first commit

This commit is contained in:
Beyhan Oğur
2026-04-26 21:52:23 +03:00
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// Package mistral implements the Mistral provider.
package mistral
import (
"context"
"errors"
"io"
"net/http"
"strings"
"time"
"github.com/bytedance/sonic"
"github.com/maximhq/bifrost/core/providers/openai"
providerUtils "github.com/maximhq/bifrost/core/providers/utils"
schemas "github.com/maximhq/bifrost/core/schemas"
"github.com/valyala/fasthttp"
)
// MistralProvider implements the Provider interface for Mistral's API.
type MistralProvider struct {
logger schemas.Logger // Logger for provider operations
client *fasthttp.Client // HTTP client for unary API requests (ReadTimeout bounds overall response)
streamingClient *fasthttp.Client // HTTP client for streaming API requests (no ReadTimeout; idle governed by NewIdleTimeoutReader)
networkConfig schemas.NetworkConfig // Network configuration including extra headers
customProviderConfig *schemas.CustomProviderConfig
sendBackRawRequest bool // Whether to include raw request in BifrostResponse
sendBackRawResponse bool // Whether to include raw response in BifrostResponse
}
// NewMistralProvider creates a new Mistral provider instance.
// It initializes the HTTP client with the provided configuration and sets up response pools.
// The client is configured with timeouts, concurrency limits, and optional proxy settings.
func NewMistralProvider(config *schemas.ProviderConfig, logger schemas.Logger) *MistralProvider {
config.CheckAndSetDefaults()
requestTimeout := time.Second * time.Duration(config.NetworkConfig.DefaultRequestTimeoutInSeconds)
client := &fasthttp.Client{
ReadTimeout: requestTimeout,
WriteTimeout: requestTimeout,
MaxConnsPerHost: config.NetworkConfig.MaxConnsPerHost,
MaxIdleConnDuration: 30 * time.Second,
MaxConnWaitTimeout: requestTimeout,
MaxConnDuration: time.Second * time.Duration(schemas.DefaultMaxConnDurationInSeconds),
ConnPoolStrategy: fasthttp.FIFO,
}
// Pre-warm response pools
// for range config.ConcurrencyAndBufferSize.Concurrency {
// mistralResponsePool.Put(&schemas.BifrostResponse{})
// }
// Configure proxy and retry policy
client = providerUtils.ConfigureProxy(client, config.ProxyConfig, logger)
client = providerUtils.ConfigureDialer(client)
client = providerUtils.ConfigureTLS(client, config.NetworkConfig, logger)
streamingClient := providerUtils.BuildStreamingClient(client)
// Set default BaseURL if not provided
if config.NetworkConfig.BaseURL == "" {
config.NetworkConfig.BaseURL = "https://api.mistral.ai"
}
config.NetworkConfig.BaseURL = strings.TrimRight(config.NetworkConfig.BaseURL, "/")
return &MistralProvider{
logger: logger,
client: client,
streamingClient: streamingClient,
networkConfig: config.NetworkConfig,
customProviderConfig: config.CustomProviderConfig,
sendBackRawRequest: config.SendBackRawRequest,
sendBackRawResponse: config.SendBackRawResponse,
}
}
// GetProviderKey returns the provider identifier for Mistral.
func (provider *MistralProvider) GetProviderKey() schemas.ModelProvider {
return providerUtils.GetProviderName(schemas.Mistral, provider.customProviderConfig)
}
// listModelsByKey performs a list models request for a single key.
// Returns the response and latency, or an error if the request fails.
func (provider *MistralProvider) listModelsByKey(ctx *schemas.BifrostContext, key schemas.Key, request *schemas.BifrostListModelsRequest) (*schemas.BifrostListModelsResponse, *schemas.BifrostError) {
// Create request
req := fasthttp.AcquireRequest()
resp := fasthttp.AcquireResponse()
defer fasthttp.ReleaseRequest(req)
defer fasthttp.ReleaseResponse(resp)
// Set any extra headers from network config
providerUtils.SetExtraHeaders(ctx, req, provider.networkConfig.ExtraHeaders, nil)
req.SetRequestURI(provider.networkConfig.BaseURL + providerUtils.GetPathFromContext(ctx, "/v1/models"))
req.Header.SetMethod(http.MethodGet)
req.Header.SetContentType("application/json")
if key.Value.GetValue() != "" {
req.Header.Set("Authorization", "Bearer "+key.Value.GetValue())
}
// Make request
latency, bifrostErr, wait := providerUtils.MakeRequestWithContext(ctx, provider.client, req, resp)
defer wait()
if bifrostErr != nil {
return nil, bifrostErr
}
// Handle error response
if resp.StatusCode() != fasthttp.StatusOK {
bifrostErr := ParseMistralError(resp)
return nil, bifrostErr
}
// Copy response body before releasing
responseBody := append([]byte(nil), resp.Body()...)
