openwebrx-clone/owrx/controllers/imageupload.py

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from owrx.controllers import BodySizeError
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from owrx.controllers.assets import AssetsController
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from owrx.controllers.admin import AuthorizationMixin
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from owrx.config.core import CoreConfig
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from owrx.form.input.gfx import AvatarInput, TopPhotoInput
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import uuid
import json
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class ImageUploadController(AuthorizationMixin, AssetsController):
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# max upload filesizes
max_sizes = {
# not the best idea to instantiate inputs, but i didn't want to duplicate the sizes here
"receiver_avatar": AvatarInput("id", "label").getMaxSize(),
"receiver_top_photo": TopPhotoInput("id", "label").getMaxSize(),
}
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def __init__(self, handler, request, options):
super().__init__(handler, request, options)
self.file = request.query["file"][0] if "file" in request.query else None
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def getFilePath(self, file=None):
if self.file is None:
raise FileNotFoundError("missing filename")
return "{tmp}/{file}".format(
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tmp=CoreConfig().get_temporary_directory(),
file=self.file
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)
def indexAction(self):
self.serve_file(None)
def _is_png(self, contents):
return contents[0:8] == bytes([0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A])
def _is_jpg(self, contents):
return contents[0:3] == bytes([0xFF, 0xD8, 0xFF])
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def _is_webp(self, contents):
return contents[0:4] == bytes([0x52, 0x49, 0x46, 0x46]) and contents[8:12] == bytes([0x57, 0x45, 0x42, 0x50])
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def processImage(self):
if "id" not in self.request.query:
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self.send_json_response({"error": "missing id"}, code=400)
return
file_id = self.request.query["id"][0]
if file_id not in ImageUploadController.max_sizes:
self.send_json_response({"error": "unexpected image id"}, code=400)
return
try:
contents = self.get_body(ImageUploadController.max_sizes[file_id])
except BodySizeError:
self.send_json_response({"error": "file size too large"}, code=400)
return
filetype = None
if self._is_png(contents):
filetype = "png"
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elif self._is_jpg(contents):
filetype = "jpg"
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elif self._is_webp(contents):
filetype = "webp"
if filetype is None:
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self.send_json_response({"error": "unsupported file type"}, code=400)
return
self.file = "{id}-{uuid}.{ext}".format(
id=file_id,
uuid=uuid.uuid4().hex,
ext=filetype,
)
with open(self.getFilePath(), "wb") as f:
f.write(contents)
self.send_json_response({"file": self.file}, code=200)
def send_json_response(self, obj, code):
self.send_response(json.dumps(obj), code=code, content_type="application/json")