- Move title and last_modified to YAML front matter (all policy docs) - Make all document sections H1, subsections H2 - Update version rule to reference front matter format - Fix "our" → "your" typo in Go styleguide - Fix Python styleguide numbering (2. → 1.) - Fix README: "flat collection" → accurate description, remove stale TODO - Remove Makefile items from code styleguides (repo stuff, not code), add note linking to Repository Policies - Change zerolog → slog in Go styleguide - Fix JS styleguide npm reference: both work, but use make targets - Drop .json from healthcheck path, add JSON content-type requirement - Add Author/License to Go HTTP Server Conventions - Convert hyperlinks to backtick URLs in checklists for consistency - Add version/front matter to both checklists
This commit is contained in:
@@ -1,12 +1,13 @@
|
||||
Version: 2026-02-22
|
||||
|
||||
# Go HTTP Server Conventions
|
||||
---
|
||||
title: Go HTTP Server Conventions
|
||||
last_modified: 2026-02-22
|
||||
---
|
||||
|
||||
This document defines the architectural patterns, design decisions, and
|
||||
conventions for building Go HTTP servers. All new projects must follow these
|
||||
standards.
|
||||
|
||||
## Table of Contents
|
||||
# Table of Contents
|
||||
|
||||
1. [Required Libraries](#1-required-libraries)
|
||||
2. [Project Structure](#2-project-structure)
|
||||
@@ -25,7 +26,7 @@ standards.
|
||||
|
||||
---
|
||||
|
||||
## 1. Required Libraries
|
||||
# 1. Required Libraries
|
||||
|
||||
These libraries are **mandatory** for all new projects:
|
||||
|
||||
@@ -44,7 +45,7 @@ These libraries are **mandatory** for all new projects:
|
||||
|
||||
---
|
||||
|
||||
## 2. Project Structure
|
||||
# 2. Project Structure
|
||||
|
||||
```
|
||||
project-root/
|
||||
@@ -86,7 +87,7 @@ project-root/
|
||||
└── Dockerfile
|
||||
```
|
||||
|
||||
### Key Principles
|
||||
## Key Principles
|
||||
|
||||
- **`cmd/{appname}/`**: Only the entry point. Minimal logic, just bootstrapping.
|
||||
- **`internal/`**: All application packages. Not importable by external
|
||||
@@ -96,9 +97,9 @@ project-root/
|
||||
|
||||
---
|
||||
|
||||
## 3. Dependency Injection (Uber fx)
|
||||
# 3. Dependency Injection (Uber fx)
|
||||
|
||||
### Entry Point Pattern
|
||||
## Entry Point Pattern
|
||||
|
||||
```go
|
||||
// cmd/httpd/main.go
|
||||
@@ -143,7 +144,7 @@ func main() {
|
||||
}
|
||||
```
|
||||
|
||||
### Params Struct Pattern
|
||||
## Params Struct Pattern
|
||||
|
||||
Every component that receives dependencies uses a params struct with `fx.In`:
|
||||
|
||||
@@ -163,7 +164,7 @@ type Handlers struct {
|
||||
}
|
||||
```
|
||||
|
||||
### Factory Function Pattern
|
||||
## Factory Function Pattern
|
||||
|
||||
All components expose a `New` function with this signature:
|
||||
|
||||
@@ -187,7 +188,7 @@ func New(lc fx.Lifecycle, params SomeParams) (*Something, error) {
|
||||
}
|
||||
```
|
||||
|
||||
### Dependency Order
|
||||
## Dependency Order
|
||||
|
||||
Providers are resolved automatically by fx, but conceptually follow this order:
|
||||
|
||||
