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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| package io.apim.samples.rest | ||
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| import io.vertx.ext.web.impl.ParsableMIMEValue | ||
| import io.vertx.rxjava3.core.MultiMap | ||
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| /** Transform a MultiMap into a simple map. Multiple values are joined in a string separated with ; */ | ||
| fun MultiMap.toSimpleMap() = this.entries() | ||
| .groupBy { it.key } | ||
| .mapValues { it.value.joinToString(";") { h -> h.value } } | ||
|
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| fun ParsableMIMEValue.isText(): Boolean { | ||
| return this.component() == "text" | ||
| } | ||
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| fun ParsableMIMEValue.isJson(): Boolean { | ||
| return this.component() == "application" && this.subComponent().contains("json") | ||
| } | ||
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| fun ParsableMIMEValue.isAvro(): Boolean { | ||
| return this.component() == "avro" || this.subComponent().contains("avro") | ||
| } |
15 changes: 15 additions & 0 deletions
15
app/src/main/kotlin/io/apim/samples/rest/ResponseHelper.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| package io.apim.samples.rest | ||
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| import io.vertx.kotlin.core.json.obj | ||
| import io.vertx.rxjava3.ext.web.RoutingContext | ||
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| fun RoutingContext.sendError(statusCode: Int, title: String, detail: String? = null) { | ||
| this.response().statusCode = statusCode | ||
| this.end(io.vertx.kotlin.core.json.json { | ||
| obj( | ||
| "title" to title, | ||
| "detail" to detail | ||
| ) | ||
| } | ||
| .toString()).subscribe() | ||
| } |
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43 changes: 43 additions & 0 deletions
43
app/src/main/kotlin/io/apim/samples/rest/avro/AvroRequestHelper.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| package io.apim.samples.rest.avro | ||
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| import io.apim.samples.avro.SerializationFormat | ||
| import io.apim.samples.rest.sendError | ||
| import io.vertx.rxjava3.ext.web.RoutingContext | ||
| import org.apache.avro.Schema | ||
| import org.apache.avro.SchemaParseException | ||
| import java.util.* | ||
|
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| fun RoutingContext.getOutputFormatFromQueryParam(param: String = "output"): OutputFormat { | ||
| val output = queryParam(param).elementAtOrNull(0) ?: "avro" | ||
| try { | ||
| return OutputFormat.valueOf(output.uppercase(Locale.getDefault())) | ||
| } catch (e: IllegalArgumentException) { | ||
| sendError(400, "Invalid $param format", "Valid values are: ${OutputFormat.values().joinToString(", ") { it.name.lowercase() }}") | ||
| throw e | ||
| } | ||
| } | ||
|
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| fun RoutingContext.getSerializationFormatFromQueryParam(param: String = "format"): SerializationFormat { | ||
| val format = queryParam(param).elementAtOrNull(0) ?: SerializationFormat.CONFLUENT.name | ||
| try { | ||
| return SerializationFormat.valueOf(format.uppercase(Locale.getDefault())) | ||
| } catch (e: IllegalArgumentException) { | ||
| sendError(400, "Invalid $param", "Valid values are: ${SerializationFormat.values().joinToString(", ") { it.name.lowercase() }}") | ||
| throw e | ||
| } | ||
| } | ||
|
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| fun RoutingContext.getSchemaFromHeader(header: String = "X-Avro-Schema"): Schema { | ||
| val schemaString = request().getHeader(header) | ||
| if (schemaString == null) { | ||
| sendError(400, "Avro schema required in $header header") | ||
| throw IllegalArgumentException("Avro schema required in $header header") | ||
| } | ||
|
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| return try { | ||
| Schema.Parser().parse(schemaString) | ||
| } catch (e: SchemaParseException) { | ||
| sendError(400, "Invalid avro schema", e.message) | ||
| throw e | ||
| } | ||
| } |
37 changes: 37 additions & 0 deletions
37
app/src/main/kotlin/io/apim/samples/rest/avro/AvroSerDeHandler.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| package io.apim.samples.rest.avro | ||
|
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| import io.apim.samples.avro.JsonSerDe | ||
| import io.apim.samples.rest.isAvro | ||
| import io.apim.samples.rest.isJson | ||
| import io.apim.samples.rest.sendError | ||
| import io.vertx.core.http.HttpHeaders | ||
| import io.vertx.ext.web.impl.ParsableMIMEValue | ||
| import io.vertx.rxjava3.core.buffer.Buffer | ||
| import io.vertx.rxjava3.ext.web.RoutingContext | ||
|
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| fun avroSerDeHandler(ctx: RoutingContext) { | ||
| val contentType = (ctx.parsedHeaders().delegate.contentType() as ParsableMIMEValue).forceParse() | ||
|
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| val schema = ctx.getSchemaFromHeader("X-Avro-Schema") | ||
| val jsonSerDe = JsonSerDe(schema) | ||
| val avroSerDe = serdeFactory.new(schema, ctx.getSerializationFormatFromQueryParam()) | ||
|
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| if(contentType.isJson()) { | ||
| val data = jsonSerDe.deserialize(ctx.body().asString()) | ||
| ctx.response().statusCode = 200 | ||
| ctx.response().putHeader(HttpHeaders.CONTENT_TYPE, "avro/binary") | ||
| ctx.end(Buffer.buffer(avroSerDe.serialize(data))).subscribe() | ||
| return | ||
| } | ||
|
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| if(contentType.isAvro()) { | ||
| val data = avroSerDe.deserialize(ctx.body().buffer().bytes) | ||
| ctx.response().statusCode = 200 | ||
| ctx.response().putHeader(HttpHeaders.CONTENT_TYPE, "application/json") | ||
| ctx.end(Buffer.buffer(jsonSerDe.serialize(data))).subscribe() | ||
| return | ||
| } | ||
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| ctx.sendError(400, "Unsupported content type") | ||
| return | ||
| } |
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