feat: AI Proxy Wasm Plugin Integration with GitHub Models #1304

plugins/wasm-go/extensions/ai-proxy/README.md

@@ -143,6 +143,10 @@ Groq 所对应的 `type` 为 `groq`。它并无特有的配置字段。
 
 360智脑所对应的 `type` 为 `ai360`。它并无特有的配置字段。
 
+#### GitHub模型
+
+GitHub模型所对应的 `type` 为 `github`。它并无特有的配置字段。
+
 #### Mistral
 
 Mistral 所对应的 `type` 为 `mistral`。它并无特有的配置字段。
@@ -1018,6 +1022,107 @@ provider:
 }
 ```
 
+### 使用 OpenAI 协议代理 GitHub 模型服务
+
+**配置信息**
+
+```yaml
+provider:
+  type: github
+  apiTokens:
+    - "YOUR_GITHUB_ACCESS_TOKEN"
+  modelMapping:
+    "gpt-4o": "gpt-4o"
+    "gpt-4": "Phi-3.5-MoE-instruct"
+    "gpt-3.5": "cohere-command-r-08-2024"
+    "text-embedding-3-large": "text-embedding-3-large"
+```
+
+**请求示例**
+
+```json
+{
+  "messages": [
+    {
+      "role": "system",
+      "content": "You are a helpful assistant."
+    },
+    {
+      "role": "user",
+      "content": "What is the capital of France?"
+    }
+  ],
+  "stream": true,
+  "temperature": 1.0,
+  "top_p": 1.0,
+  "max_tokens": 1000,
+  "model": "gpt-4o"
+}
+```
+
+**响应示例**
+```json
+{
+  "choices": [
+    {
+      "finish_reason": "stop",
+      "index": 0,
+      "logprobs": null,
+      "message": {
+        "content": "The capital of France is Paris.",
+        "role": "assistant"
+      }
+    }
+  ],
+  "created": 1728131051,
+  "id": "chatcmpl-AEy7PU2JImdsD1W6Jw8GigZSEnM2u",
+  "model": "gpt-4o-2024-08-06",
+  "object": "chat.completion",
+  "system_fingerprint": "fp_67802d9a6d",
+  "usage": {
+    "completion_tokens": 7,
+    "prompt_tokens": 24,
+    "total_tokens": 31
+  }
+}
+```
+
+**文本向量请求示例**
+
+```json
+{
+  "input": ["first phrase", "second phrase", "third phrase"],
+  "model": "text-embedding-3-large"
+}
+```
+
+响应示例：
+
+```json
+{
+  "object": "list",
+  "data": [
+    {
+      "object": "embedding",
+      "index": 0,
+      "embedding": [
+        -0.0012583479,
+        0.0020349282,
+        ...
+        0.012051377,
+        -0.0053306012,
+        0.0060688322
+      ]
+    }
+  ],
+  "model": "text-embedding-3-large",
+  "usage": {
+    "prompt_tokens": 6,
+    "total_tokens": 6
+  }
+}
+```
+
 ### 使用 OpenAI 协议代理360智脑服务
 
 **配置信息**
@@ -1026,7 +1131,7 @@ provider:
 provider:
   type: ai360
   apiTokens:
-    - "YOUR_MINIMAX_API_TOKEN"
+    - "YOUR_360_API_TOKEN"
   modelMapping:
     "gpt-4o": "360gpt-turbo-responsibility-8k"
     "gpt-4": "360gpt2-pro"

plugins/wasm-go/extensions/ai-proxy/provider/github.go

@@ -0,0 +1,112 @@
+package provider
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"github.com/higress-group/proxy-wasm-go-sdk/proxywasm"
+	"github.com/higress-group/proxy-wasm-go-sdk/proxywasm/types"
+
+	"github.com/alibaba/higress/plugins/wasm-go/extensions/ai-proxy/util"
+	"github.com/alibaba/higress/plugins/wasm-go/pkg/wrapper"
+)
+
+// githubProvider is the provider for GitHub OpenAI service.
+const (
+	githubDomain         = "models.inference.ai.azure.com"
+	githubCompletionPath = "/chat/completions"
+	githubEmbeddingPath  = "/embeddings"
+)
+
+type githubProviderInitializer struct {
+}
+
+type githubProvider struct {
+	config       ProviderConfig
+	contextCache *contextCache
+}
+
+func (m *githubProviderInitializer) ValidateConfig(config ProviderConfig) error {
+	if config.apiTokens == nil || len(config.apiTokens) == 0 {
+		return errors.New("no apiToken found in provider config")
+	}
+	return nil
+}
+
+func (m *githubProviderInitializer) CreateProvider(config ProviderConfig) (Provider, error) {
+	return &githubProvider{
+		config:       config,
+		contextCache: createContextCache(&config),
+	}, nil
+}
+
+func (m *githubProvider) GetProviderType() string {
+	return providerTypeGithub
+}
+
+func (m *githubProvider) OnRequestHeaders(ctx wrapper.HttpContext, apiName ApiName, log wrapper.Log) (types.Action, error) {
