Add ai search plugin (#1804)

plugins/wasm-go/extensions/ai-search/engine/bing/bing.go

@@ -0,0 +1,128 @@
+package bing
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+	"net/url"
+	"strings"
+
+	"github.com/alibaba/higress/plugins/wasm-go/pkg/wrapper"
+	"github.com/tidwall/gjson"
+
+	"github.com/alibaba/higress/plugins/wasm-go/extensions/ai-search/engine"
+)
+
+type BingSearch struct {
+	optionArgs         map[string]string
+	apiKey             string
+	start              int
+	count              int
+	timeoutMillisecond uint32
+	client             wrapper.HttpClient
+}
+
+func NewBingSearch(config *gjson.Result) (*BingSearch, error) {
+	engine := &BingSearch{}
+	engine.apiKey = config.Get("apiKey").String()
+	if engine.apiKey == "" {
+		return nil, errors.New("apiKey not found")
+	}
+	serviceName := config.Get("serviceName").String()
+	if serviceName == "" {
+		return nil, errors.New("serviceName not found")
+	}
+	servicePort := config.Get("servicePort").Int()
+	if servicePort == 0 {
+		return nil, errors.New("servicePort not found")
+	}
+	engine.client = wrapper.NewClusterClient(wrapper.FQDNCluster{
+		FQDN: serviceName,
+		Port: servicePort,
+	})
+	engine.start = int(config.Get("start").Uint())
+	engine.count = int(config.Get("count").Uint())
+	if engine.count == 0 {
+		engine.count = 10
+	}
+	engine.timeoutMillisecond = uint32(config.Get("timeoutMillisecond").Uint())
+	if engine.timeoutMillisecond == 0 {
+		engine.timeoutMillisecond = 5000
+	}
+	engine.optionArgs = map[string]string{}
+	for key, value := range config.Get("optionArgs").Map() {
+		valStr := value.String()
+		if valStr != "" {
+			engine.optionArgs[key] = value.String()
+		}
+	}
+	return engine, nil
+}
+
+func (b BingSearch) NeedExectue(ctx engine.SearchContext) bool {
+	return ctx.EngineType == "internet"
+}
+
+func (b BingSearch) Client() wrapper.HttpClient {
+	return b.client
+}
+
+func (b BingSearch) CallArgs(ctx engine.SearchContext) engine.CallArgs {
+	queryUrl := fmt.Sprintf("https://api.bing.microsoft.com/v7.0/search?q=%s&count=%d&offset=%d",
+		url.QueryEscape(strings.Join(ctx.Querys, " ")), b.count, b.start)
+	var extraArgs []string
+	for key, value := range b.optionArgs {
+		extraArgs = append(extraArgs, fmt.Sprintf("%s=%s", key, url.QueryEscape(value)))
+	}
+	if ctx.Language != "" {
+		extraArgs = append(extraArgs, fmt.Sprintf("mkt=%s", ctx.Language))
+	}
+	if len(extraArgs) > 0 {
+		queryUrl = fmt.Sprintf("%s&%s", queryUrl, strings.Join(extraArgs, "&"))
+	}
+	return engine.CallArgs{
+		Method:             http.MethodGet,
+		Url:                queryUrl,
+		Headers:            [][2]string{{"Ocp-Apim-Subscription-Key", b.apiKey}},
+		TimeoutMillisecond: b.timeoutMillisecond,
+	}
+}
+
+func (b BingSearch) ParseResult(ctx engine.SearchContext, response []byte) []engine.SearchResult {
+	jsonObj := gjson.ParseBytes(response)
+	var results []engine.SearchResult
+	webPages := jsonObj.Get("webPages.value")
+	for _, page := range webPages.Array() {
+		result := engine.SearchResult{
+			Title:   page.Get("name").String(),
+			Link:    page.Get("url").String(),
+			Content: page.Get("snippet").String(),
+		}
+		if result.Valid() {
+			results = append(results, result)
+		}
+		deepLinks := page.Get("deepLinks")
+		for _, inner := range deepLinks.Array() {
+			innerResult := engine.SearchResult{
+				Title:   inner.Get("name").String(),
+				Link:    inner.Get("url").String(),
+				Content: inner.Get("snippet").String(),
+			}
+			if innerResult.Valid() {
+				results = append(results, innerResult)
+			}
+		}
+	}
+	news := jsonObj.Get("news.value")
+	for _, article := range news.Array() {
+		result := engine.SearchResult{
+			Title:   article.Get("name").String(),
+			Link:    article.Get("url").String(),
+			Content: article.Get("description").String(),
+		}
+		if result.Valid() {
+			results = append(results, result)
+		}
+	}
+	return results
+}