486 lines
13 KiB
TypeScript
486 lines
13 KiB
TypeScript
/**
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* Typed wrapper around the `claude` CLI in `-p` (one-shot) mode with
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* `--output-format json`. We rely on `claude` being available on PATH;
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* callers should surface the install-hint error message to the user when
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* ENOENT is raised.
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*
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* Two execution paths share the same output-parsing logic:
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*
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* - **Text-only** (no images): plain `claude -p "<prompt>" --output-format json`
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* via `spawn` with stdin ignored so the CLI does not wait for piped input.
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*
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* - **With images**: switch to `claude -p --input-format stream-json
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* --output-format json` via `spawn`, then feed a single NDJSON line on
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* stdin containing the user message with text + image content blocks
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* (Anthropic Messages API shape). The official docs state single-message
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* input does NOT support image attachments — stream-json is the only
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* supported path. See:
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* https://code.claude.com/docs/en/agent-sdk/streaming-vs-single-mode
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*/
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import { spawn } from 'node:child_process'
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const DEFAULT_TIMEOUT_MS = 300_000
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const MAX_BUFFER_BYTES = 10 * 1024 * 1024
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const EXIT_DIAGNOSTIC_MAX_CHARS = 2000
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export interface ClaudeImage {
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/** e.g. "image/png", "image/jpeg", "image/webp", "image/gif" */
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mediaType: string
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/** Raw base64 (no `data:...;base64,` prefix) */
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base64: string
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}
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export interface ClaudeResult {
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sessionId: string
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resultText: string
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rawJson: string
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}
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export class ClaudeError extends Error {
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constructor(message: string, public readonly stderr: string) {
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super(message)
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this.name = 'ClaudeError'
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}
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}
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export class ClaudeTimeoutError extends ClaudeError {
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constructor(message: string, stderr: string) {
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super(message, stderr)
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this.name = 'ClaudeTimeoutError'
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}
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}
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interface ParsedClaudeJson {
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session_id: string
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result: string
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}
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function tryParseClaudeJson(text: string): ParsedClaudeJson | null {
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let parsed: unknown
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try {
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parsed = JSON.parse(text)
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}
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catch {
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return null
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}
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if (
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parsed
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&& typeof parsed === 'object'
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&& 'result' in parsed
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&& 'session_id' in parsed
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) {
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const obj = parsed as Record<string, unknown>
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if (typeof obj.result === 'string' && typeof obj.session_id === 'string') {
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return { session_id: obj.session_id, result: obj.result }
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}
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}
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return null
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}
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function extractClaudePayload(stdout: string): ParsedClaudeJson | null {
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const trimmed = stdout.trim()
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if (!trimmed)
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return null
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const direct = tryParseClaudeJson(trimmed)
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if (direct)
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return direct
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// Fallback: streaming JSON (one object per line). Walk from the end to
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// find the last line that parses with the right shape.
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const lines = trimmed.split('\n')
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for (let i = lines.length - 1; i >= 0; i--) {
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const line = lines[i].trim()
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if (!line)
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continue
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const candidate = tryParseClaudeJson(line)
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if (candidate)
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return candidate
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}
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return null
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}
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function truncateDiagnostic(text: string): string {
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if (text.length <= EXIT_DIAGNOSTIC_MAX_CHARS)
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return text
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return `${text.slice(0, EXIT_DIAGNOSTIC_MAX_CHARS)}…`
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}
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function formatDiagnosticValue(value: unknown): string | null {
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if (typeof value === 'string') {
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const trimmed = value.trim()
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return trimmed || null
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}
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if (typeof value === 'number' || typeof value === 'boolean')
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return String(value)
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if (value && typeof value === 'object') {
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try {
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return JSON.stringify(value)
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}
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catch {
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return null
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}
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}
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return null
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}
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function extractJsonDiagnostic(text: string): string | null {
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let parsed: unknown
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try {
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parsed = JSON.parse(text)
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}
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catch {
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return null
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}
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if (!parsed || typeof parsed !== 'object')
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return null
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const obj = parsed as Record<string, unknown>
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for (const key of ['error', 'message', 'result', 'summary']) {
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const diagnostic = formatDiagnosticValue(obj[key])
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if (diagnostic)
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return truncateDiagnostic(diagnostic)
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}
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return null
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}
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function extractStdoutDiagnostic(stdout: string): string | null {
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const trimmed = stdout.trim()
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if (!trimmed)
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return null
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const direct = extractJsonDiagnostic(trimmed)
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if (direct)
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return direct
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const lines = trimmed.split('\n')
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for (let i = lines.length - 1; i >= 0; i--) {
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const line = lines[i].trim()
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if (!line)
