|
| 1 | +import os |
| 2 | +from datetime import datetime |
| 3 | +from typing import List, Optional, Dict, Any |
| 4 | +from uuid import uuid4 |
| 5 | + |
| 6 | +from fastapi import FastAPI, HTTPException |
| 7 | +from fastapi.responses import FileResponse |
| 8 | +from fastapi.staticfiles import StaticFiles |
| 9 | +from pydantic import BaseModel, Field |
| 10 | + |
| 11 | +app = FastAPI( |
| 12 | + title="OPEA Globalization & Governance Service", |
| 13 | + description="Language-aware gateway for OPEA-based GenAI apps (Topic A)", |
| 14 | + version="0.1.0", |
| 15 | +) |
| 16 | + |
| 17 | +# ----------------------------- |
| 18 | +# 静态文件目录 & 看板页面 |
| 19 | +# ----------------------------- |
| 20 | + |
| 21 | +BASE_DIR = os.path.dirname(os.path.abspath(__file__)) |
| 22 | +STATIC_DIR = os.path.join(BASE_DIR, "static") |
| 23 | +os.makedirs(STATIC_DIR, exist_ok=True) |
| 24 | + |
| 25 | +# 挂载 /static,用于访问 dashboard 里的静态资源(如果后面要拆 css/js) |
| 26 | +app.mount("/static", StaticFiles(directory=STATIC_DIR), name="static") |
| 27 | + |
| 28 | + |
| 29 | +@app.get("/", include_in_schema=False) |
| 30 | +@app.get("/dashboard", include_in_schema=False) |
| 31 | +def dashboard_page(): |
| 32 | + """ |
| 33 | + 国际化运营看板页面 |
| 34 | + 访问 http://localhost:8080/ 或 /dashboard 即可 |
| 35 | + """ |
| 36 | + dashboard_path = os.path.join(STATIC_DIR, "dashboard.html") |
| 37 | + if not os.path.exists(dashboard_path): |
| 38 | + raise HTTPException(status_code=404, detail="dashboard.html not found") |
| 39 | + return FileResponse(dashboard_path) |
| 40 | + |
| 41 | + |
| 42 | +# ----------------------------- |
| 43 | +# 配置 & 内存事件日志 |
| 44 | +# ----------------------------- |
| 45 | + |
| 46 | + |
| 47 | +class RegionConfig(BaseModel): |
| 48 | + region_code: str # cn / eu / us 等 |
| 49 | + default_language: str # zh-CN / en-US / th-TH ... |
| 50 | + allowed_languages: List[str] |
| 51 | + blocked_keywords: List[str] # 简单敏感词示例 |
| 52 | + hallucination_notice: bool # 是否强制附带“内容可能有误差”提示 |
| 53 | + pii_strict: bool # 是否启用更严格的隐私限制 |
| 54 | + |
| 55 | + |
| 56 | +TENANT_CONFIGS: Dict[str, RegionConfig] = { |
| 57 | + "demo-tenant-cn": RegionConfig( |
| 58 | + region_code="cn", |
| 59 | + default_language="zh-CN", |
| 60 | + allowed_languages=["zh-CN", "en-US", "th-TH"], |
| 61 | + blocked_keywords=["政治敏感", "违法犯罪"], # 纯示例 |
| 62 | + hallucination_notice=True, |
| 63 | + pii_strict=True, |
| 64 | + ), |
| 65 | + "demo-tenant-eu": RegionConfig( |
| 66 | + region_code="eu", |
| 67 | + default_language="en-US", |
| 68 | + allowed_languages=["en-US", "de-DE", "fr-FR"], |
| 69 | + blocked_keywords=["hate speech", "terrorism"], |
| 70 | + hallucination_notice=True, |
| 71 | + pii_strict=True, |
| 72 | + ), |
| 73 | +} |
| 74 | + |
| 75 | +# 简单事件缓存,用于看板 |
| 76 | +EVENT_LOG: List[Dict[str, Any]] = [] |
| 77 | + |
| 78 | + |
| 79 | +# ----------------------------- |
| 80 | +# 模型定义 |
| 81 | +# ----------------------------- |
| 82 | + |
| 83 | + |
| 84 | +class PromptPreviewRequest(BaseModel): |
| 85 | + tenant_id: str = Field(..., description="租户 ID,例如 demo-tenant-cn") |
| 86 | + region: Optional[str] = Field(None, description="区域编码,可选,默认取租户配置") |
| 87 | + language: Optional[str] = Field(None, description="目标语言,不填则用租户默认语言") |
| 88 | + raw_prompt: str = Field(..., description="原始提示词(还没做国际化之前)") |
| 89 | + task_type: str = Field("chat", description="任务类型:chat / qa / summarization 等") |
| 90 | + |
| 91 | + |
| 92 | +class PromptPreviewResponse(BaseModel): |
| 93 | + rewritten_prompt: str |
| 94 | + target_language: str |
| 95 | + applied_policies: List[str] |
| 96 | + warnings: List[str] |
| 97 | + |
| 98 | + |
| 99 | +class PolicyEvaluationRequest(BaseModel): |
| 100 | + tenant_id: str |
| 101 | + region: Optional[str] = None |
