STREAMING Archives - icodebroker

[PYTHON/FASTAPI] FastAPI 클래스 : StreamingResponse 객체를 사용해 응답 스트리밍 처리하기

■ FastAPI 클래스에서 StreamingResponse 객체를 사용해 응답 스트리밍을 처리하는 방법을 보여준다. ▶ main.py


import json

from pydantic          import BaseModel
from fastapi           import APIRouter
from fastapi           import Path
from fastapi.responses import StreamingResponse
from fastapi           import FastAPI

class TodoItem(BaseModel):
    id   : int
    item : str

    class Config:
        json_schema_extra = {
            "example" : {
                "id"   : 1,
                "item" : "Example Schema!"
            }
        }

class TodoItemUpdate(BaseModel):
    item : str

    class Config:
        json_schema_extra = {
            "example" : {
            "item" : "Read the next chapter of the book"
        }
    }

todoItemList = []

apiRouter = APIRouter()

@apiRouter.post("/todo")
async def addTodoItem(todoItem : TodoItem) -> dict:
    todoItemList.append(todoItem)
    return {"message" : "Todo item added successfully"}

@apiRouter.get("/todo")
async def getTodoItemList() -> dict:
    return {"todoItemList" : todoItemList}

async def enumerateTodoItemListInternal():
    for todoItem in todoItemList:
        yield json.dumps(todoItem.dict()) + "\n"

@apiRouter.get("/todos")
async def enumerateTodoItemList():
    return StreamingResponse(enumerateTodoItemListInternal(), media_type = "application/json")

@apiRouter.get("/todo/{todoItemID}")
async def getTodoItem(todoItemID : int = Path(..., title = "The ID of the todo item to retrieve.")) -> dict:
    for todoItem in todoItemList:
        if todoItem.id == todoItemID:
            return {"todoItem" : todoItem}
    return {"message" : "Todo item with supplied ID doesn't exist."}

@apiRouter.put("/todo/{todoItemID}")
async def updateTodo(todoItemUpdate: TodoItemUpdate, todoItemID : int = Path(..., title = "The ID of the todo item to be updated.")) -> dict:
    for todoItem in todoItemList:
        if todoItem.id == todoItemID:
            todoItem.item = todoItemUpdate.item
            return {"message" : "Todo item updated successfully."}
    return {"message" : "Todo item with supplied ID doesn't exist."}

@apiRouter.delete("/todo/{todoItemID}")
async def deleteTodo(todoItemID : int) -> dict:
  for index in range(len(todoItemList)):
      todoItem = todoItemList[index]
      if todoItem.id == todoItemID:
          todoItemList.pop(index)
          return {"message" : "Todo item deleted successfully."}
  return {"message" : "Todo item with supplied ID doesn't exist."}

@apiRouter.delete("/todo")
async def deleteAllTodoItems() -> dict:
  todoItemList.clear()
  return {"message" : "All Todo items deleted successfully."}

fastAPI = FastAPI()

@fastAPI.get("/")
def root():
    return {"message" : "Hello World"}

@fastAPI.get("/home")
def home():
    return {"message" : "home"}

fastAPI.include_router(apiRouter)

import json

from pydantic import BaseModel

from fastapi import APIRouter

from fastapi import Path

from fastapi.responses import StreamingResponse

from fastapi import FastAPI

class TodoItem(BaseModel):

id : int

item : str

class Config:

json_schema_extra = {

"example" : {

"id" : 1,

"item" : "Example Schema!"

}

class TodoItemUpdate(BaseModel):

item : str

class Config:

json_schema_extra = {

"example" : {

"item" : "Read the next chapter of the book"

}

todoItemList = []

apiRouter = APIRouter()

@apiRouter.post("/todo")

async def addTodoItem(todoItem : TodoItem) -> dict:

todoItemList.append(todoItem)

return {"message" : "Todo item added successfully"}

@apiRouter.get("/todo")

async def getTodoItemList() -> dict:

return {"todoItemList" : todoItemList}

async def enumerateTodoItemListInternal():

for todoItem in todoItemList:

yield json.dumps(todoItem.dict()) + "\n"

@apiRouter.get("/todos")

async def enumerateTodoItemList():

return StreamingResponse(enumerateTodoItemListInternal(), media_type = "application/json")

