initial prototype by borrowing contracts

modules/api/api.py

@@ -0,0 +1,60 @@
+from modules.api.processing import StableDiffusionProcessingAPI
+from modules.processing import StableDiffusionProcessingTxt2Img, process_images
+import modules.shared as shared
+import uvicorn
+from fastapi import FastAPI, Body, APIRouter
+from fastapi.responses import JSONResponse
+from pydantic import BaseModel, Field, Json
+import json
+import io
+import base64
+
+app = FastAPI()
+
+class TextToImageResponse(BaseModel):
+    images: list[str] = Field(default=None, title="Image", description="The generated image in base64 format.")
+    parameters: Json
+    info: Json
+
+
+class Api:
+    def __init__(self, txt2img, img2img, run_extras, run_pnginfo):
+        self.router = APIRouter()
+        app.add_api_route("/v1/txt2img", self.text2imgapi, methods=["POST"])
+
+    def text2imgapi(self, txt2imgreq: StableDiffusionProcessingAPI ):
+        print(txt2imgreq)
+        p = StableDiffusionProcessingTxt2Img(**vars(txt2imgreq))
+        p.sd_model = shared.sd_model
+        print(p)
+        processed = process_images(p)
+        
+        b64images = []
+        for i in processed.images:
+            buffer = io.BytesIO()
+            i.save(buffer, format="png")
+            b64images.append(base64.b64encode(buffer.getvalue()))
+        
+        response = {
+            "images": b64images,
+            "info": processed.js(),
+            "parameters": json.dumps(vars(txt2imgreq))
+        }
+        
+
+        return TextToImageResponse(images=b64images, parameters=json.dumps(vars(txt2imgreq)), info=json.dumps(processed.info))
+        
+        
+
+    def img2imgendoint(self):
+        raise NotImplementedError
+
+    def extrasendoint(self):
+        raise NotImplementedError
+
+    def pnginfoendoint(self):
+        raise NotImplementedError
+
+    def launch(self, server_name, port):
+        app.include_router(self.router)
+        uvicorn.run(app, host=server_name, port=port)

modules/processing.py

@@ -723,4 +723,4 @@ class StableDiffusionProcessingImg2Img(StableDiffusionProcessing):
         del x
         devices.torch_gc()
 
-        return samples
+        return samples

modules/shared.py

@@ -74,7 +74,7 @@ parser.add_argument("--disable-console-progressbars", action='store_true', help=
 parser.add_argument("--enable-console-prompts", action='store_true', help="print prompts to console when generating with txt2img and img2img", default=False)
 parser.add_argument('--vae-path', type=str, help='Path to Variational Autoencoders model', default=None)
 parser.add_argument("--disable-safe-unpickle", action='store_true', help="disable checking pytorch models for malicious code", default=False)
-
+parser.add_argument("--api", action='store_true', help="use api=True to launch the api instead of the webui")
 
 cmd_opts = parser.parse_args()
 restricted_opts = [

webui.py

@@ -97,40 +97,51 @@ def webui():
         os._exit(0)
 
     signal.signal(signal.SIGINT, sigint_handler)
+    
+    if cmd_opts.api:
+        from modules.api.api import Api
+        api = Api(txt2img=modules.txt2img.txt2img,
+          img2img=modules.img2img.img2img,
+          run_extras=modules.extras.run_extras,
+          run_pnginfo=modules.extras.run_pnginfo)
 
-    while 1:
-
-        demo = modules.ui.create_ui(wrap_gradio_gpu_call=wrap_gradio_gpu_call)
-        
-        app, local_url, share_url = demo.launch(
-            share=cmd_opts.share,
-            server_name="0.0.0.0" if cmd_opts.listen else None,
-            server_port=cmd_opts.port,
-            debug=cmd_opts.gradio_debug,
-            auth=[tuple(cred.split(':')) for cred in cmd_opts.gradio_auth.strip('"').split(',')] if cmd_opts.gradio_auth else None,
-            inbrowser=cmd_opts.autolaunch,
-            prevent_thread_lock=True
-        )
-        
-        app.add_middleware(GZipMiddleware, minimum_size=1000)
+        api.launch(server_name="0.0.0.0" if cmd_opts.listen else "127.0.0.1",
+                   port=cmd_opts.port if cmd_opts.port else 7861)
 
+    else:
         while 1:
-            time.sleep(0.5)
-            if getattr(demo, 'do_restart', False):
-                time.sleep(0.5)
-                demo.close()
-                time.sleep(0.5)
-                break
 
-        sd_samplers.set_samplers()
+            demo = modules.ui.create_ui(wrap_gradio_gpu_call=wrap_gradio_gpu_call)
 
-        print('Reloading Custom Scripts')
-        modules.scripts.reload_scripts(os.path.join(script_path, "scripts"))
-        print('Reloading modules: modules.ui')
-        importlib.reload(modules.ui)
-        print('Refreshing Model List')
-        modules.sd_models.list_models()
-        print('Restarting Gradio')
+            app, local_url, share_url = demo.launch(
+                share=cmd_opts.share,
+                server_name="0.0.0.0" if cmd_opts.listen else None,
+                server_port=cmd_opts.port,
+                debug=cmd_opts.gradio_debug,
+                auth=[tuple(cred.split(':')) for cred in cmd_opts.gradio_auth.strip('"').split(',')] if cmd_opts.gradio_auth else None,
+                inbrowser=cmd_opts.autolaunch,
+                prevent_thread_lock=True
+            )
+
+            app.add_middleware(GZipMiddleware, minimum_size=1000)
+
+            while 1:
+                time.sleep(0.5)
+                if getattr(demo, 'do_restart', False):
+                    time.sleep(0.5)
+                    demo.close()
+                    time.sleep(0.5)
+                    break
+
+            sd_samplers.set_samplers()
+
+            print('Reloading Custom Scripts')
+            modules.scripts.reload_scripts(os.path.join(script_path, "scripts"))
+            print('Reloading modules: modules.ui')
+            importlib.reload(modules.ui)
+            print('Refreshing Model List')
+            modules.sd_models.list_models()
+            print('Restarting Gradio')
 
 
 if __name__ == "__main__":