优化登录和权限检查逻辑，增加用户存在性验证，改进错误处理

src/db/auth.cpp

@@ -86,7 +86,7 @@ extern "C"
         auto value  = std::string{};
         auto status = user_db->Get(leveldb::ReadOptions{}, mangle_user_id(user_id), &value);
         if (!status.ok()) {
-            std::println(stderr, "Failed to login: {}", status.ToString());
+            if (!status.IsNotFound()) std::println(stderr, "Failed to login: {}", status.ToString());
             return 0;
         }
         *result = validate_password(password, value.data());
@@ -132,7 +132,7 @@ extern "C"
         if (status.ok()) {
             *result = std::stoi(value);
         } else {
-            std::println(stderr, "Failed to get user permission: {}", status.ToString());
+            if (!status.IsNotFound()) std::println(stderr, "Failed to get user permission: {}", status.ToString());
             return 0;
         }
         return 1;

src/server/auth/admin.c

@@ -55,6 +55,8 @@ static int field_get(const char* key, const char* value, size_t valuelen, void*
         form->user_id = kqm_strndup(value, valuelen);
     } else if (strcmp(key, "raw_passwd") == 0) {
         form->raw_passwd = kqm_strndup(value, valuelen);
+    } else if (strcmp(key, "new_passwd") == 0) {
+        form->new_passwd = kqm_strndup(value, valuelen);
     } else if (strcmp(key, "permission") == 0) {
         form->permission = kqm_strndup(value, valuelen);
     }
@@ -89,10 +91,12 @@ static void impl_repasswd(mg_connection* conn, admin_form_t* form)
     }
 
     int result;
-    if (!admin_login(form->password, &result)) {
+    if (!admin_login(form->raw_passwd, &result)) {
         res_unauth(conn);
+        return;
     } else if (!result) {
         res_incorrect(conn);
+        return;
     }
 
     if (!set_admin_password(form->new_passwd)) {
@@ -113,7 +117,17 @@ static void impl_repasswd2(mg_connection* conn, admin_form_t* form)
         return;
     }
 
-    int flag = set_user_password(form->user_id, form->new_passwd);
+    int result;
+    int flag = check_user_exists(form->user_id, &result);
+    if (!flag) {
+        res_check_exist_fail(conn);
+        return;
+    } else if (!result) {
+        res_not_exist(conn);
+        return;
+    }
+
+    flag = set_user_password(form->user_id, form->new_passwd);
     if (!flag) {
         res_repasswd_fail(conn);
     } else {
@@ -147,7 +161,17 @@ static void impl_delete(mg_connection* conn, admin_form_t* form)
         return;
     }
 
-    int flag = delete_user(form->user_id);
+    int result;
+    int flag = check_user_exists(form->user_id, &result);
+    if (!flag) {
+        res_check_exist_fail(conn);
+        return;
+    } else if (!result) {
+        res_not_exist(conn);
+        return;
+    }
+
+    flag = delete_user(form->user_id);
     if (!flag) {
         res_delete_account_fail(conn);
     } else {
@@ -155,6 +179,11 @@ static void impl_delete(mg_connection* conn, admin_form_t* form)
     }
 }
 
+static void impl_auth(mg_connection* conn, admin_form_t* form)
+{
+    res_auth(conn);
+}
+
 
 int admin_handler(mg_connection* conn, void* cbdata)
 {
@@ -181,17 +210,20 @@ int admin_handler(mg_connection* conn, void* cbdata)
 
     mg_handle_form_request(conn, &admin_callback);
 
-    if (form.action && !strcmp(form.action, "login")) {
-        form.token    = strdup("");
+    if (!admin_session) {
         admin_session = strdup("");
     }
 
+    if (form.action && !strcmp(form.action, "login")) {
+        form.token = strdup(admin_session);
+    }
+
     if (!form.action) {
         res_need_action(conn);
     } else if (!form.token) {
         res_need_token(conn);
     } else if (!admin_session || strcmp(form.token, admin_session)) {
-        res_permission_denied(conn);
+        res_auth_fail(conn);
     } else {
         if (!strcmp(form.action, "login")) {
             impl_login(conn, &form);
@@ -203,6 +235,8 @@ int admin_handler(mg_connection* conn, void* cbdata)
             impl_permission(conn, &form);
         } else if (!strcmp(form.action, "delete")) {
             impl_delete(conn, &form);
+        } else if (!strcmp(form.action, "auth")) {
+            impl_auth(conn, &form);
         } else {
             res_bad_action(conn);
         }

src/server/auth/repasswd.c

@@ -1,5 +1,6 @@
 #include "server/auth.h"
 #include "server/response.h"
+#include "server/types.h"
 #include "server/util.h"
 
