created uv project structure, added Docker integration, updated README.md with some general info

.gitignore

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+# Python-generated files
+__pycache__/
+*.py[oc]
+build/
+dist/
+wheels/
+*.egg-info
+
+# Virtual environments
+.venv

.python-version

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+3.12

Dockerfile

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+FROM python:3.12-slim-bookworm
+COPY --from=ghcr.io/astral-sh/uv:latest /uv /uvx /bin/ 
+ADD . /app
+WORKDIR /app
+RUN uv sync --frozen
+EXPOSE 8000
+CMD ["uv", "run", "fastapi", "dev", "main.py", "--host", "0.0.0.0"]

README.md

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+# autodiscover-proxy
+
+A simple proxy server used to expose domains associated with a given domain via Microsoft's AutoDiscover.svc.
+
+## Usage
+
+Running locally:
+```bash
+uv run fastapi dev main.py
+```
+
+Running in Docker:
+```bash
+docker run -p 8000:8000 -it git.wnd.sh/n/autodiscover-proxy
+# or
+docker build -t autodiscover-proxy .
+docker run -p 8000:8000 -it autodiscover-proxy
+```

main.py

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+from typing import Annotated
+from fastapi import FastAPI, Query
+from fastapi.responses import JSONResponse
+import xml.etree.ElementTree as xml
+import requests
+import json
+
+app = FastAPI()
+
+@app.get("/{domain}")
+def read_root(
+    domain: str,
+    platform: Annotated[
+        str | None,
+        Query(pattern="^default|gcc|gcc_high$")
+    ] = "default",
+):
+
+    match platform:
+        case "gcc_high": base_uri = "autodiscover-s.office365.us"
+        case "gcc": base_uri = "autodiscover-s-dod.office365.us"
+        case "default": base_uri = "autodiscover-s.outlook.com"
+
+    headers = { "Content-Type": "text/xml; charset=utf-8", "SOAPAction": "http://schemas.microsoft.com/exchange/2010/Autodiscover/Autodiscover/GetFederationInformation" }
+    uri = f"https://{base_uri}/autodiscover/autodiscover.svc"
+    data = f"""<?xml version="1.0" encoding="utf-8"?>
+    <soap:Envelope xmlns:exm="http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:ext="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:a="http://www.w3.org/2005/08/addressing" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
+        <soap:Header>
+            <a:Action soap:mustUnderstand="1">http://schemas.microsoft.com/exchange/2010/Autodiscover/Autodiscover/GetFederationInformation</a:Action>
+            <a:To soap:mustUnderstand="1">{uri}</a:To>
+            <a:ReplyTo><a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address></a:ReplyTo>
+        </soap:Header>
+        <soap:Body>
+            <GetFederationInformationRequestMessage xmlns="http://schemas.microsoft.com/exchange/2010/Autodiscover">
+                <Request>
+                    <Domain>{domain}</Domain>
+                </Request>
+            </GetFederationInformationRequestMessage>
+        </soap:Body>
+    </soap:Envelope>
+    """
+
+    response = requests.post(uri, data=data, headers=headers)
+    if (not response.ok): return { "error": f"Error contacting autodiscover service for {domain}" }
+
+    root = xml.fromstring(response.text)
+    content = [i.text for i in root[1][0][0][3]] # root/body/GetFederationInformationResponseMessage/Domains
+
+    return JSONResponse(content=content, headers={"Cache-Control": "max-age=604800, public"})
+

pyproject.toml

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+[project]
+name = "autodiscover-proxy"
+version = "0.1.0"
+description = "A simple proxy server used to expose domains associated with a given domain via Microsoft's AutoDiscover.svc."
+readme = "README.md"
+requires-python = ">=3.12"
+dependencies = ['fastapi[standard]', 'requests']

uv.lock

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+version = 1
+requires-python = ">=3.12"
+
+[[package]]
+name = "autodiscover-proxy"
+version = "0.1.0"
+source = { virtual = "." }