feat: manually mirror opencoze's code from bytedance

Change-Id: I09a73aadda978ad9511264a756b2ce51f5761adf

backend/infra/impl/embedding/http/http.go

@@ -0,0 +1,158 @@
+/*
+ * Copyright 2025 coze-dev Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package http
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"io"
+	"net/http"
+	"strconv"
+	"time"
+
+	opt "github.com/cloudwego/eino/components/embedding"
+
+	"github.com/coze-dev/coze-studio/backend/infra/contract/embedding"
+)
+
+const (
+	pathDim   = "/dimension"
+	pathEmbed = "/embedding"
+)
+
+type embedReq struct {
+	Texts      []string `json:"texts"`
+	NeedSparse bool     `json:"need_sparse"`
+}
+
+type embedResp struct {
+	Dense  [][]float64       `json:"dense"`
+	Sparse []map[int]float64 `json:"sparse"`
+}
+
+func NewEmbedding(addr string) (embedding.Embedder, error) {
+	cli := &http.Client{Timeout: time.Second * 30}
+	req, err := http.NewRequest(http.MethodGet, addr+pathDim, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	resp, err := cli.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	b, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	dim, err := strconv.ParseInt(string(b), 10, 64)
+	if err != nil {
+		return nil, err
+	}
+
+	return &embedder{
+		cli:  cli,
+		addr: addr,
+		dim:  dim,
+	}, nil
+}
+
+type embedder struct {
+	cli  *http.Client
+	addr string
+	dim  int64
+}
+
+func (e *embedder) EmbedStrings(ctx context.Context, texts []string, opts ...opt.Option) ([][]float64, error) {
+	rb, err := json.Marshal(&embedReq{
+		Texts:      texts,
+		NeedSparse: false,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, e.addr+pathEmbed, bytes.NewReader(rb))
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", "application/json; charset=utf-8")
+
+	resp, err := e.cli.Do(req)
+	if err != nil {
+		return nil, err
+	}
+
+	defer resp.Body.Close()
+	b, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	r := &embedResp{}
+	if err = json.Unmarshal(b, r); err != nil {
+		return nil, err
+	}
+
+	return r.Dense, nil
+}
+
+func (e *embedder) EmbedStringsHybrid(ctx context.Context, texts []string, opts ...opt.Option) ([][]float64, []map[int]float64, error) {
+	rb, err := json.Marshal(&embedReq{
+		Texts:      texts,
+		NeedSparse: true,
+	})
+	if err != nil {
+		return nil, nil, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, e.addr+pathEmbed, bytes.NewReader(rb))
+	if err != nil {
+		return nil, nil, err
+	}
+	req.Header.Set("Content-Type", "application/json; charset=utf-8")
+
+	resp, err := e.cli.Do(req)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	defer resp.Body.Close()
+	b, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	r := &embedResp{}
+	if err = json.Unmarshal(b, r); err != nil {
+		return nil, nil, err
+	}
+
+	return r.Dense, r.Sparse, nil
+
+}
+
+func (e *embedder) Dimensions() int64 {
+	return e.dim
+}
+
+func (e *embedder) SupportStatus() embedding.SupportStatus {
+	return embedding.SupportDenseAndSparse
+}

backend/infra/impl/embedding/http/http_test.go

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2025 coze-dev Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package http
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestHTTPEmbedding(t *testing.T) {
+	if os.Getenv("TEST_HTTP_EMBEDDING") != "true" {
+		return
+	}
+
+	ctx := context.Background()
+	emb, err := NewEmbedding("http://127.0.0.1:6543")
+	assert.NoError(t, err)
+	texts := []string{
+		"hello",
+		"Eiffel Tower: Located in Paris, France, it is one of the most famous landmarks in the world.",
+	}
+
+	dense, err := emb.EmbedStrings(ctx, texts)
+	assert.NoError(t, err)
+	fmt.Println(dense)
+
+	dense, sparse, err := emb.EmbedStringsHybrid(ctx, texts)
+	assert.NoError(t, err)
+	fmt.Println(dense, sparse)
+}