okhttp3.internal.http.StatusLine.kt Maven / Gradle / Ivy
/*
* Copyright (C) 2013 Square, Inc.
*
* 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.
*/
package okhttp3.internal.http
import java.io.IOException
import java.net.ProtocolException
import okhttp3.Protocol
import okhttp3.Response
/** An HTTP response status line like "HTTP/1.1 200 OK". */
class StatusLine(
@JvmField val protocol: Protocol,
@JvmField val code: Int,
@JvmField val message: String
) {
override fun toString(): String {
return buildString {
if (protocol == Protocol.HTTP_1_0) {
append("HTTP/1.0")
} else {
append("HTTP/1.1")
}
append(' ').append(code)
append(' ').append(message)
}
}
companion object {
/** Numeric status code, 307: Temporary Redirect. */
const val HTTP_TEMP_REDIRECT = 307
const val HTTP_PERM_REDIRECT = 308
/** RFC 7540, Section 9.1.2. Retry these if the exchange used connection coalescing. */
const val HTTP_MISDIRECTED_REQUEST = 421
const val HTTP_CONTINUE = 100
fun get(response: Response): StatusLine {
return StatusLine(response.protocol, response.code, response.message)
}
@Throws(IOException::class)
fun parse(statusLine: String): StatusLine {
// H T T P / 1 . 1 2 0 0 T e m p o r a r y R e d i r e c t
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0
// Parse protocol like "HTTP/1.1" followed by a space.
val codeStart: Int
val protocol: Protocol
if (statusLine.startsWith("HTTP/1.")) {
if (statusLine.length < 9 || statusLine[8] != ' ') {
throw ProtocolException("Unexpected status line: $statusLine")
}
val httpMinorVersion = statusLine[7] - '0'
codeStart = 9
protocol = if (httpMinorVersion == 0) {
Protocol.HTTP_1_0
} else if (httpMinorVersion == 1) {
Protocol.HTTP_1_1
} else {
throw ProtocolException("Unexpected status line: $statusLine")
}
} else if (statusLine.startsWith("ICY ")) {
// Shoutcast uses ICY instead of "HTTP/1.0".
protocol = Protocol.HTTP_1_0
codeStart = 4
} else {
throw ProtocolException("Unexpected status line: $statusLine")
}
// Parse response code like "200". Always 3 digits.
if (statusLine.length < codeStart + 3) {
throw ProtocolException("Unexpected status line: $statusLine")
}
val code = try {
Integer.parseInt(statusLine.substring(codeStart, codeStart + 3))
} catch (_: NumberFormatException) {
throw ProtocolException("Unexpected status line: $statusLine")
}
// Parse an optional response message like "OK" or "Not Modified". If it
// exists, it is separated from the response code by a space.
var message = ""
if (statusLine.length > codeStart + 3) {
if (statusLine[codeStart + 3] != ' ') {
throw ProtocolException("Unexpected status line: $statusLine")
}
message = statusLine.substring(codeStart + 4)
}
return StatusLine(protocol, code, message)
}
}
}