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Sse #451

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Sse #451

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84a2d3b
adding sse
harikrishnan83 May 22, 2022
616cb57
adding streaming response
harikrishnan83 May 23, 2022
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50 changes: 48 additions & 2 deletions core/src/main/kotlin/in/specmatic/stub/HttpStub.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,9 @@ import io.ktor.server.engine.*
import io.ktor.server.netty.*
import io.ktor.util.asStream
import io.ktor.util.toMap
import kotlinx.coroutines.channels.ReceiveChannel
import kotlinx.coroutines.channels.broadcast
import kotlinx.coroutines.channels.produce
import kotlinx.coroutines.delay
import kotlinx.coroutines.runBlocking
import java.io.ByteArrayOutputStream
Expand Down Expand Up @@ -83,8 +86,30 @@ class HttpStub(private val features: List<Feature>, _httpStubs: List<HttpStubDat
else -> serveStubResponse(httpRequest)
}

respondToKtorHttpResponse(call, httpStubResponse.response, httpStubResponse.delayInSeconds)
httpLogMessage.addResponse(httpStubResponse)
if(httpRequest.path!!.startsWith("""/features/default""")) {
val channel = produce { // this: ProducerScope<SseEvent> ->
var n = 0
send(SseEvent("""{"status":"discover"}""", "ack"))
delay(1000)
send(SseEvent("""[{"id":"8b6002e8-e97a-4ebe-8cae-ac68fb99fc33","key":"F04","l":true,"version":5,"type":"BOOLEAN","value":false},{"id":"b5bf7f9e-9391-40a4-8808-61ad73f800e9","key":"FS01","l":true,"version":16,"type":"STRING","value":"purple"},{"id":"94399e94-b608-4a81-9804-9c442aad6a68","key":"FTTTT","l":false,"version":0,"type":"JSON"},{"id":"2f2096c2-bf1b-4310-aab6-79819d1b7fa6","key":"FT01","l":false,"version":29,"type":"BOOLEAN","value":true},{"id":"41552453-d1eb-4f62-91ca-a38d7a80bf8e","key":"FS02","l":true,"version":2,"type":"STRING","value":"HybrisV2"},{"id":"a0b72213-aebb-49ed-8793-4dbddd979d83","key":"FT09","l":false,"version":4,"type":"BOOLEAN","value":false},{"id":"249677f8-78bc-42c3-ad26-8c24d59efec6","key":"FT02","l":false,"version":2,"type":"BOOLEAN","value":false},{"id":"190c58d6-0453-4a51-8000-cb94aee7d2db","key":"FT05","l":false,"version":2,"type":"BOOLEAN","value":false},{"id":"33854160-3a2e-40cd-8297-7a2fd1fc9492","key":"FT07","l":false,"version":2,"type":"BOOLEAN","value":false},{"id":"45a2da05-dd51-4e63-8cb9-a0b4a5a86d22","key":"SampleKey","l":true,"version":1,"type":"BOOLEAN","value":false},{"id":"2d91fe8f-18bc-4b7a-abaa-4d24c7018d24","key":"11_FT01","l":true,"version":1,"type":"BOOLEAN","value":false},{"id":"5a0575cd-1b15-4e04-b0a5-8cb008603df4","key":"FJ01","l":false,"version":0,"type":"JSON"},{"id":"afae6daf-25f4-4e68-baee-4fe1f36cc623","key":"FT1234","l":true,"version":1,"type":"BOOLEAN","value":false},{"id":"70c992dc-1a5c-4290-a476-3aa6c1e619b1","key":"FT06","l":false,"version":4,"type":"BOOLEAN","value":false},{"id":"04ec642e-d722-4834-998b-648ed1c54f6b","key":"FS03","l":true,"version":3,"type":"STRING","value":"V1.1"}]"""
, "features", "ef0c67ba"))
delay(1000)
while (true) {
send(SseEvent("""{"status":"closed"}""", "bye"))
delay(1000)
n++
}
}.broadcast()
val events = channel.openSubscription()
try {
call.respondSse(events)
} finally {
events.cancel()
}
} else {
respondToKtorHttpResponse(call, httpStubResponse.response, httpStubResponse.delayInSeconds)
httpLogMessage.addResponse(httpStubResponse)
}
}
catch(e: ContractException) {
val response = badRequest(e.report())
Expand Down Expand Up @@ -482,3 +507,24 @@ fun stringToMockScenario(text: Value): ScenarioStub {

return mockFromJSON(mockSpec)
}

data class SseEvent(val data: String, val event: String? = null, val id: String? = null)

suspend fun ApplicationCall.respondSse(events: ReceiveChannel<SseEvent>) {
response.cacheControl(CacheControl.NoCache(null))
respondTextWriter(contentType = ContentType.Text.EventStream) {
for (event in events) {
if (event.id != null) {
write("id: ${event.id}\n")
}
if (event.event != null) {
write("event: ${event.event}\n")
}
for (dataLine in event.data.lines()) {
write("data: $dataLine\n")
}
write("\n")
flush()
}
}
}