security(chat): secure chat stream endpoint with jwt validation and token extraction

app/src/main/java/com/stand/standapp/AppConfig.kt

@@ -10,6 +10,7 @@ object AppConfig {
     private const val KEY_REMEMBER_LOGIN = "remember_login"
     private const val KEY_USERNAME = "saved_username"
     private const val KEY_PASSWORD = "saved_password"
+    private const val KEY_ACCESS_TOKEN = "access_token"
     
     // 默认配置
     const val DEFAULT_SERVER_URL = "https://template.gyouzhe.com"
@@ -68,4 +69,12 @@ object AppConfig {
     fun setSavedPassword(context: Context, password: String) {
         getPrefs(context).edit().putString(KEY_PASSWORD, password).apply()
     }
+
+    fun getAccessToken(context: Context): String {
+        return getPrefs(context).getString(KEY_ACCESS_TOKEN, "") ?: ""
+    }
+
+    fun setAccessToken(context: Context, token: String) {
+        getPrefs(context).edit().putString(KEY_ACCESS_TOKEN, token).apply()
+    }
 }

app/src/main/java/com/stand/standapp/LoginActivity.kt

@@ -155,6 +155,7 @@ class LoginActivity : AppCompatActivity() {
                             val data = json.optJSONObject("data")
                             val loginData = data?.toString() ?: "{}"
                             val accessToken = data?.optString("access_token", "") ?: ""
+                            AppConfig.setAccessToken(this@LoginActivity, accessToken)
 
                             Toast.makeText(applicationContext, "登录成功", Toast.LENGTH_SHORT).show()
 

app/src/main/java/com/stand/standapp/ui/chat/ChatViewModel.kt

@@ -1,7 +1,9 @@
 package com.stand.standapp.ui.chat
 
-import androidx.lifecycle.ViewModel
+import android.app.Application
+import androidx.lifecycle.AndroidViewModel
 import androidx.lifecycle.viewModelScope
+import com.stand.standapp.AppConfig
 import com.stand.standapp.ui.chat.model.ChatMessage
 import com.stand.standapp.ui.chat.model.ChatSession
 import com.stand.standapp.ui.chat.repo.AiChatRepository
@@ -13,7 +15,7 @@ import kotlinx.coroutines.flow.onCompletion
 import kotlinx.coroutines.launch
 import java.util.UUID
 
-class ChatViewModel : ViewModel() {
+class ChatViewModel(application: Application) : AndroidViewModel(application) {
     private val repository = AiChatRepository()
 
     private val _sessions = MutableStateFlow<List<ChatSession>>(emptyList())
@@ -56,7 +58,8 @@ class ChatViewModel : ViewModel() {
 
         // 4. 发起网络请求，流式追加内容
         viewModelScope.launch {
-            repository.streamChat(content)
+            val token = AppConfig.getAccessToken(getApplication())
+            repository.streamChat(content, token)
                 .catch { e ->
                     appendAiMessageChunk(aiMsgId, "\n[请求异常: ${e.message}]")
                     finalizeAiMessage(aiMsgId)

app/src/main/java/com/stand/standapp/ui/chat/repo/AiChatRepository.kt

@@ -22,11 +22,12 @@ class AiChatRepository {
         .readTimeout(0, TimeUnit.MILLISECONDS) // SSE 需要关闭读取超时
         .build()
 
-    fun streamChat(message: String): Flow<String> = callbackFlow {
+    fun streamChat(message: String, token: String): Flow<String> = callbackFlow {
         val json = """{"message": "$message"}"""
         val request = Request.Builder()
             .url(backendUrl)
             .post(json.toRequestBody("application/json".toMediaType()))
+            .header("Authorization", "Bearer $token")
             .header("Accept", "text/event-stream")
             .build()