@@ -203,9 +204,9 @@ Providers are resolved automatically by fx, but conceptually follow this order:
|
||||
|
||||
---
|
||||
|
||||
## 4. Server Architecture
|
||||
# 4. Server Architecture
|
||||
|
||||
### Server Struct
|
||||
## Server Struct
|
||||
|
||||
The Server struct is the central orchestrator:
|
||||
|
||||
@@ -236,7 +237,7 @@ type Server struct {
|
||||
}
|
||||
```
|
||||
|
||||
### Server Factory
|
||||
## Server Factory
|
||||
|
||||
```go
|
||||
func New(lc fx.Lifecycle, params ServerParams) (*Server, error) {
|
||||
@@ -261,7 +262,7 @@ func New(lc fx.Lifecycle, params ServerParams) (*Server, error) {
|
||||
}
|
||||
```
|
||||
|
||||
### HTTP Server Setup
|
||||
## HTTP Server Setup
|
||||
|
||||
```go
|
||||
// internal/server/http.go
|
||||
@@ -291,7 +292,7 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
|
||||
}
|
||||
```
|
||||
|
||||
### Signal Handling and Graceful Shutdown
|
||||
## Signal Handling and Graceful Shutdown
|
||||
|
||||
```go
|
||||
func (s *Server) serve() int {
|
||||
@@ -335,9 +336,9 @@ func (s *Server) cleanShutdown() {
|
||||
|
||||
---
|
||||
|
||||
## 5. Routing (go-chi)
|
||||
# 5. Routing (go-chi)
|
||||
|
||||
### Route Setup Pattern
|
||||
## Route Setup Pattern
|
||||
|
||||
```go
|
||||
// internal/server/routes.go
|
||||
@@ -380,7 +381,7 @@ func (s *Server) SetupRoutes() {
|
||||
s.router.Get("/login", auth(s.h.HandleLoginGET()).ServeHTTP)
|
||||
|
||||
// Health check (standard path)
|
||||
s.router.Get("/.well-known/healthcheck.json", s.h.HandleHealthCheck())
|
||||
s.router.Get("/.well-known/healthcheck", s.h.HandleHealthCheck())
|
||||
|
||||
// Protected route groups
|
||||
if viper.GetString("METRICS_USERNAME") != "" {
|
||||
@@ -392,7 +393,7 @@ func (s *Server) SetupRoutes() {
|
||||
}
|
||||
```
|
||||
|
||||
### Middleware Ordering (Critical)
|
||||
## Middleware Ordering (Critical)
|
||||
|
||||
1. `middleware.Recoverer` - Panic recovery (must be first)
|
||||
2. `middleware.RequestID` - Generate request IDs
|
||||
@@ -402,7 +403,7 @@ func (s *Server) SetupRoutes() {
|
||||
6. `middleware.Timeout(60s)` - Request timeout
|
||||
7. `sentryhttp.Handler` - Sentry error reporting (if enabled)
|
||||
|
||||
### API Versioning
|
||||
## API Versioning
|
||||
|
||||
Use route groups for API versioning:
|
||||
|
||||
@@ -412,7 +413,7 @@ s.router.Route("/api/v1", func(r chi.Router) {
|
||||
})
|
||||
```
|
||||
|
||||
### Static File Serving
|
||||
## Static File Serving
|
||||
|
||||
Static files are served at `/s/` prefix:
|
||||
|
||||
@@ -422,9 +423,9 @@ s.router.Mount("/s", http.StripPrefix("/s", http.FileServer(http.FS(static.Stati
|
||||
|
||||
---
|
||||
|
||||
## 6. Handler Conventions
|
||||
# 6. Handler Conventions
|
||||
|
||||
### Handler Base Struct
|
||||
## Handler Base Struct
|
||||
|
||||
```go
|
||||
// internal/handlers/handlers.go
|
||||
@@ -457,7 +458,7 @@ func New(lc fx.Lifecycle, params HandlersParams) (*Handlers, error) {
|
||||
}
|
||||
```
|
||||
|
||||
### Closure-Based Handler Pattern
|
||||
## Closure-Based Handler Pattern
|
||||
|
||||
