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import argparse
import asyncio
import os
import re
import uvicorn
from fastapi import FastAPI, Response
from fastapi.responses import FileResponse
from uvicorn.loops.auto import auto_loop_setup
import htmlcache
import texgen
app = FastAPI()
utaten_pattern = re.compile(r'[a-z0-9]+')
tex_generator = texgen.TexGenerator('pdf_cache', 'temp', 20)
html_cache = htmlcache.HtmlCache('html_cache')
preview_pdf = False
@app.get("/utaten/{item_id}.pdf")
async def get_utaten_lyric_pdf(item_id: str):
global preview_pdf
try:
lyric_info = await html_cache.get_utaten_tex_source(item_id)
pdf_path = await tex_generator.xelatex(lyric_info.tex_source)
if lyric_info.title and lyric_info.artist:
filename = f'{lyric_info.title} - {lyric_info.artist}.pdf'
elif not lyric_info.title and not lyric_info.artist:
filename = f'{lyric_info.utaten_id}.pdf'
elif lyric_info.title:
filename = f'{lyric_info.title} - {lyric_info.utaten_id}.pdf'
else:
filename = f'{lyric_info.artist} - {lyric_info.utaten_id}.pdf'
if preview_pdf:
content_disposition_type = 'inline'
else:
content_disposition_type = 'attachment'
return FileResponse(pdf_path, media_type='application/pdf', filename=filename,
content_disposition_type=content_disposition_type)
except texgen.TexGenerationError as e:
return Response(content=f'Failed to generate tex file: {e}', status_code=502)
@app.get("/utaten/{item_id}.tex")
async def get_utaten_lyric_tex(item_id: str):
try:
lyric_info = await html_cache.get_utaten_tex_source(item_id)
return Response(content=lyric_info.tex_source, media_type='application/x-tex')
except htmlcache.TexSourceGenerationError as e:
return Response(content=str(e), status_code=503)
@app.on_event("startup")
async def startup_event():
pass
def setup_loop():
if os.name == 'nt':
# use ProactorEventLoop to support async subprocess on Windows
print('Driving event loop with IOCP.')
loop = asyncio.ProactorEventLoop()
asyncio.set_event_loop(loop)
auto_loop_setup()
if __name__ == '__main__':
p = argparse.ArgumentParser(prog='utaten2tex')
p.add_argument('-l', '--host', default='127.0.0.1')
p.add_argument('-p', '--port', default='8080')
p.add_argument('-P', '--preview-pdf', action='store_true', default=False)
args = p.parse_args()
preview_pdf = args.preview_pdf
setup_loop()
uvicorn.run(
'web:app',
host=args.host,
port=int(args.port),
log_level='info',
loop='none', # use custom loop initializer
)
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