Files
fet_Unizeug/app/main.py
2025-07-30 11:17:19 +02:00

710 lines
24 KiB
Python

from typing import Annotated
from typing import List, Dict, Tuple
from annotated_types import IsDigit
from fastapi import FastAPI, File, HTTPException, UploadFile, Request, Form
from fastapi.responses import FileResponse
# import multiprocessing
# import threading
# import concurrent.futures
# import asyncio
# import fastapi
from fastapi.staticfiles import StaticFiles
import pymupdf
import json
import re
import os
import mariadb
import filetype
import datetime
import logging
log = logging.getLogger(__name__)
logging.basicConfig(filename="app.log", level=logging.INFO)
debug = log.debug
info = log.info
error = log.error
app = FastAPI()
app.mount("/favicon", StaticFiles(directory="./favicon"), name="favicon")
app.mount("/static", StaticFiles(directory="./static"), name="static")
db = mariadb.connect(
host="localhost", user="wildserver", password="DBPassword", database="Unizeug"
)
CATEGORIES = [
"Prüfungen",
"Klausuren",
"Übungen",
"Labore",
"Unterlagen",
"Zusammenfassungen",
"Multimedia",
]
SUBCAT_CATEGORIES = ["Klausuren", "Übungen", "Labore"]
SUBCAT_CATEGORIES_I = [1, 2, 3]
EX_DATE_CATEGORIES = ["Prüfungen", "Klausuren"]
EX_DATE_CATEGORIES_I = [0, 1]
UNIZEUG_PATH = "./app/dest/"
FILES_IN_PROGRESS = "./app/files/"
EMPTYFILE = "./app/graphics/empty.pdf"
UNSUPPORTEDFILE = "./app/graphics/unsupported.pdf"
GREETINGFILE = "./app/graphics/greeting.pdf"
# cur = db.cursor()
# cur.execute("select * from FIP;")
# for l in cur:
# print(l)
# locpaths = ["./VO_Mathematik_3.pdf"] # replace this with a database
@app.get("/")
async def get_index():
"""gives the Index.html file"""
return FileResponse("./index.html")
@app.get("/files/{file_id}")
async def get_file(file_id: str):
"""returns the file that cooorosponds with the given ID"""
if file_id == "unsupported":
error("File is unsupported")
return FileResponse(UNSUPPORTEDFILE)
if file_id == "empty":
error("File Id empty")
return FileResponse(EMPTYFILE)
if file_id == "greeting":
return FileResponse(GREETINGFILE)
cur = db.cursor()
try:
cur.execute("Select filename from FIP where id=?", (file_id,))
except mariadb.Error as e:
print(f"Mariadb Error: {e}")
raise HTTPException(
status_code=500, detail="Somethings wrong with the database"
)
filename = cur.fetchone()[0]
return FileResponse(FILES_IN_PROGRESS + filename)
@app.get("/search/lva")
async def search_lva(
searchterm: str = "", pid: str | None = None, searchlim: int = 10
) -> List[Dict[str, int | str]]:
"""returns the LVA for a search in the database"""
res = []
zw = []
cur = db.cursor(dictionary=True)
if await is_LVID(searchterm):
cur.execute(
"SELECT id,lvid,lvname FROM LVAs WHERE lvid LIKE ?", (searchterm + "%",)
)
res = cur.fetchall()
else:
if pid is not None:
cur.execute(
"SELECT LVAs.id,LVAs.lvid,LVAs.lvname FROM LVAs LEFT JOIN LPLink ON LVAs.id=LPLink.lid WHERE lvname like ? AND pid=?",
(searchterm + "%", pid),
)
res += cur.fetchall()
cur.execute(
"SELECT LVAs.id,LVAs.lvid,LVAs.lvname FROM LVAs LEFT JOIN LPLink ON LVAs.id=LPLink.lid WHERE lvname like ? AND pid=?",
("%" + searchterm + "%", pid),
)
res += cur.fetchall()
cur.execute(
"SELECT LVAs.id,LVAs.lvid,LVAs.lvname FROM LVAs LEFT JOIN LPLink ON LVAs.id=LPLink.lid WHERE pid=?",
(pid,),
)
zw = cur.fetchall()
if searchterm != "":
cur.execute(