@apiRouter.get("/todo/{todoItemID}")

async def getTodoItem(todoItemID : int = Path(..., title = "The ID of the todo item to retrieve.")) -> dict:

for todoItem in todoItemList:

if todoItem.id == todoItemID:

return {"todoItem" : todoItem}

return {"message" : "Todo item with supplied ID doesn't exist."}

@apiRouter.put("/todo/{todoItemID}")

async def updateTodo(todoItemUpdate: TodoItemUpdate, todoItemID : int = Path(..., title = "The ID of the todo item to be updated.")) -> dict:

for todoItem in todoItemList:

if todoItem.id == todoItemID:

todoItem.item = todoItemUpdate.item

return {"message" : "Todo item updated successfully."}

return {"message" : "Todo item with supplied ID doesn't exist."}

@apiRouter.delete("/todo/{todoItemID}")

async def deleteTodo(todoItemID : int) -> dict:

for index in range(len(todoItemList)):

todoItem = todoItemList[index]

if todoItem.id == todoItemID:

todoItemList.pop(index)

return {"message" : "Todo item deleted successfully."}

return {"message" : "Todo item with supplied ID doesn't exist."}

@apiRouter.delete("/todo")

async def deleteAllTodoItems() -> dict:

todoItemList.clear()

return {"message" : "All Todo items deleted successfully."}

fastAPI = FastAPI()

@fastAPI.get("/")

def root():

return {"message" : "Hello World"}

@fastAPI.get("/home")

def home():

return {"message" : "home"}

fastAPI.include_router(apiRouter)

▶ requirements.txt


annotated-types==0.6.0
anyio==4.3.0
certifi==2024.2.2
click==8.1.7
colorama==0.4.6
dnspython==2.6.1
email_validator==2.1.1
exceptiongroup==1.2.2
fastapi==0.111.0
fastapi-cli==0.0.3
h11==0.14.0
httpcore==1.0.5
httptools==0.6.1
httpx==0.27.0
idna==3.7
itsdangerous==2.2.0
Jinja2==3.1.4
markdown-it-py==3.0.0
MarkupSafe==2.1.5
mdurl==0.1.2
orjson==3.10.3
pydantic==2.7.1
pydantic-extra-types==2.7.0
pydantic-settings==2.2.1
pydantic_core==2.18.2
Pygments==2.18.0
python-dotenv==1.0.1
python-multipart==0.0.9
PyYAML==6.0.1
rich==13.7.1
shellingham==1.5.4
sniffio==1.3.1
starlette==0.37.2
typer==0.12.3
typing_extensions==4.11.0
ujson==5.10.0
uvicorn==0.29.0
uvloop==0.19.0
watchfiles==0.21.0
websockets==12.0

annotated-types==0.6.0

anyio==4.3.0

certifi==2024.2.2

click==8.1.7

colorama==0.4.6

dnspython==2.6.1

email_validator==2.1.1

exceptiongroup==1.2.2

fastapi==0.111.0

fastapi-cli==0.0.3

h11==0.14.0

httpcore==1.0.5

httptools==0.6.1

httpx==0.27.0

idna==3.7

itsdangerous==2.2.0

Jinja2==3.1.4

markdown-it-py==3.0.0

MarkupSafe==2.1.5

mdurl==0.1.2

orjson==3.10.3

pydantic==2.7.1

pydantic-extra-types==2.7.0

pydantic-settings==2.2.1

pydantic_core==2.18.2

Pygments==2.18.0

python-dotenv==1.0.1

python-multipart==0.0.9

PyYAML==6.0.1

rich==13.7.1

shellingham==1.5.4

sniffio==1.3.1

starlette==0.37.2

typer==0.12.3

typing_extensions==4.11.0

ujson==5.10.0

uvicorn==0.29.0

uvloop==0.19.0

watchfiles==0.21.0

websockets==12.0

▶ 실행 명령


uvicorn main:fastAPI --reload

uvicorn main:fastAPI --reload

[C#/WPF] 실시간 스트리밍 프토로콜(RTSP)을 사용해 동영상 재생하기

■ 실시간 스트리밍 프토로콜(RTSP)을 사용해 동영상을 재생하는 방법을 보여준다. [TestProject 프로젝트] ▶ MainWindow.xaml


