はじめに

UnityでTHETA V操作アプリを作成しようとしたところ変なところで引っかかったのでメモ

現象

UnityWebRequestでTHETA V（v2.41.1）を操作しようとしたところ以下の問題が起きた
- GETは成功する
- POSTがAndroid（Galaxy8、OculusGo）で失敗する（Macでは動作）
  - 失敗時は、Request Time Outになる

原因

UnityWebRequestのPOST実行時、Android版はヘッダに「Expect: 100-continue」が付くため

対策

「Expect: 100-continue」を外す
- UnityWebRequest.useHttpContinue = false を設定

実際のコード

ThetaAccessControl.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.Networking;
using System;
using System.Text;
using System.IO;


public class ThetaAccessControl {

	public string baseUrl = "http://192.168.1.1";

    public int requestTimeout = 5;

    void Start() {
    }
 
    public IEnumerator Get(string url, string key, UnityAction<string, string, byte[]> action, UnityAction<string, UnityWebRequest> error) {
        var request = UnityWebRequest.Get(url);
        request.timeout = requestTimeout;

        // リクエスト送信
        yield return request.SendWebRequest();
 
        // 通信エラーチェック
        if (request.isNetworkError) {
            if (error != null) {
                error(key, request);
            }
        } else {
            if (request.responseCode == 200) {
                if(action != null) {
                    byte[] results = request.downloadHandler.data;
	    			action(key, url, results);
                }
            } else {
                if (error != null) {
                    error(key, request);
                }
            }
        }
    }
    public IEnumerator Post(string url, string bodyJsonString, string key, UnityAction<string, string, byte[]> action, UnityAction<string, UnityWebRequest> error) {
        var request = new UnityWebRequest(url, "POST");
		if (bodyJsonString != "") {
	        byte[] bodyRaw = Encoding.UTF8.GetBytes(bodyJsonString);
	        request.uploadHandler = (UploadHandler) new UploadHandlerRaw(bodyRaw);
		}
        request.downloadHandler = (DownloadHandler) new DownloadHandlerBuffer();
        request.SetRequestHeader("Content-Type", "application/json");
        request.timeout = requestTimeout;
        request.useHttpContinue = false;

        yield return request.SendWebRequest();

        if (request.isNetworkError) {
            if (error != null) {
                error(key, request);
            } 
        } else {
            if (action != null) {
                string result = request.downloadHandler.text;
                byte[] resultByte = request.downloadHandler.data;
                action(key, result, resultByte);
            }
        }
    }
}

参考

http://d.hatena.ne.jp/naga_sawa/20101114/1289709797

備考

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