feat: add IP geolocation tracking and include location in prompts

- Add GeoLite2-City.mmdb database for IP lookup
- Create geoip.py module for IP location services
- Extract client IP from requests and log location info
- Pass location context to LLM prompts for enhanced responses

backend/geoip.py

@@ -0,0 +1,56 @@
+import os
+import logging
+from typing import Optional
+
+logger = logging.getLogger("api")
+
+_geoip_reader = None
+
+
+def _get_reader():
+    global _geoip_reader
+    if _geoip_reader is not None:
+        return _geoip_reader
+    try:
+        import geoip2.database
+        db_path = os.path.join(os.path.dirname(__file__), "GeoLite2-City.mmdb")
+        if os.path.exists(db_path):
+            _geoip_reader = geoip2.database.Reader(db_path)
+            logger.info("GeoIP database loaded: %s", db_path)
+            return _geoip_reader
+        else:
+            logger.warning("GeoIP database not found: %s", db_path)
+    except ImportError:
+        logger.warning("geoip2 not installed, IP location disabled")
+    except Exception as e:
+        logger.warning("Failed to load GeoIP database: %s", e)
+    return None
+
+
+def get_ip_location(ip: str) -> Optional[dict]:
+    if not ip or ip in ("127.0.0.1", "localhost", "::1"):
+        return None
+    reader = _get_reader()
+    if not reader:
+        return None
+    try:
+        response = reader.city(ip)
+        country = response.country.name
+        region = response.subdivisions.most_specific.name if response.subdivisions else None
+        city = response.city.name
+        parts = [p for p in [country, region, city] if p]
+        if not parts:
+            return None
+        return {
+            "country": country,
+            "region": region,
+            "city": city,
+            "display": " ".join(parts)
+        }
+    except Exception:
+        return None
+
+
+def get_ip_location_text(ip: str) -> str:
+    loc = get_ip_location(ip)
+    return loc["display"] if loc else ""

backend/main.py

@@ -1,4 +1,4 @@
-from fastapi import FastAPI
+from fastapi import FastAPI, Request
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.responses import StreamingResponse, JSONResponse
 from pydantic import BaseModel
@@ -9,6 +9,7 @@ import logging
 
 from prompt import build_prompt, prepare_prompt_context
 from llm import call_ollama, call_vlm_ocr
+from geoip import get_ip_location_text
 
 logging.basicConfig(
     level=logging.INFO,
@@ -43,23 +44,32 @@ def _preview(text: str, limit: int = 80) -> str:
         return value
     return value[:limit] + "..."
 
+def get_client_ip(request: Request) -> str:
+    return request.headers.get("X-Client-IP") or request.client.host if request.client else "unknown"
+
 @app.post("/v1/completions")
-async def create_completion(request: CompletionRequest):
+async def create_completion(request: Request, req: CompletionRequest):
     request_id = str(uuid.uuid4())[:8]
+    client_ip = get_client_ip(request)
+    # 查询 IP 归属地
+    location = get_ip_location_text(client_ip)
+    if location:
+        logger.info("[%s] client_location=%s", request_id, location)
     try:
         logger.info(
-            "[%s] /v1/completions prefix_chars=%d suffix_chars=%d lang=%s prefix_tail='%s' suffix_head='%s'",
+            "[%s] /v1/completions client_ip=%s prefix_chars=%d suffix_chars=%d lang=%s prefix_tail='%s' suffix_head='%s'",
             request_id,
-            len(request.prefix or ""),
+            client_ip,
-            len(request.suffix or ""),
+            len(req.prefix or ""),
-            request.languageId,
+            len(req.suffix or ""),
-            _preview((request.prefix or "")[-120:]),
+            req.languageId,
-            _preview((request.suffix or "")[:120]),
+            _preview((req.prefix or "")[-120:]),
+            _preview((req.suffix or "")[:120]),
         )
-        llm_prefix, llm_suffix = prepare_prompt_context(request.prefix or "", request.suffix or "")
+        llm_prefix, llm_suffix = prepare_prompt_context(req.prefix or "", req.suffix or "")
         logger.info("[%s] llm_input_prefix=%r", request_id, llm_prefix)
         logger.info("[%s] llm_input_suffix=%r", request_id, llm_suffix)
-        prompt = build_prompt(request.prefix, request.suffix, request.languageId)
+        prompt = build_prompt(req.prefix, req.suffix, req.languageId, location=location)
         result = await call_ollama(prompt, tag=f"{request_id}-primary", temperature=0.7)
 
         content = result["content"] or ""

backend/prompt.py

@@ -29,12 +29,13 @@ def prepare_prompt_context(prefix: str, suffix: str) -> Tuple[str, str]:
     return _prepare_context(prefix, suffix)
 
