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package org.jetbrains.dokka.base.resolvers.local
import org.jetbrains.dokka.DokkaConfiguration
import org.jetbrains.dokka.DokkaConfiguration.DokkaSourceSet
import org.jetbrains.dokka.base.DokkaBase
import org.jetbrains.dokka.links.DRI
import org.jetbrains.dokka.plugability.DokkaContext
import org.jetbrains.dokka.plugability.plugin
import org.jetbrains.dokka.plugability.query
import java.lang.IllegalStateException
import java.net.HttpURLConnection
import java.net.URL
import java.net.URLConnection
abstract class BaseLocationProvider(protected val dokkaContext: DokkaContext) : LocationProvider {
protected val externalLocationProviderFactories =
dokkaContext.plugin<DokkaBase>().query { externalLocationProviderFactory }
protected fun getExternalLocation(
dri: DRI,
sourceSets: Set<DokkaSourceSet>
): String {
val jdkToExternalDocumentationLinks = dokkaContext.configuration.sourceSets
.filter { sourceSet ->
sourceSets.contains(sourceSet)
}
.groupBy({ it.jdkVersion }, { it.externalDocumentationLinks })
.map { it.key to it.value.flatten().distinct() }.toMap()
val toResolve: MutableMap<Int, MutableList<DokkaConfiguration.ExternalDocumentationLink>> = mutableMapOf()
for ((jdk, links) in jdkToExternalDocumentationLinks) {
for (link in links) {
val info = cache[link.packageListUrl]
if (info == null) {
toResolve.getOrPut(jdk) { mutableListOf() }.add(link)
} else if (info.packages.contains(dri.packageName)) {
return link.url.toExternalForm() + getLink(dri, info)
}
}
}
// Not in cache, resolve packageLists
for ((jdk, links) in toResolve) {
for (link in links) {
if (dokkaContext.configuration.offlineMode && link.packageListUrl.protocol.toLowerCase() != "file")
continue
val locationInfo =
loadPackageList(jdk, link.packageListUrl)
if (locationInfo.packages.contains(dri.packageName)) {
return link.url.toExternalForm() + getLink(dri, locationInfo)
}
}
toResolve.remove(jdk)
}
return ""
}
private val cache: MutableMap<URL, DefaultLocationProvider.LocationInfo> = mutableMapOf()
private fun getLink(dri: DRI, locationInfo: DefaultLocationProvider.LocationInfo): String =
locationInfo.locations[dri.packageName + "." + dri.classNames]
?: // Not sure if it can be here, previously it shadowed only kotlin/dokka related sources, here it shadows both dokka/javadoc, cause I cannot distinguish what LocationProvider has been hypothetically chosen
if (locationInfo.externalLocationProvider != null)
with(locationInfo.externalLocationProvider) {
dri.toLocation()
}
else
throw IllegalStateException("Have not found any convenient ExternalLocationProvider for $dri DRI!")
private fun loadPackageList(jdk: Int, url: URL): DefaultLocationProvider.LocationInfo {
val packageListStream = url.doOpenConnectionToReadContent().getInputStream()
val (params, packages) =
packageListStream
.bufferedReader()
.useLines { lines -> lines.partition { it.startsWith(DOKKA_PARAM_PREFIX) } }
val paramsMap = params.asSequence()
.map { it.removePrefix(DOKKA_PARAM_PREFIX).split(":", limit = 2) }
.groupBy({ (key, _) -> key }, { (_, value) -> value })
val format = paramsMap["format"]?.singleOrNull() ?: when {
jdk < 8 -> "javadoc1" // Covers JDK 1 - 7
jdk < 10 -> "javadoc8" // Covers JDK 8 - 9
else -> "javadoc10" // Covers JDK 10+
}
val locations = paramsMap["location"].orEmpty()
.map { it.split("\u001f", limit = 2) }
.map { (key, value) -> key to value }
.toMap()
val externalLocationProvider =
externalLocationProviderFactories.asSequence().map { it.getExternalLocationProvider(format) }
.filterNotNull().take(1).firstOrNull()
val info = DefaultLocationProvider.LocationInfo(
externalLocationProvider,
packages.toSet(),
locations
)
cache[url] = info
return info
}
private fun URL.doOpenConnectionToReadContent(timeout: Int = 10000, redirectsAllowed: Int = 16): URLConnection {
val connection = this.openConnection().apply {
connectTimeout = timeout
readTimeout = timeout
}
when (connection) {
is HttpURLConnection -> {
return when (connection.responseCode) {
in 200..299 -> {
connection
}
HttpURLConnection.HTTP_MOVED_PERM,
HttpURLConnection.HTTP_MOVED_TEMP,
HttpURLConnection.HTTP_SEE_OTHER -> {
if (redirectsAllowed > 0) {
val newUrl = connection.getHeaderField("Location")
URL(newUrl).doOpenConnectionToReadContent(timeout, redirectsAllowed - 1)
} else {
throw RuntimeException("Too many redirects")
}
}
else -> {
throw RuntimeException("Unhandled http code: ${connection.responseCode}")
}
}
}
else -> return connection
}
}
companion object {
const val DOKKA_PARAM_PREFIX = "\$dokka."
}
}
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