forgejo-federation/modules/packages/nuget/metadata.go
Michael Kriese 97cc955101
[GITEA] feat(nuget): basic manifest download
Refs: https://codeberg.org/forgejo/forgejo/pulls/2222

(cherry picked from commit 5f837efc15f3d1e0d7fbed7fc569251143266584)

fix: write xml header

(cherry picked from commit a715984a42be9da81c48106d5eae244098ac1108)

fix: optional elements and xml schema

(cherry picked from commit 6ea6895a3616246e7282aa20d8f010fa931b60ea)

fix: pass all other requests to file search

(cherry picked from commit 9bfc74833a3b657453b4519573598432a87e3e3c)

test: add integration test

(cherry picked from commit b798f4ce86daa78e694c5c142e6f5f44938e6cb6)

fix: use xmlResponse

(cherry picked from commit 7f76df0b246c64fac0eeb115642c8cb6eb676f36)
(cherry picked from commit e18d574ca40905aec52fbbe8247ba83fd01874dd)
2024-02-05 15:08:04 +01:00

275 lines
7.9 KiB
Go

// Copyright 2021 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package nuget
import (
"archive/zip"
"bytes"
"encoding/xml"
"fmt"
"io"
"path/filepath"
"regexp"
"strings"
"code.gitea.io/gitea/modules/util"
"code.gitea.io/gitea/modules/validation"
"github.com/hashicorp/go-version"
)
var (
// ErrMissingNuspecFile indicates a missing Nuspec file
ErrMissingNuspecFile = util.NewInvalidArgumentErrorf("Nuspec file is missing")
// ErrNuspecFileTooLarge indicates a Nuspec file which is too large
ErrNuspecFileTooLarge = util.NewInvalidArgumentErrorf("Nuspec file is too large")
// ErrNuspecInvalidID indicates an invalid id in the Nuspec file
ErrNuspecInvalidID = util.NewInvalidArgumentErrorf("Nuspec file contains an invalid id")
// ErrNuspecInvalidVersion indicates an invalid version in the Nuspec file
ErrNuspecInvalidVersion = util.NewInvalidArgumentErrorf("Nuspec file contains an invalid version")
)
// PackageType specifies the package type the metadata describes
type PackageType int
const (
// DependencyPackage represents a package (*.nupkg)
DependencyPackage PackageType = iota + 1
// SymbolsPackage represents a symbol package (*.snupkg)
SymbolsPackage
PropertySymbolID = "nuget.symbol.id"
)
var idmatch = regexp.MustCompile(`\A\w+(?:[.-]\w+)*\z`)
const maxNuspecFileSize = 3 * 1024 * 1024
// Package represents a Nuget package
type Package struct {
PackageType PackageType
ID string
Version string
Metadata *Metadata
}
// Metadata represents the metadata of a Nuget package
type Metadata struct {
Description string `json:"description,omitempty"`
ReleaseNotes string `json:"release_notes,omitempty"`
Authors string `json:"authors,omitempty"`
ProjectURL string `json:"project_url,omitempty"`
RepositoryURL string `json:"repository_url,omitempty"`
RequireLicenseAcceptance bool `json:"require_license_acceptance"`
Dependencies map[string][]Dependency `json:"dependencies,omitempty"`
}
// Dependency represents a dependency of a Nuget package
type Dependency struct {
ID string `json:"id"`
Version string `json:"version"`
}
type nuspecPackageType struct {
Name string `xml:"name,attr"`
}
type nuspecPackageTypes struct {
PackageType []nuspecPackageType `xml:"packageType"`
}
type nuspecRepository struct {
URL string `xml:"url,attr,omitempty"`
Type string `xml:"type,attr,omitempty"`
}
type nuspecDependency struct {
ID string `xml:"id,attr"`
Version string `xml:"version,attr"`
Exclude string `xml:"exclude,attr,omitempty"`
}
type nuspecGroup struct {
TargetFramework string `xml:"targetFramework,attr"`
Dependency []nuspecDependency `xml:"dependency"`
}
type nuspecDependencies struct {
Group []nuspecGroup `xml:"group"`
}
type nuspeceMetadata struct {
ID string `xml:"id"`
Version string `xml:"version"`
Authors string `xml:"authors"`
RequireLicenseAcceptance bool `xml:"requireLicenseAcceptance,omitempty"`
ProjectURL string `xml:"projectUrl,omitempty"`
Description string `xml:"description"`
ReleaseNotes string `xml:"releaseNotes,omitempty"`
PackageTypes *nuspecPackageTypes `xml:"packageTypes,omitempty"`
Repository *nuspecRepository `xml:"repository,omitempty"`
