mirror of https://github.com/dexidp/dex.git
Eric Chiang
10 years ago
7 changed files with 215 additions and 91 deletions
@ -1,101 +1,196 @@
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package server |
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import ( |
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"fmt" |
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"io" |
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"io/ioutil" |
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"log" |
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"net/http" |
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"path/filepath" |
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"sort" |
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"text/template" |
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) |
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"github.com/coreos/dex/storage" |
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const ( |
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tmplApproval = "approval.html" |
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tmplLogin = "login.html" |
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tmplPassword = "password.html" |
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) |
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const coreOSLogoURL = "https://coreos.com/assets/images/brand/coreos-wordmark-135x40px.png" |
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var requiredTmpls = []string{ |
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tmplApproval, |
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tmplLogin, |
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tmplPassword, |
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} |
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// TemplateConfig describes.
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type TemplateConfig struct { |
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// Directory of the templates. If empty, these will be loaded from memory.
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Dir string `yaml:"dir"` |
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// Defaults to the CoreOS logo and "dex".
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LogoURL string `yaml:"logoURL"` |
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Issuer string `yaml:"issuerName"` |
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} |
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type globalData struct { |
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LogoURL string |
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Issuer string |
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} |
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func loadTemplates(config TemplateConfig) (*templates, error) { |
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var tmpls *template.Template |
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if config.Dir != "" { |
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files, err := ioutil.ReadDir(config.Dir) |
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if err != nil { |
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return nil, fmt.Errorf("read dir: %v", err) |
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} |
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filenames := []string{} |
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for _, file := range files { |
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if file.IsDir() { |
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continue |
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} |
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filenames = append(filenames, filepath.Join(config.Dir, file.Name())) |
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} |
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if len(filenames) == 0 { |
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return nil, fmt.Errorf("no files in template dir %s", config.Dir) |
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} |
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if tmpls, err = template.ParseFiles(filenames...); err != nil { |
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return nil, fmt.Errorf("parse files: %v", err) |
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} |
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} else { |
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// Load templates from memory. This code is largely copied from the standard library's
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// ParseFiles source code.
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// See: https://goo.gl/6Wm4mN
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for name, data := range defaultTemplates { |
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var t *template.Template |
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if tmpls == nil { |
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tmpls = template.New(name) |
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} |
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if name == tmpls.Name() { |
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t = tmpls |
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} else { |
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t = tmpls.New(name) |
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} |
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if _, err := t.Parse(data); err != nil { |
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return nil, fmt.Errorf("parsing %s: %v", name, err) |
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} |
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} |
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} |
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missingTmpls := []string{} |
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for _, tmplName := range requiredTmpls { |
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if tmpls.Lookup(tmplName) == nil { |
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missingTmpls = append(missingTmpls, tmplName) |
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} |
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} |
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if len(missingTmpls) > 0 { |
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return nil, fmt.Errorf("missing template(s): %s", missingTmpls) |
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} |
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if config.LogoURL == "" { |
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config.LogoURL = coreOSLogoURL |
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} |
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if config.Issuer == "" { |
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config.Issuer = "dex" |
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} |
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return &templates{ |
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globalData: config, |
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loginTmpl: tmpls.Lookup(tmplLogin), |
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approvalTmpl: tmpls.Lookup(tmplApproval), |
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passwordTmpl: tmpls.Lookup(tmplPassword), |
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}, nil |
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} |
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var scopeDescriptions = map[string]string{ |
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"offline_access": "Have offline access", |
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"profile": "View basic profile information", |
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"email": "View your email", |
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} |
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type templates struct { |
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globalData TemplateConfig |
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loginTmpl *template.Template |
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approvalTmpl *template.Template |
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passwordTmpl *template.Template |
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} |
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type connectorInfo struct { |
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DisplayName string |
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URL string |
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ID string |
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Name string |
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URL string |
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} |
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var loginTmpl = template.Must(template.New("login-template").Parse(`<html> |
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<head></head> |
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<body> |
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<p>Login options</p> |
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{{ range $i, $connector := .Connectors }} |
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<a href="{{ $connector.URL }}?state={{ $.State }}">{{ $connector.DisplayName }}</a> |
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{{ end }} |
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</body> |
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</html>`)) |
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func renderLoginOptions(w http.ResponseWriter, connectors []connectorInfo, state string) { |
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type byName []connectorInfo |
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func (n byName) Len() int { return len(n) } |
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func (n byName) Less(i, j int) bool { return n[i].Name < n[j].Name } |
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func (n byName) Swap(i, j int) { n[i], n[j] = n[j], n[i] } |
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func (t *templates) login(w http.ResponseWriter, connectors []connectorInfo, state string) { |
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sort.Sort(byName(connectors)) |
