web-development-server 相关问题

在开发时，将此标记用于与Web开发服务器相关的问题，即Web应用程序的后端/服务器端。

import express from "express"; import bodyParser from "body-parser"; import pg from "pg"; const app = express(); const port = 3000; const db = new pg.Client({ user: "postgres", host: "localhost", database: "world", password: "12345678", port: 5432, }); db.connect(); app.use(bodyParser.urlencoded({ extended: true })); app.use(express.static("public")); async function checkVisisted() { const result = await db.query("SELECT country_code FROM visited_countries"); let countries = []; result.rows.forEach((country) => { countries.push(country.country_code); }); return countries; } // GET home page app.get("/", async (req, res) => { const countries = await checkVisisted(); res.render("index.ejs", { countries: countries, total: countries.length }); }); //INSERT new country app.post("/add", async (req, res) => { const input = req.body["country"]; const result = await db.query( "SELECT country_code FROM countries WHERE country_name = $1", [input] ); if (result.rows.length !== 0) { const data = result.rows[0]; const countryCode = data.country_code; const final_data = await db.query("INSERT INTO visited_countries (country_code) VALUES ($1)", [ countryCode, ]); res.redirect("/"); } }); app.listen(port, () => { console.log(`Server running on http://localhost:${port}`); });`

node.js postgresql express web-development-server

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<form id="webjob-form" enctype="multipart/form-data"> <input type="file" id="file" name="file" required> <button type="submit">Run WebJob</button> </form> <div id="output"></div> <img id="stitched-image" style="max-width: 100%; display: none;" /> <script> document.getElementById('webjob-form').addEventListener('submit', async (e) => { e.preventDefault(); const formData = new FormData(); formData.append('file', document.getElementById('file').files[0]); const response = await fetch('<?php echo admin_url('admin-ajax.php? action=trigger_webjob'); ?>', { method: 'POST', body: formData }); const result = await response.json(); if (result.success) { // Display output or stitched image const imageUrl = result.data.match(/https:\/\/[^\s]+/)[0]; // Extract URL from response document.getElementById('stitched-image').src = imageUrl; document.getElementById('stitched-image').style.display = 'block'; } else { document.getElementById('output').innerHTML = `<pre style="color: red;">Failed: ${result.data}</pre>`; } }); </script>

php wordpress azure web-development-server

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反应被CORB（交叉读取阻塞）阻止：AppWrite +React

贝洛代码是我使用image

reactjs cors web-development-server appwrite

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如何处理用户在python中使用烧瓶登录？我正在开发带有Python烧瓶的基本Web应用程序，我正在尝试根据是否有登录用户来修改我使用的一些模板。我正在使用MongoDB来存储用户数据。下面...

