gopkgs/util/http.go

// Copyright 2019 getensh.com. All rights reserved.
// Use of this source code is governed by getensh.com.

package util

import (
	"bytes"
	"fmt"
	"io/ioutil"

	"github.com/gin-gonic/gin"
)

// ShouldBind 统一进行http参数解析, header, path, query, body 可为nil
func ShouldBind(ctx *gin.Context, header, path, query, body interface{}) error {
	// 解析header参数
	if header != nil {
		if err := ctx.ShouldBindHeader(header); err != nil {
			s, _ := json.MarshalToString(ctx.Request.Header)
			return fmt.Errorf("ctx.ShouldBindHeader, err: %+v, params: %s", err, s)
		}
	}

	// 解析path参数
	if path != nil {
		if err := ctx.ShouldBindUri(path); err != nil {
			s, _ := json.MarshalToString(ctx.FullPath)
			return fmt.Errorf("ctx.ShouldBindUri, err: %+v, params: %s", err, s)
		}
	}

	// 解析query参数
	if query != nil {
		if err := ctx.ShouldBindQuery(query); err != nil {
			s, _ := json.MarshalToString(ctx.Request.URL.RawQuery)
			return fmt.Errorf("ctx.ShouldBindQuery, err: %+v, params: %s", err, s)
		}
	}

	// 解析body参数
	if body != nil {
		// 读出body数据
		buf, err := ctx.GetRawData()
		if err == nil {
			ctx.Request.Body = ioutil.NopCloser(bytes.NewBuffer(buf)) // 关键: 回写body，便于后面使用
		}
		// 解析body参数，本方法会把body取完
		if err := ctx.ShouldBind(&body); err != nil {
			return fmt.Errorf("ctx.ShouldBind, err: %+v, params: %s", err, string(buf))
		}
	}

	return nil
}