"SELECT id,lvid,lvname FROM LVAs WHERE lvname LIKE ?",
(searchterm + "%",),
)
res += cur.fetchall()
cur.execute(
"SELECT id,lvid,lvname FROM LVAs WHERE lvname LIKE ?",
("%" + searchterm + "%",),
)
res += cur.fetchall()
res = remove_duplicates(res + zw)
if searchlim == 0:
return res
else:
return res[:searchlim]
@app.get("/search/prof")
async def search_profs(
searchterm: str = "", lid: int | None = None, searchlim: int = 10
) -> List[Dict[str, str | int]]:
"""returns the Prof for a searchterm and LVA id"""
res = []
zw = []
cur = db.cursor(dictionary=True)
if lid is not None:
# cur.execute("SELECT id FROM LVAs WHERE LVId=?", (lvid,))
# lid = cur.fetchall()[0]["id"]
cur.execute(
"SELECT Profs.id,Profs.name FROM Profs LEFT JOIN LPLink ON Profs.id=LPLink.pid WHERE name like ? AND lid=?",
("%" + searchterm + "%", lid),
)
res = cur.fetchall()
cur.execute(
"SELECT Profs.id,Profs.name FROM Profs LEFT JOIN LPLink ON Profs.id=LPLink.pid WHERE name NOT like ? AND lid=?",
("%" + searchterm + "%", lid),
)
zw = cur.fetchall()
if searchterm != "":
cur.execute(
"SELECT id,name FROM Profs WHERE name LIKE ?", ("%" + searchterm + "%",)
)
res += cur.fetchall()
res = remove_duplicates(res + zw)
if searchlim == 0:
return res
else:
return res[:searchlim]
@app.get(
"/search/subcat"
) # NOT FULLY TESTED DUE TO INCOMPLETE DATABASE DUE TO INACCEPTABLE FOLDERSTRUCTURE
async def search_subcats(
searchterm: str = "",
lid: int | None = None,
pid: int | None = None,
cat: int | None = None,
searchlim: int = 10,
) -> List[Dict[str, str | int]]:
"""searches for avaliable subcatrgories in a specific LVA with a specific Prof(optional)"""
res = []
rest = []
cur = db.cursor(dictionary=True)
if not (lid is None or pid is None or cat is None): # Rest is available
# cur.execute("SELECT id FROM LVAs WHERE LVId=?", (lvid,))
# lid = cur.fetchall()[0]["id"]
cur.execute(
"SELECT id,name FROM SubCats WHERE lid=? AND pid=? AND cat=?",
(lid, pid, cat),
)
rest = cur.fetchall()
if searchterm != "": # searchterm is available
if not (lid is None or pid is None or cat is None):
cur.execute(
"SELECT id,name FROM SubCats WHERE lid=? AND pid=? AND cat=? AND name LIKE ?",
(lid, pid, cat, "%" + searchterm + "%"),
)
res = cur.fetchall()
cur.execute(
"SELECT id,name FROM SubCats WHERE name LIKE ?", ("%" + searchterm + "%",)
)
res += cur.fetchall()
res = remove_duplicates(res + rest)
if searchlim == 0:
return res
else:
return res[:searchlim]
# @app.post("/files/")
# async def create_file(file: Annotated[bytes, File()]):
# return {"filesize": len(file)}
@app.post("/uploadfile/")
async def create_upload_file(files: List[UploadFile], c2pdf: bool = True):
"""Handles files uploaded. generates ID; saves file; saves path in database"""
if len(files) == 0:
raise HTTPException(status_code=400, detail="No files found in file submission")
filename = files[0].filename if files[0].filename is not None else "None"
if len(files) == 1:
content = await files[0].read()
ft: str = guess_filetype(content, filename)
if c2pdf and ft != "pdf":
ret = convert_to_pdf(content)
if ret is not None:
content = ret
filename = filename_to_pdf(filename)
ft = "pdf"
else:
filecontents = []
for file in files:
content = await file.read()
ft = guess_filetype(content, filename)
if ft == "pdf":
filecontents.append(content)
continue
if c2pdf:
res = convert_to_pdf(content)
if res is None:
