forked from lxm_tools/flutter-picgo
32 lines
1.2 KiB
Dart
32 lines
1.2 KiB
Dart
import 'dart:convert';
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import 'package:crypto/crypto.dart';
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class QiniuApi {
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static const String BASE_URL = '';
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/// 上传凭证算法
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/// https://developer.qiniu.com/kodo/manual/1208/upload-token
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/// https://pub.flutter-io.cn/packages/crypto
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static String generateUpToken(
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String accessKey, String secretKey, String putPolicy) {
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//对 JSON 编码的上传策略进行URL 安全的 Base64 编码，得到待签名字符串：
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var encodedPutPolicy = base64Encode(utf8.encode(putPolicy));
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// 使用访问密钥（AK/SK）对上一步生成的待签名字符串计算HMAC-SHA1签名：
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var hmacsha1 = Hmac(sha1, utf8.encode(secretKey));
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var digest = hmacsha1.convert(utf8.encode(encodedPutPolicy));
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// 对签名进行URL安全的Base64编码：
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var encodeSign = base64Encode(digest.bytes);
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return '$accessKey:$encodeSign:$encodedPutPolicy';
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}
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/// 生成putPolicy
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/// https://developer.qiniu.com/kodo/manual/1206/put-policy
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static String generatePutPolicy(String bucket, String key) {
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Map<String, dynamic> map = {
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'scope': '$bucket:$key',
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'deadline': new DateTime.now().millisecondsSinceEpoch + 3600
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};
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return json.encode(map);
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}
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}
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