feat: add custom http headers to openai related api backends (#1174)

* feat: add custom http headers to openai related api backends

Signed-off-by: Aris Boutselis <arisboutselis08@gmail.com>

* ci: add custom headers test

Signed-off-by: Aris Boutselis <arisboutselis08@gmail.com>

* add error handling

Signed-off-by: Aris Boutselis <arisboutselis08@gmail.com>

* chore(deps): update docker/setup-buildx-action digest to 4fd8129 (#1173)

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Signed-off-by: Aris Boutselis <arisboutselis08@gmail.com>

* fix(deps): update module buf.build/gen/go/k8sgpt-ai/k8sgpt/grpc-ecosystem/gateway/v2 to v2.20.0-20240406062209-1cc152efbf5c.1 (#1147)

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Signed-off-by: Aris Boutselis <arisboutselis08@gmail.com>

* chore(deps): update anchore/sbom-action action to v0.16.0 (#1146)

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Alex Jones <alexsimonjones@gmail.com>
Signed-off-by: Aris Boutselis <arisboutselis08@gmail.com>

* Update README.md

Signed-off-by: Aris Boutselis <arisboutselis08@gmail.com>

---------

Signed-off-by: Aris Boutselis <arisboutselis08@gmail.com>
Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Alex Jones <alexsimonjones@gmail.com>

README.md

@@ -299,6 +299,12 @@ _Analysis with serve mode_
 ```
 grpcurl -plaintext -d '{"namespace": "k8sgpt", "explain": false}' localhost:8080 schema.v1.ServerService/Analyze
 ```
+
+_Analysis with custom headers_
+
+```
+k8sgpt analyze --explain --custom-headers CustomHeaderKey:CustomHeaderValue
+```
 </details>
 
 ## LLM AI Backends

cmd/analyze/analyze.go

@@ -38,6 +38,7 @@ var (
 	withDoc         bool
 	interactiveMode bool
 	customAnalysis  bool
+	customHeaders   []string
 )
 
 // AnalyzeCmd represents the problems command
@@ -59,6 +60,7 @@ var AnalyzeCmd = &cobra.Command{
 			maxConcurrency,
 			withDoc,
 			interactiveMode,
+			customHeaders,
 		)
 
 		if err != nil {
@@ -138,5 +140,6 @@ func init() {
 	AnalyzeCmd.Flags().BoolVarP(&interactiveMode, "interactive", "i", false, "Enable interactive mode that allows further conversation with LLM about the problem. Works only with --explain flag")
 	// custom analysis flag
 	AnalyzeCmd.Flags().BoolVarP(&customAnalysis, "custom-analysis", "z", false, "Enable custom analyzers")
-
+	// add custom headers flag
+	AnalyzeCmd.Flags().StringSliceVarP(&customHeaders, "custom-headers", "r", []string{}, "Custom Headers, <key>:<value> (e.g CustomHeaderKey:CustomHeaderValue AnotherHeader:AnotherValue)")
 }

pkg/ai/iai.go

@@ -15,6 +15,7 @@ package ai
 
 import (
 	"context"
+	"net/http"
 )
 
 var (
@@ -83,6 +84,7 @@ type IAIConfig interface {
 	GetProviderId() string
 	GetCompartmentId() string
 	GetOrganizationId() string
+	GetCustomHeaders() []http.Header
 }
 
 func NewClient(provider string) IAI {
@@ -117,6 +119,7 @@ type AIProvider struct {
 	TopK           int32         `mapstructure:"topk" yaml:"topk,omitempty"`
 	MaxTokens      int           `mapstructure:"maxtokens" yaml:"maxtokens,omitempty"`
 	OrganizationId string        `mapstructure:"organizationid" yaml:"organizationid,omitempty"`
+	CustomHeaders  []http.Header `mapstructure:"customHeaders"`
 }
 
 func (p *AIProvider) GetBaseURL() string {
@@ -174,6 +177,10 @@ func (p *AIProvider) GetOrganizationId() string {
 	return p.OrganizationId
 }
 
