feat(reranker): 支持dashcope api进行reranker

Author: haoqi

components/document/transformer/reranker/dashscope/README.md

@@ -0,0 +1,17 @@
+# DashScope Reranker
+
+## 功能介绍
+
+DashScope Reranker 是 Eino 框架的一个文档重排序组件，基于阿里云 DashScope 平台提供的文本重排序 API 实现。该组件可以对一组文档按照与查询的相关性进行重排序，提高检索结果的准确性和相关性。
+
+## 注意事项
+
+1. 使用前需要在阿里云 DashScope 平台获取 API 密钥。
+2. 请参考 [DashScope 文本重排序 API 文档](https://help.aliyun.com/zh/model-studio/text-rerank-api?spm=a2c4g.11186623.help-menu-2400256.d_2_11_0.77857bbdIe6pFI) 了解支持的模型和参数详情。
+3. 不同模型可能支持的参数和功能有所差异，请根据实际使用的模型调整参数配置。
+4. API 调用可能产生费用，请参考 DashScope 平台的计费标准。
+
+## 引用
+
+- [阿里云 DashScope 文本重排序 API 文档](https://help.aliyun.com/zh/model-studio/text-rerank-api?spm=a2c4g.11186623.help-menu-2400256.d_2_11_0.77857bbdIe6pFI)
+        

components/document/transformer/reranker/dashscope/go.mod

@@ -0,0 +1,45 @@
+module github.com/cloudwego/eino-ext/components/document/transformer/reranker/dashscope
+
+go 1.23.0
+
+require (
+	github.com/bytedance/sonic v1.14.2
+	github.com/cloudwego/eino v0.5.12
+	github.com/cloudwego/eino-ext/components/tool/httprequest v0.0.0-20251111090228-91a10bbc864f
+)
+
+require (
+	github.com/bahlo/generic-list-go v0.2.0 // indirect
+	github.com/buger/jsonparser v1.1.1 // indirect
+	github.com/bytedance/gopkg v0.1.3 // indirect
+	github.com/bytedance/sonic/loader v0.4.0 // indirect
+	github.com/cloudwego/base64x v0.1.6 // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/eino-contrib/jsonschema v1.0.2 // indirect
+	github.com/getkin/kin-openapi v0.118.0 // indirect
+	github.com/go-openapi/jsonpointer v0.19.5 // indirect
+	github.com/go-openapi/swag v0.19.5 // indirect
+	github.com/goph/emperror v0.17.2 // indirect
+	github.com/invopop/yaml v0.1.0 // indirect
+	github.com/josharian/intern v1.0.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.9 // indirect
+	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826 // indirect
+	github.com/nikolalohinski/gonja v1.5.3 // indirect
+	github.com/pelletier/go-toml/v2 v2.0.9 // indirect
+	github.com/perimeterx/marshmallow v1.1.4 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/sirupsen/logrus v1.9.3 // indirect
+	github.com/slongfield/pyfmt v0.0.0-20220222012616-ea85ff4c361f // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/wk8/go-ordered-map/v2 v2.1.8 // indirect
+	github.com/yargevad/filepathx v1.0.0 // indirect
+	golang.org/x/arch v0.11.0 // indirect
+	golang.org/x/exp v0.0.0-20230713183714-613f0c0eb8a1 // indirect
+	golang.org/x/sys v0.33.0 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

components/document/transformer/reranker/dashscope/go.sum

@@ -0,0 +1,166 @@
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components/document/transformer/reranker/dashscope/option.go

@@ -0,0 +1,27 @@
+package dashscope
+
+import einoDocument "github.com/cloudwego/eino/components/document"
+
+type TransformerOptions struct {
+	Query    string // 查询文本
+	TopN     *uint8 // 排序返回的文档数量
+	Instruct string // 添加自定义排序任务类型说明，部分模型生效，以dashscope文档为准。建议使用英文撰写。
+}
+
+// WithQuery query参数
+func WithQuery(query string) einoDocument.TransformerOption {
+	return einoDocument.WrapTransformerImplSpecificOptFn(func(o *TransformerOptions) {
+		o.Query = query
+	})
+}
+
+// WithTopN 设置排序返回的文档数量，如果指定的top_n值大于输入的候选document数量，返回全部候选文档。如果指定的top_n值小于输入的候选document数量，会丢弃一部分文档
+func WithTopN(topN uint8) einoDocument.TransformerOption {
+	return einoDocument.WrapTransformerImplSpecificOptFn(func(o *TransformerOptions) {
+		o.TopN = &topN
+	})
+}
+
+func WithInstruct(instruct string) einoDocument.TransformerOption {
+	return einoDocument.WrapTransformerImplSpecificOptFn(func(o *TransformerOptions) {})
+}