response = await _defaultClient.SendAsync(request, cancellationToken);
            // Log successful response
            Console.WriteLine($"Request successful: {response.StatusCode}");
            return response;
        }
        catch (Exception error)
        {
            // Log error
            Console.WriteLine($"Request failed: {error.Message}");
            throw;
        }
    }

    public void Dispose()
    {
        _httpClient?.Dispose();
        _defaultClient?.Dispose();
    }
}

// Use the custom HTTP client with the SDK
var customHttpClient = new CustomHttpClient();
var sdk = new Client(client: customHttpClient);

<details> <summary>You can also provide a completely custom HTTP client with your own configuration:</summary>

using Postivo.Utils;
using System.Net.Http;
using System.Threading;
using System.Threading.Tasks;

// Custom HTTP client with custom configuration
public class AdvancedHttpClient : ISpeakeasyHttpClient
{
    private readonly HttpClient _httpClient;

    public AdvancedHttpClient()
    {
        var handler = new HttpClientHandler()
        {
            MaxConnectionsPerServer = 10,
            // ServerCertificateCustomValidationCallback = customCertValidation, // Custom SSL validation if needed
        };

        _httpClient = new HttpClient(handler)
        {
            Timeout = TimeSpan.FromSeconds(30)
        };
    }

    public async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken? cancellationToken = null)
    {
        return await _httpClient.SendAsync(request, cancellationToken ?? CancellationToken.None);
    }

    public void Dispose()
    {
        _httpClient?.Dispose();
    }
}

var sdk = Client.Builder()
    .WithClient(new AdvancedHttpClient())
    .Build();

</details>

<details> <summary>For simple debugging, you can enable request/response logging by implementing a custom client:</summary>

public class LoggingHttpClient : ISpeakeasyHttpClient
{
    private readonly ISpeakeasyHttpClient _innerClient;

    public LoggingHttpClient(ISpeakeasyHttpClient innerClient = null)
    {
        _innerClient = innerClient ?? new SpeakeasyHttpClient();
    }

    public async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken? cancellationToken = null)
    {
        // Log request
        Console.WriteLine($"Sending {request.Method} request to {request.RequestUri}");
        
        var response = await _innerClient.SendAsync(request, cancellationToken);
        
        // Log response
        Console.WriteLine($"Received {response.StatusCode} response");
        
        return response;
    }

    public void Dispose() => _innerClient?.Dispose();
}

var sdk = new Client(client: new LoggingHttpClient());

</details>

The SDK also provides built-in hook support through the SDKConfiguration.Hooks system, which automatically handles BeforeRequestAsync, AfterSuccessAsync, and AfterErrorAsync hooks for advanced request lifecycle management.