All handlers return `http.HandlerFunc` using the closure pattern. This allows
|
||||
initialization logic to run once when the handler is created:
|
||||
@@ -479,7 +480,7 @@ func (s *Handlers) HandleIndex() http.HandlerFunc {
|
||||
}
|
||||
```
|
||||
|
||||
### JSON Handler Pattern
|
||||
## JSON Handler Pattern
|
||||
|
||||
```go
|
||||
// internal/handlers/now.go
|
||||
@@ -494,7 +495,7 @@ func (s *Handlers) HandleNow() http.HandlerFunc {
|
||||
}
|
||||
```
|
||||
|
||||
### Response Helpers
|
||||
## Response Helpers
|
||||
|
||||
```go
|
||||
// internal/handlers/handlers.go
|
||||
@@ -514,7 +515,7 @@ func (s *Handlers) decodeJSON(w http.ResponseWriter, r *http.Request, v interfac
|
||||
}
|
||||
```
|
||||
|
||||
### Handler Naming Convention
|
||||
## Handler Naming Convention
|
||||
|
||||
- `HandleIndex()` - Main page
|
||||
- `HandleLoginGET()` / `HandleLoginPOST()` - Form handlers with HTTP method
|
||||
@@ -524,9 +525,9 @@ func (s *Handlers) decodeJSON(w http.ResponseWriter, r *http.Request, v interfac
|
||||
|
||||
---
|
||||
|
||||
## 7. Middleware Conventions
|
||||
# 7. Middleware Conventions
|
||||
|
||||
### Middleware Struct
|
||||
## Middleware Struct
|
||||
|
||||
```go
|
||||
// internal/middleware/middleware.go
|
||||
@@ -550,7 +551,7 @@ func New(lc fx.Lifecycle, params MiddlewareParams) (*Middleware, error) {
|
||||
}
|
||||
```
|
||||
|
||||
### Middleware Signature
|
||||
## Middleware Signature
|
||||
|
||||
All custom middleware methods return `func(http.Handler) http.Handler`:
|
||||
|
||||
@@ -569,7 +570,7 @@ func (s *Middleware) Auth() func(http.Handler) http.Handler {
|
||||
}
|
||||
```
|
||||
|
||||
### Logging Middleware with Status Capture
|
||||
## Logging Middleware with Status Capture
|
||||
|
||||
```go
|
||||
type loggingResponseWriter struct {
|
||||
@@ -613,7 +614,7 @@ func (s *Middleware) Logging() func(http.Handler) http.Handler {
|
||||
}
|
||||
```
|
||||
|
||||
### CORS Middleware
|
||||
## CORS Middleware
|
||||
|
||||
```go
|
||||
func (s *Middleware) CORS() func(http.Handler) http.Handler {
|
||||
@@ -628,7 +629,7 @@ func (s *Middleware) CORS() func(http.Handler) http.Handler {
|
||||
}
|
||||
```
|
||||
|
||||
### Metrics Middleware
|
||||
## Metrics Middleware
|
||||
|
||||
```go
|
||||
func (s *Middleware) Metrics() func(http.Handler) http.Handler {
|
||||
@@ -654,9 +655,9 @@ func (s *Middleware) MetricsAuth() func(http.Handler) http.Handler {
|
||||
|
||||
---
|
||||
|
||||
## 8. Configuration (Viper)
|
||||
# 8. Configuration (Viper)
|
||||
|
||||
### Config Struct
|
||||
## Config Struct
|
||||
|
||||
```go
|
||||
// internal/config/config.go
|
||||
@@ -679,7 +680,7 @@ type Config struct {
|
||||
}
|
||||
```
|
||||
|
||||
### Configuration Loading
|
||||
## Configuration Loading
|
||||
|
||||
```go
|
||||
func New(lc fx.Lifecycle, params ConfigParams) (*Config, error) {
|
||||
@@ -737,7 +738,7 @@ func New(lc fx.Lifecycle, params ConfigParams) (*Config, error) {
|
||||
}
|
||||
```
|
||||
|
||||
### Configuration Precedence
|
||||
## Configuration Precedence
|
||||
|
||||
