Deployed to vercel

Updated deployment instructions
Switched to alpine python image

.gitignore

@@ -1,3 +1,4 @@
 .venv
 __pycache__/
-.vscode
+.vscode
+.vercel

Dockerfile

@@ -1,4 +1,4 @@
-FROM python
+FROM python:alpine
 
 WORKDIR /srv
 
@@ -6,8 +6,6 @@ COPY ./requirements /srv/requirements
 
 RUN pip install -r requirements/prod.txt
 
-EXPOSE 80
-
 COPY ./app /srv/app
 
-CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "80"]
+CMD uvicorn app.main:app --host 0.0.0.0 --port ${PORT:-8081}

README.md

@@ -42,12 +42,22 @@ Simple docker deployment
 docker build . -t publite_backend
 
 # run it with docker
-docker run -p <port>:80 publite_backend
+docker run -p <port>:8081 publite_backend
 ```
 
 Dokku deployment with image from Docker Hub
 
 ```bash
 dokku apps:create publitebackend
+
+# increase file size limit to be able to upload bigger books
+dokku nginx:set publitebackend client_max_body_size 50m
+
 dokku git:from-image publitebackend publite/backend:latest
 ```
+
+# TODO
+
+- Separate epub and fb2 files to python modules
+- Rewrite own `.opf` file parsing to get rid of dependency on EbookLib
+- Add cli interfaces for epub and fb2 libs

api

@@ -0,0 +1 @@
+app

app/epub.py

@@ -8,7 +8,7 @@ from base64 import b64encode
 from functools import cache
 from tempfile import SpooledTemporaryFile
 
-import aiofiles as aiof
+import aiofiles
 import ebooklib
 from ebooklib import epub
 from fastapi import HTTPException
@@ -61,7 +61,7 @@ async def epub_to_tokens(
 
     tokens = {}
 
-    async with aiof.tempfile.NamedTemporaryFile() as tmp:
+    async with aiofiles.tempfile.NamedTemporaryFile() as tmp:
         await tmp.write(file.read())
 
         # Reading book file
@@ -108,7 +108,6 @@ async def epub_to_tokens(
 
 
 def read_metadata(book: epub.EpubBook) -> dict[str, str]:
-
     """
     Reads metadata from xml to dict
     """
@@ -121,7 +120,6 @@ def read_metadata(book: epub.EpubBook) -> dict[str, str]:
 
 
 def convert_list(titles_list: list[tuple[str, dict[str, str]]]) -> str:
-
     """
     Joins titles list to one string
     """
@@ -134,7 +132,6 @@ def convert_list(titles_list: list[tuple[str, dict[str, str]]]) -> str:
 
 
 def set_cover(tokens: DocumentTokens) -> None:
-
     """
     Converts cover file name to base64 image stored in `tokens`
     """
@@ -145,7 +142,6 @@ def set_cover(tokens: DocumentTokens) -> None:
 
 
 def epub_tokens2html(spine: list[tuple[str, str]], tokens: DocumentTokens) -> bytes:
-
     """
     Joins chapters in `spice` to one html string
     """
@@ -157,11 +153,10 @@ def epub_tokens2html(spine: list[tuple[str, str]], tokens: DocumentTokens) -> by
         if file_path:
             res += process_xhtml(file_path, tokens)
 
-    return html.escape(html.unescape(res))
+    return html.unescape(res)
 
 
 def process_xhtml(path: str, tokens: DocumentTokens) -> bytes:
-
     """
     Processes content of one xml body
     """
@@ -179,7 +174,6 @@ def process_xhtml(path: str, tokens: DocumentTokens) -> bytes:
 
 
 def process_content(node: etree.Element, path: str, tokens: DocumentTokens) -> None:
-
     """
     Recursive function for xml element convertion to valid html
     """
@@ -219,7 +213,6 @@ def process_content(node: etree.Element, path: str, tokens: DocumentTokens) -> N
 
 
 def process_a_element(node: etree.Element, path: str):
-
     r"""
     Converts `filed` links to ids in \<a\> element
     """
@@ -237,7 +230,6 @@ def process_a_element(node: etree.Element, path: str):
 
 
 def process_media_element(node: etree.Element, path: str, tokens: DocumentTokens):
-
     """
     Replaces file paths to base64 encoded media in `src` and `srcset` tags
     """
@@ -256,7 +248,6 @@ def process_media_element(node: etree.Element, path: str, tokens: DocumentTokens
 
 
 def rel_to_abs_path(parent: str, rel: str):
-
     """
     Helper for relative path to media convertion to absolute
     """
@@ -266,7 +257,6 @@ def rel_to_abs_path(parent: str, rel: str):
 
 @cache
 def path_to_name(path: str) -> str:
-
     """
     Helper function for getting file name
     """
@@ -275,7 +265,6 @@ def path_to_name(path: str) -> str:
 
 
 def children_to_html(root: etree.Element) -> bytes:
-
     """
     Converts all xml children of element to string and joins them
     """

