Question

我的操作文件中有以下操作。

import axios from 'axios';
import $ from 'jquery';
var CancelToken = axios.CancelToken;
var source = CancelToken.source();

export const FETCH_WORKERJOBS = 'fetch_workerjobs';

export function fetchWorkerJobs(page, size, where, sort) {
    const request = axios.get(`/api/user/report/comms/matrix/upload/format/json?quiet=1&page=`+page+`&size=`+size+`&where=`+JSON.stringify(where)+`&sort=`+sort,{cancelToken: source.token});   
    return {
        type: FETCH_WORKERJOBS,
        payload: request
    };
}

export const FETCH_WORKERJOBS_COUNT = 'fetch_workerjobs_count';

export function fetchWorkerJobsCount(where) {
    const request = axios.get(`/api/user/report/comms/matrix/upload/count/format/json?quiet=1&where=`+JSON.stringify(where), {cancelToken: source.token});  
    return {
        type: FETCH_WORKERJOBS_COUNT,
        payload: request
    };
}

如何在将函数导入组件

时访问要取消的cancel标记

import _ from 'lodash';
import React, { Component } from 'react';
import { connect } from 'react-redux';
import { fetchWorkerJobs, fetchWorkerJobsCount } from '../../actions';
import { Link } from 'react-router-dom';
import { bindActionCreators } from 'redux';
import { Button, ButtonToolbar, Modal } from 'react-bootstrap';
import FontAwesome from 'react-fontawesome';
import {
    BootstrapTable,
    TableHeaderColumn,
    InsertModalHeader,
    InsertModalFooter
} from 'react-bootstrap-table';
import 'react-bootstrap-table/dist/react-bootstrap-table-all.min.css';
import $ from 'jquery';

const jobType = {
        }

class WorkerJobs extends Component {
    constructor(props) {
        super(props);
        this.workerJobs = [];
        this.state = {
            data: [],
            show: false,
            showError: false,
            errorMsg: '',
            errorTitle: '',
            record: {},
            showEdit: false,
            confirm: {
                body: '',
                show: false,
                id: ''
            },
            totalDataSize: 0,
            currentPage: 1

        };
        this.where = {};
        this.sort = 'worker_job_id desc';
        this.meta = { title: 'Report - Worker Jobs', description: 'List of jobs processed' };
        this.error = {show: false,msg:''};
        this.passMetaBack = this.passMetaBack.bind(this);
        this.options = {
            defaultSortName: 'worker_job_id', // default sort column name
            defaultSortOrder: 'desc', // default sort order
            page: 1,
            paginationShowsTotal: true,
            sizePerPage: 10,
            sizePerPageList: [10,25,50],
            onPageChange: this.onPageChange.bind(this),
            onSizePerPageList: this.onSizePerPageList.bind(this),
            onFilterChange: this.onFilterChange.bind(this),
            onSortChange: this.onSortChange.bind(this)
        };

        this.fetchWorkerJobs = this.fetchWorkerJobs.bind(this);

        this.runOnce = false;
    }

    onPageChange(page, sizePerPage) {
        const currentIndex = (page - 1) * sizePerPage;
        this.options.page = page;
        console.log(this.props);
        this.props.fetchWorkerJobsCount.cancel(); //not working
        this.props.fetchWorkerJobs.cancel(); //not working
        console.log(this.props);
        this.fetchWorkerJobs(page, sizePerPage, this.where, this.sort);
      }

    onSizePerPageList(sizePerPage) {
        const currentIndex = (this.state.currentPage - 1) * sizePerPage;
        this.options.sizePerPage = sizePerPage;
        this.fetchWorkerJobs(this.options.page, sizePerPage, this.where, this.sort);
      }

    onFilterChange(filterObj) {

        let where = {};
        for (const key in filterObj) {
            where[key] = filterObj[key].value;
        }
        this.where = where;
        this.fetchWorkerJobs(this.options.page,this.options.sizePerPage,this.where, this.sort);
      }

    onSortChange(sortName, sortOrder) {
        this.sort = sortName + " " + sortOrder;
        this.fetchWorkerJobs(this.options.page,this.options.sizePerPage,this.where, this.sort);
      }



    fetchWorkerJobs(page, size, where, sort){
        let self = this;   
        this.props.fetchWorkerJobsCount(where).then(function(response){
            let data = response.payload.data;
            if(data.header.error){
                //@todo show error on input form
                //self.handleShowError(data.header.message);                
            }else{
                return data.body.recordset.record;