Dependencies *nuspecDependencies `xml:"dependencies,omitempty"`
}
type nuspecPackage struct {
XMLName xml.Name `xml:"package"`
Xmlns string `xml:"xmlns,attr"`
Metadata nuspeceMetadata `xml:"metadata"`
}
// ParsePackageMetaData parses the metadata of a Nuget package file
func ParsePackageMetaData(r io.ReaderAt, size int64) (*Package, error) {
archive, err := zip.NewReader(r, size)
if err != nil {
return nil, err
}
for _, file := range archive.File {
if filepath.Dir(file.Name) != "." {
continue
}
if strings.HasSuffix(strings.ToLower(file.Name), ".nuspec") {
if file.UncompressedSize64 > maxNuspecFileSize {
return nil, ErrNuspecFileTooLarge
}
f, err := archive.Open(file.Name)
if err != nil {
return nil, err
}
defer f.Close()
return ParseNuspecMetaData(f)
}
}
return nil, ErrMissingNuspecFile
}
// ParseNuspecMetaData parses a Nuspec file to retrieve the metadata of a Nuget package
func ParseNuspecMetaData(r io.Reader) (*Package, error) {
var p nuspecPackage
if err := xml.NewDecoder(r).Decode(&p); err != nil {
return nil, err
}
if !idmatch.MatchString(p.Metadata.ID) {
return nil, ErrNuspecInvalidID
}
v, err := version.NewSemver(p.Metadata.Version)
if err != nil {
return nil, ErrNuspecInvalidVersion
}
if !validation.IsValidURL(p.Metadata.ProjectURL) {
p.Metadata.ProjectURL = ""
}
packageType := DependencyPackage
if p.Metadata.PackageTypes != nil {
for _, pt := range p.Metadata.PackageTypes.PackageType {
if pt.Name == "SymbolsPackage" {
packageType = SymbolsPackage
break
}
}
}
m := &Metadata{
Description: p.Metadata.Description,
ReleaseNotes: p.Metadata.ReleaseNotes,
Authors: p.Metadata.Authors,
ProjectURL: p.Metadata.ProjectURL,
RequireLicenseAcceptance: p.Metadata.RequireLicenseAcceptance,
Dependencies: make(map[string][]Dependency),
}
if p.Metadata.Repository != nil {
m.RepositoryURL = p.Metadata.Repository.URL
}
if p.Metadata.Dependencies != nil {
for _, group := range p.Metadata.Dependencies.Group {
deps := make([]Dependency, 0, len(group.Dependency))
for _, dep := range group.Dependency {
if dep.ID == "" || dep.Version == "" {
continue
}
deps = append(deps, Dependency{
ID: dep.ID,
Version: dep.Version,
})
}
if len(deps) > 0 {
m.Dependencies[group.TargetFramework] = deps
}
}
}
return &Package{
PackageType: packageType,
ID: p.Metadata.ID,
Version: toNormalizedVersion(v),
Metadata: m,
}, nil
}
// https://learn.microsoft.com/en-us/nuget/concepts/package-versioning#normalized-version-numbers
// https://github.com/NuGet/NuGet.Client/blob/dccbd304b11103e08b97abf4cf4bcc1499d9235a/src/NuGet.Core/NuGet.Versioning/VersionFormatter.cs#L121
func toNormalizedVersion(v *version.Version) string {
var buf bytes.Buffer
segments := v.Segments64()
fmt.Fprintf(&buf, "%d.%d.%d", segments[0], segments[1], segments[2])
if len(segments) > 3 && segments[3] > 0 {
fmt.Fprintf(&buf, ".%d", segments[3])
}
pre := v.Prerelease()
if pre != "" {
fmt.Fprint(&buf, "-", pre)
}
return buf.String()
}
// returning any here because we use a private type and we don't need the type for xml marshalling
func GenerateNuspec(pd *Package) any {
m := nuspeceMetadata{
ID: pd.ID,
Version: pd.Version,
Authors: pd.Metadata.Authors,
Description: pd.Metadata.Description,
ProjectURL: pd.Metadata.ProjectURL,
RequireLicenseAcceptance: pd.Metadata.RequireLicenseAcceptance,
}
if pd.Metadata.RepositoryURL != "" {
m.Repository = &nuspecRepository{
URL: pd.Metadata.RepositoryURL,
}
}
groups := len(pd.Metadata.Dependencies)
if groups > 0 {
m.Dependencies = &nuspecDependencies{
Group: make([]nuspecGroup, 0, groups),
}
for tgf, deps := range pd.Metadata.Dependencies {
if len(deps) == 0 {
continue
}
gDeps := make([]nuspecDependency, 0, len(deps))
for _, dep := range deps {
gDeps = append(gDeps, nuspecDependency{
ID: dep.ID,
Version: dep.Version,
})
}
m.Dependencies.Group = append(m.Dependencies.Group, nuspecGroup{
TargetFramework: tgf,
Dependency: gDeps,
})
}
}
return &nuspecPackage{
Xmlns: "http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd",
Metadata: m,
}
}