{"id":25556,"date":"2024-10-26T13:50:54","date_gmt":"2024-10-26T13:50:54","guid":{"rendered":"http:\/\/atmokpo.com\/w\/?p=25556"},"modified":"2024-11-26T08:01:23","modified_gmt":"2024-11-26T08:01:23","slug":"%ed%94%8c%eb%9f%ac%ed%84%b0-%ea%b0%95%ec%a2%8c-14-7-stream%ea%b3%bc-streambuilder","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/25556\/","title":{"rendered":"\ud50c\ub7ec\ud130 \uac15\uc88c: 14.7 Stream\uacfc StreamBuilder"},"content":{"rendered":"<p>\ud50c\ub7ec\ud130\ub294 \ube44\ub3d9\uae30 \ud504\ub85c\uadf8\ub798\ubc0d\uc744 \uc9c0\uc6d0\ud558\ub294 \uac15\ub825\ud55c \ud504\ub808\uc784\uc6cc\ud06c\uc785\ub2c8\ub2e4. \uadf8 \uc911\uc5d0\uc11c\ub3c4 Stream\uacfc StreamBuilder\ub294 \ub370\uc774\ud130\uc758 \ud750\ub984\uc744 \ub2e4\ub8e8\uae30 \uc704\ud574 \ud544\uc218\uc801\uc778 \uc694\uc18c\uc785\ub2c8\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294 Stream\uacfc StreamBuilder\uc758 \uac1c\ub150, \uc0ac\uc6a9\ubc95 \ubc0f \uc2e4\uc81c \uc608\uc81c\ub97c \ud1b5\ud574 \uc774 \ub450 \uac1c\ub150\uc744 \uae4a\uc774 \uc788\uac8c \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>1. Stream\uc774\ub780?<\/h2>\n<p>Stream\uc740 \ube44\ub3d9\uae30\ub85c \ub370\uc774\ud130\ub97c \uc804\ub2ec\ud558\ub294 \ubc18\uc751\ud615 \ud504\ub85c\uadf8\ub798\ubc0d\uc758 \uac1c\ub150\uc785\ub2c8\ub2e4. \ub370\uc774\ud130\uac00 \ubc1c\uc0dd\ud560 \ub54c\ub9c8\ub2e4 \uc774\ub97c \ubc1b\uc544\uc11c \ucc98\ub9ac\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc11c\ubc84\uc5d0\uc11c \uc9c0\uc18d\uc801\uc73c\ub85c \ub370\uc774\ud130\ub97c \ubc1b\uc544\uc624\uac70\ub098, \uc0ac\uc6a9\uc790 \uc785\ub825\uc744 \uc2e4\uc2dc\uac04\uc73c\ub85c \uac10\uc9c0\ud558\uc5ec \ucc98\ub9ac\ud558\ub294 \ub4f1\uc758 \uc0c1\ud669\uc5d0\uc11c Stream\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>1.1 Stream\uc758 \uae30\ubcf8 \uac1c\ub150<\/h3>\n<p>Stream\uc740 \uc77c\ub828\uc758 \ube44\ub3d9\uae30 \uc774\ubca4\ud2b8\ub97c \ubc1c\uc0dd\uc2dc\ud0a4\uba70, \uc774\ub7ec\ud55c \uc774\ubca4\ud2b8\ub97c \uc18c\ube44\ud558\ub294 &#8216;\ub9ac\uc2a4\ub108&#8217;\uac00 \uc874\uc7ac\ud569\ub2c8\ub2e4. Stream\uc740 \uc5ec\ub7ec \uac00\uc9c0 \uc720\ud615\uc774 \uc788\uc73c\uba70, \uac00\uc7a5 \uc77c\ubc18\uc801\uc778 \ub450 \uac00\uc9c0\ub294 \ub2e8\uc77c \uac12\ub9cc \ubc1c\uc0dd\uc2dc\ud0a4\ub294 <strong>Future<\/strong>\uc640 \uc5ec\ub7ec \uac12\uc744 \ubc1c\uc0dd\uc2dc\ud0a4\ub294 <strong>Stream<\/strong>\uc785\ub2c8\ub2e4.<\/p>\n<h3>1.2 Stream\uc758 \uc8fc\uc694 \ud2b9\uc9d5<\/h3>\n<ul>\n<li>\ub370\uc774\ud130 \ud750\ub984: Stream\uc740 \ub370\uc774\ud130\uac00 \uc0dd\uc131\ub420 \ub54c\ub9c8\ub2e4 \uc774\ub97c \uc804\ub2ec\ud569\ub2c8\ub2e4.