Question

我正在使用 Node.JS 并且我正在尝试转换这个看起来像这样的字符串

{"blocks":[{"id":"block","block":"event","args":{"items":[]},"action":"Join"},{"id":"block","block":"player_action","args":{"items":[{"item":{"id":"txt","data":{"name":"hi"}},"slot":0},{"item":{"id":"bl_tag","data":{"option":"Add spaces","tag":"Text Value Merging","action":"SendMessage","block":"player_action"}},"slot":25},{"item":{"id":"bl_tag","data":{"option":"Regular","tag":"Alignment Mode","action":"SendMessage","block":"player_action"}},"slot":26}]},"action":"SendMessage"}]}

使用 zlib 导入 Gzip 我已经尝试过像这样在 Stack Overflow 上关注一些答案

var deflated = zlib.deflateSync('{"blocks":[{"id":"block","block":"event","args":{"items":[]},"action":"Join"},{"id":"block","block":"player_action","args":{"items":[{"item":{"id":"txt","data":{"name":"hi"}},"slot":0},{"item":{"id":"bl_tag","data":{"option":"Add spaces","tag":"Text Value Merging","action":"SendMessage","block":"player_action"}},"slot":25},{"item":{"id":"bl_tag","data":{"option":"Regular","tag":"Alignment Mode","action":"SendMessage","block":"player_action"}},"slot":26}]},"action":"SendMessage"}]}').toString('base64');
var inflated = zlib.inflateSync(new Buffer(deflated, 'base64')).toString();

console.log(inflated);

但后来我得到了错误：

{"blocks":[{"id":"block","block":"event","args":{"items":[]},"action":"Join"},{"id":"block","block":"player_action","args":{"items":[{"item":{"id":"txt","data":{"name":"hi"}},"slot":0},{"item":{"id":"bl_tag","data":{"option":"Add spaces","tag":"Text Value Merging","action":"SendMessage","block":"player_action"}},"slot":25},{"item":{"id":"bl_tag","data":{"option":"Regular","tag":"Alignment Mode","action":"SendMessage","block":"player_action"}},"slot":26}]},"action":"SendMessage"}]}
(node:25548) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
(Use `node --trace-deprecation ...` to show where the warning was created)

这就是我想要实现的（这是在 base64 之后） H4sIAAAAAAAA/6VRsQrCMBD9lXKzgwg6ZHMVuqi4iJRrc8RgmpQmFaX03720RSviIE7JvXvv3rukhdy44uJBHFvQEsRQw2w8BdCVbOAaa8UsJgUqI/3UMVYE7SyTNk5b6GZfRlQG71RnI/tz1HDrkSgPt+gnMWCELJbE4FlDx47euABi3ltNNbnJAqqJzFVjtLWUia+wIM/dyBGwp1tIDmgaSlKqlbZR+NxlR1am5D0q+rrDK8pi+UOWLanGYP0MsjZa2ZLfN0mdpD9CrLq375iqufMAPTQAnOUBAAA=（来自网站）

Answer 1

除了警告不要使用 Buffer ctor which is documented as deprecated 并且正如 derpischer 评论的那样，您可以使用 Buffer.from 进行修复：

TLDR: gzip != deflate -- 但 abs(gzip-deflate)

zlib 库和访问它的 nodejs 模块支持多种相似且相关但不同且不相同的格式，所有格式均使用最初为 (PK)ZIP 开发的 deflate/inflate 压缩算法，以及较新的 Brotli 算法（此处不相关）。

zlib 支持：(1) 'raw' 充气/放气； (2) 'zlib' 格式，它添加了一个简单的头文件和一个完整性检查； (3) 'gzip' 格式，它添加了不同的标头和不同的完整性检查。请参阅 How are zlib, gzip and zip related? What do they have in common and how are they different? 以了解 zlib 的作者之一马克·阿德勒 (Mark Adler) 对这种情况的解释。

nodejs 通过对 zlib 格式使用名称 {In,De}Flate 和 {in,de}flate[Sync] 来稍微混淆这一点； {In,De}FlateRaw 和 {in,de}flateRaw[Sync] 用于原始格式；和 G[un]zip 和 g[un]zip[Sync] 用于 gzip 格式。您正在使用 zlib 格式的方法，因此您获得的是 zlib 格式而不是 gzip 格式；要获取 gzip 格式，请使用 the methods for gzip format。

我正在尝试将此字符串转换为 gzip

1 个答案: