application/x-bzip=bz\n\
application/x-bzip2=bz2\n\
application/x-tar=tar\n\
application/x-rar-compressed=rar\n\
video/3gp=3gp\n\
video/3g2=3g2\n\
video/x-msvideo=avi\n\
video/x-flv=flv\n\
video/mpeg=mpeg\n\
video/mp4=mp4\n\
video/ogv=ogv\n\
video/quicktime=qt\n\
video/x-m4v=m4v\n\
audio/x-aif=aif\n\
audio/midi=midi\n\
audio/mpga=mpga\n\
audio/mp4=mp4a\n\
audio/ogg=oga\n\

from fastapi import FastAPI
from fastapi.responses import FileResponse

some_file_path = "large-video-file.mp4"
app = FastAPI()


@app.get("/")
async def main():

labels.facet_filetype_rar=RAR Archive
labels.facet_filetype_3gp=3gp Video
labels.facet_filetype_3g2=3g2 Video
labels.facet_filetype_avi=AVI Video
labels.facet_filetype_flv=FLV Video
labels.facet_filetype_mpeg=MPEG Video
labels.facet_filetype_mp4=MP4 Video
labels.facet_filetype_ogv=OGV Video
labels.facet_filetype_qt=QuickTime Video
labels.facet_filetype_m4v=M4V Video
labels.facet_filetype_ogg=OGG Audio

Consider an application streaming a video over http/2. Perhaps the user pauses the video and the application stops reading bytes from this stream. The buffer will fill up, and flow control prevents the server from sending more data on this stream. When the user unpauses her video the buffer drains, the read is acknowledged, and the server proceeds to stream data.

#### Shared reader thread

from fastapi import FastAPI
from fastapi.responses import StreamingResponse

app = FastAPI()


async def fake_video_streamer():
    for i in range(10):
        yield b"some fake video bytes"


@app.get("/")
async def main():

labels.facet_filetype_rar	=	RAR Archive
labels.facet_filetype_3gp	=	3gp Video
labels.facet_filetype_3g2	=	3g2 Video
labels.facet_filetype_avi	=	AVI Video
labels.facet_filetype_flv	=	FLV Video
labels.facet_filetype_mpeg	=	MPEG Video
labels.facet_filetype_mp4	=	MP4 Video
labels.facet_filetype_ogv	=	OGV Video
labels.facet_filetype_qt	=	QuickTime Video
labels.facet_filetype_m4v	=	M4V Video
labels.facet_filetype_ogg	=	OGG Audio

labels.facet_filetype_rar=RAR Archive
labels.facet_filetype_3gp=3gp Video
labels.facet_filetype_3g2=3g2 Video
labels.facet_filetype_avi=AVI Video
labels.facet_filetype_flv=FLV Video
labels.facet_filetype_mpeg=MPEG Video
labels.facet_filetype_mp4=MP4 Video
labels.facet_filetype_ogv=OGV Video
labels.facet_filetype_qt=QuickTime Video
labels.facet_filetype_m4v=M4V Video
labels.facet_filetype_ogg=OGG Audio

labels.facet_filetype_rar=RAR-Archiv
labels.facet_filetype_3gp=3gp-Video
labels.facet_filetype_3g2=3g2-Video
labels.facet_filetype_avi=AVI-Video
labels.facet_filetype_flv=FLV-Video
labels.facet_filetype_mpeg=MPEG-Video
labels.facet_filetype_mp4=MP4-Video
labels.facet_filetype_ogv=OGV-Video
labels.facet_filetype_qt=QuickTime-Video
labels.facet_filetype_m4v=M4V-Video
labels.facet_filetype_ogg=OGG-Audio

from fastapi import FastAPI
from fastapi.responses import FileResponse

some_file_path = "large-video-file.mp4"
app = FastAPI()


@app.get("/", response_class=FileResponse)
async def main():

from fastapi.testclient import TestClient

from docs_src.custom_response.tutorial007 import app

client = TestClient(app)


def test_get():
    fake_content = b"some fake video bytes"
    response = client.get("/")