110 lines
2.9 KiB
Go
110 lines
2.9 KiB
Go
// Package matting 封装图片抠图服务调用，将衣物图片上传到 BiRefNet 抠图服务，
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// 返回透明底 PNG 图片字节。
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package matting
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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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"mime/multipart"
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"net/http"
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"time"
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"git.lzcwy.cn/zhengchiliu/zt-closet-backend/global"
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)
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const (
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mattingPath = "/matting"
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healthzPath = "/healthz"
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)
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// Client 抠图服务客户端。
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type Client struct {
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baseURL string
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httpClient *http.Client
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}
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// NewClient 从全局配置创建客户端。
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func NewClient() *Client {
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return NewClientWithAddr(global.MattingModelSetting.Host, global.MattingModelSetting.Port)
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}
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// NewClientWithAddr 使用指定 Host/Port 创建客户端，便于测试与解耦。
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func NewClientWithAddr(host string, port int) *Client {
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return &Client{
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baseURL: fmt.Sprintf("http://%s:%d", host, port),
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httpClient: &http.Client{
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Timeout: 120 * time.Second,
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},
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}
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}
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// Matting 调用抠图服务，将图片上传并返回透明底 PNG 字节。
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func (c *Client) Matting(ctx context.Context, imageData []byte) ([]byte, error) {
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var body bytes.Buffer
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writer := multipart.NewWriter(&body)
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part, err := writer.CreateFormFile("file", "image.png")
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if err != nil {
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return nil, fmt.Errorf("matting create form file: %w", err)
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}
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if _, err := part.Write(imageData); err != nil {
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return nil, fmt.Errorf("matting write image: %w", err)
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}
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if err := writer.Close(); err != nil {
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return nil, fmt.Errorf("matting close multipart: %w", err)
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}
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request, err := http.NewRequestWithContext(ctx, http.MethodPost, c.baseURL+mattingPath, &body)
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if err != nil {
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return nil, fmt.Errorf("matting create request: %w", err)
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}
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request.Header.Set("Content-Type", writer.FormDataContentType())
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response, err := c.httpClient.Do(request)
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if err != nil {
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return nil, fmt.Errorf("matting do request: %w", err)
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}
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defer response.Body.Close()
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data, err := io.ReadAll(response.Body)
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if err != nil {
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return nil, fmt.Errorf("matting read response: %w", err)
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}
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if response.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("matting api error: status=%d, body=%s", response.StatusCode, summarize(data))
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}
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return data, nil
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}
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// HealthCheck 检查抠图服务是否就绪。
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func (c *Client) HealthCheck(ctx context.Context) error {
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request, err := http.NewRequestWithContext(ctx, http.MethodGet, c.baseURL+healthzPath, nil)
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if err != nil {
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return fmt.Errorf("matting create healthz request: %w", err)
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}
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response, err := c.httpClient.Do(request)
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if err != nil {
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return fmt.Errorf("matting healthz request: %w", err)
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}
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defer response.Body.Close()
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if response.StatusCode != http.StatusOK {
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return fmt.Errorf("matting healthz status: %d", response.StatusCode)
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}
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return nil
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}
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// summarize 截断响应体摘要，避免错误信息打印大体积二进制。
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func summarize(data []byte) string {
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const maxLen = 512
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if len(data) > maxLen {
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return string(data[:maxLen]) + "..."
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}
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return string(data)
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}
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