401 lines
14 KiB
Go
401 lines
14 KiB
Go
// 声明式插件的运行期适配器（manifestAdapter）：按清单组装请求、解析响应中的任务 ID、状态与媒体。
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//
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// 媒体提取同时支持 JSON 路径、Markdown 图片、HTML 视频标签与内联 data URL，
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// 兼容不同上游的返回形态。
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package protocol
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import (
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"context"
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"crypto/sha256"
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"encoding/base64"
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"fmt"
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"net/http"
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"regexp"
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"strings"
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)
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type manifestAdapter struct{ manifest Manifest }
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func (a manifestAdapter) Metadata() Metadata { return a.manifest.Metadata }
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func (a manifestAdapter) AgentAvailable() bool {
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return a.manifest.Agent != nil && a.manifest.AgentResponse != nil
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}
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func (a manifestAdapter) ResultAvailable() bool { return a.manifest.ResultOperation != nil }
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func (a manifestAdapter) BuildCreate(_ context.Context, c RequestContext) (RequestSpec, error) {
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if len(a.manifest.Contributes.Providers) == 0 {
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return RequestSpec{}, fmt.Errorf("plugin %s does not provide a provider", a.manifest.Metadata.ID)
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}
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if err := validateManifestRequest(a.manifest.Validations, c.Request); err != nil {
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return RequestSpec{}, err
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}
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return buildManifestOperation(a.manifest.Create, a.manifest.Auth, c.Request, "")
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}
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func (a manifestAdapter) BuildAgent(_ context.Context, c AgentRequestContext) (RequestSpec, error) {
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if a.manifest.Agent == nil {
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return RequestSpec{}, fmt.Errorf("protocol %s has no agent operation", a.manifest.Metadata.ID)
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}
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request := GenerationRequest{Model: c.Model, Extra: map[string]any{"agent": c.Request}}
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return buildManifestOperation(*a.manifest.Agent, a.manifest.Auth, request, "")
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}
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func (a manifestAdapter) ParseAgent(_ context.Context, body []byte) (AgentResult, error) {
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if a.manifest.AgentResponse == nil {
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return AgentResult{}, fmt.Errorf("protocol %s has no agent response mapping", a.manifest.Metadata.ID)
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}
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payload, err := decodeObject(body)
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if err != nil {
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return AgentResult{}, err
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}
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response := a.manifest.AgentResponse
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result := AgentResult{Text: firstPathValue(payload, response.TextPaths...), Reasoning: firstPathValue(payload, response.ReasoningPaths...)}
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if response.ToolCallsPath == "" {
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return result, nil
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}
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for index, item := range arrayValue(pathValue(payload, response.ToolCallsPath)) {
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object, ok := item.(map[string]any)
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if !ok {
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continue
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}
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call := AgentToolCall{
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ID: firstPathValue(object, response.ToolCallIDPaths...),
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Name: firstPathValue(object, response.ToolCallNamePaths...),
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Arguments: firstPathJSONValue(object, response.ToolCallArgsPaths...),
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ThoughtSignature: firstPathValue(object, response.ToolCallSignaturePaths...),
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}
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if strings.TrimSpace(call.Name) != "" {
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if strings.TrimSpace(call.ID) == "" {
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call.ID = syntheticAgentToolCallID(body, index)
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}
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result.ToolCalls = append(result.ToolCalls, call)
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}
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}
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return result, nil
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}
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func syntheticAgentToolCallID(body []byte, index int) string {
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sum := sha256.Sum256([]byte(fmt.Sprintf("%s#%d", body, index)))
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return fmt.Sprintf("call_%x", sum[:8])
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}
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func (a manifestAdapter) ParseCreate(_ context.Context, body []byte) (CreateResult, error) {
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if a.manifest.Response.BinaryPayload {
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return binaryPayloadCreateResult(a.manifest.Response.ResultKind, body)
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}
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payload, err := decodeObject(body)
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if err != nil {
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return CreateResult{}, err
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}
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return a.parse(payload, PollContext{}), nil
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}
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// binaryPayloadCreateResult 把同步二进制响应包装为单个媒体结果。MIME 以响应内容探测为准，
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// 空响应必须失败，不能把空内容伪装成生成成功。
