httpd_config_t config = HTTPD_DEFAULT_CONFIG(); /* HTTPD_DEFAULT_CONFIG 扩展到一个指定的初始化器。此时,所有字段均已设置为默认值,且支持编辑:*/ config.server_port = 8081; httpd_handle_t server; esp_err_t err = httpd_start(&server, &config);详细的注释一i下这段代码
时间: 2023-11-26 17:06:23 浏览: 117
这段代码是使用ESP32的HTTP Server组件创建一个HTTP服务器并启动它。以下是对这段代码的详细注释:
```c
// 创建一个默认配置的HTTPD实例
httpd_config_t config = HTTPD_DEFAULT_CONFIG();
// 将HTTP服务器的端口设置为8081
config.server_port = 8081;
// 声明一个HTTPD实例的句柄
httpd_handle_t server;
// 启动HTTP服务器并获取HTTPD实例的句柄
esp_err_t err = httpd_start(&server, &config);
```
首先,通过 `HTTPD_DEFAULT_CONFIG()` 函数创建了一个默认配置的 `httpd_config_t` 实例,其中所有字段都已设置为默认值。然后,通过 `config.server_port = 8081` 将HTTP服务器的端口设置为 8081。
接着,声明了一个 `httpd_handle_t` 类型的变量 `server`,它将在启动HTTP服务器后保存HTTPD实例的句柄。
最后,调用 `httpd_start(&server, &config)` 函数启动HTTP服务器,并将HTTPD实例的句柄保存到 `server` 变量中。启动HTTP服务器可能会失败,因此函数的返回值 `err` 可以用于检查是否发生了错误。
相关问题
脚本部署Openstack 某企业拟使用OpenStack搭建一个企业云平台,以实现资源池化弹性管理、企业应用集中管理、统一安全认证和授权等管理。 规划: 云服务器1 主机名Controller: 接口eth33IP地址192.168.100.10/24,仅主机模式 接口eth34IP地址保持默认,NAT模式 云服务器2 主机名Compute 接口eth33IP地址192.168.100.20/24,仅主机模式 接口eth34IP地址保持默认,NAT模式 本实验使用到三个网段: 192.168.100.0/24,Openstack管理网络,Vmware仅主机模式 192.168.200.0/24,Openstack数据网络,云主机外部网络,VmwareNAT模式 10.0.0.0/24,云主机内部网络 使用两台主机部署出Openstack平台,要求云平台能够正常创建出云主机并正常通信。
以下是一个简单的脚本部署 OpenStack 的示例,您可以根据自己的实际情况进行修改和调整。本脚本适用于 CentOS 7 系统。
1. 安装必要的软件包:
```bash
yum install -y centos-release-openstack-stein
yum update -y
yum install -y python-openstackclient openstack-selinux mariadb mariadb-server rabbitmq-server memcached python-memcached httpd mod_wsgi python2-PyMySQL
```
2. 配置 MariaDB 数据库:
```bash
systemctl enable mariadb.service
systemctl start mariadb.service
# 创建数据库和用户
mysql -u root
CREATE DATABASE keystone;
GRANT ALL PRIVILEGES ON keystone.* TO 'keystone'@'localhost' IDENTIFIED BY 'KEYSTONE_DBPASS';
GRANT ALL PRIVILEGES ON keystone.* TO 'keystone'@'%' IDENTIFIED BY 'KEYSTONE_DBPASS';
FLUSH PRIVILEGES;
QUIT;
```
3. 配置 RabbitMQ 消息队列:
```bash
systemctl enable rabbitmq-server.service
systemctl start rabbitmq-server.service
rabbitmqctl add_user openstack RABBIT_PASS
rabbitmqctl set_permissions openstack ".*" ".*" ".*"
```
4. 配置 Memcached 缓存:
```bash
systemctl enable memcached.service
systemctl start memcached.service
```
5. 配置 Keystone 身份认证服务:
```bash
# 修改 /etc/keystone/keystone.conf 文件
[database]
connection = mysql+pymysql://keystone:KEYSTONE_DBPASS@controller/keystone
[token]
provider = fernet
# 初始化数据库
su -s /bin/sh -c "keystone-manage db_sync" keystone
# 创建 Fernet 密钥
keystone-manage fernet_setup --keystone-user keystone --keystone-group keystone
keystone-manage credential_setup --keystone-user keystone --keystone-group keystone
# 创建管理员账户和服务
keystone-manage bootstrap --bootstrap-password ADMIN_PASS \
--bootstrap-admin-url http://controller:5000/v3/ \
--bootstrap-internal-url http://controller:5000/v3/ \
--bootstrap-public-url http://controller:5000/v3/ \
--bootstrap-region-id RegionOne
# 设置环境变量
export OS_USERNAME=admin
export OS_PASSWORD=ADMIN_PASS
export OS_PROJECT_NAME=admin
export OS_USER_DOMAIN_NAME=Default
export OS_PROJECT_DOMAIN_NAME=Default
export OS_AUTH_URL=http://controller:5000/v3
