From 215a4dd662e23e99cbe4fcd82e031a38e7b2f347 Mon Sep 17 00:00:00 2001
From: leejinho <lilis7575@gmail.com>
Date: Thu, 13 Feb 2020 17:24:00 +0900
Subject: [PATCH] =?UTF-8?q?fake=20=EC=9D=B4=EB=AF=B8=EC=A7=80,=20=EB=8F=99?=
 =?UTF-8?q?=EC=98=81=EC=83=81=20=ED=8C=8C=EC=9D=BC=20=EA=B2=80=EC=A6=9D?=
 =?UTF-8?q?=ED=95=98=EB=8A=94=20=EB=A1=9C=EC=A7=81=20(=EC=A4=91=EA=B0=84?=
 =?UTF-8?q?=EB=8B=A8=EA=B3=84=20=EA=B0=9C=EB=B0=9C=EC=A4=91)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../src/lib/services/common-api.service.ts    | 59 +++++++++++++++++++
 .../components/messages.component.ts          |  4 ++
 2 files changed, 63 insertions(+)

diff --git a/projects/ucap-webmessenger-api-common/src/lib/services/common-api.service.ts b/projects/ucap-webmessenger-api-common/src/lib/services/common-api.service.ts
index 2490f24c..e6cb24ad 100644
--- a/projects/ucap-webmessenger-api-common/src/lib/services/common-api.service.ts
+++ b/projects/ucap-webmessenger-api-common/src/lib/services/common-api.service.ts
@@ -223,6 +223,65 @@ export class CommonApiService {
     };
   }
 
+  public mimeCheckForImageAndVideoFiles(files: File[]) {
+    files.forEach(file => {
+      console.log(file);
+      const fileReader = new FileReader();
+      fileReader.onloadend = () => {
+        const arr = new Uint8Array(fileReader.result as ArrayBuffer).subarray(
+          0,
+          4
+        );
+        let header = '';
+        for (let i = 0; i < arr.length; i++) {
+          header += arr[i].toString(16);
+        }
+        console.log('File header: ' + header);
+
+        // Check the file signature against known types
+        var type = 'unknown';
+        // http://forensic-proof.com/archives/300?ckattempt=1
+
+        if (header.startsWith('89504e47')) {
+          // 89504E470D0A1A0A
+          type = 'image/png';
+        } else if (header.startsWith('47494638')) {
+          // 474946383761
+          // 474946383961
+          type = 'image/gif';
+        } else if (header.startsWith('ffd8ffe')) {
+          // ffd8ffe0
+          // ffd8ffe1
+          // ffd8ffe2
+          // ffd8ffe8
+          type = 'image/jpeg';
+        } else if (header.startsWith('424d')) {
+          type = 'image/bmp';
+        } else if (header.startsWith('4d4d') || header.startsWith('4949')) {
+          type = 'image/tiff';
+        } else if (header.startsWith('4F676753')) {
+          // 4F67675300020000
+          type = 'image/ogg';
+        } else if (header.startsWith('38425053')) {
+          // 38 42 50 53
+          type = 'image/psd';
+        } else if (header.startsWith('25504446')) {
+          // 38 42 50 53
+          type = 'image/ai';
+        } else if (header.startsWith('52494646')) {
+          // avi
+          type = 'video/x-msvideo';
+        } else if (header.startsWith('00000018')) {
+          // 0000001866747970
+          type = 'video/x-msvideo';
+        }
+
+        console.log('type', type);
+      };
+      fileReader.readAsArrayBuffer(file);
+    });
+  }
+
   public fileTalkShare(
     req: FileTalkShareRequest
   ): Observable<FileTalkShareResponse> {
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.ts b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.ts
index f3820a0d..1159d8dc 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.ts
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.ts
@@ -1107,6 +1107,10 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
       }
     }
 
+    // this.commonApiService.mimeCheckForImageAndVideoFiles(
+    //   fileUploadItems.map(fui => fui.file)
+    // );
+
     const checkExt = this.commonApiService.acceptableExtensionForFileTalk(
       fileUploadItems.map(fui => FileUtil.getExtension(fui.file.name))
     );