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Django view for AWS S3 signing

Project description

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# django-s3sign
s3 sign view for django

## installation

$ pip install django-s3sign

## usage

Add `s3sign` to `INSTALLED_APPS`. Subclass `s3sign.views.SignS3View`
and override as needed.

Attributes you can override (and their default values):

```
name_field = 's3_object_name'
type_field = 's3_object_type'
expiration_time = 10
mime_type_extensions = [
('jpeg', '.jpg'),
('png', '.png'),
('gif', '.gif'),
]
default_extension = '.obj'
root = ''
path_string = (
"{root}{now.year:04d}/{now.month:02d}/"
"{now.day:02d}/{basename}{extension}")
amz_headers = "x-amz-acl:public-read"
```

Methods you can override:

* `get_aws_access_key(self)`
* `get_aws_secret_key(self)`
* `get_bucket(self)`
* `get_mimetype(self, request)`
* `extension_from_mimetype(self, mime_type)`
* `now(self)` # useful for unit tests
* `now_time(self)` # useful for unit tests
* `basename(self)`
* `get_object_name(self, extension)`

Most of those should be clear. Read the source if in doubt.


Eg to use a different root path:


```
from s3sign.views import SignS3View
...

class MySignS3View(LoggedInView, SignS3View):
root = 'uploads/'
```

With a different S3 bucket:

```
class MySignS3View(LoggedInView, SignS3View):
def get_bucket(self):
return settings.DIFFERENT_BUCKET_NAME
```

Keeping the uploaded filename instead of doing a random one and
whitelisted extension:

```
class MySignS3View(LoggedInView, SignS3View):
def basename(self, request):
filename = request.GET[self.get_name_field()]
return os.path.basename(filename)

def extension(self, request):
filename = request.GET[self.get_name_field()]
return os.path.splitext(filename)[1]
```


### javascript/forms

The required javascript is also included, so you can include it in
your page with:

<script src="{{STATIC_URL}}s3sign/js/s3upload.js"></script>

Your form would then somewhere have a bit like:

<p id="status"><b>Please select a file</b></p>
<input type="file" id="file" onchange="s3_upload();"/>
<input type="hidden" name="s3_url" id="uploaded-url" />

And

```
<script>
function s3_upload() {
var s3upload = new S3Upload({
file_dom_selector: 'file',
s3_sign_put_url: '/sign_s3/', // change this if you route differently
s3_object_name: $('#file')[0].value,

onProgress: function(percent, message) {
$('#status').html('Upload progress: ' + percent + '%' + message);
},
onFinishS3Put: function(url) {
$('#uploaded-url').val(url);
},
onError: function(status) {
$('#status').html('Upload error: ' + status);
}
});
}
</script>
```


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