Bosch_Demo/LaodingBot
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Refactored orchestrator for staged file handling, added structured prompt support, adjusted Feishu file handling

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This commit is contained in:
whlaoding
2026-03-08 22:38:29 +08:00
parent e2f806edb3
commit 52b8dbb835
30 changed files with 9325 additions and 34 deletions
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222
internal/transport/feishu/bot.go
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@@ -4,6 +4,10 @@ import (
"context"
"encoding/json"
"fmt"
"io"
"mime"
"os"
"path/filepath"
"strings"
"sync"
"time"
@@ -34,9 +38,17 @@ type IncomingMessage struct {
MessageID string
ChatID string
UserID string
MsgType string
Text string
FileName string
FileKey string
FileMime string
FileBytes []byte
FilePath string
}
const maxFeishuFileBytes = 20 * 1024 * 1024
func NewBot(appID, appSecret, verifyToken, _ string, _ string, log *logger.Logger) (*Bot, error) {
if appID == "" || appSecret == "" {
return nil, fmt.Errorf("empty feishu app credentials")
@@ -66,7 +78,7 @@ func (b *Bot) Run(ctx context.Context, handler func(context.Context, IncomingMes
incoming, ok := parseIncoming(event)
if !ok {
if b.log != nil {
b.log.Debugf("skip non-text or invalid feishu event")
b.log.Debugf("skip unsupported or invalid feishu event")
}
return nil
}
@@ -76,8 +88,11 @@ func (b *Bot) Run(ctx context.Context, handler func(context.Context, IncomingMes
}
return nil
}
if incoming.MsgType == "file" {
b.enrichFileIncoming(evtCtx, &incoming)
}
if b.log != nil {
b.log.Infof("feishu message received message_id=%s chat_id=%s user_id=%s text=%s", incoming.MessageID, incoming.ChatID, incoming.UserID, incoming.Text)
b.log.Infof("feishu message received message_id=%s chat_id=%s user_id=%s msg_type=%s text=%s", incoming.MessageID, incoming.ChatID, incoming.UserID, incoming.MsgType, incoming.Text)
}
reply, err := handler(evtCtx, incoming)
if err != nil {
@@ -159,6 +174,175 @@ func extractText(content string) (string, error) {
return parsed.Text, nil
}
func extractFileMeta(content string) (fileName string, fileKey string, err error) {
var parsed map[string]any
if err := json.Unmarshal([]byte(content), &parsed); err != nil {
return "", "", err
}
readString := func(keys ...string) string {
for _, key := range keys {
if v, ok := parsed[key]; ok {
s, ok := v.(string)
if ok {
trimmed := strings.TrimSpace(s)
if trimmed != "" {
return trimmed
}
}
}
}
return ""
}
fileName = readString("file_name", "fileName", "name", "filename")
fileKey = readString("file_key", "fileKey", "key")
return fileName, fileKey, nil
}
func buildFileRecognitionText(fileName, fileKey string) string {
if strings.TrimSpace(fileName) == "" {
fileName = "(unknown)"
}
if strings.TrimSpace(fileKey) == "" {
fileKey = "(unknown)"
}
return strings.Join([]string{
"用户发送了一条飞书文件消息。",
"文件名: " + fileName,
"文件Key: " + fileKey,
"系统将先上传该文件到 LLM Provider，再由模型完成文档解析。若上传失败，本次请求将直接中止。",
}, "\n")
}
func (b *Bot) enrichFileIncoming(ctx context.Context, incoming *IncomingMessage) {
if incoming == nil {
return
}
if strings.TrimSpace(incoming.MessageID) == "" || strings.TrimSpace(incoming.FileKey) == "" {
incoming.Text = buildFileRecognitionText(incoming.FileName, incoming.FileKey)
incoming.Text += "\n\n未找到完整 file_key 或 message_id，暂时无法下载文件内容。"
return
}
content, fileName, err := b.downloadFileContent(ctx, incoming.MessageID, incoming.FileKey)
if err != nil {
if b.log != nil {
b.log.Warnf("feishu download file content failed message_id=%s file_key=%s err=%v", incoming.MessageID, incoming.FileKey, err)
}
incoming.Text = buildFileRecognitionText(incoming.FileName, incoming.FileKey)
incoming.Text += "\n\n文件下载失败: " + err.Error()
return
}
if strings.TrimSpace(fileName) != "" {
incoming.FileName = fileName
}
incoming.FileBytes = content
incoming.FileMime = detectMimeByName(incoming.FileName)
localPath, saveErr := saveIncomingFile("files", incoming.FileName, incoming.FileBytes)
if saveErr != nil {
if b.log != nil {
b.log.Warnf("save incoming feishu file failed name=%s err=%v", incoming.FileName, saveErr)
}
incoming.Text = buildFileRecognitionText(incoming.FileName, incoming.FileKey)
incoming.Text += "\n\n文件已下载但本地保存失败: " + saveErr.Error()
return
}
incoming.FilePath = localPath
incoming.Text = buildFileRecognitionText(incoming.FileName, incoming.FileKey)
incoming.Text += fmt.Sprintf("\n\n文件已下载并保存到本地，路径=%s，大小=%d bytes，mime=%s。", incoming.FilePath, len(content), incoming.FileMime)
}
func (b *Bot) downloadFileContent(ctx context.Context, messageID, fileKey string) ([]byte, string, error) {
req := larkim.NewGetMessageResourceReqBuilder().
