432 lines
13 KiB
Go
432 lines
13 KiB
Go
// Package httpclient ...
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//
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// Description : httpclient ...
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 2024-05-31 15:22
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package httpclient
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import (
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"fmt"
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"git.zhangdeman.cn/gateway/httpclient/cache"
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"git.zhangdeman.cn/gateway/httpclient/define"
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"git.zhangdeman.cn/gateway/httpclient/validate"
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"git.zhangdeman.cn/zhangdeman/serialize"
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"github.com/go-resty/resty/v2"
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"github.com/tidwall/gjson"
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"net/http"
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"strings"
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"time"
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)
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// NewHttpClient 获取http client
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 15:27 2024/5/31
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func NewHttpClient(reqConfig *define.Request, cacheInstance cache.ICache) (*HttpClient, error) {
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// 验证配置正确性以及初始化默认值
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if err := validate.RequestConfig(reqConfig); nil != err {
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return nil, err
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}
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restyClient, restyRequest := NewRestyClient(reqConfig)
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hc := &HttpClient{
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Client: restyClient,
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request: restyRequest,
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reqConfig: reqConfig,
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http4xxHandler: make([]define.Http4xxHandler, 0),
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http5xxHandler: make([]define.Http5xxHandler, 0),
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httpBusinessErrorHandler: make([]define.HttpBusinessErrorHandler, 0),
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requestFinishHandler: make([]define.RequestFinishHandler, 0),
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cacheInstance: cacheInstance,
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}
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return hc, nil
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}
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// HttpClient 请求客户端
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 15:27 2024/5/31
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type HttpClient struct {
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*resty.Client
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request *resty.Request
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reqConfig *define.Request
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http4xxHandler []define.Http4xxHandler
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http5xxHandler []define.Http5xxHandler
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httpBusinessErrorHandler []define.HttpBusinessErrorHandler
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requestSendErrorHandler []define.RequestSendErrorHandler
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requestFinishHandler []define.RequestFinishHandler
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cacheInstance cache.ICache
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}
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// OnResponse4xx 4xx处理逻辑
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 18:20 2024/6/1
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func (hc *HttpClient) OnResponse4xx(handlerList ...define.Http4xxHandler) {
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hc.http4xxHandler = append(hc.http4xxHandler, handlerList...)
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}
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// OnResponse5xx 5xx处理逻辑
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 18:21 2024/6/1
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func (hc *HttpClient) OnResponse5xx(handlerList ...define.Http5xxHandler) {
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hc.http5xxHandler = append(hc.http5xxHandler, handlerList...)
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}
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// OnResponseBusinessError 业务错误出路逻辑
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 18:22 2024/6/1
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func (hc *HttpClient) OnResponseBusinessError(handlerList ...define.HttpBusinessErrorHandler) {
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hc.httpBusinessErrorHandler = append(hc.httpBusinessErrorHandler, handlerList...)
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}
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// OnRequestFinish 请求完成时间
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 18:36 2024/6/1
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func (hc *HttpClient) OnRequestFinish(handlerList ...define.RequestFinishHandler) {
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hc.requestFinishHandler = append(hc.requestFinishHandler, handlerList...)
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}
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// getRequestValidateMiddleware 请求验证的Middleware
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 15:40 2024/5/31
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func (hc *HttpClient) getRequestValidateMiddleware() resty.RequestMiddleware {
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return func(client *resty.Client, request *resty.Request) error {
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return nil
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}
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}
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// getResponseValidateMiddleware 获取相应数据验证的middleware
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 15:42 2024/5/31
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func (hc *HttpClient) getResponseValidateMiddleware() resty.ResponseMiddleware {
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return func(client *resty.Client, response *resty.Response) error {
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return nil
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}
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}
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// SetRestyClient 设置client
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 15:54 2024/5/31
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func (hc *HttpClient) SetRestyClient(restyClient *resty.Client) {
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hc.Client = restyClient
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}
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// GetRestyClient 获取 resty client
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 15:57 2024/5/31
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func (hc *HttpClient) GetRestyClient() *resty.Client {
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return hc.Client
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}
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// Request 发送请求
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 15:52 2024/5/31
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func (hc *HttpClient) Request() *define.Response {
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var (
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cacheResult *define.Response
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)
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if cacheResult = hc.getCacheResult(); nil != cacheResult {
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// 判断是否开启预热
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inputCachePreHeatConfig := hc.cacheInstance.PreHeatConfig()
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var cachePreHeatConfig define.CachePreHeatConfig
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serialize.JSON.TransitionIgnoreError(inputCachePreHeatConfig, &cachePreHeatConfig)
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if !cachePreHeatConfig.Enable || (cachePreHeatConfig.MinTTL <= 0 && cachePreHeatConfig.MinPercent <= 0 && !cachePreHeatConfig.Force) {
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// 无预热配置或未启用预热或者未设置预热规则
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return cacheResult
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}
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go func() {
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// 判断是否触发预热
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if cachePreHeatConfig.Force {
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_ = hc.requestBackendApi()
