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Add cloudfront CDN and CORS filter#84

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Merged
billoneil merged 1 commit intomasterfromf/cdn
Sep 29, 2018
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Original file line numberDiff line numberDiff line change
Expand Up@@ -4,6 +4,8 @@
import java.time.format.DateTimeFormatter;

import com.github.jknack.handlebars.Options;
import com.google.common.base.Strings;
import com.typesafe.config.Config;

public class TemplateHelpers {
static final DateTimeFormatter MMMddyyyyFmt = DateTimeFormatter.ofPattern("MMM dd, yyyy");
Expand All@@ -12,4 +14,16 @@ public static CharSequence dateFormat(String dateString, Options options) {
LocalDateTime date = LocalDateTime.parse(dateString);
return MMMddyyyyFmt.format(date);
}

private static final String cdnHost = Configs.<String>getOrDefault(Configs.properties(),
"cdn.host",
Config::getString,
() -> null);
// This expects the url to be relative (eg. /static/img.jpg)
public static CharSequence cdn(String url) {
if (Strings.isNullOrEmpty(cdnHost)) {
return url;
}
return cdnHost + url;
}
}
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Original file line numberDiff line numberDiff line change
Expand Up@@ -31,7 +31,7 @@ public class Templating {
static {
Templating.Builder builder =
new Templating.Builder()
.withHelper("dateFormat", TemplateHelpers::dateFormat)
.withHelpers(new TemplateHelpers())
.withHelper("md", new MarkdownHelper())
.withHelper(AssignHelper.NAME, AssignHelper.INSTANCE)
.register(HumanizeHelper::register);
Expand DownExpand Up@@ -148,6 +148,12 @@ public <T> Builder withHelper(String helperName, Helper<T> helper) {
return this;
}

public <T> Builder withHelpers(Object helpers) {
log.debug("using template helpers {}" , helpers.getClass());
handlebars.registerHelpers(helpers);
return this;
}

public <T> Builder register(Consumer<Handlebars> consumer) {
log.debug("registering helpers");
consumer.accept(handlebars);
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Expand Up@@ -17,4 +17,12 @@ default Optional<String> getHeader(HttpServerExchange exchange, String header) {
RequestHeaderAttribute reqHeader = new RequestHeaderAttribute(new HttpString(header));
return Optional.ofNullable(reqHeader.readAttribute(exchange));
}

default void setHeader(HttpServerExchange exchange, HttpString header, String value) {
exchange.getResponseHeaders().add(header, value);
}

default void setHeader(HttpServerExchange exchange, String header, String value) {
exchange.getResponseHeaders().add(new HttpString(header), value);
}
}
Original file line numberDiff line numberDiff line change
Expand Up@@ -3,6 +3,7 @@

import java.io.File;
import java.nio.file.Paths;
import java.util.Set;
import java.util.SortedMap;

import org.slf4j.Logger;
Expand DownExpand Up@@ -168,4 +169,18 @@ public static HttpHandler securityHeaders(HttpHandler next, ReferrerPolicy polic
return security.complete(next);
}
// {{end:securityHeaders}}