+func (p *AIProvider) GetCustomHeaders() []http.Header {
+	return p.CustomHeaders
+}
+
 var passwordlessProviders = []string{"localai", "ollama", "amazonsagemaker", "amazonbedrock", "googlevertexai", "oci", "watsonxai"}
 
 func NeedPassword(backend string) bool {

pkg/ai/openai.go

@@ -52,24 +52,27 @@ func (c *OpenAIClient) Configure(config IAIConfig) error {
 		defaultConfig.BaseURL = baseURL
 	}
 
+	transport := &http.Transport{}
 	if proxyEndpoint != "" {
 		proxyUrl, err := url.Parse(proxyEndpoint)
 		if err != nil {
 			return err
 		}
-		transport := &http.Transport{
+		transport.Proxy = http.ProxyURL(proxyUrl)
-			Proxy: http.ProxyURL(proxyUrl),
-		}
-
-		defaultConfig.HTTPClient = &http.Client{
-			Transport: transport,
-		}
 	}
 
 	if orgId != "" {
 		defaultConfig.OrgID = orgId
 	}
 
+	customHeaders := config.GetCustomHeaders()
+	defaultConfig.HTTPClient = &http.Client{
+		Transport: &OpenAIHeaderTransport{
+			Origin:  transport,
+			Headers: customHeaders,
+		},
+	}
+
 	client := openai.NewClientWithConfig(defaultConfig)
 	if client == nil {
 		return errors.New("error creating OpenAI client")
@@ -106,3 +109,25 @@ func (c *OpenAIClient) GetCompletion(ctx context.Context, prompt string) (string
 func (c *OpenAIClient) GetName() string {
 	return openAIClientName
 }
+
+// OpenAIHeaderTransport is an http.RoundTripper that adds the given headers to each request.
+type OpenAIHeaderTransport struct {
+	Origin  http.RoundTripper
+	Headers []http.Header
+}
+
+// RoundTrip implements the http.RoundTripper interface.
+func (t *OpenAIHeaderTransport) RoundTrip(req *http.Request) (*http.Response, error) {
+	// Clone the request to avoid modifying the original request
+	clonedReq := req.Clone(req.Context())
+	for _, header := range t.Headers {
+		for key, values := range header {
+			// Possible values per header:  RFC 2616
+			for _, value := range values {
+				clonedReq.Header.Add(key, value)
+			}
+		}
+	}
+
+	return t.Origin.RoundTrip(clonedReq)
+}

