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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,177 @@ | ||
| <cflog file="application" text="AI: Running"> | ||
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| <cffunction name="header"> | ||
| <cfargument name="namevalue" type="string" required="true"> | ||
| <cfheader name="#trim(listFirst(arguments.namevalue,":"))#" value="#listRest(arguments.namevalue,":")#"> | ||
| </cffunction> | ||
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|
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| <cffunction name="sendImage"> | ||
| <cfargument name="filename"> | ||
| <cfargument name="mime_type"> | ||
| <cfargument name="browser_cache" default=""> | ||
| <cfheader name="Content-type" value="#mime_type#"> | ||
| <cfheader name="Pragma" value="public"> | ||
| <cfif isNumeric(arguments.browser_cache)> | ||
| <cfheader name="Cache-Control" value="maxage=#arguments.browser_cache#"> | ||
| <!--- | ||
| //header('Expires: '.gmdate('D, d M Y H:i:s', time()+$browser_cache).' GMT'); | ||
| ---> | ||
| </cfif> | ||
| <cfset var fi = getFileInfo(arguments.filename)> | ||
| <cfheader name="Content-Length" value="#fi.size#"> | ||
| <cflog file="application" text="sending #arguments.filename# with #arguments.mime_type#"> | ||
| <cfcontent file="#arguments.filename#" type="#arguments.mime_type#"> | ||
| <cfabort> | ||
| </cffunction> | ||
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|
||
| <cfscript> | ||
| resolutions = [1382,992,768,430]; // the resolution break-points to use (screen widths, in pixels) | ||
| cache_path = "ai-cache"; // where to store the generated re-sized images. This folder must be writable. | ||
| jpg_quality = 80; // the quality of any generated JPGs on a scale of 0 to 100 | ||
| sharpen = TRUE; // Shrinking images can blur details, perform a sharpen on re-scaled images? | ||
| watch_cache = TRUE; // check that the responsive image isn't stale (ensures updated source images are re-cached) | ||
| browser_cache = 60*60*24*7; // How long the BROWSER cache should last (seconds, minutes, hours, days. 7days by default) | ||
| mobile_first = true; // If there's no cookie deliver the mobile version (if FALSE, delivers original resource) | ||
| document_root = expandPath("/"); | ||
| requested_uri = cgi.redirect_url; | ||
| requested_file = listLast(requested_uri, "/"); | ||
| writelog(file="application", text="AI: Requested #requested_uri#"); | ||
| extension = listLast(requested_file, "."); | ||
| switch (extension){ // sort out MIME types for different file types | ||
| case "png": | ||
| mime_type = "image/png"; | ||
| break; | ||
| case "gif": | ||
| mime_type = "image/gif"; | ||
| break; | ||
| default: | ||
| mime_type = "image/jpeg"; | ||
| break; | ||
| } | ||
| if (!fileExists(document_root & requested_uri)){ // and the requested file doesn't exist either | ||
| writelog(file="application", text="AI: Left cuz it didn't exist: #document_root##requested_uri#"); | ||
| header("Status: 404 Not Found"); | ||
| abort; | ||
| } | ||
| //If no cookie and !mobile first or bad cookie send original | ||
| if( | ||
| (!structKeyExists(cookie, "resolution") && !mobile_first) | ||
| || | ||
| (structKeyExists(cookie, "resolution") && !isNumeric(cookie.resolution))) { | ||
| sendImage(document_root & requested_uri,mime_type,browser_cache); | ||
| } | ||
| arraySort(resolutions, "numeric","desc"); // make sure the supplied break-points are in ascending size order | ||
| resolution = resolutions[1]; //This is the default | ||
| if(structKeyExists(cookie, "resolution")){ | ||
| writelog(file="application",text="AI: cookie.resolution=#cookie.resolution#"); | ||
| client_width = cookie.resolution; // store the cookie value in a variable | ||
| for(res in resolutions) { | ||
| writelog(file="application",text="res=#res#"); | ||
| if(client_width <= res) resolution=res; | ||
| } | ||
| } | ||
| writelog(file="application", text="AI: res=#resolution#"); | ||
| writelog(file="application", text="AI: cache #document_root#/#cache_path#/#resolution#/#requested_uri#"); | ||
| if(fileExists(document_root & "/#cache_path#/#resolution#/"&requested_uri)) { // it exists cached at that size | ||
| writelog(file="application", text="AI: Cache existed"); | ||
| sendImage(document_root&"/#cache_path#/#resolution#/"&requested_uri,mime_type,browser_cache); | ||
| } | ||
| else { // it doesn't exist at that size cached | ||