app/fb2.py

@@ -32,7 +32,7 @@ async def fb22html(file: SpooledTemporaryFile) -> HTMLBook:
 
         return {
             **(tokens["metadata"]),
-            "content": html.escape(html.unescape(html_content.decode())),
+            "content": html.unescape(html_content.decode()),
         }
 
     except Exception as err:
@@ -42,7 +42,6 @@ async def fb22html(file: SpooledTemporaryFile) -> HTMLBook:
 
 
 def fb22tokens(file: SpooledTemporaryFile) -> DocumentTokens:
-
     r"""
     Parses fb2 file as xml document.
     It puts book metadata, its content and media to `tokens` dictionary and returns it.
@@ -78,7 +77,8 @@ def fb22tokens(file: SpooledTemporaryFile) -> DocumentTokens:
         metadata = {}
         metadata["title"] = book_info.find("./book-title", namespaces).text
         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 "cover" not in metadata.keys():
             metadata.pop("cover")
 
@@ -104,7 +104,6 @@ def fb22tokens(file: SpooledTemporaryFile) -> DocumentTokens:
 
 
 def get_author(author: Element) -> str:
-
     """
     Converts author xml structure to string
     """
@@ -116,7 +115,7 @@ def get_author(author: Element) -> str:
         "last-name",
     ):
         tag = author.find("./" + tag_name, namespaces)
-        if tag is not None:
+        if tag is not None and tag.text is not None:
             res.append(tag.text)
     if len(res) == 0:
         res = author.find("./nickname", namespaces).text
@@ -127,7 +126,6 @@ def get_author(author: Element) -> str:
 
 
 def get_cover(coverpage: Optional[Element]) -> Optional[str]:
-
     """
     Extracts cover image id if exists
     """
@@ -148,7 +146,6 @@ def set_cover(tokens: DocumentTokens) -> None:
 
 
 def fb2body2html(tokens: DocumentTokens) -> str:
-
     """
     Convert fb2 xml to html, joins bodies into one string
     """
@@ -163,7 +160,6 @@ def fb2body2html(tokens: DocumentTokens) -> str:
 
 
 def process_section(body: Element, tokens: DocumentTokens) -> str:
-
     """
     Processes individual sections, recursively goes throw sections tree
     """
@@ -191,7 +187,6 @@ def process_section(body: Element, tokens: DocumentTokens) -> str:
 
 
 def children_to_html(root: Element) -> str:
-
     """
     Converts xml tag children to string
     """
@@ -205,7 +200,6 @@ def children_to_html(root: Element) -> str:
 
 
 def process_image(element: Element, tokens: DocumentTokens) -> None:
-
     r"""
     Converts fb2 \<image /\> to html \<img /\>. Replaces xlink:href with src="\<base64_image_data\>"
     """
@@ -236,7 +230,6 @@ tag_with_class = {
 
 
 def process_content(root: Element, tokens: DocumentTokens) -> None:
-
     """
     Converts fb2 xml tag names to html equivalents and my own styled elements.
     Resolves binary data dependencies

app/main.py

@@ -3,12 +3,17 @@
 from datetime import datetime
 
 from fastapi import FastAPI, File, HTTPException, UploadFile
+from fastapi.middleware.cors import CORSMiddleware
 from pydantic import BaseModel  # pylint: disable=no-name-in-module
 
 from .epub import epub2html
 from .fb2 import fb22html
 from .utils import HashedHTMLBook, add_hash
 
+origins = (
+    "*"
+)
+
 
 class DebugInfo(BaseModel):  # pylint: disable=too-few-public-methods
     """Main handler return types"""
@@ -18,6 +23,14 @@ class DebugInfo(BaseModel):  # pylint: disable=too-few-public-methods
 
 app = FastAPI()
 
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=origins,
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
 start_time = datetime.now()
 
 
@@ -47,7 +60,8 @@ async def create_upload_file(file: UploadFile = File(...)):
     elif file.filename.endswith(".epub"):
         content = await epub2html(file.file)
     else:
-        raise HTTPException(status_code=415, detail="Error! Unsupported file type")
+        raise HTTPException(
+            status_code=415, detail="Error! Unsupported file type")
 
     h_content = add_hash(content)
 

app/utils.py

@@ -17,7 +17,7 @@ class HTMLBook(BaseModel):  # pylint: disable=too-few-public-methods
 
     title: str
     author: str
-    cover: Optional[str]
+    cover: Optional[str] = None
     content: str
 
 

vercel.json

@@ -0,0 +1,5 @@
+{
+    "rewrites": [
+        { "source": "/(.*)", "destination": "/api/main"}
+    ]
+}