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sdapi.go
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sdapi.go
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package main
import (
"bytes"
"context"
"encoding/base64"
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"time"
)
const sdAPIURL = "http://localhost:7860/sdapi/v1/"
type sdAPIType struct{}
func (a *sdAPIType) req(ctx context.Context, path, service string, postData []byte) (string, error) {
path, err := url.JoinPath(sdAPIURL, path)
if err != nil {
return "", err
}
path += service
var request *http.Request
if postData != nil {
request, err = http.NewRequestWithContext(ctx, "POST", path, bytes.NewBuffer(postData))
if err != nil {
return "", err
}
request.Header.Set("Content-Type", "application/json; charset=UTF-8")
} else {
request, err = http.NewRequestWithContext(ctx, "GET", path, nil)
if err != nil {
return "", err
}
}
client := http.Client{}
resp, err := client.Do(request)
if err != nil {
return "", err
}
if resp.StatusCode != 200 {
return "", fmt.Errorf("api status code: %d", resp.StatusCode)
}
bodyBytes, err := io.ReadAll(resp.Body)
resp.Body.Close()
if err != nil {
return "", err
}
return string(bodyBytes), nil
}
type RenderReq struct {
EnableHR bool `json:"enable_hr"`
DenoisingStrength float32 `json:"denoising_strength"`
HRScale float32 `json:"hr_scale"`
HRUpscaler string `json:"hr_upscaler"`
HRSecondPassSteps int `json:"hr_second_pass_steps"`
HRSamplerName string `json:"hr_sampler_name"`
HRPrompt string `json:"hr_prompt"`
HRNegativePrompt string `json:"hr_negative_prompt"`
Prompt string `json:"prompt"`
Seed uint32 `json:"seed"`
SamplerName string `json:"sampler_name"`
BatchSize int `json:"batch_size"`
NIter int `json:"n_iter"`
Steps int `json:"steps"`
CFGScale float32 `json:"cfg_scale"`
Width int `json:"width"`
Height int `json:"height"`
NegativePrompt string `json:"negative_prompt"`
OverrideSettings map[string]interface{} `json:"override_settings"`
SendImages bool `json:"send_images"`
}
func (a *sdAPIType) Render(ctx context.Context, p ReqParams, imageData ImageFileData) (imgs [][]byte, err error) {
params := p.(ReqParamsRender)
postData, err := json.Marshal(RenderReq{
EnableHR: params.HR.Scale > 0,
DenoisingStrength: params.HR.DenoisingStrength,
HRScale: params.HR.Scale,
HRUpscaler: params.HR.Upscaler,
HRSecondPassSteps: params.HR.SecondPassSteps,
HRSamplerName: params.SamplerName,
HRPrompt: params.Prompt,
HRNegativePrompt: params.NegativePrompt,
Prompt: params.Prompt,
Seed: params.Seed,
SamplerName: params.SamplerName,
BatchSize: params.NumOutputs,
NIter: 1,
Steps: params.Steps,
CFGScale: params.CFGScale,
Width: params.Width,
Height: params.Height,
NegativePrompt: params.NegativePrompt,
OverrideSettings: map[string]interface{}{
"sd_model_checkpoint": params.ModelName,
},
SendImages: true,
})
if err != nil {
return nil, err
}
res, err := a.req(ctx, "/txt2img", "", postData)
if err != nil {
return nil, err
}
var renderResp struct {
Images []string `json:"images"`
}
err = json.Unmarshal([]byte(res), &renderResp)
if err != nil {
return nil, err
}
if len(renderResp.Images) == 0 {
return nil, fmt.Errorf("unknown error")
}
for _, img := range renderResp.Images {
var unbased []byte
if unbased, err = base64.StdEncoding.DecodeString(img); err != nil {
return nil, fmt.Errorf("image base64 decode error")
}
imgs = append(imgs, unbased)
}
return imgs, nil
}
type UpscaleReq struct {
ResizeMode int `json:"resize_mode,omitempty"`
ShowExtrasResults bool `json:"show_extras_results,omitempty"`
GFPGANVisibility float32 `json:"gfpgan_visibility,omitempty"`
CodeFormerVisibility float32 `json:"codeformer_visibility,omitempty"`
CodeFormerWeight float32 `json:"codeformer_weight,omitempty"`
UpscalingResize float32 `json:"upscaling_resize,omitempty"`
UpscalingResizeWidth int `json:"upscaling_resize_w,omitempty"`
UpscalingResizeHeight int `json:"upscaling_resize_h,omitempty"`
UpscalingResizeWidthHeightCrop bool `json:"upscaling_crop,omitempty"`
Upscaler1 string `json:"upscaler_1,omitempty"`
