mirror of
https://github.com/easydiffusion/easydiffusion.git
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286 lines
12 KiB
Python
286 lines
12 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, MergeRequest
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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 (
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"javascript" in response_headers["content-type"] or "css" in response_headers["content-type"]
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):
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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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def init():
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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(
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f"/plugins/{dir_prefix}", NoCacheStaticFiles(directory=plugins_dir), name=f"plugins-{dir_prefix}"
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)
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@server_api.post("/app_config")
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async def set_app_config(req: SetAppConfigRequest):
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return set_app_config_internal(req)
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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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return read_web_data_internal(key)
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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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return ping_internal(session_id)
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@server_api.post("/render")
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def render(req: dict):
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return render_internal(req)
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@server_api.post("/model/merge")
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def model_merge(req: dict):
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print(req)
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return model_merge_internal(req)
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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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return stream_internal(task_id)
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@server_api.get("/image/stop")
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def stop(task: int):
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return stop_internal(task)
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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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return get_image_internal(task_id, img_id)
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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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# API implementations
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def set_app_config_internal(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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def read_web_data_internal(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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output_dir = config.get("force_save_path", os.path.join(os.path.expanduser("~"), app.OUTPUT_DIRNAME))
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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": output_dir,
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"enforce_output_dir": ("force_save_path" in config),
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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":
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return FileResponse(os.path.join(app.SD_UI_DIR, "modifiers.json"), headers=NOCACHE_HEADERS)
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elif key == "ui_plugins":
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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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def ping_internal(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:
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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):
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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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def render_internal(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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# Overwrite user specified save path
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config = app.getConfig()
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if "force_save_path" in config:
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task_data.save_to_disk_path = config["force_save_path"]
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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(
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task_data.use_stable_diffusion_model,
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task_data.use_vae_model,
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task_data.use_hypernetwork_model,
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task_data.vram_usage_level,
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)
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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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def model_merge_internal(req: dict):
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try:
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from sdkit.train import merge_models
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from easydiffusion.utils.save_utils import filename_regex
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mergeReq: MergeRequest = MergeRequest.parse_obj(req)
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merge_models(
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model_manager.resolve_model_to_use(mergeReq.model0, "stable-diffusion"),
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model_manager.resolve_model_to_use(mergeReq.model1, "stable-diffusion"),
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mergeReq.ratio,
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os.path.join(app.MODELS_DIR, "stable-diffusion", filename_regex.sub("_", mergeReq.out_path)),
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mergeReq.use_fp16,
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)
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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 stream_internal(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:
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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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def stop_internal(task: int):
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if not task:
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if (
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task_manager.current_state == task_manager.ServerStates.Online
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or task_manager.current_state == task_manager.ServerStates.Unavailable
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):
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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:
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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):
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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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def get_image_internal(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:
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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]:
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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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