272 lines
8.9 KiB
JavaScript
272 lines
8.9 KiB
JavaScript
/**
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* MinIO 文件上传工具
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* 使用 AWS Signature V4 签名，通过 uni.request PUT 直传到 MinIO
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*
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* 签名算法与 curl/fetch 完全一致：
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* SignedHeaders=content-type;host;x-amz-content-sha256;x-amz-date
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* x-amz-content-sha256 = 实际文件内容sha256
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*/
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import sha256 from 'js-sha256'
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// ====== MinIO 配置 ======
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const CFG = {
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endpoint: 'shxy.image.yushutx.com',
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accessKey: 'minioadmin',
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secretKey: 'minioadmin',
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bucket: 'scan-book',
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region: 'us-east-1',
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protocol: 'https'
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}
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// ====== 工具函数 ======
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function pad(n) {
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return n < 10 ? '0' + n : '' + n
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}
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function hexToBytes(hex) {
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const bytes = []
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for (let i = 0; i < hex.length; i += 2) {
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bytes.push(parseInt(hex.substring(i, i + 2), 16))
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}
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return new Uint8Array(bytes)
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}
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function bytesToHex(bytes) {
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return Array.from(bytes).map(function (b) { return (b >> 4).toString(16) + (b & 0xf).toString(16) }).join('')
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}
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function hmacRaw(key, msg) {
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return hexToBytes(sha256.hmac(key, msg))
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}
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function getSignatureKey(secretKey, dateStamp, region, service) {
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var k = hmacRaw('AWS4' + secretKey, dateStamp)
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k = hmacRaw(k, region)
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k = hmacRaw(k, service)
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return hmacRaw(k, 'aws4_request')
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}
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function sha256Hex(str) {
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return sha256(str)
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}
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function sha256Bytes(bytes) {
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return sha256(bytes)
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}
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// ====== 时间同步 ======
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var _timeOffset = 0
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var _timeSyncing = false
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function syncServerTime() {
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return new Promise(function (resolve) {
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if (_timeSyncing) {
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setTimeout(function () { resolve(new Date(Date.now() + _timeOffset)) }, 500)
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return
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}
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_timeSyncing = true
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uni.request({
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url: CFG.protocol + '://' + CFG.endpoint + '/',
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method: 'PUT',
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success: function (res) {
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var d = res.header ? (res.header.Date || res.header.date) : null
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d = d || (res.headers ? (res.headers.Date || res.headers.date) : null)
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if (d) {
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var ms = new Date(d).getTime()
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if (ms) {
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_timeOffset = ms - Date.now()
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}
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}
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_timeSyncing = false
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resolve(new Date(Date.now() + _timeOffset))
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},
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fail: function () {
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_timeSyncing = false
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resolve(new Date())
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}
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})
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})
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}
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// ====== AWS V4 签名 ======
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function buildAuthHeader(objectKey, date, contentType, contentSha256) {
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var dateStr = date.getFullYear() + pad(date.getMonth() + 1) + pad(date.getDate())
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var amzDate = dateStr + 'T' + pad(date.getHours()) + pad(date.getMinutes()) + pad(date.getSeconds()) + 'Z'
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var host = CFG.endpoint
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var canonicalUri = '/' + CFG.bucket + '/' + objectKey
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var signedHeadersList = ['content-type', 'host', 'x-amz-content-sha256', 'x-amz-date']
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var canonicalHeaders =
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'content-type:' + contentType + '\n' +
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'host:' + host + '\n' +
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'x-amz-content-sha256:' + contentSha256 + '\n' +
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'x-amz-date:' + amzDate + '\n'
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var signedHeadersStr = signedHeadersList.join(';')
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var canonicalRequest =
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'PUT\n' + canonicalUri + '\n\n' + canonicalHeaders + signedHeadersStr + '\n' + contentSha256
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var credentialScope = dateStr + '/' + CFG.region + '/s3/aws4_request'
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var stringToSign = 'AWS4-HMAC-SHA256\n' + amzDate + '\n' + credentialScope + '\n' + sha256Hex(canonicalRequest)
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var signingKey = getSignatureKey(CFG.secretKey, dateStr, CFG.region, 's3')
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var signature = bytesToHex(hmacRaw(signingKey, stringToSign))
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var authHeader = 'AWS4-HMAC-SHA256 Credential=' + CFG.accessKey + '/' + credentialScope +
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', SignedHeaders=' + signedHeadersStr + ', Signature=' + signature
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return { authHeader: authHeader, amzDate: amzDate }
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}
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// ====== 文件读取（先读base64再转Uint8Array用于计算sha256） ======
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function readFileAsBase64(filePath) {
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return new Promise(function (resolve, reject) {
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// uni-app 标准 API
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try {
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var fs = uni.getFileSystemManager()
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if (fs && fs.readFile) {
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fs.readFile({
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filePath: filePath,
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encoding: 'base64',
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success: function (res) { resolve(res.data) },
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fail: function () {
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// 回退到 plus.io
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if (typeof plus !== 'undefined' && plus.io && plus.io.FileReader) {
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readViaPlus(filePath, resolve, reject)
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} else {
