mirror of
https://github.com/easydiffusion/easydiffusion.git
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204 lines
9.5 KiB
Python
204 lines
9.5 KiB
Python
"""server.py: FastAPI SD-UI Web Host.
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Notes:
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async endpoints always run on the main thread. Without they run on the thread pool.
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"""
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import os
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import traceback
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import datetime
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from typing import List, Union
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from fastapi import FastAPI, HTTPException
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from fastapi.staticfiles import StaticFiles
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from starlette.responses import FileResponse, JSONResponse, StreamingResponse
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from pydantic import BaseModel
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from easydiffusion import app, model_manager, task_manager
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from easydiffusion.types import TaskData, GenerateImageRequest
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from easydiffusion.utils import log
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log.info(f'started in {app.SD_DIR}')
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log.info(f'started at {datetime.datetime.now():%x %X}')
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server_api = FastAPI()
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NOCACHE_HEADERS={"Cache-Control": "no-cache, no-store, must-revalidate", "Pragma": "no-cache", "Expires": "0"}
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class NoCacheStaticFiles(StaticFiles):
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def is_not_modified(self, response_headers, request_headers) -> bool:
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if 'content-type' in response_headers and ('javascript' in response_headers['content-type'] or 'css' in response_headers['content-type']):
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response_headers.update(NOCACHE_HEADERS)
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return False
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return super().is_not_modified(response_headers, request_headers)
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class SetAppConfigRequest(BaseModel):
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update_branch: str = None
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render_devices: Union[List[str], List[int], str, int] = None
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model_vae: str = None
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ui_open_browser_on_start: bool = None
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listen_to_network: bool = None
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listen_port: int = None
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server_api.mount('/media', NoCacheStaticFiles(directory=os.path.join(app.SD_UI_DIR, 'media')), name="media")
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for plugins_dir, dir_prefix in app.UI_PLUGINS_SOURCES:
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server_api.mount(f'/plugins/{dir_prefix}', NoCacheStaticFiles(directory=plugins_dir), name=f"plugins-{dir_prefix}")
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@server_api.post('/app_config')
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async def setAppConfig(req : SetAppConfigRequest):
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config = app.getConfig()
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if req.update_branch is not None:
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config['update_branch'] = req.update_branch
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if req.render_devices is not None:
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update_render_devices_in_config(config, req.render_devices)
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if req.ui_open_browser_on_start is not None:
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if 'ui' not in config:
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config['ui'] = {}
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config['ui']['open_browser_on_start'] = req.ui_open_browser_on_start
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if req.listen_to_network is not None:
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if 'net' not in config:
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config['net'] = {}
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config['net']['listen_to_network'] = bool(req.listen_to_network)
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if req.listen_port is not None:
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if 'net' not in config:
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config['net'] = {}
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config['net']['listen_port'] = int(req.listen_port)
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try:
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app.setConfig(config)
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if req.render_devices:
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app.update_render_threads()
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return JSONResponse({'status': 'OK'}, headers=NOCACHE_HEADERS)
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except Exception as e:
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log.error(traceback.format_exc())
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raise HTTPException(status_code=500, detail=str(e))
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def update_render_devices_in_config(config, render_devices):
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if render_devices not in ('cpu', 'auto') and not render_devices.startswith('cuda:'):
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raise HTTPException(status_code=400, detail=f'Invalid render device requested: {render_devices}')
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if render_devices.startswith('cuda:'):
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render_devices = render_devices.split(',')
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config['render_devices'] = render_devices
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@server_api.get('/get/{key:path}')
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def read_web_data(key:str=None):
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if not key: # /get without parameters, stable-diffusion easter egg.
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raise HTTPException(status_code=418, detail="StableDiffusion is drawing a teapot!") # HTTP418 I'm a teapot
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elif key == 'app_config':
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return JSONResponse(app.getConfig(), headers=NOCACHE_HEADERS)
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elif key == 'system_info':
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config = app.getConfig()
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system_info = {
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'devices': task_manager.get_devices(),
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'hosts': app.getIPConfig(),
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'default_output_dir': os.path.join(os.path.expanduser("~"), app.OUTPUT_DIRNAME),
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}
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system_info['devices']['config'] = config.get('render_devices', "auto")
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return JSONResponse(system_info, headers=NOCACHE_HEADERS)
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elif key == 'models':
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return JSONResponse(model_manager.getModels(), headers=NOCACHE_HEADERS)
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elif key == 'modifiers': return FileResponse(os.path.join(app.SD_UI_DIR, 'modifiers.json'), headers=NOCACHE_HEADERS)
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elif key == 'ui_plugins': return JSONResponse(app.getUIPlugins(), headers=NOCACHE_HEADERS)
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else:
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raise HTTPException(status_code=404, detail=f'Request for unknown {key}') # HTTP404 Not Found
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@server_api.get('/ping') # Get server and optionally session status.
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def ping(session_id:str=None):
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if task_manager.is_alive() <= 0: # Check that render threads are alive.
