app.py

#!/usr/bin/env python
"""Structured Data Extractor — paste messy text (an email, receipt, job post…) and get

clean, schema-valid JSON. Uses Claude's forced tool-use so the output always matches the

schema (Ollama fallback uses constrained JSON decoding).



  pip install flask requests anthropic

  python app.py            # http://127.0.0.1:8500



Project #4 of the "30 Projects in 15 Days" challenge — GritAI.

"""
import os, json
from flask import Flask, request, Response, jsonify

PORT = int(os.environ.get("PORT", "8500"))
ANTHROPIC_KEY = os.environ.get("ANTHROPIC_API_KEY")
ANTHROPIC_MODEL = os.environ.get("ANTHROPIC_MODEL", "claude-sonnet-5")
OLLAMA_URL = os.environ.get("OLLAMA_URL", "http://127.0.0.1:11434")
OLLAMA_MODEL = os.environ.get("OLLAMA_MODEL", "qwen2.5:7b")

S = lambda: {"type": ["string", "null"]}
N = lambda: {"type": ["number", "null"]}

SCHEMAS = {
    "contact": {"label": "Contact", "emoji": "👤", "schema": {"type": "object", "properties": {
        "name": S(), "title": S(), "company": S(), "email": S(), "phone": S(),
        "website": S(), "address": S()}, "required": ["name"]}},
    "invoice": {"label": "Invoice / Receipt", "emoji": "🧾", "schema": {"type": "object", "properties": {
        "vendor": S(), "date": S(), "currency": S(), "subtotal": N(), "tax": N(), "total": N(),
        "line_items": {"type": "array", "items": {"type": "object", "properties": {
            "description": {"type": "string"}, "qty": N(), "unit_price": N(), "amount": N()}}}},
        "required": ["vendor", "total"]}},
    "event": {"label": "Event", "emoji": "📅", "schema": {"type": "object", "properties": {
        "title": S(), "date": S(), "start_time": S(), "end_time": S(), "location": S(),
        "organizer": S(), "description": S()}, "required": ["title"]}},
    "job": {"label": "Job posting", "emoji": "💼", "schema": {"type": "object", "properties": {
        "title": S(), "company": S(), "location": S(), "employment_type": S(), "salary_range": S(),
        "responsibilities": {"type": "array", "items": {"type": "string"}},
        "requirements": {"type": "array", "items": {"type": "string"}},
        "apply_url": S()}, "required": ["title"]}},
}

SAMPLES = {
    "contact": ("👤", "Email signature",
        "thanks again! — Maya\n\nMaya R. Fitzgerald\nSr. Solutions Architect, Northwind Cloud\nmaya.fitzgerald@northwind.example  |  cell (415) 555-0182\n1200 Harbor Blvd, Suite 400, San Diego CA 92101\nnorthwindcloud.example"),
    "invoice": ("🧾", "Receipt",
        "RIVERSIDE HARDWARE\nInvoice #4821 — Mar 14, 2026\n\n2x Cordless drill @ $89.99 = $179.98\n1x Drill bit set @ $24.50 = $24.50\n3x Work gloves @ $12.00 = $36.00\n\nSubtotal: $240.48\nTax (8.25%): $19.84\nTOTAL: $260.32\nPaid: Visa ****4417"),
    "job": ("💼", "Job posting",
        "We're hiring a Senior Backend Engineer (Remote, US) at Lumina Labs. Comp: $150k-$185k + equity. You'll design and scale our API platform, own service reliability, and mentor two junior engineers. Must have: 5+ yrs backend, strong Python or Go, experience with distributed systems and Postgres. Nice to have: Kafka, k8s. Apply at lumina.example/careers/be-senior"),
}

def build_schema(key, custom_fields):
    if key in SCHEMAS:
        return SCHEMAS[key]["schema"]
    if key == "custom":
        props = {f.strip(): S() for f in (custom_fields or "").split(",") if f.strip()}
        return {"type": "object", "properties": props}
    return SCHEMAS["contact"]["schema"]

