如何用dw做网站框架网站内容优化关键词布局

此处后端使用的是前期封装的自定义starter，具体链接可参考：minio对象存储spring boot starter封装组件
这里主要针对前期封装的组件，做一个简单的应用，前端直传可查看之前的文章

秒传

秒传的逻辑比较简单，在前传上传之前，先获取到对应文件的md5，传给后端，后端校验md5是否已经存在，存在则直接提示上传成功，否则，发起文件上传请求

获取文件MD5，前端可以使用spark-md5或者crypto-js

<el-upload class="upload-demo" drag action="#" :http-request="sparkUploadHandle" :show-file-list="false"><el-icon class="el-icon--upload"><UploadFilled /></el-icon><div class="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>
</el-upload>

对应的处理逻辑

<script setup lang="ts">
import { ElMessage } from 'element-plus'
import SparkMD5 from 'spark-md5'
import { checkMd5 } from '@/api/file'
import { UploadFilled } from '@element-plus/icons-vue'const sparkUploadHandle = (param: any) => {const file = param.fileconst fileReader = new FileReader()const Spark = new SparkMD5.ArrayBuffer()fileReader.readAsArrayBuffer(file)fileReader.onload = function (e) {Spark.append(e.target.result)const md5 = Spark.end()ElMessage.success('文件MD5：' + md5)//上传逻辑处理const data = {md5: md5,fileName: file.name}checkMd5(data).then(resp => {if (resp.code == 201) {ElMessage.success('秒传成功')} else {ElMessage.info('后台无数据，正在上传中....')//请求上传接口}})}
}
</script>

checkMd5就是请求后端接口，查看是否存在

分片上传

这里使用的是前端直传方式的分片上传，处理逻辑：前端根据指定的大小对文件进行分片，分片完成后，根据文件名和分片数量去请求后端，获得对应的分片上传地址集合，再根据返回的地址集合，进行前端直传，传完后，调用后端接口，合并分片

后端接口

后端拿到对应的文件名称，分片大小和文件类型，然后返回给前端对应的put直传地址集合，每个直传地址默认10分钟的有效期

    @Autowiredprivate MinioService minioService;@GetMapping("/part-url")public RestResult<MultiPartUploadInfo> partUrl(@RequestParam String fileName,@RequestParam int partSize, @RequestParam String contentType) throws MinioException {MultiPartUploadInfo uploadInfo = minioService.initMultiPartUploadId("bucketName", fileName, partSize, contentType);return RestResult.ok(uploadInfo);}@GetMapping("/merge-part")public RestResult<String> mergePart(@RequestParam String fileName, @RequestParam String uploadId) throws MinioException {String merge = minioService.mergeMultiPartUpload("bucketName", fileName, uploadId);return RestResult.ok(merge);}

前端

<el-upload class="upload-demo" drag action="#" :http-request="partUploadHandle" :show-file-list="false"><el-icon class="el-icon--upload"><UploadFilled /></el-icon><div class="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>
</el-upload>

import { reactive } from 'vue'
import service from '@/utils/request'
import { getPartUrl, mergePart } from '@/api/file'
import { UploadFilled } from '@element-plus/icons-vue'const state = reactive({uploadId: ''
})
//分片大小
const chunkSize = 50 * 1024 * 1024const partUploadHandle = (param: any) => {let file = param.file// 正在创建分片let fileChunks = createFileChunk(file)let data = {fileName: file.name,partSize: fileChunks.length,contentType: file.type}//获得上传的urlgetPartUrl(data).then(resp => {state.uploadId = resp.data.uploadIdlet uploadUrls = resp.data.uploadUrlsif (fileChunks.length !== uploadUrls.length) {ElMessage.error('文件分片上传地址获取错误')return}let chunkList = []fileChunks.map((chunkItem, index) => {chunkList.push({chunkNumber: index + 1,chunk: chunkItem,uploadUrl: uploadUrls[index],progress: 0,status: '—'})})//上传分片uploadChunkBase(chunkList, file.type).then(resp => {console.log('分片上传完成')let par = {fileName: file.name,uploadId: state.uploadId}//请求后端合并分片mergePart(par).then(resp => {ElMessage.info('上传成功，访问地址：' + resp.data)})})})
}/*** 文件分片*/
const createFileChunk = (file, size = chunkSize) => {const fileChunkList = []let count = 0while (count < file.size) {fileChunkList.push({file: file.slice(count, count + size)})count += size}return fileChunkList
}
//分片上传
const uploadChunkBase = (chunkList, contentType = 'application/octet-stream') => {let successCount = 0let totalChunks = chunkList.lengthreturn new Promise<void>((resolve, reject) => {const handler = () => {if (chunkList.length) {const chunkItem = chunkList.shift()// 直接上传二进制，不需要构造 FormData，否则上传后文件损坏service.put(chunkItem.uploadUrl, chunkItem.chunk.file, {headers: {'Content-Type': contentType}}).then(response => {if (response.status === 200) {console.log('分片：' + chunkItem.chunkNumber + ' 上传成功')successCount++// 继续上传下一个分片handler()} else {// 注意：这里没有针对失败做处理，请根据自己需求修改console.log('上传失败：' + response.status + '，' + response.statusText)}}).catch(error => {// 更新状态console.log('分片：' + chunkItem.chunkNumber + ' 上传失败，' + error)// 重新添加到队列中chunkList.push(chunkItem)handler()})}if (successCount >= totalChunks) {resolve()}}// 支持10个并发for (let i = 0; i < 10; i++) {handler()}})
}

utils/request是对axios的封装，比如超时，返回体错误码判断等等

对应的 api/file.ts

import service from '@/utils/request'/** MD5校验 */
export const checkMd5 = (params?: object) => {return service.get('/oss/check', { params: params })
}/** 获取分片上传地址 */
export const getPartUrl = (params?: object) => {return service.get('/oss/part-url', { params: params })
}/** 分片合并 */
export const mergePart = (params?: object) => {return service.get('/oss/merge-part', { params: params, timeout: 10000 })
}

至此，分片上传即可使用

断点续传

这个其实就是在分片上传的基础做一个改进，将上传完成的分片反馈给后端做记录，再次续传时，只传对应的未上传分片即可，上传完成，再请求后端合并。