Questions tagged [backend]
The backend tag has no usage guidance.
130
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3
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146
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How exactly is the cancellation token mechanism implemented over HTTP?
In a web application with a frontend and a backend part, how exactly is the cancellation token mechanism implemented over HTTP? HTTP is a stateless protocol and it does not allow "sharing" ...
- 167
1
vote
2
answers
57
views
frontend server obtain data from backend server, or frontend server return page with javascript that obtain data from backend server?
I'm currently learning how to separate frontend server and backend server. However, i'm not sure which approach should i take between the two
Frontend server obtain data from backend server and ...
- 111
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0
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177
views
Client or API Gateway to perform authentication on backend?
An system called X wants to consume APIs from the backend called Y.
There's a definition from the Systems Architecture Team that states that every request from the X to Y must go through the corporate'...
- 173
45
votes
5
answers
6k
views
SQL sanitizing in code with no user input
In my company's codebase, we hardcode sql queries without using an ORM.
Here's an example of a query we would run:
UPDATE client SET status="active" WHERE client_id=123
Since the query is ...
0
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0
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26
views
In a layered backend architecture is the repository/manager part still relevant? [duplicate]
We all know that in a layered backend architecture we have the Controller (or view) > Service > Repository (or Manager)
The Repository part is the part that retrieves and updates the DB.
But now ...
- 133
2
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1
answer
233
views
What is the best way to design a heavy lookup web app?
I am facing a bit of a conundrum with how I can structure my application, as I try to balance speed, cost, and efficiency.
I currently have a website, algfinder.com, which solves states of rubik's ...
- 131
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2
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51
views
In which layer request parameter limit should be for an external endpoint?
I have a batch endpoint of the form
POST /entities
["id1", "id2", ...]
Where the endpoint takes an array of ids and returns a batch response.
Now I want to set a maximum value to ...
- 190
1
vote
1
answer
459
views
How can we remove business logic from the frontend for complex, highly interactive UI's? Should business logic always live exclusively on the backend?
I have a UI for a tool with a fair amount of user interaction.
Imagine a sports tournament predictor where you select which team will finish 1st in the group, 2nd in the group etc., with the winners ...
- 935
1
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2
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289
views
Whose job actually is to process data in the database to become something like a chart in frontend?
I'm new here, so please be gentle.
I've been having issues at my workplace about the front-end team demanding me as a backend to provide every piece of data that has to be displayed in the front end. ...
- 21
-1
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1
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452
views
How to design my API that interacts with a third party API and persists to a database
I'm building a web app that will integrate with the Etsy REST API and persist information in a database for things like order information, listings, etc. Essentially a panel to manage Etsy orders and ...
1
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0
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30
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Handling events internally in server
I'm trying to make sense of how to handle events in my server in a neat way.
I'm creating a Whatsapp chatbot that receives messages via webhooks at a certain endpoint on my server. It doesn't seem ...
- 113
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1
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65
views
Intraservice Communication Using Kafka
recently i came across an architectural diagram in my organization, where a backend service sends messages to itself using Kafka, so basically it queues the messages and reads from the queue and ...
0
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0
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66
views
What is the best way to design endpoints for a restful application?
I am a backend developer and I am writing a restful application. I have a question about how best to design the endpoints.
I have a database table that stores values (I just provided an example)
|id (...
- 125
3
votes
1
answer
95
views
High level abstraction of file scanning service in domain driven design, and the implementations
My domain requires that a Resource (ubiquitous language for a singular unit of data to be moved - commonly a file or folder) can only be moved if it has been Scanned to ensure it does not contain any ...
2
votes
2
answers
333
views
High level 'implementation' of a use case in a layered/DDD architecture
I am trying to understand layered architectures and apply some DDD fundamentals to improve my architecture. I am finding that determining "what" an application service actually is, what its ...
-2
votes
1
answer
126
views
Using Apache and PHP to provide Frontend, possible to use PHP also for backend?
I have a design question to all the programmers out there.
Until now, I wrote most of my software in vb.NET oder C#, especially if I needed a Frontend.