def extract(text, schema):
    prompt = ("Extract structured data from the text below into the required schema. "
              "Use null for anything not present — never invent values.\n\nTEXT:\n" + text[:12000])
    if ANTHROPIC_KEY:
        import anthropic
        client = anthropic.Anthropic(api_key=ANTHROPIC_KEY)
        r = client.messages.create(model=ANTHROPIC_MODEL, max_tokens=1500,
            tools=[{"name": "extract", "description": "Return the structured data from the text.",
                    "input_schema": schema}],
            tool_choice={"type": "tool", "name": "extract"},
            messages=[{"role": "user", "content": prompt}])
        for b in r.content:
            if b.type == "tool_use":
                return b.input
        return {}
    import requests
    r = requests.post(f"{OLLAMA_URL}/api/chat", timeout=90, json={
        "model": OLLAMA_MODEL, "stream": False, "format": schema,
        "messages": [{"role": "user", "content": prompt}], "options": {"temperature": 0}})
    r.raise_for_status()
    return json.loads(r.json()["message"]["content"])

app = Flask(__name__)

@app.route("/")
def home():
    return Response(PAGE, mimetype="text/html")

@app.route("/api/extract", methods=["POST"])
def api_extract():
    b = request.get_json(force=True)
    text = (b.get("text") or "").strip()
    key = b.get("schema", "contact")
    fields = b.get("fields", "")
    if not text:
        return jsonify(error="Paste some text to extract from."), 400
    schema = build_schema(key, fields)
    if not schema.get("properties"):
        return jsonify(error="No fields to extract — add some custom fields (comma-separated)."), 400
    try:
        return jsonify(data=extract(text, schema))
    except Exception as e:
        import sys; print("extract error:", type(e).__name__, file=sys.stderr, flush=True)
        return jsonify(error="Extraction failed — please try again."), 200

PAGE = """<!doctype html><html lang="en"><head><meta charset="utf-8">

<title>Data Extractor — GritAI</title>

<meta name="viewport" content="width=device-width,initial-scale=1">

<link rel="preconnect" href="https://fonts.googleapis.com">

<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>

<link href="https://fonts.googleapis.com/css2?family=Archivo:wght@600;700;800;900&family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:wght@400;500;600&display=swap" rel="stylesheet">

<style>

/* ============================================================================

   GRITAI DESIGN SYSTEM — "Engineered / Industrial"

   Dark · grit-orange · Archivo + IBM Plex · blueprint grid + grain.

   Canonical source of truth for every GritAI app (30-in-15 #1-30) + the hub.

   Rob-approved 2026-09-05 (#9 pilot: design-critic 5.71 -> 7.57).



   HOW TO USE: embed this <style> verbatim in an app's page, add the Google Fonts

   <link> below, then build the body from the component classes here. Keep the

   header (monogram + app name + tags), grit-orange as the ONLY accent, dark bg.



   FONTS (add to <head>):

   <link rel="preconnect" href="https://fonts.googleapis.com">

   <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>

   <link href="https://fonts.googleapis.com/css2?family=Archivo:wght@600;700;800;900&family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:wght@400;500;600&display=swap" rel="stylesheet">

   ============================================================================ */

:root{

 --bg:#0a0b0e; --bg2:#0e1015; --panel:#111318; --panel2:#15181f;

 --ink:#eef0f4; --dim:#9aa1b0; --dim2:#5f6675; --line:#20242e; --line2:#2b303c;

 --grit:#ff5a2a; --grit2:#ff7d54; --grit-dim:#c9451f; --ok:#5fd08a; --bad:#ff6b6b;

 --disp:'Archivo',system-ui,sans-serif; --body:'IBM Plex Sans',system-ui,sans-serif;

 --mono:'IBM Plex Mono',ui-monospace,monospace;

}

*{box-sizing:border-box}

html,body{height:100%}

body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:15px;line-height:1.6;

 -webkit-font-smoothing:antialiased;position:relative;overflow-x:hidden}

/* blueprint grid + vignette */

body::before{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;

 background:linear-gradient(0deg,transparent 95%,rgba(255,90,42,.04) 100%),

  repeating-linear-gradient(90deg,transparent 0 63px,rgba(255,255,255,.018) 63px 64px),

  repeating-linear-gradient(0deg,transparent 0 63px,rgba(255,255,255,.018) 63px 64px),

  radial-gradient(120% 80% at 50% -10%,#141821 0%,var(--bg) 55%)}

/* film grain */

body::after{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.05;mix-blend-mode:overlay;

 background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}

.wrap{position:relative;z-index:1;max-width:960px;margin:0 auto;padding:0 28px 70px}



