# All files / src/browser replace.ts

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20.55% Branches 15/73
42.42% Functions 14/33
39.84% Lines 49/123

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     import { _global, on, getTimestamp, replaceOld, throttle, getLocationHref, isExistProperty, variableTypeDetection, supportsHistory } from '../utils/index'
    import { voidFun, EVENTTYPES, HTTPTYPE, HTTP_CODE } from '../common/constant'
    import { transportData } from '../core/transportData'
    import { options, setTraceId } from '../core/options'
    import { EMethods } from '../types/options'
    import { ReplaceHandler, subscribeEvent, triggerHandlers } from '../common/subscribe'
    import { MITOHttp, MITOXMLHttpRequest } from '../types/common'

    const clickThrottle = throttle(triggerHandlers, 600)

    function isFilterHttpUrl(url: string) {
      return options.filterXhrUrlRegExp && options.filterXhrUrlRegExp.test(url)
    }

    function replace(type: EVENTTYPES) {
      switch (type) {
        case EVENTTYPES.XHR:
          xhrReplace()
          break
        case EVENTTYPES.FETCH:
          fetchReplace()
          break
        case EVENTTYPES.ERROR:
          listenError()
          break
        case EVENTTYPES.CONSOLE:
          consoleReplace()
          break
        case EVENTTYPES.HISTORY:
          historyReplace()
          break
        case EVENTTYPES.UNHANDLEDREJECTION:
          unhandledrejectionReplace()
          break
        case EVENTTYPES.DOM:
          domReplace()
          break
        case EVENTTYPES.HASHCHANGE:
          listenHashchange()
          break
        default:
          break
      }
    }

    export function addReplaceHandler(handler: ReplaceHandler) {
      if (!subscribeEvent(handler)) return
      replace(handler.type as EVENTTYPES)
    }

    function xhrReplace(): void {
      Iif (!('XMLHttpRequest' in _global)) {
        return
      }
      const originalXhrProto = XMLHttpRequest.prototype
      replaceOld(
        originalXhrProto,
        'open',
        (originalOpen: voidFun): voidFun => {
          return function (this: MITOXMLHttpRequest, ...args: any[]): void {
            this.mito_xhr = {
              method: variableTypeDetection.isString(args[0]) ? args[0].toUpperCase() : args[0],
              url: args[1],
              sTime: getTimestamp(),
              type: HTTPTYPE.XHR
            }
            // this.ontimeout = function () {
            //   console.log('超时', this)
            // }
            // this.timeout = 10000
            // on(this, EVENTTYPES.ERROR, function (this: MITOXMLHttpRequest) {
            //   if (this.mito_xhr.isSdkUrl) return
            //   this.mito_xhr.isError = true
            //   const eTime = getTimestamp()
            //   this.mito_xhr.time = eTime
            //   this.mito_xhr.status = this.status
            //   this.mito_xhr.elapsedTime = eTime - this.mito_xhr.sTime
            //   triggerHandlers(EVENTTYPES.XHR, this.mito_xhr)
            //   logger.error(`接口错误,接口信息:${JSON.stringify(this.mito_xhr)}`)
            // })
            originalOpen.apply(this, args)
          }
        }
      )
      replaceOld(
        originalXhrProto,
        'send',
        (originalSend: voidFun): voidFun => {
          return function (this: MITOXMLHttpRequest, ...args: any[]): void {
            const { method, url } = this.mito_xhr
            setTraceId(url, (headerFieldName: string, traceId: string) => {
              this.mito_xhr.traceId = traceId
              this.setRequestHeader(headerFieldName, traceId)
            })
            options.beforeAppAjaxSend && options.beforeAppAjaxSend({ method, url }, this)
            on(this, 'loadend', function (this: MITOXMLHttpRequest) {
              if ((method === EMethods.Post && transportData.isSdkTransportUrl(url)) || isFilterHttpUrl(url)) return
              const { responseType, response, status } = this
              this.mito_xhr.reqData = args[0]
              const eTime = getTimestamp()
              this.mito_xhr.time = eTime
              this.mito_xhr.status = status
              if (['', 'json', 'text'].indexOf(responseType) !== -1) {
                this.mito_xhr.responseText = typeof response === 'object' ? JSON.stringify(response) : response
              }
              this.mito_xhr.elapsedTime = eTime - this.mito_xhr.sTime
              triggerHandlers(EVENTTYPES.XHR, this.mito_xhr)
            })
            originalSend.apply(this, args)
          }
        }
      )
    }

