| Brian Silverman | 8fce748 | 2020-01-05 13:18:21 -0800 | [diff] [blame^] | 1 | /*----------------------------------------------------------------------------*/ |
| 2 | /* Copyright (c) 2018 FIRST. All Rights Reserved. */ |
| 3 | /* Open Source Software - may be modified and shared by FRC teams. The code */ |
| 4 | /* must be accompanied by the FIRST BSD license file in the root directory of */ |
| 5 | /* the project. */ |
| 6 | /*----------------------------------------------------------------------------*/ |
| 7 | |
| 8 | #include <cstdio> |
| 9 | |
| 10 | #include "wpi/EventLoopRunner.h" |
| 11 | #include "wpi/HttpServerConnection.h" |
| 12 | #include "wpi/UrlParser.h" |
| 13 | #include "wpi/raw_ostream.h" |
| 14 | #include "wpi/uv/Loop.h" |
| 15 | #include "wpi/uv/Tcp.h" |
| 16 | |
| 17 | namespace uv = wpi::uv; |
| 18 | |
| 19 | class MyHttpServerConnection : public wpi::HttpServerConnection { |
| 20 | public: |
| 21 | explicit MyHttpServerConnection(std::shared_ptr<uv::Stream> stream) |
| 22 | : HttpServerConnection(stream) {} |
| 23 | |
| 24 | protected: |
| 25 | void ProcessRequest() override; |
| 26 | }; |
| 27 | |
| 28 | void MyHttpServerConnection::ProcessRequest() { |
| 29 | wpi::errs() << "HTTP request: '" << m_request.GetUrl() << "'\n"; |
| 30 | wpi::UrlParser url{m_request.GetUrl(), |
| 31 | m_request.GetMethod() == wpi::HTTP_CONNECT}; |
| 32 | if (!url.IsValid()) { |
| 33 | // failed to parse URL |
| 34 | SendError(400); |
| 35 | return; |
| 36 | } |
| 37 | |
| 38 | wpi::StringRef path; |
| 39 | if (url.HasPath()) path = url.GetPath(); |
| 40 | wpi::errs() << "path: \"" << path << "\"\n"; |
| 41 | |
| 42 | wpi::StringRef query; |
| 43 | if (url.HasQuery()) query = url.GetQuery(); |
| 44 | wpi::errs() << "query: \"" << query << "\"\n"; |
| 45 | |
| 46 | const bool isGET = m_request.GetMethod() == wpi::HTTP_GET; |
| 47 | if (isGET && path.equals("/")) { |
| 48 | // build HTML root page |
| 49 | wpi::SmallString<256> buf; |
| 50 | wpi::raw_svector_ostream os{buf}; |
| 51 | os << "<html><head><title>WebServer Example</title></head>"; |
| 52 | os << "<body><p>This is an example root page from the webserver."; |
| 53 | os << "</body></html>"; |
| 54 | SendResponse(200, "OK", "text/html", os.str()); |
| 55 | } else { |
| 56 | SendError(404, "Resource not found"); |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | int main() { |
| 61 | // Kick off the event loop on a separate thread |
| 62 | wpi::EventLoopRunner loop; |
| 63 | loop.ExecAsync([](uv::Loop& loop) { |
| 64 | auto tcp = uv::Tcp::Create(loop); |
| 65 | |
| 66 | // bind to listen address and port |
| 67 | tcp->Bind("", 8080); |
| 68 | |
| 69 | // when we get a connection, accept it and start reading |
| 70 | tcp->connection.connect([srv = tcp.get()] { |
| 71 | auto tcp = srv->Accept(); |
| 72 | if (!tcp) return; |
| 73 | wpi::errs() << "Got a connection\n"; |
| 74 | auto conn = std::make_shared<MyHttpServerConnection>(tcp); |
| 75 | tcp->SetData(conn); |
| 76 | }); |
| 77 | |
| 78 | // start listening for incoming connections |
| 79 | tcp->Listen(); |
| 80 | |
| 81 | wpi::errs() << "Listening on port 8080\n"; |
| 82 | }); |
| 83 | |
| 84 | // wait for a keypress to terminate |
| 85 | std::getchar(); |
| 86 | } |