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web spider build with puppeteer spread retract

  • TypeScript 96.0%
  • HTML 3.3%
  • CSS 0.5%
  • JavaScript 0.2%
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README.en.md 34.07 KB
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xiyuan0918 authored 2019-09-23 11:23 . 增加 SocksProxyAgent 支持

中文文档

Quick Start

Install NodeJs

http://nodejs.cn/download/

Install TypeScript

npm install -g typescript

Prepare the development environment

Recommended IDEA(Ultimate version) + NodeJs Plugin
Ultimate 版本截图
The NodeJs plugin's version should match with the IDEA's version
IDEA 版本
nodejs 插件版本

IDEA download
NodeJs Plugin download

Nodejs And Javascript Configuration in IDEA
nodejs-config.png
javascript-config.png

Download And Run ppspider_example

ppspider_example github address
https://github.com/xiyuan-fengyu/ppspider_example

Clone ppspider_example with IDEA

Warning: git is required and the executable file path of git should be set in IDEA
IDEA git 配置

IDEA clone from git
IDEA clone from git

Install npm dependencies

Click "Terminal" on the bottom side of IDEA to open a terminal and run the following command

npm install

Run tsc

Run 'tsc' in terminal
Or
ContextMenu on package.json -> Show npm Scripts -> Double click 'auto build'
tsc is a TypeScript compiler which can auto compile the ts file to js file after any ts file change

Startup ppspider App

Run lib/quickstart/App.js
Open http://localhost:9000 in the browser to check the ppspider's status

Deploy with docker

https://github.com/xiyuan-fengyu/ppspider_docker_deploy/blob/master/README.en.md

Examples

  1. Monitor website access speed, visualize real-time statistics, and view the details of all requests in the process of opening a web page ppspider-webMonitor
  2. Dynamically set task parallel via cron expressions DynamicParallelApp
  3. If you wants some queues to not be executed immediately after the application is started, look this QueueWaitToRunApp
  4. Web page screenshot, super long page is supported ScreenshotApp
  5. Get video's infos and comments from https://www.bilibili.com BilibiliApp
  6. Set proxy for a page Page Proxy
  7. QQ music info and comments QQ Music
  8. request + cheerio, crawling static web pages CheerioApp
  9. Twitter get topic comments and user info TwitterApp
  10. Depth-First-Search,DFS (By default, DefaultQueue is breadth-first search) DepthFirstSearchApp
  11. request + cheerio, crawling static web pages QuotesToScrapeApp
  12. Music 163 download Music163App
    Music 163 download result
  13. ProxyPool
  14. Bandcamp Music download
  15. Set max try num of job SetMaxTryApp
  16. Page.evaluate with async function PuppeteerEvalAsyncApp
  17. Set AddToQueue/FromQueue name with a regexp string to create a series of queues dynamically AddToRegexQueue
  18. Drag to complete the puzzle PuppeteerUtil.dragJigsaw

ppspider System Introduction

Decorator

Declare like

export function TheDecoratorName(args) { ... }

Usage

@TheDecoratorName(args)

Decorator is similar of look with java Annotation, but Decorator is stronger. Decorator can provide meta data by parameters and modify the target or descriptor to change behavior of class or method
In ppspider, many abilities are provided by Decorator

@Launcher

export function Launcher(theAppInfo: AppInfo) { ... }

Launcher of a ppspider app
Params type

export type AppConfig = { 
    // all cache files and the db file will be saved to the workplace folder. You can save the data files to this folder too.
    workplace: string;  
    
    // file path to save the running status,default is workplace + "/queueCache.json"
    queueCache?: string; 
    
    // database url, nedb or mongodb is supported. When the app will generate a little amount of data, use nedb, the url format: nedb://nedbDirPath; Otherwise, mongodb is recommended, the url format: mongodb://username:password@host:port/dbName. The default value is "nedb://" + appInfo.workplace + "/nedb"
    dbUrl?: string; 
    
    // import all task class   
    tasks: any[]; 
    
    // import all DataUi class
    dataUis?: any[];   
    
    // all workerFactory instances, only PuppeteerWorkerFactory, NoneWorkerFactory is provided at present
    workerFactorys: WorkerFactory<any>[]; 
    
    // the port for web ui,default 9000  
    webUiPort?: number | 9000;
    
    // logger setting
    logger?: LoggerSetting; 
}

@OnStart

export function OnStart(config: OnStartConfig)

A job executed once after app start, but you can execute it again by pressing the button in webUI. The button will be found after the queue name in webUI's Queue panel.