// Parse Mistral's response
var mistralResponse MistralListModelsResponse
rawRequest, rawResponse, bifrostErr := providerUtils.HandleProviderResponse(responseBody, &mistralResponse, nil, providerUtils.ShouldSendBackRawRequest(ctx, provider.sendBackRawRequest), providerUtils.ShouldSendBackRawResponse(ctx, provider.sendBackRawResponse))
if bifrostErr != nil {
return nil, bifrostErr
}
// Create final response
response := mistralResponse.ToBifrostListModelsResponse(key.Models, key.BlacklistedModels, key.Aliases, request.Unfiltered)
response.ExtraFields.Latency = latency.Milliseconds()
// Set raw request if enabled
if providerUtils.ShouldSendBackRawRequest(ctx, provider.sendBackRawRequest) {
response.ExtraFields.RawRequest = rawRequest
}
// Set raw response if enabled
if providerUtils.ShouldSendBackRawResponse(ctx, provider.sendBackRawResponse) {
response.ExtraFields.RawResponse = rawResponse
}
return response, nil
}
// ListModels performs a list models request to Mistral's API.
// Requests are made concurrently for improved performance.
func (provider *MistralProvider) ListModels(ctx *schemas.BifrostContext, keys []schemas.Key, request *schemas.BifrostListModelsRequest) (*schemas.BifrostListModelsResponse, *schemas.BifrostError) {
return providerUtils.HandleMultipleListModelsRequests(
ctx,
keys,
request,
provider.listModelsByKey,
)
}
// TextCompletion is not supported by the Mistral provider.
func (provider *MistralProvider) TextCompletion(ctx *schemas.BifrostContext, key schemas.Key, request *schemas.BifrostTextCompletionRequest) (*schemas.BifrostTextCompletionResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.TextCompletionRequest, provider.GetProviderKey())
}
// TextCompletionStream performs a streaming text completion request to Mistral's API.
// It formats the request, sends it to Mistral, and processes the response.
// Returns a channel of BifrostStreamChunk objects or an error if the request fails.
func (provider *MistralProvider) TextCompletionStream(ctx *schemas.BifrostContext, postHookRunner schemas.PostHookRunner, postHookSpanFinalizer func(context.Context), key schemas.Key, request *schemas.BifrostTextCompletionRequest) (chan *schemas.BifrostStreamChunk, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.TextCompletionStreamRequest, provider.GetProviderKey())
}
// normalizeChatRequestForConversion returns the request unchanged for the stock Mistral
// provider. For custom aliases (e.g. a provider registered as "custom-mistral" with
// BaseProviderType=Mistral), it returns a shallow copy with Provider set to schemas.Mistral
// so the shared OpenAI converter applies Mistral-specific compatibility (max_completion_tokens
// → max_tokens, tool_choice struct → "any"). The caller's request is never mutated.
func (provider *MistralProvider) normalizeChatRequestForConversion(request *schemas.BifrostChatRequest) *schemas.BifrostChatRequest {
if request == nil || provider.customProviderConfig == nil || request.Provider == schemas.Mistral {
return request
}
normalized := *request
normalized.Provider = schemas.Mistral
return &normalized
}
// ChatCompletion performs a chat completion request to the Mistral API.
func (provider *MistralProvider) ChatCompletion(ctx *schemas.BifrostContext, key schemas.Key, request *schemas.BifrostChatRequest) (*schemas.BifrostChatResponse, *schemas.BifrostError) {
return openai.HandleOpenAIChatCompletionRequest(
ctx,
provider.client,
provider.networkConfig.BaseURL+providerUtils.GetPathFromContext(ctx, "/v1/chat/completions"),
provider.normalizeChatRequestForConversion(request),
key,
provider.networkConfig.ExtraHeaders,
providerUtils.ShouldSendBackRawRequest(ctx, provider.sendBackRawRequest),
providerUtils.ShouldSendBackRawResponse(ctx, provider.sendBackRawResponse),
provider.GetProviderKey(),
nil,
ParseMistralError,
provider.logger,
)
}
// ChatCompletionStream performs a streaming chat completion request to the Mistral API.
// It supports real-time streaming of responses using Server-Sent Events (SSE).
// Uses Mistral's OpenAI-compatible streaming format.
// Returns a channel containing BifrostStreamChunk objects representing the stream or an error if the request fails.
func (provider *MistralProvider) ChatCompletionStream(ctx *schemas.BifrostContext, postHookRunner schemas.PostHookRunner, postHookSpanFinalizer func(context.Context), key schemas.Key, request *schemas.BifrostChatRequest) (chan *schemas.BifrostStreamChunk, *schemas.BifrostError) {
var authHeader map[string]string
if key.Value.GetValue() != "" {
authHeader = map[string]string{"Authorization": "Bearer " + key.Value.GetValue()}
}
// Use shared OpenAI-compatible streaming logic
return openai.HandleOpenAIChatCompletionStreaming(
ctx,
provider.streamingClient,
provider.networkConfig.BaseURL+"/v1/chat/completions",
provider.normalizeChatRequestForConversion(request),
authHeader,
provider.networkConfig.ExtraHeaders,
providerUtils.ShouldSendBackRawRequest(ctx, provider.sendBackRawRequest),
providerUtils.ShouldSendBackRawResponse(ctx, provider.sendBackRawResponse),
provider.GetProviderKey(),
postHookRunner,
nil,
nil,
ParseMistralError,
nil,
nil,
provider.logger,
postHookSpanFinalizer,
)
}
// Responses performs a responses request to the Mistral API.
