chenxin
49d0a371fb
- 逆向 SpadeA(黑桃A) PlayAuth 混淆，从 spade_a 还原 AES-128 内容密钥
- 实现 cenc-aes-ctr MP4 解密（senc 逐样本 CTR + stsd entry 修复），实测可播放
- 新增 /video/proxy/{key} 代理：稳定 key + 磁盘缓存（二次命中提速 130x）+
http.ServeContent 支持 Range/206/seek 流式播放
- /video 接口新增 output(url/proxy，默认 proxy) 与 quality(max/720p/档位key) 参数，
可由 config fanqie.video.* 配置默认值；无匹配清晰度时明确报错
- 代理映射复用 audio_cache 存储，抽取 loadMediaProxyEntry 共用；挂接 7 天缓存清理
- deploy.sh 新增 --sync-nginx：备份→重写→校验→失败自动回滚，同步视频代理段配置
490 lines
15 KiB
Go
490 lines
15 KiB
Go
package fqapi
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import (
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"bytes"
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"encoding/base64"
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"encoding/json"
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"fanqie/internal/common"
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"fanqie/internal/config"
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"fmt"
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"io"
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"math"
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"os"
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"path/filepath"
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"strings"
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"time"
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)
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var videoLogger = common.NewLogger("video", "INFO", "")
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// HandleVideo 处理获取视频（支持批量和单个接口）。
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// output: url（默认，返回原始CDN链接，内容为 CENC 加密）/ proxy（返回本地解密代理链接，可直接播放）
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// quality: 清晰度过滤，支持 max（最高档，默认）、definition（360p/480p/...）或档位 key（video_1..N），空为全部；
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// 未传时回退 config fanqie.video.quality，output 为空时回退 fanqie.video.output_mode
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func HandleVideo(itemIDs, output, quality interface{}) (string, error) {
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if itemIDs == nil || itemIDs == "" {
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return BuildSuccessResponse([]interface{}{}), nil
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}
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// 处理itemIDs - 使用ParseStringParam
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itemIDStr := ParseStringParam(itemIDs, "")
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// 判断是单个ID还是多个ID（用逗号分隔）
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isSingle := true
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if str, ok := itemIDs.(string); ok {
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for _, ch := range str {
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if ch == ',' {
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isSingle = false
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break
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}
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}
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}
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// 根据ID数量选择不同的接口
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var url string
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if isSingle {
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// 单个视频接口 - 使用带签名的URL
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url = BuildURL("https://api5-normal-sinfonlineb.fqnovel.com/novel/player/video_model/v1")
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} else {
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// 批量视频接口
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url = BuildURL("https://reading.snssdk.com/novel/player/multi_video_model/v1/")
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}
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// 构建请求体，添加更多设备参数，请求所有清晰度
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requestBody := fmt.Sprintf(`{"biz_param":{"device_level":3,"need_all_video_definition":true,"need_mp4_align":false,"use_os_player":false,"video_platform":1024},"video_id":"%s"}`,
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itemIDStr)
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outputMode := ParseStringParam(output, "")
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qualityFilter := ParseStringParam(quality, "")
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if cfg := config.GetAppConfig(); cfg != nil {
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if outputMode == "" {
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outputMode = cfg.Fanqie.Video.OutputMode
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}
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if qualityFilter == "" {
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qualityFilter = cfg.Fanqie.Video.Quality
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}
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}
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if outputMode == "" {
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outputMode = "url"
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}
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deviceID := ""
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if outputMode == "proxy" {
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if dev := GetCurrentDevice(); dev != nil {
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deviceID = dev.DeviceHeader
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}
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}
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// 使用 GorgonRequest 添加签名和设备信息
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resp, err := GorgonRequest(url, map[string]interface{}{
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"method": "POST",
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"body": requestBody,
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"headers": map[string]string{
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"User-Agent": "com.dragon.read",
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"Content-Type": "application/json",
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},
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})
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if err != nil {
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videoLogger.Error(fmt.Sprintf("获取视频失败: %v", err))
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return BuildErrorResponse("FAILED"), err
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}
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respJSON, err := resp.JSON()
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if err != nil {
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videoLogger.Error(fmt.Sprintf("解析响应失败: %v", err))
