uniapp实现本地图片上传与二进制流上传详解

export default {
	methods: {
		/**
		 * 从本地相册选择图片
		 */
		handleChooseImage() {
			uni.chooseImage({
				count: 3,
				sourceType: ['album'],
				success: res => {
					let filePath = res.tempFilePaths[0];
					// 上传图片
					this.handleUploadFile('/upload', filePath);
				}
			});
		},
		/**
		 * 上传
		 * @param {String} url 接口地址
		 * @param {String} filePath 要上传文件资源的路径
		 * @param {Object} data 接口的一些参数
		 */
		handleUploadFile(url, filePath, data) {
			uni.uploadFile({
				url: url,
				filePath,
				header: {
					"authorization": uni.getStorageSync('token')
				},
				formData: data,
				success: (uploadFileRes) => {
					console.log(uploadFileRes, '上传成功')
				},
				fail: (res) => {
					console.log(res, '上传失败')
				}
			})
		}
	}
}

export default {
	methods: {
		handleUpload() {
			// 获取二进制流（暂时用base64转二进制流测试）
			let dataurl =
				'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAADCAIAAAA7ljmRAAAAGElEQVQIW2P4DwcMDAxAfBvMAhEQMYgcACEHG8ELxtbPAAAAAElFTkSuQmCC';
			let blob = this.dataURLtoBlob(dataurl);
			this.handleUploadFile('upload', blob)
		},
		/**
		 * Base64字符串转二进制流
		 * @param {String} dataurl Base64字符串(字符串包含Data URI scheme，例如：data:image/png;base64, )
		 */
		dataURLtoBlob(dataurl) {
			var arr = dataurl.split(","),
				mime = arr[0].match(/:(.*?);/)[1],
				bstr = atob(arr[1]),
				n = bstr.length,
				u8arr = new Uint8Array(n);
			while (n--) {
				u8arr[n] = bstr.charCodeAt(n);
			}
			return new Blob([u8arr], {
				type: mime,
			});
		},
		/**
		 * 上传
		 * @param {String} url 接口地址
		 * @param {Object} file 二进制流
		 * @param {Object} data 接口的一些其他的参数
		 */
		handleUploadFile(url, file, data) {
			uni.uploadFile({
				url: url,
				file,
				header: {
					"authorization": uni.getStorageSync('token')
				},
				formData: data,
				success: (uploadFileRes) => {
					console.log(uploadFileRes, '上传成功')
				},
				fail: (res) => {
					console.log(res, '上传失败')
				}
			})
		}
	}
}