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https://github.com/hu17889/go_spider

[爬虫框架 (golang)] An awesome Go concurrent Crawler(spider) framework. The crawler is flexible and modular. It can be expanded to an Individualized crawler easily or you can use the default crawl components only.
https://github.com/hu17889/go_spider

crawler go pipeline schedule spider

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[爬虫框架 (golang)] An awesome Go concurrent Crawler(spider) framework. The crawler is flexible and modular. It can be expanded to an Individualized crawler easily or you can use the default crawl components only.

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go_spider

=========



[![Build Status](https://travis-ci.org/hu17889/go_spider.svg)](https://travis-ci.org/hu17889/go_spider)



A crawler of vertical communities achieved by GOLANG. 



![image](https://raw.githubusercontent.com/hu17889/doc/master/go_spider/img/logo.png)



Latest stable Release: [Version 1.2 (Sep 23, 2014)](https://github.com/hu17889/go_spider/releases).



* [![go_spider讨论群](http://pub.idqqimg.com/wpa/images/group.png)](http://shang.qq.com/wpa/qunwpa?idkey=29f4d06e7fa2b401bc231274d08ada879db777bbf955a44c0e598aaf3d574963) QQ群号：337344607



## Features



* Concurrent 

* Fit for vertical communities

* Flexible, Modular

* Native Go implementation

* Can be expanded to an individualized crawler easily



## Requirements



* Go 1.2 or higher



## Documentation



[中文文档](https://github.com/hu17889/go_spider/wiki/%E4%B8%AD%E6%96%87%E6%96%87%E6%A1%A3) && [常见问题](https://github.com/hu17889/go_spider/wiki/%E5%B8%B8%E8%A7%81%E9%97%AE%E9%A2%98%E4%B8%8E%E5%8A%9F%E8%83%BD%E8%AF%B4%E6%98%8E).



## Installation



```

go get github.com/hu17889/go_spider

go get github.com/PuerkitoBio/goquery

go get github.com/bitly/go-simplejson

go get golang.org/x/net/html/charset

```



This project is based on [simplejson](https://github.com/bitly/go-simplejson/blob/master/simplejson.go), [goquery](https://github.com/PuerkitoBio/goquery).



You can download packages from [http://gopm.io/](http://gopm.io/) in China.



## Use example



Here is an example for crawling github content. You can have a try of the crawl process.

* `go install github.com/hu17889/go_spider/example/github_repo_page_processor`

* `./bin/github_repo_page_processor`



More examples here: [examples](https://github.com/hu17889/go_spider/tree/master/example).



## Make your spider



``` Go

    // Spider input:

    //  PageProcesser ;

    //  Task name used in Pipeline for record;

    spider.NewSpider(NewMyPageProcesser(), "TaskName").

        AddUrl("https://github.com/hu17889?tab=repositories", "html"). // Start url, html is the responce type ("html" or "json")

        AddPipeline(pipeline.NewPipelineConsole()).                    // Print result on screen

        SetThreadnum(3).                                               // Crawl request by three Coroutines

        Run()

```



- Use default modules 



 - Downloader：HttpDownloader

 - Scheduler：QueueScheduler

 - Pipeline：PipelineConsole，PipelineFile



- Use your modules



Just copy the default modules and modify it!



If you make a Downloader module, you can use it by `Spider.SetDownloader(your_downloader)`.



If you make a Pipeline module, you can use it by `Spider.AddPipeline(your_pipeline)`.



If you make a Scheduler module, you can use it by `Spider.SetScheduler(your_scheduler)`.



## Extensions



Extensions folder include modulers or other tools someone sharing. You can push your code without bugs.



## Modulers



### Spider



**Summary:** Crawler initialization, concurrent management, default moduler, moduler management, config setting.



**Functions:** 



- Clawler startup functions: Get, GetAll, Run

- Add request: AddUrl, AddUrls, AddRequest, AddRequests

- Set main moduler: AddPipeline(could have several pipeline modulers), SetScheduler, SetDownloader

- Set config: SetExitWhenComplete, SetThreadnum(concurrent number), SetSleepTime(sleep time after one crawl)

- Monitor: OpenFileLog, OpenFileLogDefault(open file log function, logged by **mlog** package), CloseFileLog, OpenStrace(open tracing info printed on screen by stderr), CloseStrace



### Downloader



**Summary:** Spider gets a Request in Scheduler that has url to be crawled. Then Downloader downloads the result(html, json, jsonp, text) of the Request. The result is saved in Page for parsing in PageProcesser.

Html parsing is based on **goquery** package. Json parsing is based on **simplejson** package. Jsonp will be conversed to json. Text form represents plain text content without parser. 



**Functions:**



- Download: download content of the crawl objective. Result contains data body, header, cookies and request info.



### PageProcesser



**Summary:** The PageProcesser moduler only parse results. The moduler gets results(key-value pairs) and urls to be crawled next step. 

These key-value pairs will be saved in PageItems and urls will be pushed in Scheduler.



**Functions:**



- Process: parse the objective crawled.



### Page



**Summary:** save information of request.



**Functions:** 



- Get result: GetJson, GetHtmlParser, GetBodyStr(plain text)

- Get information of objective: GetRequest, GetCookies, GetHeader

- Get Status of crawl process: IsSucc(Download success or not), Errormsg(Get error info in Downloader)

- Set config:SetSkip, GetSkip(if skip is true, do not output result in Pipeline), AddTargetRequest, AddTargetRequests(Save urls to be crawled next stage), AddTargetRequestWithParams, AddTargetRequestsWithParams, AddField(Save key-value pairs after parsing)



### Scheduler



**Summary:** The Scheduler moduler is a Request queue. Urls parsed in PageProcesser will be pushed in the queue.



**Functions:**



- Push

- Poll

- Count



### Pipeline



**Summary:** The Pipeline moduler will output the result and save wherever you want. Default moduler is PipelineConsole(Output to stdout) and PipelineFile(Output to file)



**Functions:**



- Process



### Request



**Summary:** The Request moduler has config for http request like url, header and cookies.



**Functions:**



- Process



## License

go_spider is licensed under the [Mozilla Public License Version 2.0](https://github.com/hu17889/go_spider/blob/master/LICENSE)



Mozilla summarizes the license scope as follows:

> MPL: The copyleft applies to any files containing MPLed code.



That means:

  * You can **use** the **unchanged** source code both in private as also commercial

  * You **needn't publish** the source code of your library as long the files licensed under the MPL 2.0 are **unchanged**

  * You **must publish** the source code of any **changed files** licensed under the MPL 2.0 under a) the MPL 2.0 itself or b) a compatible license (e.g. GPL 3.0 or Apache License 2.0)



Please read the [MPL 2.0 FAQ](http://www.mozilla.org/MPL/2.0/FAQ.html) if you have further questions regarding the license.



You can read the full terms here: [LICENSE](https://raw.github.com/go-sql-driver/mysql/master/LICENSE).