Params type

export type OnStartConfig = {
    // urls to crawl
    urls: string | string[];  
    
     // if set true, this queue will not run after startup
    running?: boolean;
    
    // config of max paralle num, can be a number or a object with cron key and number value    
    parallel?: ParallelConfig;
    
    // the execute interval between jobs, all paralle jobs share the same exeInterval  
    exeInterval?: number;
    
    // make a random delta to exeInterval
    exeIntervalJitter?: number;
    
    // Task timeout, in milliseconds, default: 300000, negative number means never timeout
    timeout?: number;
    
    // description of this sub task type
    description?: string;
}

@OnStart example

@OnTime

export function OnTime(config: OnTimeConfig) { ... }

A job executed at special times resolved by cron expression
Params type

export type OnTimeConfig = {
    urls: string | string[];
    cron: string; // cron expression
    running?: boolean;
    parallel?: ParallelConfig;
    exeInterval?: number;
    exeIntervalJitter?: number;
    timeout?: number;
    description?: string;
}

@OnTime example

@AddToQueue @FromQueue

Those two should be used together, @AddToQueue will add the function's result to job queue, @FromQueue will fetch jobs from queue to execute

@AddToQueue

export function AddToQueue(queueConfigs: AddToQueueConfig | AddToQueueConfig[]) { ... }

@AddToQueue accepts one or multi configs
Config type:

export type AddToQueueConfig = {
    // queue name
    name: string;
    
    // queue provided: DefaultQueue(FIFO), DefaultPriorityQueue
    queueType?: QueueClass;
    
    // filter provided: NoFilter(no check), BloonFilter(check by job's key)
    filterType?: FilterClass;
}

You can use @AddToQueue to add jobs to a same queue at multi places, the queue type is fixed at the first place, but you can use different filterType at each place.

The method Decorated by @AddToQueue shuold return a AddToQueueData like.

export type CanCastToJob = string | string[] | Job | Job[];

export type AddToQueueData = Promise<CanCastToJob | {
    [queueName: string]: CanCastToJob
}>

If @AddToQueue has multi configs, the return data must like

Promise<{
    [queueName: string]: CanCastToJob
}>

PuppeteerUtil.links is a convenient method to get all expected urls, and the return data is just AddToQueueData like.

@FromQueue

export function FromQueue(config: FromQueueConfig) { ... }

export type FromQueueConfig = {
    // queue name
    name: string;

    running?: boolean;

    parallel?: ParallelConfig;
    
    exeInterval?: number;
    
    exeIntervalJitter?: number;
    
    // Task timeout, in milliseconds, default: 300000, negative number means never timeout
    timeout?: number;
    
    description?: string;
}

@AddToQueue @FromQueue example

@JobOverride

export function JobOverride(queueName: string) { ... }

Modify job info before inserted into the queue.
You can set a JobOverride just once for a queue.

A usage scenario is: when some urls with special suffix or parameters navigate to the same page, you can modify the job key to some special and unique id taken from the url with a JobOverride. After that, jobs with duplicate keys will be filtered out.

Actually, sub task type OnStart/OnTime is also managed by queue whose name just likes OnStart_ClassName_MethodName or OnTime_ClassName_MethodName, so you can set a JobOverride to it.
JobOverride example

@Serializable @Transient

export function Serializable(config?: SerializableConfig) { ... }
export function Transient() { ... }

@Serializable is used to mark a class, then the class info will keep during serializing and deserializing. Otherwise, the class info will lose when serializing.

@Transient is used to mark a field which will be ignored when serializing and deserializing. Warn: static field will not be serialized.
These two are mainly used to save running status. You can use @Transient to ignore fields which are not related with running status, then the output file will be smaller in size.
example

@RequestMapping

export function RequestMapping(url: string, method: "" | "GET" | "POST" = "") {}

@RequestMapping is used to declare the HTTP rest interface, providing the ability to dynamically add tasks remotely. Returning the crawl results requires self-implementation (such as asynchronous url callbacks). RequestMapping example

@Bean @Autowired

仿造 java spring @Bean @Autowired 的实现,提供实例依赖注入的功能
example

@DataUi @DataUiRequest

You can define you own tab page in UI(http://localhost:webPort) by this which can extend support for data visualization and user interaction
You should import the DataUiClass in @Launcher appConfig.dataUis

