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URL string interpolation macro (zio#2331)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| /* | ||
| * Copyright 2021 - 2023 Sporta Technologies PVT LTD & the ZIO HTTP contributors. | ||
| * | ||
| * 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 zio.http | ||
|
|
||
| import scala.language.experimental.macros | ||
| import scala.reflect.macros.blackbox | ||
|
|
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| trait UrlInterpolator { | ||
|
|
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| implicit class UrlInterpolatorHelper(val sc: StringContext) { | ||
| def url(args: Any*): URL = macro UrlInterpolatorMacro.url | ||
| } | ||
| } | ||
|
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| private[http] object UrlInterpolatorMacro { | ||
| def url(c: blackbox.Context)(args: c.Expr[Any]*): c.Expr[URL] = { | ||
| import c.universe._ | ||
| c.prefix.tree match { | ||
| case Apply(_, List(Apply(_, Literal(Constant(p: String)) :: Nil))) => | ||
| val result = URL.decode(p) match { | ||
| case Left(error) => c.abort(c.enclosingPosition, s"Invalid URL: ${error.getMessage}") | ||
| case Right(url) => | ||
| if (url.isAbsolute) { | ||
| val uri = url.encode | ||
| q"_root_.zio.http.URL.fromAbsoluteURI(new _root_.java.net.URI($uri)).get" | ||
| } else { | ||
| val uri = url.encode | ||
| q"_root_.zio.http.URL.fromRelativeURI(new _root_.java.net.URI($uri)).get" | ||
| } | ||
| } | ||
| c.Expr[URL](result) | ||
| case Apply(_, List(Apply(_, staticPartLiterals))) => | ||
| val staticParts = staticPartLiterals.map { case Literal(Constant(p: String)) => p } | ||
| val injectedPartExamples = | ||
| args.map { arg => | ||
| val typ = arg.actualType | ||
| if (typ =:= c.typeOf[String]) { | ||
| "string" | ||
| } else if (typ =:= c.typeOf[Byte]) { | ||
| "123" | ||
| } else if (typ =:= c.typeOf[Short]) { | ||
| "1234" | ||
| } else if (typ =:= c.typeOf[Int]) { | ||
| "1234" | ||
| } else if (typ =:= c.typeOf[Long]) { | ||
| "1234" | ||
| } else if (typ =:= c.typeOf[Boolean]) { | ||
| "true" | ||
| } else if (typ =:= c.typeOf[Float]) { | ||
| "1.23" | ||
| } else if (typ =:= c.typeOf[Double]) { | ||
| "1.23" | ||
| } else if (typ =:= c.typeOf[java.util.UUID]) { | ||
| "123e4567-e89b-12d3-a456-426614174000" | ||
| } else { | ||
| c.abort(c.enclosingPosition, s"Unsupported type in url interpolator: $typ") | ||
| } | ||
| } | ||
| val exampleParts = staticParts.zipAll(injectedPartExamples, "", "").flatMap { case (a, b) => List(a, b) } | ||
| val example = exampleParts.mkString | ||
| URL.decode(example) match { | ||
| case Left(error) => | ||
| c.abort(c.enclosingPosition, s"Invalid URL: ${error.getMessage}") | ||
| case Right(url) => | ||
| val parts = | ||
| staticParts.map { s => Literal(Constant(s)) } | ||
| .zipAll(args.map(_.tree), Literal(Constant("")), Literal(Constant(""))) | ||
| .flatMap { case (a, b) => List(a, b) } | ||
|
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| val concatenated = | ||
| parts.foldLeft[Tree](q"""""""") { case (acc, part) => | ||
| q"$acc + $part" | ||
| } | ||
|
|
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| val result = if (url.isAbsolute) { | ||
| q"_root_.zio.http.URL.fromAbsoluteURI(new _root_.java.net.URI($concatenated)).get" | ||
| } else { | ||
| q"_root_.zio.http.URL.fromRelativeURI(new _root_.java.net.URI($concatenated)).get" | ||
| } | ||
|
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| c.Expr[URL](result) | ||
| } | ||
| } | ||
| } | ||
| } |
114 changes: 114 additions & 0 deletions
114
