Posts tagged: fastapi

External Link stackoverflow.com [1] I went down the route of leveraging the json-enc extention in htmx [2], but later realized that this completely breaks browsers/users who do not wish to use javascript. While most of the web would feel quite broken with javascript disabled, I don’t want to contribute to that without good reason. Taking a second look into this issue, rather than using json-enc, and using as_form to get form data into a model keeps the nice DX fo everything being a pydantic model, but the site still works without js. with js htmx kicks in, you get a spa like experience by loading partials onto the page, and without, you just get a full page reload. the implementation # [3] copied from https://stackoverflow.com/questions/60127234/how-to-use-a-pydantic-model-with-form-data-in-fastapi import inspect from typing import Type from fastapi import Form from pydantic import BaseModel from pydantic.fields import ModelField def as_form(cls: Type[BaseModel]): new_parameters = [] for field_name, model_field in cls.__fields__.items(): model_field: ModelField # type: ignore new_parameters.append( inspect.Parameter( model_field.alias, inspect.Parameter.POSITION...

External Link htmx.org [1] json-enc extension converts url encoded form values into json encoded data, this is very useful for fastapi [2] to have the same interface for htmx [3] and curl type of interfaces. Note This post is a thought [4]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://htmx.org/extensions/json-enc/ [2]: /fastapi/ [3]: /htmx/ [4]: /thoughts/

Header Parameters - FastAPI FastAPI framework, high performance, easy to learn, fast to code, ready for production fastapi.tiangolo.com [1] Getting request headers in fastapi [2] has a pretty nice stetup, it allows you to get headers values as function arguments, I was able to use headers to detect if a request was made from htmx [3] or not. If the request was made from htmx, then we want a html [4] format, otherwise I’m probably hitting the api programatically from something like curl or python @post_router.post("/post/") async def post_post( request: Request, post: PostCreate, current_user: Annotated[User, Depends(try_get_current_active_user)], session: Session = Depends(get_session), is_hx_request: Annotated[str | None, Header()] = None, ) -> PostRead: "create a post" print('hx_request', hx_request) db_post = Post.from_orm(post) session.add(db_post) session.commit() session.refresh(db_post) if is_hx_request: return templates.TemplateResponse("post_item.html", {"request": request, "config": config, "post": db_post}) return db_post Note This post is a thought [5]. It’s a short note that I make about someone else’s content online #thoughts References: [1]:...

Templates - FastAPI FastAPI framework, high performance, easy to learn, fast to code, ready for production fastapi.tiangolo.com [1] A guide to add Jinja2Templates to fastapi [2]. Note This post is a thought [3]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://fastapi.tiangolo.com/advanced/templates/ [2]: /fastapi/ [3]: /thoughts/

External Link stackoverflow.com [1] I am trying to use htmx [2] on a new fastapi [3] site for my thoughts, and have been hitting this error. Mixed Content: The page at 'https://front.mydomain.com/#/clients/1' was loaded over HTTPS, but requested an insecure resource 'http://back.mydomain/jobs/?_end=25&_order=DESC&_sort=id&_start=0&client_id=1'. This request has been blocked; the content must be served over HTTPS. What is happening # [4] I have an htmx component that gets the current users name, but if they are not logged in the backend redirects to a login form. <div hx-get='/users/me' hx-trigger='load'> get me </div> But for some reason when the front end gets this redirect, it tries to do it through http, and flags it as insecure. The solution # [5] To solve this issue, the post directs to set the --forwarded-allow-ips to ‘*’ uvicorn thoughts.api.app:app --port 5000 --reload --log-level info --host 0.0.0.0 --workers 1 --forwarded-allow-ips '*' Note This post is a thought [6]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://stackoverflow.com/questions/63511413/fastapi-redirection-for-trailing-slash-returns-non-s...

Static Files - FastAPI FastAPI framework, high performance, easy to learn, fast to code, ready for production fastapi.tiangolo.com [1] Mounting static files in fastapi [2]. from fastapi import FastAPI from fastapi.staticfiles import StaticFiles app = FastAPI() app.mount("/static", StaticFiles(directory="static"), name="static") Note This post is a thought [3]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://fastapi.tiangolo.com/tutorial/static-files/ [2]: /fastapi/ [3]: /thoughts/

First-class session support in FastAPI · Issue #754 · fastapi/fastapi Is your feature request related to a problem All of the security schemas currently supported by FastAPI rely on some sort of "client-server synergy" , where, for instance, the client is expected to... GitHub · github.com [1] Here is a snippet provided by @tiangolo to store the users jwt inside of a session cookie in fatapi. This was written in feb 12, 2020 and admits that this is not a well documented part of fastapi [2]. It’s already in place. More or less like the rest of the security tools. And it’s compatible with the rest of the parts, integrated with OpenAPI (as possible), but probably most importantly, with dependencies. It’s just not properly documented yet. 😞 But still, it works 🚀 e.g. from fastapi import FastAPI, Form, HTTPException, Depends from fastapi.security import APIKeyCookie from starlette.responses import Response, HTMLResponse from starlette import status from jose import jwt app = FastAPI() cookie_sec = APIKeyCookie(name="session") secret_key = "someactualsecret" users = {"dmontagu": {"password": "secret1"}, "tiangolo": {"password": "secret2"}} def get_current_user(session: str...

Filter Data - WHERE - SQLModel SQLModel, SQL databases in Python, designed for simplicity, compatibility, and robustness. sqlmodel.tiangolo.com [1] When fetching pydantic models from the database with sqlmodel, and you cannot select your item by id, you probably need to use a where clause. This is the sqlmodel way of doing it. Here is a snippet of how I am using sqlmodel select and where to find a post by link in my thoughts database. @post_router.get("/link/") async def get_post_by_link( *, session: Session = Depends(get_session), link: str, ) -> PostRead: "get one post by link" link = urllib.parse.unquote(link) print(f'link: {link}') post = session.exec(select(Post).where(Post.link==link)).first() if not post: raise HTTPException(status_code=404, detail=f"Post not found for link: {link}") return post Note This post is a thought [2]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://sqlmodel.tiangolo.com/tutorial/where/#filter-rows-using-where-with-sqlmodel [2]: /thoughts/

URL Decoding query strings or form parameters in Python | URLDecoder URL Decode online. URLDecoder is a simple and easy to use online tool for decoding URL components. Get started by typing or pasting a URL encoded string in the input text area, the tool will automa... urldecoder.io [1] In order to turn url encoded links back into links that I would find in the database of my thoughts project I need to urldecode them when they hit the api. When anything hits the api it must urlencode the links in order for them to be sent correctly as data and not get parsed as part of the url. Here is a snippet of how I am using urlib.parse.unquote to un-encode encoded urls so that I can fetch posts from the database. @post_router.get("/link/") async def get_post_by_link( *, session: Session = Depends(get_session), link: str, ) -> PostRead: "get one post by link" link = urllib.parse.unquote(link) print(f'link: {link}') post = session.exec(select(Post).where(Post.link==link)).first() if not post: raise HTTPException(status_code=404, detail=f"Post not found for link: {link}") return post Note This post is a thought [2]. It’s a short note that I make about someone else’s content ...