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if task_manager.current_state_error: raise HTTPException(status_code=500, detail=str(task_manager.current_state_error))
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raise HTTPException(status_code=500, detail='Render thread is dead.')
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if task_manager.current_state_error and not isinstance(task_manager.current_state_error, StopAsyncIteration): raise HTTPException(status_code=500, detail=str(task_manager.current_state_error))
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# Alive
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response = {'status': str(task_manager.current_state)}
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if session_id:
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session = task_manager.get_cached_session(session_id, update_ttl=True)
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response['tasks'] = {id(t): t.status for t in session.tasks}
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response['devices'] = task_manager.get_devices()
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return JSONResponse(response, headers=NOCACHE_HEADERS)
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@server_api.post('/render')
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def render(req: dict):
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try:
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# separate out the request data into rendering and task-specific data
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render_req: GenerateImageRequest = GenerateImageRequest.parse_obj(req)
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task_data: TaskData = TaskData.parse_obj(req)
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render_req.init_image_mask = req.get('mask') # hack: will rename this in the HTTP API in a future revision
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app.save_to_config(task_data.use_stable_diffusion_model, task_data.use_vae_model, task_data.use_hypernetwork_model, task_data.vram_usage_level)
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# enqueue the task
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new_task = task_manager.render(render_req, task_data)
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response = {
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'status': str(task_manager.current_state),
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'queue': len(task_manager.tasks_queue),
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'stream': f'/image/stream/{id(new_task)}',
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'task': id(new_task)
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}
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return JSONResponse(response, headers=NOCACHE_HEADERS)
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except ChildProcessError as e: # Render thread is dead
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raise HTTPException(status_code=500, detail=f'Rendering thread has died.') # HTTP500 Internal Server Error
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except ConnectionRefusedError as e: # Unstarted task pending limit reached, deny queueing too many.
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raise HTTPException(status_code=503, detail=str(e)) # HTTP503 Service Unavailable
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except Exception as e:
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log.error(traceback.format_exc())
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raise HTTPException(status_code=500, detail=str(e))
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@server_api.get('/image/stream/{task_id:int}')
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def stream(task_id:int):
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#TODO Move to WebSockets ??
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task = task_manager.get_cached_task(task_id, update_ttl=True)
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if not task: raise HTTPException(status_code=404, detail=f'Request {task_id} not found.') # HTTP404 NotFound
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#if (id(task) != task_id): raise HTTPException(status_code=409, detail=f'Wrong task id received. Expected:{id(task)}, Received:{task_id}') # HTTP409 Conflict
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if task.buffer_queue.empty() and not task.lock.locked():
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if task.response:
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#log.info(f'Session {session_id} sending cached response')
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return JSONResponse(task.response, headers=NOCACHE_HEADERS)
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raise HTTPException(status_code=425, detail='Too Early, task not started yet.') # HTTP425 Too Early
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#log.info(f'Session {session_id} opened live render stream {id(task.buffer_queue)}')
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return StreamingResponse(task.read_buffer_generator(), media_type='application/json')
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@server_api.get('/image/stop')
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def stop(task: int):
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if not task:
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if task_manager.current_state == task_manager.ServerStates.Online or task_manager.current_state == task_manager.ServerStates.Unavailable:
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raise HTTPException(status_code=409, detail='Not currently running any tasks.') # HTTP409 Conflict
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task_manager.current_state_error = StopAsyncIteration('')
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return {'OK'}
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task_id = task
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task = task_manager.get_cached_task(task_id, update_ttl=False)
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if not task: raise HTTPException(status_code=404, detail=f'Task {task_id} was not found.') # HTTP404 Not Found
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if isinstance(task.error, StopAsyncIteration): raise HTTPException(status_code=409, detail=f'Task {task_id} is already stopped.') # HTTP409 Conflict
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task.error = StopAsyncIteration(f'Task {task_id} stop requested.')
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return {'OK'}
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@server_api.get('/image/tmp/{task_id:int}/{img_id:int}')
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def get_image(task_id: int, img_id: int):
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task = task_manager.get_cached_task(task_id, update_ttl=True)
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if not task: raise HTTPException(status_code=410, detail=f'Task {task_id} could not be found.') # HTTP404 NotFound
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if not task.temp_images[img_id]: raise HTTPException(status_code=425, detail='Too Early, task data is not available yet.') # HTTP425 Too Early
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try:
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img_data = task.temp_images[img_id]
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img_data.seek(0)
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return StreamingResponse(img_data, media_type='image/jpeg')
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except KeyError as e:
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raise HTTPException(status_code=500, detail=str(e))
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@server_api.get('/')
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def read_root():
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return FileResponse(os.path.join(app.SD_UI_DIR, 'index.html'), headers=NOCACHE_HEADERS)
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@server_api.on_event("shutdown")
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def shutdown_event(): # Signal render thread to close on shutdown
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task_manager.current_state_error = SystemExit('Application shutting down.')
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# Init the app
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model_manager.init()
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app.init()
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# start the browser ui
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app.open_browser()
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