+	if apiName != ApiNameChatCompletion && apiName != ApiNameEmbeddings {
+		return types.ActionContinue, errUnsupportedApiName
+	}
+	_ = util.OverwriteRequestHost(githubDomain)
+	if apiName == ApiNameChatCompletion {
+		_ = util.OverwriteRequestPath(githubCompletionPath)
+	}
+	if apiName == ApiNameEmbeddings {
+		_ = util.OverwriteRequestPath(githubEmbeddingPath)
+	}
+	_ = proxywasm.RemoveHttpRequestHeader("Accept-Encoding")
+	_ = proxywasm.RemoveHttpRequestHeader("Content-Length")
+	_ = proxywasm.ReplaceHttpRequestHeader("Authorization", m.config.GetRandomToken())
+	// Delay the header processing to allow changing streaming mode in OnRequestBody
+	return types.HeaderStopIteration, nil
+}
+
+func (m *githubProvider) OnRequestBody(ctx wrapper.HttpContext, apiName ApiName, body []byte, log wrapper.Log) (types.Action, error) {
+	if apiName != ApiNameChatCompletion && apiName != ApiNameEmbeddings {
+		return types.ActionContinue, errUnsupportedApiName
+	}
+	if apiName == ApiNameChatCompletion {
+		return m.onChatCompletionRequestBody(ctx, body, log)
+	}
+	if apiName == ApiNameEmbeddings {
+		return m.onEmbeddingsRequestBody(ctx, body, log)
+	}
+	return types.ActionContinue, errUnsupportedApiName
+}
+
+func (m *githubProvider) onChatCompletionRequestBody(ctx wrapper.HttpContext, body []byte, log wrapper.Log) (types.Action, error) {
+	request := &chatCompletionRequest{}
+	if err := decodeChatCompletionRequest(body, request); err != nil {
+		return types.ActionContinue, err
+	}
+	if request.Model == "" {
+		return types.ActionContinue, errors.New("missing model in chat completion request")
+	}
+	// 映射模型
+	mappedModel := getMappedModel(request.Model, m.config.modelMapping, log)
+	if mappedModel == "" {
+		return types.ActionContinue, errors.New("model becomes empty after applying the configured mapping")
+	}
+	ctx.SetContext(ctxKeyFinalRequestModel, mappedModel)
+	request.Model = mappedModel
+	return types.ActionContinue, replaceJsonRequestBody(request, log)
+}
+
+func (m *githubProvider) onEmbeddingsRequestBody(ctx wrapper.HttpContext, body []byte, log wrapper.Log) (types.Action, error) {
+	request := &embeddingsRequest{}
+	if err := json.Unmarshal(body, request); err != nil {
+		return types.ActionContinue, fmt.Errorf("unable to unmarshal request: %v", err)
+	}
+	if request.Model == "" {
+		return types.ActionContinue, errors.New("missing model in embeddings request")
+	}
+	// 映射模型
+	mappedModel := getMappedModel(request.Model, m.config.modelMapping, log)
+	if mappedModel == "" {
+		return types.ActionContinue, errors.New("model becomes empty after applying the configured mapping")
+	}
+	ctx.SetContext(ctxKeyFinalRequestModel, mappedModel)
+	request.Model = mappedModel
+	return types.ActionContinue, replaceJsonRequestBody(request, log)
+}

plugins/wasm-go/extensions/ai-proxy/provider/provider.go

@@ -5,9 +5,10 @@ import (
 	"math/rand"
 	"strings"
 
-	"github.com/alibaba/higress/plugins/wasm-go/pkg/wrapper"
 	"github.com/higress-group/proxy-wasm-go-sdk/proxywasm/types"
 	"github.com/tidwall/gjson"
+
+	"github.com/alibaba/higress/plugins/wasm-go/pkg/wrapper"
 )
 
 type ApiName string
@@ -20,6 +21,7 @@ const (
 	providerTypeMoonshot   = "moonshot"
 	providerTypeAzure      = "azure"
 	providerTypeAi360      = "ai360"
+	providerTypeGithub     = "github"
 	providerTypeQwen       = "qwen"
 	providerTypeOpenAI     = "openai"
 	providerTypeGroq       = "groq"
@@ -78,6 +80,7 @@ var (
 		providerTypeMoonshot:   &moonshotProviderInitializer{},
 		providerTypeAzure:      &azureProviderInitializer{},
 		providerTypeAi360:      &ai360ProviderInitializer{},
+		providerTypeGithub:     &githubProviderInitializer{},
 		providerTypeQwen:       &qwenProviderInitializer{},
 		providerTypeOpenAI:     &openaiProviderInitializer{},
 		providerTypeGroq:       &groqProviderInitializer{},