Terminating HTTP Request Processing
When serving HTTP requests, there may be scenarios where it becomes necessary to terminate the processing and send an error response. This can be achieved by returning from the ServeHTTP() method.
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { // Inspect incoming parameters if !IsValid(r.URL.Query()) { str := `{"Result":"","Error":"Invalid Parameters"}` fmt.Fprint(w, str) return } // Continue normal API processing })
Using HTTP Error Codes
For more sophisticated error handling, it's recommended to return an appropriate HTTP error code instead of the default 200 OK.
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { // Inspect incoming parameters if !IsValid(r.URL.Query()) { http.Error(w, "Invalid Parameters", http.StatusBadRequest) return } // Continue normal API processing })
JSON-Formatted Error Responses
To provide a more detailed error response in JSON format:
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { // Inspect incoming parameters if !IsValid(r.URL.Query()) { w.Header().Set("Content-Type", "application/json") w.WriteHeader(http.StatusBadRequest) str := `{"Result":"","Error":"Invalid Parameters"}` fmt.Fprint(w, str) return } // Continue normal API processing })
Propagating Errors from Nested Functions
If error handling is performed in a function called from ServeHTTP(), the error state must be returned to allow ServeHTTP() to terminate the request processing:
func decodeParams(r *http.Request) (*params, error) { p := new(params) // Decode parameters and check their validity if !ok { return nil, errors.New("Invalid Parameters") } return p, nil } func handleRequest(w http.ResponseWriter, r *http.Request) { p, err := decodeParams(r) if err != nil { http.Error(w, err.Error(), http.StatusBadRequest) return } // Continue normal API processing }
The above is the detailed content of How to Gracefully Handle and Terminate HTTP Request Processing in Go?. For more information, please follow other related articles on the PHP Chinese website!

The article discusses using Go's "strings" package for string manipulation, detailing common functions and best practices to enhance efficiency and handle Unicode effectively.

The article details using Go's "crypto" package for cryptographic operations, discussing key generation, management, and best practices for secure implementation.Character count: 159

The article details the use of Go's "time" package for handling dates, times, and time zones, including getting current time, creating specific times, parsing strings, and measuring elapsed time.

Article discusses using Go's "reflect" package for variable inspection and modification, highlighting methods and performance considerations.

The article discusses using Go's "sync/atomic" package for atomic operations in concurrent programming, detailing its benefits like preventing race conditions and improving performance.

The article discusses type conversions in Go, including syntax, safe conversion practices, common pitfalls, and learning resources. It emphasizes explicit type conversion and error handling.[159 characters]

The article discusses type assertions in Go, focusing on syntax, potential errors like panics and incorrect types, safe handling methods, and performance implications.

The article explains the use of the "select" statement in Go for handling multiple channel operations, its differences from the "switch" statement, and common use cases like handling multiple channels, implementing timeouts, non-b


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

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

SublimeText3 English version
Recommended: Win version, supports code prompts!

SublimeText3 Linux new version
SublimeText3 Linux latest version

Notepad++7.3.1
Easy-to-use and free code editor