zio-http/src/main/scala-3/zio/http/UrlInterpolator.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| /* | ||
| * Copyright 2021 - 2023 Sporta Technologies PVT LTD & the ZIO HTTP contributors. | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
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| package zio.http | ||
|
|
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| import scala.quoted.* | ||
|
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| trait UrlInterpolator { | ||
|
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| extension(inline sc: StringContext) { | ||
| inline def url(inline args: Any*): URL = ${ UrlInterpolatorMacro.url('sc, 'args) } | ||
| } | ||
|
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| } | ||
|
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| private[http] object UrlInterpolatorMacro { | ||
|
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| def url(sc: Expr[StringContext], args: Expr[Seq[Any]])(using Quotes): Expr[URL] = { | ||
| import quotes.reflect.* | ||
| import report.* | ||
|
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| val ctx = sc.valueOrAbort | ||
| val staticParts = ctx.parts | ||
|
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| val argExprs = args match { | ||
| case Varargs(exprs) => exprs | ||
| case _ => errorAndAbort(s"Unexpected arguments", args) | ||
| } | ||
|
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| val result = if (argExprs.isEmpty) { | ||
| URL.decode(staticParts.mkString) match { | ||
| case Left(error) => errorAndAbort(s"Invalid URL: $error", sc) | ||
| case Right(url) => | ||
| val uri = Expr(url.encode) | ||
| if (url.isAbsolute) { | ||
| '{ URL.fromAbsoluteURI(new java.net.URI($uri)).get } | ||
| } else { | ||
| '{ URL.fromRelativeURI(new java.net.URI($uri)).get } | ||
| } | ||
| } | ||
| } else { | ||
| val injectedPartExamples = | ||
| argExprs.map { arg => | ||
| val typ = arg.asTerm.tpe.asType | ||
| typ match { | ||
| case '[String] => | ||
| "string" | ||
| case '[Byte] => | ||
| "123" | ||
| case '[Short] => | ||
| "1234" | ||
| case '[Int] => | ||
| "1234" | ||
| case '[Long] => | ||
| "1234" | ||
| case '[Boolean] => | ||
| "true" | ||
| case '[Float] => | ||
| "1.23" | ||
| case '[Double] => | ||
| "1.23" | ||
| case '[java.util.UUID] => | ||
| "123e4567-e89b-12d3-a456-426614174000" | ||
| case _ => | ||
| errorAndAbort(s"Injected field ${arg.show} has an unsupported type", arg) | ||
| } | ||
| } | ||
|
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| val exampleParts = staticParts.zipAll(injectedPartExamples, "", "").flatMap { case (a, b) => List(a, b) } | ||
| val example = exampleParts.mkString | ||
|
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| URL.decode(example) match { | ||
| case Left(error) => | ||
| errorAndAbort(s"Invalid URL: $error", sc) | ||
| case Right(url) => | ||
| val parts = | ||
| staticParts.map { s => Expr(s) } | ||
| .zipAll(argExprs, Expr(""), Expr("")) | ||
| .flatMap { case (a, b) => List(a, b) } | ||
|
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| val concatenated = | ||
| parts.foldLeft[Expr[String]](Expr("")) { case (acc, part) => | ||
| '{$acc + $part} | ||
| } | ||
|
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| if (url.isAbsolute) { | ||
| '{ | ||
| URL.fromAbsoluteURI(new java.net.URI($concatenated)).get | ||
| } | ||
| } else { | ||
| '{ | ||
| URL.fromRelativeURI(new java.net.URI($concatenated)).get | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
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| result | ||
| } | ||
|
|
||
| } |
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