<\/li>\n<li>\ube44\ub3d9\uae30 \ucc98\ub9ac: Stream\uc740 \ube44\ub3d9\uae30\uc801\uc73c\ub85c \ub370\uc774\ud130\ub97c \ucc98\ub9ac\ud558\uc5ec UI\ub97c \ub354 \ubd80\ub4dc\ub7fd\uac8c \uc720\uc9c0\ud569\ub2c8\ub2e4.<\/li>\n<li>\ub9ac\uc2a4\ub108: Stream\uc740 \ub370\uc774\ud130\ub97c \uc18c\ube44\ud560 \ub9ac\uc2a4\ub108\ub97c \ud544\uc694\ub85c \ud569\ub2c8\ub2e4.<\/li>\n<li>\ub2e4\uc591\ud55c \uc18c\uc2a4: Stream\uc740 \uc5ec\ub7ec \ub370\uc774\ud130 \uc18c\uc2a4\ub85c\ubd80\ud130 \ub370\uc774\ud130\ub97c \uc218\uc2e0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc6f9 \uc18c\ucf13, HTTP \uc694\uccad \ub610\ub294 \uc0ac\uc6a9\uc790 \uc785\ub825 \ub4f1\uc785\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h2>2. StreamBuilder\ub780?<\/h2>\n<p>StreamBuilder\ub294 Flutter\uc758 \uc704\uc82f\uc73c\ub85c, Stream\uc758 \ub370\uc774\ud130\ub97c UI\uc5d0 \ubc18\uc601\ud558\uae30 \uc704\ud574 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. StreamBuilder\ub294 Stream\uacfc \uc5f0\uacb0\ub418\uc5b4 \uc788\uc73c\uba70, \ub370\uc774\ud130\uac00 \uc0c8\ub86d\uac8c \ubc1c\uc0dd\ud560 \ub54c\ub9c8\ub2e4 \uc790\ub3d9\uc73c\ub85c UI\ub97c \uc5c5\ub370\uc774\ud2b8\ud569\ub2c8\ub2e4.<\/p>\n<h3>2.1 StreamBuilder\uc758 \uad6c\uc870<\/h3>\n<p>StreamBuilder\ub294 \uc77c\ubc18\uc801\uc73c\ub85c \ub2e4\uc74c\uacfc \uac19\uc740 \ud615\ud0dc\ub85c \uc0ac\uc6a9\ub429\ub2c8\ub2e4:<\/p>\n<pre><code>StreamBuilder<t>(\n  stream: yourStream,\n  builder: (BuildContext context, AsyncSnapshot<t> snapshot) {\n    \/\/ \ub370\uc774\ud130\ub97c \ucc98\ub9ac\ud558\uace0 UI\ub97c \uad6c\uc131\ud569\ub2c8\ub2e4.\n  },\n);<\/t><\/t><\/code><\/pre>\n<p>\uc5ec\uae30\uc11c <code>yourStream<\/code>\ub294 \ub370\uc774\ud130\uac00 \uc0dd\uc131\ub420 \uc704\uce58\uc774\uba70, \uc774 Stream\uc5d0 \ub300\ud55c \ub9ac\uc2a4\ub108\uac00 \uc790\ub3d9\uc73c\ub85c \uc0dd\uc131\ub429\ub2c8\ub2e4. <code>builder<\/code> \ub9e4\uac1c \ubcc0\uc218\ub294 Snapshot\uc744 \ubc1b\uc544\uc11c UI\ub97c \uc0dd\uc131\ud558\ub294 \ud568\uc218\uc785\ub2c8\ub2e4.<\/p>\n<h3>2.2 AsyncSnapshot<\/h3>\n<p>StreamBuilder\uc758 <code>builder<\/code> \ud568\uc218\uc5d0\uc11c \ubc1b\ub294 <code>AsyncSnapshot<\/code> \uac1d\uccb4\ub294 Stream\uc758 \uc0c1\ud0dc \ubc0f \ub370\uc774\ud130\ub97c \ud3ec\ud568\ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ub370\uc774\ud130\uc758 \ub85c\ub529 \uc0c1\ud0dc, \uc624\ub958 \ubc1c\uc0dd \uc5ec\ubd80 \ub4f1\uc744 \uc27d\uac8c \uad00\ub9ac\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>3. Stream\uacfc StreamBuilder\uc758 \uc0ac\uc6a9 \uc608\uc81c<\/h2>\n<p>\uc774\uc81c \uc2e4\uc81c \ucf54\ub4dc\ub97c \ud1b5\ud574 Stream\uacfc StreamBuilder\uc758 \uc0ac\uc6a9\ubc95\uc744 \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc774 \uc608\uc81c\uc5d0\uc11c\ub294 \uc8fc\uae30\uc801\uc73c\ub85c \ud604\uc7ac \uc2dc\uac04\uc744 \uc2a4\ud2b8\ub9bc\uc73c\ub85c \uc804\uc1a1\ud558\uace0, StreamBuilder\ub97c \ud1b5\ud574 \uc774\ub97c \ud45c\uc2dc\ud558\ub294 \uac04\ub2e8\ud55c \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \ub9cc\ub4e4\uc5b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>3.1 Stream \uc0dd\uc131\ud558\uae30<\/h3>\n<p>\uba3c\uc800, \uc2dc\uac04\uc744 \uc8fc\uae30\uc801\uc73c\ub85c \ubcf4\ub0b4\uc8fc\ub294 Stream\uc744 \uc0dd\uc131\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<pre><code>Stream&lt;DateTime&gt; getTimeStream() async* {\n  while (true) {\n    yield DateTime.now();\n    await Future.delayed(Duration(seconds: 1));\n  }\n}<\/code><\/pre>\n<p>\uc704 \ucf54\ub4dc\ub294 <code>DateTime<\/code> \uac1d\uccb4\ub97c 1\ucd08\ub9c8\ub2e4 \uc0dd\uc131\ud558\ub294 Stream\uc744 \ubc18\ud658\ud569\ub2c8\ub2e4. <code>async*<\/code> \ud0a4\uc6cc\ub4dc\ub97c \uc0ac\uc6a9\ud558\uc5ec \ube44\ub3d9\uae30 \ud568\uc218\ub97c \uc815\uc758\ud558\uace0 <code>yield<\/code>\ub97c \ud1b5\ud574 \uac12\uc744 \ubc1c\uc0dd\uc2dc\ud0b5\ub2c8\ub2e4.<\/p>\n<h3>3.2 StreamBuilder\ub85c UI \uad6c\uc131\ud558\uae30<\/h3>\n<p>\uc774\uc81c StreamBuilder\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc704\uc5d0\uc11c \uc0dd\uc131\ud55c Stream\uc744 UI\uc5d0 \ud45c\uc2dc\ud574\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<pre><code>class TimeDisplay extends StatelessWidget {\n  @override\n  Widget build(BuildContext context) {\n    return StreamBuilder&lt;DateTime&gt;(\n      stream: getTimeStream(),\n      builder: (context, snapshot) {\n        if (snapshot.connectionState == ConnectionState.waiting) {\n          return Text('Loading...');\n        } else if (snapshot.hasError) {\n          return Text('Error: ${snapshot.error}');\n        } else {\n          return Text('Current time: ${snapshot.data}');\n        }\n      },\n    );\n  }\n}<\/code><\/pre>\n<p>\uc704 \ucf54\ub4dc\ub294 StreamBuilder\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc2dc\uac04\uc744 \ud45c\uc2dc\ud558\ub294 \uc608\uc81c\uc785\ub2c8\ub2e4. \ub85c\ub529 \uc911\uc77c \ub54c\ub294 &#8216;Loading&#8230;&#8217;\uc774\ub77c\ub294 \ud14d\uc2a4\ud2b8\ub97c \ucd9c\ub825\ud558\uace0, \uc624\ub958\uac00 \ubc1c\uc0dd\ud558\uba74 \uc624\ub958 \uba54\uc2dc\uc9c0\ub97c \ucd9c\ub825\ud558\uba70, \ub370\uc774\ud130\uac00 \uc131\uacf5\uc801\uc73c\ub85c \uc218\uc2e0\ub418\uba74 \ud604\uc7ac \uc2dc\uac04\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.