Repository: solid/community-server
Pull request #21 (2020-07-10 12:53:01)

Set up server using express
This allows setting up the (very basic) Solid server using `node bin/server.js` (with optionally `-p port`). Until there is dependency injection this class also handles the linking of all the classes.

I looked into Koa and the implementation would pretty much be 100% the same due to so little express code being used. Since there already was a dependency on express through another dependency I went for that one.

Some changes from the architecture:
 - The constructor takes a single handler instead of an array. Currently didn't see the point of an array if we have `CompositeAsyncHandler`.
 - The `listen` function returns an `http.Server`, makes testing much easier and makes it more similar to the actual `listen` interface of `http.Server`.

Currently CORS is handled in the new server class. An `OptionOperationHandler` might be more in line with the rest of the architecture, but currently there is not really a clean way for such a handler to add headers to the output. I do think we will need this at some point so potentially this can be changed then.

I looked into making the server extend `http.Server` to be consistent with that interface, but then many more overloads for `listen` are necessary, and making everything work with express is going to be much more of a hassle since there you only get a Server object when you call the listen function.

This PR also fixed the identifier extraction and a bug in the `SimpleResourceStore`.

joachimvh: Latest push should fix most issues (except handle function returning a boolean, that will be for later).

I used the cors package now, but the allow-origin header still wasn't correct out of the box. By default it would always return `*` so I still had to add a line for that [here](https://github.com/solid/community-server/pull/21/files#diff-ea92bd35358bb95069d8aed78cbe905aR19). 