Upscaler2 string `json:"upscaler_2,omitempty"`
Upscaler2Visibility float32 `json:"extras_upscaler_2_visibility,omitempty"`
UpscaleFirst bool `json:"upscale_first,omitempty"`
Image string `json:"image"`
}
func (a *sdAPIType) Upscale(ctx context.Context, p ReqParams, imageData ImageFileData) (imgs [][]byte, err error) {
params := p.(ReqParamsUpscale)
postData, err := json.Marshal(UpscaleReq{
UpscalingResize: params.Scale,
Upscaler1: params.Upscaler,
Image: base64.StdEncoding.EncodeToString(imageData.data),
})
if err != nil {
return nil, err
}
res, err := a.req(ctx, "/extra-single-image", "", postData)
if err != nil {
return nil, err
}
var renderResp struct {
Image string `json:"image"`
}
err = json.Unmarshal([]byte(res), &renderResp)
if err != nil {
return nil, err
}
if len(renderResp.Image) == 0 {
return nil, fmt.Errorf("unknown error")
}
var unbased []byte
if unbased, err = base64.StdEncoding.DecodeString(renderResp.Image); err != nil {
return nil, fmt.Errorf("image base64 decode error")
}
return [][]byte{unbased}, nil
}
func (a *sdAPIType) Interrupt(ctx context.Context) error {
_, err := a.req(ctx, "/interrupt", "", []byte{})
if err != nil {
return err
}
return nil
}
func (a *sdAPIType) GetProgress(ctx context.Context) (progressPercent int, eta time.Duration, err error) {
res, err := a.req(ctx, "/progress", "?skip_current_image=false", nil)
if err != nil {
return 0, 0, err
}
var progressRes struct {
Progress float32 `json:"progress"`
ETA float32 `json:"eta_relative"`
Detail string `json:"detail"`
}
err = json.Unmarshal([]byte(res), &progressRes)
if err != nil {
return 0, 0, err
}
if progressRes.Detail != "" {
return 0, 0, fmt.Errorf(progressRes.Detail)
}
return int(progressRes.Progress * 100), time.Duration(progressRes.ETA * float32(time.Second)), nil
}
func (a *sdAPIType) GetModels(ctx context.Context) (models []string, err error) {
res, err := a.req(ctx, "/sd-models", "", nil)
if err != nil {
return nil, err
}
var modelsRes []struct {
Name string `json:"model_name"`
}
err = json.Unmarshal([]byte(res), &modelsRes)
if err != nil {
return nil, err
}
for _, m := range modelsRes {
models = append(models, m.Name)
}
return
}
func (a *sdAPIType) GetSamplers(ctx context.Context) (samplers []string, err error) {
res, err := a.req(ctx, "/samplers", "", nil)
if err != nil {
return nil, err
}
var samplersRes []struct {
Name string `json:"name"`
}
err = json.Unmarshal([]byte(res), &samplersRes)
if err != nil {
return nil, err
}
for _, sampler := range samplersRes {
samplers = append(samplers, sampler.Name)
}
return
}
func (a *sdAPIType) GetEmbeddings(ctx context.Context) (embs []string, err error) {
res, err := a.req(ctx, "/embeddings", "", nil)
if err != nil {
return nil, err
}
var embList struct {
Loaded map[string]struct{} `json:"loaded"`
}
err = json.Unmarshal([]byte(res), &embList)
if err != nil {
return nil, err
}
for i := range embList.Loaded {
embs = append(embs, i)
}
return
}
func (a *sdAPIType) GetLoRAs(ctx context.Context) (loras []string, err error) {
res, err := a.req(ctx, "/loras", "", nil)
if err != nil {
return nil, err
}
var lorasRes []struct {
Name string `json:"name"`
}
err = json.Unmarshal([]byte(res), &lorasRes)
if err != nil {
return nil, err
}
for _, lora := range lorasRes {
loras = append(loras, lora.Name)
}
return
}
func (a *sdAPIType) GetUpscalers(ctx context.Context) (upscalers []string, err error) {
res, err := a.req(ctx, "/upscalers", "", nil)
if err != nil {
return nil, err
}
var upscalersRes []struct {
Name string `json:"name"`
}
err = json.Unmarshal([]byte(res), &upscalersRes)
if err != nil {
return nil, err
}
for _, u := range upscalersRes {
upscalers = append(upscalers, u.Name)
}
return
}
func (a *sdAPIType) GetVAEs(ctx context.Context) (vaes []string, err error) {
res, err := a.req(ctx, "/sd-vae", "", nil)
if err != nil {
return nil, err
}
var vaesRes []struct {
Name string `json:"model_name"`
}
err = json.Unmarshal([]byte(res), &vaesRes)
if err != nil {
return nil, err
}
for _, u := range vaesRes {
vaes = append(vaes, u.Name)
}
return
}