| Jeff Thompson | 08ab3cd | 2012-10-08 02:56:20 -0700 | [diff] [blame^] | 1 | /*
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| 2 | * @author: ucla-cs
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| 3 | * This is the ccnx protocol handler.
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| 4 | * Protocol handling code derived from http://mike.kaply.com/2011/01/18/writing-a-firefox-protocol-handler/
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| 5 | */
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| 6 |
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| 7 | const Cc = Components.classes;
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| 8 | const Ci = Components.interfaces;
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| 9 | const Cr = Components.results;
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| 10 |
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| 11 | const nsIProtocolHandler = Ci.nsIProtocolHandler;
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| 12 |
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| 13 | Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
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| 14 | Components.utils.import("chrome://modules/content/ndn-js.jsm");
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| 15 | Components.utils.import("chrome://modules/content/ContentChannel.jsm");
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| 16 |
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| 17 | function CcnxProtocol() {
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| 18 | }
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| 19 |
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| 20 | CcnxProtocol.prototype = {
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| 21 | scheme: "ccnx",
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| 22 | protocolFlags: nsIProtocolHandler.URI_NORELATIVE |
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| 23 | nsIProtocolHandler.URI_NOAUTH |
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| 24 | nsIProtocolHandler.URI_LOADABLE_BY_ANYONE,
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| 25 |
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| 26 | newURI: function(aSpec, aOriginCharset, aBaseURI)
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| 27 | {
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| 28 | var uri = Cc["@mozilla.org/network/simple-uri;1"].createInstance(Ci.nsIURI);
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| 29 | uri.spec = aSpec;
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| 30 | return uri;
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| 31 | },
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| 32 |
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| 33 | newChannel: function(aURI)
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| 34 | {
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| 35 | try {
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| 36 | var requestContent = function(contentListener) {
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| 37 | var interest = aURI.spec.split(":")[1];
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| 38 | var ndn = new NDN();
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| 39 |
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| 40 | var coListener = {
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| 41 | onReceivedContentObject : function(contentObject) {
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| 42 | // Set up defaults.
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| 43 | var content = "";
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| 44 | var contentType = "text/html";
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| 45 | var contentCharset = "utf-8";
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| 46 |
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| 47 | if (contentObject.content != null) {
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| 48 | content = DataUtils.toString(contentObject.content);
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| 49 | // TODO: Should look at the returned Name to get contentType. For now,
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| 50 | // just look for an image file extension in the original interest.
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| 51 | var interestLowerCase = interest.toLowerCase();
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| 52 | if (interestLowerCase.indexOf(".gif") >= 0) {
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| 53 | contentType = "image/gif";
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| 54 | contentCharset = "ISO-8859-1";
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| 55 | }
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| 56 | else if (interestLowerCase.indexOf(".jpg") >= 0 ||
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| 57 | interestLowerCase.indexOf(".jpeg") >= 0) {
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| 58 | contentType = "image/jpeg";
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| 59 | contentCharset = "ISO-8859-1";
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| 60 | }
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| 61 | else if (interestLowerCase.indexOf(".png") >= 0) {
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| 62 | contentType = "image/png";
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| 63 | contentCharset = "ISO-8859-1";
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| 64 | }
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| 65 | else if (interestLowerCase.indexOf(".bmp") >= 0) {
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| 66 | contentType = "image/bmp";
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| 67 | contentCharset = "ISO-8859-1";
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| 68 | }
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| 69 | }
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| 70 |
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| 71 | contentListener.onReceivedContent(content, contentType, contentCharset);
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| 72 | }
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| 73 | };
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| 74 |
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| 75 | ndn.getAsync(interest, coListener);
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| 76 | };
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| 77 |
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| 78 | return new ContentChannel(aURI, requestContent);
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| 79 | } catch (ex) {
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| 80 | dump("CcnxProtocol.newChannel exception: " + ex + "\n");
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| 81 | }
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| 82 | },
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| 83 |
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| 84 | classDescription: "ccnx Protocol Handler",
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| 85 | contractID: "@mozilla.org/network/protocol;1?name=" + "ccnx",
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| 86 | classID: Components.ID('{8122e660-1012-11e2-892e-0800200c9a66}'),
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| 87 | QueryInterface: XPCOMUtils.generateQI([Ci.nsIProtocolHandler])
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| 88 | }
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| 89 |
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| 90 | if (XPCOMUtils.generateNSGetFactory)
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| 91 | var NSGetFactory = XPCOMUtils.generateNSGetFactory([CcnxProtocol]);
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| 92 | else
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| 93 | var NSGetModule = XPCOMUtils.generateNSGetModule([CcnxProtocol]);
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| 94 |
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| 95 |
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