export OS_IDENTITY_API_VERSION=3
# 创建服务和 API 端点
openstack service create --name keystone --description "OpenStack Identity" identity
openstack endpoint create --region RegionOne identity public http://controller:5000/v3/
openstack endpoint create --region RegionOne identity internal http://controller:5000/v3/
openstack endpoint create --region RegionOne identity admin http://controller:5000/v3/
```
6. 配置 Glance 镜像服务:
```bash
# 修改 /etc/glance/glance-api.conf 和 /etc/glance/glance-registry.conf 文件
[database]
connection = mysql+pymysql://glance:GLANCE_DBPASS@controller/glance
[keystone_authtoken]
auth_uri = http://controller:5000/v3
auth_url = http://controller:5000/v3
memcached_servers = controller:11211
auth_type = password
project_domain_name = Default
user_domain_name = Default
project_name = service
username = glance
password = GLANCE_PASS
[paste_deploy]
flavor = keystone
# 初始化数据库
su -s /bin/sh -c "glance-manage db_sync" glance
# 设置环境变量
export OS_USERNAME=admin
export OS_PASSWORD=ADMIN_PASS
export OS_PROJECT_NAME=admin
export OS_USER_DOMAIN_NAME=Default
export OS_PROJECT_DOMAIN_NAME=Default
export OS_AUTH_URL=http://controller:5000/v3
export OS_IDENTITY_API_VERSION=3
# 创建服务和 API 端点
openstack user create --domain default --password-prompt glance
openstack role add --project service --user glance admin
openstack service create --name glance --description "OpenStack Image" image
openstack endpoint create --region RegionOne image public http://controller:9292
openstack endpoint create --region RegionOne image internal http://controller:9292
openstack endpoint create --region RegionOne image admin http://controller:9292
```
7. 配置 Nova 计算服务:
```bash
# 修改 /etc/nova/nova.conf 文件
[database]
connection = mysql+pymysql://nova:NOVA_DBPASS@controller/nova
[api_database]
connection = mysql+pymysql://nova_api:NOVA_API_DBPASS@controller/nova_api
[keystone_authtoken]
auth_uri = http://controller:5000/v3
auth_url = http://controller:5000/v3
memcached_servers = controller:11211
auth_type = password
project_domain_name = Default
user_domain_name = Default
project_name = service
username = nova
password = NOVA_PASS
[glance]
api_servers = http://controller:9292
[oslo_concurrency]
lock_path = /var/lib/nova/tmp
# 初始化数据库
su -s /bin/sh -c "nova-manage api_db sync" nova_api
su -s /bin/sh -c "nova-manage db sync" nova
# 设置环境变量
export OS_USERNAME=admin
export OS_PASSWORD=ADMIN_PASS
export OS_PROJECT_NAME=admin
export OS_USER_DOMAIN_NAME=Default
export OS_PROJECT_DOMAIN_NAME=Default
export OS_AUTH_URL=http://controller:5000/v3
export OS_IDENTITY_API_VERSION=3
# 创建服务和 API 端点
openstack user create --domain default --password-prompt nova
openstack role add --project service --user nova admin
openstack service create --name nova --description "OpenStack Compute" compute
openstack endpoint create --region RegionOne compute public http://controller:8774/v2.1/%\(tenant_id\)s
openstack endpoint create --region RegionOne compute internal http://controller:8774/v2.1/%\(tenant_id\)s
openstack endpoint create --region RegionOne compute admin http://controller:8774/v2.1/%\(tenant_id\)s
```
8. 配置 Neutron 网络服务:
```bash
# 修改 /etc/neutron/neutron.conf 文件
[database]
connection = mysql+pymysql://neutron:NEUTRON_DBPASS@controller/neutron
[keystone_authtoken]
auth_uri = http://controller:5000/v3
auth_url = http://controller:5000/v3
memcached_servers = controller:11211
auth_type = password
project_domain_name = Default
user_domain_name = Default
project_name = service
username = neutron
password = NEUTRON_PASS
[DEFAULT]
core_plugin = ml2
service_plugins = router
allow_overlapping_ips = True
[ml2]
type_drivers = flat,vlan,vxlan
tenant_network_types = vxlan
mechanism_drivers = linuxbridge,l2population
extension_drivers = port_security
[ml2_type_flat]
flat_networks = provider
[ml2_type_vxlan]
vni_ranges = 1:1000
[securitygroup]
enable_ipset = True
[ovs]
local_ip = 192.168.100.20
bridge_mappings = provider:br-provider
# 初始化数据库
su -s /bin/sh -c "neutron-db-manage --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini upgrade head" neutron
# 设置环境变量
export OS_USERNAME=admin
export OS_PASSWORD=ADMIN_PASS
export OS_PROJECT_NAME=admin
export OS_USER_DOMAIN_NAME=Default
export OS_PROJECT_DOMAIN_NAME=Default
export OS_AUTH_URL=http://controller:5000/v3
export OS_IDENTITY_API_VERSION=3
# 创建服务和 API 端点
openstack user create --domain default --password-prompt neutron
openstack role add --project service --user neutron admin
openstack service create --name neutron --description "OpenStack Networking" network
openstack endpoint create --region RegionOne network public http://controller:9696
openstack endpoint create --region RegionOne network internal http://controller:9696
openstack endpoint create --region RegionOne network admin http://controller:9696
# 创建网络
openstack network create --share --external --provider-physical-network provider --provider-network-type flat provider
openstack subnet create --network provider --allocation-pool start=192.168.200.100,end=192.168.200.200 --dns-nameserver 223.5.5.5 --gateway 192.168.200.1 --subnet-range 192.168.200.0/24 provider
# 创建路由器和子网
openstack router create router
openstack subnet create --subnet-range 10.0.0.0/24 --network provider --gateway 10.0.0.1 provider_subnet
openstack router add subnet router provider_subnet
openstack router set --external-gateway provider router
```
9. 配置 Horizon 控制台:
```bash
# 安装 Apache 和 mod_wsgi
yum install -y httpd mod_wsgi
# 修改 /etc/openstack-dashboard/local_settings 文件
OPENSTACK_HOST = "controller"
ALLOWED_HOSTS = ['*', ]
SESSION_ENGINE = 'django.contrib.sessions.backends.cache'
CACHES = {
'default': {
'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
'LOCATION': 'controller:11211',
}
}
OPENSTACK_KEYSTONE_URL = "http://%s:5000/v3" % OPENSTACK_HOST
OPENSTACK_KEYSTONE_MULTIDOMAIN_SUPPORT = True
OPENSTACK_API_VERSIONS = {
"identity": 3,
"image": 2,
"volume": 2,
"network": 2,
}
OPENSTACK_KEYSTONE_DEFAULT_DOMAIN = "Default"
OPENSTACK_KEYSTONE_DEFAULT_ROLE = "user"
# 启动 Apache 服务
systemctl enable httpd.service
systemctl start httpd.service
```
10. 配置 Compute 节点:
```bash
# 安装必要的软件包
yum install -y centos-release-openstack-stein
yum update -y
yum install -y python-openstackclient openstack-selinux qemu-kvm libvirt libguestfs-tools virt-install bridge-utils