| 102 | + language: Optional[str] = None |
| 103 | + content: str = Field(..., description="最终要发给大模型的内容(或用户问题)") |
| 104 | + |
| 105 | + |
| 106 | +class PolicyEvaluationResponse(BaseModel): |
| 107 | + allowed: bool |
| 108 | + reasons: List[str] |
| 109 | + matched_rules: List[str] |
| 110 | + |
| 111 | + |
| 112 | +class EventLogItem(BaseModel): |
| 113 | + id: str |
| 114 | + tenant_id: str |
| 115 | + region: str |
| 116 | + language: str |
| 117 | + event_type: str # prompt_preview / blocked / allowed ... |
| 118 | + created_at: datetime |
| 119 | + payload: Dict[str, Any] |
| 120 | + |
| 121 | + |
| 122 | +class EventIn(BaseModel): |
| 123 | + tenant_id: str |
| 124 | + region: str |
| 125 | + language: str |
| 126 | + event_type: str |
| 127 | + payload: Dict[str, Any] |
| 128 | + |
| 129 | + |
| 130 | +# ----------------------------- |
| 131 | +# 工具函数 |
| 132 | +# ----------------------------- |
| 133 | + |
| 134 | + |
| 135 | +def get_tenant_cfg(tenant_id: str) -> RegionConfig: |
| 136 | + cfg = TENANT_CONFIGS.get(tenant_id) |
| 137 | + if not cfg: |
| 138 | + raise HTTPException(status_code=404, detail=f"Unknown tenant_id: {tenant_id}") |
| 139 | + return cfg |
| 140 | + |
| 141 | + |
| 142 | +def detect_or_default_language(req_lang: Optional[str], cfg: RegionConfig) -> str: |
| 143 | + """ |
| 144 | + 1)如果请求里有 language 并且在允许列表里,直接用 |
| 145 | + 2)否则 fallback 到租户默认语言 |
| 146 | + 后面可以在这里接入自动语言检测 |
| 147 | + """ |
| 148 | + if req_lang and req_lang in cfg.allowed_languages: |
| 149 | + return req_lang |
| 150 | + return cfg.default_language |
| 151 | + |
| 152 | + |
| 153 | +def apply_governance_wrappers( |
| 154 | + prompt: str, |
| 155 | + target_language: str, |
| 156 | + cfg: RegionConfig, |
| 157 | +) -> (str, List[str], List[str]): |
| 158 | + """ |
| 159 | + 根据区域 / 语言,加一些统一前后缀、免责声明之类的包装 |
| 160 | + """ |
| 161 | + applied_policies: List[str] = [] |
| 162 | + warnings: List[str] = [] |
| 163 | + |
| 164 | + # 语言约束(要求模型用指定语言回答) |
| 165 | + if target_language.startswith("zh"): |
| 166 | + language_hint = "请使用简体中文回答用户问题。" |
| 167 | + elif target_language.startswith("en"): |
| 168 | + language_hint = "Please answer the user in English." |
| 169 | + elif target_language.startswith("th"): |
| 170 | + language_hint = "กรุณาตอบเป็นภาษาไทย" |
| 171 | + else: |
| 172 | + language_hint = f"Please answer in language: {target_language}." |
| 173 | + |
| 174 | + applied_policies.append("language_hint") |
| 175 | + |
| 176 | + # 幻觉风险提醒(对终端用户可见) |
| 177 | + if cfg.hallucination_notice: |
| 178 | + if target_language.startswith("zh"): |
| 179 | + warnings.append("本回答由大模型生成,可能存在不准确或过期信息,请结合实际业务进行判断。") |
| 180 | + elif target_language.startswith("en"): |
| 181 | + warnings.append( |
| 182 | + "This answer is generated by a large language model and may contain inaccuracies. " |
| 183 | + "Please verify before applying to production." |
| 184 | + ) |
| 185 | + else: |
| 186 | + warnings.append( |
| 187 | + "This answer is generated by an AI model and may be inaccurate. " |
| 188 | + "Please verify before using it in critical scenarios." |
| 189 | + ) |
| 190 | + applied_policies.append("hallucination_notice") |
| 191 | + |
| 192 | + # PII 强化(这里只打标,实际可以在这里接 OPEA guardrails) |
| 193 | + if cfg.pii_strict: |
| 194 | + applied_policies.append("pii_strict") |
| 195 | + |
| 196 | + rewritten = f"{language_hint}\n\n{prompt}" |
| 197 | + return rewritten, applied_policies, warnings |
| 198 | + |
| 199 | + |
| 200 | +def simple_blocked_keyword_check(content: str, cfg: RegionConfig) -> (bool, List[str], List[str]): |
| 201 | + """ |
| 202 | + 极简关键词命中逻辑,后续可以换成更复杂的策略或接入 OPEA guardrails |
| 203 | + """ |
| 204 | + matched = [] |
| 205 | + lower = content.lower() |
| 206 | + for kw in cfg.blocked_keywords: |