Patch:
diff --git a/bin/server.ts b/bin/server.ts
new file mode 100644
index 000000000..7928f876f
--- /dev/null
+++ b/bin/server.ts
@@ -0,0 +1,65 @@
+import yargs from 'yargs';
+import {
+  AcceptPreferenceParser,
+  AuthenticatedLdpHandler,
+  CompositeAsyncHandler,
+  ExpressHttpServer,
+  Operation,
+  ResponseDescription,
+  SimpleAuthorizer,
+  SimpleBodyParser,
+  SimpleCredentialsExtractor,
+  SimpleDeleteOperationHandler,
+  SimpleGetOperationHandler,
+  SimplePermissionsExtractor,
+  SimplePostOperationHandler,
+  SimpleRequestParser,
+  SimpleResourceStore,
+  SimpleResponseWriter,
+  SimpleTargetExtractor,
+} from '..';
+
+const { argv } = yargs
+  .usage('node ./bin/server.js [args]')
+  .options({
+    port: { type: 'number', alias: 'p', default: 3000 },
+  })
+  .help();
+
+const { port } = argv;
+
+// This is instead of the dependency injection that still needs to be added
+const requestParser = new SimpleRequestParser({
+  targetExtractor: new SimpleTargetExtractor(),
+  preferenceParser: new AcceptPreferenceParser(),
+  bodyParser: new SimpleBodyParser(),
+});
+
+const credentialsExtractor = new SimpleCredentialsExtractor();
+const permissionsExtractor = new SimplePermissionsExtractor();
+const authorizer = new SimpleAuthorizer();
+
+// Will have to see how to best handle this
+const store = new SimpleResourceStore(`http://localhost:${port}/`);
+const operationHandler = new CompositeAsyncHandler<Operation, ResponseDescription>([
+  new SimpleGetOperationHandler(store),
+  new SimplePostOperationHandler(store),
+  new SimpleDeleteOperationHandler(store),
+]);
+
+const responseWriter = new SimpleResponseWriter();
+
+const httpHandler = new AuthenticatedLdpHandler({
+  requestParser,
+  credentialsExtractor,
+  permissionsExtractor,
+  authorizer,
+  operationHandler,
+  responseWriter,
+});
+
+const httpServer = new ExpressHttpServer(httpHandler);
+
+httpServer.listen(port);
+
+process.stdout.write(`Running at http://localhost:${port}/\n`);
diff --git a/index.ts b/index.ts
new file mode 100644
index 000000000..cb5457909
--- /dev/null
+++ b/index.ts
@@ -0,0 +1,76 @@
+// Authentication
+export * from './src/authentication/Credentials';
+export * from './src/authentication/CredentialsExtractor';
+export * from './src/authentication/SimpleCredentialsExtractor';
+
+// Authorization
+export * from './src/authorization/Authorizer';
+export * from './src/authorization/SimpleAuthorizer';
+
+// LDP/HTTP
+export * from './src/ldp/http/AcceptPreferenceParser';
+export * from './src/ldp/http/BodyParser';
+export * from './src/ldp/http/Patch';
+export * from './src/ldp/http/PreferenceParser';
+export * from './src/ldp/http/RequestParser';
+export * from './src/ldp/http/ResponseWriter';
+export * from './src/ldp/http/SimpleBodyParser';
+export * from './src/ldp/http/SimpleRequestParser';
+export * from './src/ldp/http/SimpleResponseWriter';
+export * from './src/ldp/http/SimpleTargetExtractor';
+export * from './src/ldp/http/TargetExtractor';
+
+// LDP/Operations
+export * from './src/ldp/operations/Operation';
+export * from './src/ldp/operations/OperationHandler';
+export * from './src/ldp/operations/ResponseDescription';
+export * from './src/ldp/operations/SimpleDeleteOperationHandler';
+export * from './src/ldp/operations/SimpleGetOperationHandler';
+export * from './src/ldp/operations/SimplePostOperationHandler';
+
+// LDP/Permissions
+export * from './src/ldp/permissions/PermissionSet';
+export * from './src/ldp/permissions/PermissionsExtractor';
+export * from './src/ldp/permissions/SimplePermissionsExtractor';
+
+// LDP/Representation
+export * from './src/ldp/representation/BinaryRepresentation';
+export * from './src/ldp/representation/NamedRepresentation';
+export * from './src/ldp/representation/QuadRepresentation';
+export * from './src/ldp/representation/Representation';
+export * from './src/ldp/representation/RepresentationMetadata';
+export * from './src/ldp/representation/RepresentationPreference';
+export * from './src/ldp/representation/RepresentationPreferences';
+export * from './src/ldp/representation/ResourceIdentifier';
+
+// LDP
+export * from './src/ldp/AuthenticatedLdpHandler';
+
+// Server
+export * from './src/server/ExpressHttpServer';
+export * from './src/server/HttpHandler';
+export * from './src/server/HttpRequest';
+export * from './src/server/HttpResponse';
+
+// Storage
+export * from './src/storage/AtomicResourceStore';
+export * from './src/storage/Conditions';
+export * from './src/storage/Lock';
+export * from './src/storage/RepresentationConverter';
+export * from './src/storage/ResourceLocker';
+export * from './src/storage/ResourceMapper';
+export * from './src/storage/ResourceStore';
+export * from './src/storage/SimpleResourceStore';
+
+// Util/Errors
+export * from './src/util/errors/HttpError';
+export * from './src/util/errors/NotFoundHttpError';
+export * from './src/util/errors/UnsupportedHttpError';
+export * from './src/util/errors/UnsupportedMediaTypeHttpError';
+
+// Util
+export * from './src/util/AcceptParser';
+export * from './src/util/AsyncHandler';
+export * from './src/util/CompositeAsyncHandler';
+export * from './src/util/TypedReadable';
+export * from './src/util/Util';
diff --git a/package-lock.json b/package-lock.json
index 9f7488e69..0026b9748 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -681,6 +681,12 @@
         }
       }
     },
+    "@sindresorhus/is": {
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+    },
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@@ -699,6 +705,15 @@
         "@sinonjs/commons": "^1.7.0"
       }
     },
+    "@szmarczak/http-timer": {
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+      "dev": true,
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+      }
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-      "dev": true
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-      "dev": true,
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         "@types/node": "*"
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+    "@types/cookiejar": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/@types/cookiejar/-/cookiejar-2.1.1.tgz",
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+      "dev": true
+    },
+    "@types/cors": {
+      "version": "2.8.6",
+      "resolved": "https://registry.npmjs.org/@types/cors/-/cors-2.8.6.tgz",
+      "integrity": "sha512-invOmosX0DqbpA+cE2yoHGUlF/blyf7nB0OGYBBiH27crcVm5NmFaZkLP4Ta1hGaesckCi5lVLlydNJCxkTOSg==",
+      "requires": {
+        "@types/express": "*"
+      }
+    },
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       "version": "1.0.0",
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@@ -796,7 +821,6 @@
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@@ -916,8 +940,7 @@
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@@ -996,11 +1016,29 @@
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+      "resolved": "https://registry.npmjs.org/@types/superagent/-/superagent-4.1.8.tgz",
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       "dev": true,
+      "requires": {
+        "@types/cookiejar": "*",
+        "@types/node": "*"
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+      "dev": true,
+      "requires": {
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+      }
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@@ -1126,6 +1168,55 @@
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+          "requires": {
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+          "requires": {
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@@ -1196,6 +1285,11 @@
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+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/unique-string/-/unique-string-2.0.0.tgz",
+      "integrity": "sha512-uNaeirEPvpZWSgzwsPGtU2zVSTrn/8L5q/IexZmH0eH6SA73CmAA5U4GwORTxQAZs95TAXLNqeLoPPNO5gZfWg==",
+      "dev": true,
+      "requires": {
