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annotate memory_profiler_server.js @ 54:c451579bf83c

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Built out more of the /objects/ method.
author Atul Varma <varmaa@toolness.com>
date Wed, 24 Jun 2009 18:15:03 -0700
parents 2b22291fa09a
children 4910bc49a182
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50
853f80bd3b4b Added tentative profileMemory() server, which suspends the current JS runtime, creates a new one and runs a web server in it.
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1 var socket = new ServerSocket();
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2
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3 var PORT = 8080;
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4
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5 socket.bind("127.0.0.1", PORT);
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6 socket.listen();
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7
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8 var NEWLINE = "\r\n";
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9 var DOUBLE_NEWLINE = NEWLINE + NEWLINE;
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10
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11 function getHeaders(conn) {
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12 var headers = "";
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13 while (1) {
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14 var character = conn.recv(1);
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15 if (character == null)
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16 return null;
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17 headers += character;
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18 if (headers.indexOf(DOUBLE_NEWLINE) != -1)
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19 return headers;
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20 }
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21 }
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22
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23 print("Waiting for requests on port " + PORT + ".");
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24
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25 function processRequest(socket) {
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26 var conn = socket.accept();
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27
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28 try {
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29 var requestHeaders = getHeaders(conn);
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30 if (requestHeaders == null)
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31 return true;
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32 var requestLines = requestHeaders.split("\r\n");
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33 print(requestLines[0]);
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34 var reqParts = requestLines[0].split(" ");
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35 var method = reqParts[0];
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36 var path = reqParts[1];
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37
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38 var code = "200 OK";
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39 var toSend;
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40
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41 // TODO: We'd like to set the MIME type of JSON data to application/json,
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42 // but Firefox doesn't let us browse a webserver this way, which is
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43 // annoying, so we're just leaving it at text/plain for now.
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44
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45 if (path == "/gc-roots")
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46 toSend = JSON.stringify(getGCRoots());
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47
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48 if (path == "/stop")
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49 toSend = "Stopping server now!";
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51 var objNum = path.match(/^\/objects\/(\d+)$/);
53
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52 if (objNum) {
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53 objNum = objNum[1];
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54 var objInfo = getObjectInfo(objNum);
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55 if (objInfo) {
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56 toSend = JSON.stringify(objInfo);
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57 } else {
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58 code = "404 Not Found";
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59 toSend = "Object " + objNum + " does not exist.";
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60 }
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61 }
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62
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63 if (!toSend) {
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64 code = "404 Not Found";
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65 toSend = "Not found, yo.";
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66 }
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67
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68 //print("headers: " + uneval(requestHeaders));
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69 var headerLines = ["HTTP/1.0 " + code,
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70 "Content-Type: text/plain",
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71 "Connection: close",
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72 "Content-Length: " + toSend.length];
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73 var headers = headerLines.join("\r\n");
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74 var response = headers + DOUBLE_NEWLINE + toSend;
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75 //print("response: " + uneval(response));
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76 conn.send(response);
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77 conn.close();
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78 //print("response sent.");
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79 } catch (e) {
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80 print(e.toString());
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81 try { conn.close(); } catch (e) {}
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82 }
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83 if (path == "/stop")
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84 return false;
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85 return true;
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86 }
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87
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88 while (processRequest(socket)) {}
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89 socket.close();