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RequestAPI servlet

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Dec 16th, 2018
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  1. package fys;
  2.  
  3. import javax.servlet.ServletException;
  4. import javax.servlet.annotation.WebServlet;
  5. import javax.servlet.http.HttpServlet;
  6. import javax.servlet.http.HttpServletRequest;
  7. import javax.servlet.http.HttpServletResponse;
  8.  
  9. import org.apache.http.HttpEntity;
  10. import org.apache.http.HttpResponse;
  11. import org.apache.http.client.HttpClient;
  12. import org.apache.http.client.methods.HttpPost;
  13. import org.apache.http.entity.ContentType;
  14. import org.apache.http.entity.StringEntity;
  15. import org.apache.http.impl.client.HttpClientBuilder;
  16.  
  17. import java.io.BufferedReader;
  18. import java.io.IOException;
  19. import java.io.InputStream;
  20. import java.io.InputStreamReader;
  21. import java.io.PrintWriter;
  22. import java.util.stream.Collectors;
  23.  
  24. @WebServlet(name = "Servlet", urlPatterns = {"/index.html"}) //little bit of a hack. no need for extra url because browsers always look for index.html
  25. public class Servlet extends HttpServlet {
  26.  
  27.  
  28. protected static String RequestAPI(String payload,String function) throws UnsupportedOperationException, IOException {
  29. String result = null;
  30. System.out.println(payload);
  31. StringEntity entity = new StringEntity(payload,
  32. ContentType.APPLICATION_FORM_URLENCODED);
  33. System.out.println(payload);
  34. HttpClient httpClient = HttpClientBuilder.create().build();
  35. String choice = function;
  36. String url = String.format("http://fys.securidoc.nl:11111/%s", choice);
  37. HttpPost dbrequest = new HttpPost(url);
  38. dbrequest.setEntity(entity);
  39.  
  40. HttpResponse response = httpClient.execute(dbrequest);
  41. System.out.println(response.getStatusLine().getStatusCode());
  42.  
  43. HttpEntity entityresponse = response.getEntity();
  44. if (entityresponse != null) {
  45. InputStream instream = entityresponse.getContent();
  46. result = convertStreamToString(instream);
  47. }
  48. return result;
  49. }
  50. protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  51. response.setContentType("text/html;charset=UTF-8");
  52. PrintWriter out = response.getWriter();
  53. try {
  54. //out.println("<!DOCTYPE html>");
  55. //out.println("<html>");
  56. //out.println("<head>");
  57. //out.println("<link href=\"style/style.css\" type=\"text/css\" rel=\"stylesheet\">");
  58. //out.println("<title>Servlet myServlet</title>");
  59. //out.println("</head>");
  60. //out.println("<body>");
  61. //out.println("<h1>Servlet myServlet at " + request.getContextPath() + "</h1>");
  62. //out.println("</body>");
  63. //out.println("</html>");
  64.  
  65.  
  66. //own stuff
  67. // DO NOT FORGET TO MOVE RESOURCE(CSS, IMG) FOLDERS TO WEB DIRECTORY
  68. out.println("<!DOCTYPE html>");
  69. out.println("<html lang=\"nl\">");
  70. out.println("<head>");
  71. out.println("<title>WiFi in het vliegtuig | Corendon</title>");
  72. out.println("<meta charset=\"UTF-8\">");
  73. out.println("<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">");
  74. out.println("<link href=\"style/style.css\" type=\"text/css\" rel=\"stylesheet\">");
  75. out.println("<script src=\"scripts/myscripts.js\"></script>");
  76. out.println("</head>");
  77. out.println("");
  78. out.println("<body id=\"loginPage\" onload=\"startTime()\">");
  79. out.println("<header>");
  80. out.println("<figure>");
  81. out.println("<img src=\"img/logo.jpg\" alt=\"Corendon_Logo\">");
  82. out.println("</figure>");
  83. out.println("<figure class=\"gradient\">");
  84. out.println("</figure>");
  85. out.println("</header>");
  86. out.println("<article class=\"login\">");
  87. out.println("<h1>Gratis internet in het vliegtuig</h1>");
  88. out.println("<p>Log in met uw gegevens:</p>");
  89. out.println("<form action=\"#\" method=\"post\">");
  90. out.println("<input type=\"text\" name=\"achternaam\" placeholder=\"Achternaam..\" required autofocus>");
  91. out.println("<input type=\"text\" name=\"boekingsnummer\" placeholder=\"Boekingsnummer..\" required>");
  92. out.println("<label>");
  93. out.println("<input type=\"checkbox\" name=\"check\" value=\"check\" required>");
  94. out.println("Ik ga akkoord met de <a href=\"doc/Voorwaarden.pdf\" target=\"_blank\">voorwaarden</a> en het <a href=\"doc/Privacybeleid.pdf\" target=\"_blank\">privacybeleid</a>");
  95. out.println("</label>");
  96. out.println("<input type=\"submit\" value=\"MAAK VERBINDING\">");
  97. out.println("</form>");
  98. out.println("</article>");
  99. out.println("<article class=\"info\">");
  100. out.println("<h1 id=\"clock\"></h1>");
  101. out.println("</article>");
  102. out.println("</body>");
  103. out.println("</html>");
  104. } finally {
  105. out.close();
  106. }
  107. }
  108.  
  109. protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  110. PrintWriter out = response.getWriter();
  111. out.println("<script>");
  112. String userdata = request.getReader().lines().collect(Collectors.joining());
  113. out.println(String.format("console.log(\"%s\")", userdata));
  114. out.println("</script>");
  115. if (userdata.contains("admin")) {
  116. out.println("<meta http-equiv=\"refresh\" content=\"0; URL='http://nu.nl'\" />"); //redirection example
  117. }
  118.  
  119. }
  120.  
  121. private static String convertStreamToString(InputStream is) {
  122.  
  123. BufferedReader reader = new BufferedReader(new InputStreamReader(is));
  124. StringBuilder sb = new StringBuilder();
  125.  
  126. String line = null;
  127. try {
  128. while ((line = reader.readLine()) != null) {
  129. sb.append(line + "\n");
  130. }
  131. } catch (IOException e) {
  132. e.printStackTrace();
  133. } finally {
  134. try {
  135. is.close();
  136. } catch (IOException e) {
  137. e.printStackTrace();
  138. }
  139. }
  140. return sb.toString();
  141. }
  142.  
  143.  
  144. }
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