 
@@ -54,6 +55,60 @@ static int field_get(const char* key, const char* value, size_t valuelen, void*
     return MG_FORM_FIELD_HANDLE_GET;
 }
 
+static void impl_self(mg_connection* conn, const char* user_id, repasswd_form_t* form)
+{
+    int result;
+    int flag = login(user_id, form->raw_passwd, &result);
+    if (!flag) {
+        res_repasswd_fail(conn);
+    } else {
+        if (result) {
+            flag = set_user_password(user_id, form->new_passwd);
+            if (!flag) {
+                res_repasswd_fail(conn);
+            } else {
+                res_repasswd(conn);
+            }
+        } else {
+            res_incorrect(conn);
+        }
+    }
+}
+
+static void impl_others(mg_connection* conn, const char* user_id, repasswd_form_t* form)
+{
+    int result1, result2;
+    int flag  = check_user_exists(user_id, &result1);
+    flag     &= check_user_exists(form->user_id, &result2);
+    if (!flag) {
+        res_check_exist_fail(conn);
+        return;
+    }
+    if (!(result1 && result2)) {
+        res_not_exist(conn);
+        return;
+    }
+
+    int perm1, perm2;
+    flag  = get_user_permission(user_id, &perm1);
+    flag &= get_user_permission(form->user_id, &perm2);
+    if (!flag) {
+        res_check_permission_fail(conn);
+        return;
+    }
+
+    if (perm1 == 1 && perm2 == 2) {
+        int flag = set_user_password(form->user_id, form->new_passwd);
+        if (!flag) {
+            res_repasswd_fail(conn);
+        } else {
+            res_repasswd(conn);
+        }
+    } else {
+        res_permission_denied(conn);
+    }
+}
+
 int user_repasswd_handler(mg_connection* conn, void* cbdata)
 {
     const mg_request_info* post_body = mg_get_request_info(conn);
@@ -97,45 +152,9 @@ int user_repasswd_handler(mg_connection* conn, void* cbdata)
     char* user_id = get_payload(form.token);
 
     if (form.user_id && strcmp(user_id, form.user_id)) {
-        int perm1;
-        int flag = get_user_permission(user_id, &perm1);
-        if (!flag) {
-            res_check_permission_fail(conn);
-        }
-
-        int perm2;
-        flag = get_user_permission(form.user_id, &perm2);
-        if (!flag) {
-            res_check_permission_fail(conn);
-        }
-
-        if (perm1 < perm2) {
-            int flag = set_user_password(form.user_id, form.new_passwd);
-            if (!flag) {
-                res_repasswd_fail(conn);
-            } else {
-                res_repasswd(conn);
-            }
-        } else {
-            res_permission_denied(conn);
-        }
-    } else if(form.raw_passwd) {
-        int result;
-        int flag = login(user_id, form.raw_passwd, &result);
-        if (!flag) {
-            res_repasswd_fail(conn);
-        } else {
-            if (result) {
-                flag = set_user_password(user_id, form.new_passwd);
-                if (!flag) {
-                    res_repasswd_fail(conn);
-                } else {
-                    res_repasswd(conn);
-                }
-            } else {
-                res_incorrect(conn);
-            }
-        }
+        impl_others(conn, user_id, &form);
+    } else if (form.raw_passwd) {
+        impl_self(conn, user_id, &form);
     } else {
         res_need_password(conn);
     }

ui/src/components/admin/AdminPanel.vue

@@ -18,8 +18,11 @@
       <v-chip class="chips" color="blue" @click="dialogRepasswd2Show = true">
         修改指定用户的密码
       </v-chip>
+      <v-chip class="chips" color="green" @click="dialogPermissionShow = true">
+        修改指定用户的身份
+      </v-chip>
       <v-chip class="chips" color="red" @click="dialogDeleteAccountShow = true">
-        删除指定用户的账号
+        删除指定用户的权限
       </v-chip>
     </v-card-item>
   </v-card>
@@ -32,6 +35,7 @@
   </v-dialog>
   <RepasswdDialog v-model="dialogRepasswdShow"></RepasswdDialog>
   <Repasswd2Dialog v-model="dialogRepasswd2Show"></Repasswd2Dialog>
+  <Permission v-model="dialogPermissionShow"></Permission>
   <DeleteAccountDialog v-model="dialogDeleteAccountShow"></DeleteAccountDialog>
 </template>
 
