ce764bf2d9
- Codex CLI 请求仅使用内置 instructions，不再读取 opencode 缓存/回源\n- 新增 gateway.force_codex_cli（环境变量 GATEWAY_FORCE_CODEX_CLI）\n- ForceCodexCLI=true 时转发上游强制 User-Agent=codex_cli_rs/0.0.0\n- 更新 deploy 示例配置
676 lines
18 KiB
Go
676 lines
18 KiB
Go
package service
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import (
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_ "embed"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"os"
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"path/filepath"
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"strings"
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"sync"
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"time"
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)
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const (
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opencodeCodexHeaderURL = "https://raw.githubusercontent.com/anomalyco/opencode/dev/packages/opencode/src/session/prompt/codex_header.txt"
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codexCacheTTL = 15 * time.Minute
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// 避免冷启动首请求被外网/ DNS / GitHub 卡死。
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// http.DefaultClient 默认无超时，网络异常时可能阻塞很久。
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opencodeFetchTimeout = 3 * time.Second
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// 本地缓存为空时，最小回源间隔（防止并发下反复打 GitHub）。
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opencodeEmptyCacheRefreshInterval = 1 * time.Minute
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// 防抖：防止短时间内重复触发异步回源。
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opencodeFetchDebounce = 3 * time.Second
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)
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var opencodeFetchHTTPClient = &http.Client{Timeout: opencodeFetchTimeout}
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var (
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opencodeFetchMu sync.Mutex
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opencodeFetchInFlight bool
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opencodeFetchLastStart time.Time
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)
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//go:embed prompts/codex_cli_instructions.md
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var codexCLIInstructions string
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var codexModelMap = map[string]string{
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"gpt-5.3": "gpt-5.3",
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"gpt-5.3-none": "gpt-5.3",
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"gpt-5.3-low": "gpt-5.3",
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"gpt-5.3-medium": "gpt-5.3",
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"gpt-5.3-high": "gpt-5.3",
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"gpt-5.3-xhigh": "gpt-5.3",
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"gpt-5.3-codex": "gpt-5.3-codex",
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"gpt-5.3-codex-low": "gpt-5.3-codex",
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"gpt-5.3-codex-medium": "gpt-5.3-codex",
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"gpt-5.3-codex-high": "gpt-5.3-codex",
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"gpt-5.3-codex-xhigh": "gpt-5.3-codex",
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"gpt-5.1-codex": "gpt-5.1-codex",
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"gpt-5.1-codex-low": "gpt-5.1-codex",
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"gpt-5.1-codex-medium": "gpt-5.1-codex",
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"gpt-5.1-codex-high": "gpt-5.1-codex",
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"gpt-5.1-codex-max": "gpt-5.1-codex-max",
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"gpt-5.1-codex-max-low": "gpt-5.1-codex-max",
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"gpt-5.1-codex-max-medium": "gpt-5.1-codex-max",
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"gpt-5.1-codex-max-high": "gpt-5.1-codex-max",
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"gpt-5.1-codex-max-xhigh": "gpt-5.1-codex-max",
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"gpt-5.2": "gpt-5.2",
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"gpt-5.2-none": "gpt-5.2",
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"gpt-5.2-low": "gpt-5.2",
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"gpt-5.2-medium": "gpt-5.2",
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"gpt-5.2-high": "gpt-5.2",
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"gpt-5.2-xhigh": "gpt-5.2",
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"gpt-5.2-codex": "gpt-5.2-codex",
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"gpt-5.2-codex-low": "gpt-5.2-codex",
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"gpt-5.2-codex-medium": "gpt-5.2-codex",
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"gpt-5.2-codex-high": "gpt-5.2-codex",
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"gpt-5.2-codex-xhigh": "gpt-5.2-codex",
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"gpt-5.1-codex-mini": "gpt-5.1-codex-mini",
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"gpt-5.1-codex-mini-medium": "gpt-5.1-codex-mini",
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"gpt-5.1-codex-mini-high": "gpt-5.1-codex-mini",
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"gpt-5.1": "gpt-5.1",
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"gpt-5.1-none": "gpt-5.1",
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"gpt-5.1-low": "gpt-5.1",
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"gpt-5.1-medium": "gpt-5.1",
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"gpt-5.1-high": "gpt-5.1",
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"gpt-5.1-chat-latest": "gpt-5.1",
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"gpt-5-codex": "gpt-5.1-codex",
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"codex-mini-latest": "gpt-5.1-codex-mini",
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"gpt-5-codex-mini": "gpt-5.1-codex-mini",
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"gpt-5-codex-mini-medium": "gpt-5.1-codex-mini",
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"gpt-5-codex-mini-high": "gpt-5.1-codex-mini",
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"gpt-5": "gpt-5.1",
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"gpt-5-mini": "gpt-5.1",
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"gpt-5-nano": "gpt-5.1",
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}
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type codexTransformResult struct {
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Modified bool