<\/p>\n<h2>4. Stream\uacfc StreamBuilder\uc758 \ud65c\uc6a9 \uc0ac\ub840<\/h2>\n<p>Stream\uacfc StreamBuilder\ub294 \ub2e4\uc591\ud55c \uacf3\uc5d0\uc11c \ud65c\uc6a9\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c\uc740 \uc774\ub97c \ud65c\uc6a9\ud560 \uc218 \uc788\ub294 \uba87 \uac00\uc9c0 \uc608\uc2dc\uc785\ub2c8\ub2e4:<\/p>\n<h3>4.1 \uc2e4\uc2dc\uac04 \ub370\uc774\ud130 \ud1b5\uc2e0<\/h3>\n<p>\uc608\ub97c \ub4e4\uc5b4, \ucc57 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c\ub294 \uc0ac\uc6a9\uc790\uac00 \ubcf4\ub0b4\ub294 \uba54\uc2dc\uc9c0\ub97c \uc2e4\uc2dc\uac04\uc73c\ub85c \ubc1b\uc544\uc640\uc57c \ud569\ub2c8\ub2e4. \uc774\ub54c Stream\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc0c8 \uba54\uc2dc\uc9c0\ub97c \uc218\uc2e0\ud558\uace0 StreamBuilder\ub97c \uc0ac\uc6a9\ud558\uc5ec UI\ub97c \uc5c5\ub370\uc774\ud2b8\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>4.2 \uc8fc\uae30\uc801\uc778 \ub370\uc774\ud130 \uc5c5\ub370\uc774\ud2b8<\/h3>\n<p>\uc8fc\uc2dd \uac00\uaca9\uc774\ub098 \ub0a0\uc528 \uc815\ubcf4\uc640 \uac19\uc774 \uc8fc\uae30\uc801\uc73c\ub85c \uc5c5\ub370\uc774\ud2b8\ub418\ub294 \ub370\uc774\ud130\ub97c \uac00\uc838\uc62c \ub54c Stream\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uc0ac\uc6a9\uc790\uc5d0\uac8c \ud56d\uc0c1 \ucd5c\uc2e0 \uc815\ubcf4\ub97c \uc81c\uacf5\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>4.3 \uc0ac\uc6a9\uc790 \uc774\ubca4\ud2b8 \ucc98\ub9ac<\/h3>\n<p>\uc0ac\uc6a9\uc790\uc758 \uc785\ub825\uc774\ub098 \ub3d9\uc791\uc744 \uac10\uc9c0\ud558\uc5ec \uc2e4\uc2dc\uac04 \ud53c\ub4dc\ubc31\uc744 \uc81c\uacf5\ud558\ub294 \uc571\uc5d0\uc11c\ub3c4 Stream\uc744 \ud65c\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc0ac\uc6a9\uc790\uac00 \ud3fc\uc744 \uc791\uc131\ud560 \ub54c, \uac01 \ud544\ub4dc\uc758 \uc720\ud6a8\uc131\uc744 \uc2e4\uc2dc\uac04\uc73c\ub85c \uac80\uc0ac\ud558\uace0 \ud53c\ub4dc\ubc31\uc744 \uc8fc\ub294 \uacbd\uc6b0\uc785\ub2c8\ub2e4.<\/p>\n<h2>5. Stream\uacfc StreamBuilder\uc758 \uc7a5\ub2e8\uc810<\/h2>\n<h3>5.1 \uc7a5\uc810<\/h3>\n<ul>\n<li><strong>\ube44\ub3d9\uae30 \ucc98\ub9ac:<\/strong> \ub370\uc774\ud130\ub97c \ube44\ub3d9\uae30\ub85c \ucc98\ub9ac\ud558\uc5ec UI\uc758 \ubc18\uc751\uc131\uc744 \ub192\uc785\ub2c8\ub2e4.<\/li>\n<li><strong>\uc2e4\uc2dc\uac04 \uc5c5\ub370\uc774\ud2b8:<\/strong> \ub370\uc774\ud130\uac00 \ubcc0\uacbd\ub420 \ub54c\ub9c8\ub2e4 UI\ub97c \uc790\ub3d9\uc73c\ub85c \uc5c5\ub370\uc774\ud2b8\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\ubcf5\uc7a1\ud55c \ub370\uc774\ud130 \ud750\ub984 \uad00\ub9ac:<\/strong> \uc5ec\ub7ec \ub370\uc774\ud130 \uc18c\uc2a4\uc640 \ubcf5\uc7a1\ud55c \ub370\uc774\ud130 \ud750\ub984\uc744 \uc27d\uac8c \uad00\ub9ac\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h3>5.2 \ub2e8\uc810<\/h3>\n<ul>\n<li><strong>\ubcf5\uc7a1\uc131:<\/strong> \ucd08\ubcf4\uc790\uc5d0\uac8c\ub294 \ube44\ub3d9\uae30 \ud504\ub85c\uadf8\ub798\ubc0d\uc774 \ubcf5\uc7a1\ud558\uac8c \ub290\uaef4\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<li><strong>\uc790\uc6d0 \uc18c\ubaa8:<\/strong> \ubd88\ud544\uc694\ud55c Stream\uc744 \uc720\uc9c0\ud558\uba74 \uc2dc\uc2a4\ud15c \uc790\uc6d0\uc744 \ub0ad\ube44\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<li><strong>\uc624\ub958 \uad00\ub9ac:<\/strong> \ube44\ub3d9\uae30 \uc791\uc5c5\uc5d0\uc11c \ubc1c\uc0dd\ud560 \uc218 \uc788\ub294 \uc624\ub958\ub97c \uc77c\uad00\ub418\uac8c \ucc98\ub9ac\ud574\uc57c \ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h2>6. \uacb0\ub860<\/h2>\n<p>\uc774 \uae00\uc5d0\uc11c\ub294 \ud50c\ub7ec\ud130\uc758 Stream\uacfc StreamBuilder\uc5d0 \ub300\ud574 \uc790\uc138\ud788 \uc54c\uc544\ubcf4\uc558\uc2b5\ub2c8\ub2e4. Stream\uc740 \ub370\uc774\ud130\ub97c \ube44\ub3d9\uae30\ub85c \uc804\ub2ec\ud558\ub294 \uac15\ub825\ud55c \ub3c4\uad6c\uc774\uba70, StreamBuilder\ub294 \uc774\ub97c UI\uc5d0 \uc27d\uac8c \uc801\uc6a9\ud560 \uc218 \uc788\ub3c4\ub85d \ub3c4\uc640\uc8fc\ub294 \uc704\uc82f\uc785\ub2c8\ub2e4. \uc2e4\uc81c \uc608\uc81c\ub97c \ud1b5\ud574 \uc774 \ub450 \uac1c\ub150\uc744 \uc774\ud574\ud558\ub294 \ub370 \ub3c4\uc6c0\uc774 \ub418\uc5c8\uae30\ub97c \ubc14\ub78d\ub2c8\ub2e4. \ube44\ub3d9\uae30 \ud504\ub85c\uadf8\ub798\ubc0d\uc740 \ucc98\uc74c\uc5d0\ub294 \ub2e4\uc18c \uc5b4\ub824\uc6b8 \uc218 \uc788\uc9c0\ub9cc, \ub2e4\uc591\ud55c \ud65c\uc6a9 \uc0ac\ub840\ub97c \ud1b5\ud574 \uc810\uc810 \uc775\uc219\ud574\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ud50c\ub7ec\ud130\ub97c \ud1b5\ud55c \uc7ac\ubc0c\uace0 \uc720\uc6a9\ud55c \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uac1c\ubc1c\uc5d0 \uc774 \ub450 \uac1c\ub150\uc744 \uc801\uadf9 \ud65c\uc6a9\ud574\ubcf4\uc138\uc694!<\/p>\n<h2>7. \ucc38\uace0 \uc790\ub8cc<\/h2>\n<ul>\n<li><a href=\"https:\/\/flutter.dev\/docs\" target=\"_blank\" rel=\"noopener\">Flutter \uacf5\uc2dd \ubb38\uc11c<\/a><\/li>\n<li><a href=\"https:\/\/dart.dev\/codelabs\" target=\"_blank\" rel=\"noopener\">Dart \ucf54\ub4dc\ub97c \uc2e4\uc2b5\ud560 \uc218 \uc788\ub294 Codelabs<\/a><\/li>\n<li><a href=\"https:\/\/medium.com\/flutter\" target=\"_blank\" rel=\"noopener\">Medium Flutter \uad00\ub828 \uae00<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\ud50c\ub7ec\ud130\ub294 \ube44\ub3d9\uae30 \ud504\ub85c\uadf8\ub798\ubc0d\uc744 \uc9c0\uc6d0\ud558\ub294 \uac15\ub825\ud55c \ud504\ub808\uc784\uc6cc\ud06c\uc785\ub2c8\ub2e4. \uadf8 \uc911\uc5d0\uc11c\ub3c4 Stream\uacfc StreamBuilder\ub294 \ub370\uc774\ud130\uc758 \ud750\ub984\uc744 \ub2e4\ub8e8\uae30 \uc704\ud574 \ud544\uc218\uc801\uc778 \uc694\uc18c\uc785\ub2c8\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294 Stream\uacfc StreamBuilder\uc758 \uac1c\ub150, \uc0ac\uc6a9\ubc95 \ubc0f \uc2e4\uc81c \uc608\uc81c\ub97c \ud1b5\ud574 \uc774 \ub450 \uac1c\ub150\uc744 \uae4a\uc774 \uc788\uac8c \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. 1. Stream\uc774\ub780? 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