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return BuildErrorResponse("FAILED"), err
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}
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// 检查响应码（可能返回 Code 或 code）
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var respCode float64
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var okCode bool
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if code, ok := respJSON["code"].(float64); ok {
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respCode, okCode = code, code == 0
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} else if code, ok := respJSON["Code"].(float64); ok {
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respCode, okCode = code, code == 0
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}
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if okCode {
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// 尝试获取 data（可能在不同位置）
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var data map[string]interface{}
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if d, ok := respJSON["data"].(map[string]interface{}); ok {
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data = d
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} else if d, ok := respJSON["Data"].(map[string]interface{}); ok {
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data = d
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}
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if data != nil {
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if videoModelStr, ok := data["video_model"].(string); ok && isSingle {
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decodedModel := decodeVideoModelAsJSON(videoModelStr, outputMode, deviceID, qualityFilter)
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// 清晰度过滤无匹配时报错（调用方能立即发现参数写错）
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if qualityFilter != "" {
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if vl, ok := decodedModel.(map[string]interface{})["video_list"].(map[string]interface{}); ok && len(vl) == 0 {
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return BuildErrorResponse(fmt.Sprintf("无匹配清晰度: %s（可用档位见 video_list）", qualityFilter)), nil
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}
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}
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// 单个接口直接返回 video_model
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response := map[string]interface{}{
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"code": 200,
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"message": "SUCCESS",
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"data": decodedModel,
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}
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return marshalNoEscape(response), nil
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} else {
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// 批量接口：data 是一个map，key是ID，value包含video_model
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result := make(map[string]interface{})
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for itemID, itemData := range data {
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if itemMap, ok := itemData.(map[string]interface{}); ok {
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if videoModelStr, ok := itemMap["video_model"].(string); ok {
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decodedModel := decodeVideoModelAsJSON(videoModelStr, outputMode, deviceID, qualityFilter)
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result[itemID] = map[string]interface{}{
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"video_model": decodedModel,
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}
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}
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}
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}
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// 构建返回结果
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response := map[string]interface{}{
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"code": 200,
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"message": "SUCCESS",
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"data": result,
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}
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return marshalNoEscape(response), nil
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}
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}
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}
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// 返回错误信息
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errMsg := "获取视频失败"
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if msg, ok := respJSON["message"].(string); ok {
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errMsg = msg
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} else if msg, ok := respJSON["Message"].(string); ok {
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errMsg = msg
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}
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videoLogger.Error(fmt.Sprintf("获取视频失败: code=%v, msg=%s", respCode, errMsg))
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return BuildErrorResponse(errMsg), nil
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}
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// decodeVideoModelAsJSON 解析并解码 video_model，返回关键字段的 JSON 对象。
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// outputMode=proxy 时把 CDN 链接替换为本地解密代理链接（/video/proxy/{key}）
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// qualityFilter 非空时只保留匹配的清晰度（definition 或档位 key，大小写不敏感）
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func decodeVideoModelAsJSON(videoModelStr, outputMode, deviceID, qualityFilter string) interface{} {
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// 解析 video_model JSON 字符串
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var videoModel map[string]interface{}
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if err := json.Unmarshal([]byte(videoModelStr), &videoModel); err != nil {
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// 解析失败，返回空对象
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return map[string]interface{}{}
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}
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// 解包嵌套的 JSON 字符串字段（category_schema、recommend_info 等）
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if unwrapped, ok := UnwrapJSONStrings(videoModel).(map[string]interface{}); ok {
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videoModel = unwrapped
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}
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// 构建精简的返回结果，只包含关键字段
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result := make(map[string]interface{})
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// 提取关键字段
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videoID := ""