+        "crypto-random-string": "^2.0.0"
+      }
+    },
+    "unpipe": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
+      "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
+    },
     "unset-value": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/unset-value/-/unset-value-1.0.0.tgz",
@@ -6230,6 +7239,39 @@
         }
       }
     },
+    "update-notifier": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/update-notifier/-/update-notifier-4.1.0.tgz",
+      "integrity": "sha512-w3doE1qtI0/ZmgeoDoARmI5fjDoT93IfKgEGqm26dGUOh8oNpaSTsGNdYRN/SjOuo10jcJGwkEL3mroKzktkew==",
+      "dev": true,
+      "requires": {
+        "boxen": "^4.2.0",
+        "chalk": "^3.0.0",
+        "configstore": "^5.0.1",
+        "has-yarn": "^2.1.0",
+        "import-lazy": "^2.1.0",
+        "is-ci": "^2.0.0",
+        "is-installed-globally": "^0.3.1",
+        "is-npm": "^4.0.0",
+        "is-yarn-global": "^0.3.0",
+        "latest-version": "^5.0.0",
+        "pupa": "^2.0.1",
+        "semver-diff": "^3.1.1",
+        "xdg-basedir": "^4.0.0"
+      },
+      "dependencies": {
+        "chalk": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-3.0.0.tgz",
+          "integrity": "sha512-4D3B6Wf41KOYRFdszmDqMCGq5VV/uMAB273JILmO+3jAlh8X4qDtdtgCR3fxtbLEMzSx22QdhnDcJvu2u1fVwg==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^4.1.0",
+            "supports-color": "^7.1.0"
+          }
+        }
+      }
+    },
     "uri-js": {
       "version": "4.2.2",
       "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
@@ -6245,12 +7287,32 @@
       "integrity": "sha1-2pN/emLiH+wf0Y1Js1wpNQZ6bHI=",
       "dev": true
     },
+    "url-parse-lax": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/url-parse-lax/-/url-parse-lax-3.0.0.tgz",
+      "integrity": "sha1-FrXK/Afb42dsGxmZF3gj1lA6yww=",
+      "dev": true,
+      "requires": {
+        "prepend-http": "^2.0.0"
+      }
+    },
     "use": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/use/-/use-3.1.1.tgz",
       "integrity": "sha512-cwESVXlO3url9YWlFW/TA9cshCEhtu7IKJ/p5soJ/gGpj7vbvFrAY/eIioQ6Dw23KjZhYgiIo8HOs1nQ2vr/oQ==",
       "dev": true
     },
+    "util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
+      "dev": true
+    },
+    "utils-merge": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
+    },
     "uuid": {
       "version": "7.0.3",
       "resolved": "https://registry.npmjs.org/uuid/-/uuid-7.0.3.tgz",
@@ -6299,6 +7361,11 @@
       "integrity": "sha1-33lplSuIL20BH4UCnhOyyD5yEVg=",
       "dev": true
     },
+    "vary": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
+    },
     "verror": {
       "version": "1.10.0",
       "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
@@ -6389,8 +7456,7 @@
     "which-module": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
-      "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=",
-      "dev": true
+      "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho="
     },
     "which-pm-runs": {
       "version": "1.0.0",
@@ -6398,6 +7464,15 @@
       "integrity": "sha1-Zws6+8VS4LVd9rd4DKdGFfI60cs=",
       "dev": true
     },
+    "widest-line": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/widest-line/-/widest-line-3.1.0.tgz",
+      "integrity": "sha512-NsmoXalsWVDMGupxZ5R08ka9flZjjiLvHVAWYOKtiKM8ujtZWr9cRffak+uSE48+Ob8ObalXpwyeUiyDD6QFgg==",
+      "dev": true,
+      "requires": {
+        "string-width": "^4.0.0"
+      }
+    },
     "word-wrap": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
@@ -6408,7 +7483,6 @@
       "version": "6.2.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-6.2.0.tgz",
       "integrity": "sha512-r6lPcBGxZXlIcymEu7InxDMhdW0KDxpLgoFLcguasxCaJ/SOIZwINatK9KY/tf+ZrlywOKU0UDj3ATXUBfxJXA==",
-      "dev": true,
       "requires": {
         "ansi-styles": "^4.0.0",
         "string-width": "^4.1.0",
@@ -6448,6 +7522,12 @@
       "integrity": "sha512-iFtXzngZVXPGgpTlP1rBqsUK82p9tKqsWRPg5L56egiljujJT3vGAYnHANvFxBieXrTFavhzhxW52jnaWV+w2w==",
       "dev": true
     },
+    "xdg-basedir": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/xdg-basedir/-/xdg-basedir-4.0.0.tgz",
+      "integrity": "sha512-PSNhEJDejZYV7h50BohL09Er9VaIefr2LMAf3OEmpCkjOi34eYyQYAXUTjEQtZJTKcF0E2UKTh+osDLsgNim9Q==",
+      "dev": true
+    },
     "xml-name-validator": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-3.0.0.tgz",
@@ -6472,8 +7552,7 @@
     "y18n": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
-      "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
-      "dev": true
+      "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w=="
     },
     "yaml": {
       "version": "1.10.0",
@@ -6482,10 +7561,9 @@
       "dev": true
     },
     "yargs": {
-      "version": "15.3.1",
-      "resolved": "https://registry.npmjs.org/yargs/-/yargs-15.3.1.tgz",
-      "integrity": "sha512-92O1HWEjw27sBfgmXiixJWT5hRBp2eobqXicLtPBIDBhYB+1HpwZlXmbW2luivBJHBzki+7VyCLRtAkScbTBQA==",
-      "dev": true,
+      "version": "15.4.1",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-15.4.1.tgz",
+      "integrity": "sha512-aePbxDmcYW++PaqBsJ+HYUFwCdv4LVvdnhBy78E57PIor8/OVvhMrADFFEDh8DHDFRv/O9i3lPhsENjO7QX0+A==",
       "requires": {
         "cliui": "^6.0.0",
         "decamelize": "^1.2.0",
@@ -6497,14 +7575,13 @@
         "string-width": "^4.2.0",
         "which-module": "^2.0.0",
         "y18n": "^4.0.0",
-        "yargs-parser": "^18.1.1"
+        "yargs-parser": "^18.1.2"
       }
     },
     "yargs-parser": {
       "version": "18.1.3",
       "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-18.1.3.tgz",
       "integrity": "sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==",
-      "dev": true,
       "requires": {
         "camelcase": "^5.0.0",
         "decamelize": "^1.2.0"
diff --git a/package.json b/package.json
index 2df5e72f7..af7ff1021 100644
--- a/package.json
+++ b/package.json
@@ -4,11 +4,14 @@
   "version": "0.0.1",
   "main": "index.js",
   "license": "MIT",
+  "bin": "bin/server.js",
   "scripts": {
     "build": "tsc",
     "coveralls": "jest --coverage && cat ./coverage/lcov.info | coveralls",
     "lint": "eslint . --ext .ts",
-    "test": "jest"
+    "start": "node ./bin/server.js -p 3000",
+    "test": "jest",
+    "watch": "nodemon --watch \"src/**/*.js\" --watch \"bin/**/*.js\" --exec npm start"
   },
   "husky": {
     "hooks": {
@@ -18,21 +21,29 @@
   "files": [
     "index.js",
     "index.d.ts",
+    "bin/*.js",
+    "bin/*.d.ts",
     "src/**/*.js",
     "src/**/*.d.ts"
   ],
   "dependencies": {
     "@rdfjs/data-model": "^1.1.2",
+    "@types/cors": "^2.8.6",
+    "@types/express": "^4.17.6",
     "@types/n3": "^1.4.0",
     "@types/node": "^14.0.1",
     "@types/rdf-js": "^3.0.0",
-    "n3": "^1.4.0"
+    "@types/yargs": "^15.0.5",
+    "cors": "^2.8.5",
+    "express": "^4.17.1",
+    "n3": "^1.4.0",
+    "yargs": "^15.4.1"
   },
   "devDependencies": {
     "@types/arrayify-stream": "^1.0.0",
-    "@types/express": "^4.17.6",
     "@types/jest": "^25.2.1",
     "@types/streamify-array": "^1.0.0",
+    "@types/supertest": "^2.0.10",
     "@typescript-eslint/eslint-plugin": "^2.33.0",
     "@typescript-eslint/parser": "^2.33.0",
     "arrayify-stream": "^1.0.0",
@@ -44,7 +55,9 @@
     "jest": "^26.0.1",
     "jest-rdf": "^1.5.0",
     "node-mocks-http": "^1.8.1",
+    "nodemon": "^2.0.4",
     "streamify-array": "^1.0.1",
+    "supertest": "^4.0.2",
     "ts-jest": "^26.0.0",
     "typescript": "^3.9.2"
   }
diff --git a/src/ldp/http/SimpleTargetExtractor.ts b/src/ldp/http/SimpleTargetExtractor.ts
index 27903e6ca..60320305f 100644
--- a/src/ldp/http/SimpleTargetExtractor.ts
+++ b/src/ldp/http/SimpleTargetExtractor.ts
@@ -1,6 +1,8 @@
+import { format } from 'url';
 import { HttpRequest } from '../../server/HttpRequest';
 import { ResourceIdentifier } from '../representation/ResourceIdentifier';
 import { TargetExtractor } from './TargetExtractor';
+import { TLSSocket } from 'tls';
 
