X-Git-Url: http://nitlanguage.org diff --git a/src/examples/nitlight_as_a_service.nit b/src/examples/nitlight_as_a_service.nit new file mode 100644 index 0000000..08d6980 --- /dev/null +++ b/src/examples/nitlight_as_a_service.nit @@ -0,0 +1,116 @@ +# This file is part of NIT ( http://www.nitlanguage.org ). +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +# This is an example of a client of the frontend without command-line processing. +# +# It offers a simple nitcorn web server that offers a textarea and nitpick and nitlignt it. +module nitlight_as_a_service + +import frontend +import highlight +import nitcorn +import nitcorn::log + +# Fully process a content as a nit source file. +fun hightlightcode(hl: HighlightVisitor, content: String): SourceFile +do + # Prepare a stand-alone tool context + var tc = new ToolContext + tc.nit_dir = tc.locate_nit_dir # still use the common lib to have core + tc.keep_going = true # no exit, obviously + tc.opt_warn.value = -1 # no output, obviously + + # Prepare an stand-alone model and model builder. + # Unfortunately, models are enclosing and append-only. + # There is no way (yet?) to have a shared module `core` with + # isolated and throwable user modules. + var model = new Model + var mb = new ModelBuilder(model, tc) + + # Parse the code + var source = new SourceFile.from_string("", content) + var lexer = new Lexer(source) + var parser = new Parser(lexer) + var tree = parser.parse + + # Check syntax error + var eof = tree.n_eof + if eof isa AError then + mb.error(eof, eof.message) + hl.hightlight_source(source) + return source + end + var amodule = tree.n_base.as(not null) + + # Load the AST as a module in the model + # Then process it + mb.load_rt_module(null, amodule, "") + mb.run_phases + + # Highlight the processed module + hl.enter_visit(amodule) + return source +end + +# Nitcorn service to hightlight code +# +# It's a single stand-alone page that has to form to itself. +class HighlightAction + super Action + + redef fun answer(http_request, turi) + do + var code = http_request.post_args.get_or_null("code") + + var hl = new HighlightVisitor + var page = "{hl.head_content}" + # Add the form+textarea + page += """ +

+ """ + + if code != null then + # There is code? Process it + var source = hightlightcode(hl, code) + + # Inject highlight + page += "
"
+			page += hl.html.write_to_string
+			page += "
" + page += "" + end + + page += hl.foot_content + + var response = new HttpResponse(200) + response.header["Content-Type"] = "text/html" + response.body = page + return response + end +end + +var host = "localhost:8080" +if args.length > 0 then host = args.first + +var vh = new VirtualHost(host) +vh.routes.add new Route("/", new HighlightAction) +var factory = new HttpFactory.and_libevent +factory.config.virtual_hosts.add vh +factory.run