1. **Environment variables** (highest priority via `AutomaticEnv()`)
|
||||
2. **`.env` file** (loaded via `godotenv/autoload` import)
|
||||
@@ -745,7 +746,7 @@ func New(lc fx.Lifecycle, params ConfigParams) (*Config, error) {
|
||||
`~/.config/{appname}/{appname}.yaml`
|
||||
4. **Defaults** (lowest priority)
|
||||
|
||||
### Environment Loading
|
||||
## Environment Loading
|
||||
|
||||
Import godotenv with autoload to automatically load `.env` files:
|
||||
|
||||
@@ -757,9 +758,9 @@ import (
|
||||
|
||||
---
|
||||
|
||||
## 9. Logging (slog)
|
||||
# 9. Logging (slog)
|
||||
|
||||
### Logger Struct
|
||||
## Logger Struct
|
||||
|
||||
```go
|
||||
// internal/logger/logger.go
|
||||
@@ -775,7 +776,7 @@ type Logger struct {
|
||||
}
|
||||
```
|
||||
|
||||
### Logger Setup with TTY Detection
|
||||
## Logger Setup with TTY Detection
|
||||
|
||||
```go
|
||||
func New(lc fx.Lifecycle, params LoggerParams) (*Logger, error) {
|
||||
@@ -809,7 +810,7 @@ func New(lc fx.Lifecycle, params LoggerParams) (*Logger, error) {
|
||||
}
|
||||
```
|
||||
|
||||
### Logger Methods
|
||||
## Logger Methods
|
||||
|
||||
```go
|
||||
func (l *Logger) EnableDebugLogging() {
|
||||
@@ -830,7 +831,7 @@ func (l *Logger) Identify() {
|
||||
}
|
||||
```
|
||||
|
||||
### Logging Patterns
|
||||
## Logging Patterns
|
||||
|
||||
```go
|
||||
// Info with fields
|
||||
@@ -866,9 +867,9 @@ s.log.Info("request",
|
||||
|
||||
---
|
||||
|
||||
## 10. Database Wrapper
|
||||
# 10. Database Wrapper
|
||||
|
||||
### Database Struct
|
||||
## Database Struct
|
||||
|
||||
```go
|
||||
// internal/database/database.go
|
||||
@@ -885,7 +886,7 @@ type Database struct {
|
||||
}
|
||||
```
|
||||
|
||||
### Database Factory with Lifecycle
|
||||
## Database Factory with Lifecycle
|
||||
|
||||
```go
|
||||
func New(lc fx.Lifecycle, params DatabaseParams) (*Database, error) {
|
||||
@@ -912,7 +913,7 @@ func New(lc fx.Lifecycle, params DatabaseParams) (*Database, error) {
|
||||
}
|
||||
```
|
||||
|
||||
### Usage Pattern
|
||||
## Usage Pattern
|
||||
|
||||
The Database struct is injected into handlers and other services:
|
||||
|
||||
@@ -933,9 +934,9 @@ func (s *Handlers) HandleSomething() http.HandlerFunc {
|
||||
|
||||
---
|
||||
|
||||
## 11. Globals Package
|
||||
# 11. Globals Package
|
||||
|
||||
### Package Variables and Struct
|
||||
## Package Variables and Struct
|
||||
|
||||
```go
|
||||
// internal/globals/globals.go
|
||||
@@ -967,7 +968,7 @@ func New(lc fx.Lifecycle) (*Globals, error) {
|
||||
}
|
||||
```
|
||||
|
||||
### Setting Globals in Main
|
||||
## Setting Globals in Main
|
||||
|
||||
```go
|
||||
// cmd/httpd/main.go
|
||||
@@ -985,7 +986,7 @@ func main() {
|
||||
}
|
||||
```
|
||||
|
||||
### Build-Time Variable Injection
|
||||
## Build-Time Variable Injection
|
||||
|
||||
Use ldflags to inject version information at build time:
|
||||
|
||||
@@ -999,9 +1000,9 @@ build:
|
||||
|
||||
---
|
||||
|
||||
## 12. Static Assets & Templates
|
||||
# 12. Static Assets & Templates
|
||||
|
||||
### Static File Embedding
|
||||
## Static File Embedding
|