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reject(new Error('无法读取文件'))
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}
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}
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})
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} else if (typeof plus !== 'undefined' && plus.io && plus.io.FileReader) {
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readViaPlus(filePath, resolve, reject)
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} else {
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reject(new Error('当前环境不支持文件读取'))
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}
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} catch (e) {
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reject(new Error('读取文件异常: ' + e.message))
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}
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})
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}
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function readViaPlus(filePath, resolve, reject) {
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plus.io.resolveLocalFileSystemURL(filePath, function (entry) {
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entry.file(function (file) {
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var reader = new plus.io.FileReader()
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reader.onloadend = function (e) {
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var data = e.target.result
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if (data.indexOf(',') > -1) data = data.split(',')[1]
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resolve(data)
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}
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reader.onerror = function () { reject(new Error('FileReader失败')) }
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reader.readAsDataURL(file)
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}, function () { reject(new Error('获取文件对象失败')) })
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}, function () { reject(new Error('resolveLocalFileSystemURL失败')) })
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}
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function base64ToBytes(base64) {
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// 手动解码 base64 到 Uint8Array（避免 atob 兼容问题）
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var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
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base64 = base64.replace(/=+$/, '')
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var bytes = []
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for (var i = 0; i < base64.length; i += 4) {
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var a = chars.indexOf(base64[i])
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var b = chars.indexOf(base64[i + 1])
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var c = chars.indexOf(base64[i + 2])
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var d = chars.indexOf(base64[i + 3])
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bytes.push((a << 2) | (b >> 4))
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if (c >= 0) bytes.push(((b & 0xf) << 4) | (c >> 2))
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if (d >= 0) bytes.push(((c & 3) << 6) | d)
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}
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return bytes
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}
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// ====== 上传 ======
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/**
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* 使用 uni.request 上传单张图片到 MinIO（与 fetch 示例等价）
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*/
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export function uploadImage(filePath, typeDir) {
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if (typeDir === undefined) typeDir = 'Isbn'
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return new Promise(function (resolve, reject) {
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// 第一步：同步服务器时间
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syncServerTime().then(function (serverDate) {
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// 第二步：读取文件
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readFileAsBase64(filePath).then(function (base64) {
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// 解码为二进制字节数组
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var fileBytes = base64ToBytes(base64)
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var fileByteArray = new Uint8Array(fileBytes)
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// 计算文件内容的 SHA256（使用整数数组避免 to UTF-8 的问题）
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var fileSha256 = sha256Bytes(fileBytes)
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// 构建对象路径
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var now = serverDate
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var datePath = now.getFullYear() + '-' + pad(now.getMonth() + 1) + '-' + pad(now.getDate())
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var ext = (filePath.match(/\.(\w+)$/) || [])[1] || 'jpg'
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ext = ext.toLowerCase()
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var objectKey = datePath + '/' + typeDir + '/' + 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
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var r = Math.random() * 16 | 0
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return (c === 'x' ? r : (r & 0x3 | 0x8)).toString(16)
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}) + '.' + ext
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var contentTypeMap = { jpg: 'image/jpeg', jpeg: 'image/jpeg', png: 'image/png', gif: 'image/gif', webp: 'image/webp', bmp: 'image/bmp' }
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var contentType = contentTypeMap[ext] || 'image/jpeg'
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// 构建签名（使用实际文件sha256）
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var sig = buildAuthHeader(objectKey, now, contentType, fileSha256)
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var url = CFG.protocol + '://' + CFG.endpoint + '/' + CFG.bucket + '/' + objectKey
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console.log('【MinIO上传】URL:', url)
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console.log('【MinIO上传】contentType:', contentType)
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console.log('【MinIO上传】contentLength:', fileByteArray.length)
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console.log('【MinIO上传】x-amz-content-sha256:', fileSha256)
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// 第三步：使用 uni.request PUT 上传（与 fetch 完全一致）
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uni.request({
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url: url,
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method: 'PUT',
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header: {
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'Content-Type': contentType,
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'X-Amz-Content-Sha256': fileSha256,
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'X-Amz-Date': sig.amzDate,
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'Authorization': sig.authHeader
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},
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data: fileByteArray.buffer,
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success: function (res) {
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if (res.statusCode === 200) {
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console.log('【MinIO上传】成功:', url)
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resolve(url)
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} else {
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console.error('【MinIO上传】失败, HTTP:', res.statusCode, JSON.stringify(res.data))
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reject(new Error('上传失败: HTTP ' + res.statusCode))
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}
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},
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fail: function (err) {
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console.error('【MinIO上传】网络错误:', JSON.stringify(err))
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reject(new Error('上传网络错误'))
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}
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})
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}).catch(function (err) { reject(err) })
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}).catch(function (err) { reject(err) })
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})
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}
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export function uploadImages(filePaths, typeDir) {
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if (typeDir === undefined) typeDir = 'Isbn'
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var tasks = []
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for (var i = 0; i < filePaths.length; i++) {
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tasks.push(uploadImage(filePaths[i], typeDir))
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}
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return Promise.all(tasks)
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}
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export default { uploadImage, uploadImages }
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