            }
        })
        .then((count)=>{
            this.props.fetchWorkerJobs(page, size, where, sort).then(function(response){
                let data = response.payload.data;
                if(data.header.error){
                    //@todo show error on input form
                    //self.handleShowError(data.header.message);                
                }else{
                    self.options.page = page;
                    self.options.sizePerPage = size;
                    self.workerJobs = data.body.recordset.record;
                    self.setState({
                        data : data.body.recordset.record,
                        totalDataSize : count
                    });
                }
            });
        });

    }

    moveElement() {
      //store a this ref, and
      var _this = this;
      //wait for a paint to do scrolly stuff
      window.requestAnimationFrame(function() {
          if($(".react-bs-table-tool-bar").length > 0){
              if($(".react-bs-table-tool-bar .react-bs-table-sizePerPage-dropdown").length <= 0){

                  $(".react-bs-table-sizePerPage-dropdown").prependTo(".react-bs-table-tool-bar");
              }
          }
      });
    }

    renderTable(services) {

        return (
            <BootstrapTable
                keyField="worker_job_id"
                data={services}
                remote
                //multiColumnSearch
                fetchInfo={ { dataTotalSize: this.state.totalDataSize } }
                options={this.options}
                pagination
                striped
                hover
                //insertRow
                //search
                tableHeaderClass="table-vf thead"
                exportCSV
                tableContainerClass="report_workerjobs"
            >
                <TableHeaderColumn dataField="worker_job_id" dataSort={true} width={`60px`}>
                    #
                </TableHeaderColumn>
                <TableHeaderColumn dataField="job" filter={ { type: 'SelectFilter', options: jobType } }>Job</TableHeaderColumn>
                <TableHeaderColumn dataField="filename">Filename</TableHeaderColumn>
                <TableHeaderColumn
                    dataField="flag"
                    filter={{ type: 'TextFilter', defaultValue: 'C' }}
                    width={`60px`}
                >
                    Flag
                </TableHeaderColumn>
                <TableHeaderColumn dataField="total_time_taken" width={`125px`}>Total Time Taken</TableHeaderColumn>
                <TableHeaderColumn dataField="output" width={`100px`}>Analysis</TableHeaderColumn>
                <TableHeaderColumn dataField="ts_created">Created</TableHeaderColumn>
                <TableHeaderColumn dataField="ts_updated">Finished</TableHeaderColumn>     
                <TableHeaderColumn dataField="comms_matrix_id" width={`60px`}>#CM</TableHeaderColumn>
                <TableHeaderColumn dataField="visible_lines" width={`100px`}>Visible Lines</TableHeaderColumn>
                <TableHeaderColumn 
                    dataField="security_flows" 
                    width={`100px`} 
                    thStyle={{
                        whiteSpace: 'pre-wrap',
                        whiteSpace: '-moz-pre-wrap',
                        whiteSpace: '-pre-wrap',
                        whiteSpace: '-o-pre-wrap',
                        wordWrap: 'break-word'
                        }} 
                >
                    Security Flows
                </TableHeaderColumn>

            </BootstrapTable>
        );
    }

    render() {
        if(!this.runOnce && this.props.isReady){             
            this.runOnce = true;
            this.fetchWorkerJobs(this.options.page, this.options.sizePerPage, this.where, this.sort);
        }

        let table = <div>Loading...<i className="fa fa-spinner fa-spin"></i></div>;
        if ( Object.keys(this.props.reportsWorkerJobs).length > 0) {
            table = this.renderTable(this.state.data);
            this.moveElement();
        }

        return (
            <div className="container-fluid">
                <div className="row-fluid top-buffer">{table}</div>
            </div>
        );
    }
}

function mapStateToProps(state) {

    return {
        reportsWorkerJobs: state.reportsWorkerJobs,
        reportsWorkerJobsCount: state.reportsWorkerJobsCount
    };
}

function mapDispatchToProps(dispatch) {
    return bindActionCreators(
        { fetchWorkerJobs, fetchWorkerJobsCount },
        dispatch
    );
}

export default connect(mapStateToProps, mapDispatchToProps)(WorkerJobs);