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if v, ok := videoModel["video_id"].(string); ok {
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result["video_id"] = v
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videoID = v
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}
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if duration, ok := videoModel["video_duration"].(float64); ok {
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result["video_duration"] = formatDuration(duration)
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}
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if posterURL, ok := videoModel["poster_url"].(string); ok {
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result["poster_url"] = posterURL
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}
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// 加密信息：视频为 CENC 加密（encrypt=true），解密需要 key_seed/kid
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if keySeed, ok := videoModel["key_seed"].(string); ok {
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result["key_seed"] = keySeed
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}
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// 处理 video_list
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if videoList, ok := videoModel["video_list"].(map[string]interface{}); ok {
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// max/best：解析为实际最高档位 key（不同视频可用档位不同，按 vheight/definition 取最大）
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if strings.EqualFold(qualityFilter, "max") || strings.EqualFold(qualityFilter, "best") {
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bestKey, bestH := "", 0
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for q, qd := range videoList {
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qm, ok := qd.(map[string]interface{})
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if !ok {
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continue
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}
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if h := qualityHeight(qm); h > bestH {
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bestH, bestKey = h, q
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}
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}
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qualityFilter = bestKey
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}
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processedVideoList := make(map[string]interface{})
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for quality, qualityData := range videoList {
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if qualityMap, ok := qualityData.(map[string]interface{}); ok {
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// 清晰度过滤：匹配档位 key（video_1）或 definition（720p）
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if qualityFilter != "" {
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def, _ := qualityMap["definition"].(string)
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if !strings.EqualFold(quality, qualityFilter) && !strings.EqualFold(def, qualityFilter) {
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continue
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}
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}
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// spade_a（PlayAuth）：解出 CENC 内容密钥的种子，proxy 模式随代理下发
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spadeA := ""
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if v, ok := qualityMap["spade_a"].(string); ok {
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spadeA = v
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}
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// 只保留关键字段
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qualityInfo := make(map[string]interface{})
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if definition, ok := qualityMap["definition"].(string); ok {
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qualityInfo["definition"] = definition
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}
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if vtype, ok := qualityMap["vtype"].(string); ok {
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qualityInfo["vtype"] = vtype
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}
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if vwidth, ok := qualityMap["vwidth"].(float64); ok {
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qualityInfo["vwidth"] = int(vwidth)
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}
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if vheight, ok := qualityMap["vheight"].(float64); ok {
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qualityInfo["vheight"] = int(vheight)
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}
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if bitrate, ok := qualityMap["bitrate"].(float64); ok {
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qualityInfo["bitrate"] = formatBitrate(bitrate)
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}
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if size, ok := qualityMap["size"].(float64); ok {
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qualityInfo["size"] = formatFileSize(size)
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}
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if fps, ok := qualityMap["fps"].(float64); ok {
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qualityInfo["fps"] = int(fps)
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}
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if encrypt, ok := qualityMap["encrypt"].(bool); ok && encrypt {
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qualityInfo["encrypt"] = true
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if em, ok := qualityMap["encryption_method"].(string); ok {
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qualityInfo["encryption_method"] = em
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}
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if kid, ok := qualityMap["kid"].(string); ok {
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qualityInfo["kid"] = kid
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}
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}
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// 解码 main_url / backup_url_1（base64 的CDN链接），proxy 模式替换为解密代理。
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// 代理 key 用 videoID+档位（稳定），同一视频重复调用复用磁盘缓存
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processURL := func(b64 string) interface{} {
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decoded, err := base64.StdEncoding.DecodeString(b64)
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if err != nil {
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return b64
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}
