NOTICE: Currently in development.
This library provides functionality for working with appcasts. It retrieves versions alongside with the download URLs if available and other useful information.
The word "appcast" is usually referred to a remote web page providing information about software updates. This kind of pages are usually created for different software update frameworks like (Sparkle) or generated by different services that distribute applications (SourceForge, GitHub and etc.). There are plenty of different methods available, but originally "appcasting" was the practice of using an RSS enclosure to distribute updates and release notes.
Since today you can find plenty of different ways how vendors distribute their software updates, this library attempts to provide a universal way of analyzing and retrieving the useful information from appcasts of the supported providers.
- Load the appcast from remote URL
- Load the appcast from local file
- Detect which one of the supported providers is used
- Extract releases
- Sort releases by version
- Try to guess the release stability
- Filter releases using RegExp by title, media type or download URL
- Filter releases by stability
At the moment, only 3 providers are supported:
Appcasts, created for the Sparkle Framework. Originally, Sparkle was created to distribute software updates for macOS applications. However, for Windows, there is a WinSparkle framework which uses the same RSS enclosure technique to distribute updates and release notes.
Example URL: https://www.adium.im/sparkle/appcast-release.xml
package main
import (
"fmt"
"github.com/victorpopkov/go-appcast"
)
func main() {
a := appcast.New()
a.LoadFromURL("https://www.adium.im/sparkle/appcast-release.xml")
a.GenerateChecksum(appcast.SHA256)
a.ExtractReleases()
a.SortReleasesByVersions(appcast.DESC)
fmt.Println("Checksum:", a.GetChecksum())
fmt.Println("Provider:", a.GetProvider())
for i, release := range a.Releases {
fmt.Println(fmt.Sprintf("Release #%d:", i+1), release)
}
// Output:
// Checksum: 6ec7c5abcaa78457cc4bf3c2196584446cca1461c65505cbaf0382a2f62128db
// Provider: Sparkle RSS Feed
// Release #1: {1.5.10.4 1.5.10.4 Adium 1.5.10.4 [{https://adiumx.cachefly.net/Adium_1.5.10.4.dmg application/octet-stream 21140435}] 2017-05-14 12:04:01 +0000 UTC false}
// Release #2: {1.5.10 1.5.10 Adium 1.5.10 [{https://adiumx.cachefly.net/Adium_1.5.10.dmg application/octet-stream 24595712}] 2014-05-19 21:25:14 +0000 UTC false}
// Release #3: {1.4.5 1.4.5 Adium 1.4.5 [{https://adiumx.cachefly.net/Adium_1.4.5.dmg application/octet-stream 23065688}] 2012-03-20 20:30:00 +0000 UTC false}
// Release #4: {1.3.10 1.3.10 Adium 1.3.10 [{https://adiumx.cachefly.net/Adium_1.3.10.dmg application/octet-stream 22369877}] 2010-01-12 23:30:00 +0000 UTC false}
// Release #5: {1.0.6 1.0.6 Adium 1.0.6 [{https://adiumx.cachefly.net/Adium_1.0.6.dmg application/octet-stream 13795246}] 2007-08-13 22:12:45 +0000 UTC false}
}Each project hosted on SourceForge has its own releases RSS feed available that can be considered as an appcast.
