89 lines
2.7 KiB
Go
89 lines
2.7 KiB
Go
package registries
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"net/http"
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"strings"
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"time"
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"github.com/modelcontextprotocol/registry/pkg/model"
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)
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var (
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ErrMissingIdentifierForPyPI = errors.New("package identifier is required for PyPI packages")
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ErrMissingVersionForPyPi = errors.New("package version is required for PyPI packages")
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)
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// PyPIPackageResponse represents the structure returned by the PyPI JSON API
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type PyPIPackageResponse struct {
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Info struct {
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Description string `json:"description"`
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} `json:"info"`
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}
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// ValidatePyPI validates that a PyPI package contains the correct MCP server name
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func ValidatePyPI(ctx context.Context, pkg model.Package, serverName string) error {
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// Set default registry base URL if empty
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if pkg.RegistryBaseURL == "" {
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pkg.RegistryBaseURL = model.RegistryURLPyPI
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}
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if pkg.Identifier == "" {
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return ErrMissingIdentifierForPyPI
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}
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if pkg.Version == "" {
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return ErrMissingVersionForPyPi
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}
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// Validate that MCPB-specific fields are not present
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if pkg.FileSHA256 != "" {
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return fmt.Errorf("PyPI packages must not have 'fileSha256' field - this is only for MCPB packages")
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}
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// Validate that the registry base URL matches PyPI exactly
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if pkg.RegistryBaseURL != model.RegistryURLPyPI {
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return fmt.Errorf("registry type and base URL do not match: '%s' is not valid for registry type '%s'. Expected: %s",
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pkg.RegistryBaseURL, model.RegistryTypePyPI, model.RegistryURLPyPI)
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}
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client := &http.Client{Timeout: 10 * time.Second}
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url := fmt.Sprintf("%s/pypi/%s/%s/json", pkg.RegistryBaseURL, pkg.Identifier, pkg.Version)
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
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if err != nil {
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return fmt.Errorf("failed to create request: %w", err)
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}
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req.Header.Set("User-Agent", "MCP-Registry-Validator/1.0")
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req.Header.Set("Accept", "application/json")
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resp, err := client.Do(req)
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if err != nil {
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return fmt.Errorf("failed to fetch package metadata from PyPI: %w", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return fmt.Errorf("PyPI package '%s' not found (status: %d)", pkg.Identifier, resp.StatusCode)
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}
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var pypiResp PyPIPackageResponse
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if err := json.NewDecoder(resp.Body).Decode(&pypiResp); err != nil {
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return fmt.Errorf("failed to parse PyPI package metadata: %w", err)
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}
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// Check description (README) content
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description := pypiResp.Info.Description
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// Check for mcp-name: format (more specific)
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mcpNamePattern := "mcp-name: " + serverName
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if strings.Contains(description, mcpNamePattern) {
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return nil // Found as mcp-name: format
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}
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return fmt.Errorf("PyPI package '%s' ownership validation failed. The server name '%s' must appear as 'mcp-name: %s' in the package README", pkg.Identifier, serverName, serverName)
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}
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