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data := struct { |
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TemplateConfig |
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Connectors []connectorInfo |
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State string |
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}{connectors, state} |
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renderTemplate(w, loginTmpl, data) |
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}{t.globalData, connectors, state} |
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renderTemplate(w, t.loginTmpl, data) |
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} |
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var passwordTmpl = template.Must(template.New("password-template").Parse(`<html> |
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<body> |
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<p>Login</p> |
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<form action="{{ .Callback }}" method="POST"> |
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Login: <input type="text" name="login"/><br/> |
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Password: <input type="password" name="password"/><br/> |
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<input type="hidden" name="state" value="{{ .State }}"/> |
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<input type="submit"/> |
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{{ if .Message }} |
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<p>Error: {{ .Message }}</p> |
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{{ end }} |
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</form> |
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</body> |
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</html>`)) |
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func renderPasswordTmpl(w http.ResponseWriter, state, callback, message string) { |
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func (t *templates) password(w http.ResponseWriter, state, callback, lastUsername string, lastWasInvalid bool) { |
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data := struct { |
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TemplateConfig |
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State string |
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Callback string |
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Message string |
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}{state, callback, message} |
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renderTemplate(w, passwordTmpl, data) |
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PostURL string |
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Username string |
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Invalid bool |
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}{t.globalData, state, callback, lastUsername, lastWasInvalid} |
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renderTemplate(w, t.passwordTmpl, data) |
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} |
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var approvalTmpl = template.Must(template.New("approval-template").Parse(`<html> |
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<body> |
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<p>User: {{ .User }}</p> |
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<p>Client: {{ .ClientName }}</p> |
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<form method="post"> |
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<input type="hidden" name="state" value="{{ .State }}"/> |
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<input type="hidden" name="approval" value="approve"> |
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<button type="submit">Approve</button> |
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</form> |
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<form method="post"> |
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<input type="hidden" name="state" value="{{ .State }}"/> |
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<input type="hidden" name="approval" value="reject"> |
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<button type="submit">Reject</button> |
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</form> |
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</body> |
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</html>`)) |
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func renderApprovalTmpl(w http.ResponseWriter, state string, identity storage.Claims, client storage.Client, scopes []string) { |
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func (t *templates) approval(w http.ResponseWriter, state, username, clientName string, scopes []string) { |
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accesses := []string{} |
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for _, scope := range scopes { |
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access, ok := scopeDescriptions[scope] |
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if ok { |
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accesses = append(accesses, access) |
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} |
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} |
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sort.Strings(accesses) |
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data := struct { |
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User string |
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ClientName string |
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State string |
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}{identity.Email, client.Name, state} |
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renderTemplate(w, approvalTmpl, data) |
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TemplateConfig |
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User string |
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Client string |
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State string |
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Scopes []string |
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}{t.globalData, username, clientName, state, accesses} |
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renderTemplate(w, t.approvalTmpl, data) |
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} |
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func renderTemplate(w http.ResponseWriter, tmpl *template.Template, data interface{}) { |
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err := tmpl.Execute(w, data) |
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if err == nil { |
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return |
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} |
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// small io.Writer utilitiy to determine if executing the template wrote to the underlying response writer.
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type writeRecorder struct { |
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wrote bool |
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w io.Writer |
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} |
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func (w *writeRecorder) Write(p []byte) (n int, err error) { |
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w.wrote = true |
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return w.w.Write(p) |
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} |
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switch err := err.(type) { |
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case template.ExecError: |
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// An ExecError guarentees that Execute has not written to the underlying reader.
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func renderTemplate(w http.ResponseWriter, tmpl *template.Template, data interface{}) { |
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wr := &writeRecorder{w: w} |
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if err := tmpl.Execute(wr, data); err != nil { |
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log.Printf("Error rendering template %s: %s", tmpl.Name(), err) |
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// TODO(ericchiang): replace with better internal server error.
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http.Error(w, "Internal server error", http.StatusInternalServerError) |
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default: |
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// An error with the underlying write, such as the connection being
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// dropped. Ignore for now.
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if !wr.wrote { |
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// TODO(ericchiang): replace with better internal server error.
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http.Error(w, "Internal server error", http.StatusInternalServerError) |
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} |
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} |
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return |
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} |
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@ -1 +1,16 @@
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package server |
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import "testing" |
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func TestNewTemplates(t *testing.T) { |
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var config TemplateConfig |
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if _, err := loadTemplates(config); err != nil { |
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t.Fatal(err) |
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} |
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} |
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func TestLoadTemplates(t *testing.T) { |
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var config TemplateConfig |
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config.Dir = "../web/templates" |
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} |
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