🚧 Optimize

internal/common/translator/google_translator_free.go

@@ -0,0 +1,103 @@
+package translator
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"golang.org/x/text/language"
+	"io"
+	"net/http"
+	"net/url"
+	"time"
+)
+
+// NewGoogleTranslatorTokenFree 创建一个新的无token的Google翻译器实例
+func NewGoogleTranslatorTokenFree() *GoogleTranslatorTokenFree {
+	return &GoogleTranslatorTokenFree{
+		httpClient: &http.Client{Timeout: defaultTimeout},
+		Timeout:    defaultTimeout,
+		languages:  initGoogleLanguages(),
+	}
+}
+
+// SetTimeout 设置请求超时时间
+func (t *GoogleTranslatorTokenFree) SetTimeout(timeout time.Duration) {
+	t.Timeout = timeout
+	t.httpClient.Timeout = timeout
+}
+
+// Translate 使用Go语言提供的标准语言标签进行文本翻译
+func (t *GoogleTranslatorTokenFree) Translate(text string, from language.Tag, to language.Tag) (string, error) {
+	return t.translate(text, from.String(), to.String())
+}
+
+// TranslateWithParams 使用简单字符串参数进行文本翻译
+func (t *GoogleTranslatorTokenFree) TranslateWithParams(text string, params TranslationParams) (string, error) {
+	if params.Timeout > 0 {
+		t.SetTimeout(params.Timeout)
+	}
+	return t.translate(text, params.From, params.To)
+}
+
+// translate 执行实际翻译操作（无token版本）
+func (t *GoogleTranslatorTokenFree) translate(text, from, to string) (string, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), t.Timeout)
+	defer cancel()
+
+	// 构建请求URL（无token版本）
+	apiURL := "https://translate.googleapis.com/translate_a/t"
+	params := url.Values{}
+	params.Set("client", "dict-chrome-ex")
+	params.Set("sl", from)
+	params.Set("tl", to)
+	params.Set("q", text)
+
+	fullURL := apiURL + "?" + params.Encode()
+
+	// 创建请求
+	req, err := http.NewRequestWithContext(ctx, "GET", fullURL, nil)
+	if err != nil {
+		return "", err
+	}
+
+	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+
+	// 发送请求
+	resp, err := t.httpClient.Do(req)
+	if err != nil {
+		return "", ErrBadNetwork
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("API error: status code %d", resp.StatusCode)
+	}
+
+	// 读取响应
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return "", err
+	}
+
+	// 解析JSON响应
+	var result []interface{}
+	if err := json.Unmarshal(body, &result); err != nil {
+		return "", err
+	}
+
+	// 提取翻译文本
+	var translatedTexts []string
+	visitArrayItems(result, func(obj interface{}) {
+		if text, ok := obj.(string); ok {
+			translatedTexts = append(translatedTexts, text)
+		}
+	})
+
+	if len(translatedTexts) == 0 {
+		return "", errors.New("no translation found")
+	}
+
+	// 返回第一个翻译结果
+	return translatedTexts[0], nil
+}