/* ---- header band (monogram SVG + wordmark + tags) ---- */

header{display:flex;align-items:center;gap:16px;padding:22px 0 18px;border-bottom:1px solid var(--line);animation:fade .6s .02s both}

.mark{width:38px;height:38px;flex:none}.mark svg{display:block}

.brand{display:flex;flex-direction:column;line-height:1}

.brand .co{font-family:var(--disp);font-weight:900;font-size:19px;letter-spacing:.5px}.brand .co b{color:var(--grit)}

.brand .sub{font-family:var(--mono);font-size:10.5px;letter-spacing:.28em;text-transform:uppercase;color:var(--dim2);margin-top:5px}

.tags{margin-left:auto;display:flex;gap:8px}

.tag{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--dim);border:1px solid var(--line2);border-radius:2px;padding:5px 9px}

.tag.hot{color:var(--grit);border-color:var(--grit-dim)}

/* canonical monogram SVG (paste in .mark):

 <svg width="38" height="38" viewBox="0 0 38 38" fill="none"><rect x="1" y="1" width="36" height="36" rx="2" stroke="#2b303c"/><path d="M27 12.5A9 9 0 1 0 28 22H19" stroke="#ff5a2a" stroke-width="2.4" stroke-linecap="square"/><rect x="10.5" y="10.5" width="3" height="3" fill="#ff5a2a"/></svg> */



/* ---- hero ---- */

.hero{padding:34px 0 26px;animation:fade .6s .12s both}

.hero h1{font-family:var(--disp);font-weight:800;font-size:clamp(30px,5.4vw,52px);line-height:1.02;letter-spacing:-.02em;margin:0;max-width:16ch}

.hero h1 em{font-style:normal;color:var(--grit)}

.hero p{color:var(--dim);max-width:56ch;margin:16px 0 0;font-size:15.5px}



/* ---- section label (01 · NAME + rule) ---- */

.sec{display:flex;align-items:center;gap:14px;margin:30px 0 14px}

.sec .num{font-family:var(--mono);font-size:11px;font-weight:600;color:var(--grit);letter-spacing:.1em}

.sec .name{font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.26em;text-transform:uppercase;color:var(--dim)}

.sec .rule{flex:1;height:1px;background:linear-gradient(90deg,var(--line2),transparent)}



/* ---- panels ---- */

.panel{border:1px solid var(--line);border-radius:3px;background:linear-gradient(180deg,var(--panel),var(--bg2))}

.card{border:1px solid var(--line2);border-radius:3px;background:var(--panel);padding:18px 20px}

.card.accent{border-left:2px solid var(--grit)}



/* ---- input field (terminal) ---- */

.field{display:flex;align-items:stretch;border:1px solid var(--line2);border-radius:3px;background:var(--panel);overflow:hidden;transition:border-color .18s}

.field:focus-within{border-color:var(--grit-dim)}

.field .car{font-family:var(--mono);color:var(--grit);padding:16px 0 16px 16px;font-size:15px;user-select:none}

.field input,.field textarea{flex:1;background:transparent;border:0;outline:none;color:var(--ink);font-family:var(--body);font-size:15.5px;padding:16px 14px;resize:vertical}

.field input::placeholder,.field textarea::placeholder{color:var(--dim2)}

textarea.ta{width:100%;min-height:140px;border:1px solid var(--line2);border-radius:3px;background:var(--panel);color:var(--ink);font-family:var(--body);font-size:15px;padding:14px 16px;outline:none;resize:vertical}

textarea.ta:focus{border-color:var(--grit-dim)}



/* ---- buttons ---- */

.run{border:0;background:var(--grit);color:#140a06;font-family:var(--mono);font-weight:600;font-size:13px;letter-spacing:.14em;text-transform:uppercase;padding:0 24px;cursor:pointer;transition:.16s;box-shadow:-1px 0 0 var(--grit-dim)}