    function fetchReplace(): void {
      Eif (!('fetch' in _global)) {
        return
      }
      replaceOld(_global, EVENTTYPES.FETCH, (originalFetch: voidFun) => {
        return function (url: string, config: Partial<Request> = {}): void {
          const sTime = getTimestamp()
          const method = (config && config.method) || 'GET'
          let handlerData: MITOHttp = {
            type: HTTPTYPE.FETCH,
            method,
            reqData: config && config.body,
            url
          }
          const headers = new Headers(config.headers || {})
          Object.assign(headers, {
            setRequestHeader: headers.set
          })
          setTraceId(url, (headerFieldName: string, traceId: string) => {
            handlerData.traceId = traceId
            headers.set(headerFieldName, traceId)
          })
          options.beforeAppAjaxSend && options.beforeAppAjaxSend({ method, url }, headers)
          config = {
            ...config,
            headers
          }

          return originalFetch.apply(_global, [url, config]).then(
            (res: Response) => {
              const tempRes = res.clone()
              const eTime = getTimestamp()
              handlerData = {
                ...handlerData,
                elapsedTime: eTime - sTime,
                status: tempRes.status,
                // statusText: tempRes.statusText,
                time: eTime
              }
              tempRes.text().then((data) => {
                if (method === EMethods.Post && transportData.isSdkTransportUrl(url)) return
                if (isFilterHttpUrl(url)) return
                handlerData.responseText = tempRes.status > HTTP_CODE.UNAUTHORIZED && data
                triggerHandlers(EVENTTYPES.FETCH, handlerData)
              })
              return res
            },
            (err: Error) => {
              const eTime = getTimestamp()
              if (method === EMethods.Post && transportData.isSdkTransportUrl(url)) return
              if (isFilterHttpUrl(url)) return
              handlerData = {
                ...handlerData,
                elapsedTime: eTime - sTime,
                status: 0,
                // statusText: err.name + err.message,
                time: eTime
              }
              triggerHandlers(EVENTTYPES.FETCH, handlerData)
              throw err
            }
          )
        }
      })
    }

    function listenHashchange(): void {
      Iif (!isExistProperty(_global, 'onpopstate')) {
        on(_global, EVENTTYPES.HASHCHANGE, function (e: HashChangeEvent) {
          triggerHandlers(EVENTTYPES.HASHCHANGE, e)
        })
      }
    }

    function listenError(): void {
      on(
        _global,
        'error',
        function (e: ErrorEvent) {
          triggerHandlers(EVENTTYPES.ERROR, e)
        },
        true
      )
    }

    function consoleReplace(): void {
      Iif (!('console' in _global)) {
        return
      }
      const logType = ['log', 'debug', 'info', 'warn', 'error', 'assert']
      logType.forEach(function (level: string): void {
        Iif (!(level in _global.console)) return
        replaceOld(_global.console, level, function (originalConsole: () => any): Function {
          return function (...args: any[]): void {
            if (originalConsole) {
              triggerHandlers(EVENTTYPES.CONSOLE, { args, level })
              originalConsole.apply(_global.console, args)
            }
          }
        })
      })
    }
    // 上一次的路由
    let lastHref: string
    lastHref = getLocationHref()
    function historyReplace(): void {
      Iif (!supportsHistory()) return
      const oldOnpopstate = _global.onpopstate
      _global.onpopstate = function (this: WindowEventHandlers, ...args: any[]): any {
        const to = getLocationHref()
        const from = lastHref
        triggerHandlers(EVENTTYPES.HISTORY, {
          from,
          to
        })
        oldOnpopstate && oldOnpopstate.apply(this, args)
      }
      function historyReplaceFn(originalHistoryFn: voidFun): voidFun {
        return function (this: History, ...args: any[]): void {
          const url = args.length > 2 ? args[2] : undefined
          if (url) {
            const from = lastHref
            const to = String(url)
            lastHref = to
            triggerHandlers(EVENTTYPES.HISTORY, {
              from,
              to
            })
          }
          return originalHistoryFn.apply(this, args)
        }
      }
      replaceOld(_global.history, 'pushState', historyReplaceFn)
      replaceOld(_global.history, 'replaceState', historyReplaceFn)
    }

    function unhandledrejectionReplace(): void {
      on(_global, EVENTTYPES.UNHANDLEDREJECTION, function (ev: PromiseRejectionEvent) {
        // ev.preventDefault() 阻止默认行为后，控制台就不会再报红色错误
        triggerHandlers(EVENTTYPES.UNHANDLEDREJECTION, ev)
      })
    }

    function domReplace(): void {
      if (!('document' in _global)) return
      on(
        _global.document,
        'click',
        function () {
          clickThrottle(EVENTTYPES.DOM, {
            category: 'click',
            data: this
          })
        },
        true
      )
      // 暂时不需要keypress的重写
      // on(
      //   _global.document,
      //   'keypress',
      //   function (e: MITOElement) {
      //     keypressThrottle('dom', {
      //       category: 'keypress',
      //       data: this
      //     })
      //   },
      //   true
      // )
    }