auth_blueprint = Blueprint('auth', __name__, template_folder='templates') # Setup Flask-Login and Bcrypt bcrypt = Bcrypt() login_manager = LoginManager() login_manager.login_view = "auth.login" # MongoDB configuration mongo_uri = config.mongo_uri client = MongoClient(mongo_uri) db = client[config.DB_NAME] users_collection = db["users"] # User class for Flask-Login class User(UserMixin): def __init__(self, id, username, password): self.id = id self.username = username self.password = password @staticmethod def get(user_id): user_data = users_collection.find_one({"_id": user_id}) if user_data: return User(str(user_data["_id"]), user_data["username"], user_data["password"]) return None def get_id(self): return self.id @login_manager.user_loader def load_user(user_id): print(f'load_user method is called and the user_id is {user_id}') try: return User.get(user_id) except: return None @auth_blueprint.route("/register", methods=["GET", "POST"]) def register(): if request.method == "POST": username = request.form["username"] password = request.form["password"] confirmed_password = request.form["repeat-password"] if not username: flash("Please enter a username.", "danger") return redirect(url_for("auth.register")) if users_collection.find_one({"username": username}): flash("Username already exists!", "danger") return redirect(url_for("auth.register")) if not password: flash("Please enter a password.", "danger") return redirect(url_for("auth.register")) if not confirmed_password: flash("Please confirm the password.", "danger") return redirect(url_for("auth.register")) if password != confirmed_password: flash("Passwords must match!", "danger") return redirect(url_for("auth.register")) hashed_password = bcrypt.generate_password_hash(password).decode("utf-8") users_collection.insert_one({"username": username, "password": hashed_password}) flash("Registration successful!", "success") return redirect(url_for("auth.login")) return render_template("register.html") @auth_blueprint.route("/login", methods=["GET", "POST"]) def login(): if request.method == "POST": username = request.form["username"] password = request.form["password"] # Check if the user exists and credentials are valid user_data = users_collection.find_one({"username": username}) print(user_data) if user_data and bcrypt.check_password_hash(user_data["password"], password): session.clear() user = User(str(user_data['_id']), user_data['username'], user_data['password']) print(f'User id is {user.id}') result = login_user(user, remember=True, duration=timedelta(days=7), force=True) session.modified = True print(f'Is user authenticated in login function: {current_user._get_current_object().is_authenticated}') # print(f'Current user type is {type(current_user.is_authenticated)}') if result: print("Loggin successful!") #print(f"Session after login: {session}") # Inspect session object flash("Login successful!", "success") return redirect(url_for("index")) else: print("Something went wrong :(") return redirect(url_for("auth.login")) # session['username'] = user.username # if not helpers.url_has_allowed_host_and_scheme(next, request.host): # return abort(400) else: flash("Invalid credentials!", "danger") return render_template("login.html") @auth_blueprint.route("/check_login") def check_login(): print(f'Is user authenticated in check_login function: {current_user._get_current_object().is_authenticated}') print(type(current_user._get_current_object())) if current_user._get_current_object().is_authenticated: return f"User {current_user.name} is logged in." else: return "No user is logged in."

python mongodb authentication flask web-development-server

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发现语法错误“意外令牌'with'“”

来自“超级英雄”的Import超级英雄;

javascript react-native npm web-development-server npm-package

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的网关。

httpsms：

express backend sms web-development-server sms-gateway

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从默认表格中满足邮政请求时，“ res.send”在哪里？

llet说我有一个格式（用JSX编写）发送到Express服务器： <form id="log-in-form-itself" action="/submit-form" method="post"> <label htmlFor="username" >Username</label> <input type="text" id="username" name="username" required></input> <label htmlFor="password">Password</label> <input type="password" id="password" name="password" required></input> <button id="log-in-button">Log In</button> </form> 我知道该表格将使用“/提交形式”路线进入服务器。该路线将在Express这样处理： app.post("/submit-form", (req, res) => { //some form processing. Doesn't matter. res.send("some value"); }); 我的问题是，如何在我的前端代码中访问“ res.send（）”的值？这不是一个普通的获取请求，我可以使用响应对象。邮政请求本身以形式嵌入，那么我如何访问其响应？为了清楚起见，我正在为前端进行反应，并为后端表达。回答您的问题： “ res.send”从默认表格内完成邮政请求时，“ res.send”在哪里？” 它通过HTTP响应返回到浏览器，这在后端上生成的所有内容（在您的情况下是通过Express），并通过res.send命令发送。除非您使用JS处理表单请求，否则您无法动态处理此响应。本地HTML表单提交，意味着您正在执行HTTP POST请求，并从后端获得某种资源。

reactjs node.js express backend web-development-server

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如何修复 Next.js 应用程序在成功调用 API 后不呈现动态内容？

我有一个 Next.js 应用程序，它在 getServerSideProps 中进行 API 调用以获取一些动态数据，然后将其呈现在页面上。然而API调用成功后，内容却不是

reactjs next.js server-side-rendering web-development-server

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Python“忘记”变量？（Web 服务器上下文中的请求之间）

我正在开发一个项目，其核心是运行远程监控类型网站的服务器，以通过 LTE 监控汽车上单独仪表板系统的一些数据。汽车将发送其速度和

python flask nginx gunicorn web-development-server

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Python“忘记”变量？

我正在开发一个项目，其核心是运行远程监控类型网站的服务器，以通过 LTE 监控汽车上单独仪表板系统的一些数据。汽车将发送其速度和