 /**
  * Extracts an identifier from an incoming {@link HttpRequest}.
@@ -14,6 +16,13 @@ export class SimpleTargetExtractor extends TargetExtractor {
   }
 
   public async handle(input: HttpRequest): Promise<ResourceIdentifier> {
-    return { path: input.url };
+    const isHttps = input.connection && (input.connection as TLSSocket).encrypted;
+    const url = format({
+      protocol: `http${isHttps ? 's' : ''}`,
+      host: input.headers.host,
+      pathname: input.url,
+    });
+
+    return { path: url };
   }
 }
diff --git a/src/server/ExpressHttpServer.ts b/src/server/ExpressHttpServer.ts
new file mode 100644
index 000000000..488f1f8b8
--- /dev/null
+++ b/src/server/ExpressHttpServer.ts
@@ -0,0 +1,28 @@
+import cors from 'cors';
+import express from 'express';
+import { HttpHandler } from './HttpHandler';
+import { Server } from 'http';
+
+export class ExpressHttpServer {
+  private readonly handler: HttpHandler;
+
+  public constructor(handler: HttpHandler) {
+    this.handler = handler;
+  }
+
+  public listen(port?: number): Server {
+    const app = express();
+
+    app.use(cors({
+      // Based on https://github.com/solid/solid-spec/blob/master/recommendations-server.md#cors---cross-origin-resource-sharing
+      // By default origin is always '*', this forces it to be the origin header if there is one
+      origin: (origin, callback): void => callback(null, (origin || '*') as any),
+      methods: [ 'GET', 'HEAD', 'OPTIONS', 'POST', 'PUT', 'PATCH', 'DELETE' ],
+    }));
+
+    app.use(async(request, response): Promise<void> => {
+      await this.handler.handleSafe({ request, response });
+    });
+    return app.listen(port);
+  }
+}
diff --git a/src/storage/SimpleResourceStore.ts b/src/storage/SimpleResourceStore.ts
index d2f6e5b70..f29228530 100644
--- a/src/storage/SimpleResourceStore.ts
+++ b/src/storage/SimpleResourceStore.ts
@@ -1,5 +1,6 @@
 import arrayifyStream from 'arrayify-stream';
 import { BinaryRepresentation } from '../ldp/representation/BinaryRepresentation';
+import { ensureTrailingSlash } from '../util/Util';
 import { NotFoundHttpError } from '../util/errors/NotFoundHttpError';
 import { Quad } from 'rdf-js';
 import { QuadRepresentation } from '../ldp/representation/QuadRepresentation';
@@ -11,43 +12,89 @@ import streamifyArray from 'streamify-array';
 import { StreamWriter } from 'n3';
 import { UnsupportedMediaTypeHttpError } from '../util/errors/UnsupportedMediaTypeHttpError';
 