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func binaryPayloadCreateResult(resultKind string, body []byte) (CreateResult, error) {
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if len(body) == 0 {
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return CreateResult{}, fmt.Errorf("binary payload response is empty")
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}
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mimeType := strings.ToLower(strings.TrimSpace(strings.Split(http.DetectContentType(body), ";")[0]))
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reference := MediaReference{DataURL: "data:" + mimeType + ";base64," + base64.StdEncoding.EncodeToString(body), MIMEType: mimeType}
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result := &Result{}
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switch resultKind {
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case "audio":
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result.Audios = []MediaReference{reference}
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case "image":
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result.Images = []MediaReference{reference}
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case "video":
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result.Videos = []MediaReference{reference}
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default:
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return CreateResult{}, fmt.Errorf("binary payload response requires resultKind image, video or audio, got %q", resultKind)
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}
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return CreateResult{Status: StatusSucceeded, Result: result}, nil
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}
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func (a manifestAdapter) BuildPoll(_ context.Context, c PollContext) (RequestSpec, error) {
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if a.manifest.Poll == nil {
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return RequestSpec{}, fmt.Errorf("protocol %s has no poll operation", a.manifest.Metadata.ID)
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}
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request := c.Request
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request.Model = c.Model
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return buildManifestOperation(*a.manifest.Poll, a.manifest.Auth, request, c.TaskID)
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}
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func (a manifestAdapter) ParsePoll(_ context.Context, c PollContext, body []byte) (PollResult, error) {
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payload, err := decodeObject(body)
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if err != nil {
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return PollResult{}, err
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}
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result := a.parse(payload, c)
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return PollResult{TaskID: result.TaskID, Status: result.Status, Result: result.Result, Message: result.Message}, nil
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}
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func (a manifestAdapter) BuildCancel(_ context.Context, c PollContext) (RequestSpec, error) {
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if a.manifest.Cancel == nil {
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return RequestSpec{}, fmt.Errorf("protocol %s does not support cancellation", a.manifest.Metadata.ID)
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}
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request := c.Request
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request.Model = c.Model
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return buildManifestOperation(*a.manifest.Cancel, a.manifest.Auth, request, c.TaskID)
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}
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func (a manifestAdapter) BuildResult(_ context.Context, c PollContext) (RequestSpec, error) {
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if a.manifest.ResultOperation == nil {
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return RequestSpec{}, fmt.Errorf("protocol %s has no result operation", a.manifest.Metadata.ID)
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}
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request := c.Request
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request.Model = c.Model
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return buildManifestOperation(*a.manifest.ResultOperation, a.manifest.Auth, request, c.TaskID)
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}
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func (a manifestAdapter) parse(payload map[string]any, c PollContext) CreateResult {
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response := a.manifest.Response
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env := map[string]any{"response": payload, "taskId": c.TaskID, "request": manifestRequestValues(c.Request)}
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id := manifestResponseString(response.TaskID, env)
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if id == "" {
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id = firstPathValue(payload, response.TaskIDPaths...)
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}
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if id == "" {
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id = c.TaskID
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}
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statusText := manifestResponseString(response.Status, env)
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if statusText == "" {
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statusText = firstPathValue(payload, response.StatusPaths...)
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}
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status := normalizeStatus(statusText)
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if status == "" {
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status = StatusPending
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}
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message := manifestResponseString(response.Message, env)
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if message == "" {
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message = firstPathValue(payload, response.MessagePaths...)
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}
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if manifestError(payload, response.ErrorPaths...) {
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status = StatusFailed
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}
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result := &Result{
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Text: manifestResponseString(response.Text, env),
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Reasoning: manifestResponseString(response.Reasoning, env),
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}
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if result.Text == "" {
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result.Text = firstPathValue(payload, response.TextPaths...)