pkg/ai/openai_header_transport_test.go

@@ -0,0 +1,106 @@
+package ai
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+// Mock configuration
+type mockConfig struct {
+	baseURL string
+}
+
+func (m *mockConfig) GetPassword() string {
+	return ""
+}
+
+func (m *mockConfig) GetOrganizationId() string {
+	return ""
+}
+
+func (m *mockConfig) GetProxyEndpoint() string {
+	return ""
+}
+
+func (m *mockConfig) GetBaseURL() string {
+	return m.baseURL
+}
+
+func (m *mockConfig) GetCustomHeaders() []http.Header {
+	return []http.Header{
+		{"X-Custom-Header-1": []string{"Value1"}},
+		{"X-Custom-Header-2": []string{"Value2"}},
+		{"X-Custom-Header-2": []string{"Value3"}}, // Testing multiple values for the same header
+	}
+}
+
+func (m *mockConfig) GetModel() string {
+	return ""
+}
+
+func (m *mockConfig) GetTemperature() float32 {
+	return 0.0
+}
+
+func (m *mockConfig) GetTopP() float32 {
+	return 0.0
+}
+func (m *mockConfig) GetCompartmentId() string {
+	return ""
+}
+
+func (m *mockConfig) GetTopK() int32 {
+	return 0.0
+}
+
+func (m *mockConfig) GetMaxTokens() int {
+	return 0
+}
+
+func (m *mockConfig) GetEndpointName() string {
+	return ""
+}
+func (m *mockConfig) GetEngine() string {
+	return ""
+}
+
+func (m *mockConfig) GetProviderId() string {
+	return ""
+}
+
+func (m *mockConfig) GetProviderRegion() string {
+	return ""
+}
+
+func TestOpenAIClient_CustomHeaders(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		assert.Equal(t, "Value1", r.Header.Get("X-Custom-Header-1"))
+		assert.ElementsMatch(t, []string{"Value2", "Value3"}, r.Header["X-Custom-Header-2"])
+		w.WriteHeader(http.StatusOK)
+		// Mock response for openai completion
+		mockResponse := `{"choices": [{"message": {"content": "test"}}]}`
+		n, err := w.Write([]byte(mockResponse))
+		if err != nil {
+			t.Fatalf("error writing response: %v", err)
+		}
+		if n != len(mockResponse) {
+			t.Fatalf("expected to write %d bytes but wrote %d bytes", len(mockResponse), n)
+		}
+	}))
+	defer server.Close()
+
+	config := &mockConfig{baseURL: server.URL}
+
+	client := &OpenAIClient{}
+	err := client.Configure(config)
+	assert.NoError(t, err)
+
+	// Make a completion request to trigger the headers
+	ctx := context.Background()
+	_, err = client.GetCompletion(ctx, "foo prompt")
+	assert.NoError(t, err)
+}

pkg/analysis/analysis.go

@@ -79,6 +79,7 @@ func NewAnalysis(
 	maxConcurrency int,
 	withDoc bool,
 	interactiveMode bool,
+	httpHeaders []string,
 ) (*Analysis, error) {
 	// Get kubernetes client from viper.
 	kubecontext := viper.GetString("kubecontext")
@@ -146,6 +147,8 @@ func NewAnalysis(
 	}
 
 	aiClient := ai.NewClient(aiProvider.Name)
+	customHeaders := util.NewHeaders(httpHeaders)
+	aiProvider.CustomHeaders = customHeaders
 	if err := aiClient.Configure(&aiProvider); err != nil {
 		return nil, err
 	}

pkg/server/analyze.go

@@ -30,6 +30,7 @@ func (h *handler) Analyze(ctx context.Context, i *schemav1.AnalyzeRequest) (
 		int(i.MaxConcurrency),
 		false,      // Kubernetes Doc disabled in server mode
 		false,      // Interactive mode disabled in server mode
+		[]string{}, //TODO: add custom http headers in server mode
 	)
 	config.Context = ctx // Replace context for correct timeouts.
 	if err != nil {

pkg/util/util.go

@@ -21,6 +21,7 @@ import (
 	"encoding/hex"
 	"errors"
 	"fmt"
+	"net/http"
 	"os"
 	"regexp"
 	"strings"
@@ -261,3 +262,36 @@ func FetchLatestEvent(ctx context.Context, kubernetesClient *kubernetes.Client,
 	}
 	return latestEvent, nil
 }
+
+// NewHeaders parses a slice of strings in the format "key:value" into []http.Header
+// It handles headers with the same key by appending values
+func NewHeaders(customHeaders []string) []http.Header {
+	headers := make(map[string][]string)
+
+	for _, header := range customHeaders {
+		vals := strings.SplitN(header, ":", 2)
+		if len(vals) != 2 {
+			//TODO: Handle error instead of ignoring it
+			continue
+		}
+		key := strings.TrimSpace(vals[0])
+		value := strings.TrimSpace(vals[1])
+
+		if _, ok := headers[key]; !ok {
+			headers[key] = []string{}
+		}
+		headers[key] = append(headers[key], value)
+	}
+
+	// Convert map to []http.Header format
+	var result []http.Header
+	for key, values := range headers {
+		header := make(http.Header)
+		for _, value := range values {
+			header.Add(key, value)
+		}
+		result = append(result, header)
+	}
+
+	return result
+}