public static HttpHandler corsOriginWhitelist(HttpHandler next, Set<String> originWhitelist) {
return exchange -> {
String origin = Exchange.headers()
.getHeader(exchange, Headers.ORIGIN)
.orElse("");
log.debug("Origin: {} Whitelist: {}", origin, originWhitelist);
if (originWhitelist.contains(origin)) {
log.debug("Origin whitelist matched adding CORS header");
Exchange.headers().setHeader(exchange, "Access-Control-Allow-Origin", origin);
}
next.handleRequest(exchange);
};
}
}
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Expand Up@@ -7,6 +7,7 @@
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.collect.Sets;
import com.stubbornjava.common.seo.SitemapRoutes;
import com.stubbornjava.common.undertow.SimpleServer;
import com.stubbornjava.common.undertow.handlers.CustomHandlers;
Expand DownExpand Up@@ -37,27 +38,28 @@ private static HttpHandler exceptionHandler(HttpHandler next) {
// {{start:csp}}
private static HttpHandler contentSecurityPolicy(HttpHandler delegate) {
return new ContentSecurityPolicyHandler.Builder()
.defaultSrc(ContentSecurityPolicy.SELF)
.scriptSrc(ContentSecurityPolicy.SELF.getValue(), "https://www.google-analytics.com")
.defaultSrc(ContentSecurityPolicy.SELF.getValue(), "https://*.stubbornjava.com")
.scriptSrc(ContentSecurityPolicy.SELF.getValue(), "https://*.stubbornjava.com", "https://www.google-analytics.com", "data:")
// Drop the wildcard when we host our own images.
.imgSrc(ContentSecurityPolicy.SELF.getValue(), "https://www.google-analytics.com", "*")
.connectSrc(ContentSecurityPolicy.SELF.getValue(), "https://www.google-analytics.com")
.fontSrc(ContentSecurityPolicy.SELF.getValue(), "data:")
.styleSrc(ContentSecurityPolicy.SELF.getValue(), ContentSecurityPolicy.UNSAFE_INLINE.getValue())
.imgSrc(ContentSecurityPolicy.SELF.getValue(), "https://*.stubbornjava.com", "https://www.google-analytics.com", "data:")
.connectSrc(ContentSecurityPolicy.SELF.getValue(), "https://*.stubbornjava.com", "https://www.google-analytics.com")
.fontSrc(ContentSecurityPolicy.SELF.getValue(), "https://*.stubbornjava.com", "data:")
.styleSrc(ContentSecurityPolicy.SELF.getValue(), ContentSecurityPolicy.UNSAFE_INLINE.getValue(), "https://*.stubbornjava.com")
.build(delegate);
}
// {{end:csp}}

// {{start:middleware}}
private static HttpHandler wrapWithMiddleware(HttpHandler next) {
return MiddlewareBuilder.begin(PageRoutes::redirector)
return MiddlewareBuilder.begin(ex -> CustomHandlers.accessLog(ex, logger))
.next(StubbornJavaWebApp::exceptionHandler)
.next(CustomHandlers::statusCodeMetrics)
.next(handler -> CustomHandlers.securityHeaders(handler, ReferrerPolicy.STRICT_ORIGIN_WHEN_CROSS_ORIGIN))
.next(StubbornJavaWebApp::contentSecurityPolicy)
.next(CustomHandlers::gzip)
.next(h -> CustomHandlers.corsOriginWhitelist(next, Sets.newHashSet("https://www.stubbornjava.com")))
.next(PageRoutes::redirector)
.next(BlockingHandler::new)
.next(ex -> CustomHandlers.accessLog(ex, logger))
.next(CustomHandlers::statusCodeMetrics)
.next(StubbornJavaWebApp::exceptionHandler)
.complete(next);
}
// {{end:middleware}}
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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,3 @@
cdn {
host="https://cdn.stubbornjava.com"
}
2 changes: 1 addition & 1 deletionstubbornjava-webapp/ui/src/common/head.hbs
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Expand Up@@ -3,4 +3,4 @@
<meta http-equiv="x-ua-compatible" content="ie=edge"/>
<meta name="description" content="{{#if metaDesc }}{{metaDesc}}{{/if}}"/>
{{!-- <link rel="stylesheet" href="/css/3rdparty.css"/>--}}
<link rel="stylesheet" href="/assets/css/common.css"/>
<link rel="stylesheet" href="{{cdn "/assets/css/common.css"}}"/>
2 changes: 1 addition & 1 deletionstubbornjava-webapp/ui/src/common/scripts.hbs
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@@ -1,3 +1,3 @@
{{!-- <script async type="text/javascript" src="/js/3rdparty.js"></script> --}}
{{!-- Making this script async breaks the jump to id functionality :( --}}
<script type="text/javascript" src="/assets/js/common.js"></script>
<script type="text/javascript" src="{{cdn "/assets/js/common.js"}}"></script>
2 changes: 1 addition & 1 deletionstubbornjava-webapp/ui/src/widgets/nav/header.hbs
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@@ -1,6 +1,6 @@
<nav class="navbar navbar-inverse navbar-expand fixed-top" role="navigation">
<a class="navbar-brand logo" href="/">
<span class="align-middle"><img src="/assets/images/PenguinHQ_compressed.png" height="40px"> Stubborn<span class="java">Java</span></span>
<span class="align-middle"><img src="{{cdn "/assets/images/PenguinHQ_compressed.png"}}" height="40px"> Stubborn<span class="java">Java</span></span>
{{!-- Add this SVG instead later. I can't get CSS to work --}}
{{!-- <span>{{> templates/src/widgets/nav/logo }} Stubborn<span class="java">Java</span></span> --}}
</a>
Expand Down
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