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}
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if result.Reasoning == "" {
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result.Reasoning = firstPathValue(payload, response.ReasoningPaths...)
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}
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result.Images = manifestResponseMedia(response.Images, env, "image", response.ResultEphemeral)
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result.Videos = manifestResponseMedia(response.Videos, env, "video", response.ResultEphemeral)
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result.Audios = manifestResponseMedia(response.Audios, env, "audio", response.ResultEphemeral)
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if response.Usage != nil {
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if value, err := evaluateManifestValue(response.Usage, env); err == nil {
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result.Usage = manifestObject(value)
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}
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}
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paths := append([]string{}, a.manifest.Response.ResultURLPaths...)
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paths = append(paths, a.manifest.Response.ResultPaths...)
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for _, path := range paths {
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for _, value := range mediaPathValues(payload, path) {
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item := MediaReference{URL: value, Kind: a.manifest.Response.ResultKind, Ephemeral: a.manifest.Response.ResultEphemeral}
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switch a.manifest.Response.ResultKind {
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case "image":
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result.Images = append(result.Images, item)
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case "audio":
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result.Audios = append(result.Audios, item)
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default:
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result.Videos = append(result.Videos, item)
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}
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}
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}
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if status == StatusPending && (result.Text != "" || len(result.Images) > 0 || len(result.Videos) > 0 || len(result.Audios) > 0) {
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status = StatusSucceeded
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}
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if result.Text == "" && result.Reasoning == "" && len(result.Images) == 0 && len(result.Videos) == 0 && len(result.Audios) == 0 {
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result = nil
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}
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return CreateResult{TaskID: id, Status: status, Result: result, Message: message}
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}
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func validateManifestRequest(rules []ManifestValidation, request GenerationRequest) error {
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if len(rules) == 0 {
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return nil
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}
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env := map[string]any{"request": manifestRequestValues(request)}
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for _, rule := range rules {
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value, err := evaluateManifestValue(rule.Assert, env)
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if err != nil {
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return fmt.Errorf("协议参数校验表达式错误：%w", err)
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}
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if !manifestTruthy(value) {
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return fmt.Errorf("%s", strings.TrimSpace(rule.Message))
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}
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}
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return nil
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}
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func manifestResponseString(template any, env map[string]any) string {
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if template == nil {
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return ""
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}
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value, err := evaluateManifestValue(template, env)
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if err != nil {
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return ""
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}
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items := manifestArray(value)
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parts := make([]string, 0, len(items))
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for _, item := range items {
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if text := strings.TrimSpace(manifestString(item)); text != "" {
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parts = append(parts, text)
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}
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}
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return strings.Join(parts, "")
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}
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func manifestResponseMedia(template any, env map[string]any, kind string, ephemeral bool) []MediaReference {
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if template == nil {
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return nil
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}
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value, err := evaluateManifestValue(template, env)
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if err != nil {
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return nil
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}
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return mediaReferencesFromManifestValue(value, kind, ephemeral)
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}
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func mediaReferencesFromManifestValue(value any, kind string, ephemeral bool) []MediaReference {
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result := make([]MediaReference, 0)
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for _, item := range manifestArray(value) {
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switch typed := item.(type) {
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case string:
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trimmed := strings.TrimSpace(typed)
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if trimmed == "" {
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continue
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}
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reference := MediaReference{Kind: kind, Ephemeral: ephemeral}
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if strings.HasPrefix(trimmed, "data:") {
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reference.DataURL = trimmed
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} else {
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reference.URL = trimmed
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}
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result = append(result, reference)
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case map[string]any:
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reference := MediaReference{
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ID: manifestString(typed["id"]), URL: manifestString(typed["url"]), DataURL: manifestString(typed["dataUrl"]),
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Kind: defaultValue(manifestString(typed["kind"]), kind), Role: manifestString(typed["role"]), MIMEType: manifestString(typed["mimeType"]),
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Name: manifestString(typed["name"]), Order: manifestInt(typed["order"]), Weight: manifestFloat(typed["weight"]), Ephemeral: ephemeral || manifestTruthy(typed["ephemeral"]),
