Support Nextcloud installations in subfolders

net/sync/gpoddernet/build.gradle

@@ -12,4 +12,6 @@ dependencies {
     implementation "commons-io:commons-io:$commonsioVersion"
     implementation "io.reactivex.rxjava2:rxandroid:$rxAndroidVersion"
     implementation "io.reactivex.rxjava2:rxjava:$rxJavaVersion"
+
+    testImplementation "junit:junit:$junitVersion"
 }

net/sync/gpoddernet/src/main/java/de/danoeh/antennapod/net/sync/HostnameParser.java

@@ -1,5 +1,7 @@
 package de.danoeh.antennapod.net.sync;
 
+import org.apache.commons.lang3.StringUtils;
+
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -7,9 +9,10 @@ public class HostnameParser {
     public String scheme;
     public int port;
     public String host;
+    public String subfolder;
 
     // split into schema, host and port - missing parts are null
-    private static final Pattern URLSPLIT_REGEX = Pattern.compile("(?:(https?)://)?([^:]+)(?::(\\d+))?");
+    private static final Pattern URLSPLIT_REGEX = Pattern.compile("(?:(https?)://)?([^:/]+)(?::(\\d+))?(.+)?");
 
     public HostnameParser(String hosturl) {
         Matcher m = URLSPLIT_REGEX.matcher(hosturl);
@@ -21,6 +24,11 @@ public class HostnameParser {
             } else {
                 port = Integer.parseInt(m.group(3));    // regex -> can only be digits
             }
+            if (m.group(4) == null) {
+                subfolder = "";
+            } else {
+                subfolder = StringUtils.stripEnd(m.group(4), "/");
+            }
         } else {
             // URL does not match regex: use it anyway -> this will cause an exception on connect
             scheme = "https";
@@ -28,8 +36,10 @@ public class HostnameParser {
             port = 443;
         }
 
-        if (scheme == null) {      // assume https
-            scheme = "https";
+        if (scheme == null && port == 80) {
+            scheme = "http";
+        } else if (scheme == null) {
+            scheme = "https"; // assume https
         }
 
         if (scheme.equals("https") && port == -1) {

net/sync/gpoddernet/src/main/java/de/danoeh/antennapod/net/sync/nextcloud/NextcloudLoginFlow.java

@@ -46,7 +46,7 @@ public class NextcloudLoginFlow {
     public void start() {
         startDisposable = Observable.fromCallable(() -> {
             URL url = new URI(hostname.scheme, null, hostname.host, hostname.port,
-                    "/index.php/login/v2", null, null).toURL();
+                    hostname.subfolder + "/index.php/login/v2", null, null).toURL();
             JSONObject result = doRequest(url, "");
             String loginUrl = result.getString("login");
             this.token = result.getJSONObject("poll").getString("token");
@@ -93,9 +93,13 @@ public class NextcloudLoginFlow {
         Request request = new Request.Builder().url(url).method("POST", requestBody).build();
         Response response = httpClient.newCall(request).execute();
         if (response.code() != 200) {
+            response.close();
             throw new IOException("Return code " + response.code());
         }
         ResponseBody body = response.body();
+        if (body == null) {
+            throw new IOException("Empty response");
+        }
         return new JSONObject(body.string());
     }
 

net/sync/gpoddernet/src/main/java/de/danoeh/antennapod/net/sync/nextcloud/NextcloudSyncService.java

@@ -28,9 +28,7 @@ import java.util.List;
 public class NextcloudSyncService implements ISyncService {
     private static final int UPLOAD_BULK_SIZE = 30;
     private final OkHttpClient httpClient;
-    private final String baseScheme;
-    private final int basePort;
-    private final String baseHost;
+    private final HostnameParser hostname;
     private final String username;
     private final String password;
 
@@ -39,10 +37,7 @@ public class NextcloudSyncService implements ISyncService {
         this.httpClient = httpClient;
         this.username = username;
         this.password = password;
-        HostnameParser hostname = new HostnameParser(baseHosturl);
-        this.baseHost = hostname.host;
-        this.basePort = hostname.port;
-        this.baseScheme = hostname.scheme;
+        this.hostname = new HostnameParser(baseHosturl);
     }
 
     @Override
@@ -150,10 +145,10 @@ public class NextcloudSyncService implements ISyncService {
 
     private HttpUrl.Builder makeUrl(String path) {
         return new HttpUrl.Builder()
-                .scheme(baseScheme)
-                .host(baseHost)
-                .port(basePort)
-                .addPathSegments(path);
+                .scheme(hostname.scheme)
+                .host(hostname.host)
+                .port(hostname.port)
+                .addPathSegments(hostname.subfolder + path);
     }
 
     @Override

net/sync/gpoddernet/src/test/java/de/danoeh/antennapod/net/sync/HostnameParserTest.java

@@ -0,0 +1,43 @@
+package de.danoeh.antennapod.net.sync;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class HostnameParserTest {
+    @Test
+    public void testHostOnly() {
+        assertHostname(new HostnameParser("example.com"), "https", 443, "example.com", "");
+        assertHostname(new HostnameParser("www.example.com"), "https", 443, "www.example.com", "");
+    }
+
+    @Test
+    public void testHostAndPort() {
+        assertHostname(new HostnameParser("example.com:443"), "https", 443, "example.com", "");
+        assertHostname(new HostnameParser("example.com:80"), "http", 80, "example.com", "");
+        assertHostname(new HostnameParser("example.com:123"), "https", 123, "example.com", "");
+    }
+
+    @Test
+    public void testScheme() {
+        assertHostname(new HostnameParser("https://example.com"), "https", 443, "example.com", "");
+        assertHostname(new HostnameParser("https://example.com:80"), "https", 80, "example.com", "");
+        assertHostname(new HostnameParser("http://example.com"), "http", 80, "example.com", "");
+        assertHostname(new HostnameParser("http://example.com:443"), "http", 443, "example.com", "");
+    }
+
+    @Test
+    public void testSubfolder() {
+        assertHostname(new HostnameParser("https://example.com/"), "https", 443, "example.com", "");
+        assertHostname(new HostnameParser("https://example.com/a"), "https", 443, "example.com", "/a");
+        assertHostname(new HostnameParser("https://example.com/a/"), "https", 443, "example.com", "/a");
+        assertHostname(new HostnameParser("https://example.com:42/a"), "https", 42, "example.com", "/a");
+    }
+
+    private void assertHostname(HostnameParser parser, String scheme, int port, String host, String subfolder) {
+        assertEquals(scheme, parser.scheme);
+        assertEquals(port, parser.port);
+        assertEquals(host, parser.host);
+        assertEquals(subfolder, parser.subfolder);
+    }
+}