There is a built-in DataUi DbHelperUi which can support db search

example 1 DataUi basic usage
nedbHelper.png
dataUiTest1.png
dataUiTest2.png

example 2 Add Dynamic Job On UI
动态任务.png

example 3 Web Page Screenshot
Long web page screenshot is also supported
网页截图.png

PuppeteerUtil

PuppeteerUtil.defaultViewPort

set page's view port to 1920 * 1080

PuppeteerUtil.addJquery

inject jquery to page, jquery will be invalid after page refresh or navigate, so you should call it after page load.

PuppeteerUtil.jsonp

parse json in jsonp string

PuppeteerUtil.setImgLoad

enable/disable image load

PuppeteerUtil.onResponse

listen response with special url, max listen num is supported

PuppeteerUtil.onceResponse

listen response with special url just once

PuppeteerUtil.downloadImg

download image with special css selector

PuppeteerUtil.links

get all expected urls

PuppeteerUtil.count

count doms with special css selector

PuppeteerUtil.specifyIdByJquery

Find dom nodes by jQuery(selector) and specify random id if not existed, finally return the id array.
A usage scenario is:
In puppeteer, all methods of Page to find doms by css selector finally call document.querySelector / document.querySelectorAll which not support some special css selectors, howerver jQuery supports. Such as: "#someId a:eq(0)", "#someId a:contains('next')".
So we can call specifyIdByJquery to specify id to the dom node and keep the special id returned, then call Page's method with the special id.

PuppeteerUtil.scrollToBottom

scroll to bottom

PuppeteerUtil.parseCookies

Parse cookie string to SetCookie Array,than set coookie through page.setCookie(...cookieArr)
How to get cookie string?
open interested url in chrome-> press F12 to open devtools -> Application panel -> Storage:Cookies: -> cookie detail in the left panel -> choose all by mouse,press Ctrl+c to copy all
You will get something similar to the following

PHPSESSID	ifmn12345678	sm.ms	/	N/A	35				
cid	sasdasdada	.sm.ms	/	2037-12-31T23:55:55.900Z	27			

PuppeteerUtil.useProxy

Set dynamic proxy for a single page

PuppeteerUtil example

PuppeteerUtil example
Single Page Proxy

NetworkTracing

Recode all requests during page opening NetworkTracing example

Database

Nedb is supported by NedbDao.
Mongodb is supported by MongodbDao.
You can set the "dbUrl" in @Launcher parameters, then use appInfo.db to visist db. All metheds defined in src/common/db/DbDao.
Nedb is a server-less database, no need to install the server end, the data will be persisted to the local file. Url format: nedb://nedbDirectoryPath. When the amount of data is large, the data query speed is slow, and it will take a lot of time to load data each time you restart the application, so use it only if the data is small.
Mongodb needs to install the mongo server. The url format: mongodb://username:password@host:port/dbName. It is recommended to save a large amount of data.

After the application is started, a job collection is automatically created to save the job info during execution.

database example

logger

Use logger.debug, logger.info, logger.warn or logger.error to print log.
Those functions are defined in src/common/util/logger.ts.
The output logs contain extra info: timestamp, log level, source file position.

logger.debugValid && logger.debug("test debug");
logger.info("test info");
logger.warn("test warn");
logger.error("test error");

Debug

simple typescript/js code can be debugged in IDEA

The inject js code can be debugged in Chromium. When building the PuppeteerWorkerFactory instance, set headless = false, devtools = true to open Chromium devtools panel.
Inject js debug example

import {Launcher, PuppeteerWorkerFactory} from "ppspider";
import {TestTask} from "./tasks/TestTask";

@Launcher({
    workplace: __dirname + "/workplace",
    tasks: [
        TestTask
    ],
    workerFactorys: [
        new PuppeteerWorkerFactory({
            headless: false,
            devtools: true
        })
    ]
})
class App {

}

Add debugger; where you want to debug

import {Job, OnStart, PuppeteerWorkerFactory} from "ppspider";
import {Page} from "puppeteer";

export class TestTask {

    @OnStart({
        urls: "http://www.baidu.com",
        workerFactory: PuppeteerWorkerFactory
    })
    async index(page: Page, job: Job) {
        await page.goto(job.url());
        const title = await page.evaluate(() => {
           debugger;
           const title = document.title;
           console.log(title);
           return title;
        });
        console.log(title);
    }

