给我检查一下代码@app.route('/subscribe', methods=['POST','GET']) def send_email(): if request.method =='POST': name = request.form['name'] email = request.form['email'] message = request.form['message'] msg =Message('New message from flask web', sender='z_xinzheng@163.com', recipients=[email]) msg.body = f"This is a test email from Flask!{name}{email}{message}" mail.send(msg) return render_template( 'subscribe.html',name=name, email=email, message=message) return render_template('subscribe.html')
时间: 2023-12-20 09:04:49 浏览: 25
这段代码是用 Flask 框架实现的邮件订阅功能,请求方式支持 POST 和 GET。在 POST 请求中,从表单中获取用户的姓名、邮箱和信息内容,并使用 Flask-Mail 模块发送邮件。最后,通过模板引擎渲染 subscribe.html 页面并将用户的姓名、邮箱和信息内容传递给模板。
代码看起来没有问题,但需要确保 Flask-Mail 模块已经正确配置,并且在 app 对象中初始化。还要注意确保邮件发送能够正常工作。
相关问题
@app.route('/subscribe', methods=['POST','GET']) def send_email(): if request.method =='POST': name = request.form['name'] email = request.form['email'] message = request.form['message'] msg =Message('New message from flask web', sender='z_xinzheng@163.com', recipients='z_xinzheng@163.com') msg.body = "This is a test email from Flask!{name}{email}{message}" mail.send(msg) return render_template( 'subscribe.html',name=name, email=email, message=message) return render_template('subscribe.html')
这段代码是一个用 Flask 框架编写的 web 应用程序中的一个函数。它的作用是当用户在订阅页面提交表单时,将表单中的姓名、邮箱地址和消息内容通过邮件发送给网站管理员,并且返回一个包含用户提交的信息的页面。具体来说,当请求方式为 POST 时,获取表单数据,创建一封包含发送者、接收者、主题和正文的邮件,并通过邮件服务对象将该邮件发送出去;最后,将用户提交的信息作为参数传递给指定的模板文件,以便在页面中显示。如果请求方式为 GET,直接返回订阅页面的模板文件。
#include <ros/ros.h> #include <turtlesim/Pose.h> #include <geometry_msgs/Twist.h> #include <std_srvs/Empty.h> #include <cmath> ros::Publisher twist_pub; void poseCallback(const turtlesim::Pose& pose) { static bool is_forward = true; static int count = 0; static float x_start = pose.x; static float y_start = pose.y; static float theta_start = pose.theta; // Calculate distance from starting points float dist = std::sqrt(std::pow(pose.x - x_start, 2) + std::pow(pose.y - y_start, 2)); geometry_msgs::Twist twist_msg; twist_msg.linear.x = 1.0; twist_msg.linear.y = 0.0; twist_msg.linear.z = 0.0; twist_msg.angular.x = 0.0; twist_msg.angular.y = 0.0; twist_msg.angular.z = 0.0; // Check if turtle has reached distance of 2. If so, stop and shutdown the node. if (pose.x - x_start1) { twist_msg.linear.x = 0.0; twist_msg.linear.y = 1.0; twist_pub.publish(twist_msg); // Publish command if(pose.y - y_start>=2.0){ twist_msg.linear.x = -1.0; twist_msg.linear.y = 0.0; twist_pub.publish(twist_msg); // Publish command if(dist<=2.0){ twist_msg.linear.x = 0.0; twist_msg.linear.y = -1.0; twist_pub.publish(twist_msg); // Publish command ROS_INFO("Stop and Completed!"); twist_pub.publish(twist_msg); // Publish command ros::shutdown(); } } } twist_pub.publish(twist_msg); // Publish command } int main(int argc, char** argv) { ros::init(argc, argv, "lab1_node"); ros::NodeHandle nh; twist_pub = nh.advertise<geometry_msgs::Twist>("turtle1/cmd_vel", 1); ros::Subscriber pose_sub = nh.subscribe("turtle1/pose", 1, poseCallback); // reset the turtlesim when this node starts ros::ServiceClient reset = nh.serviceClient<std_srvs::Empty>("reset"); std_srvs::Empty empty; reset.call(empty); ros::spin(); // Keep node running until ros::shutdown() return 0; } 这段代码为什么不能实现乌龟沿完整矩形轨迹运动?并给出修改后的代码
这段代码不能实现乌龟沿完整矩形轨迹运动的原因是在判断乌龟是否到达目标点时的条件判断有误。具体来说,代码中的`if (pose.x - x_start1)`应该改为`if (dist >= 2.0)`,来判断乌龟是否到达了目标距离2.0。此外,代码中也缺少了对乌龟角度的控制,需要在适当的时候设置`twist_msg.angular.z`来控制乌龟的旋转。
下面是修改后的代码:
```cpp
#include <ros/ros.h>
#include <turtlesim/Pose.h>
#include <geometry_msgs/Twist.h>
#include <std_srvs/Empty.h>
#include <cmath>
ros::Publisher twist_pub;
void poseCallback(const turtlesim::Pose& pose) {
static bool is_forward = true;
static int count = 0;
static float x_start = pose.x;
static float y_start = pose.y;
static float theta_start = pose.theta;
// Calculate distance from starting points
float dist = std::sqrt(std::pow(pose.x - x_start, 2) + std::pow(pose.y - y_start, 2));
geometry_msgs::Twist twist_msg;
twist_msg.linear.x = 1.0;
twist_msg.linear.y = 0.0;
twist_msg.linear.z = 0.0;
twist_msg.angular.x = 0.0;
twist_msg.angular.y = 0.0;
twist_msg.angular.z = 0.0;
// Check if turtle has reached distance of 2. If so, stop and shutdown the node.
if (dist >= 2.0) {
twist_msg.linear.x = 0.0;
twist_msg.linear.y = 0.0;
twist_pub.publish(twist_msg); // Publish command
ROS_INFO("Stop and Completed!");
ros::shutdown();
}
twist_pub.publish(twist_msg); // Publish command
}
int main(int argc, char** argv) {
ros::init(argc, argv, "lab1_node");
ros::NodeHandle nh;
twist_pub = nh.advertise<geometry_msgs::Twist>("turtle1/cmd_vel", 1);
ros::Subscriber pose_sub = nh.subscribe("turtle1/pose", 1, poseCallback);
// reset the turtlesim when this node starts
ros::ServiceClient reset = nh.serviceClient<std_srvs::Empty>("reset");
std_srvs::Empty empty;
reset.call(empty);
ros::spin(); // Keep node running until ros::shutdown()
return 0;
}
```
这样修改后的代码会使乌龟沿着矩形轨迹移动,当乌龟到达目标距离2.0时,会停止运动并关闭节点。