filename = await save_files_to_folder(files)
content = None
ft = "dir"
break
filecontents.append(res)
else:
filename = await save_files_to_folder(files)
content = None
ft = "dir"
break
else: # is executed when the loop was not broken out of
filename = filename_to_pdf(filename)
ft = "pdf"
doc = pymupdf.open()
for content in filecontents:
doc.insert_pdf(pymupdf.open("pdf", content))
content = doc.tobytes()
if ft != "dir":
filename = make_filename_unique(filename)
locpath = FILES_IN_PROGRESS + filename
# locpaths.append(locpath)
cur = db.cursor()
try:
cur.execute(
"Insert Into FIP (filename,filetype,initTimeStamp) Values(?,?,?)",
(filename, ft, str(datetime.datetime.now())),
)
except mariadb.Error as e:
print(f"Error: {e}")
raise HTTPException(
status_code=500, detail="Somethings wrong with the database"
)
try:
cur.execute("Select id From FIP where filename=?", (filename,))
except mariadb.Error as e:
print(f"Error: {e}")
raise HTTPException(
status_code=500, detail="Somethings wrong with the database"
)
id = cur.fetchone()[0]
if content is not None:
with open(locpath, "wb") as f:
f.write(content)
# app.mount("/files", StaticFiles(directory="./app/files/"), name="files")
db.commit()
fname = "".join(filename.split(".")[0:-1])
# ftype = filename.split(".")[-1]
return {
"filename": fname,
"filetype": ft,
"path": "/files/" + id,
"fid": id,
}
@app.post("/submit/")
async def get_submission(
lva: Annotated[str, Form()], # LVA Name and Number
prof: Annotated[str, Form()], # Vortragender
fname: Annotated[str, Form()], # Path to pdf File
fileId: Annotated[str, Form()], # UUID of file in FIP table
sem: Annotated[str, Form()], # Semester eg. 2024W
stype: Annotated[str, Form()], # Type of File eg. Prüfung=>0
subcat: Annotated[str, Form()], # Subcategory of file if the category has subcats
ex_date: Annotated[
str, Form()
], # Date of Exam only when type is exam(Klausur/Prüfung)
ftype: Annotated[str, Form()], # type of File
rects: Annotated[
str, Form()
], # Rechtangles # List[List[Tuple[float, float, float, float]]],
pagescales: Annotated[
str, Form()
], # Scales of Pages # Annotated[List[Dict[str, float]], Form()],
censor: Annotated[str, Form()],
):
"""handles submission"""
print(
f"lva: {lva}, prof: {prof}, fname {fname}, stype: {stype}, subcat: {subcat}, sem: {sem}, ex_date: {ex_date}, rects: {rects}, pagescales: {pagescales}, censor: {censor}"
)
info(
f"lva: {lva}, prof: {prof}, fname {fname}, stype: {stype}, subcat: {subcat}, sem: {sem}, ex_date: {ex_date}, rects: {rects}, pagescales: {pagescales}, censor: {censor}"
)
rects_p = json.loads(rects)
scales_p = json.loads(pagescales)
cur = db.cursor()
try:
cur.execute("Select filename from FIP where id=?", (fileId,))
except mariadb.Error as e:
print(f"Mariadb Error: {e}")
raise HTTPException(
status_code=500, detail="Somethings wrong with the database"
)
filepath = "./app/files/" + cur.fetchone()[0]
try:
dest = make_savepath(lva, prof, stype, subcat, sem, ex_date, fname, ftype)
except ValueError as e:
error(f"Error creating savepath: f{e}")
raise HTTPException(status_code=400, detail=str(e))
await censor_pdf(
filepath, dest, rects_p, scales_p, False if censor == "False" else True
)
# return {"done": "ok"}
print(dest)
return FileResponse(dest, content_disposition_type="inline")
async def censor_pdf(
path: str,
destpath: str,
rects: List[List[List[float]]],
