vue3+vite使用vue-pdf-embed或者pdf-vue3预览 PDF 文件（能躲避 XSS 攻击，需要 pdf 文件的 base64 或者字节数组形式）

1.使用vue-pdf-embed

1.npm 安装所需插件

npm i vue-pdf-embed@1.2.1
npm i vue3-pdfjs@0.1.6

2.封装组件（创建pdfPriview.index 文件）

<template>
  <div class="pdf-preview">
	<vue-pdf-embed
	  :source="state.source"
	  v-for="page in state.numPages"
	  :page="page"
	  :key="page"
	  textLayer
	></vue-pdf-embed>
  </div>
</template>
<script setup lang="ts">
import { reactive, onMounted, computed, ref } from 'vue';
import VuePdfEmbed from 'vue-pdf-embed';
import { createLoadingTask } from 'vue3-pdfjs';
import { getFileInfoIO } from '@/api/file/index';

const props = defineProps({
  pdfUrl: {
	type: String
  },
  pdfId: {
	type: Number
  }
});

const state = reactive({
  source: undefined,
  pageNum: 1,
  scale: 1, // 缩放比例
  numPages: 0 // 总页数
});

onMounted(() => {
  if (props.pdfId) {
	getFileInfoIO(props.pdfId)
	  .then((fileInfoRes) => {
		const binaryString = atob(fileInfoRes?.data);
		const bytes = new Uint8Array(binaryString.length);
		for (let i = 0; i < binaryString.length; i++) {
		  bytes[i] = binaryString.charCodeAt(i);
		}
		const blob = new Blob([bytes], { type: 'application/octet-stream' });
		const fileStream = URL.createObjectURL(blob);
		console.log('fileStream', fileStream);
		state.source = fileStream;
		const loadingTask = createLoadingTask(fileStream);
		loadingTask.promise.then((pdf: { numPages: number }) => {
		  state.numPages = pdf.numPages;
		});
	  })
	  .catch(() => {});
  }
});
</script>
<style lang="css" scoped>
.vue-pdf-embed {
  text-align: center;
  width: 515px;
  margin: 0 auto;
  box-sizing: border-box;
}

.pdf-preview {
  position: relative;
  height: 70vh !important;
  padding: 20px 0;
  box-sizing: border-box;
  background-color: e9e9e9;
}
.pdf-wrap {
  overflow-y: auto;
}
.vue-pdf-embed {
  text-align: center;
  width: 515px;
  margin: 0 auto;
  box-sizing: border-box;
}

.page-tool {
  position: absolute;
  bottom: 35px;
  padding-left: 15px;
  padding-right: 15px;
  display: flex;
  align-items: center;
  color: white;
  border-radius: 19px;
  z-index: 100;
  cursor: pointer;
  margin-left: 50%;
  transform: translateX(-50%);
}
.page-tool-item {
  padding: 8px 15px;
  padding-left: 10px;
  cursor: pointer;
}

body {
  padding: 16px;
  background-color: #ccc;
}

.vue-pdf-embed {
  margin: 0 auto;
}

.vue-pdf-embed__page {
  margin-bottom: 8px;
  box-shadow: 0 2px 8px 4px rgba(0, 0, 0, 0.1);
}
</style>

3.如何使用

import PdfPreview from '@/components/pdfPreview/index.vue';
<PdfPreview
  v-else-if="fileType == 'pdf'"
  :pdfId="previewOption.uid"
  :key="previewOption.uid"
></PdfPreview>

2.使用 pdf-vue3

1.npm 插件安装

npm i pdf-vue3@1.0.12

2.封装组件

<template>
  <div class="box" style="height: 70vh">
	<PDF :src="state.source" style="height: 70vh" />
  </div>
</template>

<script setup lang="ts">
import { reactive, onMounted, computed } from 'vue';
import { getFileInfoIO } from '/@/api/file/index';
import PDF from 'pdf-vue3';

const props = defineProps({
  pdfUrl: {
	type: String,
	default: '',
  },
  pdfId: {
	type: Number,
	default: '',
  },
});

const state = reactive({
  source: undefined,
  pageNum: 1,
  numPages: 1, // 总页数
});

onMounted(() => {
  if (props.pdfId) {
	try {
	  getFileInfoIO(props.pdfId)
		.then((fileInfoRes) => {
		  if (fileInfoRes && fileInfoRes.data) {
			state.source = fileInfoRes.data;
		  } else {
			console.error('fileInfoRes 或 fileInfoRes.data 为空');
		  }
		})
		.catch(() => {});
	} catch (error) {
	  console.log('vue-pdf-embed', error);
	}
  }
});
</script>

<style lang="less" scoped></style>

3.如何使用

import PdfPreview from '/@/components/pdfPreview/index.vue';
<PdfPreview
  v-else-if="fileType == 'pdf'"
  :pdfId="previewOption.uid"
  :key="previewOption.uid"
></PdfPreview>

注意：本组件是后端给了个 文件 id 接口，返回文件的 base64。