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if outputMode == "proxy" && spadeA != "" && videoID != "" {
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return GenerateVideoProxyURL(videoID+"_"+quality, string(decoded), deviceID, spadeA)
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}
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return string(decoded)
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}
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if mainURL, ok := qualityMap["main_url"].(string); ok {
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qualityInfo["main_url"] = processURL(mainURL)
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}
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if backupURL, ok := qualityMap["backup_url_1"].(string); ok {
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qualityInfo["backup_url_1"] = processURL(backupURL)
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}
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processedVideoList[quality] = qualityInfo
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}
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}
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result["video_list"] = processedVideoList
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}
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return result
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}
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// qualityHeight 取清晰度的比较高度：优先 vheight，缺失时从 definition（如 "720p"）解析
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func qualityHeight(qm map[string]interface{}) int {
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if h, ok := qm["vheight"].(float64); ok && h > 0 {
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return int(h)
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}
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def, _ := qm["definition"].(string)
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n := 0
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for _, c := range def {
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if c < '0' || c > '9' {
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break
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}
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n = n*10 + int(c-'0')
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}
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return n
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}
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// formatDuration 将秒数转换为可读的时间格式
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func formatDuration(seconds float64) string {
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totalSeconds := int(math.Round(seconds))
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hours := totalSeconds / 3600
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minutes := (totalSeconds % 3600) / 60
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secs := totalSeconds % 60
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if hours > 0 {
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return fmt.Sprintf("%d小时%d分%d秒", hours, minutes, secs)
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} else if minutes > 0 {
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return fmt.Sprintf("%d分%d秒", minutes, secs)
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}
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return fmt.Sprintf("%d秒", secs)
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}
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// formatFileSize 将字节数转换为可读的文件大小格式
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func formatFileSize(bytes float64) string {
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const unit = 1024.0
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if bytes < unit {
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return fmt.Sprintf("%.0f B", bytes)
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}
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kb := bytes / unit
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if kb < unit {
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return fmt.Sprintf("%.2f KB", kb)
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}
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mb := kb / unit
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if mb < unit {
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return fmt.Sprintf("%.2f MB", mb)
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}
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gb := mb / unit
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return fmt.Sprintf("%.2f GB", gb)
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}
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// formatBitrate 将比特率转换为可读的格式
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func formatBitrate(bitrate float64) string {
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const unit = 1000.0
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kbps := bitrate / unit
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if kbps < unit {
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return fmt.Sprintf("%.0f Kbps", kbps)
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}
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mbps := kbps / unit
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return fmt.Sprintf("%.2f Mbps", mbps)
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}
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// GenerateVideoProxyURL 生成视频解密代理URL。
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// cacheKey 需稳定（videoID+档位）：映射表覆盖式更新，磁盘缓存按 key 复用
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func GenerateVideoProxyURL(cacheKey, originalURL, deviceID, spadeA string) string {
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headers := map[string]string{"x-spade-a": spadeA}
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if redisCache != nil {
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saveAudioProxyEntry(cacheKey, &audioProxyEntry{
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OriginalURL: originalURL,
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DeviceID: deviceID,
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Headers: headers,
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})
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return "/video/proxy/" + cacheKey
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}
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headersJSON, _ := json.Marshal(headers)
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if cacheDB != nil {
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cacheDB.Exec(q(`
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INSERT INTO audio_cache (key, original_url, device_id, headers, created_at, updated_at)
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VALUES (?, ?, ?, ?, ?, ?)
