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@ -1,4 +1,4 @@
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![logo](https://raw.github.com/code4craft/webmagic/master/asserts/logo.jpg)
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![logo](https://raw.github.com/code4craft/webmagic/master/assets/logo.jpg)
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[Readme in Chinese](https://github.com/code4craft/webmagic/tree/master/zh_docs)
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@ -21,48 +21,63 @@
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Add dependencies to your pom.xml:
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<dependency>
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<groupId>us.codecraft</groupId>
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<artifactId>webmagic-core</artifactId>
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<version>0.4.3</version>
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</dependency>
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<dependency>
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<groupId>us.codecraft</groupId>
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<artifactId>webmagic-extension</artifactId>
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<version>0.4.3</version>
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</dependency>
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```xml
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<dependency>
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<groupId>us.codecraft</groupId>
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<artifactId>webmagic-core</artifactId>
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<version>0.5.0</version>
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</dependency>
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<dependency>
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<groupId>us.codecraft</groupId>
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<artifactId>webmagic-extension</artifactId>
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<version>0.5.0</version>
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</dependency>
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```
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WebMagic use slf4j with slf4j-log4j12 implementation. If you customized your slf4j implementation, please exclude slf4j-log4j12.
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```xml
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<exclusions>
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<exclusion>
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<groupId>org.slf4j</groupId>
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<artifactId>slf4j-log4j12</artifactId>
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</exclusion>
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</exclusions>
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```
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## Get Started:
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### First crawler:
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Write a class implements PageProcessor:
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Write a class implements PageProcessor. For example, I wrote a crawler of github repository infomation.
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```java
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public class OschinaBlogPageProcesser implements PageProcessor {
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private Site site = Site.me().setDomain("my.oschina.net");
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@Override
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public void process(Page page) {
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List<String> links = page.getHtml().links().regex("http://my\\.oschina\\.net/flashsword/blog/\\d+").all();
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page.addTargetRequests(links);
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page.putField("title", page.getHtml().xpath("//div[@class='BlogEntity']/div[@class='BlogTitle']/h1").toString());
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page.putField("content", page.getHtml().$("div.content").toString());
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page.putField("tags",page.getHtml().xpath("//div[@class='BlogTags']/a/text()").all());
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public class GithubRepoPageProcessor implements PageProcessor {
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private Site site = Site.me().setRetryTimes(3).setSleepTime(1000);
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@Override
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public void process(Page page) {
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page.addTargetRequests(page.getHtml().links().regex("(https://github\\.com/\\w+/\\w+)").all());
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page.putField("author", page.getUrl().regex("https://github\\.com/(\\w+)/.*").toString());
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page.putField("name", page.getHtml().xpath("//h1[@class='entry-title public']/strong/a/text()").toString());
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if (page.getResultItems().get("name")==null){
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//skip this page
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page.setSkip(true);
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}
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page.putField("readme", page.getHtml().xpath("//div[@id='readme']/tidyText()"));
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}
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@Override
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public Site getSite() {
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return site;
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}
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@Override
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public Site getSite() {
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return site;
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}
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public static void main(String[] args) {
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Spider.create(new OschinaBlogPageProcesser()).addUrl("http://my.oschina.net/flashsword/blog")
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.addPipeline(new ConsolePipeline()).run();
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}
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public static void main(String[] args) {
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Spider.create(new GithubRepoPageProcessor()).addUrl("https://github.com/code4craft").thread(5).run();
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}
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}
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```
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* `page.addTargetRequests(links)`
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@ -72,28 +87,31 @@ Write a class implements PageProcessor:
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You can also use annotation way:
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```java
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@TargetUrl("http://my.oschina.net/flashsword/blog/\\d+")
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public class OschinaBlog {
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@TargetUrl("https://github.com/\\w+/\\w+")
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@HelpUrl("https://github.com/\\w+")
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public class GithubRepo {
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@ExtractBy("//title")
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private String title;
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@ExtractBy(value = "//h1[@class='entry-title public']/strong/a/text()", notNull = true)
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private String name;
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@ExtractBy(value = "div.BlogContent",type = ExtractBy.Type.Css)
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private String content;
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@ExtractByUrl("https://github\\.com/(\\w+)/.*")
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private String author;
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@ExtractBy(value = "//div[@class='BlogTags']/a/text()", multi = true)
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private List<String> tags;
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@ExtractBy("//div[@id='readme']/tidyText()")
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private String readme;
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public static void main(String[] args) {
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OOSpider.create(
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Site.me(),
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new ConsolePageModelPipeline(), OschinaBlog.class).addUrl("http://my.oschina.net/flashsword/blog").run();
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}
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}
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public static void main(String[] args) {
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OOSpider.create(Site.me().setSleepTime(1000)
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, new ConsolePageModelPipeline(), GithubRepo.class)
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.addUrl("https://github.com/code4craft").thread(5).run();
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}
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}
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```
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### Docs and samples:
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Documents: [http://webmagic.io/docs/](http://webmagic.io/docs/)
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The architecture of webmagic (refered to [Scrapy](http://scrapy.org/))
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![image](http://code4craft.github.io/images/posts/webmagic.png)
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@ -110,6 +128,7 @@ Lisenced under [Apache 2.0 lisence](http://opensource.org/licenses/Apache-2.0)
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Thanks these people for commiting source code, reporting bugs or suggesting for new feature:
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* [ccliangbo](https://github.com/ccliangbo)
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* [yuany](https://github.com/yuany)
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* [yxssfxwzy](https://github.com/yxssfxwzy)
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* [linkerlin](https://github.com/linkerlin)
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@ -124,6 +143,8 @@ Thanks these people for commiting source code, reporting bugs or suggesting for
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* [yyw258520](https://github.com/yyw258520)
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* [perfecking](https://github.com/perfecking)
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* [lidongyang](http://my.oschina.net/lidongyang)
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* [seveniu](https://github.com/seveniu)
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* [sebastian1118](https://github.com/sebastian1118)
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### Thanks:
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@ -146,6 +167,10 @@ To write webmagic, I refered to the projects below :
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[https://groups.google.com/forum/#!forum/webmagic-java](https://groups.google.com/forum/#!forum/webmagic-java)
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[http://list.qq.com/cgi-bin/qf_invite?id=023a01f505246785f77c5a5a9aff4e57ab20fcdde871e988](http://list.qq.com/cgi-bin/qf_invite?id=023a01f505246785f77c5a5a9aff4e57ab20fcdde871e988)
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QQ Group: 373225642
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[![Bitdeli Badge](https://d2weczhvl823v0.cloudfront.net/code4craft/webmagic/trend.png)](https://bitdeli.com/free "Bitdeli Badge")
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