Example URL: https://sourceforge.net/projects/filezilla/rss
package main
import (
"fmt"
"github.com/victorpopkov/go-appcast"
)
func main() {
a := appcast.New()
a.LoadFromURL("https://sourceforge.net/projects/filezilla/rss")
a.GenerateChecksum(appcast.SHA256)
a.ExtractReleases()
// apply some filters
a.FilterReleasesByMediaType("application/x-bzip2")
a.FilterReleasesByTitle("FileZilla_Client_Unstable", true)
a.FilterReleasesByURL("macosx")
defer a.ResetFilters() // reset
fmt.Println("Checksum:", a.GetChecksum())
fmt.Println("Provider:", a.GetProvider())
for i, release := range a.Releases {
fmt.Println(fmt.Sprintf("Release #%d:", i+1), release)
}
// Output:
// Checksum: 69886b91a041ce9d742218a77317cd99f87a14199c3f8ba094042dd9d430f7fd
// Provider: SourceForge RSS Feed
// Release #1: {3.25.2 /FileZilla_Client/3.25.2/FileZilla_3.25.2_macosx-x86.app.tar.bz2 /FileZilla_Client/3.25.2/FileZilla_3.25.2_macosx-x86.app.tar.bz2 [{https://sourceforge.net/projects/filezilla/files/FileZilla_Client/3.25.2/FileZilla_3.25.2_macosx-x86.app.tar.bz2/download application/x-bzip2; charset=binary 8453714}] 2017-04-30 12:07:25 +0000 UTC false}
// Release #2: {3.25.1 /FileZilla_Client/3.25.1/FileZilla_3.25.1_macosx-x86.app.tar.bz2 /FileZilla_Client/3.25.1/FileZilla_3.25.1_macosx-x86.app.tar.bz2 [{https://sourceforge.net/projects/filezilla/files/FileZilla_Client/3.25.1/FileZilla_3.25.1_macosx-x86.app.tar.bz2/download application/x-bzip2; charset=binary 8460741}] 2017-03-20 17:11:09 +0000 UTC false}
// Release #3: {3.25.0 /FileZilla_Client/3.25.0/FileZilla_3.25.0_macosx-x86.app.tar.bz2 /FileZilla_Client/3.25.0/FileZilla_3.25.0_macosx-x86.app.tar.bz2 [{https://sourceforge.net/projects/filezilla/files/FileZilla_Client/3.25.0/FileZilla_3.25.0_macosx-x86.app.tar.bz2/download application/x-bzip2; charset=binary 8461936}] 2017-03-13 14:36:41 +0000 UTC false}
// Release #4: {3.24.1 /FileZilla_Client/3.24.1/FileZilla_3.24.1_macosx-x86.app.tar.bz2 /FileZilla_Client/3.24.1/FileZilla_3.24.1_macosx-x86.app.tar.bz2 [{https://sourceforge.net/projects/filezilla/files/FileZilla_Client/3.24.1/FileZilla_3.24.1_macosx-x86.app.tar.bz2/download application/x-bzip2; charset=binary 8764178}] 2017-02-21 22:00:38 +0000 UTC false}
// Release #5: {3.24.0 /FileZilla_Client/3.24.0/FileZilla_3.24.0_macosx-x86.app.tar.bz2 /FileZilla_Client/3.24.0/FileZilla_3.24.0_macosx-x86.app.tar.bz2 [{https://sourceforge.net/projects/filezilla/files/FileZilla_Client/3.24.0/FileZilla_3.24.0_macosx-x86.app.tar.bz2/download application/x-bzip2; charset=binary 8765941}] 2017-01-13 20:20:31 +0000 UTC false}
}Each project that uses GitHub releases to distribute applications has its own Atom Feed available that can be considered as an appcast.
Example URL: https://github.com/atom/atom/releases.atom
package main
import (
"fmt"
"github.com/victorpopkov/go-appcast"
)
func main() {
a := appcast.New()
a.LoadFromURL("https://github.com/atom/atom/releases.atom")
a.GenerateChecksum(appcast.SHA256)
a.ExtractReleases()
fmt.Println("Checksum:", a.GetChecksum())
fmt.Println("Provider:", a.GetProvider())
for i, release := range a.Releases {
fmt.Println(fmt.Sprintf("Release #%d:", i+1), release.Version, release.Title, release.PublishedDateTime, release.IsPrerelease)
}
fmt.Println("Release #1 description:", a.Releases[0].Description)
// Output:
// Checksum: 14dd5fa8a4f880ae7c441e2fc940516e9d50b23fa110277d7696a35380cdb102
// Provider: GitHub Atom Feed
// Release #1: 1.18.0-beta2 1.18.0-beta2 2017-05-25 20:39:10 +0000 UTC true
// Release #2: 1.17.2 1.17.2 2017-05-25 20:38:59 +0000 UTC false
// Release #3: 1.18.0-beta1 1.18.0-beta1 2017-05-24 22:32:31 +0000 UTC true
// Release #4: 1.17.1 1.17.1 2017-05-24 22:40:15 +0000 UTC false
// Release #5: 1.18.0-beta0 1.18.0-beta0 2017-05-16 16:41:06 +0000 UTC true
// Release #6: 1.17.0 1.17.0 2017-05-16 16:41:24 +0000 UTC false
// Release #7: 1.17.0-beta5 1.17.0-beta5 2017-05-05 15:53:16 +0000 UTC true
// Release #8: 1.17.0-beta4 1.17.0-beta4 2017-04-26 20:51:47 +0000 UTC true
// Release #9: 1.17.0-beta3 1.17.0-beta3 2017-04-18 20:20:32 +0000 UTC true
// Release #10: 1.17.0-beta2 1.17.0-beta2 2017-04-14 16:28:23 +0000 UTC true
// Release #1 description: <p>Fixes <a href="https://github.com/atom/find-and-replace/issues/901">Find in current buffer' returns no results - atom/find-and-replace#901</a></p>
}Released under the MIT License.
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