algnhsa is an AWS Lambda Go net/http server adapter.
algnhsa enables running Go web applications on AWS Lambda/API Gateway without changing the existing HTTP handlers:
package main
import (
"fmt"
"net/http"
"strconv"
"github.com/akrylysov/algnhsa"
)
func indexHandler(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("index"))
}
func addHandler(w http.ResponseWriter, r *http.Request) {
f, _ := strconv.Atoi(r.FormValue("first"))
s, _ := strconv.Atoi(r.FormValue("second"))
w.Header().Set("X-Hi", "foo")
fmt.Fprintf(w, "%d", f+s)
}
func contextHandler(w http.ResponseWriter, r *http.Request) {
proxyReq, ok := algnhsa.ProxyRequestFromContext(r.Context())
if ok {
fmt.Fprint(w, proxyReq.RequestContext.AccountID)
}
}
func main() {
http.HandleFunc("/", indexHandler)
http.HandleFunc("/add", addHandler)
http.HandleFunc("/context", contextHandler)
algnhsa.ListenAndServe(http.DefaultServeMux, nil)
}Plug in a third-party HTTP router:
package main
import (
"net/http"
"github.com/akrylysov/algnhsa"
"github.com/go-chi/chi"
)
func main() {
r := chi.NewRouter()
r.Get("/", func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("index"))
})
algnhsa.ListenAndServe(r, nil)
}More details at http://artem.krylysov.com/blog/2018/01/18/porting-go-web-applications-to-aws-lambda/.
Note: algnhsa requires aws-lambda-go version 1.8.1 or higher:
go get -u github.com/aws/aws-lambda-go/events