func (provider *MistralProvider) Responses(ctx *schemas.BifrostContext, key schemas.Key, request *schemas.BifrostResponsesRequest) (*schemas.BifrostResponsesResponse, *schemas.BifrostError) {
chatResponse, err := provider.ChatCompletion(ctx, key, request.ToChatRequest())
if err != nil {
return nil, err
}
response := chatResponse.ToBifrostResponsesResponse()
return response, nil
}
// ResponsesStream performs a streaming responses request to the Mistral API.
func (provider *MistralProvider) ResponsesStream(ctx *schemas.BifrostContext, postHookRunner schemas.PostHookRunner, postHookSpanFinalizer func(context.Context), key schemas.Key, request *schemas.BifrostResponsesRequest) (chan *schemas.BifrostStreamChunk, *schemas.BifrostError) {
ctx.SetValue(schemas.BifrostContextKeyIsResponsesToChatCompletionFallback, true)
return provider.ChatCompletionStream(
ctx,
postHookRunner,
postHookSpanFinalizer,
key,
request.ToChatRequest(),
)
}
// Embedding generates embeddings for the given input text(s) using the Mistral API.
// Supports Mistral's embedding models and returns a BifrostResponse containing the embedding(s).
func (provider *MistralProvider) Embedding(ctx *schemas.BifrostContext, key schemas.Key, request *schemas.BifrostEmbeddingRequest) (*schemas.BifrostEmbeddingResponse, *schemas.BifrostError) {
// Use the shared embedding request handler
return openai.HandleOpenAIEmbeddingRequest(
ctx,
provider.client,
provider.networkConfig.BaseURL+providerUtils.GetPathFromContext(ctx, "/v1/embeddings"),
request,
key,
provider.networkConfig.ExtraHeaders,
provider.GetProviderKey(),
providerUtils.ShouldSendBackRawRequest(ctx, provider.sendBackRawRequest),
providerUtils.ShouldSendBackRawResponse(ctx, provider.sendBackRawResponse),
nil,
provider.logger,
)
}
// Speech is not supported by the Mistral provider.
func (provider *MistralProvider) Speech(ctx *schemas.BifrostContext, key schemas.Key, request *schemas.BifrostSpeechRequest) (*schemas.BifrostSpeechResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.SpeechRequest, provider.GetProviderKey())
}
// Rerank is not supported by the Mistral provider.
func (provider *MistralProvider) Rerank(ctx *schemas.BifrostContext, key schemas.Key, request *schemas.BifrostRerankRequest) (*schemas.BifrostRerankResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.RerankRequest, provider.GetProviderKey())
}
// OCR performs an OCR request to the Mistral API.
// It sends a JSON request to Mistral's OCR endpoint and returns the extracted content.
func (provider *MistralProvider) OCR(ctx *schemas.BifrostContext, key schemas.Key, request *schemas.BifrostOCRRequest) (*schemas.BifrostOCRResponse, *schemas.BifrostError) {
// Convert Bifrost request to Mistral format
mistralReq := ToMistralOCRRequest(request)
if mistralReq == nil {
return nil, providerUtils.NewBifrostOperationError("ocr request input is not provided", nil)
}
// Marshal request body
requestBody, err := sonic.Marshal(mistralReq)
if err != nil {
return nil, providerUtils.NewBifrostOperationError(schemas.ErrProviderRequestMarshal, err)
}
// Merge extra params into JSON payload
if len(mistralReq.ExtraParams) > 0 {
requestBody, err = providerUtils.MergeExtraParamsIntoJSON(requestBody, mistralReq.ExtraParams)
if err != nil {
return nil, providerUtils.NewBifrostOperationError(schemas.ErrProviderRequestMarshal, err)
}
}
// Create HTTP request
req := fasthttp.AcquireRequest()
resp := fasthttp.AcquireResponse()
defer fasthttp.ReleaseRequest(req)
defer fasthttp.ReleaseResponse(resp)
// Set extra headers from network config
providerUtils.SetExtraHeaders(ctx, req, provider.networkConfig.ExtraHeaders, nil)
req.SetRequestURI(provider.networkConfig.BaseURL + providerUtils.GetPathFromContext(ctx, "/v1/ocr"))
req.Header.SetMethod(http.MethodPost)
req.Header.SetContentType("application/json")
if key.Value.GetValue() != "" {
req.Header.Set("Authorization", "Bearer "+key.Value.GetValue())
}
req.SetBody(requestBody)
// Set raw request if enabled
if providerUtils.ShouldSendBackRawRequest(ctx, provider.sendBackRawRequest) {
request.RawRequestBody = requestBody
}
// Make request
latency, bifrostErr, wait := providerUtils.MakeRequestWithContext(ctx, provider.client, req, resp)
defer wait()
if bifrostErr != nil {
return nil, bifrostErr
}
// Handle error response
if resp.StatusCode() != fasthttp.StatusOK {
return nil, ParseMistralError(resp)
}
responseBody, err := providerUtils.CheckAndDecodeBody(resp)
if err != nil {
return nil, providerUtils.NewBifrostOperationError(schemas.ErrProviderResponseDecode, err)
}
// Check for empty response
trimmed := strings.TrimSpace(string(responseBody))
if len(trimmed) == 0 {
return nil, &schemas.BifrostError{
IsBifrostError: true,
Error: &schemas.ErrorField{
Message: schemas.ErrProviderResponseEmpty,
},
}
}
copiedResponseBody := append([]byte(nil), responseBody...)
