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/*
* This file is part of GNU Taler
* (C) 2020 Taler Systems S.A.
*
* GNU Taler 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, or (at your option) any later version.
*
* GNU Taler 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
* GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
package net.taler.cashier
import android.util.Log
import androidx.annotation.WorkerThread
import net.taler.cashier.config.Config
import okhttp3.Authenticator
import okhttp3.Credentials
import okhttp3.MediaType.Companion.toMediaTypeOrNull
import okhttp3.OkHttpClient
import okhttp3.Request
import okhttp3.RequestBody.Companion.toRequestBody
import okhttp3.Response
import okhttp3.Route
import org.json.JSONException
import org.json.JSONObject
object HttpHelper {
private val TAG = HttpHelper::class.java.simpleName
private const val MIME_TYPE_JSON = "application/json"
@WorkerThread
fun makeJsonGetRequest(url: String, config: Config): HttpJsonResult {
val request = Request.Builder()
.addHeader("Accept", MIME_TYPE_JSON)
.url(url)
.get()
.build()
val response = try {
getHttpClient(config.username, config.password)
.newCall(request)
.execute()
} catch (e: Exception) {
Log.e(TAG, "Error retrieving $url", e)
return HttpJsonResult.Error(0)
}
return if (response.code == 200 && response.body != null) {
val jsonObject = JSONObject(response.body!!.string())
HttpJsonResult.Success(jsonObject)
} else {
Log.e(TAG, "Received status ${response.code} from $url expected 200")
HttpJsonResult.Error(response.code, getErrorBody(response))
}
}
private val MEDIA_TYPE_JSON = "$MIME_TYPE_JSON; charset=utf-8".toMediaTypeOrNull()
@WorkerThread
fun makeJsonPostRequest(url: String, body: JSONObject, config: Config): HttpJsonResult {
val request = Request.Builder()
.addHeader("Accept", MIME_TYPE_JSON)
.url(url)
.post(body.toString().toRequestBody(MEDIA_TYPE_JSON))
.build()
val response = try {
getHttpClient(config.username, config.password)
.newCall(request)
.execute()
} catch (e: Exception) {
Log.e(TAG, "Error retrieving $url", e)
return HttpJsonResult.Error(0)
}
return if (response.code == 200 && response.body != null) {
val jsonObject = JSONObject(response.body!!.string())
HttpJsonResult.Success(jsonObject)
} else {
Log.e(TAG, "Received status ${response.code} from $url expected 200")
HttpJsonResult.Error(response.code, getErrorBody(response))
}
}
private fun getHttpClient(username: String, password: String) =
OkHttpClient.Builder().authenticator(object : Authenticator {
override fun authenticate(route: Route?, response: Response): Request? {
val credential = Credentials.basic(username, password)
if (credential == response.request.header("Authorization")) {
// If we already failed with these credentials, don't retry
return null
}
return response
.request
.newBuilder()
.header("Authorization", credential)
.build()
}
}).build()
private fun getErrorBody(response: Response): String? {
val body = response.body?.string() ?: return null
Log.e(TAG, "Response body: $body")
return try {
val json = JSONObject(body)
"${json.optString("ec")} ${json.optString("error")}"
} catch (e: JSONException) {
null
}
}
}
sealed class HttpJsonResult {
class Error(val statusCode: Int, private val errorMsg: String? = null) : HttpJsonResult() {
val msg: String
get() = errorMsg?.let { "\n\n$statusCode $it" } ?: "$statusCode"
}
class Success(val json: JSONObject) : HttpJsonResult()
}
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