| 207 | + if kw and kw.lower() in lower: |
| 208 | + matched.append(kw) |
| 209 | + |
| 210 | + if matched: |
| 211 | + reasons = [f"命中敏感词: {', '.join(matched)}"] |
| 212 | + return False, reasons, matched |
| 213 | + return True, [], [] |
| 214 | + |
| 215 | + |
| 216 | +# ----------------------------- |
| 217 | +# API 定义 |
| 218 | +# ----------------------------- |
| 219 | + |
| 220 | + |
| 221 | +@app.get("/healthz") |
| 222 | +def healthz(): |
| 223 | + return {"status": "ok", "service": "globalization-governance", "version": "0.1.0"} |
| 224 | + |
| 225 | + |
| 226 | +@app.post("/v1/globalization/prompt/preview", response_model=PromptPreviewResponse) |
| 227 | +def preview_prompt(req: PromptPreviewRequest): |
| 228 | + cfg = get_tenant_cfg(req.tenant_id) |
| 229 | + target_lang = detect_or_default_language(req.language, cfg) |
| 230 | + |
| 231 | + rewritten, policies, warnings = apply_governance_wrappers( |
| 232 | + prompt=req.raw_prompt, |
| 233 | + target_language=target_lang, |
| 234 | + cfg=cfg, |
| 235 | + ) |
| 236 | + |
| 237 | + EVENT_LOG.append( |
| 238 | + EventLogItem( |
| 239 | + id=str(uuid4()), |
| 240 | + tenant_id=req.tenant_id, |
| 241 | + region=req.region or cfg.region_code, |
| 242 | + language=target_lang, |
| 243 | + event_type="prompt_preview", |
| 244 | + created_at=datetime.utcnow(), |
| 245 | + payload={"task_type": req.task_type}, |
| 246 | + ).model_dump() |
| 247 | + ) |
| 248 | + |
| 249 | + return PromptPreviewResponse( |
| 250 | + rewritten_prompt=rewritten, |
| 251 | + target_language=target_lang, |
| 252 | + applied_policies=policies, |
| 253 | + warnings=warnings, |
| 254 | + ) |
| 255 | + |
| 256 | + |
| 257 | +@app.post("/v1/globalization/policy/evaluate", response_model=PolicyEvaluationResponse) |
| 258 | +def evaluate_policy(req: PolicyEvaluationRequest): |
| 259 | + cfg = get_tenant_cfg(req.tenant_id) |
| 260 | + lang = detect_or_default_language(req.language, cfg) |
| 261 | + |
| 262 | + allowed, reasons, matched = simple_blocked_keyword_check(req.content, cfg) |
| 263 | + |
| 264 | + EVENT_LOG.append( |
| 265 | + EventLogItem( |
| 266 | + id=str(uuid4()), |
| 267 | + tenant_id=req.tenant_id, |
| 268 | + region=req.region or cfg.region_code, |
| 269 | + language=lang, |
| 270 | + event_type="blocked" if not allowed else "allowed", |
| 271 | + created_at=datetime.utcnow(), |
| 272 | + payload={"matched_rules": matched}, |
| 273 | + ).model_dump() |
| 274 | + ) |
| 275 | + |
| 276 | + return PolicyEvaluationResponse( |
| 277 | + allowed=allowed, |
| 278 | + reasons=reasons, |
| 279 | + matched_rules=matched, |
| 280 | + ) |
| 281 | + |
| 282 | + |
| 283 | +@app.post("/v1/globalization/events", response_model=EventLogItem) |
| 284 | +def log_event(ev: EventIn): |
| 285 | + """ |
| 286 | + 通用事件记录接口,方便前端 / 其它服务打点 |
| 287 | + """ |
| 288 | + item = EventLogItem( |
| 289 | + id=str(uuid4()), |
| 290 | + tenant_id=ev.tenant_id, |
| 291 | + region=ev.region, |
| 292 | + language=ev.language, |
| 293 | + event_type=ev.event_type, |
| 294 | + created_at=datetime.utcnow(), |
| 295 | + payload=ev.payload, |
| 296 | + ) |
| 297 | + EVENT_LOG.append(item.model_dump()) |
| 298 | + return item |
| 299 | + |
| 300 | + |
| 301 | +@app.get("/v1/globalization/events", response_model=List[EventLogItem]) |
| 302 | +def list_events(limit: int = 100): |
| 303 | + """ |
| 304 | + 国际化运营看板的数据源: |
| 305 | + - 每条事件包含 tenant / region / language / event_type / payload |
| 306 | + """ |
| 307 | + return EVENT_LOG[-limit:] |
| 308 | + |
| 309 | + |
| 310 | +if __name__ == "__main__": |
| 311 | + import uvicorn |
| 312 | + |
| 313 | + uvicorn.run("app.main:app", host="0.0.0.0", port=8080, reload=True) |
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