| if(watch_cache) { // if cache watching is enabled, compare cache and source modified dates to ensure the cache isn't stale | ||
| cache_file = document_root &"/" & cache_path & "/" & resolution &"/" & requested_uri; | ||
| if(fileExists(cache_file)) cache_date = getFileInfo(cache_file).lastmodified; | ||
| source_date = getFileInfo(document_root & requested_uri).lastmodified; | ||
| //writelog(file="application", text="cmp #cache_date# to #source_date# "); | ||
| if(!fileExists(cache_file) || cache_date < source_date) { // the source file has been replaced since the cache was generated | ||
| // Check the image dimensions | ||
| source_image = document_root & requested_uri; | ||
| src = imageRead(source_image); | ||
| width = imageGetWidth(src); | ||
| height = imageGetheight(src); | ||
| // Do we need to downscale the image? | ||
| if(width <= resolution) { // no, because the width of the source image is already less than the client width | ||
| writeLog(file="application", text="Width #width# less than res #resolution#"); | ||
| sendImage(document_root & requested_uri); | ||
| } | ||
| // We need to resize the source image to the width of the resolution breakpoint we're working with | ||
| ratio = height/width; | ||
| new_width = resolution; | ||
| new_height = ceiling(new_width * ratio); | ||
| dst = src; //Need to change this | ||
| imageResize(dst, new_width, new_height); // re-sized image | ||
| //ImageCopyResampled($dst, $src, 0, 0, 0, 0, $new_width, $new_height, $width, $height); // do the resize in memory | ||
| // sharpen the image? | ||
| if(sharpen == TRUE) { | ||
| imageSharpen(dst); | ||
| } | ||
| // check the path directory exists and is writable | ||
| directories = replace(requested_uri, "/#requested_file#", ""); // get the directories only | ||
| directories = right(directories, len(directories)-1); // clean the string | ||
| writelog(file="application", text="AI: directories=#directories#, to check:#document_root#/#cache_path#/#resolution#/#directories# - exisT? #directoryExists("#document_root#/#cache_path#/#resolution#/#directories#")#"); | ||
| if(!directoryExists("#document_root#/#cache_path#/#resolution#/#directories#")){ // does the directory exist already? | ||
| /* | ||
| if (!mkdir("$document_root/$cache_path/$resolution/$directories", 0777, true)) { // make the directory | ||
| // uh-oh, failed to make that directory | ||
| ImageDestroy($src); // clean-up after ourselves | ||
| ImageDestroy($dst); // clean-up after ourselves | ||
| // notify the client by way of throwing a message in a bottle, as that's all we can do | ||
| $im = ImageCreateTrueColor(800, 200); | ||
| $text_color = ImageColorAllocate($im, 233, 14, 91); | ||
| ImageString($im, 1, 5, 5, "Failed to create directories: $document_root/$cache_path/$resolution/$directories", $text_color); | ||
| header("Pragma: public"); | ||
| header("Cache-Control: maxage=" & $browser_cache); | ||
| header('Expires: ' & gmdate('D, d M Y H:i:s', time()+$browser_cache) & ' GMT'); | ||
| header('Content-Type: image/jpeg'); | ||
| ImageJpeg($im); ImageDestroy($im); | ||
| exit(); | ||
| } | ||
| */ | ||
| //create the dir - handle errors later | ||
| directoryCreate("#document_root#/#cache_path#/#resolution#/#directories#"); | ||
| writelog(file="application",text="AI: Made=#document_root#/#cache_path#/#resolution#/#directories#"); | ||
| } | ||
| // save the new file in the appropriate path, and send a version to the browser | ||
| imageWrite(dst, "#document_root#/#cache_path#/#resolution#/#directories#/#requested_file#"); | ||
| /* | ||
| if(!$gotSaved) { | ||
| // Couldn't save image, notify the client by way of throwing a message in a bottle, as that's all we can do | ||
| $im = ImageCreateTrueColor(800, 200); | ||
| $text_color = ImageColorAllocate($im, 233, 14, 91); | ||
| ImageString($im, 1, 5, 5, "Failed to create directories: $document_root/$cache_path/$resolution/$directories", $text_color); | ||
| header('Content-Type: image/jpeg'); | ||
| ImageJpeg($im); ImageDestroy($im); | ||
| exit(); | ||
| } | ||
| else { // we saved the image to cache, now deliver the image to the client | ||
| */ | ||
| //ImageDestroy($src); ImageDestroy($dst); | ||
| sendImage("#document_root#/#cache_path#/#resolution#/#directories#/#requested_file#",mime_type,browser_cache); | ||
| /*}*/ | ||
| } | ||
| } // end of if watch-cache | ||
| } // end it doesn't exist at the mobile size cached | ||
| </cfscript> |
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