.run:hover{background:var(--grit2);box-shadow:0 0 26px -4px rgba(255,90,42,.55)}

.run:disabled{opacity:.55;cursor:default;box-shadow:none}

.btn{display:inline-flex;align-items:center;gap:8px;border:0;border-radius:3px;background:var(--grit);color:#140a06;font-family:var(--mono);font-weight:600;font-size:13px;letter-spacing:.1em;text-transform:uppercase;padding:12px 22px;cursor:pointer;transition:.16s}

.btn:hover{background:var(--grit2);box-shadow:0 0 26px -4px rgba(255,90,42,.55)}

.btn.ghost{background:transparent;color:var(--dim);border:1px solid var(--line2)}

.btn.ghost:hover{color:var(--grit);border-color:var(--grit-dim);background:transparent;box-shadow:none}



/* ---- chips / controls ---- */

.chip{font-family:var(--mono);font-size:12px;color:var(--dim);background:var(--panel);border:1px solid var(--line);border-radius:2px;padding:8px 11px;cursor:pointer;transition:.15s}

.chip:hover{color:var(--grit);border-color:var(--grit-dim)}

.chip .pt{color:var(--dim2);margin-right:7px}

select,.select{padding:10px 12px;border:1px solid var(--line2);border-radius:3px;background:var(--panel);color:var(--ink);font-family:var(--mono);font-size:13px;outline:none;cursor:pointer}

select:focus{border-color:var(--grit-dim)}

label.lbl{font-family:var(--mono);font-size:11px;text-transform:uppercase;letter-spacing:.24em;color:var(--dim2);display:block;margin-bottom:6px}



/* ---- mono log / trace rows ---- */

.log{font-family:var(--mono);font-size:13px;line-height:1.75}

.row{display:grid;grid-template-columns:22px auto 1fr;gap:0 12px;padding:13px 18px;border-bottom:1px solid var(--line)}

.row:last-child{border-bottom:0}

.row .mk{color:var(--grit);font-weight:600}

.row .tn{color:var(--grit2);text-transform:uppercase;letter-spacing:.06em;font-weight:500}

.row .rd{color:var(--ink);word-break:break-word}.row .rd .arg{color:var(--dim2)}



/* ---- tables ---- */

table{width:100%;border-collapse:collapse;font-size:13.5px}

th{text-align:left;font-family:var(--mono);font-size:11px;text-transform:uppercase;letter-spacing:.12em;color:var(--dim2);font-weight:500;padding:11px 14px;border-bottom:1px solid var(--line2);background:var(--bg2)}

td{padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top}

tr:last-child td{border-bottom:0}

.tablewrap{border:1px solid var(--line);border-radius:3px;overflow:hidden;overflow-x:auto}



/* ---- chat bubbles ---- */

.msg{max-width:78%;padding:12px 15px;border-radius:3px;font-size:15px;line-height:1.55;margin-bottom:12px}

.msg.user{margin-left:auto;background:var(--panel2);border:1px solid var(--line2)}

.msg.bot{background:var(--panel);border:1px solid var(--line);border-left:2px solid var(--grit)}



/* ---- badges / pills ---- */

.badge{display:inline-block;font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.06em;padding:3px 9px;border-radius:2px;border:1px solid var(--line2);color:var(--dim)}

.badge.on{color:var(--grit);border-color:var(--grit-dim)}

.hl{color:var(--grit);font-weight:600;font-family:var(--mono)}



/* ---- answer/output prose ---- */

.prose{font-size:16px;line-height:1.65}.prose p{margin:0 0 12px}.prose p:last-child{margin-bottom:0}.prose b{color:var(--ink)}



/* ---- spinner ---- */

.spin{display:inline-flex;gap:6px;padding:16px 18px}.spin span{width:8px;height:8px;border-radius:50%;background:var(--grit);opacity:.5;animation:bd 1.2s infinite}

.spin span:nth-child(2){animation-delay:.18s}.spin span:nth-child(3){animation-delay:.36s}



/* ---- footer ---- */

footer{margin-top:34px;padding-top:16px;border-top:1px solid var(--line);font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--dim2);display:flex;gap:16px;flex-wrap:wrap;animation:fade .6s .5s both}

footer .b{color:var(--dim)}footer .sp{margin-left:auto}

footer a{color:var(--dim);text-decoration:none}footer a:hover{color:var(--grit)}



/* ---- reveal animations ---- */

@keyframes fade{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

@keyframes slidein{from{opacity:0;transform:translateX(-8px)}to{opacity:1;transform:none}}

@keyframes bd{0%,60%,100%{transform:translateY(0);opacity:.35}30%{transform:translateY(-6px);opacity:1}}

.rvl{animation:fade .6s both}



/* ---- app #4 Data Extractor (app-specific, on grit-orange system) ---- */

.samples{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 2px;align-items:center}

.tryl{font-family:var(--mono);font-size:10.5px;letter-spacing:.24em;text-transform:uppercase;color:var(--dim2);margin-right:2px}

.samp{font-family:var(--mono);font-size:12px;color:var(--dim);background:var(--panel);border:1px solid var(--line);border-radius:2px;padding:8px 12px;cursor:pointer;transition:.15s}

.samp:hover{color:var(--grit);border-color:var(--grit-dim)}

.ctlrow{display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;margin-top:4px}

.seg{display:flex;flex-wrap:wrap;gap:8px}

.seg button{font-family:var(--mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--dim);background:var(--panel);border:1px solid var(--line2);border-radius:2px;padding:10px 14px;cursor:pointer;transition:.15s}

.seg button:hover{color:var(--grit);border-color:var(--grit-dim)}

.seg button.on{color:#140a06;background:var(--grit);border-color:var(--grit);font-weight:600}

.run{align-self:stretch;padding:13px 26px}

#customwrap{display:none;margin-top:14px}

#customwrap .lbl{margin-bottom:8px}

.out{display:none}.out.show{display:block}

#copy{margin-left:6px;padding:8px 16px;font-size:11px}

pre#json{margin:0;font-family:var(--mono);font-size:13px;line-height:1.7;color:var(--ink);background:transparent;padding:18px 20px;overflow:auto;white-space:pre;min-height:44px}

#json .key{color:var(--grit)}

#json .str{color:var(--ink)}

#json .num{color:var(--grit2)}

#json .bool{color:var(--grit2)}

#json .null{color:var(--dim2);font-style:italic}

</style></head>

<body><div class="wrap">

<header>

 <div class="mark"><svg width="38" height="38" viewBox="0 0 38 38" fill="none"><rect x="1" y="1" width="36" height="36" rx="2" stroke="#2b303c"/><path d="M27 12.5A9 9 0 1 0 28 22H19" stroke="#ff5a2a" stroke-width="2.4" stroke-linecap="square"/><rect x="10.5" y="10.5" width="3" height="3" fill="#ff5a2a"/></svg></div>

 <div class="brand"><span class="co">GRIT<b>AI</b></span><span class="sub">Data Extractor</span></div>

 <div class="tags"><span class="tag hot">▸ Live</span><span class="tag">SDVOSB</span><span class="tag">Lawton OK</span></div>

</header>

<div class="hero">

 <h1>Messy text in.<br><em>Schema-valid</em> JSON out.</h1>

 <p>Paste an email signature, a receipt, a job post, or an event invite — get back clean, structured JSON via forced tool-use. It never invents values.</p>

</div>

<div class="sec"><span class="num">01</span><span class="name">Source Text</span><span class="rule"></span></div>

<textarea id="src" class="ta" placeholder="Paste an email signature, a receipt, a job posting, an event invite…"></textarea>

<div class="samples" id="samples"></div>

<div class="sec"><span class="num">02</span><span class="name">Target Schema</span><span class="rule"></span></div>

<div class="ctlrow">

 <div class="seg" id="seg">

  <button data-v="contact" class="on">Contact</button>

  <button data-v="invoice">Invoice</button>

  <button data-v="event">Event</button>

  <button data-v="job">Job</button>

  <button data-v="custom">Custom</button>

 </div>

 <button class="run" id="go" onclick="run()">Extract →</button>

</div>

<div id="customwrap">

 <label class="lbl">Custom fields</label>

 <div class="field"><span class="car">$</span><input id="custom" placeholder="Comma-separated, e.g. name, budget, deadline, owner"></div>