# 修改 /etc/nova/nova.conf 文件
[database]
connection = mysql+pymysql://nova:NOVA_DBPASS@controller/nova
[api_database]
connection = mysql+pymysql://nova_api:NOVA_API_DBPASS@controller/nova_api
[DEFAULT]
my_ip = 192.168.100.20
use_neutron = True
firewall_driver = nova.virt.firewall.NoopFirewallDriver
[vnc]
enabled = True
server_listen = 0.0.0.0
server_proxyclient_address = $my_ip
novncproxy_base_url = http://controller:6080/vnc_auto.html
[glance]
api_servers = http://controller:9292
[oslo_concurrency]
lock_path = /var/lib/nova/tmp
[neutron]
url = http://controller:9696
auth_url = http://controller:5000
auth_type = password
project_domain_name = Default
user_domain_name = Default
region_name = RegionOne
project_name = service
username = neutron
password = NEUTRON_PASS
[libvirt]
virt_type = qemu
[keystone_authtoken]
auth_uri = http://controller:5000/v3
auth_url = http://controller:5000/v3
memcached_servers = controller:11211
auth_type = password
project_domain_name = Default
user_domain_name = Default
project_name = service
username = nova
password = NOVA_PASS
# 启动服务
systemctl enable libvirtd.service openstack-nova-compute.service
systemctl start libvirtd.service openstack-nova-compute.service
```
11. 完成以上步骤后,您应该能够正常创建云主机,并能够通过网络正常访问它们。
基于ESP32-S3主板,通过ESP IDF 如何实现下面的功能 1)他会自动连接到我的wifi网络 2)这个设备只要一启动就会默认一直录像保存在SD卡。 3)我可以通过内网IP打开这个摄像头文件目录,下载他保存的录像到本地查看。 4)录制的每一个视频1小时为一段。
要在ESP32-S3主板上基于ESP-IDF实现上述功能,你需要按照以下步骤操作:
1. **自动连接WiFi:**
- 首先,添加WiFi配置库`esp_wifi`和`esp_event_loop_create_default()`函数到项目中。
- 使用`esp_event_handler_set()`设置一个WiFi事件处理器,当连接成功时执行回调函数。
```c
void wifi_connect(void *arg) {
// 连接SSID和密码,可以使用getparams()获取配置值
esp_event_loop_create_default();
esp_netif_init();
esp_event_handler_set(WIFI_EVENT_STA_START, wifi_connect_event_handler, NULL);
esp_wifi_start();
}
static esp_err_t wifi_connect_event_handler(void *ctx, system_event_t *event) {
if (event->data.sta.status == ESP_OK) {
// WiFi已连接,继续下一步操作
// 存储网络信息,如AP名称、IP等
config_ssid = ...;
config_ip = ...;
}
return ESP_OK;
}
```
2. **录像到SD卡:**
- 需要集成一个视频编码库,如ili9341库配合录屏库,或者使用第三方V4L2驱动记录视频。
- 创建定时任务,在指定时间间隔(比如每60分钟)切换到录像模式,并将数据写入SD卡。
```c
static const uint32_t RECORD_INTERVAL_MINUTES = 60; // 录像时间间隔
void start_recording(void) {
// 开启录像,设置SD卡路径和时间长度
video_recorder_start("/sd/video_%Y%m%d%H%M%S.mp4", 60*60); // 1小时录像
}
esp_timer_createXT(&timer_id, "recording_timer", start_recording, NULL, RECORD_INTERVAL_MINUTES * 1000, ESP_TIMER_TASK_TIME_QUICK);
```
3. **内网访问录像:**
- 设置UPnP或DDNS服务,以便外部设备可以通过内网IP访问摄像头。
- 使用HTTP服务器库(如esp_http_server),暴露特定的URL供客户端访问。
```c
httpd_start(config_ip, 80, "/video"); // 例如,80端口公开目录
```
4. **下载录像到本地:**
- 当用户请求下载录像时,检查是否合法并提供文件流,允许客户端进行下载。
```c
static esp_err_t handle_video_download(const char *uri_path, const char *method, esp_http_request_t *request) {
// 检查请求路径和合法性,然后返回对应的视频文件内容
if (!strstr(uri_path, "/download")) return ESP_ERR_NOT_FOUND;
// 返回文件内容给客户端,记得关闭文件描述符
FILE *file = fopen("/sd/video录像名.mp4", "rb");
if (!file) return ESP_ERR_FILE_NOT_FOUND;
send_file(request, file);
fclose(file);
return ESP_OK;
}
```
完成以上代码后,记得处理异常情况并初始化所有必要的硬件资源。注意,实际操作可能会因硬件差异和ESP-IDF版本的不同而有所调整。
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