image router

api/ovkiosk/routers/__init__.py

@@ -7,10 +7,11 @@ This file: Main API router definition.
 from fastapi import APIRouter
 
 from ..config import SETTINGS
-from . import text
+from . import image, text
 
 main_router = APIRouter(prefix=f"/{SETTINGS.api_v1_prefix}")
 main_router.include_router(text.router)
+main_router.include_router(image.router)
 
 __all__ = [
     "main_router",

api/ovkiosk/routers/image.py

@@ -0,0 +1,112 @@
+import io
+import logging
+import re
+from typing import Iterator
+
+from fastapi import APIRouter, Depends, HTTPException, status
+from fastapi.responses import StreamingResponse
+from PIL import Image
+from webdav3.exceptions import RemoteResourceNotFound
+
+from .. import CLIENT
+from ..dav_file import DavFile
+
+_logger = logging.getLogger(__name__)
+
+router = APIRouter(prefix="/image", tags=["image"])
+
+
+@router.on_event("startup")
+async def on_startup():
+    _logger.debug("image router started")
+
+
+_re_image_file = re.compile(
+    r"\.(gif|jpe?g|tiff?|png|bmp)$",
+    flags=re.IGNORECASE,
+)
+
+
+async def get_image_file_names() -> Iterator[str]:
+    try:
+        file_names = CLIENT.list("img")
+
+        return (
+            name
+            for name in file_names
+            if _re_image_file.search(name)
+        )
+
+    except RemoteResourceNotFound:
+        pass
+
+
+@router.get("/list", response_model=list[str])
+async def list_images(
+    image_file_names: Iterator[str] = Depends(get_image_file_names),
+) -> list[str]:
+    return list(image_file_names)
+
+
+async def find_file_names(
+    prefix: str = "",
+    image_file_names: Iterator[str] = Depends(get_image_file_names),
+) -> Iterator[str]:
+    return (
+        file_name
+        for file_name in image_file_names
+        if file_name.lower().startswith(prefix.lower())
+    )
+
+
+@router.get("/find/{prefix}", response_model=list[str])
+async def find_images(
+    file_names: Iterator[str] = Depends(find_file_names),
+) -> list[str]:
+    return list(file_names)
+
+
+@router.get(
+    "/get/{prefix}",
+    responses={
+        status.HTTP_200_OK: {
+            "description": "Operation successful",
+        },
+        status.HTTP_404_NOT_FOUND: {
+            "description": "image file not found",
+            "content": None,
+        },
+        status.HTTP_409_CONFLICT: {
+            "description": "ambiguous image file name",
+            "content": None,
+        },
+    },
+)
+async def get_image(
+    prefix: str,
+    file_names: Iterator[str] = Depends(find_file_names),
+) -> StreamingResponse:
+    file_names = list(file_names)
+
+    if not (file_names := list(file_names)):
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND)
+
+    elif len(file_names) > 1:
+        raise HTTPException(status_code=status.HTTP_409_CONFLICT)
+
+    file_name = file_names[0]
+    file = DavFile(CLIENT.resource(f"img/{file_name}"), refresh=False)
+    await file.download()
+    img = Image.open(io.BytesIO(file.bytes)).convert("RGB")
+
+    img_buffer = io.BytesIO()
+    img.save(img_buffer, format='JPEG', quality=85)
+    img_buffer.seek(0)
+
+    return StreamingResponse(
+        img_buffer,
+        media_type="image/jpeg",
+        headers={
+            "Content-Disposition": f"filename={prefix}.jpg"
+        },
+    )

api/poetry.lock

@@ -157,6 +157,18 @@ importlib-metadata = {version = ">=4.4", markers = "python_version < \"3.10\""}
 [package.extras]
 testing = ["coverage", "pyyaml"]
 
+[[package]]
+name = "pillow"
+version = "9.2.0"
+description = "Python Imaging Library (Fork)"
+category = "main"
+optional = false
+python-versions = ">=3.7"
+
+[package.extras]
+docs = ["furo", "olefile", "sphinx (>=2.4)", "sphinx-copybutton", "sphinx-issues (>=3.0.1)", "sphinx-removed-in", "sphinxext-opengraph"]
+tests = ["check-manifest", "coverage", "defusedxml", "markdown2", "olefile", "packaging", "pyroma", "pytest", "pytest-cov", "pytest-timeout"]
+
 [[package]]
 name = "pydantic"
 version = "1.9.2"
@@ -351,7 +363,7 @@ testing = ["func-timeout", "jaraco.itertools", "pytest (>=6)", "pytest-black (>=
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.9"
-content-hash = "136b9208bffca16de395a3444ca9d172d7e6d7e40866eea987174fa7b69822c7"
+content-hash = "b39654ea53ee894dd65fe2217ca58fea259c9fe8a9bbae26f6198c42304608e2"
 
 [metadata.files]
 anyio = [
@@ -470,6 +482,66 @@ markdown = [
     {file = "Markdown-3.4.1-py3-none-any.whl", hash = "sha256:08fb8465cffd03d10b9dd34a5c3fea908e20391a2a90b88d66362cb05beed186"},
     {file = "Markdown-3.4.1.tar.gz", hash = "sha256:3b809086bb6efad416156e00a0da66fe47618a5d6918dd688f53f40c8e4cfeff"},
 ]
+pillow = [
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 pydantic = [
     {file = "pydantic-1.9.2-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:9c9e04a6cdb7a363d7cb3ccf0efea51e0abb48e180c0d31dca8d247967d85c6e"},
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api/pyproject.toml

@@ -12,6 +12,7 @@ uvicorn = "^0.18.3"
 webdavclient3 = "3.14.5"
 Markdown = "^3.4.1"
 APScheduler = "^3.9.1"
+Pillow = "^9.2.0"
 
 [tool.poetry.dev-dependencies]
 # pytest = "^5.2"