 
-def build_prompt(prefix: str, suffix: str, language_id: str = "markdown") -> str:
+def build_prompt(prefix: str, suffix: str, language_id: str = "markdown", location: str = "") -> str:
     safe_language_id = _sanitize_language_id(language_id)
     recent_prefix, recent_suffix = _prepare_context(prefix, suffix)
     current_time = _get_current_datetime()
+    location_info = f"\nUser location: {location}" if location else ""
 
-    prompt = f"""Current time: {current_time}
+    prompt = f"""Current time: {current_time}{location_info}
 
 You are an inline completion engine for a {safe_language_id} editor with ghost-text suggestions.
 

backend/requirements.txt

@@ -4,3 +4,4 @@ ollama
 pydantic
 python-dotenv
 httpx
+geoip2

backend/test_geoip.py

@@ -0,0 +1,80 @@
+"""
+GeoIP2 IP归属地查询测试脚本
+
+使用方法：
+1. 安装依赖：pip install geoip2
+2. 下载数据库：https://dev.maxmind.com/geoip/geoip2/geolite2/
+3. 运行测试：python test_geoip.py
+"""
+
+import os
+import sys
+
+try:
+    import geoip2.database
+except ImportError:
+    print("请先安装 geoip2: pip install geoip2")
+    sys.exit(1)
+
+DB_PATH = os.path.join(os.path.dirname(__file__), "GeoLite2-City.mmdb")
+
+TEST_IPS = [
+    "8.8.8.8",           # Google DNS (美国)
+    "114.114.114.114",   # 114 DNS (中国南京)
+    "223.5.5.5",         # 阿里DNS (中国杭州)
+    "1.1.1.1",           # Cloudflare DNS (澳大利亚)
+    "119.29.29.29",      # 腾讯DNS (中国)
+]
+
+
+def get_location(reader, ip: str) -> dict:
+    try:
+        response = reader.city(ip)
+        return {
+            "ip": ip,
+            "country": response.country.name,
+            "country_code": response.country.iso_code,
+            "region": response.subdivisions.most_specific.name if response.subdivisions else None,
+            "city": response.city.name,
+            "latitude": response.location.latitude,
+            "longitude": response.location.longitude,
+            "timezone": response.location.time_zone,
+        }
+    except geoip2.errors.AddressNotFoundError:
+        return {"ip": ip, "error": "IP未在数据库中找到"}
+    except Exception as e:
+        return {"ip": ip, "error": str(e)}
+
+
+def main():
+    if not os.path.exists(DB_PATH):
+        print(f"数据库文件不存在: {DB_PATH}")
+        print("请从 https://dev.maxmind.com/geoip/geoip2/geolite2/ 下载 GeoLite2-City.mmdb")
+        return
+    
+    print(f"加载数据库: {DB_PATH}")
+    reader = geoip2.database.Reader(DB_PATH)
+    
+    print("\n" + "=" * 60)
+    print("IP归属地查询测试")
+    print("=" * 60)
+    
+    for ip in TEST_IPS:
+        result = get_location(reader, ip)
+        if "error" in result:
+            print(f"\n{ip}: {result['error']}")
+        else:
+            print(f"\n{ip}:")
+            print(f"  国家: {result['country']} ({result['country_code']})")
+            print(f"  地区: {result['region'] or '未知'}")
+            print(f"  城市: {result['city'] or '未知'}")
+            print(f"  坐标: {result['latitude']}, {result['longitude']}")
+            print(f"  时区: {result['timezone']}")
+    
+    reader.close()
+    print("\n" + "=" * 60)
+    print("测试完成")
+
+
+if __name__ == "__main__":
+    main()

src/utils/api.js

@@ -1,10 +1,30 @@
 import { API_URL } from './config.js'
 
+let cachedIP = null
+
+async function getClientIP() {
+    if (cachedIP) return cachedIP
+    try {
+        const controller = new AbortController()
+        setTimeout(() => controller.abort(), 3000)
+        const res = await fetch('https://api.ipify.org?format=json', { signal: controller.signal })
+        const data = await res.json()
+        cachedIP = data.ip
+        return cachedIP
+    } catch {
+        return null
+    }
+}
+
 export async function fetchSuggestion(prefix, suffix, signal, apiUrl = API_URL) {
     try {
+        const clientIP = await getClientIP()
+        const headers = { 'Content-Type': 'application/json' }
+        if (clientIP) headers['X-Client-IP'] = clientIP
+        
         const res = await fetch(apiUrl, {
             method: 'POST',
-            headers: { 'Content-Type': 'application/json' },
+            headers,
             body: JSON.stringify({ prefix, suffix, languageId: 'markdown' }),
             signal
         })