Hat Tip 1 3 – Http Web Services Client Portal

1. Hat Tip 1 3 – Http Web Services Client Portal Access
2. Hat Tip 1 3 – Http Web Services Client Portal Ccisd
3. Hat Tip 1 3 – Http Web Services Client Portal
4. Hat Tip 1 3 – Http Web Services Client Portal Login

by Mike Wasson and Rick Anderson

Download Completed Project. Download instructions.

This tutorial shows how to call a web API from a .NET application, using System.Net.Http.HttpClient.

In this tutorial, a client app is written that consumes the following web API:

I am new to Spring and I need my Java app to connect to another API over HTTP (JSON, RESTful). Does the Spring Framework have anything like a JSON HTTP Rest Client? What do Spring developers usuall. Right-click this file and select Web Services Generate Client to start the Web Service Client Proxy wizard. On the first page of the wizard, you can choose all defaults except for the client project. You should choose a project other than the project that contains the Web service. SAP BusinessObjects RESTful Web Service SDK User Guide for Web Intelligence and the BI Semantic Layer. This guide provides conceptual and reference information on the BI Semantic Layer RESTful Web Service SDK and the Web Intelligence RESTful Web Service SDK. Last updated for 4.2 Support Package 4. Common Web Services Usage Portal Server Web Service Provider #1 Web Service Provider #2 SQL DB Mainframe Application Browser Client Browser Client HTTP Get/Post SOAP ODBC Unknown Web Service Consumer SOAP.

To learn how to implement this API with ASP.NET Web API, see Creating a Web API that Supports CRUD Operations.

For simplicity, the client application in this tutorial is a Windows console application. HttpClient is also supported for Windows Phone and Windows Store apps. For more information, see Writing Web API Client Code for Multiple Platforms Using Portable Libraries

NOTE: If you pass base URLs and relative URIs as hard-coded values, be mindful of the rules for utilizing the HttpClient API. The HttpClient.BaseAddress property should be set to an address with a trailing forward slash (/). For example, when passing hard-coded resource URIs to the HttpClient.GetAsync method, don't include a leading forward slash. To get a Product by ID:

1. Set client.BaseAddress = new Uri('https://localhost:5001/');
2. Request a Product. For example, client.GetAsync('api/products/4');.

Create the Console Application

In Visual Studio, create a new Windows console app named HttpClientSample and paste in the following code:

The preceding code is the complete client app.

RunAsync runs and blocks until it completes. Most HttpClient methods are async, because they perform network I/O. All of the async tasks are done inside RunAsync. Normally an app doesn't block the main thread, but this app doesn't allow any interaction.

Install the Web API Client Libraries

Use NuGet Package Manager to install the Web API Client Libraries package.

From the Tools menu, select NuGet Package Manager > Package Manager Console. In the Package Manager Console (PMC), type the following command:

Install-Package Microsoft.AspNet.WebApi.Client

The preceding command adds the following NuGet packages to the project:

• Microsoft.AspNet.WebApi.Client
• Newtonsoft.Json

Netwonsoft.Json (also known as Json.NET) is a popular high-performance JSON framework for .NET.

Hat Tip 1 3 – Http Web Services Client Portal Access

Add a Model Class

Examine the Product class:

This class matches the data model used by the web API. An app can use HttpClient to read a Product instance from an HTTP response. The app doesn't have to write any deserialization code.

Create and Initialize HttpClient

Examine the static HttpClient property:

HttpClient is intended to be instantiated once and reused throughout the life of an application. The following conditions can result in SocketException errors:

• Creating a new HttpClient instance per request.
• Server under heavy load.

Creating a new HttpClient Veertu 1 0 13 download free. instance per request can exhaust the available sockets.

The following code initializes the HttpClient instance:

The preceding code:

Hat Tip 1 3 – Http Web Services Client Portal Ccisd

• Sets the base URI for HTTP requests. Change the port number to the port used in the server app. The app won't work unless port for the server app is used.
• Sets the Accept header to 'application/json'. Setting this header tells the server to send data in JSON format.

Send a GET request to retrieve a resource

The following code sends a GET request for a product:

The GetAsync method sends the HTTP GET request. When the method completes, it returns an HttpResponseMessage that contains the HTTP response. If the status code in the response is a success code, the response body contains the JSON representation of a product. Call ReadAsAsync to deserialize the JSON payload to a Product instance. The ReadAsAsync method is asynchronous because the response body can be arbitrarily large.

HttpClient does not throw an exception when the HTTP response contains an error code. Instead, the IsSuccessStatusCode property is false if the status is an error code. If you prefer to treat HTTP error codes as exceptions, call HttpResponseMessage.EnsureSuccessStatusCode on the response object. EnsureSuccessStatusCode throws an exception if the status code falls outside the range 200–299. Note that HttpClient can throw exceptions for other reasons — for example, if the request times out.

Media-Type Formatters to Deserialize

When ReadAsAsync is called with no parameters, it uses a default set of media formatters to read the response body. The default formatters support JSON, XML, and Form-url-encoded data.

Instead of using the default formatters, you can provide a list of formatters to the ReadAsAsync method. Using a list of formatters is useful if you have a custom media-type formatter:

For more information, see Media Formatters in ASP.NET Web API 2

Sending a POST Request to Create a Resource

The following code sends a POST request that contains a Product instance in JSON format:

The PostAsJsonAsync method:

• Serializes an object to JSON.
• Sends the JSON payload in a POST request.

If the request succeeds:

• It should return a 201 (Created) response.
• The response should include the URL of the created resources in the Location header.

The PostAsJsonAsync method:

• Serializes an object to JSON.
• Sends the JSON payload in a POST request.

If the request succeeds:

• It should return a 201 (Created) response.
• The response should include the URL of the created resources in the Location header.

Sending a PUT Request to Update a Resource

The following code sends a PUT request to update a product:

The PutAsJsonAsync method works like PostAsJsonAsync, except that it sends a PUT request instead of POST.

Sending a DELETE Request to Delete a Resource

The following code sends a DELETE request to delete a product:

Hat Tip 1 3 – Http Web Services Client Portal

Like GET, a DELETE request does not have a request body. You don't need to specify JSON or XML format with DELETE.

Test the sample

To test the client app:

Hat Tip 1 3 – Http Web Services Client Portal Login

1. Download and run the server app. Download instructions. Verify the server app is working. For example, http://localhost:64195/api/products should return a list of products.

2. Set the base URI for HTTP requests. Change the port number to the port used in the server app.

3. Run the client app. The following output is produced: