我知道使用新的Fetch API(此处使用ES2017的async
/ await
),您可以像这样发出GET请求:
async getData() {
try {
let response = await fetch('https://example.com/api');
let responseJson = await response.json();
console.log(responseJson);
} catch(error) {
console.error(error);
}
}
但是你如何发出POST请求?
答案 0 :(得分:47)
长话短说,Fetch还允许您传递一个对象以获得更个性化的请求:
1. User has_many requests (with column requests.user_id)
2. Request has_one user(with column requests.agent_id)
查看获取文档,了解更多好东西和陷阱:
https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch
请注意,由于您正在执行异步尝试/捕获模式,因此您只需省略我示例中的fetch("http://example.com/api/endpoint/", {
method: "post",
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
},
//make sure to serialize your JSON body
body: JSON.stringify({
name: myName,
password: myPassword
})
})
.then( (response) => {
//do something awesome that makes the world a better place
});
函数;)
答案 1 :(得分:6)
如果你想发一个简单的帖子请求而不用JSON发送数据。
fetch("/url-to-post",
{
method: "POST",
// whatever data you want to post with a key-value pair
body: "name=manas&age=20",
headers:
{
"Content-Type": "application/x-www-form-urlencoded"
}
}).then((response) =>
{
// do something awesome that makes the world a better place
});
答案 2 :(得分:1)
将表单数据发布到PHP脚本的最佳方法是Fetch API。这是一个示例:
function postData() {
const form = document.getElementById('form');
const data = new FormData();
data.append('name', form.name.value);
fetch('../php/contact.php', {method: 'POST', body: data}).then(response => {
if (!response.ok){
throw new Error('Network response was not ok.');
}
}).catch((err) => {
console.log(err);
});
}
<form id="form" action="javascript:postData()">
<input id="name" name="name" placeholder="Name" type="text" required>
<input type="submit" value="Submit">
</form>
这是一个PHP脚本的非常基本的示例,该脚本获取数据并发送电子邮件:
<?php
header('Content-type: text/html; charset=utf-8');
if (isset($_POST['name'])) {
$name = $_POST['name'];
}
$to = "test@example.com";
$subject = "New name submitted";
$body = "You received the following name: $name";
mail($to, $subject, $body);
答案 3 :(得分:1)
这是使用带有异步/等待功能的节点获取的POST请求的解决方案。
async function post(data) {
try {
// Create request to api service
const req = await fetch(`http://127.0.0.1/api`, {
method: 'POST',
headers: { 'Content-Type':'application/json' },
// format the data
body: JSON.stringify({
id: data.id,
foo: data.foo,
bar: data.bar
}),
});
const res = await req.json();
// Log success message
console.log(res);
}catch(err) {
console.error(`ERROR: err`);
}
}
// Call your function
post() // with your parameter ofCourse
答案 4 :(得分:0)
这是一个完整的示例:花了几个小时修改不完整的代码片段后,我终于设法从javascript中发布了一些json,在服务器上使用php将其提取,添加了数据字段,并最终更新了原始网页。这是HTML,PHP和JS。感谢所有在此处发布原始代码片段的人。此处类似的代码在线:https://www.nbest.co.uk/Fetch/index.php
<!DOCTYPE HTML>
<!-- Save this to index.php and view this page in your browser -->
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Javascript Fetch Example</title>
</head>
<body>
<h1>Javascript Fetch Example</h1>
<p>Save this to index.php and view this page in your browser.</p>
<button type="button" onclick="myButtonClick()">Press Me</button>
<p id="before">This is the JSON before the fetch.</p>
<p id="after">This is the JSON after the fetch.</p>
<script src="fetch.js"></script>
</body>
</html>
<!-- --------------------------------------------------------- -->
// Save this as fetch.js --------------------------------------------------------------------------
function success(json) {
document.getElementById('after').innerHTML = "AFTER: " + JSON.stringify(json);
console.log("AFTER: " + JSON.stringify(json));
} // ----------------------------------------------------------------------------------------------
function failure(error) {
document.getElementById('after').innerHTML = "ERROR: " + error;
console.log("ERROR: " + error);
} // ----------------------------------------------------------------------------------------------
function myButtonClick() {
var url = 'json.php';
var before = {foo: 'Hello World!'};
document.getElementById('before').innerHTML = "BEFORE: " + JSON.stringify(before);
console.log("BEFORE: " + JSON.stringify(before));
fetch(url, {
method: 'POST',
body: JSON.stringify(before),
headers:{
'Content-Type': 'application/json'
}
}).then(res => res.json())
.then(response => success(response))
.catch(error => failure(error));
} // ----------------------------------------------------------------------------------------------
<?php
// Save this to json.php ---------------------------------------
$contentType = isset($_SERVER["CONTENT_TYPE"]) ? trim($_SERVER["CONTENT_TYPE"]) : '';
if ($contentType === "application/json") {
$content = trim(file_get_contents("php://input"));
$decoded = json_decode($content, true);
$decoded['bar'] = "Hello World AGAIN!"; // Add some data to be returned.