// Parse Mistral's OCR response
var mistralResponse MistralOCRResponse
if err := sonic.Unmarshal(copiedResponseBody, &mistralResponse); err != nil {
if providerUtils.IsHTMLResponse(resp, copiedResponseBody) {
return nil, &schemas.BifrostError{
IsBifrostError: false,
Error: &schemas.ErrorField{
Message: schemas.ErrProviderResponseHTML,
Error: errors.New(string(copiedResponseBody)),
},
}
}
return nil, providerUtils.NewBifrostOperationError(schemas.ErrProviderResponseUnmarshal, err)
}
// Convert to Bifrost format
response := mistralResponse.ToBifrostOCRResponse()
if response == nil {
return nil, providerUtils.NewBifrostOperationError("failed to convert ocr response", nil)
}
// Set extra fields
response.ExtraFields.Latency = latency.Milliseconds()
// Set raw response if enabled
if providerUtils.ShouldSendBackRawResponse(ctx, provider.sendBackRawResponse) {
var rawResponse interface{}
if err := sonic.Unmarshal(copiedResponseBody, &rawResponse); err == nil {
response.ExtraFields.RawResponse = rawResponse
}
}
return response, nil
}
// SpeechStream is not supported by the Mistral provider.
func (provider *MistralProvider) SpeechStream(ctx *schemas.BifrostContext, postHookRunner schemas.PostHookRunner, postHookSpanFinalizer func(context.Context), key schemas.Key, request *schemas.BifrostSpeechRequest) (chan *schemas.BifrostStreamChunk, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.SpeechStreamRequest, provider.GetProviderKey())
}
// Transcription performs an audio transcription request to the Mistral API.
// It creates a multipart form with the audio file and sends it to Mistral's transcription endpoint.
// Returns the transcribed text and metadata, or an error if the request fails.
func (provider *MistralProvider) Transcription(ctx *schemas.BifrostContext, key schemas.Key, request *schemas.BifrostTranscriptionRequest) (*schemas.BifrostTranscriptionResponse, *schemas.BifrostError) {
// Convert Bifrost request to Mistral format
mistralReq := ToMistralTranscriptionRequest(request)
if mistralReq == nil {
return nil, providerUtils.NewBifrostOperationError("transcription input is not provided", nil)
}
// Create multipart form body
body, contentType, bifrostErr := createMistralTranscriptionMultipartBody(mistralReq, provider.GetProviderKey())
if bifrostErr != nil {
return nil, bifrostErr
}
// Create HTTP request
req := fasthttp.AcquireRequest()
resp := fasthttp.AcquireResponse()
defer fasthttp.ReleaseRequest(req)
defer fasthttp.ReleaseResponse(resp)
// Set extra headers from network config
providerUtils.SetExtraHeaders(ctx, req, provider.networkConfig.ExtraHeaders, nil)
req.SetRequestURI(provider.networkConfig.BaseURL + providerUtils.GetPathFromContext(ctx, "/v1/audio/transcriptions"))
req.Header.SetMethod(http.MethodPost)
req.Header.SetContentType(contentType)
if key.Value.GetValue() != "" {
req.Header.Set("Authorization", "Bearer "+key.Value.GetValue())
}
req.SetBody(body.Bytes())
// Make request
latency, bifrostErr, wait := providerUtils.MakeRequestWithContext(ctx, provider.client, req, resp)
defer wait()
if bifrostErr != nil {
return nil, bifrostErr
}
// Handle error response
if resp.StatusCode() != fasthttp.StatusOK {
return nil, ParseMistralError(resp)
}
responseBody, err := providerUtils.CheckAndDecodeBody(resp)
if err != nil {
return nil, providerUtils.NewBifrostOperationError(schemas.ErrProviderResponseDecode, err)
}
// Check for empty response
trimmed := strings.TrimSpace(string(responseBody))
if len(trimmed) == 0 {
return nil, &schemas.BifrostError{
IsBifrostError: true,
Error: &schemas.ErrorField{
Message: schemas.ErrProviderResponseEmpty,
},
}
}
copiedResponseBody := append([]byte(nil), responseBody...)
// Parse Mistral's transcription response
var mistralResponse MistralTranscriptionResponse
if err := sonic.Unmarshal(copiedResponseBody, &mistralResponse); err != nil {
if providerUtils.IsHTMLResponse(resp, copiedResponseBody) {
return nil, &schemas.BifrostError{
IsBifrostError: false,
Error: &schemas.ErrorField{
Message: schemas.ErrProviderResponseHTML,
Error: errors.New(string(copiedResponseBody)),
},
}
}
return nil, providerUtils.NewBifrostOperationError(schemas.ErrProviderResponseUnmarshal, err)
}
// Convert to Bifrost format
response := mistralResponse.ToBifrostTranscriptionResponse()
if response == nil {
return nil, providerUtils.NewBifrostOperationError("failed to convert transcription response", nil)
}
// Set extra fields
response.ExtraFields.Latency = latency.Milliseconds()
// Set raw response if enabled
if providerUtils.ShouldSendBackRawResponse(ctx, provider.sendBackRawResponse) {
var rawResponse interface{}
if err := sonic.Unmarshal(copiedResponseBody, &rawResponse); err == nil {
response.ExtraFields.RawResponse = rawResponse
}
}
return response, nil
}
// TranscriptionStream performs a streaming transcription request to Mistral's API.