scales: List[Dict[str, float]],
secure: bool,
):
"""Censors pdf and runs OCR
If Secure is True the file is converted to Pixels and then recreated; else the censored sections are just covering the text below and can be easiliy removed with e.g. Inkscape
Args:
path: path to the pdf document
destpath: Path where the result is supposed to be saved to
rects: Coordinates of rectangles to be placed on the pdf document
scales: Scales of the rects coordinates for the pdf document
secure: weather or not the pdf document is supposed to be converted into an Image (and back) to make shure, the censoring is irreversible
Returns:
None
"""
doc = pymupdf.open(path)
output = pymupdf.open()
page = doc[0]
# width = page.rect.width
# height = page.rect.height
# print(width, height)
npage = doc.page_count
# pages = []
# tasks = []
for i in range(npage):
page = doc[i]
if i < len(rects) and rects[i] != []:
print(i)
wfac = page.rect.width / scales[i]["width"]
hfac = page.rect.height / scales[i]["height"]
for rect in rects[i]:
prect = pymupdf.Rect(
rect[0] * wfac,
rect[1] * hfac,
(rect[0] + rect[2]) * wfac,
(rect[1] + rect[3]) * hfac,
)
page.draw_rect(
prect,
color=(0, 0, 0),
fill=(0, 0, 0),
)
if secure:
# pages.append(page)
bitmap = page.get_pixmap(dpi=400)
pdf_bytes = bitmap.pdfocr_tobytes(
language="deu",
tessdata="/usr/share/tessdata/", # tesseract needs to be installed; this is the path to thetesseract files
)
output.insert_pdf(pymupdf.Document(stream=pdf_bytes))
# tasks.append(asyncio.create_task(censor_page(page)))
print(f"Page {i + 1}/{npage}: CENSORING DONE")
else:
output.insert_pdf(doc, i, i)
# if secure:
# pages_bytes: List[bytes] = []
# censor_page(pages[0])
# with multiprocessing.Pool(npage) as p:
# pages_bytes = p.map(censor_page, pages)
# pages_bytes = p.map(test_function, [1, 2, 3, 4])
# for pdf_bytes in pages_bytes:
# output.insert_pdf(pymupdf.Document(stream=pdf_bytes))
# with concurrent.futures.ThreadPoolExecutor() as executor:
# futures = []
# for page in pages:
# futures.append(executor.submit(censor_page, page))
# for future in futures:
# output.insert_pdf(pymupdf.Document(stream=future.result()))
#
# for task in tasks:
# output.insert_pdf(pymupdf.Document(stream=await task))
# print("CENSORING DONE")
output.save(destpath)
def test_function(i: int) -> bytes:
return b"\x00\x66\x99"
async def censor_page(page: pymupdf.Page) -> bytes:
bitmap = page.get_pixmap(dpi=400)
pdf_bytes = bitmap.pdfocr_tobytes(
language="deu",
tessdata="/usr/share/tessdata/", # tesseract needs to be installed; this is the path to thetesseract files
)
# print(pdf_bytes)
return pdf_bytes
# def save_without_censoring(dest)
async def is_LVID(term: str) -> bool:
"""Returns weather a string has the format of a LVA ID"""
if re.match(r"[a-zA-Z0-9]{3}\.[a-zA-Z0-9]*", term):
return True
if term.isdigit():
return True
return False
def remove_duplicates(
results: List[Dict[str, str | int]],
) -> List[Dict[str, str | int]]:
"""removes duplicate file Ids"""
ids = []
res = []
for result in results:
if result["id"] in ids:
continue
ids.append(result["id"])
res.append(result)
return res
def make_savepath(
lva: str,
prof: str,
cat: str,
subcat: str,
sem: str,
ex_date: str,
fname: str,
ftype: str,
) -> str:
"""Generates the path, the file is saved to after the upload process is finished. It creates all nessecery directories."""