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NormalizedModel string
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PromptCacheKey string
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}
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type opencodeCacheMetadata struct {
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ETag string `json:"etag"`
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LastFetch string `json:"lastFetch,omitempty"`
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LastChecked int64 `json:"lastChecked"`
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}
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func applyCodexOAuthTransform(reqBody map[string]any, isCodexCLI bool) codexTransformResult {
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result := codexTransformResult{}
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// 工具续链需求会影响存储策略与 input 过滤逻辑。
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needsToolContinuation := NeedsToolContinuation(reqBody)
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model := ""
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if v, ok := reqBody["model"].(string); ok {
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model = v
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}
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normalizedModel := normalizeCodexModel(model)
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if normalizedModel != "" {
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if model != normalizedModel {
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reqBody["model"] = normalizedModel
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result.Modified = true
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}
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result.NormalizedModel = normalizedModel
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}
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// OAuth 走 ChatGPT internal API 时，store 必须为 false；显式 true 也会强制覆盖。
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// 避免上游返回 "Store must be set to false"。
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if v, ok := reqBody["store"].(bool); !ok || v {
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reqBody["store"] = false
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result.Modified = true
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}
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if v, ok := reqBody["stream"].(bool); !ok || !v {
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reqBody["stream"] = true
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result.Modified = true
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}
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if _, ok := reqBody["max_output_tokens"]; ok {
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delete(reqBody, "max_output_tokens")
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result.Modified = true
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}
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if _, ok := reqBody["max_completion_tokens"]; ok {
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delete(reqBody, "max_completion_tokens")
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result.Modified = true
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}
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if normalizeCodexTools(reqBody) {
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result.Modified = true
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}
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if v, ok := reqBody["prompt_cache_key"].(string); ok {
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result.PromptCacheKey = strings.TrimSpace(v)
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}
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// instructions 处理逻辑：根据是否是 Codex CLI 分别调用不同方法
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if applyInstructions(reqBody, isCodexCLI) {
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result.Modified = true
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}
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// 续链场景保留 item_reference 与 id，避免 call_id 上下文丢失。
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if input, ok := reqBody["input"].([]any); ok {
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input = filterCodexInput(input, needsToolContinuation)
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reqBody["input"] = input
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result.Modified = true
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}
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return result
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}
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func normalizeCodexModel(model string) string {
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if model == "" {
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return "gpt-5.1"
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}
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modelID := model
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if strings.Contains(modelID, "/") {
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parts := strings.Split(modelID, "/")
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modelID = parts[len(parts)-1]
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}
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if mapped := getNormalizedCodexModel(modelID); mapped != "" {
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return mapped
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}
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normalized := strings.ToLower(modelID)
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if strings.Contains(normalized, "gpt-5.2-codex") || strings.Contains(normalized, "gpt 5.2 codex") {
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return "gpt-5.2-codex"
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}
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if strings.Contains(normalized, "gpt-5.2") || strings.Contains(normalized, "gpt 5.2") {
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return "gpt-5.2"
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}
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if strings.Contains(normalized, "gpt-5.3-codex") || strings.Contains(normalized, "gpt 5.3 codex") {
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return "gpt-5.3-codex"
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}
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if strings.Contains(normalized, "gpt-5.3") || strings.Contains(normalized, "gpt 5.3") {
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return "gpt-5.3"
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}