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continue
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const diagnostic = extractJsonDiagnostic(line)
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if (diagnostic)
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return diagnostic
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}
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return truncateDiagnostic(trimmed)
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}
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function buildClaudeExitDiagnostic(stderr: string, stdout: string): string {
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const stderrDiagnostic = stderr.trim()
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if (stderrDiagnostic)
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return truncateDiagnostic(stderrDiagnostic)
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return extractStdoutDiagnostic(stdout) ?? '(无 stderr/stdout)'
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}
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function buildStreamJsonLine(prompt: string, images: ClaudeImage[]): string {
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const content: Array<Record<string, unknown>> = [
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{ type: 'text', text: prompt },
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]
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for (const img of images) {
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content.push({
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type: 'image',
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source: {
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type: 'base64',
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media_type: img.mediaType,
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data: img.base64,
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},
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})
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}
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const message = {
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type: 'user',
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message: { role: 'user', content },
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parent_tool_use_id: null,
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}
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return `${JSON.stringify(message)}\n`
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}
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/**
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* 构造后台 claude 子进程的环境变量：从父进程 env 剔除会导致 headless 鉴权
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* 失败或嵌套会话静默退出的变量，让子进程回落到订阅 OAuth 凭据。
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*
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* - ANTHROPIC_API_KEY / ANTHROPIC_AUTH_TOKEN：headless `-p` 无条件优先用它们，
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* 若属于受限/过期 org 会 403 Request not allowed。剔除后回落 ~/.claude 订阅登录。
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* - CLAUDECODE / CLAUDE_CODE_ENTRYPOINT / CLAUDE_CODE_SESSION_ID / CLAUDE_CODE_SESSION：
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* 从父 Claude 会话继承会让子进程当成嵌套会话直接静默退出、零输出。
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*/
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function buildClaudeChildEnv(): NodeJS.ProcessEnv {
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// 剔除所有 ANTHROPIC_* 是为了让 `--settings` profile 成为 provider/鉴权的唯一来源
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// （profile 没配则回落 ~/.claude 订阅 OAuth），避免宿主 env 残留的 BASE_URL/TOKEN
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// 覆盖 profile 导致 403。同时清除嵌套 Claude 会话标记，避免后台 `claude -p` 误判处于嵌套会话。
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const NESTED_GUARDS = new Set([
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'CLAUDECODE',
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'CLAUDE_CODE_ENTRYPOINT',
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'CLAUDE_CODE_SESSION_ID',
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'CLAUDE_CODE_SESSION',
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])
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const out: NodeJS.ProcessEnv = {}
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for (const [k, v] of Object.entries(process.env)) {
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if (k.startsWith('ANTHROPIC_'))
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continue
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if (NESTED_GUARDS.has(k))
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continue
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out[k] = v
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}
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return out
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}
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export async function spawnClaude(opts: {
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prompt: string
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cwd: string
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timeoutMs?: number
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images?: ClaudeImage[]
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profilePath?: string
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bare?: boolean
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}): Promise<ClaudeResult> {
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const timeoutMs = opts.timeoutMs ?? DEFAULT_TIMEOUT_MS
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const hasImages = !!opts.images && opts.images.length > 0
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if (!hasImages) {
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return spawnClaudeText(opts.prompt, opts.cwd, timeoutMs, opts.profilePath, opts.bare)
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}
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return spawnClaudeStreamed(opts.prompt, opts.cwd, timeoutMs, opts.images!, opts.profilePath, opts.bare)
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}
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function spawnClaudeText(
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prompt: string,
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cwd: string,
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timeoutMs: number,
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profilePath?: string,
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bare?: boolean,
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): Promise<ClaudeResult> {
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const args = [
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...(bare ? ['--bare'] : []),
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'--dangerously-skip-permissions',
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...(profilePath ? ['--settings', profilePath] : []),
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'-p',
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prompt,
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'--output-format',
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'json',
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]
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return new Promise<ClaudeResult>((resolve, reject) => {
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let stdout = ''
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let stderr = ''
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let stdoutBytes = 0
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let settled = false
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const child = spawn('claude', args, {
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cwd,
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env: buildClaudeChildEnv(),
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stdio: ['ignore', 'pipe', 'pipe'],
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})
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const timer = setTimeout(() => {
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if (settled)
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return
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settled = true
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child.kill('SIGKILL')
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reject(new ClaudeTimeoutError(
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`Claude 调用超时（${Math.round(timeoutMs / 1000)}s）`,
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stderr,
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))
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}, timeoutMs)
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child.on('error', (err) => {
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if (settled)
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return
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settled = true
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clearTimeout(timer)
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const errCode = (err as NodeJS.ErrnoException).code
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if (errCode === 'ENOENT') {
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reject(new ClaudeError(
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'未检测到 claude CLI，请确认已安装并在 PATH 中',
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stderr,
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))
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return
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}
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reject(new ClaudeError(
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`Claude 调用失败: ${err.message}`,
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stderr,
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))
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})
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child.stdout.on('data', (chunk: Buffer) => {
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stdoutBytes += chunk.length
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if (stdoutBytes > MAX_BUFFER_BYTES) {
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if (settled)
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return
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settled = true
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clearTimeout(timer)
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child.kill('SIGKILL')
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reject(new ClaudeError(
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`Claude 输出超过 ${MAX_BUFFER_BYTES} bytes`,
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stderr,
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))
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return
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}
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stdout += chunk.toString('utf8')
