86 lines
3.3 KiB
Kotlin
86 lines
3.3 KiB
Kotlin
package com.github.insanusmokrassar.TelegramBotAPI.bot.Ktor
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import com.github.insanusmokrassar.TelegramBotAPI.bot.BaseRequestsExecutor
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import com.github.insanusmokrassar.TelegramBotAPI.bot.Ktor.base.MultipartRequestCallFactory
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import com.github.insanusmokrassar.TelegramBotAPI.bot.Ktor.base.SimpleRequestCallFactory
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import com.github.insanusmokrassar.TelegramBotAPI.bot.exceptions.newRequestException
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import com.github.insanusmokrassar.TelegramBotAPI.bot.settings.limiters.EmptyLimiter
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import com.github.insanusmokrassar.TelegramBotAPI.bot.settings.limiters.RequestLimiter
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import com.github.insanusmokrassar.TelegramBotAPI.requests.abstracts.Request
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import com.github.insanusmokrassar.TelegramBotAPI.types.Response
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import com.github.insanusmokrassar.TelegramBotAPI.types.RetryAfterError
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import io.ktor.client.HttpClient
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import io.ktor.client.call.HttpClientCall
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import io.ktor.client.engine.HttpClientEngine
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import io.ktor.util.cio.toByteArray
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import kotlinx.coroutines.delay
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import kotlinx.io.charsets.Charset
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import kotlinx.serialization.json.Json
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class KtorRequestsExecutor(
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token: String,
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private val client: HttpClient = HttpClient(),
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hostUrl: String = "https://api.telegram.org",
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callsFactories: List<KtorCallFactory> = emptyList(),
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excludeDefaultFactories: Boolean = false,
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private val requestsLimiter: RequestLimiter = EmptyLimiter,
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private val jsonFormatter: Json = Json.nonstrict
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) : BaseRequestsExecutor(token, hostUrl) {
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constructor(
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token: String,
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engine: HttpClientEngine? = null,
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hostUrl: String = "https://api.telegram.org"
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) : this(
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token,
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engine ?.let { HttpClient(engine) } ?: HttpClient(),
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hostUrl
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)
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private val callsFactories: List<KtorCallFactory> = callsFactories.run {
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if (!excludeDefaultFactories) {
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asSequence().plus(SimpleRequestCallFactory()).plus(MultipartRequestCallFactory()).toList()
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} else {
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this
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}
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}
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override suspend fun <T : Any> execute(request: Request<T>): T {
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return requestsLimiter.limit {
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var call: HttpClientCall? = null
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for (factory in callsFactories) {
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call = factory.prepareCall(
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client,
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baseUrl,
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request
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)
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if (call != null) {
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break
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}
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}
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if (call == null) {
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throw IllegalArgumentException("Can't execute request: $request")
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}
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val content = call.response.content.toByteArray().toString(Charset.defaultCharset())
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val responseObject = jsonFormatter.parse(
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Response.serializer(request.resultSerializer()),
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content
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)
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responseObject.result ?: responseObject.parameters ?.let {
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val error = it.error
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if (error is RetryAfterError) {
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delay(error.leftToRetry)
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execute(request)
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} else {
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null
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}
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} ?: call.let {
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throw newRequestException(
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responseObject,
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content,
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"Can't get result object from $content"
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)
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}
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}
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}
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}
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