<Window x:Class="TestProject.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:control="clr-namespace:TestLibrary;assembly=TestLibrary"
    Width="800"
    Height="600"
    Title="실시간 스트리밍 프토로콜(RTSP)을 사용해 동영상 재생하기"
    FontFamily="나눔고딕코딩"
    FontSize="16">
    <Grid Margin="10">
        <Grid.RowDefinitions>
            <RowDefinition Height="*"   />
            <RowDefinition Height="10"  />
            <RowDefinition Height="Auto"/>
        </Grid.RowDefinitions>
        <Border Grid.Row="0"
            BorderThickness="1"
            BorderBrush="Black">
            <control:StreamPlayerControl x:Name="streamPlayerControl" />
        </Border>
        <Grid Grid.Row="2">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*"    />
                <ColumnDefinition Width="Auto" />
                <ColumnDefinition Width="Auto" />
                <ColumnDefinition Width="Auto" />
                <ColumnDefinition Width="Auto" />
            </Grid.ColumnDefinitions>
            <TextBox x:Name="urlTextBox"
                BorderBrush="Black"
                VerticalContentAlignment="Center"
                Text="rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov" />
            <TextBox x:Name="statusLabel" Grid.Column="1"
                Margin="10 0 0 0"
                Width="100"
                BorderBrush="Black"
                IsEnabled="False"
                VerticalContentAlignment="Center" />
            <Button x:Name="playButton" Grid.Column="2"
                Margin="10 0 0 0 "
                Width="100"
                Height="30"
                Content="재생하기" />
            <Button x:Name="stopButton" Grid.Column="3"
                Margin="10 0 0 0 "
                Width="100"
                Height="30"
                IsEnabled="False"
                Content="중단하기" />
            <Button x:Name="imageButton" Grid.Column="4"
                Margin="10 0 0 0 "
                Width="100"
                Height="30"
                IsEnabled="False"
                Content="이미지" />
        </Grid>
    </Grid>
</Window>

<Window x:Class="TestProject.MainWindow"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:control="clr-namespace:TestLibrary;assembly=TestLibrary"

Width="800"

Height="600"

Title="실시간 스트리밍 프토로콜(RTSP)을 사용해 동영상 재생하기"

FontFamily="나눔고딕코딩"

FontSize="16">

<Grid.RowDefinitions>

</Grid.RowDefinitions>

<Border Grid.Row="0"

BorderThickness="1"

BorderBrush="Black">

<control:StreamPlayerControl x:Name="streamPlayerControl" />

</Border>

<Grid.ColumnDefinitions>

</Grid.ColumnDefinitions>

<TextBox x:Name="urlTextBox"

BorderBrush="Black"

VerticalContentAlignment="Center"

Text="rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov" />

<TextBox x:Name="statusLabel" Grid.Column="1"

Margin="10 0 0 0"

Width="100"

BorderBrush="Black"

IsEnabled="False"

VerticalContentAlignment="Center" />

<Button x:Name="playButton" Grid.Column="2"

Margin="10 0 0 0 "

Width="100"

Height="30"

Content="재생하기" />

<Button x:Name="stopButton" Grid.Column="3"

Margin="10 0 0 0 "

Width="100"

Height="30"

IsEnabled="False"

Content="중단하기" />

<Button x:Name="imageButton" Grid.Column="4"

Margin="10 0 0 0 "

Width="100"

Height="30"

IsEnabled="False"

Content="이미지" />

</Grid>

</Window>

▶ MainWindow.xaml.cs


using Microsoft.Win32;
using System;
using System.Windows;

using TestLibrary;

namespace TestProject
{
    /// <summary>
    /// 메인 윈도우
    /// </summary>
    public partial class MainWindow
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainWindow()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainWindow()
        {
            InitializeComponent();

            this.streamPlayerControl.StreamFailed  += streamPlayerControl_StreamHandler;
            this.streamPlayerControl.StreamStarted += streamPlayerControl_StreamHandler;
            this.streamPlayerControl.StreamStopped += streamPlayerControl_StreamHandler;
            this.playButton.Click                  += playButton_Click;
            this.stopButton.Click                  += stopButton_Click;
            this.imageButton.Click                 += imageButton_Click;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

        #region 스트림 재생기 컨트롤 스트림 핸들러 - streamPlayerControl_StreamHandler(sender, e)

        /// <summary>
        /// 스트림 재생기 컨트롤 스트림 핸들러
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void streamPlayerControl_StreamHandler(object sender, RoutedEventArgs e)
        {
            SetButtonEnabled();

            if(e.RoutedEvent.Name == "StreamStarted")
            {
                this.statusLabel.Text = "재생";
            }
            else if(e.RoutedEvent.Name == "StreamFailed")
            {
                statusLabel.Text = "실패";

                MessageBox.Show
                (
                    ((StreamFailedEventArgs)e).Error,
                    "에러",
                    MessageBoxButton.OK,
                    MessageBoxImage.Error
                );
            }
            else if(e.RoutedEvent.Name == "StreamStopped")
            {
                statusLabel.Text = "중단";
            }
        }

        #endregion
        #region 재생하기 버튼 클릭시 처리하기 - playButton_Click(sender, e)

        /// <summary>
        /// 재생하기 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void playButton_Click(object sender, RoutedEventArgs e)
        {
            Uri uri = new Uri(this.urlTextBox.Text);

            this.streamPlayerControl.StartPlay(uri);

            this.statusLabel.Text = "연결중...";
        }

        #endregion
        #region 중단하기 버튼 클릭시 처리하기 - stopButton_Click(sender, e)