}

In addition, when developing DataUi, you can debug it in browser
DataUiDebug.png

Related Information

jQuery

http://www.runoob.com/jquery/jquery-syntax.html

puppeteer

https://github.com/GoogleChrome/puppeteer/blob/master/docs/api.md

nedb

https://github.com/louischatriot/nedb

mongodb

https://docs.mongodb.com/manual/reference/method/js-collection/

Angular

https://angular.io/

G2

https://antv.alipay.com/zh-cn/g2/3.x/demo/index.html
G2 integrated in web ui for data visualization in DataUi

bootstrap

https://v3.bootcss.com/css/
The web ui integrates bootstrap and jquery which make it easy to use the bootstrap and jquery to write the ui interface directly in DataUi.

WebUI

open http://localhost:9000 in browser

Queue panel: view and control app status
Queue Help

Job panel: search jobs and view details
ppspiderJobs.en.png

Question

  1. When running an app in idea under debug mode after a long time, the application may get stucked on a code line just like a breakpoint stop. It is due to low memory, just add a node paramter "--max-old-space-size=8192" to solve it. This situation has often appeared in previous versions, mainly due to nedb write/read process or serialization/deserialization process of QueueManager.
      In the new version (v2.1.2), it has been optimized.

  2. When using the v2.2.0+ version, the workerFactory property is removed from @OnStart, @OnTime, @FromQueue. If you want to use the puppeteer page to crawl the website,   You can import the Page class via

    import {Page} from "ppspider";

    and then declare a page: Page parameter in the parameter list of the callback function. If use   Import {Page} from "puppeteer" to import Page, the imported Page is just an interface, which cannot be determined at runtime by reflect-metadata,   and the page instance will not be injected successfully. This error is checked during startup.

Update Note

2019-09-04 v2.2.3-preview.1569208986875

  1. fix bug: null pointer error in src/common/db/MongodbDao.ts#remove
  2. add a new parameter to transfer the parent job info for JobOverride callback method
  3. ignore classes which are not marked with @Serializable during the serialization process
  4. fix bug: match with RegExp.toString
  5. Add SocksProxyAgent support in RequestUtil

2019-07-31 v2.2.2-preview

  1. @Bean @Autowired bug fixed, support type identification for @Autowired
  2. Add new method RequestUtil.linesToHeaders to parse header-lines; add headerLines property to the parameter named options of RequestUtil.simple, add an optional parameter handler to watch the response
  3. Add cookies automatically when using PuppeteerUtil.useProxy to proxy requests
  4. Add async function support for Page.evaluate, evaluateOnNewDocument, evaluateHandle, $eval, $$eval
  5. Page import fixed
  6. Add UserAgents util to get random user-agent
  7. Add regexp support for AddToQueue/FromQueue name(example)
  8. Set Page default viewport as 1920 * 1080, set navigator.webdriver=false
  9. Add a new function PuppeteerUtil.drag to drag bar
  10. Add a new PuppeteerUtil.triggerAndWaitRequest to trigger and watch a request
  11. Add a new PuppeteerUtil.triggerAndWaitResponse to trigger a request and watch the response
  12. Provides solutions for slider verification
    Drag from left to right PuppeteerUtil.dragBar
    Drag to the right place to complete the puzzle PuppeteerUtil.dragJigsaw

2019-06-22 v2.2.1

  1. Rewrite the way to inject the worker instance through the reflection mechanism provided by typescript and reflect-metadata during calling method decorated by @OnStart, @OnTime, @FromQueue.
    The workerFactory property of @OnStart, @OnTime, @FromQueue is removed. The freamwork check the parameter types of the decorated method to determine whether the job parameter needs to be passed, whether the worker instance needs to be passed (if true, which worker type is the correct one). The order and number of parameters are no longer fixed.

    But there are also restrictions, in the parameters, at most one with the Job type, and at most one with the worker type which has the corresponding WorkerFactory definition (only Page is currently provided). Be careful that the class Page is provided in the ppspider package, not the interface Page defined in @types/puppeteer.

