UploadHandlerRaw

Description

A general-purpose UploadHandler subclass, using a native-code memory buffer.

This subclass copies input data into a native-code memory buffer at construction time, and transmits that data verbatim as HTTP request body data.

using System;
using System.Text;
using System.Collections;
using UnityEngine;
using UnityEngine.Networking;

public class ApiClient : MonoBehaviour
{
    // Example endpoint and auth token – replace with your own
    [SerializeField] private string baseUrl = "https://api.example.com";
    [SerializeField] private string authToken = "Bearer YOUR_TOKEN";

    // Example payload data structure
    [Serializable]
    public class PlayerStats
    {
        public string playerId;
        public int score;
        public int level;
        public string region;
    }

    private void Start()
    {
        var stats = new PlayerStats
        {
            playerId = SystemInfo.deviceUniqueIdentifier,
            score = 12345,
            level = 7,
            region = "NA"
        };

        // Send JSON payload
        StartCoroutine(PostJson("/v1/stats", stats, onSuccess: response =>
        {
            Debug.Log($"Server response: {response}");
        },
        onError: error =>
        {
            Debug.LogError($"Upload failed: {error}");
        }));

        // Send raw binary payload (example)
        var binaryData = GenerateMockBinary();
        StartCoroutine(PostBinary("/v1/upload-binary", binaryData, "application/octet-stream"));
    }

    private IEnumerator PostJson(string path, object payload, Action<string> onSuccess, Action<string> onError)
    {
        string url = $"{baseUrl}{path}";

        // Serialize to JSON
        string json = JsonUtility.ToJson(payload);
        byte[] bodyRaw = Encoding.UTF8.GetBytes(json);

        using (var request = new UnityWebRequest(url, UnityWebRequest.kHttpVerbPOST))
        {
            // UploadHandlerRaw takes a byte[] buffer; it won’t copy data after construction,
            // so do not modify bodyRaw until request completes.
            request.uploadHandler = new UploadHandlerRaw(bodyRaw);
            request.uploadHandler.contentType = "application/json"; // sets Content-Type

            // Always set a DownloadHandler to read server response
            request.downloadHandler = new DownloadHandlerBuffer();

            // Optional headers
            request.SetRequestHeader("Authorization", authToken);
            request.SetRequestHeader("Accept", "application/json");
            // If your server requires a custom header:
            request.SetRequestHeader("X-Client-Version", Application.version);

            // Reasonable timeout (seconds)
            request.timeout = 15;

            // You can allow chunked transfer if server supports it
            request.chunkedTransfer = false; // default false; set true for streaming large bodies

            // Send request
            yield return request.SendWebRequest();

            // Handle result
            if (request.result == UnityWebRequest.Result.Success)
            {
                string responseText = request.downloadHandler.text;
                onSuccess?.Invoke(responseText);
            }
            else
            {
                // Build a detailed error message
                string errorMsg = $"HTTP {(int)request.responseCode} {request.error}";
                string serverBody = request.downloadHandler != null ? request.downloadHandler.text : "";
                if (!string.IsNullOrEmpty(serverBody))
                {
                    errorMsg += $" | Body: {serverBody}";
                }
                onError?.Invoke(errorMsg);
            }
        }
    }

    private IEnumerator PostBinary(string path, byte[] data, string contentType)
    {
        string url = $"{baseUrl}{path}";

        using (var request = new UnityWebRequest(url, UnityWebRequest.kHttpVerbPOST))
        {
            request.uploadHandler = new UploadHandlerRaw(data);
            request.uploadHandler.contentType = contentType; // e.g., "application/octet-stream"
            request.downloadHandler = new DownloadHandlerBuffer();

            request.SetRequestHeader("Authorization", authToken);
            request.SetRequestHeader("Accept", "*/*");
            request.timeout = 30;

            yield return request.SendWebRequest();

            if (request.result == UnityWebRequest.Result.Success)
            {
                Debug.Log($"Binary upload OK. Response: {request.downloadHandler.text}");
            }
            else
            {
                Debug.LogError($"Binary upload failed: {(int)request.responseCode} {request.error}");
            }
        }
    }

    private byte[] GenerateMockBinary()
    {
        // Example: create a simple byte array. In practice, this could be a file, image, or custom buffer.
        var buffer = new byte[256];
        for (int i = 0; i < buffer.Length; i++)
            buffer[i] = (byte)(i % 256);
        return buffer;
    }
}

Constructors

Inherited Members