javascript nodejs 将原始图像数据写入 jpeg 文件？
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nodejs write raw image data to jpeg file?
提问by zumzum
I am getting data from a get request. The data (in the body of the response) looks something like this:
我正在从 get 请求中获取数据。数据（在响应正文中）如下所示：
... ?à???"????????????????????N??!1"AQa2q?#BR±e3brS2á??á$?CDTst￠3&45d?ò?????????????????-??????!1A"Qa?eq±á?2á?ú??????." """ """ """ """ """ """ """ """ """ """ """ """ """ """ """ """ """ """ """ """ """ """ """ """R1o#a￥7Jí??M6?N? ]·!]=Fv-?`7~q?ee2%·JokkZüCbìt<ù{?9?ù??′(%A,Ià?2I?t×bn6w?ù￥V?2Sà><k5où?92Eh??ü¨/aY!?|?t￥??T}U?|òúμ?xu?f?3 K??{ù{e$·DúBMZ?cp}′R|M?2ó8üg)·ù?f?$zXiRTü}ó?>,êú?íR5y:\ .....
the response headers look like this:
响应标头如下所示：
HTTP/1.1 200 OK
Content-Length: 26965
Access-Control-Allow-Origin: *
Content-Type: image/jpeg; charset=UTF-8
Date: Mon, 06 Feb 2012 21:14:21 GMT
Expires: Mon, 06 Feb 2012 22:14:21 GMT
Cache-Control: public, max-age=3600
Last-Modified: Fri, 13 Feb 2009 23:31:30 GMT
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Server: Dropta Server 1.0
X-Frame-Options: SAMEORIGIN
Connection: close
I want to get the body content which is my image data and save it to a name.jpegfile on the server.
我想获取作为我的图像数据的正文内容并将其保存到name.jpeg服务器上的文件中。
How can I do that? I tried using buffers combined with the fsmodule, but I am kind of lost.
我怎样才能做到这一点？我尝试将缓冲区与fs模块结合使用，但我有点迷茫。
Thanks
谢谢
回答by stewe
Here's an example, which downloads http://upload.wikimedia.org/wikipedia/commons/1/15/Jagdschloss_Granitz_4.jpgto name.jpeg
这是一个示例，它将http://upload.wikimedia.org/wikipedia/commons/1/15/Jagdschloss_Granitz_4.jpg下载到name.jpeg
var fs=require('fs');
var http=require('http');
var f=fs.createWriteStream('name.jpeg');
var options={
host:'upload.wikimedia.org',
port:80,
path:'/wikipedia/commons/1/15/Jagdschloss_Granitz_4.jpg'
}
http.get(options,function(res){
res.on('data', function (chunk) {
f.write(chunk);
});
res.on('end',function(){
f.end();
});
});
回答by Laurent Perrin
A slightly shorter version, which uses Stream.pipe:
一个稍短的版本，它使用Stream.pipe：
var http = require('http'),
fs = require('fs'),
imgSource = 'http://upload.wikimedia.org/wikipedia/commons/1/15/Jagdschloss_Granitz_4.jpg';
http.get(imgSource, function(res) {
res.pipe(fs.createWriteStream('wiki.jpg'));
});
