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