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return
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}
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// 将百分比的配置归一化成最小剩余时间的配置
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if cachePreHeatConfig.MinPercent > 0 {
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expectMinTTL := hc.cacheInstance.CacheTime() * cachePreHeatConfig.MinPercent / 100
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if cachePreHeatConfig.MinTTL == 0 || cachePreHeatConfig.MinTTL > expectMinTTL {
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cachePreHeatConfig.MinTTL = expectMinTTL
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}
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}
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if cachePreHeatConfig.MinTTL <= 0 {
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// 未配置最小剩余时间
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return
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}
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ttl := hc.cacheInstance.TTL(cacheResult.CacheInfo.CacheKey)
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if ttl < 0 {
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// 不存在或者未设置有效期
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return
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}
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if ttl <= cachePreHeatConfig.MinTTL {
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// 配置了最小剩余时间,并且key剩余有效期小于最小剩余时间
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_ = hc.requestBackendApi()
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}
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}()
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}
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return hc.requestBackendApi()
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}
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// requestBackendApi 请求后端接口
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 18:47 2024/10/9
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func (hc *HttpClient) requestBackendApi() *define.Response {
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hc.Client.OnBeforeRequest(hc.getRequestValidateMiddleware()) // 请求参数验证中间件必注册
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hc.Client.OnAfterResponse(hc.getResponseValidateMiddleware()) // 响应验证中间件必注册
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var (
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err error
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)
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response := hc.newResponse()
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for i := 0; i < hc.reqConfig.RetryRule.RetryCount+1; i++ {
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response.Seq++
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response.RequestCount++
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if response.RestyResponse, err = hc.request.Send(); nil != err {
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response.FailInfo = &define.ResponseFailInfo{
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Type: define.RequestFailTypeSend,
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Message: "response instance is nil",
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}
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for _, itemAfterResponse := range hc.requestFinishHandler {
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itemAfterResponse(hc.reqConfig, response)
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}
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time.Sleep(time.Duration(hc.reqConfig.RetryRule.RetryTimeInterval) * time.Millisecond)
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continue
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}
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if nil == response.RestyResponse {
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response.FailInfo = &define.ResponseFailInfo{
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Type: define.RequestFailTypeSend,
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Message: "response instance is nil",
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}
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for _, itemAfterResponse := range hc.requestFinishHandler {
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itemAfterResponse(hc.reqConfig, response)
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}
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time.Sleep(time.Duration(hc.reqConfig.RetryRule.RetryTimeInterval) * time.Millisecond)
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continue
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}
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// 解析返回信息
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hc.fillResponseHeader(response)
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hc.fillResponseCookie(response)
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hc.fillResponseBody(response)
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if response.HttpCode != http.StatusOK {
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response.FailInfo = &define.ResponseFailInfo{
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Type: define.RequestFailTypeServerError,
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Message: "http code is " + response.HttpCodeStatus + ", not success",
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}
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time.Sleep(time.Duration(hc.reqConfig.RetryRule.RetryTimeInterval) * time.Millisecond)
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continue
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}
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if !hc.isCodeSuccess(response) {
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response.FailInfo = &define.ResponseFailInfo{
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Type: define.RequestFailTypeBusinessError,
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Message: "business code is " + response.Code + ", not success",
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}
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time.Sleep(time.Duration(hc.reqConfig.RetryRule.RetryTimeInterval) * time.Millisecond)
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continue
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}
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response.IsSuccess = true //设置成功
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response.CacheInfo.SetCache, response.CacheInfo.CacheError = hc.setCacheResult(response) // 设置缓存
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break
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}
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return response
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}
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// newResponse 默认返回数据
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 17:44 2024/6/1
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func (hc *HttpClient) newResponse() *define.Response {
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return &define.Response{
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Header: map[string]string{},
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Cookie: map[string]string{},
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Body: map[string]any{},
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Code: "",
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Message: "",
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Data: "",
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HttpCode: 0,
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HttpCodeStatus: "",
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ResponseDataRule: nil,
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Seq: 0,
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RequestStartTime: 0,
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RequestFinishTime: 0,
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UsedTime: 0,
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RestyResponse: nil,
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IsSuccess: false,
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CacheInfo: &define.ResponseCacheInfo{
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IsCache: false,
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SetCache: false,
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CacheKey: "",
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CacheValue: "",
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CacheEnable: nil != hc.cacheInstance && hc.cacheInstance.Enable(),
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CacheError: nil,
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},
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RequestCount: 0,
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FailInfo: nil,
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}
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}
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// fillResponseHeader 填充响应header
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 21:30 2024/6/5
