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feat(file): unify file handling with a new FileSource abstraction for URL and base64 data

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CaIon
2026-02-04 17:15:24 +08:00
parent 89b2782675
commit 9ef7740fe7
28 changed files with 1119 additions and 357 deletions
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66
relay/channel/gemini/relay-gemini.go
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@@ -540,64 +540,58 @@ func CovertOpenAI2Gemini(c *gin.Context, textRequest dto.GeneralOpenAIRequest, i
if constant.GeminiVisionMaxImageNum != -1 && imageNum > constant.GeminiVisionMaxImageNum {
return nil, fmt.Errorf("too many images in the message, max allowed is %d", constant.GeminiVisionMaxImageNum)
}
// 判断是否是url
if strings.HasPrefix(part.GetImageMedia().Url, "http") {
// 是url，获取文件的类型和base64编码的数据
fileData, err := service.GetFileBase64FromUrl(c, part.GetImageMedia().Url, "formatting image for Gemini")
if err != nil {
return nil, fmt.Errorf("get file base64 from url '%s' failed: %w", part.GetImageMedia().Url, err)
}
// 校验 MimeType 是否在 Gemini 支持的白名单中
if _, ok := geminiSupportedMimeTypes[strings.ToLower(fileData.MimeType)]; !ok {
url := part.GetImageMedia().Url
return nil, fmt.Errorf("mime type is not supported by Gemini: '%s', url: '%s', supported types are: %v", fileData.MimeType, url, getSupportedMimeTypesList())
}
parts = append(parts, dto.GeminiPart{
InlineData: &dto.GeminiInlineData{
MimeType: fileData.MimeType, // 使用原始的 MimeType，因为大小写可能对API有意义
Data: fileData.Base64Data,
},
})
// 使用统一的文件服务获取图片数据
var source *types.FileSource
imageUrl := part.GetImageMedia().Url
if strings.HasPrefix(imageUrl, "http") {
source = types.NewURLFileSource(imageUrl)
} else {
format, base64String, err := service.DecodeBase64FileData(part.GetImageMedia().Url)
if err != nil {
return nil, fmt.Errorf("decode base64 image data failed: %s", err.Error())
}
parts = append(parts, dto.GeminiPart{
InlineData: &dto.GeminiInlineData{
MimeType: format,
Data: base64String,
},
})
source = types.NewBase64FileSource(imageUrl, "")
}
base64Data, mimeType, err := service.GetBase64Data(c, source, "formatting image for Gemini")
if err != nil {
return nil, fmt.Errorf("get file data from '%s' failed: %w", source.GetIdentifier(), err)
}
// 校验 MimeType 是否在 Gemini 支持的白名单中
if _, ok := geminiSupportedMimeTypes[strings.ToLower(mimeType)]; !ok {
return nil, fmt.Errorf("mime type is not supported by Gemini: '%s', url: '%s', supported types are: %v", mimeType, source.GetIdentifier(), getSupportedMimeTypesList())
}
parts = append(parts, dto.GeminiPart{
InlineData: &dto.GeminiInlineData{
MimeType: mimeType,
Data: base64Data,
},
})
} else if part.Type == dto.ContentTypeFile {
if part.GetFile().FileId != "" {
return nil, fmt.Errorf("only base64 file is supported in gemini")
}
format, base64String, err := service.DecodeBase64FileData(part.GetFile().FileData)
fileSource := types.NewBase64FileSource(part.GetFile().FileData, "")
base64Data, mimeType, err := service.GetBase64Data(c, fileSource, "formatting file for Gemini")
if err != nil {
return nil, fmt.Errorf("decode base64 file data failed: %s", err.Error())
}
parts = append(parts, dto.GeminiPart{
InlineData: &dto.GeminiInlineData{
MimeType: format,
Data: base64String,
MimeType: mimeType,
Data: base64Data,
},
})
} else if part.Type == dto.ContentTypeInputAudio {
if part.GetInputAudio().Data == "" {
return nil, fmt.Errorf("only base64 audio is supported in gemini")
}
base64String, err := service.DecodeBase64AudioData(part.GetInputAudio().Data)
audioSource := types.NewBase64FileSource(part.GetInputAudio().Data, "audio/"+part.GetInputAudio().Format)
base64Data, mimeType, err := service.GetBase64Data(c, audioSource, "formatting audio for Gemini")
if err != nil {
return nil, fmt.Errorf("decode base64 audio data failed: %s", err.Error())
}
parts = append(parts, dto.GeminiPart{
InlineData: &dto.GeminiInlineData{
MimeType: "audio/" + part.GetInputAudio().Format,
Data: base64String,
MimeType: mimeType,
Data: base64Data,
},
})
}