commonMain.io.ktor.http.DateUtils.kt Maven / Gradle / Ivy
/*
* Copyright 2014-2021 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
*/
package io.ktor.http
import io.ktor.util.date.*
import kotlin.native.concurrent.*
private val HTTP_DATE_FORMATS = listOf(
"***, dd MMM YYYY hh:mm:ss zzz",
"****, dd-MMM-YYYY hh:mm:ss zzz",
"*** MMM d hh:mm:ss YYYY",
"***, dd-MMM-YYYY hh:mm:ss zzz",
"***, dd-MMM-YYYY hh-mm-ss zzz",
"***, dd MMM YYYY hh:mm:ss zzz",
"*** dd-MMM-YYYY hh:mm:ss zzz",
"*** dd MMM YYYY hh:mm:ss zzz",
"*** dd-MMM-YYYY hh-mm-ss zzz",
"***,dd-MMM-YYYY hh:mm:ss zzz",
"*** MMM d YYYY hh:mm:ss zzz"
)
/**
* Convert valid http date [String] to [GMTDate] trying various http date formats from [HTTP_DATE_FORMATS]
*
* Note that only GMT(UTC) date is valid http date.
*/
public fun String.fromHttpToGmtDate(): GMTDate = with(trim()) {
for (format in HTTP_DATE_FORMATS) {
try {
val parser = GMTDateParser(format)
return parser.parse(this@fromHttpToGmtDate)
} catch (_: InvalidDateStringException) {
}
}
error("Failed to parse date: $this")
}
/**
* Convert valid cookie date [String] to [GMTDate] trying first the RFC6265 standard, falling back on [fromHttpToGmtDate]
*
* @see [fromHttpToGmtDate]
*/
public fun String.fromCookieToGmtDate(): GMTDate = with(trim()) {
try {
val parser = CookieDateParser()
return parser.parse(this@with)
} catch (_: InvalidCookieDateException) {
}
return fromHttpToGmtDate()
}
/**
* Convert [GMTDate] to valid http date [String]
*/
public fun GMTDate.toHttpDate(): String = buildString {
append("${dayOfWeek.value}, ")
append("${dayOfMonth.padZero(2)} ")
append("${month.value} ")
append(year.padZero(4))
append(" ${hours.padZero(2)}:${minutes.padZero(2)}:${seconds.padZero(2)} ")
append("GMT")
}
private fun Int.padZero(length: Int): String = toString().padStart(length, '0')