RSS Parser is a Kotlin Multiplatform library for parsing RSS and Atom feeds. It supports Android, iOS, and the JVM.
With RSS Parser, you can fetch plenty of useful information from any RSS channel, be it a blog, magazine, or even a podcast feed.
- Installation
- Important Notices
- Available data
- Usage
- Migration from version 5
- Sample project
- Changelog
- License
- Apps using RSS Parser
RSS Parser is currently published to Maven Central, so add it to your project's repositories.
repositories {
mavenCentral()
// ...
}Then, add the dependency to your common source set's dependencies.
commonMain {
dependencies {
// ...
implementation("com.prof18.rssparser:rssparser:<latest-version>")
}
}If you are in an Android-only project, simply add the dependency:
dependencies {
// ...
implementation("com.prof18.rssparser:rssparser:<latest-version>")
}Since February 2022, the library artifacts have been moved to MavenCentral. The group ID changed from com.prof.rssparser to com.prof18.rssparser.
Be sure to add the gradle dependency to your root build.gradle file.
allprojects {
repositories {
mavenCentral()
}
}
From version 6.0, RSSParser has become Multiplatform. This update brought some breaking changes:
- Some class names and packages have been changed. Check out the migration guide for further info.
- Caching of feeds is not supported anymore. After some consideration, I decided that the aim of this library is not meant to provide a caching solution for RSS feeds, but just to do the parsing. The user of the library should implement any caching/storing solutions their project requires.
- Support for Java with the
OnTaskCompletedandonErrorcallbacks has been dropped. You can still use the library in a Java project, but you will need to write some Kotlin code to handle Coroutines. More details in the section below.
Here you can find the README for version 5 of RSSParser.
The RssChannel result object provides the following data:
- Title
- Description
- Link
- Items
- Image (Title, Url and Link)
- Last build data
- Update period
- Itunes Data:
- Author
- Categories
- Duration
- Explicit
- Image
- Keywords
- News Feed URL
- Owner
- Subtitle
- Summary
- Type
Items support the following attributes:
- Title
- Author
- Description
- Content
- Image
- Link
- Publication Date
- Categories
- Audio
- Source (name and URL)
- GUID
- Video
- Comments URL
- Itunes Data:
- Author
- Duration
- Episode
- Episode Type
- Explicit
- Image
- Keywords
- Subtitle
- Summary
- Season
RssParser uses Coroutines for all the asynchronous work.
An RssParser instance is the entry point of the library.
It's possible to create an instance of RssParser directly in the common code, without having to pass any platform-specific dependencies.
val rssParser: RssParser = RssParser()An RssParser instance can also be built with a platform-specific RssParserBuilder. Some custom and optional fields can be provided to the builder.
On Android and the JVM, a custom OkHttpClient instance and a custom Charset can be provided. If an OkHttpClient instance is not provided, the library will create one. If no Charset is provided, it will automatically be inferred from the feed XML.
val builder = RssParserBuilder(
callFactory = OkHttpClient(),
charset = Charsets.UTF_8,
)
val rssParser = builder.build() On iOS, a custom NSURLSession instance can be provided. If an NSURLSession instance is not provided, the library will use the shared NSURLSession.
val builder = RssParserBuilder(
nsUrlSession = NSURLSession(),
)
val rssParser = builder.build() To parse an RSS feed from a URL, the suspending getRssChannel function can be used.
val rssChannel: RssChannel = rssParser.getRssChannel("https://www.rssfeed.com")To parse an RSS feed from an XML string, the suspending parse function can be used
val xmlString: String = "xml-string"
val rssChannel: RssChannel = rssParser.parse(xmlString)The support for Java with the OnTaskCompleted and onError callbacks has been dropped.
However, you can still use the library in a Java project, but you will need to write some Kotlin code to handle Coroutines.
You can transform a Coroutine into a CompletableFuture using the future extension function from
the kotlinx-coroutines-core library.
@JvmName("parseFeed")
fun parseFeed(parser: RssParser, url: String): CompletableFuture<RssChannel> = GlobalScope.future {
parser.getRssChannel(url)
}then, in your Java code, you can use the CompletableFuture API to handle the result.
RssParser parser = new RssParserBuilder().build();
try {
RssChannel channel = parseFeed(parser, urlString).get();
setChannel(channel);
} catch (Exception e) {
e.printStackTrace();
snackbar.postValue("An error has occurred. Please try again");
}N.B. To use CompletableFuture, you need to have a minimum API level of 24.
If you prefer Guava's ListenableFuture, you can use the listenableFuture extension function
from the kotlinx-coroutines-guava library.
More info in the official documentation here.
The repository contains three samples projects: a multiplatform, an Android and an Android with Java project to showcase the usage in a multiplatform app and an Android one.
Version 6 of the library introduced the following breaking changes:
- The main package name has been changed from
com.prof.rssparsertocom.prof18.rssparser; com.prof.rssparser.Parserhas been moved and renamed tocom.prof18.rssparser.RssParser;com.prof.rssparser.Parser.Builderhas been moved and renamed tocom.prof18.rssparser.RssParserBuilder;com.prof.rssparser.Channelhas been moved and renamed tocom.prof18.rssparser.model.RssChannel;com.prof.rssparser.Articlehas been moved and renamed tocom.prof18.rssparser.model.RssItem;com.prof.rssparser.HTTPExceptionhas been moved and renamed tocom.prof18.rssparser.exception.HttpException;com.prof.rssparser.Imagehas been moved and renamed tocom.prof18.rssparser.RssImage;com.prof.rssparser.ItunesOwnerhas been moved tocom.prof18.rssparser.model.ItunesOwner;com.prof.rssparser.ItunesArticleDatahas been moved and renamed tocom.prof18.rssparser.model.ItunesItemData;com.prof.rssparser.ItunesChannelDatahas been moved tocom.prof18.rssparser.model.ItunesChannelData;getChannel()has been renamed togetRssChannel();cancel()is not available anymore, the cancellation can be handled by the caller.
From version 1.4.4 and above, the changelog is available in the release section.
- 14 December 2017 - Little fixes on Error Management - Version 1.3.1
- 13 December 2017 - Improved Error Management - Version 1.3
- 10 December 2017 - Added support for the categories - Version 1.2
- 12 August 2017 - Fixed the Library Manifest and updated the dependencies - Version 1.1
- 18 June 2016 - First release - Version 1.0
Copyright 2016-2023 Marco Gomiero
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
If you are using RSS Parser in your app and would like to be listed here, please open a pull request!
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