1.什么是rss?
RSS 的全称是「简易内容聚合」(Really Simple Syndication),是一个能让你在一个地方订阅各种感兴趣网站的工具。
一个网站支持 RSS,就意味着每当它新发布一篇新文章,就会往一个位于特定网址的文件中,以特定的语法(具体而言是 XML 标记语言或 JSON)增加一条记录,列明这篇文章的标题、作者、发表时间和内容(可以是全文,也可以是摘要)等信息。这样,用户只要搜集所有他感兴趣的网站提供的这种文件的网址,并不时检查这些文件内容的更新,就能知道这些网站是否、何时发布了什么内容。RSS 阅读器的核心功能,就是存储用户订阅的 RSS 地址,以固定的频率自动检查更新,并将其内容转换为易读的格式呈现给用户。
为什么用 RSS
RSS 的对立面是算法推荐,像微信公众号、知乎、微博、今日头条等平台。 且不说算法推送平台广告多,迁移麻烦的问题。算法推荐的特点是,你不需要刻意选择,算法会根据你的喜好,给你推送内容。这样一来,你几乎没有选择的余地,在不断被「喂饱」中逐渐失去判断的能力。更可怕的地方在于,它替你定义了你的画像,然后把你潜移默化中变成了它所认为的你。「大数据杀熟」的东窗事发绝非偶然,用算法窥视用户隐私是当今互联网公司的通配。
做信息的主人,而不是奴隶。 RSS 是一种公开的协议,可自由更换平台与客户端。重要的一点是,获取信息的权力完全自治。RSS 相比算法推荐,拥有了可控性和安全感,隐私完全掌握在自己手里。
什么是atom?
Atom是一对彼此相关的标准。Atom供稿格式(Atom Syndication Format)是用于网站消息来源,基于XML的文档格式;而Atom出版协定(Atom Publishing Protocol,简称AtomPub或APP)是用于新增及修改网络资源,基于HTTP的协议。
它借鉴了各种版本RSS的使用经验,被许多的聚合工具广泛使用在发布和使用上。Atom供稿格式设计作为RSS的替代品;而Atom出版协定用来取 代现有的多种发布方式(如Blogger API和LiveJournal XML-RPC Client/Server Protocol)。而值得一提的是Google提供的多种服务正在使用Atom。Google Data API(GData)亦基于Atom。
Atom是IETF的"建议标准",Atom供稿格式列为RFC 4287,而Atom出版协定列为RFC 5023。
2.代码工程
实验目标:实现rss和atom订阅源
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>springboot-demo</artifactId>
<groupId>com.et</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>rss</artifactId>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-autoconfigure</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!--ROAM依赖 RSS 订阅-->
<dependency>
<groupId>com.rometools</groupId>
<artifactId>rome</artifactId>
<version>1.15.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.rometools/rome-utils -->
<dependency>
<groupId>com.rometools</groupId>
<artifactId>rome-utils</artifactId>
<version>1.15.0</version>
</dependency>
<dependency>
<groupId>org.jdom</groupId>
<artifactId>jdom2</artifactId>
<version>2.0.6</version>
</dependency>
</dependencies>
</project>
controller
采用rome库实现rss和atom订阅
package com.et.rss.controller;
import com.rometools.rome.feed.atom.*;
import com.rometools.rome.feed.rss.Channel;
import com.rometools.rome.feed.rss.Description;
import com.rometools.rome.feed.rss.Image;
import com.rometools.rome.feed.rss.Item;
import com.rometools.rome.feed.synd.SyndPerson;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.Collections;
import java.util.Date;
@RestController
@RequestMapping("/feed")
public class FeedController {
@GetMapping(path = "/rss")
public Channel rss() {
Channel channel = new Channel();
channel.setFeedType("rss_2.0");
channel.setTitle("HBLOG Feed");
channel.setDescription("Recent posts");
channel.setLink("http://www.liuhaihua.cn");
channel.setUri("http://www.liuhaihua.cn");
channel.setGenerator("Harries");
Image image = new Image();
image.setUrl("http://www.liuhaihua.cn/img/hblog.png");
image.setTitle("HBLOG Feed");
image.setHeight(32);
image.setWidth(32);
channel.setImage(image);
Date postDate = new Date();
channel.setPubDate(postDate);
Item item = new Item();
item.setAuthor("Harries");
item.setLink("http://www.liuhaihua.cn/archives/710608.html");
item.setTitle("Spring Boot integrated banner quick start demo");
item.setUri("http://www.liuhaihua.cn/archives/710608.html");
item.setComments("http://www.liuhaihua.cn/archives/710608.html#commnet");
com.rometools.rome.feed.rss.Category category = new com.rometools.rome.feed.rss.Category();
category.setValue("CORS");
item.setCategories(Collections.singletonList(category));
Description descr = new Description();
descr.setValue("pring Boot Banner is a feature for displaying custom ASCII art and information at application startup. This ASCII art usually includes the project name, version number, author information");
