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mishig HF Staff commited on
Commit
afb907c
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1 Parent(s): e7ef588

Initial: proxy Space that injects api-instructions meta tag

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Files changed (3) hide show
  1. Dockerfile +6 -0
  2. app.py +77 -0
  3. requirements.txt +3 -0
Dockerfile ADDED
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+ FROM python:3.11-slim
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+ WORKDIR /app
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+ COPY requirements.txt .
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+ RUN pip install --no-cache-dir -r requirements.txt
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+ COPY app.py .
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+ CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]
app.py ADDED
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+ import os
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+ import httpx
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+ from fastapi import FastAPI, Request
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+ from fastapi.responses import HTMLResponse
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+
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+ app = FastAPI()
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+
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+ HF_TOKEN = os.environ.get("HF_TOKEN", "")
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+
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+
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+ def build_agent_prompt(space_info: dict) -> str:
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+ space_id = space_info.get("id", "")
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+ subdomain = space_info.get("subdomain", "")
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+ description = space_info.get("ai_short_description") or (space_info.get("cardData") or {}).get("short_description")
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+ base_url = f"https://{subdomain}.hf.space"
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+
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+ prefix = f"To use this application ({space_id}: {description}) — " if description else ""
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+ return (
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+ f'{prefix}API schema: GET {base_url}/gradio_api/info — '
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+ f'Call endpoint: POST {base_url}/gradio_api/call/{{endpoint}} {{"data": [...]}} — '
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+ f'Poll result: GET {base_url}/gradio_api/call/{{endpoint}}/{{event_id}} — '
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+ f'auth: Bearer $HF_TOKEN'
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+ )
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+
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+
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+ @app.get("/proxy/{namespace}/{repo}", response_class=HTMLResponse)
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+ async def proxy_space(namespace: str, repo: str, request: Request):
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+ space_id = f"{namespace}/{repo}"
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+ headers = {}
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+ if HF_TOKEN:
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+ headers["Authorization"] = f"Bearer {HF_TOKEN}"
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+
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+ async with httpx.AsyncClient(follow_redirects=True) as client:
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+ # Fetch space info from API
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+ api_resp = await client.get(f"https://huggingface.co/api/spaces/{space_id}", headers=headers)
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+ if api_resp.status_code != 200:
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+ return HTMLResponse(f"<html><body>Space not found: {space_id}</body></html>", status_code=404)
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+
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+ space_info = api_resp.json()
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+
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+ if space_info.get("sdk") != "gradio":
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+ return HTMLResponse(f"<html><body>Only Gradio spaces are supported. This space uses: {space_info.get('sdk')}</body></html>", status_code=400)
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+
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+ # Fetch the actual space page HTML
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+ page_resp = await client.get(f"https://huggingface.co/spaces/{space_id}", headers=headers)
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+ html = page_resp.text
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+
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+ # Build the meta tag
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+ prompt = build_agent_prompt(space_info)
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+ meta_tag = f'<meta name="api-instructions" content="{prompt}">'
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+
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+ # Inject meta tag after <head> or at the start
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+ if "<head>" in html:
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+ html = html.replace("<head>", f"<head>\n{meta_tag}", 1)
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+ elif "<HEAD>" in html:
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+ html = html.replace("<HEAD>", f"<HEAD>\n{meta_tag}", 1)
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+ else:
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+ html = f"{meta_tag}\n{html}"
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+
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+ return HTMLResponse(html)
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+
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+
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+ @app.get("/", response_class=HTMLResponse)
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+ async def home():
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+ return HTMLResponse("""
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+ <html>
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+ <head><title>Agent Meta Tag Proxy</title></head>
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+ <body style="font-family: sans-serif; max-width: 600px; margin: 40px auto; padding: 0 20px;">
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+ <h1>Agent Meta Tag Proxy</h1>
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+ <p>This Space injects a <code>&lt;meta name="api-instructions"&gt;</code> tag into Gradio Space pages for AI agent discovery.</p>
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+ <h3>Usage</h3>
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+ <pre>/proxy/{namespace}/{repo}</pre>
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+ <h3>Example</h3>
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+ <a href="/proxy/mrfakename/Z-Image-Turbo">/proxy/mrfakename/Z-Image-Turbo</a>
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+ </body>
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+ </html>
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+ """)
requirements.txt ADDED
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+ fastapi
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+ uvicorn
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+ httpx