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[英]Cant make a fetch post request from front end client to local node server, only GET requests work
[英]How to make POST request via fetch API with local client and server?
我通過webpack和express運行兩個獨立的服務器; 開發服務器和客戶端服務器
我在客戶端上有一個按鈕,我想在按鈕點擊時向服務器發送POST請求。 我使用https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch中的示例創建請求
const testButton = document.querySelector(`button.test`);
const sendRequest = event => {
event.preventDefault(); //stop or prevents the browser from executing the default action
postData(`http://localhost:8080/`, { answer: 42 }) // line:32
.then(data => console.log(JSON.stringify(data))) // JSON-string from `response.json()` call , line:33
.catch(error => console.error(error));
function postData(url = ``, data = {}) {
// Default options are marked with *
return fetch(url, { // line:38
method: 'POST', // *GET, POST, PUT, DELETE, etc.
mode: 'no-cors', // no-cors, cors, *same-origin
cache: 'no-cache', // *default, no-cache, reload, force-cache, only-if-cached
credentials: 'same-origin', // include, *same-origin, omit
headers: {
'Content-Type': 'application/json',
// "Content-Type": "application/x-www-form-urlencoded",
},
redirect: 'follow', // manual, *follow, error
referrer: 'no-referrer', // no-referrer, *client
body: JSON.stringify(data), // body data type must match "Content-Type" header
});
// .then(response => response.json()); // parses JSON response into native Javascript objects
}
console.log(`sends POST request from here`);
};
testButton.addEventListener(`click`, sendRequest);
當我點擊按鈕時,我收到此錯誤:
sends POST request from here // console.log message in request
POST http://localhost:8080/ 404 (Not Found)
postData @ index.js:38
sendRequest @ index.js:32
index.js:33 {}
package.json中的腳本
"scripts": {
"start": "webpack",
"dev-server": "nodemon bin/dev localhost 8080",
"dev-client": "webpack-dev-server --port 3000"
}
webpack.config.js中的devServer
devServer: {
historyApiFallback: true,
hot: true,
inline: true,
host: 'localhost',
port: 3000,
proxy: {
'/api/': 'http://localhost:8080',
}
},
我試過這個代理
proxy: {
'^/api/*': {
target: 'http://localhost:8080/api/',
secure: false
}
}
您的請求代碼乍一看似乎很好。
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