</div>

<div class="out" id="out">

 <div class="sec"><span class="num">03</span><span class="name">Extracted JSON</span><span class="rule"></span><button class="btn ghost" id="copy" onclick="copyJson()" style="display:none">Copy</button></div>

 <div class="panel"><pre id="json"></pre></div>

</div>

<footer><span class="b">Schema-valid JSON via forced tool-use · never invents values</span><span class="sp">GRITAI SOLUTIONS · 30-in-15 №4</span></footer>

</div><script>

const SAMPLES=[["contact","","Email signature"],["invoice","","Receipt"],["job","","Job posting"]];

const $=id=>document.getElementById(id);

const src=$('src'),go=$('go'),out=$('out'),jsonEl=$('json'),copy=$('copy'),customwrap=$('customwrap'),custom=$('custom');

let schema="contact",busy=false,lastJson="";

$('samples').innerHTML='<span class="tryl">Try</span>'+

 SAMPLES.map(s=>`<span class="samp" onclick="loadSample('${s[0]}')">${s[2]}</span>`).join('');

$('seg').addEventListener('click',e=>{const b=e.target.closest('button');if(!b)return;

 schema=b.dataset.v;[...seg.children].forEach(x=>x.classList.toggle('on',x===b));

 customwrap.style.display=schema==='custom'?'block':'none';});

function esc(s){return String(s).replace(/[&<>]/g,c=>({'&':'&amp;','<':'&lt;','>':'&gt;'}[c]));}

function jhtml(v,ind){ind=ind||0;const pad='  '.repeat(ind),p2='  '.repeat(ind+1);

 if(v===null)return '<span class="null">null</span>';

 if(typeof v==='number')return '<span class="num">'+v+'</span>';

 if(typeof v==='boolean')return '<span class="bool">'+v+'</span>';

 if(typeof v==='string')return '<span class="str">"'+esc(v)+'"</span>';

 if(Array.isArray(v)){if(!v.length)return '[]';return '[\\n'+v.map(x=>p2+jhtml(x,ind+1)).join(',\\n')+'\\n'+pad+']';}

 const ks=Object.keys(v);if(!ks.length)return '{}';

 return '{\\n'+ks.map(k=>p2+'<span class="key">"'+esc(k)+'"</span>: '+jhtml(v[k],ind+1)).join(',\\n')+'\\n'+pad+'}';}

function copyJson(){navigator.clipboard.writeText(lastJson);copy.textContent='Copied!';setTimeout(()=>copy.textContent='Copy',1400);}

async function loadSample(name){

 const r=await fetch('/api/sample_text?name='+name);const d=await r.json();

 if(d.text){src.value=d.text;schema=name;[...seg.children].forEach(x=>x.classList.toggle('on',x.dataset.v===name));

  customwrap.style.display='none';run();}

}

async function run(){if(busy)return;const text=src.value.trim();if(!text){src.focus();return;}

 busy=true;go.disabled=true;go.textContent='Extracting…';out.classList.add('show');copy.style.display='none';

 jsonEl.innerHTML='<span class="spin"><span></span><span></span><span></span></span>';

 try{const r=await fetch('/api/extract',{method:'POST',headers:{'Content-Type':'application/json'},

   body:JSON.stringify({text,schema,fields:custom.value})});const d=await r.json();

  if(d.error){jsonEl.textContent=d.error;}

  else{lastJson=JSON.stringify(d.data,null,2);jsonEl.innerHTML=jhtml(d.data,0);copy.style.display='inline-block';}

 }catch(e){jsonEl.textContent='Something went wrong — please try again.';}

 busy=false;go.disabled=false;go.textContent='Extract →';}

</script></body></html>"""

@app.route("/api/sample_text")
def sample_text():
    name = request.args.get("name", "")
    if name in SAMPLES:
        return jsonify(text=SAMPLES[name][2])
    return jsonify(error="unknown"), 404

if __name__ == "__main__":
    backend = "Claude API" if ANTHROPIC_KEY else f"Ollama ({OLLAMA_MODEL} @ {OLLAMA_URL})"
    print(f"Structured Data Extractor on http://127.0.0.1:{PORT}  [backend: {backend}]", flush=True)
    app.run(host="0.0.0.0", port=PORT, threaded=True)