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I have a web app that takes pdf's from users. I need to append another pdf to the pdf uploaded by the user. I have been unable to figure out how to do this. Not sure if there is an external api that would let me combine/merge two pdf's.
This is an angular application with a node backend. The file is uploaded and stored in Dropbox using FilePicker.
Thanks!
If your app is running on linux you can use pdfunite, chances are good that it already is installed on your system. All you need is below code, you can specify as many infiles as you like.
var process = require('child_process');
var deploySh = process.exec('pdfunite in-1.pdf in-2.pdf in-n out.pdf',function(err){
if (err) throw err;
});
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I'm creating a client side application that will rely only on a remote mysql database, all the project use vuejs. Is there any js library that can work into the browser to save and retrive data on the remote mysql db?
Well, the simplest answer is "you should never do it".
Because do this on the "client side" is not secure, you will expose sensitive information about your database, and this is not okay.
You can see here why
However, if you really want to (just don't), here is, is really old but is because is not a good thing to do, but you can try.
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I am looking after tool/solution that will catch and handle errors in my app.
My application is in Ionic1. I expect from the solution to trace after the errors from the bundle.js and lead to the source code (through the sourceMap). Obviously I would like to send more data and parameters regarding the errors.
Does anyone have any suggestions?
I prefer free tools and lightweight solution.
Thanks.
Sentry is a system that helps you organize your exceptions using a web application. You can setup an account on getsentry.com or install it on your own server. You will need to create a new project and obtain the API key to interact with your application.
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I'm kinda new to this whole node super framework and I wanna know if there is any library-sub framework-package-whatever that lets you ping from the users end to a server through a nodejs web app and let's you get back all the available ping options like Time to live, do fragment, delay etc.
See the following modules on npm:
https://www.npmjs.com/package/ping
https://www.npmjs.com/package/net-ping
Remember that for ping you need a raw socket and usually root access so your only choice is to use a Node wrapper of a suid binary, or running your Node app as root or with sudo.
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I want to be able to create a new html file that will be displayed and saved on the server for future use when a new user logs into their account. Can this be done using JavaScript or are there any libraries that I could get that would be able to do this?
This can be done through use of the fs module in node. See https://nodejs.org/api/fs.html.
However, it is very likely that this is not the best solution to the problem your solving. Instead of creating a new html file for every user, you probably want to save user details in a database and have a single html file that can be populated with the data when it's needed.
This is not possible with JavaScript alone unless you use Node.js. Otherwise will need PHP or a similar server-side language.
If you go that route, here is a nice tutorial that may be beneficial to you:
http://tutorialzine.com/2011/05/generating-files-javascript-php/
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I'm building a web app that lets user upload a spreasheet file (.xlsx) and fills a table with its contents and displays the user, but I need a parser that can take that data and convert it to a json file or an array of arrays.
node-xlsx is the library you're looking for:
https://www.npmjs.org/package/node-xlsx
NB: If you need to parse in front-end, you may use Browserify to convert the library to an embeddable script.
http://oss.sheetjs.com/js-xlsx/ has a demo of their library that does all this
And the github repo https://github.com/SheetJS/js-xlsx