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oauth2-proxy/pkg/app/templates.go

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Move template loading to app package
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package app
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import (
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"fmt"
initial code import
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"html/template"
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"os"
"path/filepath"
Add basic string functions to templates (#514) * Add basic string functions to templates Co-authored-by: Oliver <oliver006@users.noreply.github.com> Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk> Co-authored-by: Henry Jenkins <henry@henryjenkins.name>
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"strings"
Auth and standard logging with file rolling
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Fix import path for v7 (#800) * fix import path for v7 find ./ -name "*.go" | xargs sed -i -e 's|"github.com/oauth2-proxy/oauth2-proxy|"github.com/oauth2-proxy/oauth2-proxy/v7|' * fix module path * go mod tidy * fix installation docs * update CHANGELOG * Update CHANGELOG.md Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk> Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk>
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"github.com/oauth2-proxy/oauth2-proxy/v7/pkg/logger"
initial code import
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)
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const (
errorTemplateName = "error.html"
signInTemplateName = "sign_in.html"
support (optional) custom templates
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defaultErrorTemplate = `{{define "error.html"}}
don't promote htpasswd auth; auth directly
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<!DOCTYPE html>
<html lang="en" charset="utf-8">
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<head>
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<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<title>{{.StatusCode}} {{.Title}}</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bulma@0.9.1/css/bulma.min.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.2/css/all.min.css">
<script type="text/javascript">
document.addEventListener('DOMContentLoaded', function() {
let cardToggles = document.getElementsByClassName('card-toggle');
for (let i = 0; i < cardToggles.length; i++) {
cardToggles[i].addEventListener('click', e => {
e.currentTarget.parentElement.parentElement.childNodes[3].classList.toggle('is-hidden');
});
}
});
</script>
<style>
body {
height: 100vh;
}
.error-box {
margin: 1.25rem auto;
max-width: 600px;
}
.status-code {
font-size: 12rem;
font-weight: 600;
}
#more-info.card {
border: 1px solid #f0f0f0;
}
footer a {
text-decoration: underline;
}
</style>
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</head>
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<body class="has-background-light">
<section class="section">
<div class="box block error-box has-text-centered">
<div class="status-code">{{.StatusCode}}</div>
<div class="block">
<h1 class="subtitle is-1">{{.Title}}</h1>
</div>
{{ if .Message }}
<div id="more-info" class="block card is-fullwidth is-shadowless">
<header class="card-header is-shadowless">
<p class="card-header-title">More Info</p>
<a class="card-header-icon card-toggle">
<i class="fa fa-angle-down"></i>
</a>
</header>
<div class="card-content has-text-left is-hidden">
<div class="content">
{{.Message}}
</div>
</div>
</div>
{{ end }}
Use ErrorPage to render proxy error page
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{{ if .Redirect }}
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<hr>
<div class="columns">
<div class="column">
<form method="GET" action="{{.Redirect}}">
<button type="submit" class="button is-danger is-fullwidth">Go back</button>
</form>
</div>
<div class="column">
<form method="GET" action="{{.ProxyPrefix}}/sign_in">
<input type="hidden" name="rd" value="{{.Redirect}}">
<button type="submit" class="button is-primary is-fullwidth">Sign in</button>
</form>
</div>
</div>
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{{ end }}
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</div>
</section>
<footer class="footer has-text-grey has-background-light is-size-7">
<div class="content has-text-centered">
{{ if eq .Footer "-" }}
{{ else if eq .Footer ""}}
<p>Secured with <a href="https://github.com/oauth2-proxy/oauth2-proxy#oauth2_proxy" class="has-text-grey">OAuth2 Proxy</a> version {{.Version}}</p>