    Because of this change, some code needs to be upgraded. You need to remove the workerFactory property in @OnStart, @OnTime, @FromQueue. If you want to use page: Page in the method decorated by @OnStart, @OnTime, @FromQueue, you need to import {Page} from "ppspider" instead of "puppeteer", other parameters except job: Job should be removed. The order and name of the parameters can be defined freely. If the job: Job is not used in the method, you can also remove this parameter.

  2. Fixed a bug: @AddToQueue does not work without @OnStart / @OnTime / @FromQueue.

  3. Add deployment scheme based on docker

2019-06-13 v2.1.11

  1. fix the once listener bug in PuppeteerWorkerFactory.overrideMultiRequestListenersLogic
  2. add Buffer type to the parameter content in FileUtil.write
  3. in process of QueueManager.loadFromCache, fix the lastExeTime of queue
  4. change the dependencies of ui: bootstrap(3.4.1), g2(@antv/g2, @antv/data-set)
  5. define window.__awaiter in ui, to support async and await in DataUi
  6. define window.loadScript in ui, make it easy to load third-party script in DataUi
  7. JobOverride supports async callback methods; change the timing that JobOverride calls callback method.

2019-06-06 v2.1.10

  1. Override Add/Remove/Query request listener of Page to ensure that a page has only one request listener(theOnlyRequestListener).
    The user-added request listener will be called via theOnlyRequestListener.
    Whether to call request.continue is no longer confusing.
  2. Override the process of AddToQueue to add the method result to queues, so that Filter supports asynchronous check.
  3. Rewrite the proxy process of PuppeteerUtil.useProxy by request.
  4. The description of fail / failed is added to the UI interface. The number of failed in the queue shows two numbers: the number of failed tries, and the number of tasks that still fail after the maximum number of tries.

2019-06-03 v2.1.9

  1. Fix bug: app stoped if exception occurred during request proxy in PuppeteerUtil.useProxy

2019-06-02 v2.1.8

  1. Add new method: PuppeteerUtil.useProxy, to support single page proxy
  2. update puppeteer version to 1.17.0

2019-05-28 v2.1.6

  1. Fix a wrong ref of URL model in MongodbDao
  2. Fix a bug to parse date in PuppeteerUtil.parseCookie

2019-05-24 v2.1.3

  1. On Job panel of ui interface, change "createTime" to text input, accurate to milliseconds
  2. Fix bug during deleting job.
  3. Rewrite the method to set parallel by cron expressions, then the parallel will be setted immediately after the application launch.

2019-05-21 v2.1.2

  1. Rewrite the serialization and deserialization process to solve the problem of large object serialization failure.
  2. Delete DefaultJob, change interface Job to class Job, and the methods are changed to corresponding fields. This change causes historical QueueCache data to be incompatible.
  3. Override the process of loading and saving Nedb to support reading and writing large amounts of data.
  4. Rewrite NedbDao, provide new mongodb support: MongodbDao. They two are compatible with reading and writing data. Users can directly use @Launcher dbUrl to configure the database, and operate the database through appInfo.db.

2019-05-09 v2.0.5

  1. Change cron lib: later -> cron
  2. Update the logic to calculate the next execution time of OnTime Job

2019-05-08 v2.0.4

  1. Upgrade puppeteer: v1.15.0
  2. Rewrite the serialization and deserialization process to solve the problem of large object serialization failure
    Due to this change, if you need to use the old queueCache.json which saved the running state, you can upgrade this file as following:
    Import UpgradeQueueCacheTask at "@Launcher tasks",
    Rename the old queueCache.json to queueCache_old.json and put it in the workplace directory,
    Start the app and the queueCache.txt will be generated in the workplace directory,
    Remove UpgradeQueueCacheTask at "@Launcher tasks".

2019-04-29 v2.0.3

  1. When the ui interface switches tab pages, the previous tab page will not be destroyed.
  2. fix bug: PuppeteerUtil.links can't find urls when passing Regex parameter.
  3. fix bug: Nedb uses string concatenation to build new data content during the process of compressing data. Memory overflow occurs when the amount of data is large.