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})
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child.stderr.on('data', (chunk: Buffer) => {
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stderr += chunk.toString('utf8')
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})
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child.on('close', (code) => {
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if (settled)
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return
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settled = true
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clearTimeout(timer)
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if (code !== 0) {
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reject(new ClaudeError(
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`Claude 退出码非零 (${code}): ${buildClaudeExitDiagnostic(stderr, stdout)}`,
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stderr,
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))
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return
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}
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const payload = extractClaudePayload(stdout)
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if (!payload) {
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reject(new ClaudeError(
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'Claude 返回异常: 无法解析 JSON 输出',
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stdout,
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))
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return
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}
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resolve({
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sessionId: payload.session_id,
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resultText: payload.result,
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rawJson: stdout,
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})
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})
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})
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}
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function spawnClaudeStreamed(
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prompt: string,
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cwd: string,
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timeoutMs: number,
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images: ClaudeImage[],
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profilePath?: string,
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bare?: boolean,
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): Promise<ClaudeResult> {
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// Local Claude Code v2.1.143 enforces that --input-format=stream-json must
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// be paired with --output-format=stream-json (the friendlier `--output-format
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// json` is rejected). The output is NDJSON; extractClaudePayload walks lines
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// from the end to find the final result-shaped object.
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const args = [
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...(bare ? ['--bare'] : []),
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'--dangerously-skip-permissions',
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...(profilePath ? ['--settings', profilePath] : []),
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'-p',
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'--input-format',
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'stream-json',
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'--output-format',
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'stream-json',
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'--verbose',
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]
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const ndjson = buildStreamJsonLine(prompt, images)
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return new Promise<ClaudeResult>((resolve, reject) => {
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let stdout = ''
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let stderr = ''
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let stdoutBytes = 0
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let settled = false
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const child = spawn('claude', args, {
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cwd,
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env: buildClaudeChildEnv(),
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stdio: ['pipe', 'pipe', 'pipe'],
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})
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const timer = setTimeout(() => {
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if (settled)
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return
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settled = true
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child.kill('SIGKILL')
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reject(new ClaudeTimeoutError(
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`Claude 调用超时（${Math.round(timeoutMs / 1000)}s）`,
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stderr,
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))
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}, timeoutMs)
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child.on('error', (err) => {
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if (settled)
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return
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settled = true
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clearTimeout(timer)
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const errCode = (err as NodeJS.ErrnoException).code
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if (errCode === 'ENOENT') {
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reject(new ClaudeError(
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'未检测到 claude CLI，请确认已安装并在 PATH 中',
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stderr,
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))
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return
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}
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reject(new ClaudeError(
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`Claude 调用失败: ${err.message}`,
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stderr,
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))
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})
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child.stdout.on('data', (chunk: Buffer) => {
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stdoutBytes += chunk.length
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if (stdoutBytes > MAX_BUFFER_BYTES) {
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if (settled)
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return
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settled = true
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clearTimeout(timer)
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child.kill('SIGKILL')
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reject(new ClaudeError(
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`Claude 输出超过 ${MAX_BUFFER_BYTES} bytes`,
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stderr,
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))
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return
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}
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stdout += chunk.toString('utf8')
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})
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child.stderr.on('data', (chunk: Buffer) => {
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stderr += chunk.toString('utf8')
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})
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child.on('close', (code) => {
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if (settled)
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return
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settled = true
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clearTimeout(timer)
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if (code !== 0) {
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reject(new ClaudeError(
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`Claude 退出码非零 (${code}): ${buildClaudeExitDiagnostic(stderr, stdout)}`,
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stderr,
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))
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return
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}
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const payload = extractClaudePayload(stdout)
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if (!payload) {
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reject(new ClaudeError(
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'Claude 返回异常: 无法解析 JSON 输出',
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stdout,
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))
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return
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}
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resolve({
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sessionId: payload.session_id,
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resultText: payload.result,
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rawJson: stdout,
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})
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})
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// Send the single NDJSON line and close stdin so claude knows the user
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// turn is complete. If the child has already exited (e.g. arg validation
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// failed), stdin will EPIPE — swallow it; the 'close' handler will surface
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// the real error from stderr + exit code.
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child.stdin.on('error', () => { /* ignore EPIPE / ECONNRESET */ })
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try {
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child.stdin.write(ndjson)
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child.stdin.end()
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}
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catch {
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// child already gone; close handler will run with the error code.
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}
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})
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}
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