IOSUnityアプリでS３の読み込み

UnityでビルドしたアプリでAWSのS3を読み込みたい

unityでIOSアプリを製作しています。
下記のサンプルコードを使用してS３からオブジェクトを読み込みそれをTextに表示させています。
AWS Mobile SDK for Unity Samples
PCのUnity上では、S３を読み込み下のソースコード内のResultTextに表示できています。
しかしそれをIOSアプリとしてビルドし、iphoneで動かすと読み込めまなく、ResulTextに表示できません。
ちなみにIdentityPoolIdやCognitoIdentityRegionなどはスクリプト内で指定しています。

該当のソースコード

C#
1ソースコード
2
3using UnityEngine;
4using System.Collections;
5using UnityEngine.UI;
6using Amazon.S3;
7using Amazon.S3.Model;
8using Amazon.Runtime;
9using System.IO;
10using System;
11using Amazon.S3.Util;
12using System.Collections.Generic;
13using Amazon.CognitoIdentity;
14using Amazon;
15
16namespace AWSSDK.Examples
17{
18    public class S3Example : MonoBehaviour
19    {
20        string IdentityPoolId = "";
21        string CognitoIdentityRegion = "";
22        private RegionEndpoint _CognitoIdentityRegion
23        {
24            get { return RegionEndpoint.GetBySystemName(CognitoIdentityRegion); }
25        }
26        string S3Region = "";
27        private RegionEndpoint _S3Region
28        {
29            get { return RegionEndpoint.GetBySystemName(S3Region); }
30        }
31        string S3BucketName = "";
32        string SampleFileName = "";
33        public Button GetBucketListButton = null;
34        public Button PostBucketButton = null;
35        public Button GetObjectsListButton = null;
36        public Button DeleteObjectButton = null;
37        public Button GetObjectButton = null;
38        public Text ResultText = null;
39
40        void Start()
41        {
42            UnityInitializer.AttachToGameObject(this.gameObject);
43
44            AWSConfigs.HttpClient = AWSConfigs.HttpClientOption.UnityWebRequest;
45
46            GetObjectButton.onClick.AddListener(() => { GetObject(); });
47        }
48
49        #region private members
50
51        private IAmazonS3 _s3Client;
52        private AWSCredentials _credentials;
53
54        private AWSCredentials Credentials
55        {
56            get
57            {
58                if (_credentials == null)
59                    _credentials = new CognitoAWSCredentials(IdentityPoolId, _CognitoIdentityRegion);
60                return _credentials;
61            }
62        }
63
64        private IAmazonS3 Client
65        {
66            get
67            {
68                if (_s3Client == null)
69                {
70                    _s3Client = new AmazonS3Client(Credentials, _S3Region);
71                }
72                //test comment
73                return _s3Client;
74            }
75        }
76
77        #endregion
78
79        
80        /// <summary>
81        /// Get Object from S3 Bucket
82        /// </summary>
83        private void GetObject()
84        {
85
86            ResultText.text = string.Format("fetching {0} from bucket {1}", SampleFileName, S3BucketName);
87            Client.GetObjectAsync(S3BucketName, SampleFileName, (responseObj) =>
88            {
89                
90                string data = null;
91                var response = responseObj.Response;
92                if (response.ResponseStream != null)
93                {
94                    Debug.Log(data+"aiueo");
95                    using (StreamReader reader = new StreamReader(response.ResponseStream))
96                    {
97                        data = reader.ReadToEnd();
98                        Debug.Log(data);
99                    }
100
101                    ResultText.text += "\n";
102                    ResultText.text += data;
103
104                }
105            });
106        }
107
108
109        /// <summary>
110        /// Get Objects from S3 Bucket
111        /// </summary>
112        public void GetObjects()
113        {
114            ResultText.text = "Fetching all the Objects from " + S3BucketName;
115
116            var request = new ListObjectsRequest()
117            {
118                BucketName = S3BucketName
119            };
120
121            Client.ListObjectsAsync(request, (responseObject) =>
122            {
123                ResultText.text += "\n";
124                if (responseObject.Exception == null)
125                {
126                    ResultText.text += "Got Response \nPrinting now \n";
127                    responseObject.Response.S3Objects.ForEach((o) =>
128                    {
129                        ResultText.text += string.Format("{0}\n", o.Key);
130                    });
131                }
132                else
133                {
134                    ResultText.text += "Got Exception \n";
135                }
136            });
137        }
138
139        #region helper methods
140
141        private string GetFileHelper()
142        {
143            var fileName = SampleFileName;
144
145            if (!File.Exists(Application.persistentDataPath + Path.DirectorySeparatorChar + fileName))
146            {
147                var streamReader = File.CreateText(Application.persistentDataPath + Path.DirectorySeparatorChar + fileName);
148                streamReader.WriteLine("This is a sample s3 file uploaded from unity s3 sample");
149                streamReader.Close();
150            }
151            return fileName;
152        }
153
154        private string GetPostPolicy(string bucketName, string key, string contentType)
155        {
156            bucketName = bucketName.Trim();
157
158            key = key.Trim();
159            // uploadFileName cannot start with /
160            if (!string.IsNullOrEmpty(key) && key[0] == '/')
161            {
162                throw new ArgumentException("uploadFileName cannot start with / ");
163            }
164
165            contentType = contentType.Trim();
166
167            if (string.IsNullOrEmpty(bucketName))
168            {
169                throw new ArgumentException("bucketName cannot be null or empty. It's required to build post policy");
170            }
171            if (string.IsNullOrEmpty(key))
172            {
173                throw new ArgumentException("uploadFileName cannot be null or empty. It's required to build post policy");
174            }
175            if (string.IsNullOrEmpty(contentType))
176            {
177                throw new ArgumentException("contentType cannot be null or empty. It's required to build post policy");
178            }
179
180            string policyString = null;
181            int position = key.LastIndexOf('/');
182            if (position == -1)
183            {
184                policyString = "{\"expiration\": \"" + DateTime.UtcNow.AddHours(24).ToString("yyyy-MM-ddTHH:mm:ssZ") + "\",\"conditions\": [{\"bucket\": \"" +
185                    bucketName + "\"},[\"starts-with\", \"$key\", \"" + "\"],{\"acl\": \"private\"},[\"eq\", \"$Content-Type\", " + "\"" + contentType + "\"" + "]]}";
186            }
187            else
188            {
189                policyString = "{\"expiration\": \"" + DateTime.UtcNow.AddHours(24).ToString("yyyy-MM-ddTHH:mm:ssZ") + "\",\"conditions\": [{\"bucket\": \"" +
190                    bucketName + "\"},[\"starts-with\", \"$key\", \"" + key.Substring(0, position) + "/\"],{\"acl\": \"private\"},[\"eq\", \"$Content-Type\", " + "\"" + contentType + "\"" + "]]}";
191            }
192
193            return policyString;
194        }
195
196    }
197
198        #endregion
199}
200