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sinks/src/main/scala/com.snowplowanalytics.snowplow.eventgen/Http.scala
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| /* | ||
| * Copyright (c) 2021-2023 Snowplow Analytics Ltd. All rights reserved. | ||
| * | ||
| * This program is licensed to you under the Apache License Version 2.0, | ||
| * and you may not use this file except in compliance with the Apache License Version 2.0. | ||
| * You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0. | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, | ||
| * software distributed under the Apache License Version 2.0 is distributed on an | ||
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the Apache License Version 2.0 for the specific language governing permissions and limitations there under. | ||
| */ | ||
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| package com.snowplowanalytics.snowplow.eventgen | ||
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| import com.snowplowanalytics.snowplow.eventgen.tracker.HttpRequest | ||
| import com.snowplowanalytics.snowplow.eventgen.tracker.HttpRequest.{Method => TrackerMethod} | ||
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| import fs2.{Pipe, Stream} | ||
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| import cats.syntax.all._ | ||
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| import cats.effect.Async | ||
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| import org.http4s.ember.client.EmberClientBuilder | ||
| import org.http4s.Request | ||
| import org.http4s.Header.Raw | ||
| import org.http4s.Method | ||
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| import org.typelevel.ci._ | ||
| import com.snowplowanalytics.snowplow.eventgen.tracker.HttpRequestQuerystring | ||
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| object Http { | ||
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| def sink[F[_]: Async](properties: Config.Output.Http): Pipe[F, Main.GenOutput, Unit] = { | ||
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| def buildRequesst( | ||
| generatedRequest: HttpRequest | ||
| ): Request[F] = { | ||
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| // Origin headers are given to us a key and a comma separated string of values, | ||
| // but we wish to attach each value as a header with the provided key ("Origin") | ||
| // This function provides a Seq of Raw headers (the type that putHeaders expects) | ||
| // containing an item for each origin header, and an item each for the other headers. | ||
| def parseHeaders(headers: Map[String, String]): Seq[Raw] = { | ||
| headers | ||
| .map(kv => (kv._1, kv._2) match { | ||
| case (k, v) if k == "Origin" => | ||
| v.split(",") | ||
| .map(v => Raw(CIString(k), v)) | ||
| .toSeq | ||
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| // Raw(CIString(k), v) | ||
| case (_, _) => Seq(Raw(CIString(kv._1), kv._2)) | ||
| }) | ||
| .toSeq | ||
| .flatten | ||
| } | ||
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| // since /i requests have empty version, we pattern match to add the path. | ||
| // address is a var since we modify it when adding querystring | ||
| var address = generatedRequest.method.path.version match { | ||
| case "" => properties.endpoint / generatedRequest.method.path.vendor | ||
| case version: String => properties.endpoint / generatedRequest.method.path.vendor / version | ||
| } | ||
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| val body = generatedRequest.body match { | ||
| case Some(b) => b.toString() | ||
| case _ => "" | ||
| } | ||
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| val req = generatedRequest.method match { | ||
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| // POST requests: attach body, use the uri we already have, without adding querysring | ||
| case TrackerMethod.Post(_) => | ||
| Request[F](method = Method.POST, uri = address).withEntity(body).putHeaders(parseHeaders(generatedRequest.headers)) | ||
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| // GET requests: add querystring, ignore body field | ||
| case TrackerMethod.Get(_) => | ||
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| // iterate querystring and add as kv pairs to the address | ||
| generatedRequest.qs match { | ||
| case None => address | ||
| case Some(querystring: HttpRequestQuerystring) => | ||
| // val newUri = address | ||
| querystring.toProto | ||
| querystring.toProto.foreach(kv => | ||
| address = address.withQueryParam(kv.getName(), kv.getValue()) | ||
| ) | ||
| } | ||
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| Request[F](method = Method.GET, uri = address).putHeaders(parseHeaders(generatedRequest.headers)) | ||
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| // HEAD requests induce server errors that will take some digging to figure out. | ||
| // In the interest of getting to a usable tool quickly, for now we just throw an error for these. | ||
| case TrackerMethod.Head(_) => throw new NotImplementedError ( "HEAD requests not implemented" ) | ||
| } | ||
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| return req | ||
| } | ||
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| val httpClient = EmberClientBuilder.default[F].build | ||
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| st: Stream[F, Main.GenOutput] => { | ||
| Stream | ||
| .resource(httpClient) | ||
| .flatMap(client => | ||
| st.map(_._3).map(buildRequesst).evalMap(req => client.status(req)).void) | ||
| } | ||
| } | ||
| } |
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