looli

looli

looli is a minimalist web framework for golang.

Feature

• Router
  • full method support
  • named parameter
  • wildcard pattern
  • trailing slash redirect
  • case sensitive
  • serving static files
• Context
  • query and form
  • header and cookie
  • data binding
  • string xml json rendering
  • html rendering
• Middleware
  • using middleware
  • builtin middlewares
  • custome middleware

Installation

go get github.com/cssivision/looli

Usage

Router

looli build on the top of router library, which support Named parameters Wildcard parameters Trailing slash redirect Case sensitive Prefix router, for detail.

Using GET, POST, PUT, PATCH, DELETE and OPTIONS

package main

import (
	"github.com/cssivision/looli"
	"log"
)

func main() {
	router := looli.Default()

	router.Get("/a", func(c *looli.Context) {})
	router.Post("/a", func(c *looli.Context) {})
	router.Put("/a", func(c *looli.Context) {})
	router.Delete("/a", func(c *looli.Context) {})
	router.Patch("/a", func(c *looli.Context) {})
	router.Head("/a", func(c *looli.Context) {})
	router.Options("/a", func(c *looli.Context) {})

	log.Fatal(router.Run(":8080"))
}

Named parameter

Named parameters only match a single path segment:

Pattern: /user/:name

 /user/gordon              match
 /user/you                 match
 /user/gordon/profile      no match
 /user/                    no match

Pattern: /:user/:name

 /a/gordon                 match
 /b/you                    match
 /user/gordon/profile      no match
 /user/                    no match

package main

import (
    "net/http"
    "github.com/cssivision/looli"
)

func main() {
    router := looli.Default()

    router.Get("/a/:name", func(c *looli.Context) {
        c.Status(200)
        c.String("hello " + c.Param("name") + "!\n")
    })

    http.ListenAndServe(":8080", router)
}

Wildcard pattern

Match everything, therefore they must always be at the end of the pattern:

Pattern: /src/*filepath

 /src/                     match
 /src/somefile.go          match
 /src/subdir/somefile.go   match

package main

import (
    "net/http"
    "github.com/cssivision/looli"
)

func main() {
    router := looli.Default()

    router.Get("/a/*filepath", func(c *looli.Context) {
        c.Status(200)
        c.String("hello " + c.Param("filepath") + "!\n")
    })

    http.ListenAndServe(":8080", router)
}

Trailing slash redirect

By default will redirect, which means if we register path /a/b, we can request with /a/b/, conversely also success. redirect will work only in the situation that the request can not found, if both define path /a/b and /a/b/, redirect will not work.

/a/b -> /a/b/
/a/b/ -> /a/b

package main

import (
    "net/http"
    "github.com/cssivision/looli"
)

func main() {
    router := looli.Default()

    // default is true, we can forbidden this behavior by set is to false
    // request with /a/ will get 404
    router.SetTrailingSlashRedirect(false)

    router.Get("/a", func(c *looli.Context) {
        c.Status(200)
        c.String("hello world!\n")
    })

    http.ListenAndServe(":8080", router)
}

Case sensitive

By default is not case sensitive, which means if we register path /a/b, request with /A/B will get 404 not found. if we set true, request path with /A/B will success.

package main

import (
    "net/http"
    "github.com/cssivision/looli"
)

func main() {
    router := looli.Default()

    // default is false, we can forbidden this behavior by set is to true
    // request with /A/ will success.
    router.SetIgnoreCase(true)

    router.Get("/a", func(c *looli.Context) {
        c.Status(200)
        c.String("hello world!\n")
    })

    http.ListenAndServe(":8080", router)
}

Prefix router

Group router using prefix

package main

import (
    "net/http"
    "github.com/cssivision/looli"
)

func main() {
    router := looli.Default()

    v1 := router.Prefix("/v1")
    v1.Get("/a", func(c *looli.Context) {
        c.Status(200)
        c.String("hello world version1\n")
    })

    v2 := router.Prefix("/v2")
    v2.Get("/a", func(c *looli.Context) {
        c.Status(200)
        c.String("hello world version2\n")
    })

    router.Get("/a", func(c *looli.Context) {
        c.Status(200)
        c.String("hello world!\n")
    })

    http.ListenAndServe(":8080", router)
}

Serving static files

package main

import (
    "net/http"
    "github.com/cssivision/looli"
)

func main() {
    router := looli.Default()

    // Serve file in the path
    router.StaticFile("/somefile.go", "file/path")

    // Serve files in staic directory
    router.Static("/static", "./static")

    http.ListenAndServe(":8080", router)
}

Context

Context supply some syntactic sugar.

Query and Form

package main

import (
    "net/http"
    "github.com/cssivision/looli"
)

func main() {
    router := looli.Default()

    router.Get("/query", func(c *looli.Context) {
        id := c.Query("id")
        name := c.DefaultQuery("name", "cssivision")
        c.Status(200)
        c.String("hello %s, %s\n", id, name)
    })

    router.Post("/form", func(c *looli.Context) {
        name := c.DefaultPostForm("name", "somebody")
        age := c.PostForm("age")
        c.Status(200)
        c.JSON(looli.JSON{
            "name": name,
            "age": age,
        })
    })

    http.ListenAndServe(":8080", router)
}

query

curl 'localhost:8080/query?id=1&name=cssivision'

form

curl -d 'age=21&other=haha' 'localhost:8080/form?id=1&name=cssivision'