+/**
+ * Resource store storing its data as Quads in an in-memory map.
+ * All requests will throw an {@link NotFoundHttpError} if unknown identifiers get passed.
+ */
 export class SimpleResourceStore implements ResourceStore {
   private readonly store: { [id: string]: Quad[] } = { '': []};
   private readonly base: string;
   private index = 0;
 
+  /**
+   * @param base - Will be stripped of all incoming URIs and added to all outgoing ones to find the relative path.
+   */
   public constructor(base: string) {
     this.base = base;
   }
 
+  /**
+   * Stores the incoming data under a new URL corresponding to `container.path + number`.
+   * Slash added when needed.
+   * @param container - The identifier to store the new data under.
+   * @param representation - Data to store. Only Quad streams are supported.
+   *
+   * @returns The newly generated identifier.
+   */
   public async addResource(container: ResourceIdentifier, representation: Representation): Promise<ResourceIdentifier> {
     const containerPath = this.parseIdentifier(container);
-    const newPath = `${containerPath}/${this.index}`;
+    const newPath = `${ensureTrailingSlash(containerPath)}${this.index}`;
     this.index += 1;
     this.store[newPath] = await this.parseRepresentation(representation);
     return { path: `${this.base}${newPath}` };
   }
 
+  /**
+   * Deletes the given resource.
+   * @param identifier - Identifier of resource to delete.
+   */
   public async deleteResource(identifier: ResourceIdentifier): Promise<void> {
     const path = this.parseIdentifier(identifier);
     // eslint-disable-next-line @typescript-eslint/no-dynamic-delete
     delete this.store[path];
   }
 
+  /**
+   * Returns the stored representation for the given identifier.
+   * The only preference that is supported is `type === 'text/turtle'`.
+   * In all other cases a stream of Quads will be returned.
+   *
+   * @param identifier - Identifier to retrieve.
+   * @param preferences - Preferences for resulting Representation.
+   *
+   * @returns The corresponding Representation.
+   */
   public async getRepresentation(identifier: ResourceIdentifier, preferences: RepresentationPreferences): Promise<Representation> {
     const path = this.parseIdentifier(identifier);
     return this.generateRepresentation(this.store[path], preferences);
   }
 
+  /**
+   * @throws Not supported.
+   */
   public async modifyResource(): Promise<void> {
     throw new Error('Not supported.');
   }
 
+  /**
+   * Replaces the stored Representation with the new one for the given identifier.
+   * @param identifier - Identifier to replace.
+   * @param representation - New Representation.
+   */
   public async setRepresentation(identifier: ResourceIdentifier, representation: Representation): Promise<void> {
     const path = this.parseIdentifier(identifier);
     this.store[path] = await this.parseRepresentation(representation);
   }
 