{{ else }}
<p>{{.Footer}}</p>
{{ end }}
</div>
</footer>
</body>
</html>
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{{end}}`
defaultSignInTemplate = `{{define "sign_in.html"}}
<!DOCTYPE html>
<html lang="en" charset="utf-8">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<title>Sign In</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bulma@0.9.1/css/bulma.min.css">
<style>
body {
height: 100vh;
}
.sign-in-box {
max-width: 400px;
margin: 1.25rem auto;
}
footer a {
text-decoration: underline;
}
</style>
<script>
if (window.location.hash) {
(function() {
var inputs = document.getElementsByName('rd');
for (var i = 0; i < inputs.length; i++) {
// Add hash, but make sure it is only added once
var idx = inputs[i].value.indexOf('#');
if (idx >= 0) {
// Remove existing hash from URL
inputs[i].value = inputs[i].value.substr(0, idx);
}
inputs[i].value += window.location.hash;
}
})();
}
</script>
</head>
<body class="has-background-light">
<section class="section">
<div class="box block sign-in-box has-text-centered">
<form method="GET" action="{{.ProxyPrefix}}/start">
<input type="hidden" name="rd" value="{{.Redirect}}">
{{ if .SignInMessage }}
<p class="block">{{.SignInMessage}}</p>
{{ end}}
<button type="submit" class="button block is-primary">Sign in with {{.ProviderName}}</button>
</form>
{{ if .CustomLogin }}
<hr>
<form method="POST" action="{{.ProxyPrefix}}/sign_in" class="block">
<input type="hidden" name="rd" value="{{.Redirect}}">
<div class="field">
<label class="label" for="username">Username</label>
<div class="control">
<input class="input" type="email" placeholder="e.g. userx@example.com" name="username" id="username">
</div>
</div>
<div class="field">
<label class="label" for="password">Password</label>
<div class="control">
<input class="input" type="password" placeholder="********" name="password" id="password">
</div>
</div>
<button class="button is-primary">Sign in</button>
{{ end }}
</form>
</div>
</section>
<footer class="footer has-text-grey has-background-light is-size-7">
<div class="content has-text-centered">
{{ if eq .Footer "-" }}
{{ else if eq .Footer ""}}
<p>Secured with <a href="https://github.com/oauth2-proxy/oauth2-proxy#oauth2_proxy" class="has-text-grey">OAuth2 Proxy</a> version {{.Version}}</p>
{{ else }}
<p>{{.Footer}}</p>
{{ end }}
</div>
</footer>
</body>
</html>
{{end}}`
)
// LoadTemplates adds the Sign In and Error templates from the custom template
// directory, or uses the defaults if they do not exist or the custom directory
// is not provided.
func LoadTemplates(customDir string) (*template.Template, error) {
t := template.New("").Funcs(template.FuncMap{
"ToUpper": strings.ToUpper,
"ToLower": strings.ToLower,
})
var err error
t, err = addTemplate(t, customDir, signInTemplateName, defaultSignInTemplate)
if err != nil {
return nil, fmt.Errorf("could not add Sign In template: %v", err)
}
t, err = addTemplate(t, customDir, errorTemplateName, defaultErrorTemplate)
if err != nil {
return nil, fmt.Errorf("could not add Error template: %v", err)
}
return t, nil
}
// addTemplate will add the template from the custom directory if provided,
// else it will add the default template.
func addTemplate(t *template.Template, customDir, fileName, defaultTemplate string) (*template.Template, error) {
filePath := filepath.Join(customDir, fileName)
if customDir != "" && isFile(filePath) {
t, err := t.ParseFiles(filePath)
if err != nil {
return nil, fmt.Errorf("failed to parse template %s: %v", filePath, err)
}
return t, nil
}
t, err := t.Parse(defaultTemplate)
if err != nil {
// This should not happen.
// Default templates should be tested and so should never fail to parse.
logger.Panic("Could not parse defaultTemplate: ", err)
}
return t, nil
}
// isFile checks if the file exists and checks whether it is a regular file.
// If either of these fail then it cannot be used as a template file.
func isFile(fileName string) bool {
info, err := os.Stat(fileName)
initial code import
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if err != nil {
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logger.Errorf("Could not load file %s: %v, will use default template", fileName, err)
return false
initial code import
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}
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return info.Mode().IsRegular()
initial code import
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}
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