How to Send HTTP Requests (GET, POST, PUT, DELETE) in Unity using C#?

Use C# to send HTTP requests (GET, POST, PUT, DELETE) in Unity

Unity provides powerful features to simplify sending HTTP requests, including GET and POST requests. Here's a complete guide on how to handle these requests efficiently:

GET request:

Implementing GET requests using UnityWebRequest is very simple:

<code class="language-csharp">UnityWebRequest uwr = UnityWebRequest.Get(uri);
yield return uwr.SendWebRequest();
if (uwr.isNetworkError) Debug.Log("错误: " + uwr.error);
else Debug.Log("接收: " + uwr.downloadHandler.text);</code>

POST request containing form data:

Sending form data requires an WWWForm instance:

<code class="language-csharp">WWWForm form = new WWWForm();
form.AddField("param1", "value1");
UnityWebRequest uwr = UnityWebRequest.Post(url, form);
yield return uwr.SendWebRequest();</code>

POST request containing JSON data:

For JSON based requests:

<code class="language-csharp">string json = JsonUtility.ToJson(dataObject);
var uwr = new UnityWebRequest(url, "POST");
byte[] jsonToSend = System.Text.UTF8Encoding.UTF8.GetBytes(json);
uwr.uploadHandler = new UploadHandlerRaw(jsonToSend);
uwr.downloadHandler = new DownloadHandlerBuffer();
uwr.SetRequestHeader("Content-Type", "application/json");
yield return uwr.SendWebRequest();</code>

Multipart form data and files:

<code class="language-csharp">List<IMultipartFormSection> formData = new List<IMultipartFormSection>();
formData.Add(new MultipartFormDataSection("name=John&age=30"));
formData.Add(new MultipartFormFileSection("myFile", "myfile.txt"));
UnityWebRequest uwr = UnityWebRequest.Post(url, formData);
yield return uwr.SendWebRequest();</code>

HTTP methods other than GET and POST:

• PUT:

  <code class="language-csharp">  byte[] dataToPut = System.Text.Encoding.UTF8.GetBytes("数据");
    UnityWebRequest uwr = UnityWebRequest.Put(url, dataToPut);
    yield return uwr.SendWebRequest();</code>

• DELETE:

  <code class="language-csharp">  UnityWebRequest uwr = UnityWebRequest.Delete(url);
    yield return uwr.SendWebRequest();</code>

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