+  /**
+   * Strips the base from the identifier and checks if it is in the store.
+   * @param identifier - Incoming identifier.
+   *
+   * @throws {@link NotFoundHttpError}
+   * If the identifier is not in the store.
+   *
+   * @returns A string representing the relative path.
+   */
   private parseIdentifier(identifier: ResourceIdentifier): string {
     const path = identifier.path.slice(this.base.length);
     if (!this.store[path] || !identifier.path.startsWith(this.base)) {
@@ -56,6 +103,14 @@ export class SimpleResourceStore implements ResourceStore {
     return path;
   }
 
+  /**
+   * Converts the Representation to an array of Quads.
+   * @param representation - Incoming Representation.
+   * @throws {@link UnsupportedMediaTypeHttpError}
+   * If the representation is not a Quad stream.
+   *
+   * @returns Promise of array of Quads pulled from the stream.
+   */
   private async parseRepresentation(representation: Representation): Promise<Quad[]> {
     if (representation.dataType !== 'quad') {
       throw new UnsupportedMediaTypeHttpError('SimpleResourceStore only supports quad representations.');
@@ -63,6 +118,15 @@ export class SimpleResourceStore implements ResourceStore {
     return arrayifyStream(representation.data);
   }
 
+  /**
+   * Converts an array of Quads to a Representation.
+   * If preferences.type contains 'text/turtle' the result will be a stream of turtle strings,
+   * otherwise a stream of Quads.
+   * @param data - Quads to transform.
+   * @param preferences - Requested preferences.
+   *
+   * @returns The resulting Representation.
+   */
   private generateRepresentation(data: Quad[], preferences: RepresentationPreferences): Representation {
     if (preferences.type && preferences.type.some((preference): boolean => preference.value.includes('text/turtle'))) {
       return this.generateBinaryRepresentation(data);
@@ -70,18 +134,30 @@ export class SimpleResourceStore implements ResourceStore {
     return this.generateQuadRepresentation(data);
   }
 
+  /**
+   * Creates a {@link BinaryRepresentation} of the incoming Quads.
+   * @param data - Quads to transform to text/turtle.
+   *
+   * @returns The resulting binary Representation.
+   */
   private generateBinaryRepresentation(data: Quad[]): BinaryRepresentation {
     return {
       dataType: 'binary',
-      data: streamifyArray(data).pipe(new StreamWriter({ format: 'text/turtle' })),
+      data: streamifyArray([ ...data ]).pipe(new StreamWriter({ format: 'text/turtle' })),
       metadata: { raw: [], profiles: [], contentType: 'text/turtle' },
     };
   }
 
+  /**
+   * Creates a {@link QuadRepresentation} of the incoming Quads.
+   * @param data - Quads to transform to a stream of Quads.
+   *
+   * @returns The resulting quad Representation.
+   */
   private generateQuadRepresentation(data: Quad[]): QuadRepresentation {
     return {
       dataType: 'quad',
-      data: streamifyArray(data),
+      data: streamifyArray([ ...data ]),
       metadata: { raw: [], profiles: []},
     };
   }
diff --git a/src/util/Util.ts b/src/util/Util.ts
new file mode 100644
index 000000000..0083ed726
--- /dev/null
+++ b/src/util/Util.ts
@@ -0,0 +1,10 @@
+/**
+ * Makes sure the input path has exactly 1 slash at the end.
+ * Multiple slashes will get merged into one.
+ * If there is no slash it will be added.
+ *
+ * @param path - Path to check.
+ *
+ * @returns The potentially changed path.
+ */
+export const ensureTrailingSlash = (path: string): string => path.replace(/\/*$/u, '/');
diff --git a/tsconfig.json b/tsconfig.json
index c0bd752b2..2cc56f155 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -15,6 +15,8 @@
     "stripInternal": true
   },
   "include": [
+    "index.ts",
+    "bin/**/*.ts",
     "src/**/*.ts",
     "test/**/*.ts"
   ],


Test patch:
diff --git a/test/integration/AuthenticatedLdpHandler.test.ts b/test/integration/AuthenticatedLdpHandler.test.ts
index 25069ac72..233bcf5d6 100644
--- a/test/integration/AuthenticatedLdpHandler.test.ts
+++ b/test/integration/AuthenticatedLdpHandler.test.ts
@@ -18,6 +18,7 @@ import { SimpleResponseWriter } from '../../src/ldp/http/SimpleResponseWriter';
 import { SimpleTargetExtractor } from '../../src/ldp/http/SimpleTargetExtractor';
 import streamifyArray from 'streamify-array';
 import { createResponse, MockResponse } from 'node-mocks-http';
+import * as url from 'url';
 
 describe('An AuthenticatedLdpHandler with instantiated handlers', (): void => {
   let handler: AuthenticatedLdpHandler;
@@ -54,11 +55,13 @@ describe('An AuthenticatedLdpHandler with instantiated handlers', (): void => {
 
   it('can add, read and delete data based on incoming requests.', async(): Promise<void> => {
     // POST
+    let requestUrl = new url.URL('http://test.com/');
     let request = streamifyArray([ '<http://test.com/s> <http://test.com/p> <http://test.com/o>.' ]) as HttpRequest;
-    request.url = 'http://test.com/';
+    request.url = requestUrl.pathname;
     request.method = 'POST';
     request.headers = {
       'content-type': 'text/turtle',
+      host: requestUrl.host,
     };
     let response: MockResponse<any> = createResponse({ eventEmitter: EventEmitter });
 