Now I would like to have a Frontend which is ...
- 97
-3
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1
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120
views
Using two different languages where one would suffice for the task (microservices)
I previously asked this on StackOverflow, but doesn't fit there and I was suggested to move it here.
I was thinking about using two seperate backend languages for seperating concerns in a project of ...
- 97
35
votes
10
answers
9k
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Am I right that switching programming languages will have little impact on the scalability of a CRUD API?
An external consultant to our team advised us to rewrite our SaaS offering (essentially a CRUD API) in .NET because this is more "scalable" than using Node.js (or Ruby on Rails, Flask, etc.)....
- 544
-1
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1
answer
57
views
Navigating a many-to-many relationship and determining price from a bulk API Call
I think it will help to give a little context, not only about the DB architecture but the actual product. I am building a business where we will be selling pallets of liquidated merchandise. Think a ...
- 119
39
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6
answers
15k
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Is the frontend or backend (API) responsible for formatting data in a specific locale?
In our company we had a discussion whether formatting data in a certain locale is the responsibility of the frontend application or of the API that provides data to it.
Which of the following ...
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26
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6
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7k
views
How can I access Excel from my backend?
We have a lot of business logic in Excel files and we would like them to integrate in a web application (a Node.js web application). We don't want to rebuild the logic in a programming language. ...
- 390
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2
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1k
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When updating a model on a RESTful API, should there be an update endpoint per field? or one endpoint for the model?
For a RESTful API, consider a model schema as follows:
MyCoolObject {
field_a
field_b
field_c
}
Is it better to create one update endpoint to update one or many fields on the model? Or create ...
- 119
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2
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838
views
Front end (or View) classes compared to back end classes
I am developing an E-Commerce Web application using C# (back-end) and JavaScript (front-end) for a computing shop. This application mainly displays each stored computer, and all information about it (...
- 301
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4
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173
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How to design around webapp Out of Memory crashing on export from SQL DB to Excel?
I have a monolith CRUD application with a feature - possibility to export some DB entires to an Excel file. The export is done within a background task.
Often, however, when user presses the button ...
- 85
-1
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1
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563
views
Securing http communication between backend services [closed]
What is a good way to secure http communication between two backend services which are not hosted on the same network?
One way might be to have a shared secret in both services but I feel like that is ...
- 129
-3
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1
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329
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When making a compiler, what's the best way for compiling to machine code in the backend? [closed]
I know that a lot of compilers use an assembler to compile to machine code, to make an executable (compiled program).
Some people even made their own assemblers, or they just use an existing assembler,...
- 95
1
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2
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444
views
What Is the Industry Standard of Specifying APIs for Frontend-Backend Handshake?
I am somewhat new to web development and maybe this question belongs to stackoverflow, but there is a human-interaction component here.
Here is the scenario. I am serving some neural network models ...
- 121
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0
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48
views
How to validate against changes to "illegal paths" in backend requests for complex data structures?
We are building a backoffice web application where people are making changes to an array of nested objects. Because of totally non relevant business reasons there are things that users cannot change ...
- 539
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1
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6k
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REST APIs vs Message brokers for Backend to Backend communication
We are a wholesale marketplace and we have three main products in our startup. The products are:
1- the marketplace app that allows customers to view products and purchase online.
2- the seller app ...
- 71
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1
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416
views
Using databases to store temporary results between the backend and frontend of a webservice
I have a multithreaded backend application. It is inputted x, and outputs y, and this makes up a "job". A job can take up to several seconds to complete. The application is fed input via ...
- 109
2
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1
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101
views
What is a good approach to handle editing product images?
You have the following situation:
You have an SQL database containing two tables product and product_images
You would like the user to be able to add, remove, or move around existing images
They can ...
- 131
4
votes
3
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501
views
Steps to achieve the best code quality?
Currently I'm on a project where my objective is to obtain the best code quality.
We have unit, integration & e2e testing. The e2e tests are written by the Business team in cucumber and these ...