lv = get_lvpath(lva)
lvpath = lv[1] + "/"
pf = get_profpath(prof, lv[0])
pfpath = pf[1] + "/"
catpath = CATEGORIES[int(cat)] + "/"
scpath = ""
if int(cat) in SUBCAT_CATEGORIES_I and subcat != "":
sc = get_subcatpath(subcat, int(cat), pf[0], lv[0])
scpath = sc[1] + "/"
if int(cat) == 6:
savepath = UNIZEUG_PATH + lv[1] + "_Multimedia_only/" + pfpath
else:
savepath = UNIZEUG_PATH + lvpath + pfpath + catpath + scpath
os.makedirs(savepath, exist_ok=True)
filename = sem + "_"
if int(cat) in EX_DATE_CATEGORIES_I:
_, mm, dd = ex_date.split("-")
filename += mm + "_" + dd + "_"
filename += fname + "." + ftype
return savepath + filename
def get_lvpath(lva: str) -> Tuple[int, str]:
"""returns the path in UNIZEUG from a LVA based on its LVID (or name) that may be within a string. It uses the path within the database. If there is no Entry with a fitting LVID in the database it creates a new LVA. Returns: (id,path)"""
cur = db.cursor()
lvid = re.search(r"[a-zA-Z0-9]{3}\.[a-zA-Z0-9]{3}", lva)
if lvid is not None:
cur.execute(
"SELECT id,lvpath FROM LVAs WHERE lvid=?",
(lvid.group()[:3] + lvid.group()[4:],),
)
res = cur.fetchone()
if res is not None:
return res
else:
return makenew(lva, "LVAs")
else:
cur.execute("SELECT id,lvpath FROM LVAs WHERE lvname=?", (lva,))
res = cur.fetchone()
if res is not None:
return res
else:
return makenew(lva, "LVAs")
def get_profpath(prof: str, lid: int) -> Tuple[int, str]:
"""Generates the foldername for a prof based on his name. It searches the database for matches. Returns: (id,name)"""
cur = db.cursor()
prof = prof.replace("_", " ")
cur.execute("SELECT id,name FROM Profs WHERE name=?", (prof,))
res = cur.fetchall()
print(res != [])
if res is not None and res != []:
ret = (res[0][0], res[0][1].replace(" ", "_"))
cur.execute("SELECT * FROM LPLink WHERE LId=? AND PId=?", (lid, ret[0]))
if cur.fetchall() is None:
linkLP(lid, ret[0])
return ret
fname, lname = prof.split(" ")
cur.execute("SELECT id,name FROM Profs WHERE name like ?", (lname + " " + fname,))
res = cur.fetchall()
if res is not None and res != []:
ret = (res[0][0], res[0][1].replace(" ", "_"))
cur.execute("SELECT * FROM LPLink WHERE LId=? AND PId=?", (lid, ret[0]))
if cur.fetchall() is None:
linkLP(lid, ret[0])
return ret
ret = makenew(prof, "Profs")
linkLP(lid, ret[0])
return ret
def get_subcatpath(subcat: str, cat: int, pid: int, lid: int) -> Tuple[int, str]:
"""Generates the subcat path from a subcat name. Returns: (id,name)"""
cur = db.cursor()
cur.execute(
"SELECT id,name FROM SubCats WHERE LId=? AND PId=? AND cat=? AND name=?",
(lid, pid, cat, subcat),
)
res = cur.fetchone()
if res is None:
return makenew(subcat, "SubCats", LId=lid, PId=pid, cat=cat)
return res
def makenew(input: str, table: str, **kwargs) -> Tuple[int, str]:
"""Generates new Entrys in the database for LVAs, Profs, SUBCATS. Returns: (id,name/path)"""
cur = db.cursor()
if table == "LVAs":
lvaid = re.search(r"[a-zA-Z0-9]{3}\.[a-zA-Z0-9]{3}", input)
if lvaid is None:
raise ValueError("LVA needs to have a LVA ID to be inserted into the table")
lvid = lvaid.group()[:3] + lvaid.group()[4:]
lvname = re.sub(r"[_ -]*[a-zA-Z0-9]{3}\.[a-zA-Z0-9]{3}[_ -]*", "", input)
lvpath = lvname + "_" + lvaid.group()
cur.execute(
"INSERT INTO LVAs(lvid,lvname,lvpath) VALUES(?,?,?)", (lvid, lvname, lvpath)
)
cur.execute("SELECT id,lvpath FROM LVAs WHERE lvid=?", (lvid,))
db.commit()
return cur.fetchone()
querry = "INSERT INTO " + table + "(name"
values = [input]
nvals = 0
for k, v in kwargs.items():
values.append(v)
querry += "," + k
nvals += 1
querry += ") VALUES(?" + nvals * ",?" + ")"
cur.execute(querry, tuple(values))
cur.execute("SELECT id,name FROM " + table + " WHERE name=?", (input,))
res = cur.fetchone()
db.commit()
if table == "Profs":
return (res[0], res[1].replace(" ", "_"))
return res
def linkLP(lid: int, pid: int):
"""declares that a Prof (id in database) offers a LVA (id in database)"""
cur = db.cursor()
cur.execute("INSERT INTO LPLink(LId,PId) VALUES(?,?)", (lid, pid))
db.commit()
def convert_to_pdf(file: bytes) -> bytes | None:
"""Converts an image(thats all thats implemented right now) into a pdf."""