MessageId(messageID).
FileKey(fileKey).
Type("file").
Build()
resp, err := b.apiClient.Im.MessageResource.Get(ctx, req)
if err != nil {
return nil, "", err
}
if resp == nil || resp.File == nil {
if resp != nil {
return nil, "", fmt.Errorf("empty file stream code=%d msg=%s", resp.Code, resp.Msg)
}
return nil, "", fmt.Errorf("empty file stream")
}
bts, err := io.ReadAll(resp.File)
if err != nil {
return nil, "", err
}
if len(bts) > maxFeishuFileBytes {
return nil, "", fmt.Errorf("file too large: %d bytes, max=%d", len(bts), maxFeishuFileBytes)
}
return bts, strings.TrimSpace(resp.FileName), nil
}
func detectMimeByName(fileName string) string {
ext := strings.ToLower(strings.TrimSpace(filepath.Ext(fileName)))
if ext == "" {
return "application/octet-stream"
}
m := strings.TrimSpace(mime.TypeByExtension(ext))
if m == "" {
return "application/octet-stream"
}
return m
}
func saveIncomingFile(baseDir, fileName string, content []byte) (string, error) {
if len(content) == 0 {
return "", fmt.Errorf("empty file content")
}
if strings.TrimSpace(baseDir) == "" {
baseDir = "files"
}
if err := os.MkdirAll(baseDir, 0o755); err != nil {
return "", err
}
safeName := sanitizeFileName(fileName)
if safeName == "" {
safeName = "upload.bin"
}
finalName := fmt.Sprintf("%d_%s", time.Now().UnixNano(), safeName)
target := filepath.Join(baseDir, finalName)
if err := os.WriteFile(target, content, 0o644); err != nil {
return "", err
}
abs, err := filepath.Abs(target)
if err != nil {
return target, nil
}
return abs, nil
}
func sanitizeFileName(fileName string) string {
name := strings.TrimSpace(filepath.Base(fileName))
if name == "" || name == "." || name == ".." {
return ""
}
var b strings.Builder
for _, r := range name {
if (r >= 'a' && r <= 'z') || (r >= 'A' && r <= 'Z') || (r >= '0' && r <= '9') || r == '.' || r == '_' || r == '-' {
b.WriteRune(r)
continue
}
b.WriteByte('_')
}
out := strings.TrimSpace(b.String())
if out == "" || out == "." || out == ".." {
return ""
}
if strings.HasPrefix(out, ".") {
out = "file" + out
}
return out
}
func parseIncoming(event *larkim.P2MessageReceiveV1) (IncomingMessage, bool) {
if event == nil || event.Event == nil || event.Event.Message == nil || event.Event.Sender == nil || event.Event.Sender.SenderId == nil {
return IncomingMessage{}, false
@@ -168,12 +352,11 @@ func parseIncoming(event *larkim.P2MessageReceiveV1) (IncomingMessage, bool) {
}
msg := event.Event.Message
if msg.MessageType == nil || *msg.MessageType != "text" || msg.ChatId == nil || msg.Content == nil || msg.MessageId == nil {
if msg.MessageType == nil || msg.ChatId == nil || msg.Content == nil || msg.MessageId == nil {
return IncomingMessage{}, false
}
text, err := extractText(*msg.Content)
if err != nil {
msgType := strings.TrimSpace(*msg.MessageType)
if msgType == "" {
return IncomingMessage{}, false
}
@@ -186,12 +369,33 @@ func parseIncoming(event *larkim.P2MessageReceiveV1) (IncomingMessage, bool) {
userID = *event.Event.Sender.SenderId.UnionId
}
return IncomingMessage{
incoming := IncomingMessage{
MessageID: *msg.MessageId,
ChatID: *msg.ChatId,
UserID: userID,
Text: text,
}, true
MsgType: msgType,
}
switch msgType {
case "text":
text, err := extractText(*msg.Content)
if err != nil {
return IncomingMessage{}, false
}
incoming.Text = text
return incoming, true
case "file":
fileName, fileKey, err := extractFileMeta(*msg.Content)
if err != nil {
return IncomingMessage{}, false
}
incoming.FileName = fileName
incoming.FileKey = fileKey
incoming.Text = buildFileRecognitionText(fileName, fileKey)
return incoming, true
default:
return IncomingMessage{}, false
}
}
func (b *Bot) shouldProcessMessage(messageID string) bool {