我使用axios的基本http请求,如GET和POST,它工作得很好。现在我需要能够下载Excel文件。这在axios中可行吗?如果是,谁有一些示例代码?如果不是,我还可以在React应用程序中使用什么来做同样的事情?
当前回答
诀窍是在render()中创建一个不可见的锚标记,并添加一个React ref,允许在我们有axios响应时触发单击:
class Example extends Component {
state = {
ref: React.createRef()
}
exportCSV = () => {
axios.get(
'/app/export'
).then(response => {
let blob = new Blob([response.data], {type: 'application/octet-stream'})
let ref = this.state.ref
ref.current.href = URL.createObjectURL(blob)
ref.current.download = 'data.csv'
ref.current.click()
})
}
render(){
return(
<div>
<a style={{display: 'none'}} href='empty' ref={this.state.ref}>ref</a>
<button onClick={this.exportCSV}>Export CSV</button>
</div>
)
}
}
以下是文档:https://reactjs.org/docs/refs-and-the-dom.html。你可以在这里找到类似的想法:https://thewebtier.com/snippets/download-files-with-axios/。
其他回答
实现接收文档的Axios处理程序,数据格式为octect-stream, 数据可能看起来很奇怪PK一些JbxfFGvddvbdfbVVH34365436fdkln作为它的八字节流格式,你可能最终会创建这个数据可能被损坏的文件,{responseType: 'blob'}将数据转换为可读格式,
axios.get("URL", {responseType: 'blob'})
.then((r) => {
let fileName = r.headers['content-disposition'].split('filename=')[1];
let blob = new Blob([r.data]);
window.saveAs(blob, fileName);
}).catch(err => {
console.log(err);
});
你可能尝试过这样的解决方案, 窗口。saveAs(blob, 'file.zip')将尝试将文件保存为zip,但将不会工作,
const downloadFile = (fileData) => {
axios.get(baseUrl+"/file/download/"+fileData.id)
.then((response) => {
console.log(response.data);
const blob = new Blob([response.data], {type: response.headers['content-type'], encoding:'UTF-8'});
const link = document.createElement('a');
link.href = window.URL.createObjectURL(blob);
link.download = 'file.zip';
link.click();
})
.catch((err) => console.log(err))
}
const downloadFile = (fileData) => {
axios.get(baseUrl+"/file/download/"+fileData.id)
.then((response) => {
console.log(response);
//const binaryString = window.atob(response.data)
//const bytes = new Uint8Array(response.data)
//const arrBuff = bytes.map((byte, i) => response.data.charCodeAt(i));
//var base64 = btoa(String.fromCharCode.apply(null, new Uint8Array(response.data)));
const blob = new Blob([response.data], {type:"application/octet-stream"});
window.saveAs(blob, 'file.zip')
// const link = document.createElement('a');
// link.href = window.URL.createObjectURL(blob);
// link.download = 'file.zip';
// link.click();
})
.catch((err) => console.log(err))
}
function base64ToArrayBuffer(base64) {
var binaryString = window.atob(base64);
var binaryLen = binaryString.length;
var bytes = new Uint8Array(binaryLen);
for (var i = 0; i < binaryLen; i++) {
var ascii = binaryString.charCodeAt(i);
bytes[i] = ascii;
};
return bytes;
}
另一个简单的解决方法是,
window.open("URL")
将继续打开不必要的新选项卡,用户可能不得不让允许弹出的工作这段代码,如果用户想同时下载多个文件,所以先去解决方案或如果不尝试其他解决方案也怎么办
我有一个问题,我从axios const axiosResponse = await axios.get(pdf.url)传输到谷歌驱动器googleDrive.files。create({media: {body: axiosResponse.)data, mimeType}, requestBody: {name: fileName, parents: [parentFolder], mimeType}, auth: jwtClient})上传一个损坏的文件。
文件损坏的原因是axios转换了axiosResponse。数据转换为字符串。为了解决这个问题,我必须要求axios返回一个axios.get流。url, {responseType: 'stream'})。
这个函数将帮助您下载一个现成的xlsx, csv等文件下载。我只是从后端发送一个就绪的xlsx静态文件,它在反应。
const downloadFabricFormat = async () => {
try{
await axios({
url: '/api/fabric/fabric_excel_format/',
method: 'GET',
responseType: 'blob',
}).then((response) => {
const url = window.URL.createObjectURL(new Blob([response.data]));
const link = document.createElement('a');
link.href = url;
link.setAttribute('download', 'Fabric Excel Format.xlsx');
document.body.appendChild(link);
link.click();
});
} catch(error){
console.log(error)
}
};
这对我很管用。我在reactJS中实现了这个解决方案
const requestOptions = {`enter code here`
method: 'GET',
headers: { 'Content-Type': 'application/json' }
};
fetch(`${url}`, requestOptions)
.then((res) => {
return res.blob();
})
.then((blob) => {
const href = window.URL.createObjectURL(blob);
const link = document.createElement('a');
link.href = href;
link.setAttribute('download', 'config.json'); //or any other extension
document.body.appendChild(link);
link.click();
})
.catch((err) => {
return Promise.reject({ Error: 'Something Went Wrong', err });
})
诀窍是在render()中创建一个不可见的锚标记,并添加一个React ref,允许在我们有axios响应时触发单击:
class Example extends Component {
state = {
ref: React.createRef()
}
exportCSV = () => {
axios.get(
'/app/export'
).then(response => {
let blob = new Blob([response.data], {type: 'application/octet-stream'})
let ref = this.state.ref
ref.current.href = URL.createObjectURL(blob)
ref.current.download = 'data.csv'
ref.current.click()
})
}
render(){
return(
<div>
<a style={{display: 'none'}} href='empty' ref={this.state.ref}>ref</a>
<button onClick={this.exportCSV}>Export CSV</button>
</div>
)
}
}
以下是文档:https://reactjs.org/docs/refs-and-the-dom.html。你可以在这里找到类似的想法:https://thewebtier.com/snippets/download-files-with-axios/。