// It creates a multipart form with the audio file and streams transcription events.
// Returns a channel of BifrostStreamChunk objects containing transcription deltas.
func (provider *MistralProvider) TranscriptionStream(ctx *schemas.BifrostContext, postHookRunner schemas.PostHookRunner, postHookSpanFinalizer func(context.Context), key schemas.Key, request *schemas.BifrostTranscriptionRequest) (chan *schemas.BifrostStreamChunk, *schemas.BifrostError) {
providerName := provider.GetProviderKey()
// Convert Bifrost request to Mistral format
mistralReq := ToMistralTranscriptionRequest(request)
if mistralReq == nil {
return nil, providerUtils.NewBifrostOperationError("transcription input is not provided", nil)
}
mistralReq.Stream = schemas.Ptr(true)
// Create multipart form body with stream=true
body, contentType, bifrostErr := createMistralTranscriptionMultipartBody(mistralReq, providerName)
if bifrostErr != nil {
return nil, bifrostErr
}
// Prepare headers for streaming
headers := map[string]string{
"Content-Type": contentType,
"Accept": "text/event-stream",
"Cache-Control": "no-cache",
}
if key.Value.GetValue() != "" {
headers["Authorization"] = "Bearer " + key.Value.GetValue()
}
// Create HTTP request for streaming
req := fasthttp.AcquireRequest()
resp := fasthttp.AcquireResponse()
resp.StreamBody = true
defer fasthttp.ReleaseRequest(req)
// Set any extra headers from network config
providerUtils.SetExtraHeaders(ctx, req, provider.networkConfig.ExtraHeaders, nil)
req.Header.SetMethod(http.MethodPost)
req.SetRequestURI(provider.networkConfig.BaseURL + providerUtils.GetPathFromContext(ctx, "/v1/audio/transcriptions"))
// Set headers
for headerKey, value := range headers {
req.Header.Set(headerKey, value)
}
req.SetBody(body.Bytes())
// Make the request
err := provider.streamingClient.Do(req, resp)
if err != nil {
defer providerUtils.ReleaseStreamingResponse(resp)
if errors.Is(err, context.Canceled) {
return nil, &schemas.BifrostError{
IsBifrostError: false,
Error: &schemas.ErrorField{
Type: schemas.Ptr(schemas.RequestCancelled),
Message: schemas.ErrRequestCancelled,
Error: err,
},
}
}
if errors.Is(err, fasthttp.ErrTimeout) || errors.Is(err, context.DeadlineExceeded) {
return nil, providerUtils.NewBifrostTimeoutError(schemas.ErrProviderRequestTimedOut, err)
}
return nil, providerUtils.NewBifrostOperationError(schemas.ErrProviderDoRequest, err)
}
// Store provider response headers in context before status check so error responses also forward them
ctx.SetValue(schemas.BifrostContextKeyProviderResponseHeaders, providerUtils.ExtractProviderResponseHeaders(resp))
// Check for HTTP errors
if resp.StatusCode() != fasthttp.StatusOK {
defer providerUtils.ReleaseStreamingResponse(resp)
return nil, ParseMistralError(resp)
}
// Large payload streaming passthrough — pipe raw upstream SSE to client
if providerUtils.SetupStreamingPassthrough(ctx, resp) {
responseChan := make(chan *schemas.BifrostStreamChunk)
close(responseChan)
return responseChan, nil
}
// Create response channel
responseChan := make(chan *schemas.BifrostStreamChunk, schemas.DefaultStreamBufferSize)
providerUtils.SetStreamIdleTimeoutIfEmpty(ctx, provider.networkConfig.StreamIdleTimeoutInSeconds)
// Start streaming in a goroutine
go func() {
defer func() {
if ctx.Err() == context.Canceled {
providerUtils.HandleStreamCancellation(ctx, postHookRunner, responseChan, provider.logger, postHookSpanFinalizer)
} else if ctx.Err() == context.DeadlineExceeded {
providerUtils.HandleStreamTimeout(ctx, postHookRunner, responseChan, provider.logger, postHookSpanFinalizer)
}
close(responseChan)
}()
defer providerUtils.ReleaseStreamingResponse(resp)
// Decompress gzip-encoded streams transparently (no-op for non-gzip)
reader, releaseGzip := providerUtils.DecompressStreamBody(resp)
defer releaseGzip()
// Wrap reader with idle timeout to detect stalled streams.
reader, stopIdleTimeout := providerUtils.NewIdleTimeoutReader(reader, resp.BodyStream(), providerUtils.GetStreamIdleTimeout(ctx))
defer stopIdleTimeout()
// Setup cancellation handler to close the raw network stream on ctx cancellation,
// which immediately unblocks any in-progress read (including reads blocked inside a gzip decompression layer).
