137 lines
5.2 KiB
Go
137 lines
5.2 KiB
Go
package oci
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import (
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"bytes"
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"context"
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"fmt"
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"io"
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"net/http"
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"time"
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"github.com/oracle/oci-go-sdk/v65/common"
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)
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// compatResponsesLimit 限制直通响应体大小;web_search 输出含多段引用,给足余量。
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const compatResponsesLimit = int64(8 << 20)
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// dispatcherWithTimeout 把 dispatcher 换成指定总超时的拷贝(保留 Transport,
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// 代理链路不受影响);timeout=0 表示无总超时(流式读 body 不能有总时限)。
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// 非 *http.Client 的自定义 dispatcher 保持原样,维持既有超时行为。
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func dispatcherWithTimeout(d common.HTTPRequestDispatcher, timeout time.Duration) common.HTTPRequestDispatcher {
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hc, ok := d.(*http.Client)
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if !ok {
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return d
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}
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return &http.Client{Transport: hc.Transport, Timeout: timeout}
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}
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// newCompatResponsesRequest 构造 /actions/v1/responses 直通请求。
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func newCompatResponsesRequest(ctx context.Context, cred Credentials, body []byte) (*http.Request, error) {
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request, err := http.NewRequestWithContext(ctx, http.MethodPost, "/actions/v1/responses", bytes.NewReader(body))
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if err != nil {
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return nil, fmt.Errorf("build compat responses request: %w", err)
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}
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request.Header.Set("Content-Type", "application/json")
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request.Header.Set("CompartmentId", cred.TenancyOCID)
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request.Header.Set("opc-compartment-id", cred.TenancyOCID)
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return request, nil
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}
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// GenAiCompatResponses 实现 Client:把 OpenAI Responses 请求体直通到 OCI
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// `/20231130/actions/v1/responses`(IAM 签名)。xAI 服务端工具(web_search /
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// x_search / code_interpreter)与 mcp 已被 Oracle 文档正式支持,工具参数与限制
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// 遵循 xAI 规格;调用方须自行校验并改写请求体(store/stream)。
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// wait 为整请求总超时:非流式上游要等全部生成完才回响应头,SDK 默认 60s 会掐断慢模型。
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func (c *RealClient) GenAiCompatResponses(ctx context.Context, cred Credentials, region string, body []byte, wait time.Duration) ([]byte, error) {
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ic, err := c.genAiInferenceClient(cred, region)
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if err != nil {
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return nil, err
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}
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client := ic.BaseClient
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common.UpdateEndpointTemplateForOptions(&client)
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common.SetMissingTemplateParams(&client)
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client.HTTPClient = dispatcherWithTimeout(client.HTTPClient, wait)
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request, err := newCompatResponsesRequest(ctx, cred, body)
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if err != nil {
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return nil, err
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}
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response, err := client.Call(ctx, request)
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if err != nil {
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return nil, err
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}
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defer response.Body.Close()
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payload, err := readCompatBody(response.Body, compatResponsesLimit, "compat responses")
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if err != nil {
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return nil, err
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}
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return payload, nil
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}
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// cancelReadCloser 在流关闭时同步取消建立阶段派生的 ctx,避免其随流生命周期泄漏。
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type cancelReadCloser struct {
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io.ReadCloser
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cancel context.CancelFunc
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}
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func (c *cancelReadCloser) Close() error {
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c.cancel()
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return c.ReadCloser.Close()
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}
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// httpCaller 抽象 BaseClient.Call,便于对预算逻辑做无签名单测。
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type httpCaller interface {
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Call(ctx context.Context, request *http.Request) (*http.Response, error)
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}
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// callWithHeaderBudget 以 wait 为等待响应头预算执行调用:预算内未返回则取消
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// 请求(SDK Call 会把 ctx 重绑到请求);响应头到达即解除预算,之后流的生命
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// 周期由 ctx 决定,返回的流 Close 时同步取消派生 ctx。
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func callWithHeaderBudget(ctx context.Context, c httpCaller, req *http.Request, wait time.Duration) (io.ReadCloser, error) {
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callCtx, cancel := context.WithCancel(ctx)
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timer := time.AfterFunc(wait, cancel)
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response, err := c.Call(callCtx, req)
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timer.Stop()
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if err != nil {
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if response != nil && response.Body != nil {
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response.Body.Close()
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}
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cancel()
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return nil, err
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}
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return &cancelReadCloser{ReadCloser: response.Body, cancel: cancel}, nil
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}
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// GenAiCompatResponsesStream 实现 Client:以流式直通 OCI `/actions/v1/responses`,
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// 建立成功(2xx)返回 SSE body(调用方负责 Close);建立失败返回 SDK ServiceError,
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// 与既有渠道切换/熔断错误分类兼容。请求体须由调用方置 stream:true。
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// 总超时置 0(SSE 读 body 不能有总时限);wait 以定时取消模拟等待响应头预算,
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// 响应头到达即解除,此后流的生命周期完全由 ctx(下游客户端断开)决定。
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func (c *RealClient) GenAiCompatResponsesStream(ctx context.Context, cred Credentials, region string, body []byte, wait time.Duration) (io.ReadCloser, error) {
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ic, err := c.genAiInferenceClient(cred, region)
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if err != nil {
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return nil, err
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}
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client := ic.BaseClient
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common.UpdateEndpointTemplateForOptions(&client)
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common.SetMissingTemplateParams(&client)
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client.HTTPClient = dispatcherWithTimeout(client.HTTPClient, 0)
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request, err := newCompatResponsesRequest(ctx, cred, body)
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if err != nil {
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return nil, err
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}
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return callWithHeaderBudget(ctx, client, request, wait)
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}
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// readCompatBody 读取上游响应体并施加上限;读 limit+1 判超报错——
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// 静默截断的 JSON/音频配 200 会被下游当完整成功记账。
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func readCompatBody(body io.Reader, limit int64, tag string) ([]byte, error) {
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payload, err := io.ReadAll(io.LimitReader(body, limit+1))
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if err != nil {
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return nil, fmt.Errorf("read %s body: %w", tag, err)
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}
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if int64(len(payload)) > limit {
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return nil, fmt.Errorf("%s body exceeds %d bytes", tag, limit)
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}
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return payload, nil
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}
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