@@ -69,7 +72,7 @@ describe('An AuthenticatedLdpHandler with instantiated handlers', (): void => {
         expect(response.statusCode).toBe(200);
         expect(response._getData()).toHaveLength(0);
         id = response._getHeaders().location;
-        expect(id).toContain(request.url);
+        expect(id).toContain(url.format(requestUrl));
         resolve();
       });
     });
@@ -78,11 +81,13 @@ describe('An AuthenticatedLdpHandler with instantiated handlers', (): void => {
     await endPromise;
 
     // GET
+    requestUrl = new url.URL(id);
     request = {} as HttpRequest;
-    request.url = id;
+    request.url = requestUrl.pathname;
     request.method = 'GET';
     request.headers = {
       accept: 'text/turtle',
+      host: requestUrl.host,
     };
     response = createResponse({ eventEmitter: EventEmitter });
 
@@ -91,7 +96,7 @@ describe('An AuthenticatedLdpHandler with instantiated handlers', (): void => {
         expect(response._isEndCalled()).toBeTruthy();
         expect(response.statusCode).toBe(200);
         expect(response._getData()).toContain('<http://test.com/s> <http://test.com/p> <http://test.com/o>.');
-        expect(response._getHeaders().location).toBe(request.url);
+        expect(response._getHeaders().location).toBe(url.format(requestUrl));
         resolve();
       });
     });
@@ -101,9 +106,11 @@ describe('An AuthenticatedLdpHandler with instantiated handlers', (): void => {
 
     // DELETE
     request = {} as HttpRequest;
-    request.url = id;
+    request.url = requestUrl.pathname;
     request.method = 'DELETE';
-    request.headers = {};
+    request.headers = {
+      host: requestUrl.host,
+    };
     response = createResponse({ eventEmitter: EventEmitter });
 
     endPromise = new Promise((resolve): void => {
@@ -111,7 +118,7 @@ describe('An AuthenticatedLdpHandler with instantiated handlers', (): void => {
         expect(response._isEndCalled()).toBeTruthy();
         expect(response.statusCode).toBe(200);
         expect(response._getData()).toHaveLength(0);
-        expect(response._getHeaders().location).toBe(request.url);
+        expect(response._getHeaders().location).toBe(url.format(requestUrl));
         resolve();
       });
     });
@@ -121,10 +128,11 @@ describe('An AuthenticatedLdpHandler with instantiated handlers', (): void => {
 
     // GET
     request = {} as HttpRequest;
-    request.url = id;
+    request.url = requestUrl.pathname;
     request.method = 'GET';
     request.headers = {
       accept: 'text/turtle',
+      host: requestUrl.host,
     };
     response = createResponse({ eventEmitter: EventEmitter });
 
diff --git a/test/integration/RequestParser.test.ts b/test/integration/RequestParser.test.ts
index d631b511f..dcc156cdf 100644
--- a/test/integration/RequestParser.test.ts
+++ b/test/integration/RequestParser.test.ts
@@ -17,11 +17,12 @@ describe('A SimpleRequestParser with simple input parsers', (): void => {
   it('can parse an incoming request.', async(): Promise<void> => {
     const request = streamifyArray([ '<http://test.com/s> <http://test.com/p> <http://test.com/o>.' ]) as HttpRequest;
     request.method = 'POST';
-    request.url = 'http://test.com/';
+    request.url = '/';
     request.headers = {
       accept: 'text/turtle; q=0.8',
       'accept-language': 'en-gb, en;q=0.5',
       'content-type': 'text/turtle',
+      host: 'test.com',
     };
 
     const result = await requestParser.handle(request);
diff --git a/test/unit/ldp/http/SimpleTargetExtractor.test.ts b/test/unit/ldp/http/SimpleTargetExtractor.test.ts
index de9406277..112db596e 100644
--- a/test/unit/ldp/http/SimpleTargetExtractor.test.ts
+++ b/test/unit/ldp/http/SimpleTargetExtractor.test.ts
@@ -12,6 +12,11 @@ describe('A SimpleTargetExtractor', (): void => {
   });
 