2019-04-29 v2.0.2

  1. Output colorful logs using ansi-colors

2019-04-22 v2.0.1

  1. add RequestUtil, Encapsulate request as a promise style call
  2. Modify the declaration of NedbHelperUi.defaultSearchExp to avoid error reporting during ts compilation

2019-04-04 v2.0.0

  1. Multiple task threads of the same queue in the QueueManager no longer share a single wait interval
  2. The QueueManager can forcibly interrupt the execution of a running job (the UI Job panel provides an interactive button)
    By code
    appInfo.eventBus.emit(Events.QueueManager_InterruptJob, JOB_ID, "your interrupt reason");
  3. Status can be saved when ppspider is running
  4. Added @Bean @Autowired decorator to provide dependency injection programming
  5. Added @DataUi @DataUiRequest decorator to provide custom UI tab page, user can customize data visualization page, interactive tool

2019-01-28 v0.1.22

  1. Automatically clear jobs marked as filtered.
  2. Add job (status: Fail | Success) to queue by clicking button on the Job UI .

2018-12-24 v0.1.21

  1. Add timeout to task configuration, default 300000ms
  2. Add logs to job during task execution to analysis execution time and failure reasons

2018-12-10 v0.1.20

  1. Fix a bug: duplicate instances of the same user defined Task are created

2018-11-19 v0.1.19

  1. Fix a bug: the logger always print error as '{}'.
  2. You can select multiple items when the condition has a list of options on the UI interface.
  3. Update puppeteer version to 0.10.0.

2018-09-19 v0.1.18

  1. Change the reference address of the exported class in index.ts to the original path, so that the user can locate the source code location in the editor quickly.
  2. Print job detail when an error occurred.
  3. The number of job failures increases after all attempts fail.
  4. The parameter list of several methods declared in the logger to print log is changed to an indefinite parameter list. The format parameter is no longer accepted. The indefinite parameter list is used as the message list, and the messages are automatically divided by '\n'; The logger automatically converts obj to string using JSON.stringify(obj, null, 4).
  5. Add a new property named "exeIntervalJitter" to OnStart, OnTime, FromQueue, it makes a random jitter in a range to the execution interval(exeInterval). default: exeIntervalJitter = exeInterval * 0.25
  6. Add a new property named "running" to OnStart, OnTime, FromQueue to control the queue running status, default is true. Change the running status like following:
    mainMessager.emit(MainMessagerEvent.QueueManager_QueueToggle_queueName_running, queueNameRegex: string, running: boolean)
  7. The nedb related code in JobManager is rewritten with NedbDao
  8. Add a decorator @RequestMapping to declare the HTTP rest interface, providing the ability to dynamically add jobs remotely. Returning the crawl results requires self-implementation (such as asynchronous url callbacks).

2018-08-24 v0.1.17

  1. In job detail modal, add support to recursively load the parent job detail, add target="_blank" to all 'a' elements to open a new tab when clicked
  2. The push mode of spider system info is changed from periodic to event driven and delayed
  3. Update puppeteer version to 1.7.0
  4. Add NoneWorkerFactory whose init action is not required, it is used when puppeteer is not required
  5. Complement the SSS of logger datetime with 0
  6. The job with empty url is accepted now

2018-07-31 v0.1.16

  1. Fix bug: no effect after setting maxParallelConfig=0
  2. Update puppeteer version to 1.6.1-next.1533003082302 to solve the bug which causes loss of response in version 1.6.1 of puppeteer

2018-07-30 v0.1.15

  1. Change the implement of PuppeteerUtil.addJquery
    Change the inject way of jQuery because Page.addScriptTag is not supported by some website
  2. Fix bug: PuppeteerWorkerFactory.exPage compute a wrong position of js executing error
  3. Fix bug: The CronUtil.next may generate a next execute time which equals to the last job

2018-07-27 v0.1.14

  1. Add support to logger level check
    Add support to change logger config
    Logger config can be set in @launcher
  2. Change the parameter of DefaultJob.datas to optional
  3. Enhance the page created by PuppeteerWorkerFactory, methods such as $eval, $$eval, evaluate, evaluateOnNewDocument, evaluateHandle are improved, when the inject js executes with error, it will print the detail and position of error
  4. Change the implement of serialize
  5. Add comments to source code
  6. Update puppeteer version

2018-07-24 v0.1.13

  1. Import source-map-support, add logger to print log with source code position

2018-07-23 v0.1.12

  1. Add @Transient Decorator to ignore field when serialization

2018-07-19 v0.1.11

  1. Set the max wait time to 60 secondes when spider system shutdown,
    those jobs which are not complete will become fail once and add to queue to try again
  2. Fix bug: img url match is incorrect

2018-07-16 v0.1.8

  1. Implement a serialization util to solve the circular reference question

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