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Implement multipart support for jdkhttp-server
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91 changes: 91 additions & 0 deletions
91
...er/jdkhttp-server/src/main/scala/sttp/tapir/server/jdkhttp/internal/ParsedMultiPart.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| package sttp.tapir.server.jdkhttp.internal | ||
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| import com.sun.net.httpserver.HttpExchange | ||
| import sttp.model.Header | ||
| import java.io.{BufferedReader, InputStreamReader} | ||
|
|
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| case class ParsedMultiPart(headers: Map[String, Seq[String]], body: Array[Byte]) { | ||
| def getHeader(headerName: String): Option[String] = headers.get(headerName).flatMap(_.headOption) | ||
| def fileItemHeaders: Seq[Header] = headers.toSeq.flatMap { case (name, values) => values.map(value => Header(name, value)) } | ||
|
|
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| def getDispositionParams: Map[String, String] = { | ||
| val headerValue = getHeader("content-disposition") | ||
| headerValue | ||
| .map( | ||
| _.split(";") | ||
| .map(_.trim) | ||
| .tail | ||
| .map(_.split("=")) | ||
| .map(array => array(0) -> array(1)) | ||
| .toMap | ||
| ) | ||
| .getOrElse(Map.empty) | ||
| } | ||
|
|
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| def getName: Option[String] = | ||
| headers | ||
| .getOrElse("content-disposition", Seq.empty) | ||
| .headOption | ||
| .flatMap( | ||
| _.split(";") | ||
| .find(_.trim.startsWith("name")) | ||
| .map(_.split("=")(1).trim) | ||
| .map(_.replaceAll("^\"|\"$", "")) | ||
| ) | ||
|
|
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| def addHeader(l: String): ParsedMultiPart = { | ||
| val (name, value) = l.splitAt(l.indexOf(":")) | ||
| val headerName = name.trim.toLowerCase | ||
| val headerValue = value.stripPrefix(":").trim | ||
| val newHeaderEntry = (headerName -> (this.headers.getOrElse(headerName, Seq.empty) :+ headerValue)) | ||
| this.copy(headers = headers + newHeaderEntry) | ||
| } | ||
|
|
||
| } | ||
|
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| object ParsedMultiPart { | ||
| def empty: ParsedMultiPart = new ParsedMultiPart(Map.empty, Array.empty) | ||
|
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| sealed trait ParseState | ||
| case object Default extends ParseState | ||
| case object AfterBoundary extends ParseState | ||
| case object AfterHeaderSpace extends ParseState | ||
|
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| private case class ParseData( | ||
| currentPart: ParsedMultiPart, | ||
| completedParts: List[ParsedMultiPart], | ||
| parseState: ParseState | ||
| ) { | ||
| def changeState(state: ParseState): ParseData = this.copy(parseState = state) | ||
| def addHeader(header: String): ParseData = this.copy(currentPart = currentPart.addHeader(header)) | ||
| def addBody(body: Array[Byte]): ParseData = this.copy(currentPart = currentPart.copy(body = currentPart.body ++ body)) | ||
| def completePart(): ParseData = this.currentPart.getName match { | ||
| case Some(_) => | ||
| this.copy( | ||
| completedParts = completedParts :+ currentPart, | ||
| currentPart = empty, | ||
| parseState = AfterBoundary | ||
| ) | ||
| case None => changeState(AfterBoundary) | ||
| } | ||
| } | ||
|
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| def parseMultipartBody(httpExchange: HttpExchange, boundary: String): Seq[ParsedMultiPart] = { | ||
| val reader = new BufferedReader(new InputStreamReader(httpExchange.getRequestBody)) | ||
| val initialParseState: ParseData = ParseData(empty, List.empty, Default) | ||
| Iterator | ||
| .continually(reader.readLine()) | ||
| .takeWhile(_ != null) | ||
| .foldLeft(initialParseState) { case (state, line) => | ||
| state.parseState match { | ||
| case Default if line.startsWith(boundary) => state.changeState(AfterBoundary) | ||
| case Default => state | ||
| case AfterBoundary if line.trim.isEmpty => state.changeState(AfterHeaderSpace) | ||
| case AfterBoundary => state.addHeader(line) | ||
| case AfterHeaderSpace if !line.startsWith(boundary) => state.addBody(line.getBytes()) | ||
| case AfterHeaderSpace => state.completePart() | ||
| } | ||
| } | ||
| .completedParts | ||
| } | ||
| } |
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