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ON CONFLICT(key) DO UPDATE SET original_url = excluded.original_url,
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device_id = excluded.device_id, headers = excluded.headers, updated_at = excluded.updated_at
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`), cacheKey, originalURL, deviceID, string(headersJSON), time.Now().Unix(), time.Now().Unix())
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}
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return "/video/proxy/" + cacheKey
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}
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// videoCachePath 解密后视频的磁盘缓存路径；缓存未启用返回空串
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func videoCachePath(key string) string {
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cfg := config.GetAppConfig()
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if cfg == nil || !cfg.Fanqie.Video.CacheEnabled || cfg.Fanqie.Video.CachePath == "" {
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return ""
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}
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return filepath.Join(cfg.Fanqie.Video.CachePath, key+".mp4")
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}
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// HandleVideoProxy 处理视频代理请求：磁盘缓存命中直接返回；否则下载 CENC 加密 MP4 →
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// SpadeA 解 key → 解密 → 写入缓存。返回 ReadSeeker 供 http.ServeContent（支持 Range/seek）。
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func HandleVideoProxy(key string) (io.ReadSeeker, string, error) {
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// 磁盘缓存命中：直接返回文件（映射记录即使过期也不影响已缓存的视频）
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if p := videoCachePath(key); p != "" {
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if f, err := os.Open(p); err == nil {
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return f, "video/mp4", nil
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}
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}
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entry, err := loadMediaProxyEntry(key)
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if err != nil {
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return nil, "", err
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}
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spadeA := entry.Headers["x-spade-a"]
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if spadeA == "" {
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return nil, "", fmt.Errorf("视频信息缺少 spade_a，请重新调用 /video 接口")
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}
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body, _, err := downloadMediaWithRetry(entry.OriginalURL, entry.DeviceID, entry.Headers, 3)
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if err != nil {
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return nil, "", fmt.Errorf("下载视频失败: %w", err)
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}
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defer body.Close()
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data, err := io.ReadAll(body)
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if err != nil {
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return nil, "", fmt.Errorf("读取视频失败: %w", err)
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}
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contentKey, err := DecodeSpadeKey(spadeA)
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if err != nil {
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return nil, "", fmt.Errorf("解密视频失败: %w", err)
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}
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if err := DecryptCENCMP4(data, contentKey); err != nil {
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return nil, "", fmt.Errorf("解密视频失败: %w", err)
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}
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// 写入磁盘缓存（临时文件 + rename 原子替换；失败不影响本次返回）
|
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if p := videoCachePath(key); p != "" {
|
||
if err := os.MkdirAll(filepath.Dir(p), 0755); err == nil {
|
||
if tmp, err := os.CreateTemp(filepath.Dir(p), ".tmp-*"); err == nil {
|
||
if _, werr := tmp.Write(data); werr == nil {
|
||
tmp.Close()
|
||
if err := os.Rename(tmp.Name(), p); err != nil {
|
||
os.Remove(tmp.Name())
|
||
}
|
||
} else {
|
||
tmp.Close()
|
||
os.Remove(tmp.Name())
|
||
}
|
||
}
|
||
}
|
||
}
|
||
return bytes.NewReader(data), "video/mp4", nil
|
||
}
|
||
|
||
// CleanupVideoCache 清理磁盘视频缓存中 mtime 过早的文件，挂接在缓存定期清理任务中
|
||
func CleanupVideoCache() {
|
||
cfg := config.GetAppConfig()
|
||
if cfg == nil || !cfg.Fanqie.Video.CacheEnabled {
|
||
return
|
||
}
|
||
dir := cfg.Fanqie.Video.CachePath
|
||
entries, err := os.ReadDir(dir)
|
||
if err != nil {
|
||
return // 目录不存在等：无缓存可清
|
||
}
|
||
const maxAge = 7 * 24 * time.Hour // ponytail: 固定 7 天，需要更长保留时改配置语义
|
||
cutoff := time.Now().Add(-maxAge)
|
||
removed := 0
|
||
for _, e := range entries {
|
||
info, err := e.Info()
|
||
if err != nil || info.IsDir() {
|
||
continue
|
||
}
|
||
if info.ModTime().Before(cutoff) {
|
||
if os.Remove(filepath.Join(dir, e.Name())) == nil {
|
||
removed++
|
||
}
|
||
}
|
||
}
|
||
if removed > 0 {
|
||
videoLogger.Info(fmt.Sprintf("已清理 %d 个过期视频缓存文件", removed))
|
||
}
|
||
}
|
||
|