wehub-resource-sync
122 lines
3.6 KiB
Go
122 lines
3.6 KiB
Go
// Copyright 2026 The Casdoor Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package controllers
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import (
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"encoding/json"
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"net/http"
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"net/http/httputil"
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"net/url"
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"github.com/casdoor/casdoor/mcpself"
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"github.com/casdoor/casdoor/object"
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"github.com/casdoor/casdoor/util"
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)
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// ProxyServer
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// @Title ProxyServer
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// @Tag Server API
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// @Description proxy request to the upstream MCP server by Server URL
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// @Param owner path string true "The owner name of the server"
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// @Param name path string true "The name of the server"
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// @Success 200 {object} mcp.McpResponse The Response object
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// @router /server/:owner/:name [get,post]
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func (c *ApiController) ProxyServer() {
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owner := c.Ctx.Input.Param(":owner")
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name := c.Ctx.Input.Param(":name")
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var mcpReq *mcpself.McpRequest
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err := json.Unmarshal(c.Ctx.Input.RequestBody, &mcpReq)
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if err != nil {
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c.McpResponseError(1, -32700, "Parse error", err.Error())
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return
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}
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if util.IsStringsEmpty(owner, name) {
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c.McpResponseError(1, -32600, "invalid server identifier", nil)
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return
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}
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server, err := object.GetServer(util.GetId(owner, name))
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if err != nil {
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c.McpResponseError(mcpReq.ID, -32600, "server not found", err.Error())
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return
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}
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if server == nil {
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c.McpResponseError(mcpReq.ID, -32600, "server not found", nil)
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return
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}
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if server.Url == "" {
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c.McpResponseError(mcpReq.ID, -32600, "server URL is empty", nil)
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return
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}
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targetUrl, err := url.Parse(server.Url)
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if err != nil || !targetUrl.IsAbs() || targetUrl.Host == "" {
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c.McpResponseError(mcpReq.ID, -32600, "server URL is invalid", nil)
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return
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}
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if targetUrl.Scheme != "http" && targetUrl.Scheme != "https" {
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c.McpResponseError(mcpReq.ID, -32600, "server URL scheme is invalid", nil)
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return
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}
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if mcpReq.Method == "tools/call" {
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var params mcpself.McpCallToolParams
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err = json.Unmarshal(mcpReq.Params, ¶ms)
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if err != nil {
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c.McpResponseError(mcpReq.ID, -32600, "Invalid request", err.Error())
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return
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}
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if len(server.Tools) > 0 {
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toolAllowed := false
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for _, tool := range server.Tools {
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if tool.Name == params.Name {
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if !tool.IsAllowed {
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c.McpResponseError(mcpReq.ID, -32600, "tool is forbidden", nil)
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return
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}
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toolAllowed = true
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break
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}
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}
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if !toolAllowed {
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c.McpResponseError(mcpReq.ID, -32600, "tool is not in the allowlist", nil)
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return
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}
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}
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}
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proxy := httputil.NewSingleHostReverseProxy(targetUrl)
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proxy.ErrorHandler = func(writer http.ResponseWriter, request *http.Request, proxyErr error) {
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c.Ctx.Output.SetStatus(http.StatusBadGateway)
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c.McpResponseError(mcpReq.ID, -32603, "failed to proxy server request: %s", proxyErr.Error())
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}
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proxy.Director = func(request *http.Request) {
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request.URL.Scheme = targetUrl.Scheme
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request.URL.Host = targetUrl.Host
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request.Host = targetUrl.Host
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request.URL.Path = targetUrl.Path
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request.URL.RawPath = ""
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request.URL.RawQuery = targetUrl.RawQuery
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if server.Token != "" {
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request.Header.Set("Authorization", "Bearer "+server.Token)
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}
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}
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proxy.ServeHTTP(c.Ctx.ResponseWriter, c.Ctx.Request)
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}
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