How to Decompress GZip-Encoded JSON Data from an API Using HTTPClient in WCF?

Use HTTPClient to decompress GZip stream from API

Question:

How to decompress GZip encoded JSON data from API using HTTPClient in WCF service application?

Solution:

To decompress the GZip stream and read the JSON data, follow these steps:

1. Use the automatic decompression function to instantiate HttpClient:

   <code class="language-csharp">HttpClientHandler handler = new HttpClientHandler()
   {
       AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate
   };
   using (var client = new HttpClient(handler)) {
       //您的代码
   }</code>

   Note: If you are using .NET Core 2.1 or higher, consider using IHttpClientFactory.

2. Establish connection and get response:

   Replace the existing getData method with the following:

   <code class="language-csharp">public string getData(string foo)
   {
       string url = ""; // 请替换为您的API地址
       using (var client = new HttpClient(handler)) // 使用支持解压的HttpClient
       {
           client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
           HttpResponseMessage response = client.GetAsync(url + foo).Result;
           string responseJsonContent = response.Content.ReadAsStringAsync().Result;
           return responseJsonContent;
       }
   }</code>

After completing these steps, the getData method will return the decompressed JSON data (in string form), which you can store to a database or process further.

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