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}
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if reference.URL == "" {
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reference.URL = firstString(typed, "file_url", "fileUrl", "image_url", "imageUrl", "video_url", "videoUrl", "audio_url", "audioUrl", "uri")
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}
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if reference.DataURL == "" {
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reference.DataURL = firstString(typed, "data_url", "b64_json")
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}
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// OpenAI / Ark 等渠道常直接返回裸 b64_json；声明式结果下载要求 data URL。
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reference.DataURL = normalizeManifestInlineDataURL(reference.DataURL, reference.Kind, firstString(typed, "output_format", "mime_type", "mimeType"))
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if reference.URL != "" || reference.DataURL != "" {
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result = append(result, reference)
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}
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}
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}
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return result
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}
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func normalizeManifestInlineDataURL(value, kind, formatHint string) string {
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value = strings.TrimSpace(value)
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if value == "" || strings.HasPrefix(value, "data:") {
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return value
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}
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return "data:" + manifestInlineMediaMIME(kind, formatHint) + ";base64," + value
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}
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func manifestInlineMediaMIME(kind, formatHint string) string {
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hint := strings.ToLower(strings.TrimSpace(formatHint))
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switch hint {
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case "image/png", "image/jpeg", "image/webp", "image/gif", "audio/mpeg", "audio/wav", "audio/ogg", "video/mp4", "video/webm":
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return hint
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case "image/jpg":
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return "image/jpeg"
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case "audio/mp3":
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return "audio/mpeg"
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case "png":
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return "image/png"
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case "jpeg", "jpg":
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return "image/jpeg"
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case "webp":
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return "image/webp"
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case "gif":
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return "image/gif"
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case "mp3", "mpeg":
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return "audio/mpeg"
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case "wav":
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return "audio/wav"
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case "mp4":
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return "video/mp4"
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case "webm":
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return "video/webm"
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}
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switch strings.ToLower(strings.TrimSpace(kind)) {
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case "audio":
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return "audio/mpeg"
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case "video":
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return "video/mp4"
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default:
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return "image/png"
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}
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}
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var (
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manifestMDImageRegex = regexp.MustCompile(`!\[[^\]]*\]\(([^)\s]+)\)`)
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manifestHTMLVideoRegex = regexp.MustCompile(`(?i)<video[^>]+src=['"]([^'"]+)['"]`)
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)
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func mediaPathValues(payload map[string]any, path string) []string {
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value := pathValue(payload, path)
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if text, ok := value.(string); ok && strings.TrimSpace(text) != "" {
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trimmed := strings.TrimSpace(text)
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if matches := manifestMDImageRegex.FindAllStringSubmatch(trimmed, -1); len(matches) > 0 {
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var res []string
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for _, m := range matches {
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if len(m) > 1 && m[1] != "" {
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res = append(res, m[1])
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}
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}
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if len(res) > 0 {
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return res
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}
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}
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if matches := manifestHTMLVideoRegex.FindAllStringSubmatch(trimmed, -1); len(matches) > 0 {
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var res []string
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for _, m := range matches {
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if len(m) > 1 && m[1] != "" {
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res = append(res, m[1])
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}
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}
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if len(res) > 0 {
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return res
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}
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}
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return []string{trimmed}
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}
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items, ok := value.([]any)
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if !ok {
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return nil
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}
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values := make([]string, 0, len(items))
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for _, item := range items {
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switch typed := item.(type) {
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case string:
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if strings.TrimSpace(typed) != "" {
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values = append(values, strings.TrimSpace(typed))
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}
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case map[string]any:
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if url := firstString(typed, "url", "file_url", "fileUrl", "video_url", "videoUrl", "image_url", "imageUrl"); url != "" {
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values = append(values, url)
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}
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}
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}
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return values
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}
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