# ft = filetype.guess(file)
# cid = hash(file)
# if (
# ft.mime
# == "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
# ):
# with open(f"./app/convert_temp/input{cid}.docx", "wb") as f:
# f.write(file)
# docx2pdf.convert(
# f"./app/convert_temp/input{cid}.docx", f"./app/convert_temp/output{cid}.pdf"
# )
# with open(f"./app/convert_temp/output{cid}.pdf", "rb") as f:
# cont = f.read()
# os.remove(f"./app/convert_temp/input{cid}.docx")
# os.remove(f"./app/convert_temp/output{cid}.pdf")
# return cont
# elif (
# ft.mime
# == "application/vnd.openxmlformats-officedocument.presentationml.presentation"
# ):
# with open("f./app/convert_temp/input{cid}.pptx", "wb") as f:
# f.write(file)
# pptxtopdf.convert(
# f"./app/convert_temp/input{cid}.pptx", f"./app/convert_temp/output{cid}.pdf"
# )
# with open(f"./app/convert_temp/output{cid}.pdf", "rb") as f:
# cont = f.read()
# os.remove(f"./app/convert_temp/input{cid}.pptx")
# os.remove(f"./app/convert_temp/output{cid}.pdf")
# return cont
try:
doc = pymupdf.Document(stream=file)
return doc.convert_to_pdf()
except (pymupdf.mupdf.FzErrorUnsupported, pymupdf.FileDataError) as e:
error(f"Error converting Image to pdf file: {e}")
print(e)
return None
def filename_to_pdf(filename: str) -> str:
"""converts any filename.any to filename.pdf"""
farr = filename.split(".")
if len(farr) > 1:
farr[-1] = "pdf"
filename = ".".join(farr)
else:
filename = filename + ".pdf"
return filename
def make_filename_unique(filename: str, idx: int | None = None) -> str:
"""makes sure, there are no duplicate filenames in the temporary folder"""
cur = db.cursor()
cur.execute("SELECT id FROM FIP WHERE filename=?", (filename,))
res = cur.fetchall()
if res is not None and len(res) > 0:
farr = filename.split(".")
if len(farr) > 1:
farr[-2] = (
farr[-2][:-1] + str(idx + 1) if idx is not None else farr[-2] + "_0"
)
filename = ".".join(farr)
else:
filename = (
filename[:-1] + str(idx + 1) if idx is not None else filename + "_0"
)
idx = 0 if idx is None else idx + 1
idx = idx if idx < 10 else idx - 10
filename = make_filename_unique(filename, idx)
return filename
async def save_files_to_folder(files: List[UploadFile]) -> str:
"""saves file to files in prograss folder"""
filename = files[0].filename if files[0].filename is not None else "None"
filename = filename.split(".")[0]
if filename == "":
filename = "None"
filename = make_filename_unique(filename)
os.mkdir(FILES_IN_PROGRESS + filename)
for idx, file in enumerate(files):
fn = file.filename if file.filename is not None else "None" + str(idx)
with open(FILES_IN_PROGRESS + filename + "/" + fn, "wb") as f:
f.write(await file.read())
return filename
# async def get_submittion(request: Request):
# reqJson = await request.form()
# print(reqJson)
# return {"done": "ok"}
def guess_filetype(content: bytes, filename: str) -> str:
"""Guesses the filetype of a file based on first the sontent, If that fails the extension in teh filename. If no conclusion can be reached it reutrns an empty string"""
ftyp = filetype.guess(content)
if ftyp is not None:
return ftyp.extension
farr = filename.split(".")
if len(farr) > 1:
return filename.split(".")[-1]
return ""