Assertion `(offset) < (storage_size)' failed.

[maciej-zuk]

Hi, I have following exception when I run code (it uses http and http-post internally and was working in 0.12.* node)
node: ../src/stream_base.cc:157: int node::StreamBase::Writev(const v8::FunctionCallbackInfov8::Value&): Assertion `(offset) < (storage_size)' failed.

$ node -v
v4.1.1

$ npm -v
3.3.5

i can provide details if needed

[bnoordhuis]

Do you have a small test case that reproduces it, no third-party modules?

[maciej-zuk]

Here you are (logic extracted from http-post):

var options = require('url').parse('http://XYZ:3000/build');
options.method = 'POST';
options.headers = {
    'Content-Type': 'multipart/form-data; boundary=-----np0.25114468042738736',
    'Content-Length': 8809774
};

var req = require('http').request(options, function(responce) {
    console.log('response');
});

var fs = require('fs');
req.write('-------np0.25114468042738736\r\n');
req.write('Content-Disposition: form-data; name="token"\r\n\r\n');
req.write('some-token\r\n');
req.write('-------np0.25114468042738736\r\n');
req.write('Content-Disposition: form-data; name="targets"\r\n\r\n');
req.write('some-data\r\n');
req.write('-------np0.25114468042738736\r\n');
req.write('Content-Disposition: form-data; name="zip"; filename="trunk.zip"\r\n\r\n');
req.write(fs.readFileSync('./trunk.zip', 'binary'));
req.write('\r\n');
req.write('-------np0.25114468042738736--\r\n');
req.end();

XYZ is host accepting post requests at port 3000. Problematic part seems to be writing binary data to http request.

[bnoordhuis]

What does trunk.zip contain in your example? How big is it approximately?

[maciej-zuk]

it's a zip archive ~8.8MByte

[maciej-zuk]

ok, update: it seems that if you put 'Content-Length' smaller than actual content size it throws that exception

actualy if you put any 'Content-Lenght', if you ommit that it works

[maciej-zuk]

Minimal example:

var options = require('url').parse('http://posttestserver.com/post.php');
options.method = 'POST';
options.headers = {
    'Content-Type': 'multipart/form-data; boundary=-----np0.13421504013240337',
    'Content-Length': 1
};

var req = require('http').request(options, function(responce) {
    console.log('response');
});

var fs = require('fs');
req.write('-------np0.926842468092218--\r\n');
req.write('Content-Disposition: form-data; name="name"; filename="name"\r\n\r\n');
req.write(fs.readFileSync('./test', 'binary'));
req.write('\r\n');
req.write('-------np0.926842468092218--\r\n');
req.end();

test file is created as:
dd if=/dev/urandom of=test count=20000

[maciej-zuk]

tested on node v4.1.2 and it works :) much ado about nothing