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if strings.Contains(normalized, "gpt-5.1-codex-max") || strings.Contains(normalized, "gpt 5.1 codex max") {
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return "gpt-5.1-codex-max"
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}
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if strings.Contains(normalized, "gpt-5.1-codex-mini") || strings.Contains(normalized, "gpt 5.1 codex mini") {
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return "gpt-5.1-codex-mini"
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}
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if strings.Contains(normalized, "codex-mini-latest") ||
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strings.Contains(normalized, "gpt-5-codex-mini") ||
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strings.Contains(normalized, "gpt 5 codex mini") {
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return "codex-mini-latest"
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}
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if strings.Contains(normalized, "gpt-5.1-codex") || strings.Contains(normalized, "gpt 5.1 codex") {
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return "gpt-5.1-codex"
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}
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if strings.Contains(normalized, "gpt-5.1") || strings.Contains(normalized, "gpt 5.1") {
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return "gpt-5.1"
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}
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if strings.Contains(normalized, "codex") {
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return "gpt-5.1-codex"
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}
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if strings.Contains(normalized, "gpt-5") || strings.Contains(normalized, "gpt 5") {
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return "gpt-5.1"
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}
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return "gpt-5.1"
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}
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func getNormalizedCodexModel(modelID string) string {
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if modelID == "" {
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return ""
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}
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if mapped, ok := codexModelMap[modelID]; ok {
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return mapped
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}
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lower := strings.ToLower(modelID)
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for key, value := range codexModelMap {
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if strings.ToLower(key) == lower {
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return value
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}
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}
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return ""
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}
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func getOpenCodeCachedPrompt(url, cacheFileName, metaFileName string) string {
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cacheDir := codexCachePath("")
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if cacheDir == "" {
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return ""
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}
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cacheFile := filepath.Join(cacheDir, cacheFileName)
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metaFile := filepath.Join(cacheDir, metaFileName)
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var cachedContent string
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if content, ok := readFile(cacheFile); ok {
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cachedContent = content
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}
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var meta opencodeCacheMetadata
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_ = loadJSON(metaFile, &meta)
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if meta.LastChecked > 0 {
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lastCheckedAt := time.UnixMilli(meta.LastChecked)
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if cachedContent != "" {
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if time.Since(lastCheckedAt) < codexCacheTTL {
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return cachedContent
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}
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} else {
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// 没有任何缓存内容时，回源失败也不应影响请求链路；这里做节流，避免并发下反复回源。
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if time.Since(lastCheckedAt) < opencodeEmptyCacheRefreshInterval {
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return ""
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}
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}
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}
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// 不在请求链路内同步拉取（GitHub/DNS/网络异常会导致冷启动首请求卡 1 分钟+）。
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// 直接返回当前缓存（可为空），并异步刷新缓存。
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scheduleOpencodeCacheRefresh(url, cacheFile, metaFile, meta.ETag)
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return cachedContent
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}
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func scheduleOpencodeCacheRefresh(url, cacheFile, metaFile, etag string) {
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opencodeFetchMu.Lock()
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if opencodeFetchInFlight {
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opencodeFetchMu.Unlock()
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return
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}
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if !opencodeFetchLastStart.IsZero() && time.Since(opencodeFetchLastStart) < opencodeFetchDebounce {
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opencodeFetchMu.Unlock()
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return
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}
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opencodeFetchInFlight = true
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opencodeFetchLastStart = time.Now()
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opencodeFetchMu.Unlock()
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go func() {
