Changed response format and added its schema, fixed some errors

app/epub.py

@@ -1,5 +1,6 @@
 import aiofiles as aiof
 from base64 import b64encode
+from fastapi import HTTPException
 
 import ebooklib
 from ebooklib import epub
@@ -8,6 +9,7 @@ from tempfile import SpooledTemporaryFile
 
 from .utils import Document_Tokens
 
+
 async def epub2html(file: SpooledTemporaryFile) -> str:
 
     """
@@ -22,10 +24,12 @@ async def epub2html(file: SpooledTemporaryFile) -> str:
         # TODO: join tokens to HTML
         html_content = ""
         ...
-        return html_content
+        return {**(tokens["metadata"]), "content": html_content}
 
     except Exception as e:
-        return "Error! Wrong epub file format: " + str(e)
+        raise HTTPException(
+            status_code=500, detail="Error! Wrong epub file format: " + str(e)
+        )
 
 
 async def epub_to_tokens(file: SpooledTemporaryFile) -> Document_Tokens:
@@ -89,4 +93,4 @@ def convert_list(titles_list: list[tuple[str, dict[str, str]]]):
     for title_obj in titles_list:
         res.append(title_obj[0])
 
-    return "; ".join(res)
+    return "; ".join(res)

app/fb2.py

@@ -1,7 +1,8 @@
 from tempfile import SpooledTemporaryFile
 import xml.etree.ElementTree as ET
 from xml.etree.ElementTree import Element
-from typing import Optional
+from typing import Optional, Union
+from fastapi import HTTPException
 
 from .utils import Document_Tokens
 
@@ -13,21 +14,23 @@ namespaces = {
 HREF = f"{{{namespaces['xlink']}}}href"
 
 
-async def fb22html(file: SpooledTemporaryFile) -> str:
+async def fb22html(file: SpooledTemporaryFile) -> dict[str, str]:
 
     """
     Splits fb2 to tokens and joins them to one html file
     """
 
     try:
-
         tokens = fb22tokens(file)
+        set_cover(tokens)
         html_content = fb2body2html(tokens)
 
-        return html_content
+        return {**(tokens["metadata"]), "content": html_content}
 
     except Exception as e:
-        return "Error! Wrong FB2 file format: " + str(e)
+        raise HTTPException(
+            status_code=500, detail="Error! Wrong fb2 file format: " + str(e)
+        )
 
 
 def fb22tokens(file: SpooledTemporaryFile) -> Document_Tokens:
@@ -46,7 +49,10 @@ def fb22tokens(file: SpooledTemporaryFile) -> Document_Tokens:
     """
 
     tokens = {
-        "metadata": {},
+        "metadata": {
+            "title": "",
+            "author": "",
+        },
         "content": b"<root>",
     }
 
@@ -59,13 +65,13 @@ def fb22tokens(file: SpooledTemporaryFile) -> Document_Tokens:
 
     # Reading book metadata
 
-    book_info = description.find("title-info")
+    book_info = description.find("./title-info", namespaces)
     if book_info:
         metadata = {}
-        metadata["title"] = book_info.find("book-title", namespaces).text
+        metadata["title"] = book_info.find("./book-title", namespaces).text
-        metadata["author"] = get_author(book_info.find("author", namespaces))
+        metadata["author"] = get_author(book_info.find("./author", namespaces))
-        metadata["cover"] = get_cover(book_info.find("coverpage", namespaces))
+        metadata["cover"] = get_cover(book_info.find("./coverpage", namespaces))
-        if metadata["cover"] is None:
+        if not 'cover' in metadata.keys():
             metadata.pop("cover")
 
         if len(metadata.keys()):
@@ -101,11 +107,11 @@ def get_author(author: Element) -> str:
         "middle-name",
         "last-name",
     ):
-        el = author.find(tag_name, namespaces)
+        el = author.find("./" + tag_name, namespaces)
         if not el is None:
             res.append(el.text)
     if len(res) == 0:
-        res = author.find("nickname", namespaces).text
+        res = author.find("./nickname", namespaces).text
     else:
         res = " ".join(res)
 
@@ -119,7 +125,15 @@ def get_cover(coverpage: Optional[Element]) -> Optional[str]:
     """
 
     if coverpage:
-        return coverpage.find("image", namespaces).get(HREF)
+        return coverpage.find("./image", namespaces).get(HREF)
+
+
+def set_cover(tokens: Document_Tokens) -> None:
+    cover = tokens["metadata"]["cover"]
+    if cover is None:
+        tokens["metadata"]["cover"] = "none"
+    elif cover[0] == "#":
+        tokens["metadata"]["cover"] = tokens[cover[1:]]
 
 
 def fb2body2html(tokens: Document_Tokens) -> str:

app/main.py

@@ -1,8 +1,10 @@
-from fastapi import FastAPI, File, UploadFile
+from fastapi import FastAPI, File, UploadFile, HTTPException
 from fastapi.responses import HTMLResponse
+from typing import Union
 
 from .epub import epub2html
 from .fb2 import fb22html
+from .utils import HTMLBook
 
 app = FastAPI()
 
@@ -12,14 +14,12 @@ def root():
     return "Hello, World!"
 
 
-@app.post(
+@app.post("/uploadfile/", response_model=HTMLBook)
-    "/uploadfile/",
-)
 async def create_upload_file(file: UploadFile = File(...)):
     if file.filename.endswith(".epub"):
         content = await epub2html(file.file)
     elif file.filename.endswith(".fb2"):
         content = await fb22html(file.file)
     else:
-        content = "Error! Unsupported file type"
+        raise HTTPException(status_code=415, detail="Error! Unsupported file type")
-    return HTMLResponse(content=content)
+    return content

app/utils.py

@@ -1,3 +1,11 @@
-from typing import Union
+from typing import Union, Optional
+from pydantic import BaseModel
 
-Document_Tokens = dict[str, Union[str, dict[str, str]]]
+Document_Tokens = dict[str, Union[str, dict[str, str]]]
+
+
+class HTMLBook(BaseModel):
+    title: str
+    author: str
+    cover: Optional[str]
+    content: str