item.setDescription(descr);
item.setPubDate(postDate);
channel.setItems(Collections.singletonList(item));
//Like more Entries here about different new topics
return channel;
}
@GetMapping(path = "/atom")
public Feed atom() {
Feed feed = new Feed();
feed.setFeedType("atom_1.0");
feed.setTitle("HBLOG");
feed.setId("http://www.liuhaihua.cn");
Content subtitle = new Content();
subtitle.setType("text/plain");
subtitle.setValue("recents post");
feed.setSubtitle(subtitle);
Date postDate = new Date();
feed.setUpdated(postDate);
Entry entry = new Entry();
Link link = new Link();
link.setHref("http://www.liuhaihua.cn/archives/710608.html");
entry.setAlternateLinks(Collections.singletonList(link));
SyndPerson author = new Person();
author.setName("HBLOG");
entry.setAuthors(Collections.singletonList(author));
entry.setCreated(postDate);
entry.setPublished(postDate);
entry.setUpdated(postDate);
entry.setId("710608");
entry.setTitle("Spring Boot integrated banner quick start demo");
Category category = new Category();
category.setTerm("CORS");
entry.setCategories(Collections.singletonList(category));
Content summary = new Content();
summary.setType("text/plain");
summary.setValue("Spring Boot Banner is a feature for displaying custom ASCII art and information at application startup. This ASCII art usually includes the project name, version number, author information");
entry.setSummary(summary);
feed.setEntries(Collections.singletonList(entry));
//add different topic
return feed;
}
}
DemoApplication.java
package com.et.rss;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
application.yaml
server:
port: 8088
以上只是一些关键代码,所有代码请参见下面代码仓库
代码仓库
3.测试
启动Spring Boot应用
rss
http://127.0.0.1:8088/feed/rss
<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0">
<channel>
<title>HBLOG Feed</title>
<link>http://www.liuhaihua.cn</link>
<description>Recent posts</description>
<pubDate>Fri, 24 May 2024 14:26:21 GMT</pubDate>
<generator>Harries</generator>
<image>
<title>HBLOG Feed</title>
<url>http://www.liuhaihua.cn/img/hblog.png</url>
<width>32</width>
<height>32</height>
</image>
<item>
<title>Spring Boot integrated banner quick start demo</title>
<link>http://www.liuhaihua.cn/archives/710608.html</link>
<description>pring Boot Banner is a feature for displaying custom ASCII art and information at application startup. This ASCII art usually includes the project name, version number, author information</description>
<category>CORS</category>
<pubDate>Fri, 24 May 2024 14:26:21 GMT</pubDate>
<author>Harries</author>
<comments>http://www.liuhaihua.cn/archives/710608.html#commnet</comments>
</item>
</channel>
</rss>
atom
http://127.0.0.1:8088/feed/atom
<?xml version="1.0" encoding="UTF-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
<title>HBLOG</title>
<subtitle type="text">recents post</subtitle>
<id>http://www.liuhaihua.cn</id>
<updated>2024-05-24T14:25:38Z</updated>
<entry>
<title>Spring Boot integrated banner quick start demo</title>
<link rel="alternate" href="http://www.liuhaihua.cn/archives/710608.html" />
<category term="CORS" />
<author>
<name>HBLOG</name>
</author>
<id>710608</id>
<updated>2024-05-24T14:25:38Z</updated>
<published>2024-05-24T14:25:38Z</published>
<summary type="text">Spring Boot Banner is a feature for displaying custom ASCII art and information at application startup. This ASCII art usually includes the project name, version number, author information</summary>
</entry>
</feed>