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defer func() {
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opencodeFetchMu.Lock()
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opencodeFetchInFlight = false
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opencodeFetchMu.Unlock()
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}()
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now := time.Now()
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content, newETag, status, err := fetchWithETag(url, etag)
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var meta opencodeCacheMetadata
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_ = loadJSON(metaFile, &meta)
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meta.LastChecked = now.UnixMilli()
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switch {
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case err == nil && status == http.StatusNotModified:
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// 304 表示无需更新缓存文件，只更新检查时间。
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if newETag != "" {
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meta.ETag = newETag
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}
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_ = writeJSON(metaFile, meta)
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case err == nil && status >= 200 && status < 300 && strings.TrimSpace(content) != "":
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_ = writeFile(cacheFile, content)
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meta.ETag = newETag
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meta.LastFetch = now.UTC().Format(time.RFC3339)
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_ = writeJSON(metaFile, meta)
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default:
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// 拉取失败也记录检查时间，避免高并发下持续回源。
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_ = writeJSON(metaFile, meta)
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}
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}()
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}
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func getOpenCodeCodexHeader() string {
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// 优先从 opencode 仓库缓存获取指令。
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opencodeInstructions := getOpenCodeCachedPrompt(opencodeCodexHeaderURL, "opencode-codex-header.txt", "opencode-codex-header-meta.json")
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// 若 opencode 指令可用，直接返回。
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if opencodeInstructions != "" {
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return opencodeInstructions
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}
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// 否则回退使用本地 Codex CLI 指令。
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return getCodexCLIInstructions()
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}
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func getCodexCLIInstructions() string {
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return codexCLIInstructions
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}
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func GetOpenCodeInstructions() string {
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return getOpenCodeCodexHeader()
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}
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// GetCodexCLIInstructions 返回内置的 Codex CLI 指令内容。
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func GetCodexCLIInstructions() string {
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return getCodexCLIInstructions()
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}
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// applyInstructions 处理 instructions 字段
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// isCodexCLI=true: 仅补充缺失的 instructions（使用内置 Codex CLI 指令）
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// isCodexCLI=false: 优先使用 opencode 指令覆盖（不可用时回退到内置 Codex CLI 指令）
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func applyInstructions(reqBody map[string]any, isCodexCLI bool) bool {
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if isCodexCLI {
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return applyCodexCLIInstructions(reqBody)
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}
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return applyOpenCodeInstructions(reqBody)
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}
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// applyCodexCLIInstructions 为 Codex CLI 请求补充缺失的 instructions
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// 仅在 instructions 为空时添加内置 Codex CLI 指令（不依赖 opencode 缓存/回源）
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func applyCodexCLIInstructions(reqBody map[string]any) bool {
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if !isInstructionsEmpty(reqBody) {
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return false // 已有有效 instructions，不修改
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}
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instructions := strings.TrimSpace(getCodexCLIInstructions())
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if instructions != "" {
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reqBody["instructions"] = instructions
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return true
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}
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return false
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}
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// applyOpenCodeInstructions 为非 Codex CLI 请求应用 opencode 指令
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// 优先使用 opencode 指令覆盖
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func applyOpenCodeInstructions(reqBody map[string]any) bool {
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instructions := strings.TrimSpace(getOpenCodeCodexHeader())
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existingInstructions, _ := reqBody["instructions"].(string)
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existingInstructions = strings.TrimSpace(existingInstructions)
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if instructions != "" {
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if existingInstructions != instructions {
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reqBody["instructions"] = instructions
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return true
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}
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} else if existingInstructions == "" {
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codexInstructions := strings.TrimSpace(getCodexCLIInstructions())
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if codexInstructions != "" {
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reqBody["instructions"] = codexInstructions
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return true
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}
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}
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return false
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}
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// isInstructionsEmpty 检查 instructions 字段是否为空
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// 处理以下情况：字段不存在、nil、空字符串、纯空白字符串
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func isInstructionsEmpty(reqBody map[string]any) bool {
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val, exists := reqBody["instructions"]
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if !exists {
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return true
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}
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if val == nil {
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return true
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}
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str, ok := val.(string)
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if !ok {
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return true
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}
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return strings.TrimSpace(str) == ""
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}
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// ReplaceWithCodexInstructions 将请求 instructions 替换为内置 Codex 指令（必要时）。
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func ReplaceWithCodexInstructions(reqBody map[string]any) bool {
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codexInstructions := strings.TrimSpace(getCodexCLIInstructions())
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if codexInstructions == "" {
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return false
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}
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existingInstructions, _ := reqBody["instructions"].(string)
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if strings.TrimSpace(existingInstructions) != codexInstructions {
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reqBody["instructions"] = codexInstructions
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return true
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}
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return false
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}
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// IsInstructionError 判断错误信息是否与指令格式/系统提示相关。
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func IsInstructionError(errorMessage string) bool {
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if errorMessage == "" {
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return false
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}
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lowerMsg := strings.ToLower(errorMessage)
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instructionKeywords := []string{
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"instruction",
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"instructions",
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"system prompt",
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"system message",
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"invalid prompt",
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"prompt format",
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}
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for _, keyword := range instructionKeywords {
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if strings.Contains(lowerMsg, keyword) {
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return true
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}
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}
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return false
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}
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// filterCodexInput 按需过滤 item_reference 与 id。
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// preserveReferences 为 true 时保持引用与 id，以满足续链请求对上下文的依赖。
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func filterCodexInput(input []any, preserveReferences bool) []any {
|
||
filtered := make([]any, 0, len(input))
|
||
for _, item := range input {
|
||
m, ok := item.(map[string]any)
|
||
if !ok {
|
||
filtered = append(filtered, item)
|
||
continue
|
||
}
|
||
typ, _ := m["type"].(string)
|
||
if typ == "item_reference" {
|
||
if !preserveReferences {
|
||
continue
|
||
}
|
||
newItem := make(map[string]any, len(m))
|
||
for key, value := range m {
|
||
newItem[key] = value
|
||
}
|
||
filtered = append(filtered, newItem)
|
||
continue
|
||
}
|
||
|
||
newItem := m
|
||
copied := false
|
||
// 仅在需要修改字段时创建副本，避免直接改写原始输入。
|
||
ensureCopy := func() {
|
||
if copied {
|
||
return
|
||
}
|
||
newItem = make(map[string]any, len(m))
|
||
for key, value := range m {
|
||
newItem[key] = value
|
||
}
|
||
copied = true
|
||
}
|
||
|
||
if isCodexToolCallItemType(typ) {
|
||
if callID, ok := m["call_id"].(string); !ok || strings.TrimSpace(callID) == "" {
|
||
if id, ok := m["id"].(string); ok && strings.TrimSpace(id) != "" {
|
||
ensureCopy()
|
||
newItem["call_id"] = id
|
||
}
|
||
}
|
||
}
|
||
|
||
if !preserveReferences {
|
||
ensureCopy()
|
||
delete(newItem, "id")
|
||
if !isCodexToolCallItemType(typ) {
|
||
delete(newItem, "call_id")
|
||
}
|
||
}
|
||
|
||
filtered = append(filtered, newItem)
|
||
}
|
||
return filtered
|
||
}
|
||
|
||
func isCodexToolCallItemType(typ string) bool {
|
||
if typ == "" {
|
||
return false
|
||
}
|
||
return strings.HasSuffix(typ, "_call") || strings.HasSuffix(typ, "_call_output")
|
||
}
|
||
|
||
func normalizeCodexTools(reqBody map[string]any) bool {
|
||
rawTools, ok := reqBody["tools"]
|
||
if !ok || rawTools == nil {
|
||
return false
|
||
}
|
||
tools, ok := rawTools.([]any)
|
||
if !ok {
|
||
return false
|
||
}
|
||
|
||
modified := false
|
||
validTools := make([]any, 0, len(tools))
|
||
|
||
for _, tool := range tools {
|
||
toolMap, ok := tool.(map[string]any)
|
||
if !ok {
|
||
// Keep unknown structure as-is to avoid breaking upstream behavior.
|
||
validTools = append(validTools, tool)
|
||
continue
|
||
}
|
||
|
||
toolType, _ := toolMap["type"].(string)
|
||
toolType = strings.TrimSpace(toolType)
|
||
if toolType != "function" {
|
||
validTools = append(validTools, toolMap)
|
||
continue
|
||
}
|
||
|
||
// OpenAI Responses-style tools use top-level name/parameters.
