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go-server.routers.mustache Maven / Gradle / Ivy
{{>partial_header}}
package {{packageName}}
import (
"encoding/json"
"errors"
{{#routers}}
{{#mux}}
"github.com/gorilla/mux"
{{#featureCORS}}
"github.com/gorilla/handlers"
{{/featureCORS}}
{{/mux}}
{{#chi}}
"github.com/go-chi/chi/v5"
"github.com/go-chi/chi/v5/middleware"
{{#featureCORS}}
"github.com/go-chi/cors"
{{/featureCORS}}
{{/chi}}
{{/routers}}
"io/ioutil"
"mime/multipart"
"net/http"
"os"
"strconv"
"strings"
)
// A Route defines the parameters for an api endpoint
type Route struct {
Name string
Method string
Pattern string
HandlerFunc http.HandlerFunc
}
// Routes are a collection of defined api endpoints
type Routes []Route
// Router defines the required methods for retrieving api routes
type Router interface {
Routes() Routes
}
const errMsgRequiredMissing = "required parameter is missing"
// NewRouter creates a new router for any number of api routers
func NewRouter(routers ...Router) {{#routers}}{{#mux}}*mux.Router{{/mux}}{{#chi}}chi.Router{{/chi}}{{/routers}} {
{{#routers}}
{{#mux}}
router := mux.NewRouter().StrictSlash(true)
{{/mux}}
{{#chi}}
router := chi.NewRouter()
router.Use(middleware.Logger)
{{#featureCORS}}
router.Use(cors.Handler(cors.Options{}))
{{/featureCORS}}
{{/chi}}
{{/routers}}
for _, api := range routers {
for _, route := range api.Routes() {
var handler http.Handler
handler = route.HandlerFunc
{{#routers}}
{{#mux}}
handler = Logger(handler, route.Name)
{{#featureCORS}}
handler = handlers.CORS()(handler)
{{/featureCORS}}
router.
Methods(route.Method).
Path(route.Pattern).
Name(route.Name).
Handler(handler)
{{/mux}}
{{#chi}}
router.Method(route.Method, route.Pattern, handler)
{{/chi}}
{{/routers}}
}
}
return router
}
// EncodeJSONResponse uses the json encoder to write an interface to the http response with an optional status code
func EncodeJSONResponse(i interface{}, status *int,{{#addResponseHeaders}} headers map[string][]string,{{/addResponseHeaders}} w http.ResponseWriter) error {
{{#addResponseHeaders}}
wHeader := w.Header()
if headers != nil {
for key, values := range headers {
for _, value := range values {
wHeader.Add(key, value)
}
}
}
wHeader.Set("Content-Type", "application/json; charset=UTF-8")
{{/addResponseHeaders}}
{{^addResponseHeaders}}
w.Header().Set("Content-Type", "application/json; charset=UTF-8")
{{/addResponseHeaders}}
if status != nil {
w.WriteHeader(*status)
} else {
w.WriteHeader(http.StatusOK)
}
if i != nil {
return json.NewEncoder(w).Encode(i)
}
return nil
}
// ReadFormFileToTempFile reads file data from a request form and writes it to a temporary file
func ReadFormFileToTempFile(r *http.Request, key string) (*os.File, error) {
_, fileHeader, err := r.FormFile(key)
if err != nil {
return nil, err
}
return readFileHeaderToTempFile(fileHeader)
}
// ReadFormFilesToTempFiles reads files array data from a request form and writes it to a temporary files
func ReadFormFilesToTempFiles(r *http.Request, key string) ([]*os.File, error) {
if err := r.ParseMultipartForm(32 << 20); err != nil {
return nil, err
}
files := make([]*os.File, 0, len(r.MultipartForm.File[key]))
for _, fileHeader := range r.MultipartForm.File[key] {
file, err := readFileHeaderToTempFile(fileHeader)
if err != nil {
return nil, err
}
files = append(files, file)
}
return files, nil
}
// readFileHeaderToTempFile reads multipart.FileHeader and writes it to a temporary file
func readFileHeaderToTempFile(fileHeader *multipart.FileHeader) (*os.File, error) {
formFile, err := fileHeader.Open()
if err != nil {
return nil, err
}
defer formFile.Close()
fileBytes, err := ioutil.ReadAll(formFile)
if err != nil {
return nil, err
}
file, err := ioutil.TempFile("", fileHeader.Filename)
if err != nil {
return nil, err
}
defer file.Close()
file.Write(fileBytes)
return file, nil
}
// parseInt64Parameter parses a string parameter to an int64.
func parseInt64Parameter(param string, required bool) (int64, error) {
if param == "" {
if required {
return 0, errors.New(errMsgRequiredMissing)
}
return 0, nil
}
return strconv.ParseInt(param, 10, 64)
}
// parseInt32Parameter parses a string parameter to an int32.
func parseInt32Parameter(param string, required bool) (int32, error) {
if param == "" {
if required {
return 0, errors.New(errMsgRequiredMissing)
}
return 0, nil
}
val, err := strconv.ParseInt(param, 10, 32)
if err != nil {
return -1, err
}
return int32(val), nil
}
// parseBoolParameter parses a string parameter to a bool
func parseBoolParameter(param string, required bool) (bool, error) {
if param == "" {
if required {
return false, errors.New(errMsgRequiredMissing)
}
return false, nil
}
val, err := strconv.ParseBool(param)
if err != nil {
return false, err
}
return bool(val), nil
}
// parseInt64ArrayParameter parses a string parameter containing array of values to []int64.
func parseInt64ArrayParameter(param, delim string, required bool) ([]int64, error) {
if param == "" {
if required {
return nil, errors.New(errMsgRequiredMissing)
}
return nil, nil
}
str := strings.Split(param, delim)
ints := make([]int64, len(str))
for i, s := range str {
if v, err := strconv.ParseInt(s, 10, 64); err != nil {
return nil, err
} else {
ints[i] = v
}
}
return ints, nil
}
// parseInt32ArrayParameter parses a string parameter containing array of values to []int32.
func parseInt32ArrayParameter(param, delim string, required bool) ([]int32, error) {
if param == "" {
if required {
return nil, errors.New(errMsgRequiredMissing)
}
return nil, nil
}
str := strings.Split(param, delim)
ints := make([]int32, len(str))
for i, s := range str {
if v, err := strconv.ParseInt(s, 10, 32); err != nil {
return nil, err
} else {
ints[i] = int32(v)
}
}
return ints, nil
}
