TheCitadelofRicks/src/main/kotlin/org/mosad/thecitadelofricks/hsoparser/CourseListParser.kt

97 lines
3.5 KiB
Kotlin

/**
* TheCitadelofRicks
*
* Copyright 2019-2020 <seil0@mosad.xyz>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
*/
package org.mosad.thecitadelofricks.hsoparser
import org.jsoup.Jsoup
import org.mosad.thecitadelofricks.Course
import org.slf4j.LoggerFactory
import java.net.SocketTimeoutException
import java.security.KeyManagementException
import java.security.cert.CertificateException
import java.security.cert.X509Certificate
import javax.net.ssl.SSLContext
import javax.net.ssl.SSLSocketFactory
import javax.net.ssl.TrustManager
import javax.net.ssl.X509TrustManager
class CourseListParser {
private var logger: org.slf4j.Logger = LoggerFactory.getLogger(MensaParser::class.java)
/**
* return a list of all courses at courseListURL
* @param courseListURL the url to the course list page
* @return a ArrayList<Course> with all courses or null if the request was not successful
*/
fun getCourseLinks(courseListURL: String): HashMap<String, Course>? {
val courseLinkList = HashMap<String, Course>()
try {
val courseHTML = Jsoup.connect(courseListURL).sslSocketFactory(socketFactory()).get()
courseHTML.select("ul.index-group").select("li.Class").select("a[href]").forEachIndexed { _, element ->
courseLinkList[element.text()] = Course(
element.text(),
element.attr("href").replace("http", "https")
)
}
} catch (ex: SocketTimeoutException) {
logger.warn("timeout from hs-offenburg.de, updating on next attempt!")
return null
} catch (gex: Exception) {
logger.error("general CourseListParser error", gex)
return null
}
return courseLinkList
}
// Hack to ignore ssl errors while reading
private fun socketFactory(): SSLSocketFactory {
val trustAllCerts = arrayOf<TrustManager>(object : X509TrustManager {
@Throws(CertificateException::class)
override fun checkClientTrusted(chain: Array<X509Certificate>, authType: String) {
}
@Throws(CertificateException::class)
override fun checkServerTrusted(chain: Array<X509Certificate>, authType: String) {
}
override fun getAcceptedIssuers(): Array<X509Certificate> {
return arrayOf()
}
})
try {
val sslContext = SSLContext.getInstance("TLS")
sslContext.init(null, trustAllCerts, java.security.SecureRandom())
return sslContext.socketFactory
} catch (e: Exception) {
when (e) {
is RuntimeException, is KeyManagementException -> {
throw RuntimeException("Failed to create a SSL socket factory", e)
}
else -> throw e
}
}
}
}