commit 4e5cfcee07dc68aa6774fe81704a224904a47b2e Author: David Fifield david@bamsoftware.com Date: Sun Mar 11 23:26:21 2012 -0700
Add basic outline for JS proxy. --- embed.html | 9 ++++ flashproxy.js | 132 +++++++++++++++++++------------------------------------- 2 files changed, 54 insertions(+), 87 deletions(-)
diff --git a/embed.html b/embed.html index ce3c1b4..de90209 100644 --- a/embed.html +++ b/embed.html @@ -7,6 +7,15 @@ body { margin: 0; padding: 0; } +#flashproxy-badge.debug { + position: absolute; + left: 0; + top: 0; + width: 100%; + height: 100%; + color: #44cc44; + background-color: #001f0f; +} </style> </head> <body> diff --git a/flashproxy.js b/flashproxy.js index 30ad616..ab55f07 100644 --- a/flashproxy.js +++ b/flashproxy.js @@ -1,3 +1,40 @@ +function FlashProxy() +{ + this.debug_div = document.createElement("div"); + this.debug_div.className = "debug"; + + this.badge_elem = this.debug_div; + this.badge_elem.setAttribute("id", "flashproxy-badge"); + + this.puts = function(s) { + if (this.debug_div) { + this.debug_div.appendChild(document.createTextNode(s)); + this.debug_div.appendChild(document.createElement("br")); + } + }; + + this.start = function() { + this.puts("Hello world!"); + } +} + +/* This is the non-functional badge that occupies space when + flashproxy_should_disable decides that the proxy shouldn't run. */ +function DummyFlashProxy() +{ + var img; + + img = document.createElement("img"); + img.setAttribute("src", "https://crypto.stanford.edu/flashproxy/badge.png"); + img.setAttribute("border", 0); + img.setAttribute("id", "flashproxy-badge"); + + this.badge_elem = img; + + this.start = function() { + }; +} + /* Are circumstances such that we should self-disable and not be a proxy? We take a best-effort guess as to whether this device runs on a battery or the data transfer might be expensive. @@ -36,97 +73,15 @@ function flashproxy_should_disable() return false; }
-/* Create and return a DOM fragment: -<span id=BADGE_ID> -<a href=FLASHPROXY_INFO_URL> - child -</a> -</span> -*/ -function flashproxy_make_container(child) -{ - var BADGE_ID = "flashproxy-badge"; - var FLASHPROXY_INFO_URL = "https://crypto.stanford.edu/flashproxy/"; - - var container; - var a; - - container = document.createElement("span"); - container.setAttribute("id", "flashproxy-badge"); - a = document.createElement("a"); - a.setAttribute("href", FLASHPROXY_INFO_URL); - a.appendChild(child) - container.appendChild(a); - - return container; -} - -/* Create and return a DOM fragment: -<object width=WIDTH height=HEIGHT> - <param name="movie" value=SWFCAT_URL> - <param name="flashvars" value=FLASHVARS> - <embed src=SWFCAT_URL width=WIDTH height=HEIGHT flashvars=FLASHVARS></embed> -</object> -*/ -function flashproxy_make_badge() -{ - var WIDTH = 70; - var HEIGHT = 23; - var FLASHVARS = ""; - var SWFCAT_URL = "https://crypto.stanford.edu/flashproxy/swfcat.swf"; - - var object; - var param; - var embed; - - object = document.createElement("object"); - object.setAttribute("width", WIDTH); - object.setAttribute("height", HEIGHT); - - param = document.createElement("param"); - param.setAttribute("name", "movie"); - param.setAttribute("value", SWFCAT_URL); - object.appendChild(param); - param = document.createElement("param"); - param.setAttribute("name", "flashvars"); - param.setAttribute("value", FLASHVARS); - object.appendChild(param); - - embed = document.createElement("embed"); - embed.setAttribute("src", SWFCAT_URL); - embed.setAttribute("width", WIDTH); - embed.setAttribute("height", HEIGHT); - embed.setAttribute("flashvars", FLASHVARS); - object.appendChild(embed); - - return object; -} - -/* Create and return a non-functional placeholder badge DOM fragment: -<img src=BADGE_IMAGE_URL border="0"> -*/ -function flashproxy_make_dummy_badge() -{ - var BADGE_IMAGE_URL = "https://crypto.stanford.edu/flashproxy/badge.png"; - - var img; - - img = document.createElement("img"); - img.setAttribute("src", BADGE_IMAGE_URL); - img.setAttribute("border", 0); - - return img; -} - function flashproxy_badge_insert() { - var badge; + var fp; var e;
if (flashproxy_should_disable()) { - badge = flashproxy_make_dummy_badge(); + fp = new DummyFlashProxy(); } else { - badge = flashproxy_make_badge(); + fp = new FlashProxy(); }
/* http://intertwingly.net/blog/2006/11/10/Thats-Not-Write for this trick to @@ -135,7 +90,10 @@ function flashproxy_badge_insert() while (e.lastChild && e.lastChild.nodeType == 1) { e = e.lastChild; } - e.parentNode.appendChild(flashproxy_make_container(badge)); + e.parentNode.appendChild(fp.badge_elem); + + return fp; }
-flashproxy_badge_insert(); +fp = flashproxy_badge_insert(); +fp.start();