我已经通过 Fetch 摆脱了 GET 和 POST 方法。但我找不到任何好的 DELETE 和 PUT 示例。
所以,我问你。您能否给出一个带有 fetch 的 DELETE 和 PUT 方法的好例子。并解释一下。
这是一个 fetch
POST
示例。您可以对 DELETE
执行相同的操作。
function createNewProfile(profile) {
const formData = new FormData();
formData.append('first_name', profile.firstName);
formData.append('last_name', profile.lastName);
formData.append('email', profile.email);
return fetch('http://example.com/api/v1/registration', {
method: 'POST',
body: formData
}).then(response => response.json())
}
createNewProfile(profile)
.then((json) => {
// handle success
})
.catch(error => error);
好的,这也是一个 fetch API 的示例
DELETE
:
fetch('https://example.com/delete-item/' + id, {
method: 'DELETE',
})
.then(res => res.text()) // or res.json()
.then(res => console.log(res))
对于 put 方法,我们有:
const putMethod = {
method: 'PUT', // Method itself
headers: {
'Content-type': 'application/json; charset=UTF-8' // Indicates the content
},
body: JSON.stringify(someData) // We send data in JSON format
}
// make the HTTP put request using fetch api
fetch(url, putMethod)
.then(response => response.json())
.then(data => console.log(data)) // Manipulate the data retrieved back, if we want to do something with it
.catch(err => console.log(err)) // Do something with the error
以某些数据为例,我们可以有一些输入字段或任何您需要的内容:
const someData = {
title: document.querySelector(TitleInput).value,
body: document.querySelector(BodyInput).value
}
在我们的
data base
中将以 json
格式显示:
{
"posts": [
"id": 1,
"title": "Some Title", // what we typed in the title input field
"body": "Some Body", // what we typed in the body input field
]
}
对于删除方法,我们有:
const deleteMethod = {
method: 'DELETE', // Method itself
headers: {
'Content-type': 'application/json; charset=UTF-8' // Indicates the content
},
// No need to have body, because we don't send nothing to the server.
}
// Make the HTTP Delete call using fetch api
fetch(url, deleteMethod)
.then(response => response.json())
.then(data => console.log(data)) // Manipulate the data retrieved back, if we want to do something with it
.catch(err => console.log(err)) // Do something with the error
在url中我们需要输入删除的id:
https://www.someapi/id
只是简单的答案。 获取删除
function deleteData(item, url) {
return fetch(url + '/' + item, {
method: 'delete'
})
.then(response => response.json());
}
这是使用 fetch API 进行 CRUD 操作的好示例:
“关于如何使用 Fetch API 执行 HTTP 请求的实用 ES6 指南”,作者:Dler Ari https://link.medium.com/4ZvwCordCW
这是我尝试 PATCH 或 PUT 的示例代码
function update(id, data){
fetch(apiUrl + "/" + id, {
method: 'PATCH',
body: JSON.stringify({
data
})
}).then((response) => {
response.json().then((response) => {
console.log(response);
})
}).catch(err => {
console.error(err)
})
对于删除:
function remove(id){
fetch(apiUrl + "/" + id, {
method: 'DELETE'
}).then(() => {
console.log('removed');
}).catch(err => {
console.error(err)
});
有关更多信息,请访问使用 Fetch - Web API | MDN https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch > Fetch_API。
一些例子:
async function loadItems() {
try {
let response = await fetch(`https://url/${AppID}`);
let result = await response.json();
return result;
} catch (err) {
}
}
async function addItem(item) {
try {
let response = await fetch("https://url", {
method: "POST",
body: JSON.stringify({
AppId: appId,
Key: item,
Value: item,
someBoolean: false,
}),
headers: {
"Content-Type": "application/json",
},
});
let result = await response.json();
return result;
} catch (err) {
}
}
async function removeItem(id) {
try {
let response = await fetch(`https://url/${id}`, {
method: "DELETE",
});
} catch (err) {
}
}
async function updateItem(item) {
try {
let response = await fetch(`https://url/${item.id}`, {
method: "PUT",
body: JSON.stringify(todo),
headers: {
"Content-Type": "application/json",
},
});
} catch (err) {
}
}
让我简化一下,你可以直接复制代码。
这是 PUT 方法:
fetch('https://reqres.in/api/users', + id {
method: 'PUT',
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify({
name: 'user'
})
})
.then(res => {
return res.json()
})
.then(data => console.log(data))
这是用于删除的:
fetch('https://reqres.in/api/users' + id, {
method: 'DELETE',
})
.then(res => {
return res.json()
})
.then(data => console.log(data))
注意:我在这里使用虚拟 api。
这就是使用 PUT 方法时对我有用的方法。这种方法允许我使用我的名字有效地更新第一项:
fetch('https://reqres.in/api/users', {
method: 'PUT',
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify({
id: 1,
first_name: 'Anthony'
})
})
.then(res => {
return res.json()
})
.then(data => console.log(data))
以下是使用 Firebase 进行 React & redux 和 ReduxThunk 的删除和放置的示例:
更新(放置):
export const updateProduct = (id, title, description, imageUrl) => {
await fetch(`https://FirebaseProjectName.firebaseio.com/products/${id}.json`, {
method: "PATCH",
header: {
"Content-Type": "application/json",
},
body: JSON.stringify({
title,
description,
imageUrl,
}),
});
dispatch({
type: "UPDATE_PRODUCT",
pid: id,
productData: {
title,
description,
imageUrl,
},
});
};
};
删除:
export const deleteProduct = (ProductId) => {
return async (dispatch) => {
await fetch(
`https://FirebaseProjectName.firebaseio.com/products/${ProductId}.json`,
{
method: "DELETE",
}
);
dispatch({
type: "DELETE_PRODUCT",
pid: ProductId,
});
};
};
const DeleteBtn = (id) => {
fetch(`http://localhost:8000/blogs/${id}`, {
method: "DELETE"
})
.then(() => {
navigate('/');
});
}
<button onClick={(event) => { DeleteBtn(blog.id)} }>delete</button>