@@ -42,6 +46,7 @@ import axios, { AxiosError } from 'axios';
 import RepasswdDialog from './RepasswdDialog.vue';
 import Repasswd2Dialog from './Repasswd2Dialog .vue';
 import DeleteAccountDialog from './DeleteAccountDialog.vue';
+import Permission from './Permission.vue';
 
 const authStore = useAuthStore();
 const storedAdminToken = ref(authStore.adminToken);
@@ -53,6 +58,7 @@ const dialogClose = ref(() => { });
 
 const dialogRepasswdShow = ref(false);
 const dialogRepasswd2Show = ref(false);
+const dialogPermissionShow = ref(false);
 const dialogDeleteAccountShow = ref(false);
 
 const dialog = (title: string, text: string) => {

ui/src/components/admin/Permission.vue

@@ -0,0 +1,131 @@
+<template>
+  <v-dialog v-model="dialogPermissionShow" max-width="448">
+    <v-card class="mx-auto pa-12 pb-8" elevation="8" width="100%" rounded="lg">
+      <v-form fast-fail @submit.prevent="submit">
+
+        <v-text-field v-model="userId" prepend-inner-icon="mdi-account-circle" :rules="userIdRules" label="账号"
+          @blur="updateUserPermission"></v-text-field>
+
+        <v-divider :thickness="10" class="border-opacity-0"></v-divider>
+
+        <v-select v-model="permission" label="权限" item-title="title" item-value="value" :items="permissions"></v-select>
+
+        <v-divider :thickness="10" class="border-opacity-0"></v-divider>
+
+        <v-btn :loading="loading" class="mb-8" color="blue" size="large" type="submit" variant="tonal" block>
+          修改权限
+        </v-btn>
+
+      </v-form>
+    </v-card>
+  </v-dialog>
+  <v-dialog v-model="dialogShow" width="auto">
+    <v-card max-width="400" prepend-icon="mdi-update" :text="dialogText" :title="dialogTitle">
+      <template v-slot:actions>
+        <v-btn class="ms-auto" text="Ok" @click="dialogShow = false, dialogClose()"></v-btn>
+      </template>
+    </v-card>
+  </v-dialog>
+</template>
+
+<script setup lang="ts">
+import { ref, watch } from 'vue';
+import { useAuthStore } from '@/store/auth';
+import axios, { AxiosError } from 'axios';
+
+const dialogShow = ref(false);
+const dialogTitle = ref('');
+const dialogText = ref('');
+const dialogClose = ref(() => { });
+
+const dialog = (title: string, text: string) => {
+  dialogTitle.value = title;
+  dialogText.value = text;
+  dialogShow.value = true;
+  return new Promise(res => {
+    dialogClose.value = res as () => void;
+  });
+};
+
+const dialogPermissionShow = defineModel({ default: true });
+
+const loading = ref(false);
+const userId = ref('');
+const authStore = useAuthStore();
+const storedAdminToken = ref(authStore.adminToken);
+
+type UserPermissionResponse = { success?: string, permission?: string, error?: string };
+
+const queryPermission = async () => {
+  try {
+    const formData = new FormData;
+    formData.append("user_id", userId.value);
+    let res = await axios.post('/api/auth/permission', formData);
+    return res.data as UserPermissionResponse;
+  } catch (e) {
+    let ex = e as AxiosError;
+    return ex.response?.data as UserPermissionResponse;
+  }
+}
+
+const permissions = [
+  { title: '老师', value: '1' },
+  { title: '学生', value: '2' }
+];
+const permission = ref(permissions[0]);
+
+const updateUserPermission = async () => {
+  if (userId.value == '') return;
+  let userPermission = '';
+  let res = await queryPermission();
+  if (res?.success) {
+    userPermission = res.permission as string;
+  }
+  permission.value = permissions[userPermission as any as number - 1];
+}
+
+watch(userId, () => {
+  permission.value = undefined as any;
+}, { immediate: true });
+
+const userIdRules: any = [(value: string) => {
+  if (value?.length > 0) return true;
+  return '账号不能为空';
+}];
+
+type PermissionResponse = { success?: string, error?: string };
+
+const requestPermission = async () => {
+  try {
+    const formData = new FormData;
+    formData.append("action", "permission");
+    formData.append("token", storedAdminToken.value);
+    formData.append("user_id", userId.value);
+    formData.append("permission", permission.value as any);
+    let res = await axios.post('/api/auth/admin', formData);
+    return res.data as PermissionResponse;
+  } catch (e) {
+    let ex = e as AxiosError;
+    if (ex.response?.data) {
+      return ex.response?.data as PermissionResponse;
+    } {
+      return { error: ex.message };
+    }
+  }
+}
+
+const submit = async () => {
+  loading.value = true;
+  let res = await requestPermission();
+  loading.value = false;
+  if (res?.error) {
+    await dialog('错误', `修改权限失败：${res.error}`);
+  } else {
+    await dialog('信息', `修改权限成功。`);
+    dialogPermissionShow.value = false;
+    userId.value = '';
+  }
+}
+
+
+</script>