Nodejs 使用 zlib 以 gzip 格式发送数据
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Nodejs send data in gzip using zlib
提问by friction
I tried to send the text in gzip, but I don't know how. In the examplesthe code uses fs, but I don't want to send a text file, just a string.
我试图用 gzip 发送文本，但我不知道如何发送。在示例中，代码使用 fs，但我不想发送文本文件，只是一个字符串。
const zlib = require('zlib');
const http = require('http');
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/html', 'Content-Encoding': 'gzip'});
const text = "Hello World!";
res.end(text);
}).listen(80);
回答by Joachim Isaksson
You're half way there. I can heartily agree that the documentation isn't quite up to snuff on how to do this;
你已经成功了一半。我非常同意文档并不能完全说明如何做到这一点；
const zlib = require('zlib');
const http = require('http');
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/html', 'Content-Encoding': 'gzip'});
const text = "Hello World!";
const buf = new Buffer(text, 'utf-8'); // Choose encoding for the string.
zlib.gzip(buf, function (_, result) { // The callback will give you the
res.end(result); // result, so just send it.
});
}).listen(80);
A simplification would be not to use the Buffer;
一个简化是不使用Buffer;
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/html', 'Content-Encoding': 'gzip'});
const text = "Hello World!";
zlib.gzip(text, function (_, result) { // The callback will give you the
res.end(result); // result, so just send it.
});
}).listen(80);
...and it seems to send UTF-8 by default. However, I personally prefer to walk on the safe side when there is no default behavior that makes more sense than others and I can't immediately confirm it with documentation.
...它似乎默认发送 UTF-8。但是，当没有比其他人更有意义的默认行为并且我无法立即用文档确认时，我个人更喜欢安全地行走。
Similarly, in case you need to pass a JSON object instead:
同样，如果您需要传递一个 JSON 对象：
const data = {'hello':'swateek!'}
res.writeHead(200, {'Content-Type': 'application/json', 'Content-Encoding': 'gzip'});
const buf = new Buffer(JSON.stringify(data), 'utf-8');
zlib.gzip(buf, function (_, result) {
res.end(result);
});
