node crashes segmentation fault core dumped

[Selion05]

just tried to get it working in a docker container.

Dockerfile

FROM ubuntu:16.04

RUN apt-get update
RUN apt-get -y upgrade
RUN apt-get install -y nano curl build-essential
RUN curl -sL https://deb.nodesource.com/setup_6.x -o nodesource_setup.sh
RUN bash nodesource_setup.sh && rm nodesource_setup.sh
RUN apt-get install -y nodejs
RUN mkdir /app
WORKDIR app
RUN npm install -s express hummus
COPY app.js app.js

EXPOSE 8081

app.js

var express = require('express');
var app = express();

app.get('/test', (req, res) => res.send('It works!'))
app.get('/hummus', function(req, res){
        res.writeHead(200, {'Content-Type': 'application/pdf'});

        var hummus = require('hummus');

        var pdfWriter = hummus.createWriter(new hummus.PDFStreamForResponse(res));
        var page = pdfWriter.createPage(0,0,595,842);
        pdfWriter.startPageContentContext(page).writeText('Hello ' + (req.query.id ? req.query.id : 'World'),
                                                          0,400,
                                                          {
                                                            font:pdfWriter.getFontForFile('../tests/TestMaterials/fonts/arial.ttf'),
                                                            size:50,
                                                            colorspace:'gray',
                                                            color:0x00
                                                          });
        pdfWriter.writePage(page);
        pdfWriter.end();

        res.end();

        });

app.listen(3000);

building and running the contianer

docker build -t ubuntu-node .
docker container run -it -p 8081:3000 ubuntu-node bash
> node app.js

localhost:8081/test -> It works localhost:8081/hummus I get the error... Am I missing something?

[chunyenHuang]

Can you try again with

var path = require('path');
var arialFontPath = path.join(__dirname, '../tests/TestMaterials/fonts/arial.ttf');
...
font:pdfWriter.getFontForFile(arialFontPath),
...

[Selion05]

still the segmentation fault

[chunyenHuang]

well, I copied your code and made the font path simpler.

font:pdfWriter.getFontForFile(path.join(__dirname, 'arial.ttf'))

It works for me. You may try the same thing or find another source for your arial font

As I know, segmentation fault is caused by unsolved font path, so you definitely want to try the some other path combination depends on how you run your codes.

This issue may be similar to your case: Location problem

[Selion05]

ok jep you were right it was the missing font. i didn't notice that the sample required arial.ttf.

Anyway is there a more verbose log file or something simliar? Segmentation fault core dumped isn't helpful at all ;) Thanks!