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Valiadte middleware config when create/update bot, add /middlewares A…
…PI to get available middleware info
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,82 @@ | ||
| package middleware | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "net/url" | ||
|
|
||
| "github.com/pandodao/botastic/api" | ||
| "github.com/pandodao/botastic/models" | ||
| ) | ||
|
|
||
| type Fetch struct{} | ||
|
|
||
| func NewFetch() *Fetch { | ||
| return &Fetch{} | ||
| } | ||
|
|
||
| func (m *Fetch) Desc() *api.MiddlewareDesc { | ||
| return &api.MiddlewareDesc{ | ||
| Name: "fetch", | ||
| Desc: "fetch middleware will send a GET request to the specified URL and return the response body as string", | ||
| Options: []*api.MiddlewareDescOption{ | ||
| { | ||
| Name: "url", | ||
| Desc: "URL to fetch", | ||
| Required: true, | ||
| ParseValueFunc: func(v string) (any, error) { | ||
| _, err := url.Parse(v) | ||
| return v, err | ||
| }, | ||
| }, | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| func (m *Fetch) Parse(opts map[string]string) (map[string]*api.MiddlewareDescOption, error) { | ||
| result := map[string]*api.MiddlewareDescOption{} | ||
| desc := m.Desc() | ||
| for _, opt := range m.Desc().Options { | ||
| if opt.Required && opts[opt.Name] == "" { | ||
| return nil, fmt.Errorf("missing required option: %s, middleware: %s", opt.Name, desc.Name) | ||
| } | ||
|
|
||
| if opt.ParseValueFunc != nil { | ||
| v, err := opt.ParseValueFunc(opts[opt.Name]) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to parse option: %s, middleware: %s, err: %w", opt.Name, desc.Name, err) | ||
| } | ||
| opt.Value = v | ||
| } | ||
| result[opt.Name] = opt | ||
| } | ||
|
|
||
| return result, nil | ||
| } | ||
|
|
||
| func (m *Fetch) Process(ctx context.Context, opts map[string]*api.MiddlewareDescOption, turn *models.Turn) (string, error) { | ||
| u := opts["url"].Value.(string) | ||
| req, err := http.NewRequestWithContext(ctx, http.MethodGet, u, nil) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| resp, err := http.DefaultClient.Do(req) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| defer resp.Body.Close() | ||
|
|
||
| body, err := io.ReadAll(resp.Body) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| if resp.StatusCode/100 != 2 { | ||
| return "", fmt.Errorf("failed to fetch url: %s, status code: %d, body: %s", u, resp.StatusCode, string(body)) | ||
| } | ||
|
|
||
| return string(body), nil | ||
| } |
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