File Uploads with HTMX and Golang
Ofcourse you have already heard about the awesomeness of HTMX (you haven’t? well, good thing you’re here ?)
Today, we will be combining the simplicity of HTMX with the power of Golang to upload files to our server. Yeah, we are going to be building another exciting web feature with HTMX and Go.
By the way, if you really want a practical project-based guide on building fullstack apps with HTMX, check out my HTMX + Go: Build Fullstack Applications with Golang and HTMX course [Discount Included].
So, let’s begin.
Setting Up the Go Project
The first step is to setup a simple Go project. We can do that by creating a folder, going into it and initialising it as a Go project using the commands below:
mkdir go-htmx-file-uploads cd go-htmx-file-uploads go mod init go-htmx-file-uploads
Once we have the project initialized, let’s now install some dependencies we will be requiring within our project.
This will be a simple server that will contain a single page with our upload form and also an endpoint that will be used to upload the file.
For routing, we will be using the Gorilla Mux routing library, but feel free to use any routing solution of your choice. We will also be using Google’s UUID library for Go to generate random names for our files when we upload them. This is a personal preference as you can generate file names in different ways.
Install these two with the commands below:
Gorillla Mux
go get -u github.com/gorilla/mux
Google UUID
go get github.com/google/uuid
With these two installed, our project is fully set up, and we can move to the next step.
Creating our Templates
We will be creating two HTML templates for this little project.
The first template will be an HTML fragment that simply takes a slice of string messages that we can send from the server to the client.
This fragment will take this slice of messages and loop through it to create an HTML list to be returned to the client (remember how HTMX works with Hypermedia APIs, pretty cool huh ?).
So, let’s create that first.
At the root of the Go project, first create a templates folder inside which we will be storing all our templates.
Next, create a file messages.html inside the templates folder and add the following code to it:
{{define "messages"}}
<ul>
{{range .}}
<li>{{ . }}</li>
{{end}}
</ul>
{{end}}
This defines a messages template and loops through the incoming slice of string messages to form an HTML list.
For our next template, we will be creating the file upload page itself.
Inside the templates folder, create a new file upload.html and paste in the code below:
{{define "upload"}}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://unpkg.com/htmx.org@1.9.12"></script>
<title>Upload File</title>
</head>
<body>
<div class="row">
<div class="col-md-6 p-5 mt-5">
<h4>Upload File</h4>
<form class="form">
<div id="messages"></div>
<div class="mb-3">
<label for="avatarInput" class="form-label">Select Image</label>
<input type="file" class="form-control" id="avatarInput" name="avatar" required>
</div>
<button
hx-post="/upload"
hx-encoding="multipart/form-data"
hx-target="#messages"
type="submit" class="btn btn-primary">Upload</button>
</form>
</div>
</div>
</body>
</html>
{{end}}
Perfect!
Now let’s go through the code in this file.
First, we have defined the template with the name upload, this is the name we will use to reference it later in our route handlers.
We then have some boilerplate HTML code in the head section, but I have included two important libraries here (well, just one is really important, the other is just for CSS vibes).
The HTMX library has been included with the
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1664
14
1421
52
1315
25
1266
29
1239
24
Golang's Purpose: Building Efficient and Scalable Systems
Apr 09, 2025 pm 05:17 PM
Go language performs well in building efficient and scalable systems. Its advantages include: 1. High performance: compiled into machine code, fast running speed; 2. Concurrent programming: simplify multitasking through goroutines and channels; 3. Simplicity: concise syntax, reducing learning and maintenance costs; 4. Cross-platform: supports cross-platform compilation, easy deployment.
Golang vs. Python: Performance and Scalability
Apr 19, 2025 am 12:18 AM
Golang is better than Python in terms of performance and scalability. 1) Golang's compilation-type characteristics and efficient concurrency model make it perform well in high concurrency scenarios. 2) Python, as an interpreted language, executes slowly, but can optimize performance through tools such as Cython.
Golang and C : Concurrency vs. Raw Speed
Apr 21, 2025 am 12:16 AM
Golang is better than C in concurrency, while C is better than Golang in raw speed. 1) Golang achieves efficient concurrency through goroutine and channel, which is suitable for handling a large number of concurrent tasks. 2)C Through compiler optimization and standard library, it provides high performance close to hardware, suitable for applications that require extreme optimization.
Golang's Impact: Speed, Efficiency, and Simplicity
Apr 14, 2025 am 12:11 AM
Goimpactsdevelopmentpositivelythroughspeed,efficiency,andsimplicity.1)Speed:Gocompilesquicklyandrunsefficiently,idealforlargeprojects.2)Efficiency:Itscomprehensivestandardlibraryreducesexternaldependencies,enhancingdevelopmentefficiency.3)Simplicity:
Golang vs. Python: Key Differences and Similarities
Apr 17, 2025 am 12:15 AM
Golang and Python each have their own advantages: Golang is suitable for high performance and concurrent programming, while Python is suitable for data science and web development. Golang is known for its concurrency model and efficient performance, while Python is known for its concise syntax and rich library ecosystem.
Golang and C : The Trade-offs in Performance
Apr 17, 2025 am 12:18 AM
The performance differences between Golang and C are mainly reflected in memory management, compilation optimization and runtime efficiency. 1) Golang's garbage collection mechanism is convenient but may affect performance, 2) C's manual memory management and compiler optimization are more efficient in recursive computing.
The Performance Race: Golang vs. C
Apr 16, 2025 am 12:07 AM
Golang and C each have their own advantages in performance competitions: 1) Golang is suitable for high concurrency and rapid development, and 2) C provides higher performance and fine-grained control. The selection should be based on project requirements and team technology stack.
Golang vs. C : Performance and Speed Comparison
Apr 21, 2025 am 12:13 AM
Golang is suitable for rapid development and concurrent scenarios, and C is suitable for scenarios where extreme performance and low-level control are required. 1) Golang improves performance through garbage collection and concurrency mechanisms, and is suitable for high-concurrency Web service development. 2) C achieves the ultimate performance through manual memory management and compiler optimization, and is suitable for embedded system development.