我想取消之前的分页请求等。我需要取消

this.props.fetchWorkerJobsCount.cancel(); //not working
        this.props.fetchWorkerJobs.cancel(); //not working

我尝试从操作文件中导出变量并导入到组件中但不起作用

actions.js

export const FETCH_WORKERJOBS_COUNT_CANCEL = wjc_cancel;

组件

...
import { fetchWorkerJobs, fetchWorkerJobsCount, FETCH_WORKERJOBS_COUNT_CANCEL, FETCH_WORKERJOBS_CANCEL } from '../../actions';
...
onPageChange(page, sizePerPage) {
        const currentIndex = (page - 1) * sizePerPage;
        this.options.page = page;
        FETCH_WORKERJOBS_COUNT_CANCEL();
        FETCH_WORKERJOBS_CANCEL();
        this.fetchWorkerJobs(page, sizePerPage, this.where, this.sort);
      }

我得到的错误是Uncaught TypeError: (0 , _actions.FETCH_WORKERJOBS_COUNT_CANCEL) is not a function

更新

我试图将它作为变量传递给动作函数，但有些请求似乎已经通过了。我正在做的是快速按下分页上的下一个按钮。大部分被取消，但有些则没有。

export function fetchWorkerJobs(page, size, where, sort, cancelled) {
    if(cancelled){
        wj_cancel();

    }
    const request = axios.get(`/api/user/report/comms/matrix/upload/format/json?quiet=1&page=`+page+`&size=`+size+`&where=`+JSON.stringify(where)+`&sort=`+sort,{
        cancelToken: new CancelToken(function executor(c) {
            // An executor function receives a cancel function as a parameter
            wj_cancel = c;
        })
    }); 
    return {
        type: FETCH_WORKERJOBS,
        payload: request
    };
}

Answer 1

您需要访问source变量才能取消它。

或者，您可以在创建新请求时取消之前的请求（这似乎是您的用例）。

类似于以下内容（使用执行程序函数语法：https://github.com/axios/axios#cancellation，因此您为每个请求获取新令牌）

import axios from 'axios';
import $ from 'jquery';
var CancelToken = axios.CancelToken;
let wj_cancel, wjc_cancel;

export const FETCH_WORKERJOBS = 'fetch_workerjobs';

export function fetchWorkerJobs(page, size, where, sort) {
  wj_cancel && wj_cancel();
  const request = axios.get(`/api/user/report/comms/matrix/upload/format/json?quiet=1&page=` + page + `&size=` + size + `&where=` + JSON.stringify(where) + `&sort=` + sort, {
    cancelToken: new CancelToken(function executor(c) {
        // An executor function receives a cancel function as a parameter
        wj_cancel = c;
      }
  });
  return {
    type: FETCH_WORKERJOBS,
    payload: request
  };
}

export const FETCH_WORKERJOBS_COUNT = 'fetch_workerjobs_count';

export function fetchWorkerJobsCount(where) {
  wjc_cancel && wjc_cancel();
  const request = axios.get(`/api/user/report/comms/matrix/upload/count/format/json?quiet=1&where=` + JSON.stringify(where), {
    cancelToken: new CancelToken(function executor(c) {
        // An executor function receives a cancel function as a parameter
        wjc_cancel = c;
      }
  });
  return {
    type: FETCH_WORKERJOBS_COUNT,
    payload: request
  };
}

Answer 2

以下是可以使用的代码：

// get info in component
useEffect(() => {
    const cancelToken = customAxios.CancelToken.source();
    dispatch(fetchStream(match.params.id, cancelToken.token));

    return () => {
        cancelToken.cancel(`Cancel fetchStream ${match.params.id}`)
    }
}, []);

// where fetchStream in store/actions/streams.js
export const fetchStream = (id, cancelToken) => async dispatch => {
    try {
        const {data: stream} = await axios.get(`/streams/${id}`, {
            cancelToken
        });

        dispatch({
            type: FETCH_STREAM,
            payload: stream
        })
    } catch (e) {
        console.log("fetchStream get error ", e);
    }
};

如何用redux取消先前的axios反应

2 个答案: