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src/main/kotlin/cc/unitmesh/devti/llms/azure/ResponseBodyCallback.kt
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| // MIT License | ||
| // | ||
| //Copyright (c) [year] [fullname] | ||
| // | ||
| //Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| //of this software and associated documentation files (the "Software"), to deal | ||
| //in the Software without restriction, including without limitation the rights | ||
| //to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| //copies of the Software, and to permit persons to whom the Software is | ||
| //furnished to do so, subject to the following conditions: | ||
| // | ||
| //The above copyright notice and this permission notice shall be included in all | ||
| //copies or substantial portions of the Software. | ||
| // | ||
| //THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| //IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| //FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| //AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| //LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| //OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| //SOFTWARE. | ||
| package cc.unitmesh.devti.llms.azure | ||
|
|
||
| import com.theokanning.openai.OpenAiError | ||
| import com.theokanning.openai.OpenAiHttpException | ||
| import com.theokanning.openai.service.OpenAiService | ||
| import com.theokanning.openai.service.SSE | ||
| import com.theokanning.openai.service.SSEFormatException | ||
| import io.reactivex.FlowableEmitter | ||
| import okhttp3.Call | ||
| import okhttp3.Callback | ||
| import okhttp3.Response | ||
| import org.apache.commons.httpclient.HttpException | ||
| import java.io.BufferedReader | ||
| import java.io.IOException | ||
| import java.io.InputStreamReader | ||
| import java.nio.charset.StandardCharsets | ||
|
|
||
| /** | ||
| * Callback to parse Server Sent Events (SSE) from raw InputStream and | ||
| * emit the events with io.reactivex.FlowableEmitter to allow streaming of | ||
| * SSE. | ||
| */ | ||
| class ResponseBodyCallback(private val emitter: FlowableEmitter<SSE>, private val emitDone: Boolean) : Callback { | ||
| override fun onResponse(call: Call, response: Response) { | ||
| var reader: BufferedReader? = null | ||
| try { | ||
| if (!response.isSuccessful) { | ||
| val e = HttpException(response.body.toString()) | ||
| val errorBody = response.body | ||
| if (errorBody == null) { | ||
| throw e | ||
| } else { | ||
| val error = mapper.readValue( | ||
| errorBody.string(), | ||
| OpenAiError::class.java | ||
| ) | ||
| throw OpenAiHttpException(error, e, e.reasonCode) | ||
| } | ||
| } | ||
| val inputStream = response.body!!.byteStream() | ||
| reader = BufferedReader(InputStreamReader(inputStream, StandardCharsets.UTF_8)) | ||
| var line = "" | ||
| var sse: SSE? = null | ||
| while (!emitter.isCancelled && reader.readLine().also { line = it } != null) { | ||
| sse = if (line.startsWith("data:")) { | ||
| val data = line.substring(5).trim { it <= ' ' } | ||
| SSE(data) | ||
| } else if (line == "" && sse != null) { | ||
| if (sse.isDone) { | ||
| if (emitDone) { | ||
| emitter.onNext(sse) | ||
| } | ||
| break | ||
| } | ||
| emitter.onNext(sse) | ||
| null | ||
| } else { | ||
| throw SSEFormatException("Invalid sse format! $line") | ||
| } | ||
| } | ||
| emitter.onComplete() | ||
| } catch (t: Throwable) { | ||
| onFailure(call, t as IOException) | ||
| } finally { | ||
| if (reader != null) { | ||
| try { | ||
| reader.close() | ||
| } catch (e: IOException) { | ||
| // do nothing | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| override fun onFailure(call: Call, e: IOException) { | ||
| emitter.onError(e) | ||
| } | ||
|
|
||
| companion object { | ||
| private val mapper = OpenAiService.defaultObjectMapper() | ||
| } | ||
| } |