||||
|
||||
```go
|
||||
// static/static.go
|
||||
@@ -1026,7 +1027,7 @@ static/
|
||||
└── jquery-3.5.1.slim.min.js
|
||||
```
|
||||
|
||||
### Template Embedding and Lazy Parsing
|
||||
## Template Embedding and Lazy Parsing
|
||||
|
||||
```go
|
||||
// templates/templates.go
|
||||
@@ -1049,7 +1050,7 @@ func GetParsed() *template.Template {
|
||||
}
|
||||
```
|
||||
|
||||
### Template Composition
|
||||
## Template Composition
|
||||
|
||||
Templates use Go's template composition:
|
||||
|
||||
@@ -1064,7 +1065,7 @@ Templates use Go's template composition:
|
||||
{{ template "pagefooter.html" . }} {{ template "htmlfooter.html" . }}
|
||||
```
|
||||
|
||||
### Static Asset References
|
||||
## Static Asset References
|
||||
|
||||
Reference static files with `/s/` prefix:
|
||||
|
||||
@@ -1076,9 +1077,9 @@ Reference static files with `/s/` prefix:
|
||||
|
||||
---
|
||||
|
||||
## 13. Health Check
|
||||
# 13. Health Check
|
||||
|
||||
### Health Check Service
|
||||
## Health Check Service
|
||||
|
||||
```go
|
||||
// internal/healthcheck/healthcheck.go
|
||||
@@ -1114,7 +1115,7 @@ func New(lc fx.Lifecycle, params HealthcheckParams) (*Healthcheck, error) {
|
||||
}
|
||||
```
|
||||
|
||||
### Health Check Response
|
||||
## Health Check Response
|
||||
|
||||
```go
|
||||
type HealthcheckResponse struct {
|
||||
@@ -1144,19 +1145,19 @@ func (s *Healthcheck) Healthcheck() *HealthcheckResponse {
|
||||
}
|
||||
```
|
||||
|
||||
### Standard Endpoint
|
||||
## Standard Endpoint
|
||||
|
||||
Health check is served at the standard `.well-known` path:
|
||||
|
||||
```go
|
||||
s.router.Get("/.well-known/healthcheck.json", s.h.HandleHealthCheck())
|
||||
s.router.Get("/.well-known/healthcheck", s.h.HandleHealthCheck())
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## 14. External Integrations
|
||||
# 14. External Integrations
|
||||
|
||||
### Sentry Error Reporting
|
||||
## Sentry Error Reporting
|
||||
|
||||
Sentry is conditionally enabled based on `SENTRY_DSN` environment variable:
|
||||
|
||||
@@ -1201,7 +1202,7 @@ if s.sentryEnabled {
|
||||
}
|
||||
```
|
||||
|
||||
### Prometheus Metrics
|
||||
## Prometheus Metrics
|
||||
|
||||
Metrics are conditionally enabled and protected by basic auth:
|
||||
|
||||
@@ -1220,7 +1221,7 @@ if viper.GetString("METRICS_USERNAME") != "" {
|
||||
}
|
||||
```
|
||||
|
||||
### Environment Variables Summary
|
||||
## Environment Variables Summary
|
||||
|
||||
| Variable | Description | Default |
|
||||
| ------------------ | -------------------------------- | ------- |
|
||||
@@ -1231,3 +1232,11 @@ if viper.GetString("METRICS_USERNAME") != "" {
|
||||
| `MAINTENANCE_MODE` | Enable maintenance mode | false |
|
||||
| `METRICS_USERNAME` | Basic auth username for /metrics | "" |
|
||||
| `METRICS_PASSWORD` | Basic auth password for /metrics | "" |
|
||||
|
||||
# Author
|
||||
|
||||
[@sneak](https://sneak.berlin) <[sneak@sneak.berlin](mailto:sneak@sneak.berlin)>
|
||||
|
||||
# License
|
||||
|
||||
MIT. See [LICENSE](../LICENSE).
|
||||
|
||||
Reference in New Issue
Block a user