From 310a5e486be10d3beee48337f6275a7588660ecc Mon Sep 17 00:00:00 2001
From: Aecio Santos <aecio.solando@gmail.com>
Date: Tue, 31 Oct 2017 19:18:42 -0400
Subject: [PATCH] Support for serving web interface from non-root path (Closes
 #137)

---
 ache-dashboard/package.json                         |  1 +
 ache-dashboard/src/App.js                           |  9 +++++++--
 docs/rest-api.rst                                   | 13 ++++++++++++-
 src/main/java/focusedCrawler/rest/RestConfig.java   |  7 +++++++
 src/main/java/focusedCrawler/rest/RestServer.java   |  3 +--
 .../rest/StaticFileHandlerFilter.java               |  8 +++++++-
 6 files changed, 35 insertions(+), 6 deletions(-)

diff --git a/ache-dashboard/package.json b/ache-dashboard/package.json
index 8820c7ead..cf3945ac7 100644
--- a/ache-dashboard/package.json
+++ b/ache-dashboard/package.json
@@ -23,5 +23,6 @@
     "test": "react-scripts test --env=jsdom",
     "eject": "react-scripts eject"
   },
+  "homepage": ".",
   "proxy": "http://localhost:8080"
 }
diff --git a/ache-dashboard/src/App.js b/ache-dashboard/src/App.js
index b504479b6..c2edc9c99 100644
--- a/ache-dashboard/src/App.js
+++ b/ache-dashboard/src/App.js
@@ -47,8 +47,14 @@ const Navigation = ({ label, to, activeOnlyWhenExact }) => (
 
 class App extends Component {
   render() {
+    let meta = document.getElementsByName("base_path")[0];
+    let basePath;
+    if(meta !== undefined) {
+      basePath = meta.content;
+    }
+
     return (
-      <Router>
+      <Router basename={basePath}>
         <div>
           <Header/>
           <div className="container">
@@ -56,7 +62,6 @@ class App extends Component {
               <Route exact path="/" component={StartCrawl}/>
               <Route exact path="/monitoring" component={MetricsMonitor}/>
               <Route exact path="/search" component={Search}/>
-              
             </div>
           </div>
         </div>
diff --git a/docs/rest-api.rst b/docs/rest-api.rst
index 797d4c9ea..d2ba2de07 100644
--- a/docs/rest-api.rst
+++ b/docs/rest-api.rst
@@ -14,8 +14,12 @@ The default HTTP settings can be changed using the following lines in the
   http.host: 127.0.0.1
   http.cors.enabled: true
 
+
+Server Mode
+-----------
+
 Besides using the ``ache startCrawl`` command, ACHE can also be started in server
-mode and controlled using the web user interface.
+mode and controlled using the web user interface or the REST API.
 
 To start ACHE in server mode, you can use::
 
@@ -30,6 +34,13 @@ where:
  * ``$CONFIG`` is the path to where ``ache.yml`` is stored and
  * ``$DATA`` is the path where ACHE is going to store its data.
 
+
+If you want to configure a proxy to serve ACHE user interface from a **non-root**
+path, you will need to specify the path in ``ache.yml`` file using the following
+configuration::
+
+  http.base_path: /my-new-path
+
 API Endpoints
 -------------
 
diff --git a/src/main/java/focusedCrawler/rest/RestConfig.java b/src/main/java/focusedCrawler/rest/RestConfig.java
index 0879422a5..570610016 100644
--- a/src/main/java/focusedCrawler/rest/RestConfig.java
+++ b/src/main/java/focusedCrawler/rest/RestConfig.java
@@ -23,6 +23,9 @@ public class RestConfig {
     @JsonProperty("http.auth.basic.password")
     private String basicPassword = null;
 
+    @JsonProperty("http.base_path")
+    private String basePath = null;
+
     public RestConfig() {
         // required for de-serialization
     }
@@ -57,4 +60,8 @@ public String getBasicPassword() {
         return basicPassword;
     }
 
+    public String getBasePath() {
+        return basePath;
+    }
+
 }
diff --git a/src/main/java/focusedCrawler/rest/RestServer.java b/src/main/java/focusedCrawler/rest/RestServer.java
index 7df2fc229..1a3b2d0ec 100644
--- a/src/main/java/focusedCrawler/rest/RestServer.java
+++ b/src/main/java/focusedCrawler/rest/RestServer.java
@@ -34,7 +34,6 @@ public class RestServer {
     private ElasticsearchProxyResource elasticsearchProxyResource;
 
     private RestServer(String dataPath, Configuration config) {
-
         this.restConfig = config.getRestConfig();
         this.elasticsearchProxyResource = new ElasticsearchProxyResource(config);
         this.threadsResource = new ThreadsResource();
@@ -75,7 +74,7 @@ public void start() {
             "/search",
             "/monitoring"
         );
-        server.before("/*", new StaticFileHandlerFilter(indexes));
+        server.before("/*", new StaticFileHandlerFilter(indexes, restConfig.getBasePath()));
 
         /*
          * Enable HTTP CORS (Cross-origin Resource Sharing)
diff --git a/src/main/java/focusedCrawler/rest/StaticFileHandlerFilter.java b/src/main/java/focusedCrawler/rest/StaticFileHandlerFilter.java
index 8d297c201..454da6db4 100644
--- a/src/main/java/focusedCrawler/rest/StaticFileHandlerFilter.java
+++ b/src/main/java/focusedCrawler/rest/StaticFileHandlerFilter.java
@@ -24,8 +24,10 @@ public class StaticFileHandlerFilter implements Filter {
 
     private StaticFilesConfiguration staticFilesHandler;
     private Set<String> indexHtmlPaths;
+    private String basePath;
 
-    public StaticFileHandlerFilter(List<String> indexHtmlPaths) {
+    public StaticFileHandlerFilter(List<String> indexHtmlPaths, String basePath) {
+        this.basePath = basePath;
         this.staticFilesHandler = new StaticFilesConfiguration();
         this.staticFilesHandler.configure("/public");
         this.indexHtmlPaths = new HashSet<>(indexHtmlPaths);
@@ -48,6 +50,10 @@ private void renderIndexHtml(Request request, Response response) {
             String meta = String.format("<meta name=\"authorization\" content=\"%s\">", authHeader);
             indexHtml = indexHtml.replaceFirst("<head>", "<head>" + meta);
         }
+        if(basePath != null && !basePath.isEmpty()) {
+            String meta = String.format("<meta name=\"base_path\" content=\"%s\">", basePath);
+            indexHtml = indexHtml.replaceFirst("<head>", "<head>" + meta);
+        }
         writeResponse(request, response, indexHtml);
     }