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feat(backend): support koemotion (#10)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| package backend | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "encoding/json" | ||
| "log/slog" | ||
| "net/http" | ||
| "strings" | ||
|
|
||
| "github.com/labstack/echo/v4" | ||
| "github.com/moeru-ai/unspeech/pkg/apierrors" | ||
| "github.com/moeru-ai/unspeech/pkg/utils" | ||
| "github.com/moeru-ai/unspeech/pkg/utils/jsonpatch" | ||
| "github.com/samber/mo" | ||
| "github.com/vincent-petithory/dataurl" | ||
| ) | ||
|
|
||
| func koemotion(c echo.Context, options mo.Option[SpeechRequestOptions]) mo.Result[any] { | ||
| patchedPayload := jsonpatch.ApplyPatches( | ||
| options.MustGet().body.OrElse(new(bytes.Buffer)).Bytes(), | ||
| mo.Some(jsonpatch.ApplyOptions{AllowMissingPathOnRemove: true}), | ||
| jsonpatch.NewRemove("/model"), | ||
| jsonpatch.NewRemove("/voice"), | ||
| jsonpatch.NewRemove("/input"), | ||
| jsonpatch.NewAdd("/text", options.MustGet().Input), | ||
| ) | ||
| if patchedPayload.IsError() { | ||
| return mo.Err[any](apierrors.NewErrInternal().WithDetail(patchedPayload.Error().Error()).WithCaller()) | ||
| } | ||
|
|
||
| req, err := http.NewRequestWithContext( | ||
| c.Request().Context(), | ||
| http.MethodPost, | ||
| "https://api.rinna.co.jp/koemotion/infer", | ||
| bytes.NewBuffer(patchedPayload.MustGet()), | ||
| ) | ||
| if err != nil { | ||
| return mo.Err[any](apierrors.NewErrInternal().WithCaller()) | ||
| } | ||
|
|
||
| // Rewrite the Authorization header | ||
| req.Header.Set("Ocp-Apim-Subscription-Key", strings.TrimPrefix( | ||
| c.Request().Header.Get("Authorization"), | ||
| "Bearer ", | ||
| )) | ||
| req.Header.Set("Content-Type", "application/json") | ||
|
|
||
| res, err := http.DefaultClient.Do(req) | ||
| if err != nil { | ||
| return mo.Err[any](apierrors.NewErrBadGateway().WithDetail(err.Error()).WithError(err).WithCaller()) | ||
| } | ||
|
|
||
| defer func() { _ = res.Body.Close() }() | ||
|
|
||
| if res.StatusCode >= 400 && res.StatusCode < 600 { | ||
| switch { | ||
| case strings.HasPrefix(res.Header.Get("Content-Type"), "application/json"): | ||
| return mo.Err[any](apierrors. | ||
| NewUpstreamError(res.StatusCode). | ||
| WithDetail(NewJSONResponseError(res.StatusCode, res.Body).OrEmpty().Error())) | ||
| case strings.HasPrefix(res.Header.Get("Content-Type"), "text/"): | ||
| return mo.Err[any](apierrors. | ||
| NewUpstreamError(res.StatusCode). | ||
| WithDetail(NewTextResponseError(res.StatusCode, res.Body).OrEmpty().Error())) | ||
| default: | ||
| slog.Warn("unknown upstream error with unknown Content-Type", | ||
| slog.Int("status", res.StatusCode), | ||
| slog.String("content-type", res.Header.Get("Content-Type")), | ||
| slog.String("content-length", res.Header.Get("Content-Length")), | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| var resBody map[string]any | ||
|
|
||
| err = json.NewDecoder(res.Body).Decode(&resBody) | ||
| if err != nil { | ||
| return mo.Err[any](apierrors.NewErrInternal().WithDetail(err.Error()).WithError(err).WithCaller()) | ||
| } | ||
|
|
||
| audioDataURLString := utils.GetByJSONPath[string](resBody, "{ .audio }") | ||
| if audioDataURLString == "" { | ||
| return mo.Err[any](apierrors.NewErrInternal().WithDetail("upstream returned empty audio data URL").WithCaller()) | ||
| } | ||
|
|
||
| audioDataURL, err := dataurl.DecodeString(audioDataURLString) | ||
| if err != nil { | ||
| return mo.Err[any](apierrors.NewErrInternal().WithDetail(err.Error()).WithError(err).WithCaller()) | ||
| } | ||
|
|
||
| return mo.Ok[any](c.Blob(http.StatusOK, "audio/mp3", audioDataURL.Data)) | ||
| } |
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