Header and Cookie

Use method to operate header and cookie

package main

import (
    "fmt"
    "github.com/cssivision/looli"
    "log"
    "net/http"
)

func main() {
    router := looli.Default()

    router.Get("/header", func(c *looli.Context) {
        fmt.Println(c.Header("User-Agent"))
        c.SetHeader("fake-header", "fake")
        c.Status(200)
        c.String("fake header has setted\n")
    })

    router.Get("/cookie", func(c *looli.Context) {
        val, _ := c.Cookie("fake-cookie")
        fmt.Println(val)
        c.SetCookie(&http.Cookie{
            Name: "fake-cookie",
            Value: "fake",
        })
        c.Status(200)
        c.String("fake cookie has setted\n")
    })

    log.Fatal(router.Run(":8080"))
}

Data binding

To bind a request into a type, use data binding, data can from query, post body. currently support binding of JSON, XML and standard form values (x-www-form-urlencoded and multipart/form-data). When using the Bind-method, the binder depending on the Content-Type header.

Note that you need to set the corresponding binding tag on all fields you want to bind. For example, when binding from JSON, set json:"fieldname".

The Validation of the incoming data show below.

package main

import (
    "fmt"
    "github.com/cssivision/looli"
    "net/http"
)

type Infomation struct {
    Name string`json:"name"`
    Age int`json:"age"`
}

func (i *Infomation) Validate() error {
    // data validate，
    return nil
}

func main() {
    router := looli.Default()

    // curl 'localhost:8080/query?name=cssivision&age=21'
    router.Get("/query", func(c *looli.Context) {
        query := new(Infomation)
        if err := c.Bind(query); err != nil {
            fmt.Println(err)
            return
        }
        fmt.Println(query.Name)
        fmt.Println(query.Age)
        c.Status(200)
        c.JSON(query)
    })

    // curl -d "name=cssivision&age=21" 'localhost:8080/form'
    router.Post("/form", func(c *looli.Context) {
        form := new(Infomation)
        if err := c.Bind(form); err != nil {
            fmt.Println(err)
            return
        }
        fmt.Println(form.Name)
        fmt.Println(form.Age)
        c.Status(200)
        c.JSON(form)
    })

    // curl  -H "Content-Type: application/json" -X POST -d '{"name":"cssivision","age":21}' localhost:8080/json
    router.Post("/json", func(c *looli.Context) {
        json := new(Infomation)
        if err := c.Bind(json); err != nil {
            fmt.Println(err)
            return
        }
        fmt.Println(json.Name)
        fmt.Println(json.Age)
        c.Status(200)
        c.JSON(json)
    })

    http.ListenAndServe(":8080", router)
}

String JSON rendering

package main

import (
    "github.com/cssivision/looli"
    "net/http"
)

func main() {
    router := looli.Default()

    router.Get("/string", func(c *looli.Context) {
        c.String("the response is %s\n", "string")
    })

    router.Get("/json1", func(c *looli.Context) {
        c.JSON(looli.JSON{
            "name": "cssivision",
            "age": 21,
        })
    })

    router.Get("/json2", func(c *looli.Context) {
        var msg struct {
            Name string`json:"name"`
            Age int`json:"age"`
        }

        msg.Name = "cssivision"
        msg.Age = 21

        c.JSON(msg)
    })

    http.ListenAndServe(":8080", router)
}

HTML rendering

package main

import (
    "github.com/cssivision/looli"
    "net/http"
)

func main() {
    router := looli.Default()

    router.LoadHTMLGlob("templates/*")
    router.Get("/html", func(c *looli.Context) {
        c.HTML("index.tmpl", looli.JSON{
            "title": "my site",
        })
    })

    http.ListenAndServe(":8080", router)
}

templates/index.tmpl

<html>
    <h1>
        {{ .title }}
    </h1>
</html>

Middleware

looli.Default() with middleware Logger() Recover() by default, without middleware use looli.New() instead.

Using middleware

package main

import (
    "net/http"
    "github.com/cssivision/looli"
    "log"
)

func main() {
    router := looli.New()

    // global middleware
    router.Use(looli.Logger())
    router.Get("/a", func(c *looli.Context) {
        c.Status(200)
        c.String("hello world!\n")
    })

    // multi handler for specificed path
    router.Get("/b", func(c *looli.Context) {
        c.String("first handler\n")
    }, func(c *looli.Context) {
        c.String("second handler\n")
    })

    v1 := router.Prefix("/v1")

    // recover middleware only work for /v1 prefix router
    v1.Use(looli.Recover())
    v1.Get("/a", func(c *looli.Context) {
        panic("error!")
        c.Status(200)
        c.String("hello world!\n")
    })

    log.Fatal(http.ListenAndServe(":8080", router))
}

Builtin middlewares

• Logger middleware
• Recover middleware
• Session middleware
• Cors middleware
• Csrf middleware

Custome middleware

package main

import (
    "log"
    "net/http"
    "github.com/cssivision/looli"
    "time"
)

func Logger() looli.HandlerFunc {
    return func(c *looli.Context) {
        t := time.Now()
        // before request
        c.Next()
        // after request
        latency := time.Since(t)
        log.Print(latency)
    }
}

func main() {
    router := looli.New()

    // global middleware
    router.Use(Logger())
    router.Get("/a", func(c *looli.Context) {
        c.Status(200)
        c.String("hello world!\n")
    })

    http.ListenAndServe(":8080", router)
}

Licenses

All source code is licensed under the MIT License.

Todo

• elegant error handle