New HTTP server

src/System/HttpParser.cpp

@@ -0,0 +1,215 @@
+// Copyright (c) 2012-2014, The CryptoNote developers, The Bytecoin developers
+//
+// This file is part of Bytecoin.
+//
+// Bytecoin is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Bytecoin is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with Bytecoin.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "HttpParser.h"
+
+#include <stdexcept>
+
+namespace cryptonote {
+
+HttpResponse::HTTP_STATUS HttpParser::parseResponseStatusFromString(const std::string& status) {
+  if (status == "200 OK" || status == "200 Ok") return cryptonote::HttpResponse::STATUS_200;
+  else if (status == "404 Not Found") return cryptonote::HttpResponse::STATUS_404;
+  else if (status == "500 Internal Server Error") return cryptonote::HttpResponse::STATUS_500;
+  else throw std::runtime_error("Unknown HTTP status code is given");
+
+  return cryptonote::HttpResponse::STATUS_200; //unaccessible
+}
+
+
+void HttpParser::receiveRequest(std::istream& stream, HttpRequest& request) {
+  readWord(stream, request.method);
+  readWord(stream, request.url);
+
+  std::string httpVersion;
+  readWord(stream, httpVersion);
+
+  readHeaders(stream, request.headers);
+
+  std::string body;
+  size_t bodyLen = getBodyLen(request.headers);
+  if (bodyLen) {
+    readBody(stream, request.body, bodyLen);
+  }
+}
+
+
+void HttpParser::receiveResponse(std::istream& stream, HttpResponse& response) {
+  std::string httpVersion;
+  readWord(stream, httpVersion);
+
+  std::string status;
+  char c;
+
+  stream.get(c);
+  while (stream.good() && c != '\r') { //Till the end
+    status += c;
+    stream.get(c);
+  }
+
+  if (!stream.good()) {
+    throw std::runtime_error("Parser error: stream is not good");
+  }
+
+  if (c == '\r') {
+    stream.get(c);
+    if (c != '\n') {
+      throw std::runtime_error("Parser error: '\\n' symbol is expected");
+    }
+  }
+
+  response.setStatus(parseResponseStatusFromString(status));
+
+  std::string name;
+  std::string value;
+
+  while (readHeader(stream, name, value)) {
+    response.addHeader(name, value);
+    name.clear();
+    value.clear();
+  }
+
+  response.addHeader(name, value);
+  auto headers = response.getHeaders();
+  size_t length = 0;
+  auto it = headers.find("Content-Length");
+  if (it != headers.end()) {
+    length = std::stoul(it->second);
+  }
+
+  std::string body;
+  if (length) {
+    readBody(stream, body, length);
+  }
+
+  response.setBody(body);
+}
+
+
+void HttpParser::readWord(std::istream& stream, std::string& word) {
+  char c;
+
+  stream.get(c);
+  while (stream.good() && c != ' ' && c != '\r') {
+    word += c;
+    stream.get(c);
+  }
+
+  if (!stream.good()) {
+    throw std::runtime_error("Parser error: stream is not good");
+  }
+
+  if (c == '\r') {
+    stream.get(c);
+    if (c != '\n') {
+      throw std::runtime_error("Parser error: '\\n' symbol is expected");
+    }
+  }
+}
+
+void HttpParser::readHeaders(std::istream& stream, HttpRequest::Headers& headers) {
+  std::string name;
+  std::string value;
+
+  while (readHeader(stream, name, value)) {
+    headers[name] = value; //use insert
+    name.clear();
+    value.clear();
+  }
+
+  headers[name] = value; //use insert
+}
+
+bool HttpParser::readHeader(std::istream& stream, std::string& name, std::string& value) {
+  char c;
+  bool isName = true;
+
+  stream.get(c);
+  while (stream.good() && c != '\r') {
+    if (c == ':') {
+      if (stream.peek() == ' ') {
+        stream.get(c);
+      }
+
+      if (name.empty()) {
+        throw std::runtime_error("Header name must be not empty");
+      }
+
+      if (isName) {
+        isName = false;
+        stream.get(c);
+        continue;
+      }
+    }
+
+    if (isName) {
+      name += c;
+      stream.get(c);
+    } else {
+      value += c;
+      stream.get(c);
+    }
+  }
+
+  if (!stream.good()) {
+    throw std::runtime_error("Parser error: stream is not good");
+  }
+
+  stream.get(c);
+  if (c != '\n') {
+    throw std::runtime_error("Parser error: '\\n' symbol is expected");
+  }
+
+  c = stream.peek();
+  if (c == '\r') {
+    stream.get(c).get(c);
+    if (c != '\n') {
+      throw std::runtime_error("Parser error: '\\n' symbol is expected");
+    }
+
+    return false; //no more headers
+  }
+
+  return true;
+}
+
+size_t HttpParser::getBodyLen(const HttpRequest::Headers& headers) {
+  auto it = headers.find("Content-Length");
+  if (it != headers.end()) {
+    size_t bytes = std::stoul(it->second);
+    return bytes;
+  }
+
+  return 0;
+}
+
+void HttpParser::readBody(std::istream& stream, std::string& body, const size_t bodyLen) {
+  size_t read = 0;
+
+  while (stream.good() && read < bodyLen) {
+    body += stream.get();
+    ++read;
+  }
+
+  if (!stream.good()) {
+    throw std::runtime_error("stream is not good");
+  }
+}
+
+}
+
+

