# Feature Specification: Universal HTTP Client for Multi-Platform Account Management

**Feature Branch**: `002-httpclient-http-api`
**Created**: 2025-09-28
**Status**: Draft
**Input**: User description: "通用的 httpClient ，方便不同平台的账户去调用对应的 http api"

## Execution Flow (main)
```
1. Parse user description from Input
   → Extract: "universal HTTP client for different platform accounts to call their respective HTTP APIs"
2. Extract key concepts from description
   → Actors: Trading accounts, Platform APIs, HTTP requests
   → Actions: Make HTTP calls, Handle responses, Manage authentication
   → Data: API requests/responses, authentication credentials, platform configurations
   → Constraints: Platform-specific requirements, Rate limiting, Error handling
3. For each unclear aspect:
   → [MARKED BELOW in requirements section]
4. Fill User Scenarios & Testing section
   → User flow: Account → HTTP Client → Platform API → Response handling
5. Generate Functional Requirements
   → Each requirement focused on user needs and testable outcomes
6. Identify Key Entities (HTTP client, accounts, platforms, requests/responses)
7. Run Review Checklist
   → WARN "Spec has several NEEDS CLARIFICATION items for user review"
8. Return: SUCCESS (spec ready for planning)
```

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## ⚡ Quick Guidelines
- ✅ Focus on WHAT users need and WHY
- ❌ Avoid HOW to implement (no tech stack, APIs, code structure)
- 👥 Written for business stakeholders, not developers

---

## Clarifications

### Session 2025-09-28
- Q: 性能和可靠性目标未明确指定。HTTP客户端的可接受性能标准是什么？ → A: 高性能：<100ms响应时间，99.9%可用性，支持1000+并发请求
- Q: 各平台的认证方法未明确。系统应如何处理不同平台的身份认证？ → A: 凭证管理器：集成现有的凭证管理库进行认证
- Q: 重试逻辑和错误恢复策略未明确。系统在遇到失败时应如何处理？ → A: 智能重试：根据错误类型选择策略(网络错误重试，认证错误不重试)
- Q: 日志记录的详细程度和保留要求未明确。系统应如何记录和保存日志？ → A: 完整日志：记录所有请求/响应内容，保留30天，包含敏感数据
- Q: 超时值和代理配置的具体要求未明确。系统应使用什么超时设置和代理策略？ → A: 分层超时：连接5秒，读取30秒，写入15秒，支持HTTP代理

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## User Scenarios & Testing *(mandatory)*

### Primary User Story
As a trading system operator, I need a unified way for different platform accounts (Pacifica, Aster, Binance) to make HTTP API calls to their respective exchanges, so that account management, order placement, and data retrieval operations work consistently across all platforms without requiring platform-specific client implementations.

### Acceptance Scenarios
1. **Given** a Pacifica account needs to check balances, **When** the HTTP client is used to make the API call, **Then** the request is properly authenticated with Pacifica credentials and returns accurate balance data
2. **Given** an Aster account needs to place an order, **When** the HTTP client processes the request, **Then** the order is submitted with correct Aster-specific authentication and formatting
3. **Given** multiple platform accounts need to make simultaneous API calls, **When** the HTTP client handles concurrent requests, **Then** each request uses the correct platform-specific configuration and credentials without cross-contamination
4. **Given** a platform API is temporarily unavailable, **When** the HTTP client attempts a request, **Then** appropriate retry logic and error handling prevent system failures and provide meaningful error messages

### Edge Cases
- What happens when API credentials expire or become invalid during operation?
- How does the system handle rate limiting responses from different platforms with varying limit structures?
- What occurs when proxy configurations are required for certain accounts but not others?
- How are platform-specific request formats and response parsing handled uniformly?

## Requirements *(mandatory)*

### Functional Requirements
- **FR-001**: System MUST support multiple trading platform accounts (Pacifica, Aster, Binance) making HTTP API calls through a unified interface
- **FR-002**: System MUST integrate with the existing credential manager library to authenticate each request using platform-specific credentials and signing methods
- **FR-003**: System MUST handle platform-specific request formatting and response parsing without exposing implementation differences to calling code
- **FR-004**: System MUST implement intelligent retry logic based on error type: network/timeout errors use exponential backoff retry, authentication errors fail immediately, rate limiting errors wait according to platform headers
- **FR-005**: System MUST support concurrent requests from multiple accounts without credential mixing or authentication conflicts
- **FR-006**: System MUST log complete request and response data including headers, body, and sensitive information with 30-day retention for debugging and compliance purposes
- **FR-007**: System MUST support HTTP proxy configurations for accounts requiring network routing through proxy servers
- **FR-008**: System MUST validate request parameters and response data to ensure API contract compliance [NEEDS CLARIFICATION: validation rules and error handling for invalid data not specified]
- **FR-009**: System MUST maintain request rate limiting to comply with each platform's API usage policies [NEEDS CLARIFICATION: specific rate limits per platform not provided]
- **FR-010**: System MUST implement layered timeout handling: 5 seconds for connection establishment, 30 seconds for response reading, 15 seconds for request writing
- **FR-011**: System MUST achieve response times under 100ms for API calls under normal conditions
- **FR-012**: System MUST maintain 99.9% uptime and availability for trading operations
- **FR-013**: System MUST support at least 1000 concurrent HTTP requests without performance degradation

### Key Entities *(include if feature involves data)*
- **HTTP Client**: Central component that routes requests to appropriate platform handlers and manages authentication
- **Platform Account**: Represents trading account with associated credentials and platform-specific configuration
- **API Request**: Standardized request structure containing endpoint, parameters, and metadata for any platform call
- **API Response**: Standardized response structure containing data, status, and error information from platform APIs
- **Authentication Context**: Manages credentials, tokens, and signing requirements for each platform account
- **Platform Configuration**: Contains API endpoints, rate limits, timeout settings, and other platform-specific settings

---

## Review & Acceptance Checklist
*GATE: Automated checks run during main() execution*

### Content Quality
- [x] No implementation details (languages, frameworks, APIs)
- [x] Focused on user value and business needs
- [x] Written for non-technical stakeholders
- [x] All mandatory sections completed

### Requirement Completeness
- [ ] No [NEEDS CLARIFICATION] markers remain (2 clarification items remaining)
- [x] Requirements are testable and unambiguous
- [x] Success criteria are measurable
- [x] Scope is clearly bounded
- [x] Dependencies and assumptions identified

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## Execution Status
*Updated by main() during processing*

- [x] User description parsed
- [x] Key concepts extracted
- [x] Ambiguities marked (5 major clarifications resolved)
- [x] User scenarios defined
- [x] Requirements generated
- [x] Entities identified
- [x] Review checklist mostly passed (2 minor items deferred)

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