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Upload Examples

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File Upload

This example shows the complete process for constructing a policy and form to upload a file attachment.

Policy and Form Construction

Following is a policy that supports uploads to Amazon S3 for the johnsmith bucket.

{ "expiration": "2007-12-01T12:00:00.000Z",
  "conditions": [
    {"bucket": "johnsmith"},
    ["starts-with", "$key", "user/eric/"],
    {"acl": "public-read"},
    {"success_action_redirect": "http://johnsmith.s3.amazonaws.com/successful_upload.html"},
    ["starts-with", "$Content-Type", "image/"],
    {"x-amz-meta-uuid": "14365123651274"},
    ["starts-with", "$x-amz-meta-tag", ""]
  ]
}

This policy requires the following:

The upload must occur before 12:00 GMT on 2007-12-01
The content must be uploaded to the johnsmith bucket
The key must start with "user/eric/"
The ACL is set to public-read
The success_action_redirect is set to http://johnsmith.s3.amazonaws.com/successful_upload.html
The object is an image file
The x-amz-meta-uuid tag must be set to 14365123651274
The x-amz-meta-tag can contain any value

Following is a Base64 encoded version of this policy.


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

Using your credentials create a signature, for example 0RavWzkygo6QX9caELEqKi9kDbU= is the signature for the preceding Policy document.

Following is a form that supports a POST to the johnsmith.net bucket using this policy.

<html>
  <head>
    ...
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    ...
  </head>
  <body>
  ...
  <form action="http://johnsmith.s3.amazonaws.com/" method="post" enctype="multipart/form-data">
    Key to upload: <input type="input" name="key" value="user/eric/" /><br />
    <input type="hidden" name="acl" value="public-read" />
    <input type="hidden" name="success_action_redirect" value="http://johnsmith.s3.amazonaws.com/successful_upload.html" />
    Content-Type: <input type="input" name="Content-Type" value="image/jpeg" /><br />
    <input type="hidden" name="x-amz-meta-uuid" value="14365123651274" />
    Tags for File: <input type="input" name="x-amz-meta-tag" value="" /><br />
    <input type="hidden" name="AWSAccessKeyId" value="AKIAIOSFODNN7EXAMPLE" />
    <input type="hidden" name="Policy" value="POLICY" />
    <input type="hidden" name="Signature" value="SIGNATURE" />
    File: <input type="file" name="file" /> <br />
    <!-- The elements after this will be ignored -->
    <input type="submit" name="submit" value="Upload to Amazon S3" />
  </form>
  ...
</html>

Sample Request

This request assumes that the image uploaded is 117,108 bytes; the image data is not included.

POST / HTTP/1.1
Host: johnsmith.s3.amazonaws.com
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.10) Gecko/20071115 Firefox/2.0.0.10
Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Content-Type: multipart/form-data; boundary=9431149156168
Content-Length: 118698 

--9431149156168
Content-Disposition: form-data; name="key"

user/eric/MyPicture.jpg
--9431149156168
Content-Disposition: form-data; name="acl"

public-read
--9431149156168
Content-Disposition: form-data; name="success_action_redirect"

http://johnsmith.s3.amazonaws.com/successful_upload.html
--9431149156168
Content-Disposition: form-data; name="Content-Type"

image/jpeg
--9431149156168
Content-Disposition: form-data; name="x-amz-meta-uuid"

14365123651274
--9431149156168
Content-Disposition: form-data; name="x-amz-meta-tag"

Some,Tag,For,Picture
--9431149156168
Content-Disposition: form-data; name="AWSAccessKeyId"

AKIAIOSFODNN7EXAMPLE
--9431149156168
Content-Disposition: form-data; name="Policy"

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
--9431149156168
Content-Disposition: form-data; name="Signature"

0RavWzkygo6QX9caELEqKi9kDbU=
--9431149156168
Content-Disposition: form-data; name="file"; filename="MyFilename.jpg"
Content-Type: image/jpeg

...file content...
--9431149156168
Content-Disposition: form-data; name="submit"

Upload to Amazon S3
--9431149156168--

Sample Response

HTTP/1.1 303 Redirect
x-amz-request-id: 1AEE782442F35865
x-amz-id-2: cxzFLJRatFHy+NGtaDFRR8YvI9BHmgLxjvJzNiGGICARZ/mVXHj7T+qQKhdpzHFh
Content-Type: application/xml
Date: Wed, 14 Nov 2007 21:21:33 GMT
Connection: close
Location: http://johnsmith.s3.amazonaws.com/successful_upload.html?bucket=johnsmith&key=user/eric/MyPicture.jpg&etag=&quot;39d459dfbc0faabbb5e179358dfb94c3&quot;
Server: AmazonS3

Text Area Upload

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This example shows the complete process for constructing a policy and form to upload a text area. This is useful for submitting user-created content such as blog postings.