diff --git a/internal/user/repository.go b/internal/user/repository.go new file mode 100644 index 0000000..5b5687c --- /dev/null +++ b/internal/user/repository.go @@ -0,0 +1,14 @@ +package user + +import ( + "context" + "errors" + + "source.toby3d.me/website/oauth/internal/domain" +) + +type Repository interface { + Get(ctx context.Context, me *domain.Me) (*domain.User, error) +} + +var ErrNotExist = errors.New("user not exists") diff --git a/internal/user/repository/http/http_user.go b/internal/user/repository/http/http_user.go new file mode 100644 index 0000000..b7c22ca --- /dev/null +++ b/internal/user/repository/http/http_user.go @@ -0,0 +1,261 @@ +package http + +import ( + "bytes" + "context" + "encoding/json" + "fmt" + "net/url" + "strings" + + "github.com/tomnomnom/linkheader" + http "github.com/valyala/fasthttp" + "willnorris.com/go/microformats" + + "source.toby3d.me/website/oauth/internal/domain" + "source.toby3d.me/website/oauth/internal/user" +) + +type ( + //nolint: tagliatelle + Response struct { + // The server's issuer identifier. The issuer identifier is a + // URL that uses the "https" scheme and has no query or fragment + // components. The identifier MUST be a prefix of the + // indieauth-metadata URL. e.g. for an indieauth-metadata + // endpoint + // https://example.com/.well-known/oauth-authorization-server, + // the issuer URL could be https://example.com/, or for a + // metadata URL of + // https://example.com/wp-json/indieauth/1.0/metadata, the + // issuer URL could be https://example.com/wp-json/indieauth/1.0 + Issuer *domain.URL `json:"issuer"` + + // The Authorization Endpoint. + AuthorizationEndpoint *domain.URL `json:"authorization_endpoint"` + + // The Token Endpoint. + TokenEndpoint *domain.URL `json:"token_endpoint"` + + // JSON array containing scope values supported by the + // IndieAuth server. Servers MAY choose not to advertise some + // supported scope values even when this parameter is used. + ScopesSupported domain.Scopes `json:"scopes_supported,omitempty"` + + // JSON array containing the response_type values supported. + // This differs from RFC8414 in that this parameter is OPTIONAL + // and that, if omitted, the default is code. + ResponseTypesSupported []domain.ResponseType `json:"response_types_supported,omitempty"` + + // JSON array containing grant type values supported. If + // omitted, the default value differs from RFC8414 and is + // authorization_code. + GrantTypesSupported []domain.GrantType `json:"grant_types_supported,omitempty"` + + // URL of a page containing human-readable information that + // developers might need to know when using the server. This + // might be a link to the IndieAuth spec or something more + // personal to your implementation. + ServiceDocumentation *domain.URL `json:"service_documentation,omitempty"` + + // JSON array containing the methods supported for PKCE. This + // parameter differs from RFC8414 in that it is not optional as + // PKCE is REQUIRED. + CodeChallengeMethodsSupported []domain.CodeChallengeMethod `json:"code_challenge_methods_supported"` + + // Boolean parameter indicating whether the authorization server + // provides the iss parameter. If omitted, the default value is + // false. As the iss parameter is REQUIRED, this is provided for + // compatibility with OAuth 2.0 servers implementing the + // parameter. + // + //nolint: lll + AuthorizationResponseIssParameterSupported bool `json:"authorization_response_iss_parameter_supported,omitempty"` + } + + httpUserRepository struct { + client *http.Client + } +) + +const DefaultMaxRedirectsCount int = 10 + +const ( + relAuthorizationEndpoint string = "authorization_endpoint" + relIndieAuthMetadata string = "indieauth-metadata" + relMicropub string = "micropub" + relMicrosub string = "microsub" + relTicketEndpoint string = "ticket_endpoint" + relTokenEndpoint string = "token_endpoint" + + hCard string = "h-card" + + propertyEmail string = "email" + propertyName string = "name" + propertyPhoto string = "photo" + propertyURL string = "url" +) + +func NewHTTPUserRepository(client *http.Client) user.Repository { + return &httpUserRepository{ + client: client, + } +} + +func (repo *httpUserRepository) Get(ctx context.Context, me *domain.Me) (*domain.User, error) { + req := http.AcquireRequest() + defer http.ReleaseRequest(req) + req.SetRequestURI(me.String()) + req.Header.SetMethod(http.MethodGet) + + resp := http.AcquireResponse() + defer