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func (hc *HttpClient) fillResponseHeader(response *define.Response) {
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response.Header = map[string]string{} // 清空已有数据
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response.HttpCode = response.RestyResponse.StatusCode() // http状态码
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response.HttpCodeStatus = response.RestyResponse.Status() // http状态码描述
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for headerName, headerValue := range response.RestyResponse.Header() {
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if len(headerValue) > 0 {
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response.Header[headerName] = headerValue[0]
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} else {
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response.Header[headerName] = ""
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}
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}
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}
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// fillResponseCookie 填充cookie
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 21:32 2024/6/5
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func (hc *HttpClient) fillResponseCookie(response *define.Response) {
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response.Cookie = map[string]string{} // 清空已有数据
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for _, cookieValue := range response.RestyResponse.Cookies() {
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response.Cookie[cookieValue.Name] = cookieValue.Value
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}
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}
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// fillResponseBody 填充响应body
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 21:38 2024/6/5
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func (hc *HttpClient) fillResponseBody(response *define.Response) {
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response.Data = string(response.RestyResponse.Body())
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response.Code = gjson.Get(response.Data, hc.reqConfig.CodeField).String()
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response.Message = gjson.Get(response.Data, hc.reqConfig.MessageField).String()
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businessData := gjson.Get(response.Data, hc.reqConfig.DataField)
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if businessData.Value() == nil {
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// data为空指针, 归一化成空对象
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response.Body = map[string]any{}
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} else {
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if businessData.IsArray() {
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// 数组类型的转换
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response.Data = fmt.Sprintf(`{"list":` + businessData.String() + "}")
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} else {
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if businessData.IsObject() {
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// 返回的就是对象
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response.Data = businessData.String()
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} else {
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// 返回是普通类型
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response.Data = serialize.JSON.MarshalForString(map[string]any{
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"value": businessData.Value(),
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})
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}
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}
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_ = serialize.JSON.UnmarshalWithNumber([]byte(response.Data), &response.Body)
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}
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response.ExtendData = map[string]string{}
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gjson.Parse(response.Data).ForEach(func(key, value gjson.Result) bool {
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if key.String() == hc.reqConfig.CodeField ||
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key.String() == hc.reqConfig.MessageField ||
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key.String() == hc.reqConfig.DataField {
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return true
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}
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response.ExtendData[key.String()] = value.String()
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return true
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})
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}
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// isHttpCodeSuccess ...
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 22:48 2024/6/6
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func (hc *HttpClient) isCodeSuccess(response *define.Response) bool {
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for _, itemSuccessCode := range hc.reqConfig.SuccessCodeList {
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if itemSuccessCode == response.Code {
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return true
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}
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}
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return false
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}
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// getCacheResult 获取缓存结果
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 16:04 2024/6/3
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func (hc *HttpClient) getCacheResult() *define.Response {
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if nil == hc.cacheInstance || !hc.cacheInstance.Enable() {
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return nil
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}
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startTime := time.Now().UnixMilli()
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cacheKey := hc.cacheInstance.GetKey(hc.reqConfig)
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cacheValue := strings.TrimSpace(hc.cacheInstance.GetValue(cacheKey))
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if len(cacheValue) == 0 {
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return nil
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}
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response := hc.newResponse()
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if err := serialize.JSON.UnmarshalWithNumber([]byte(cacheValue), response); nil != err {
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return nil
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}
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response.CacheInfo.IsCache = true // 设置缓存标记
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response.RequestStartTime = startTime // 开始时间
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response.RequestFinishTime = time.Now().UnixMilli() // 结束时间
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response.UsedTime = response.RequestFinishTime - response.RequestStartTime // 耗时
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response.CacheInfo.CacheKey = cacheKey // 缓存key
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response.CacheInfo.CacheValue = cacheValue // 缓存值
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return response
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}
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// setCacheResult ...
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 16:24 2024/6/3
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func (hc *HttpClient) setCacheResult(response *define.Response) (bool, error) {
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if nil == response || nil == hc.cacheInstance {
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return false, nil
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}
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// 全局未开启或者当前请求不支持缓存
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if !hc.cacheInstance.Enable() || !hc.cacheInstance.IsAllow(hc.reqConfig, response) {
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return false, nil
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}
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cacheKey := hc.cacheInstance.GetKey(hc.reqConfig)
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cacheValue := serialize.JSON.MarshalForString(response)
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if err := hc.cacheInstance.SetValue(cacheKey, cacheValue); nil != err {
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return false, err
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}
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response.CacheInfo.CacheKey = cacheKey
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response.CacheInfo.CacheValue = cacheValue
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return true, nil
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}
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