How upload file to S3 bucket using POST request
 

Following code helps you to upload file direct to AWS  s3 from user browser using post request. this code is very efficient to process large files on small servers.
 

<cfparam name="S3Encryption" default="1">

<cfset bucketName = "test-bucket"/>
<cfset fileKey = "test.png"/>
<cfset contentType ='images/png'/>
<cfset HTTPtimeout = "300">
<cfset cacheControl true>
<cfset cacheDays = "30">
<cfset acl = "public-read">
<cfset storageClass = "STANDARD">
<cfset keyName = fileKey/>
<cfset versionID = "">
		
<cfscript>
	if (application.s3ETAllowEncoding)
	{
		accessKeyId = application.S3ETKey;
		Variables.secretAccessKey = application.S3ETPass;
	}
	else
	{
		Variables.accessKeyId = application.S3Key;
		Variables.secretAccessKey = application.S3Pass;
	}   

	Expiration = Dateformat(DateAdd("d", 7, "#now()#"), "yyyy-mm-dd")&'T00:00:00Z';
	BucketName = bucketName; // Put your bucket name here
	RedirectURL ='';
	acl = acl; 
	ContenType = '#contentType#';
	FileSize = 5000000000; // max allowed upload size in Bytes
	Path = '';

</cfscript>
<cfsavecontent variable="S3policy">
	<cfoutput>
		{
			"expiration": "#Expiration#",
			"conditions": [ 
				{"bucket": "#BucketName#"}, 
				["starts-with", "$key", "#fileKey#"],
				{"acl": "#acl#"},
				["starts-with", "$Content-Type", "#ContenType#"],
				{"success_action_redirect": "#RedirectURL#"},
				["content-length-range", 0, #FileSize#]
            	,{"x-amz-server-side-encryption":"AES256"}
			]
		}
	</cfoutput>
</cfsavecontent>

<cfset PolicyBase64 = ToBase64(S3policy)>

<cfhttp url="http://s3.amazonaws.com/test-bucket" method="post" multipart="yes">  
	<cfhttpparam type="formfield" name="key" value="#fileKey#" />  
	<cfhttpparam type="formfield" name="acl" value="#acl#" />    
	<cfhttpparam type="formfield" name="AWSAccessKeyId" value="#accessKeyId#" />  
	<cfhttpparam type="formfield" name="Policy" value="#PolicyBase64#" />  
	<cfhttpparam type="formfield" name="Signature" value="#createSignature(PolicyBase64)#" />  
	<cfhttpparam type="formfield" name="Content-Type" value="#ContenType#" />
	<cfhttpparam type="formfield" name="success_action_redirect" value="" /> 
	<cfhttpparam type="formfield" name="x-amz-server-side-encryption" value="AES256" /> 

	<cfhttpparam type="file" name="file" file="#form.restfile#"/> 
</cfhttp>

Get Object From S3 API using S3 API

How TO download file from S3 using S3

<cfset var epochTime = DateDiff("s", DateConvert("utc2Local", "January 1 1970 00:00"), now()) + (5)>

<cfset var signatureString = "GET\n\n\n#epochTime#\n/test-bucket/test.png">

!--- Create a proper signature --->
<cfset signature = createSignature(signatureString)>

!--- AWS Link for download file from s3 bucket--->
<cfset link = "http://s3.amazon.com/test-bucket/test.png?response-content-disposition=attachment;filename="test.png"&AWSAccessKeyId=#URLEncodedFormat(accessKeyId)#&Expires=#epochTime#&Signature=#URLEncodedFormat(signature)#">

!--- AWS normal Link --->
<cfset link = "http://s3.amazon.com/test-bucket/test.png?AWSAccessKeyId=#URLEncodedFormat(accessKeyId)#&Expires=#epochTime#&Signature=#URLEncodedFormat(signature)#">

Delete object form S3 using AWS s3 API

<cfset var dateTimeString = GetHTTPTimeString(Now())>
 
 <!--- Create a canonical string to send based on operation requested --->
 <cfset var cs = "DELETE\n\n\n#dateTimeString#\n/test-bucket/test.png">
 
 <!--- Create a proper signature --->
 <cfset var signature = createSignature(cs)>
 
 <!--- delete the object via REST --->
 <cfhttp method="DELETE" url="http://s3.amazon.com/test-bucket/test.png">
  <cfhttpparam type="header" name="Date" value="#dateTimeString#">
  <cfhttpparam type="header" name="Authorization" value="AWS #accessKeyId#:#signature#">
 </cfhttp>

Put object to s3 bucket using s3 api

<cfset contentType = 'image/png'/>
 <cfset var dateTimeString = GetHTTPTimeString(Now())>
 <Cfset acl = 'public-read'/>
 <Cfset storageClass = 'STANDARD'/>
 <!--- Create a canonical string to send --->
 <cfset cs = "PUT\n\n#arguments.contentType#\n#dateTimeString#\nx-amz-acl:#arguments.acl#\nx-amz-storage class:#arguments.storageClass#\n/#arguments.bucketName#/#arguments.keyName#">
 
 <!--- Create a proper signature --->
 <cfset signature = createSignature(cs)>
 
 <!--- Read the image data into a variable --->
 <cffile action="readBinary" file="d:\\test.png" variable="binaryFileData">
 
 <!--- Send the file to amazon. The "X-amz-acl" controls the access properties of the file --->
 <cfhttp method="PUT" url="https://test-bucket.s3.amazonaws.com/test-bucket/test.png">
  <cfhttpparam type="header" name="Authorization" value="AWS #accessKeyId#:#signature#">
  <cfhttpparam type="header" name="Content-Type" value="#contentType#">
  <cfhttpparam type="header" name="Date" value="#dateTimeString#">
  <cfhttpparam type="header" name="x-amz-acl" value="#acl#">
  <cfhttpparam type="header" name="x-amz-storage-class" value="#storageClass#">
  <cfhttpparam type="body" value="#binaryFileData#">
  <!--- cache control in AWS s3 object --->
  <cfif  cacheControl EQ true>
   <cfhttpparam type="header" name="Cache-Control" value="max-age=2592000">
   <cfhttpparam type="header" name="Expires" value="#DateFormat(now()+3,'ddd, dd mmm yyyy')# #TimeFormat(now(),'H:MM:SS')# GMT">
  </cfif>
 </cfhttp>