在运用ant design
开辟背景营业过程当中,遇到了给upload
组件设置背景服务器的题目。由于用习惯了七牛云的疾速易用,以及喜好它的自动紧缩接口,因而第一回响反映就是想怎样设置上传到七牛云上面。
不过经过量番征采,并没找到好的解决方案。官方引荐参考的jQuery-File-Upload服务端上传接口完成测试了几个nodejs
的完成,发明良久没有保护了,存在一些题目。因而只能从浏览ant design
源代码来看能不能怎样修正upload
的上传体式格局,从而完成提交图片过去。
首先从ant design的upload组件源码能够看到,它是基于这个upload组件编写的。再看该upload组件,获得详细的request完成:
function getError(option, xhr) {
const msg = `cannot post ${option.action} ${xhr.status}'`;
const err = new Error(msg);
err.status = xhr.status;
err.method = 'post';
err.url = option.action;
return err;
}
function getBody(xhr) {
const text = xhr.responseText || xhr.response;
if (!text) {
return text;
}
try {
return JSON.parse(text);
} catch (e) {
return text;
}
}
// option {
// onProgress: (event: { percent: number }): void,
// onError: (event: Error, body?: Object): void,
// onSuccess: (body: Object): void,
// data: Object,
// filename: String,
// file: File,
// withCredentials: Boolean,
// action: String,
// headers: Object,
// }
export default function upload(option) {
const xhr = new XMLHttpRequest();
if (option.onProgress && xhr.upload) {
xhr.upload.onprogress = function progress(e) {
if (e.total > 0) {
e.percent = e.loaded / e.total * 100;
}
option.onProgress(e);
};
}
const formData = new FormData();
if (option.data) {
Object.keys(option.data).map(key => {
formData.append(key, option.data[key]);
});
}
formData.append(option.filename, option.file);
xhr.onerror = function error(e) {
option.onError(e);
};
xhr.onload = function onload() {
// allow success when 2xx status
// see https://github.com/react-component/upload/issues/34
if (xhr.status < 200 || xhr.status >= 300) {
return option.onError(getError(option, xhr), getBody(xhr));
}
option.onSuccess(getBody(xhr), xhr);
};
xhr.open('post', option.action, true);
// Has to be after `.open()`. See https://github.com/enyo/dropzone/issues/179
if (option.withCredentials && 'withCredentials' in xhr) {
xhr.withCredentials = true;
}
const headers = option.headers || {};
// when set headers['X-Requested-With'] = null , can close default XHR header
// see https://github.com/react-component/upload/issues/33
if (headers['X-Requested-With'] !== null) {
xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
}
for (const h in headers) {
if (headers.hasOwnProperty(h) && headers[h] !== null) {
xhr.setRequestHeader(h, headers[h]);
}
}
xhr.send(formData);
return {
abort() {
xhr.abort();
},
};
}
至此上传的逻辑一览无余,那末能够怎样革新呢?再翻阅一下七牛云的文档,获得一个应用js上传的完成:
/*
* 本示例演示七牛云存储表单上传
*
* 根据以下的步骤运转示例:
*
* 1. 填写token。须要您不晓得怎样天生token,能够点击右边的链接天生,然后将结果复制粘贴过来。
* 2. 填写key。假如您在天生token的过程当中指定了key,则将其输入至此。不然留空。
* 3. 姓名是一个自定义的变量,假如天生token的过程当中指定了returnUrl和returnBody,
* 而且returnBody中指定了希冀返回此字段,则七牛会将其返回给returnUrl对应的营业服务器。
* callbackBody亦然。
* 4. 挑选恣意一张照片,然后点击提交即可
*
* 现实开辟中,您能够经由过程后端开辟言语动态天生这个表单,将token的hidden属性设置为true并对其举行赋值。
*
* **********************************************************************************
* * 孝敬代码:
* * 1. git clone git@github.com:icattlecoder/jsfiddle
* * 2. push代码到您的github库
* * 3. 测试结果,接见 http://jsfiddle.net/gh/get/jquery/1.9.1/<Your GitHub Name>/jsfiddle/tree/master/ajaxupload
* * 4. 提pr
* **********************************************************************************
*/
$(document).ready(function() {
var Qiniu_UploadUrl = "http://up.qiniu.com";
var progressbar = $("#progressbar"),
progressLabel = $(".progress-label");
progressbar.progressbar({
value: false,
change: function() {
progressLabel.text(progressbar.progressbar("value") + "%");
},
complete: function() {
progressLabel.text("Complete!");
}
});
$("#btn_upload").click(function() {
//一般上传
var Qiniu_upload = function(f, token, key) {
var xhr = new XMLHttpRequest();
xhr.open('POST', Qiniu_UploadUrl, true);
var formData, startDate;
formData = new FormData();
if (key !== null && key !== undefined) formData.append('key', key);
formData.append('token', token);
formData.append('file', f);
var taking;
xhr.upload.addEventListener("progress", function(evt) {
if (evt.lengthComputable) {
var nowDate = new Date().getTime();
taking = nowDate - startDate;
var x = (evt.loaded) / 1024;
var y = taking / 1000;
var uploadSpeed = (x / y);
var formatSpeed;
if (uploadSpeed > 1024) {
formatSpeed = (uploadSpeed / 1024).toFixed(2) + "Mb\/s";
} else {
formatSpeed = uploadSpeed.toFixed(2) + "Kb\/s";
}
var percentComplete = Math.round(evt.loaded * 100 / evt.total);
progressbar.progressbar("value", percentComplete);
// console && console.log(percentComplete, ",", formatSpeed);
}
}, false);
xhr.onreadystatechange = function(response) {
if (xhr.readyState == 4 && xhr.status == 200 && xhr.responseText != "") {
var blkRet = JSON.parse(xhr.responseText);
console && console.log(blkRet);
$("#dialog").html(xhr.responseText).dialog();
} else if (xhr.status != 200 && xhr.responseText) {
}
};
startDate = new Date().getTime();
$("#progressbar").show();
xhr.send(formData);
};
var token = $("#token").val();
if ($("#file")[0].files.length > 0 && token != "") {
Qiniu_upload($("#file")[0].files[0], token, $("#key").val());
} else {
console && console.log("form input error");
}
})
})
经由过程审视个中的中心逻辑能够晓得,*它的上传逻辑与antd 的upload组件的中心区分就是formData
增加了七牛云上传token:
formData.append('token', token);
而经由过程upload的request源码又能够晓得,能够经由过程option.data传过来的参数实行formData.append('token', token);
,该部份的源码以下:
const formData = new FormData();
if (option.data) {
Object.keys(option.data).map(key => {
formData.append(key, option.data[key]);
});
}
由此,再参阅ant design官方文档能够晓得,运用Upload
组件时,能够经由过程data API传入自定义的data,那末自此就能够获得一个简约的方法,经由过程以下sample code就能够完成Upload
组件上传图片到七牛云:
const QINIU_SERVER = 'http://up.qiniu.com'
data = {
token: 'PUT-YOUR-TOKEN-HERE',
}
<Upload
action={QINIU_SERVER}
listType="picture-card"
className="upload-list-inline"
onChange={this.onChange}
onPreview={this.handlePreview}
fileList={fileList}
data={this.data}
>
{uploadButton}
</Upload>
末了划重点:
- action=’http://up.qiniu.com‘
- data={ token: ‘PUT-YOUR-TOKEN-HERE’ }
BTW, 假如运用的是七牛云其他地区如华南地区的Bucket,须要替代运用其他地区的上传域名进action,详细可参考这里。Enjoy it!