- 148
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85
views
Request and response validation
I am currently working on a project using Flask to make REST apis, blablabla. But, working with request validation tools that we use, I am thinking of whether it would be necessary to validate the ...
- 11
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610
views
Can "backend" be a subdomain?
Let's imagine an application where users can work collaboratively on projects. There's a project listing where a user can subscribe to a project, and a coworking screen where multiple users can work ...
- 406
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4
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2k
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Frontend/backend SPA communication: how to handle a list of string options
I have single page application with an Angular frontend and a Spring REST-backend.
What is the proper way to handle a list of string-based options in the fronted the enduser can select from, which ...
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1
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115
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Merge migrations from two different servers
I'm working on a project that has two separate versions of the API, v1, and v2 because they wanted to migrate from Javascript to Typescript. Both versions use the same database.
Recently I'm having ...
- 5
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1
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220
views
Variable WHERE clause while avoiding sql injection
I want the user to be able to provide a custom WHERE statement against a mysql-backed platform... do I need to worry about any possible SQL injection attacks notwithstanding invalid sql? See the ...
0
votes
1
answer
204
views
How to let backend APIs communicate with each other?
I'm building a complicated frontend-backend application of which both the frontend and backend should be highly scalable and reusable. To serve these two requirements, I'm splitting the backend into ...
- 109
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0
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73
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To merge software solutions or not?
Software A is a Node/Express application using a MongoDB database. It is accessed mostly via RESTful endpoint by a mobile app built in RN and an admin dashboard via React web app. It also has a ...
- 109
-1
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4
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279
views
How to avoid the accident that an item price is updated right after a user clicks purchase?
This is not a real scenario. This is just my assumption that such an accident may happen if the the following events really occur in this chronological order
First, a user clicked "puchase" ...
- 113
0
votes
1
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482
views
Communicating state from the backend to the frontend while the user is logged in
Please note: although this question mentions Angular and Spring Boot (Java), and it would be great to get an answer from someone with experience in that stack, I think this is more of an architectural ...
0
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2
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120
views
How to generate frontend URLs in a "12 factor app" service?
I'm working on a system with a user-facing frontend and with 1-n backend services which I'm trying to design according to the principles of the Twelve-Factor App.
I'm now facing the task of sending ...
- 111
6
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1
answer
2k
views
Designing routes for my REST API
I'm designing a RESTful API and have come across a problem when it comes to designing my routes, specifically the admin routes. My application currently has 2 types of users: regular users and ...
- 71
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1
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429
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Best way to handle and combine client side and server side validations
I want to know if the way that I handle form validations is a good way.
What I actually do is a very detailed client side validation to validate each field and with custom error message for the UI ...
2
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3
answers
2k
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why and when is queues used in backend architectures?
I am implementing a backend with a typescript framework called nestjs and I was reading some documentation about their usage of queues. https://docs.nestjs.com/techniques/queues I have never used ...
- 179
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2
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363
views
How to cache duplicate fetch and save calls that are fired within the same second
I have a service which provides an endpoint that fetches from another service, saves, and returns an record.
Here are the details:
The caller calls the endpoint using an identifier (say a customer's ...
- 19
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0
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42
views
Building an app+backend with extraneous functionality for an existing web shop. How to handle authentication on the backend?
This is an architecture question as I've been asked by an existing web store to build a
mobile app (they don't have a mobile app) that provides extra functionality to the store,
a web admin panel to ...
- 19
-1
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1
answer
504
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Good practices for frontend-backend communication
What are some good practices for handling communication between a frontend and a backend?
From what I know in order to keep things loosely coupled you shouldn't just have your frontend have a ...
- 25
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486
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Pipeline design pattern and immutability
I'm developing a backend service that is supposed to process items in a pipeline-fashion. Each stage is essentially a Function<IN, OUT>. So the current stage's input is the previous stage's ...
- 89
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2
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139
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How should process be different for front-end vs back-end?
I'm looking for references that might help explain what I've seen in software engineering regarding processes for developing in the front-end vs the back-end. They are both difficult, but I tend to ...
- 177