   it('returns the input URL.', async(): Promise<void> => {
-    await expect(extractor.handle({ url: 'url' } as any)).resolves.toEqual({ path: 'url' });
+    await expect(extractor.handle({ url: 'url', headers: { host: 'test.com' }} as any)).resolves.toEqual({ path: 'http://test.com/url' });
+  });
+
+  it('uses https protocol if the connection is secure.', async(): Promise<void> => {
+    await expect(extractor.handle({ url: 'url', headers: { host: 'test.com' }, connection: { encrypted: true } as any } as any))
+      .resolves.toEqual({ path: 'https://test.com/url' });
   });
 });
diff --git a/test/unit/server/ExpressHttpServer.test.ts b/test/unit/server/ExpressHttpServer.test.ts
new file mode 100644
index 000000000..a48c9619b
--- /dev/null
+++ b/test/unit/server/ExpressHttpServer.test.ts
@@ -0,0 +1,77 @@
+import { ExpressHttpServer } from '../../../src/server/ExpressHttpServer';
+import { HttpHandler } from '../../../src/server/HttpHandler';
+import { HttpRequest } from '../../../src/server/HttpRequest';
+import { HttpResponse } from '../../../src/server/HttpResponse';
+import request from 'supertest';
+import { Server } from 'http';
+
+const handle = async(input: { request: HttpRequest; response: HttpResponse }): Promise<void> => {
+  input.response.writeHead(200);
+  input.response.end();
+};
+
+class SimpleHttpHandler extends HttpHandler {
+  public async canHandle(): Promise<void> {
+    return undefined;
+  }
+
+  public async handle(input: { request: HttpRequest; response: HttpResponse }): Promise<void> {
+    return handle(input);
+  }
+}
+
+describe('ExpressHttpServer', (): void => {
+  let server: Server;
+  let canHandleJest: jest.Mock<Promise<void>, []>;
+  let handleJest: jest.Mock<Promise<void>, [any]>;
+  beforeEach(async(): Promise<void> => {
+    const handler = new SimpleHttpHandler();
+    canHandleJest = jest.fn(async(): Promise<void> => undefined);
+    handleJest = jest.fn(async(input): Promise<void> => handle(input));
+
+    handler.canHandle = canHandleJest;
+    handler.handle = handleJest;
+
+    const expressServer = new ExpressHttpServer(handler);
+    server = expressServer.listen();
+  });
+
+  afterEach(async(): Promise<void> => {
+    // Close server
+    server.close();
+  });
+
+  it('returns CORS headers for an OPTIONS request.', async(): Promise<void> => {
+    const res = await request(server)
+      .options('/')
+      .set('Access-Control-Request-Headers', 'content-type')
+      .set('Access-Control-Request-Method', 'POST')
+      .set('Host', 'test.com')
+      .expect(204);
+    expect(res.header).toEqual(expect.objectContaining({
+      'access-control-allow-origin': '*',
+      'access-control-allow-headers': 'content-type',
+    }));
+    const corsMethods = res.header['access-control-allow-methods'].split(',').map((method: string): string => method.trim());
+    const allowedMethods = [ 'GET', 'HEAD', 'OPTIONS', 'POST', 'PUT', 'PATCH', 'DELETE' ];
+    expect(corsMethods).toEqual(expect.arrayContaining(allowedMethods));
+    expect(corsMethods.length).toBe(allowedMethods.length);
+  });
+
+  it('specifies CORS origin header if an origin was supplied.', async(): Promise<void> => {
+    const res = await request(server).get('/').set('origin', 'test.com').expect(200);
+    expect(res.header).toEqual(expect.objectContaining({ 'access-control-allow-origin': 'test.com' }));
+  });
+
+  it('sends incoming requests to the handler.', async(): Promise<void> => {
+    await request(server).get('/').set('Host', 'test.com').expect(200);
+    expect(canHandleJest).toHaveBeenCalledTimes(1);
+    expect(handleJest).toHaveBeenCalledTimes(1);
+    expect(handleJest).toHaveBeenLastCalledWith({
+      request: expect.objectContaining({
+        headers: expect.objectContaining({ host: 'test.com' }),
+      }),
+      response: expect.objectContaining({}),
+    });
+  });
+});
diff --git a/test/unit/storage/SimpleResourceStore.test.ts b/test/unit/storage/SimpleResourceStore.test.ts
index 2ece75f2f..e7ac21852 100644
--- a/test/unit/storage/SimpleResourceStore.test.ts
+++ b/test/unit/storage/SimpleResourceStore.test.ts
@@ -59,6 +59,13 @@ describe('A SimpleResourceStore', (): void => {
     await expect(arrayifyStream(result.data)).resolves.toEqualRdfQuadArray([ quad ]);
   });
 
+  it('can add resources to previously added resources.', async(): Promise<void> => {
+    const identifier = await store.addResource({ path: base }, representation);
+    representation.data = streamifyArray([ quad ]);
+    const childIdentifier = await store.addResource(identifier, representation);
+    expect(childIdentifier.path).toContain(identifier.path);
+  });
+
   it('can read binary data.', async(): Promise<void> => {
     const identifier = await store.addResource({ path: base }, representation);
     expect(identifier.path.startsWith(base)).toBeTruthy();