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POUncompress gzipped http request body to json in Node.js
 

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  1. POUncompress gzipped http request body to json in Node.js
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    <p>I have a windows 8 application connecting to a web service written in Node.js. On the windows 8 side I compressed my request body to gzip. But on the Node.js side I found that my req.body type was <code>Object</code>. </p> <p>I cannot use <code>zlib</code> to uncomporess the body since it's not a <code>stream</code>.</p> <p>I can use <code>zlib</code> to uncomporess the req, but I don't know how to retrieve the <code>req.body</code> content from the unzipped stream and parse the body in JSON format.</p> <p>BTW, I reviewed my request through Fiddler and it told me the request body was gzipped, and I can see my raw body through Fiddler after unzipped so the request should be correct.</p> <p><strong>Updated</strong> Below is my Node.js app</p> <pre> (function () { var express = require("express"); var zlib = require("zlib"); var app = express(); var port = 12345; app.configure(function () { app.use(express.compress()); app.use(express.bodyParser()); }); app.post("/test", function (req, res) { var request = req.body; req.pipe(zlib.createGunzip()); var response = { status: 0, value: "OK" }; res.send(200, response); }); console.log("started at port %d", port); app.listen(port); })(); </pre> <p>And below is my windows store app code (partial)</p> <pre> private async void button1_Click_1(object sender, RoutedEventArgs e) { var message = new { Name = "Shaun", Value = "12345678901234567890123456789012345678901234567890" }; var json = await JsonConvert.SerializeObjectAsync(message, Formatting.Indented); var bytes = Encoding.UTF8.GetBytes(json); var client = new HttpClient(); client.BaseAddress = new Uri("http://192.168.56.1:12345/"); client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json")); client.DefaultRequestHeaders.ExpectContinue = false; var jsonContent = new JsonContent(message); var gzipContent = new GZipContent3(jsonContent); var res = await client.PostAsync("test", gzipContent); var dialog = new Windows.UI.Popups.MessageDialog(":)", "完成"); await dialog.ShowAsync(); } internal class GZipContent3 : ByteArrayContent { public GZipContent3(HttpContent content) : base(LoadGZipBytes(content)) { //base.Headers.ContentType = content.Headers.ContentType; base.Headers.ContentType = new MediaTypeHeaderValue("x-application/x-gzip"); base.Headers.ContentEncoding.Add("gzip"); } private static byte[] LoadGZipBytes(HttpContent content) { var source = content.ReadAsByteArrayAsync().Result; byte[] buffer; using (var outStream = new MemoryStream()) { using (var gzip = new GZipStream(outStream, CompressionMode.Compress, true)) { gzip.Write(source, 0, source.Length); } buffer = outStream.ToArray(); } return buffer; } } internal class JsonContent : StringContent { private const string defaultMediaType = "application/json"; public JsonContent(string json) : base(json) { var mediaTypeHeaderValue = new MediaTypeHeaderValue(defaultMediaType); mediaTypeHeaderValue.CharSet = Encoding.UTF8.WebName; base.Headers.ContentType = mediaTypeHeaderValue; } public JsonContent(object content) : this(GetJson(content)) { } private static string GetJson(object content) { if (content == null) { throw new ArgumentNullException("content"); } var json = JsonConvert.SerializeObject(content, Formatting.Indented); return json; } } </pre>
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    1. USShaun Xu
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      1. POUncompress gzipped http request body to json in Node.js
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    2. VO
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    1. COit would be helpful if you can post relevant part of your code
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      1. POUncompress gzipped http request body to json in Node.js
      1. USvinayr
    2. CO@Shaun Xu, did you able to uncompress the request? Could you share that code?
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      1. POUncompress gzipped http request body to json in Node.js
      1. USChan Le
 

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