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https://github.com/lonng/nex
Aiming to simplify the construction of JSON API service
https://github.com/lonng/nex
dependency-injection golang handler http microservice middleware webservice
Last synced: 25 days ago
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Aiming to simplify the construction of JSON API service
- Host: GitHub
- URL: https://github.com/lonng/nex
- Owner: lonng
- Created: 2016-09-12T01:45:29.000Z (about 8 years ago)
- Default Branch: master
- Last Pushed: 2017-09-15T14:51:59.000Z (about 7 years ago)
- Last Synced: 2024-04-18T12:29:48.482Z (7 months ago)
- Topics: dependency-injection, golang, handler, http, microservice, middleware, webservice
- Language: Go
- Homepage:
- Size: 30.3 KB
- Stars: 34
- Watchers: 3
- Forks: 2
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# nex
This library aims to simplify the construction of JSON API service,
`nex.Handler` is able to wrap any function to adapt the interface of
`http.Handler`, which unmarshals POST data to a struct automatically.
## Demo
[中文示例](https://github.com/lonnng/yue)
## Benchmark
```
BenchmarkSimplePlainAdapter_Invoke-8 5000000 318 ns/op 80 B/op 2 allocs/op
BenchmarkSimpleUnaryAdapter_Invoke-8 1000000 1999 ns/op 1296 B/op 16 allocs/op
BenchmarkGenericAdapter_Invoke-8 500000 2404 ns/op 1456 B/op 17 allocs/op
BenchmarkSimplePlainAdapter_Invoke2-8 1000000 1724 ns/op 1096 B/op 11 allocs/op
BenchmarkSimpleUnaryAdapter_Invoke2-8 500000 3484 ns/op 2313 B/op 25 allocs/op
BenchmarkGenericAdapter_Invoke2-8 500000 3597 ns/op 2473 B/op 26 allocs/op
```
## Support types
```
io.ReadCloser // request.Body
http.Header // request.Header
nex.Form // request.Form
nex.PostForm // request.PostForm
*nex.Form // request.Form
*nex.PostForm // request.PostForm
*url.URL // request.URL
*multipart.Form // request.MultipartForm
*http.Request // raw request
```
## Usage
```
http.Handle("/test", nex.Handler(test))
func test(io.ReadCloser, http.Header, nex.Form, nex.PostForm, *CustomizedRequestType, *url.URL, *multipart.Form) (*CustomizedResponseType, error)
```
## Example
```go
package main
import (
"errors"
"fmt"
"io"
"net/http"
"net/url"
"github.com/lonnng/nex"
)
type LoginRequest struct {
Username string `json:"username"`
Password string `json:"password"`
}
type LoginResponse struct {
Result string `json:"result"`
}
type ErrorMessage struct {
Code int `json:"code"`
Error string `json:"error"`
}
func main() {
// customize error encoder
nex.SetErrorEncoder(func(err error) interface{} {
return &ErrorMessage{Code: -1, Error: err.Error()}
})
// global middleware
nex.Before(before1, before2)
nex.After(after1, after2)
mux := http.NewServeMux()
mux.Handle("/test1", nex.Handler(test1))
mux.Handle("/test2", nex.Handler(test2))
mux.Handle("/test3", nex.Handler(test3))
mux.Handle("/test4", nex.Handler(test4))
mux.Handle("/test5", nex.Handler(test5))
mux.Handle("/test6", nex.Handler(test6))
mux.Handle("/test7", nex.Handler(test7))
mux.Handle("/test8", nex.Handler(test8))
// add middleware
mux.Handle("/test9", nex.Handler(test8).Before(before1, before2).After(after1, after2))
logic := func(ctx context.Context) (context.Context, *testResponse, error) {
println(ctx.Value("key").(string))
println(ctx.Value("key2").(string))
return context.WithValue(ctx, "logic", "logic-value"), &testResponse{}, nil
}
before1 := func(ctx context.Context, request *http.Request) (context.Context, error) {
return context.WithValue(ctx, "key", "value"), nil
}
before2 := func(ctx context.Context, request *http.Request) (context.Context, error) {
println(ctx.Value("key").(string))
return context.WithValue(ctx, "key2", "value2"), nil
}
after1 := func(ctx context.Context, w http.ResponseWriter) (context.Context, error) {
println(ctx.Value("key").(string))
println(ctx.Value("key2").(string))
println(ctx.Value("logic").(string))
return context.WithValue(ctx, "after1", "after1-value"), nil
}
after2 := func(ctx context.Context, w http.ResponseWriter) (context.Context, error) {
println(ctx.Value("key").(string))
println(ctx.Value("key2").(string))
println(ctx.Value("logic").(string))
println(ctx.Value("after1").(string))
return context.WithValue(ctx, "key", "value"), nil
}
handler := Handler(logic).Before(before1, before2).After(after1, after2)
mux.Handle("/context", handler)
http.ListenAndServe(":8080", mux)
}
// POST: regular response
func test1(m *LoginRequest) (*LoginResponse, error) {
fmt.Printf("%+v\n", m)
return &LoginResponse{Result: "success"}, nil
}
// POST: error response
func test2(m *LoginRequest) (*LoginResponse, error) {
fmt.Printf("%+v\n", m)
return nil, errors.New("error test")
}
// GET: regular response
func test3() (*LoginResponse, error) {
return &LoginResponse{Result: "success"}, nil
}
// GET: error response
func test4() (*LoginResponse, error) {
return nil, errors.New("error test")
}
func test5(header http.Header) (*LoginResponse, error) {
fmt.Printf("%#v\n", header)
return &LoginResponse{Result: "success"}, nil
}
func test6(form nex.Form) (*LoginResponse, error) {
fmt.Printf("%#v\n", form)
// use form helper method
// start := query.IntOrDefault("start", 0)
// count := query.IntOrDefault("count", -1)
return &LoginResponse{Result: "success"}, nil
}
func test7(header http.Header, form nex.Form, body io.ReadCloser) (*LoginResponse, error) {
fmt.Printf("%#v\n", header)
fmt.Printf("%#v\n", form)
return &LoginResponse{Result: "success"}, nil
}
func test8(header http.Header, r *LoginResponse, url *url.URL) (*LoginResponse, error) {
fmt.Printf("%#v\n", header)
fmt.Printf("%#v\n", r)
fmt.Printf("%#v\n", url)
return &LoginResponse{Result: "success"}, nil
}
```
```
curl -XPOST -d '{"username":"test", "password":"test"}' http://localhost:8080/test1
curl -XPOST -d '{"username":"test", "password":"test"}' http://localhost:8080/test2
curl http://localhost:8080/test3
curl http://localhost:8080/test4
curl http://localhost:8080/test5
curl http://localhost:8080/test6\?test\=test
curl http://localhost:8080/test7\?test\=tset
curl -XPOST -d '{"username":"test", "password":"test"}' http://localhost:8080/test8\?test\=test
```
## License
Copyright (c) <2016>
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
Software, and to permit persons to whom the Software is furnished to do so, subject
to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.