stopCancellation := providerUtils.SetupStreamCancellation(ctx, resp.BodyStream(), provider.logger)
defer stopCancellation()
defer providerUtils.EnsureStreamFinalizerCalled(ctx, postHookSpanFinalizer)
sseReader := providerUtils.GetSSEEventReader(ctx, reader)
chunkIndex := -1
startTime := time.Now()
lastChunkTime := startTime
for {
// If context was cancelled/timed out, let defer handle it
if ctx.Err() != nil {
return
}
eventType, eventDataBytes, readErr := sseReader.ReadEvent()
if readErr != nil {
if readErr != io.EOF {
// If context was cancelled/timed out, let defer handle it
if ctx.Err() != nil {
return
}
ctx.SetValue(schemas.BifrostContextKeyStreamEndIndicator, true)
provider.logger.Warn("Error reading stream: %v", readErr)
providerUtils.ProcessAndSendError(ctx, postHookRunner, readErr, responseChan, provider.logger, postHookSpanFinalizer)
}
break
}
currentEvent := eventType
currentData := string(eventDataBytes)
if currentEvent == "" || currentData == "" {
continue
}
chunkIndex++
provider.processTranscriptionStreamEvent(ctx, postHookRunner, currentEvent, currentData, request.Model, providerName, chunkIndex, startTime, &lastChunkTime, responseChan, postHookSpanFinalizer)
// Break on terminal stream indicator (covers both done events and error events
// that processTranscriptionStreamEvent signals via context).
if ended, _ := ctx.Value(schemas.BifrostContextKeyStreamEndIndicator).(bool); ended {
break
}
}
}()
return responseChan, nil
}
// processTranscriptionStreamEvent processes a single SSE event and sends it to the response channel.
func (provider *MistralProvider) processTranscriptionStreamEvent(
ctx *schemas.BifrostContext,
postHookRunner schemas.PostHookRunner,
eventType string,
jsonData string,
model string,
providerName schemas.ModelProvider,
chunkIndex int,
startTime time.Time,
lastChunkTime *time.Time,
responseChan chan *schemas.BifrostStreamChunk,
postHookSpanFinalizer func(context.Context),
) {
// Skip empty data
if strings.TrimSpace(jsonData) == "" {
return
}
// Quick check for error field (allocation-free using sonic.GetFromString)
if errorNode, _ := sonic.GetFromString(jsonData, "error"); errorNode.Exists() {
// Only unmarshal when we know there's an error
var bifrostErr schemas.BifrostError
if err := sonic.UnmarshalString(jsonData, &bifrostErr); err == nil {
if bifrostErr.Error != nil && bifrostErr.Error.Message != "" {
ctx.SetValue(schemas.BifrostContextKeyStreamEndIndicator, true)
providerUtils.ProcessAndSendBifrostError(ctx, postHookRunner, &bifrostErr, responseChan, provider.logger, postHookSpanFinalizer)
return
}
}
}
// Parse the event data
var eventData MistralTranscriptionStreamData
if err := sonic.UnmarshalString(jsonData, &eventData); err != nil {
provider.logger.Warn("Failed to parse stream event data: %v", err)
return
}
// Create the stream event
streamEvent := &MistralTranscriptionStreamEvent{
Event: eventType,
Data: &eventData,
}
// Convert to Bifrost format
response := streamEvent.ToBifrostTranscriptionStreamResponse()
if response == nil {
return
}
// Set extra fields
response.ExtraFields = schemas.BifrostResponseExtraFields{
ChunkIndex: chunkIndex,
Latency: time.Since(*lastChunkTime).Milliseconds(),
}
*lastChunkTime = time.Now()
if providerUtils.ShouldSendBackRawResponse(ctx, provider.sendBackRawResponse) {
response.ExtraFields.RawResponse = jsonData
}
// Check for done event (handle both "transcription.done" and "transcript.text.done")
if MistralTranscriptionStreamEventType(eventType) == MistralTranscriptionStreamEventDone || eventType == "transcript.text.done" {
response.ExtraFields.Latency = time.Since(startTime).Milliseconds()
ctx.SetValue(schemas.BifrostContextKeyStreamEndIndicator, true)
// Ensure response type is set to Done
response.Type = schemas.TranscriptionStreamResponseTypeDone
}
providerUtils.ProcessAndSendResponse(ctx, postHookRunner, providerUtils.GetBifrostResponseForStreamResponse(nil, nil, nil, nil, response, nil), responseChan, postHookSpanFinalizer)
}
// BatchCreate is not supported by Mistral provider.
func (provider *MistralProvider) BatchCreate(_ *schemas.BifrostContext, _ schemas.Key, _ *schemas.BifrostBatchCreateRequest) (*schemas.BifrostBatchCreateResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.BatchCreateRequest, provider.GetProviderKey())
}
// BatchList is not supported by Mistral provider.
func (provider *MistralProvider) BatchList(_ *schemas.BifrostContext, _ []schemas.Key, _ *schemas.BifrostBatchListRequest) (*schemas.BifrostBatchListResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.BatchListRequest, provider.GetProviderKey())
}
// BatchRetrieve is not supported by Mistral provider.
func (provider *MistralProvider) BatchRetrieve(_ *schemas.BifrostContext, _ []schemas.Key, _ *schemas.BifrostBatchRetrieveRequest) (*schemas.BifrostBatchRetrieveResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.BatchRetrieveRequest, provider.GetProviderKey())
}
// BatchCancel is not supported by Mistral provider.