http.ReleaseResponse(resp) + + if err := repo.client.DoRedirects(req, resp, DefaultMaxRedirectsCount); err != nil { + return nil, fmt.Errorf("cannot fetch user by me: %w", err) + } + + profile := domain.NewProfile() + profile.Name = extractValues(resp, propertyName) + + for _, val := range extractValues(resp, propertyEmail) { + profile.Email = append(profile.Email, domain.Email(strings.TrimPrefix(val, "mailto:"))) + } + + for _, val := range extractValues(resp, propertyPhoto) { + u, err := domain.NewURL(val) + if err != nil { + continue + } + + profile.Photo = append(profile.Photo, u) + } + + for _, val := range extractValues(resp, propertyURL) { + u, err := domain.NewURL(val) + if err != nil { + continue + } + + profile.URL = append(profile.URL, u) + } + + // TODO(toby3d): handle error here? + resolvedMe, _ := domain.NewMe(string(resp.Header.Peek(http.HeaderLocation))) + + u := &domain.User{ + Profile: profile, + Me: resolvedMe, + AuthorizationEndpoint: extractEndpoint(resp, relAuthorizationEndpoint), + IndieAuthMetadata: extractEndpoint(resp, relIndieAuthMetadata), + Micropub: extractEndpoint(resp, relMicropub), + Microsub: extractEndpoint(resp, relMicrosub), + TicketEndpoint: extractEndpoint(resp, relTicketEndpoint), + TokenEndpoint: extractEndpoint(resp, relTokenEndpoint), + } + + if u.IndieAuthMetadata == nil { + return u, nil + } + + // TODO(toby3d): handle error here? + _ = extractFromMetadata(repo.client, u.IndieAuthMetadata, u) + + return u, nil +} + +func extractEndpoint(resp *http.Response, name string) *domain.URL { + u, err := extractEndpointFromHeader(resp, name) + if err == nil && u != nil { + return u + } + + if u, err = extractEndpointFromBody(resp, name); err == nil && u != nil { + return u + } + + return nil +} + +func extractValues(resp *http.Response, key string) []string { + results := make([]string, 0) + + for _, item := range microformats.Parse(bytes.NewReader(resp.Body()), nil).Items { + if len(item.Type) == 0 || item.Type[0] != hCard { + continue + } + + properties, ok := item.Properties[key] + if !ok || len(properties) == 0 { + return nil + } + + for j := range properties { + switch p := properties[j].(type) { + case string: + results = append(results, p) + case map[string][]interface{}: + for _, val := range p["value"] { + v, ok := val.(string) + if !ok { + continue + } + + results = append(results, v) + } + } + } + + return results + } + + return nil +} + +func extractEndpointFromHeader(resp *http.Response, name string) (*domain.URL, error) { + for _, link := range linkheader.Parse(string(resp.Header.Peek(http.HeaderLink))) { + if !strings.EqualFold(link.Rel, name) { + continue + } + + u := http.AcquireURI() + if err := u.Parse(resp.Header.Peek(http.HeaderHost), []byte(link.URL)); err != nil { + return nil, err + } + + return &domain.URL{URI: u}, nil + } + + return nil, nil +} + +func extractEndpointFromBody(resp *http.Response, name string) (*domain.URL, error) { + host, err := url.Parse(string(resp.Header.Peek(http.HeaderHost))) + if err != nil { + return nil, fmt.Errorf("cannot parse host header: %w", err) + } + + endpoints, ok := microformats.Parse(bytes.NewReader(resp.Body()), host).Rels[name] + if !ok || len(endpoints) == 0 { + return nil, nil + } + + return domain.NewURL(endpoints[len(endpoints)-1]) +} + +func extractFromMetadata(client *http.Client, endpoint *domain.URL, dst *domain.User) error { + _, body, err := client.Get(nil, endpoint.String()) + if err != nil { + return err + } + + resp := new(Response) + if err = json.Unmarshal(body, resp); err != nil { + return err + } + + dst.AuthorizationEndpoint = resp.AuthorizationEndpoint + dst.TokenEndpoint = resp.TokenEndpoint + + return nil +} diff --git a/internal/user/repository/http/http_user_test.go b/internal/user/repository/http/http_user_test.go new file mode 100644 index 0000000..e925f4f --- /dev/null +++ b/internal/user/repository/http/http_user_test.go @@ -0,0 +1,97 @@ +package http_test + +import ( + "context" + "encoding/json" + "fmt" + "strings" + "testing" + + "github.com/fasthttp/router" + "github.com/stretchr/testify/assert" + "github.com/stretchr/testify/require" + http "github.com/valyala/fasthttp" + + "source.toby3d.me/website/oauth/internal/common" + "source.toby3d.me/website/oauth/internal/domain" + "source.toby3d.me/website/oauth/internal/testing/httptest" + repository "source.toby3d.me/website/oauth/internal/user/repository/http" +) + +const testBody string = ` + + +
+ + +