src/System/HttpParser.h

@@ -0,0 +1,47 @@
+// Copyright (c) 2012-2014, The CryptoNote developers, The Bytecoin developers
+//
+// This file is part of Bytecoin.
+//
+// Bytecoin is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Bytecoin is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with Bytecoin.  If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef HTTPPARSER_H_
+#define HTTPPARSER_H_
+
+#include <iostream>
+#include <map>
+#include <string>
+#include "HttpRequest.h"
+#include "HttpResponse.h"
+
+namespace cryptonote {
+
+//Blocking HttpParser
+class HttpParser {
+public:
+  HttpParser() {};
+
+  void receiveRequest(std::istream& stream, HttpRequest& request);
+  void receiveResponse(std::istream& stream, HttpResponse& response);
+  static HttpResponse::HTTP_STATUS parseResponseStatusFromString(const std::string& status);
+private:
+  void readWord(std::istream& stream, std::string& word);
+  void readHeaders(std::istream& stream, HttpRequest::Headers &headers);
+  bool readHeader(std::istream& stream, std::string& name, std::string& value);
+  size_t getBodyLen(const HttpRequest::Headers& headers);
+  void readBody(std::istream& stream, std::string& body, const size_t bodyLen);
+};
+
+} //namespace cryptonote
+
+#endif /* HTTPPARSER_H_ */

src/System/HttpRequest.cpp

@@ -0,0 +1,73 @@
+// Copyright (c) 2012-2014, The CryptoNote developers, The Bytecoin developers
+//
+// This file is part of Bytecoin.
+//
+// Bytecoin is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Bytecoin is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with Bytecoin.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "HttpRequest.h"
+
+namespace cryptonote {
+
+  const std::string& HttpRequest::getMethod() const {
+    return method;
+  }
+
+  const std::string& HttpRequest::getUrl() const {
+    return url;
+  }
+
+  const HttpRequest::Headers& HttpRequest::getHeaders() const {
+    return headers;
+  }
+
+  const std::string& HttpRequest::getBody() const {
+    return body;
+  }
+
+  void HttpRequest::addHeader(const std::string& name, const std::string& value) {
+    headers[name] = value;
+  }
+  void HttpRequest::setBody(const std::string& b) {
+    body = b;
+    if (!body.empty()) {
+      headers["Content-Length"] = std::to_string(body.size());
+    }
+    else {
+      headers.erase("Content-Length");
+    }
+  }
+
+  void HttpRequest::setUrl(const std::string& u) {
+    url = u;
+  }
+
+  std::ostream& HttpRequest::printHttpRequest(std::ostream& os) const {
+    os << "POST " << url << " HTTP/1.1\r\n";
+    auto host = headers.find("Host");
+    if (host == headers.end()) {
+      os << "Host: " << "127.0.0.1" << "\r\n";
+    }
+
+    for (auto pair : headers) {
+      os << pair.first << ": " << pair.second << "\r\n";
+    }
+
+    os << "\r\n";
+    if (!body.empty()) {
+      os << body;
+    }
+
+    return os;
+  }
+}

src/System/HttpRequest.h

@@ -0,0 +1,53 @@
+// Copyright (c) 2012-2014, The CryptoNote developers, The Bytecoin developers
+//
+// This file is part of Bytecoin.
+//
+// Bytecoin is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Bytecoin is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with Bytecoin.  If not, see <http://www.gnu.org/licenses/>.
+
+#pragma once
+
+#include <iostream>
+#include <map>
+#include <string>
+
+namespace cryptonote {
+  class HttpRequest {
+  public:
+    typedef std::map<std::string, std::string> Headers;
+
+    const std::string& getMethod() const;
+    const std::string& getUrl() const;
+    const Headers& getHeaders() const;
+    const std::string& getBody() const;
+
+    void addHeader(const std::string& name, const std::string& value);
+    void setBody(const std::string& b);
+    void setUrl(const std::string& uri);
+
+  private:
+    friend class HttpParser;
+
+    std::string method;
+    std::string url;
+    Headers headers;
+    std::string body;
+
+    friend std::ostream& operator<<(std::ostream& os, const HttpRequest& resp);
+    std::ostream& printHttpRequest(std::ostream& os) const;
+  };
+
+  inline std::ostream& operator<<(std::ostream& os, const HttpRequest& resp) {
+    return resp.printHttpRequest(os);
+  }
+}