func (provider *MistralProvider) BatchCancel(_ *schemas.BifrostContext, _ []schemas.Key, _ *schemas.BifrostBatchCancelRequest) (*schemas.BifrostBatchCancelResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.BatchCancelRequest, provider.GetProviderKey())
}
// BatchDelete is not supported by Mistral provider.
func (provider *MistralProvider) BatchDelete(_ *schemas.BifrostContext, _ []schemas.Key, _ *schemas.BifrostBatchDeleteRequest) (*schemas.BifrostBatchDeleteResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.BatchDeleteRequest, provider.GetProviderKey())
}
// BatchResults is not supported by Mistral provider.
func (provider *MistralProvider) BatchResults(_ *schemas.BifrostContext, _ []schemas.Key, _ *schemas.BifrostBatchResultsRequest) (*schemas.BifrostBatchResultsResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.BatchResultsRequest, provider.GetProviderKey())
}
// FileUpload is not supported by Mistral provider.
func (provider *MistralProvider) FileUpload(_ *schemas.BifrostContext, _ schemas.Key, _ *schemas.BifrostFileUploadRequest) (*schemas.BifrostFileUploadResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.FileUploadRequest, provider.GetProviderKey())
}
// FileList is not supported by Mistral provider.
func (provider *MistralProvider) FileList(_ *schemas.BifrostContext, _ []schemas.Key, _ *schemas.BifrostFileListRequest) (*schemas.BifrostFileListResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.FileListRequest, provider.GetProviderKey())
}
// FileRetrieve is not supported by Mistral provider.
func (provider *MistralProvider) FileRetrieve(_ *schemas.BifrostContext, _ []schemas.Key, _ *schemas.BifrostFileRetrieveRequest) (*schemas.BifrostFileRetrieveResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.FileRetrieveRequest, provider.GetProviderKey())
}
// FileDelete is not supported by Mistral provider.
func (provider *MistralProvider) FileDelete(_ *schemas.BifrostContext, _ []schemas.Key, _ *schemas.BifrostFileDeleteRequest) (*schemas.BifrostFileDeleteResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.FileDeleteRequest, provider.GetProviderKey())
}
// FileContent is not supported by Mistral provider.
func (provider *MistralProvider) FileContent(_ *schemas.BifrostContext, _ []schemas.Key, _ *schemas.BifrostFileContentRequest) (*schemas.BifrostFileContentResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.FileContentRequest, provider.GetProviderKey())
}
// CountTokens is not supported by the Mistral provider.
func (provider *MistralProvider) CountTokens(_ *schemas.BifrostContext, _ schemas.Key, _ *schemas.BifrostResponsesRequest) (*schemas.BifrostCountTokensResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.CountTokensRequest, provider.GetProviderKey())
}
// ImageGeneration is not supported by the Mistral provider.
func (provider *MistralProvider) ImageGeneration(ctx *schemas.BifrostContext, key schemas.Key, request *schemas.BifrostImageGenerationRequest) (*schemas.BifrostImageGenerationResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.ImageGenerationRequest, provider.GetProviderKey())
}
// ImageGenerationStream is not supported by the Mistral provider.
func (provider *MistralProvider) ImageGenerationStream(ctx *schemas.BifrostContext, postHookRunner schemas.PostHookRunner, postHookSpanFinalizer func(context.Context), key schemas.Key, request *schemas.BifrostImageGenerationRequest) (chan *schemas.BifrostStreamChunk, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.ImageGenerationStreamRequest, provider.GetProviderKey())
}
// ImageEdit is not supported by the Mistral provider.
func (provider *MistralProvider) ImageEdit(ctx *schemas.BifrostContext, key schemas.Key, request *schemas.BifrostImageEditRequest) (*schemas.BifrostImageGenerationResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.ImageEditRequest, provider.GetProviderKey())
}
// ImageEditStream is not supported by the Mistral provider.
func (provider *MistralProvider) ImageEditStream(ctx *schemas.BifrostContext, postHookRunner schemas.PostHookRunner, postHookSpanFinalizer func(context.Context), key schemas.Key, request *schemas.BifrostImageEditRequest) (chan *schemas.BifrostStreamChunk, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.ImageEditStreamRequest, provider.GetProviderKey())
}
// ImageVariation is not supported by the Mistral provider.
func (provider *MistralProvider) ImageVariation(ctx *schemas.BifrostContext, key schemas.Key, request *schemas.BifrostImageVariationRequest) (*schemas.BifrostImageGenerationResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.ImageVariationRequest, provider.GetProviderKey())
}
// VideoGeneration is not supported by the Mistral provider.
func (provider *MistralProvider) VideoGeneration(_ *schemas.BifrostContext, _ schemas.Key, _ *schemas.BifrostVideoGenerationRequest) (*schemas.BifrostVideoGenerationResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.VideoGenerationRequest, provider.GetProviderKey())
}
// VideoRetrieve is not supported by the Mistral provider.
func (provider *MistralProvider) VideoRetrieve(_ *schemas.BifrostContext, _ schemas.Key, _ *schemas.BifrostVideoRetrieveRequest) (*schemas.BifrostVideoGenerationResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.VideoRetrieveRequest, provider.GetProviderKey())
}
// VideoDownload is not supported by the Mistral provider.