        /// <summary>
        /// 중단하기 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void stopButton_Click(object sender, RoutedEventArgs e)
        {
            this.streamPlayerControl.Stop();
        }

        #endregion
        #region 이미지 버튼 클릭시 처리하기 - stopButton_Click(sender, e)

        /// <summary>
        /// 이미지 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void imageButton_Click(object sender, RoutedEventArgs e)
        {
            SaveFileDialog dialog = new SaveFileDialog { Filter = "비트맵 이미지|*.bmp" };

            if(dialog.ShowDialog() == true)
            {
                this.streamPlayerControl.GetCurrentFrame().Save(dialog.FileName);
            }
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Function

        #region 버튼 이용 가능 여부 설정하기 - SetButtonEnabled()

        /// <summary>
        /// 버튼 이용 가능 여부 설정하기
        /// </summary>
        private void SetButtonEnabled()
        {
            this.playButton.IsEnabled  = !this.streamPlayerControl.IsPlaying;
            this.stopButton.IsEnabled  = this.streamPlayerControl.IsPlaying;
            this.imageButton.IsEnabled = this.streamPlayerControl.IsPlaying;
        }

        #endregion
    }
}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

using Microsoft.Win32;

using System;

using System.Windows;

using TestLibrary;

namespace TestProject

{

/// <summary>

/// 메인 윈도우

/// </summary>

public partial class MainWindow

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - MainWindow()

/// <summary>

/// 생성자

/// </summary>

public MainWindow()

{

InitializeComponent();

this.streamPlayerControl.StreamFailed += streamPlayerControl_StreamHandler;

this.streamPlayerControl.StreamStarted += streamPlayerControl_StreamHandler;

this.streamPlayerControl.StreamStopped += streamPlayerControl_StreamHandler;

this.playButton.Click += playButton_Click;

this.stopButton.Click += stopButton_Click;

this.imageButton.Click += imageButton_Click;

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Private

//////////////////////////////////////////////////////////////////////////////// Event

#region 스트림 재생기 컨트롤 스트림 핸들러 - streamPlayerControl_StreamHandler(sender, e)

/// <summary>

/// 스트림 재생기 컨트롤 스트림 핸들러

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void streamPlayerControl_StreamHandler(object sender, RoutedEventArgs e)

{

SetButtonEnabled();

if(e.RoutedEvent.Name == "StreamStarted")

{

this.statusLabel.Text = "재생";

}

else if(e.RoutedEvent.Name == "StreamFailed")

{

statusLabel.Text = "실패";

MessageBox.Show

(

((StreamFailedEventArgs)e).Error,

"에러",

MessageBoxButton.OK,

MessageBoxImage.Error

);

}

else if(e.RoutedEvent.Name == "StreamStopped")

{

statusLabel.Text = "중단";

}

#endregion

#region 재생하기 버튼 클릭시 처리하기 - playButton_Click(sender, e)

/// <summary>

/// 재생하기 버튼 클릭시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void playButton_Click(object sender, RoutedEventArgs e)

{

Uri uri = new Uri(this.urlTextBox.Text);

this.streamPlayerControl.StartPlay(uri);

this.statusLabel.Text = "연결중...";

}

#endregion

#region 중단하기 버튼 클릭시 처리하기 - stopButton_Click(sender, e)

/// <summary>

/// 중단하기 버튼 클릭시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void stopButton_Click(object sender, RoutedEventArgs e)

{

this.streamPlayerControl.Stop();

}

#endregion

#region 이미지 버튼 클릭시 처리하기 - stopButton_Click(sender, e)

/// <summary>

/// 이미지 버튼 클릭시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void imageButton_Click(object sender, RoutedEventArgs e)

{

SaveFileDialog dialog = new SaveFileDialog { Filter = "비트맵 이미지|*.bmp" };

if(dialog.ShowDialog() == true)

{

this.streamPlayerControl.GetCurrentFrame().Save(dialog.FileName);

}

#endregion

//////////////////////////////////////////////////////////////////////////////// Function

#region 버튼 이용 가능 여부 설정하기 - SetButtonEnabled()

/// <summary>

/// 버튼 이용 가능 여부 설정하기

/// </summary>

private void SetButtonEnabled()

{

this.playButton.IsEnabled = !this.streamPlayerControl.IsPlaying;

this.stopButton.IsEnabled = this.streamPlayerControl.IsPlaying;

this.imageButton.IsEnabled = this.streamPlayerControl.IsPlaying;

}

#endregion

}

TestSolution.zip