$reply = json_encode($decoded);
}
header("Content-Type: application/json; charset=UTF-8");
echo $reply;
// -------------------------------------------------------------
?>
答案 5 :(得分:0)
2021 答案:以防万一您登陆这里寻找与 axios 相比如何使用 async/await 或 promise 发出 GET 和 POST Fetch api 请求。
我使用 jsonplaceholder fake API 来演示:
使用 async/await 获取 api GET 请求:
const asyncGetCall = async () => {
try {
const response = await fetch('https://jsonplaceholder.typicode.com/posts');
const data = await response.json();
// enter you logic when the fetch is successful
console.log(data);
} catch(error) {
// enter your logic for when there is an error (ex. error toast)
console.log(error)
}
}
asyncGetCall()
使用 async/await 获取 api POST 请求:
const asyncPostCall = async () => {
try {
const response = await fetch('https://jsonplaceholder.typicode.com/posts', {
method: 'POST',
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify({
// your expected POST request payload goes here
title: "My post title",
body: "My post content."
})
});
const data = await response.json();
// enter you logic when the fetch is successful
console.log(data);
} catch(error) {
// enter your logic for when there is an error (ex. error toast)
console.log(error)
}
}
asyncPostCall()
使用 Promise 的 GET 请求:
fetch('https://jsonplaceholder.typicode.com/posts')
.then(res => res.json())
.then(data => {
// enter you logic when the fetch is successful
console.log(data)
})
.catch(error => {
// enter your logic for when there is an error (ex. error toast)
console.log(error)
})
使用 Promise 的 POST 请求:
fetch('https://jsonplaceholder.typicode.com/posts', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({
// your expected POST request payload goes here
title: "My post title",
body: "My post content."
})
})
.then(res => res.json())
.then(data => {
// enter you logic when the fetch is successful
console.log(data)
})
.catch(error => {
// enter your logic for when there is an error (ex. error toast)
console.log(error)
})
使用 Axios 的 GET 请求:
const axiosGetCall = async () => {
try {
const { data } = await axios.get('https://jsonplaceholder.typicode.com/posts')
// enter you logic when the fetch is successful
console.log(`data: `, data)
} catch (error) {
// enter your logic for when there is an error (ex. error toast)
console.log(`error: `, error)
}
}
axiosGetCall()
使用 Axios 的 POST 请求:
const axiosPostCall = async () => {
try {
const { data } = await axios.post('https://jsonplaceholder.typicode.com/posts', {
// your expected POST request payload goes here
title: "My post title",
body: "My post content."
})
// enter you logic when the fetch is successful
console.log(`data: `, data)
} catch (error) {
// enter your logic for when there is an error (ex. error toast)
console.log(`error: `, error)
}
}
axiosPostCall()