func (provider *MistralProvider) VideoDownload(_ *schemas.BifrostContext, _ schemas.Key, _ *schemas.BifrostVideoDownloadRequest) (*schemas.BifrostVideoDownloadResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.VideoDownloadRequest, provider.GetProviderKey())
}
// VideoDelete is not supported by the Mistral provider.
func (provider *MistralProvider) VideoDelete(_ *schemas.BifrostContext, _ schemas.Key, _ *schemas.BifrostVideoDeleteRequest) (*schemas.BifrostVideoDeleteResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.VideoDeleteRequest, provider.GetProviderKey())
}
// VideoList is not supported by the Mistral provider.
func (provider *MistralProvider) VideoList(_ *schemas.BifrostContext, _ schemas.Key, _ *schemas.BifrostVideoListRequest) (*schemas.BifrostVideoListResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.VideoListRequest, provider.GetProviderKey())
}
// VideoRemix is not supported by the Mistral provider.
func (provider *MistralProvider) VideoRemix(_ *schemas.BifrostContext, _ schemas.Key, _ *schemas.BifrostVideoRemixRequest) (*schemas.BifrostVideoGenerationResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.VideoRemixRequest, provider.GetProviderKey())
}
// ContainerCreate is not supported by the Mistral provider.
func (provider *MistralProvider) ContainerCreate(_ *schemas.BifrostContext, _ schemas.Key, _ *schemas.BifrostContainerCreateRequest) (*schemas.BifrostContainerCreateResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.ContainerCreateRequest, provider.GetProviderKey())
}
// ContainerList is not supported by the Mistral provider.
func (provider *MistralProvider) ContainerList(_ *schemas.BifrostContext, _ []schemas.Key, _ *schemas.BifrostContainerListRequest) (*schemas.BifrostContainerListResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.ContainerListRequest, provider.GetProviderKey())
}
// ContainerRetrieve is not supported by the Mistral provider.
func (provider *MistralProvider) ContainerRetrieve(_ *schemas.BifrostContext, _ []schemas.Key, _ *schemas.BifrostContainerRetrieveRequest) (*schemas.BifrostContainerRetrieveResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.ContainerRetrieveRequest, provider.GetProviderKey())
}
// ContainerDelete is not supported by the Mistral provider.
func (provider *MistralProvider) ContainerDelete(_ *schemas.BifrostContext, _ []schemas.Key, _ *schemas.BifrostContainerDeleteRequest) (*schemas.BifrostContainerDeleteResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.ContainerDeleteRequest, provider.GetProviderKey())
}
// ContainerFileCreate is not supported by the Mistral provider.
func (provider *MistralProvider) ContainerFileCreate(_ *schemas.BifrostContext, _ schemas.Key, _ *schemas.BifrostContainerFileCreateRequest) (*schemas.BifrostContainerFileCreateResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.ContainerFileCreateRequest, provider.GetProviderKey())
}
// ContainerFileList is not supported by the Mistral provider.
func (provider *MistralProvider) ContainerFileList(_ *schemas.BifrostContext, _ []schemas.Key, _ *schemas.BifrostContainerFileListRequest) (*schemas.BifrostContainerFileListResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.ContainerFileListRequest, provider.GetProviderKey())
}
// ContainerFileRetrieve is not supported by the Mistral provider.
func (provider *MistralProvider) ContainerFileRetrieve(_ *schemas.BifrostContext, _ []schemas.Key, _ *schemas.BifrostContainerFileRetrieveRequest) (*schemas.BifrostContainerFileRetrieveResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.ContainerFileRetrieveRequest, provider.GetProviderKey())
}
// ContainerFileContent is not supported by the Mistral provider.
func (provider *MistralProvider) ContainerFileContent(_ *schemas.BifrostContext, _ []schemas.Key, _ *schemas.BifrostContainerFileContentRequest) (*schemas.BifrostContainerFileContentResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.ContainerFileContentRequest, provider.GetProviderKey())
}
// ContainerFileDelete is not supported by the Mistral provider.
func (provider *MistralProvider) ContainerFileDelete(_ *schemas.BifrostContext, _ []schemas.Key, _ *schemas.BifrostContainerFileDeleteRequest) (*schemas.BifrostContainerFileDeleteResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.ContainerFileDeleteRequest, provider.GetProviderKey())
}
// Passthrough is not supported by the Mistral provider.
func (provider *MistralProvider) Passthrough(_ *schemas.BifrostContext, _ schemas.Key, _ *schemas.BifrostPassthroughRequest) (*schemas.BifrostPassthroughResponse, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.PassthroughRequest, provider.GetProviderKey())
}
func (provider *MistralProvider) PassthroughStream(_ *schemas.BifrostContext, _ schemas.PostHookRunner, _ func(context.Context), _ schemas.Key, _ *schemas.BifrostPassthroughRequest) (chan *schemas.BifrostStreamChunk, *schemas.BifrostError) {
return nil, providerUtils.NewUnsupportedOperationError(schemas.PassthroughStreamRequest, provider.GetProviderKey())
}