|
||
if name, ok := toolMap["name"].(string); ok && strings.TrimSpace(name) != "" {
|
||
validTools = append(validTools, toolMap)
|
||
continue
|
||
}
|
||
|
||
// ChatCompletions-style tools use {type:"function", function:{...}}.
|
||
functionValue, hasFunction := toolMap["function"]
|
||
function, ok := functionValue.(map[string]any)
|
||
if !hasFunction || functionValue == nil || !ok || function == nil {
|
||
// Drop invalid function tools.
|
||
modified = true
|
||
continue
|
||
}
|
||
|
||
if _, ok := toolMap["name"]; !ok {
|
||
if name, ok := function["name"].(string); ok && strings.TrimSpace(name) != "" {
|
||
toolMap["name"] = name
|
||
modified = true
|
||
}
|
||
}
|
||
if _, ok := toolMap["description"]; !ok {
|
||
if desc, ok := function["description"].(string); ok && strings.TrimSpace(desc) != "" {
|
||
toolMap["description"] = desc
|
||
modified = true
|
||
}
|
||
}
|
||
if _, ok := toolMap["parameters"]; !ok {
|
||
if params, ok := function["parameters"]; ok {
|
||
toolMap["parameters"] = params
|
||
modified = true
|
||
}
|
||
}
|
||
if _, ok := toolMap["strict"]; !ok {
|
||
if strict, ok := function["strict"]; ok {
|
||
toolMap["strict"] = strict
|
||
modified = true
|
||
}
|
||
}
|
||
|
||
validTools = append(validTools, toolMap)
|
||
}
|
||
|
||
if modified {
|
||
reqBody["tools"] = validTools
|
||
}
|
||
|
||
return modified
|
||
}
|
||
|
||
func codexCachePath(filename string) string {
|
||
home, err := os.UserHomeDir()
|
||
if err != nil {
|
||
return ""
|
||
}
|
||
cacheDir := filepath.Join(home, ".opencode", "cache")
|
||
if filename == "" {
|
||
return cacheDir
|
||
}
|
||
return filepath.Join(cacheDir, filename)
|
||
}
|
||
|
||
func readFile(path string) (string, bool) {
|
||
if path == "" {
|
||
return "", false
|
||
}
|
||
data, err := os.ReadFile(path)
|
||
if err != nil {
|
||
return "", false
|
||
}
|
||
return string(data), true
|
||
}
|
||
|
||
func writeFile(path, content string) error {
|
||
if path == "" {
|
||
return fmt.Errorf("empty cache path")
|
||
}
|
||
if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
|
||
return err
|
||
}
|
||
return os.WriteFile(path, []byte(content), 0o644)
|
||
}
|
||
|
||
func loadJSON(path string, target any) bool {
|
||
data, err := os.ReadFile(path)
|
||
if err != nil {
|
||
return false
|
||
}
|
||
if err := json.Unmarshal(data, target); err != nil {
|
||
return false
|
||
}
|
||
return true
|
||
}
|
||
|
||
func writeJSON(path string, value any) error {
|
||
if path == "" {
|
||
return fmt.Errorf("empty json path")
|
||
}
|
||
if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
|
||
return err
|
||
}
|
||
data, err := json.Marshal(value)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
return os.WriteFile(path, data, 0o644)
|
||
}
|
||
|
||
func fetchWithETag(url, etag string) (string, string, int, error) {
|
||
req, err := http.NewRequest(http.MethodGet, url, nil)
|
||
if err != nil {
|
||
return "", "", 0, err
|
||
}
|
||
req.Header.Set("User-Agent", "sub2api-codex")
|
||
if etag != "" {
|
||
req.Header.Set("If-None-Match", etag)
|
||
}
|
||
resp, err := opencodeFetchHTTPClient.Do(req)
|
||
if err != nil {
|
||
return "", "", 0, err
|
||
}
|
||
defer func() {
|
||
_ = resp.Body.Close()
|
||
}()
|
||
|
||
body, err := io.ReadAll(resp.Body)
|
||
if err != nil {
|
||
return "", "", resp.StatusCode, err
|
||
}
|
||
return string(body), resp.Header.Get("etag"), resp.StatusCode, nil
|
||
}
|