如何ungzip（解压缩）NodeJS请求的模块gzip响应主体？

Z时代
2024-01-10
分类：问答

如何在请求的模块响应中解压缩压缩的正文？

我已经在网上尝试了几个示例，但似乎都没有用。

request(url, function(err, response, body) {
    if(err) {
        handleError(err)
    } else {
        if(response.headers['content-encoding'] == 'gzip') {    
            // How can I unzip the gzipped string body variable?
            // For instance, this url:
            // http://highsnobiety.com/2012/08/25/norse-projects-fall-2012-lookbook/
            // Throws error:
            // { [Error: incorrect header check] errno: -3, code: 'Z_DATA_ERROR' }
            // Yet, browser displays page fine and debugger shows its gzipped
            // And unzipped by browser fine...
            if(response.headers['content-encoding'] && response.headers['content-encoding'].toLowerCase().indexOf('gzip') > -1) {   
                var body = response.body;                    
                zlib.gunzip(response.body, function(error, data) {
                    if(!error) {
                        response.body = data.toString();
                    } else {
                        console.log('Error unzipping:');
                        console.log(error);
                        response.body = body;
                    }
                });
            }
        }
    }
}

回答：

我也无法获得工作请求，因此最终使用了http。

var http = require("http"),
    zlib = require("zlib");
function getGzipped(url, callback) {
    // buffer to store the streamed decompression
    var buffer = [];
    http.get(url, function(res) {
        // pipe the response into the gunzip to decompress
        var gunzip = zlib.createGunzip();            
        res.pipe(gunzip);
        gunzip.on('data', function(data) {
            // decompression chunk ready, add it to the buffer
            buffer.push(data.toString())
        }).on("end", function() {
            // response and decompression complete, join the buffer and return
            callback(null, buffer.join(""));
        }).on("error", function(e) {
            callback(e);
        })
    }).on('error', function(e) {
        callback(e)
    });
}
getGzipped(url, function(err, data) {
   console.log(data);
});