ApiwareHTTP接口定义与请求参数绑定中间件

Apiware 将 Go 语言 net/http 及 fasthttp 请求的指定参数绑定到结构体，并验证参数值的合法性。 建议您可以使用结构体作为 web 框架的 Handler，并用该中间件快速绑定请求参数，节省了大量参数类型转换与有效性验证的工作。同时还可以通过该结构体标签，创建 swagger 的 json 配置文件，轻松创建 api 文档服务。

Demo 示例

package main

import (
    "encoding/json"
    "github.com/henrylee2cn/apiware"
    // "mime/multipart"
    "net/http"
    "strings"
)

type TestApiware struct {
    Id           int         `param:"in(path),required,desc(ID),range(1:2)"`
    Num          float32     `param:"in(query),name(n),range(0.1:10.19)"`
    Title        string      `param:"in(query),nonzero"`
    Paragraph    []string    `param:"in(query),name(p),len(1:10)" regexp:"(^[\\w]*$)"`
    Cookie       http.Cookie `param:"in(cookie),name(apiwareid)"`
    CookieString string      `param:"in(cookie),name(apiwareid)"`
    // Picture   multipart.FileHeader `param:"in(formData),name(pic),maxmb(30)"`
}

var myApiware = apiware.New(pathDecodeFunc, nil, nil)

var pattern = "/test/:id"

func pathDecodeFunc(urlPath, pattern string) apiware.KV {
    idx := map[int]string{}
    for k, v := range strings.Split(pattern, "/") {
        if !strings.HasPrefix(v, ":") {
            continue
        }
        idx[k] = v[1:]
    }
    pathParams := make(map[string]string, len(idx))
    for k, v := range strings.Split(urlPath, "/") {
        name, ok := idx[k]
        if !ok {
            continue
        }
        pathParams[name] = v
    }
    return apiware.Map(pathParams)
}

func testHandler(resp http.ResponseWriter, req *http.Request) {
    // set cookies
    http.SetCookie(resp, &http.Cookie{
        Name:  "apiwareid",
        Value: "http_henrylee2cn",
    })

    // bind params
    params := new(TestApiware)
    err := myApiware.Bind(params, req, pattern)
    b, _ := json.MarshalIndent(params, "", " ")
    if err != nil {
        resp.WriteHeader(http.StatusBadRequest)
        resp.Write(append([]byte(err.Error()+"\n"), b...))
    } else {
        resp.WriteHeader(http.StatusOK)
        resp.Write(b)
    }
}

func main() {
    // Check whether `testHandler` meet the requirements of apiware, and register it
    err := myApiware.Register(new(TestApiware))
    if err != nil {
        panic(err)
    }

    // server
    http.HandleFunc("/test/0", testHandler)
    http.HandleFunc("/test/1", testHandler)
    http.HandleFunc("/test/1.1", testHandler)
    http.HandleFunc("/test/2", testHandler)
    http.HandleFunc("/test/3", testHandler)
    http.ListenAndServe(":8080", nil)
}