[Django] Allow to upload the image directly to Glance service
Since large Glance images even temporarily stored on dashboard side tend to fill up Web Server filesystem, it is desirable to route image payload directly to Glance service (which usually streams it to storage backend, which in turn has plenty of space). To make it possible we need to trick Django into thinking that a file was selected inside FileInput, while its contents are not actually transferred to Django server. Then, once image is created client-side code needs to know the exact url the image payload needs to be transferred to. Both tasks are solved via using ExternalFileField / ExternalUploadMeta classes which allow to work around the usual Django form processing workflow with minimal changes to CreateImage form business logic. The client-side code relies on CORS being enabled for Glance service (otherwise browser would forbid the PUT request to a location different from the one form content came from). In a Devstack setup you'll need to edit [cors] section of glance-api.conf file, setting `allowed_origin` setting to the full hostname of the web server (say, http://<HOST_IP>/dashboard) and restart glance-api process. A progress bar is implemented to track the progress of a file upload, in case a really huge image is transferred. The new machinery could be easily switched on/off with a single setting `HORIZON_IMAGES_UPLOAD_MODE` set to 'direct' / 'legacy'. Related-Bug: #1467890 Closes-Bug: #1403129 Implements blueprint: horizon-glance-large-image-upload Change-Id: I01d02f75268186b43066df6fd966aa01c08e01d7
This commit is contained in:
Timur Sufiev
parent
450baeed4f
commit
93af461e40
@ -28,6 +28,8 @@ from horizon.forms.base import SelfHandlingForm # noqa
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from horizon.forms.base import SelfHandlingMixin # noqa
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from horizon.forms.fields import DynamicChoiceField # noqa
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from horizon.forms.fields import DynamicTypedChoiceField # noqa
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from horizon.forms.fields import ExternalFileField # noqa
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from horizon.forms.fields import ExternalUploadMeta # noqa
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from horizon.forms.fields import IPField # noqa
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from horizon.forms.fields import IPv4 # noqa
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from horizon.forms.fields import IPv6 # noqa
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@ -22,6 +22,7 @@ import uuid
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from django.core.exceptions import ValidationError # noqa
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from django.core import urlresolvers
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from django.forms import fields
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from django.forms import forms
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from django.forms.utils import flatatt # noqa
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from django.forms import widgets
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from django.template import Context # noqa
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@ -380,3 +381,53 @@ class ThemableCheckboxFieldRenderer(widgets.CheckboxFieldRenderer):
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class ThemableCheckboxSelectMultiple(widgets.CheckboxSelectMultiple):
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renderer = ThemableCheckboxFieldRenderer
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_empty_value = []
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class ExternalFileField(fields.FileField):
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"""A special flavor of FileField which is meant to be used in cases when
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instead of uploading file to Django it should be uploaded to some external
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location, while the form validation is done as usual. Should be paired
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with ExternalUploadMeta metaclass embedded into the Form class.
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"""
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def __init__(self, *args, **kwargs):
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super(ExternalFileField, self).__init__(*args, **kwargs)
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self.widget.attrs.update({'data-external-upload': 'true'})
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class ExternalUploadMeta(forms.DeclarativeFieldsMetaclass):
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"""Set this class as the metaclass of a form that contains
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ExternalFileField in order to process ExternalFileField fields in a
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specific way. A hidden CharField twin of FieldField is created which
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contains just the filename (if any file was selected on browser side) and
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a special `clean` method for FileField is defined which extracts just file
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name. This allows to avoid actual file upload to Django server, yet
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process form clean() phase as usual. Actual file upload happens entirely
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on client-side.
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"""
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def __new__(mcs, name, bases, attrs):
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def get_double_name(name):
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suffix = '__hidden'
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slen = len(suffix)
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return name[:-slen] if name.endswith(suffix) else name + suffix
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def make_clean_method(field_name):
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def _clean_method(self):
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value = self.cleaned_data[field_name]
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if value:
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self.cleaned_data[get_double_name(field_name)] = value
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return value
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return _clean_method
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new_attrs = {}
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for attr_name, attr in attrs.items():
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new_attrs[attr_name] = attr
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if isinstance(attr, ExternalFileField):
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hidden_field = fields.CharField(widget=fields.HiddenInput,
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required=False)
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hidden_field.creation_counter = attr.creation_counter + 1000
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new_attr_name = get_double_name(attr_name)
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new_attrs[new_attr_name] = hidden_field
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meth_name = 'clean_' + new_attr_name
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new_attrs[meth_name] = make_clean_method(new_attr_name)
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return super(ExternalUploadMeta, mcs).__new__(
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mcs, name, bases, new_attrs)
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@ -191,6 +191,11 @@ class ModalFormView(ModalFormMixin, views.HorizonFormView):
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else:
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success_url = self.get_success_url()
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response = http.HttpResponseRedirect(success_url)
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if hasattr(handled, 'to_dict'):
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obj_dict = handled.to_dict()
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if 'upload_url' in obj_dict:
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response['X-File-Upload-URL'] = obj_dict['upload_url']
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response['X-Auth-Token'] = obj_dict['token_id']
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# TODO(gabriel): This is not a long-term solution to how
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# AJAX should be handled, but it's an expedient solution
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# until the blueprint for AJAX handling is architected
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@ -149,6 +149,11 @@ class HorizonMiddleware(object):
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# the user *on* the login form...
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return shortcuts.redirect(exception.location)
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@staticmethod
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def copy_headers(src, dst, headers):
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for header in headers:
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dst[header] = src[header]
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def process_response(self, request, response):
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"""Convert HttpResponseRedirect to HttpResponse if request is via ajax
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to allow ajax request to redirect url
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@ -183,6 +188,10 @@ class HorizonMiddleware(object):
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redirect_response.set_cookie(
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cookie_name, cookie.value, **cookie_kwargs)
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redirect_response['X-Horizon-Location'] = response['location']
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upload_url_key = 'X-File-Upload-URL'
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if upload_url_key in response:
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self.copy_headers(response, redirect_response,
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(upload_url_key, 'X-Auth-Token'))
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return redirect_response
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if queued_msgs:
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# TODO(gabriel): When we have an async connection to the
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@ -14,6 +14,7 @@ horizon.modals = {
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// Storage for our current jqXHR object.
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_request: null,
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spinner: null,
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progress_bar: null,
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_init_functions: []
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};
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@ -61,6 +62,21 @@ horizon.modals.modal_spinner = function (text) {
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horizon.modals.spinner.find(".modal-body").spin(horizon.conf.spinner_options.modal);
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};
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horizon.modals.progress_bar = function (text) {
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var template = horizon.templates.compiled_templates["#progress-modal"];
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horizon.modals.bar = $(template.render({text: text}))
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.appendTo("#modal_wrapper");
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horizon.modals.bar.modal({backdrop: 'static'});
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var $progress_bar = horizon.modals.bar.find('.progress-bar');
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horizon.modals.progress_bar.update = function(fraction) {
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var percent = Math.round(100 * fraction) + '%';
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$progress_bar
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.css('width', Math.round(100 * fraction) + '%')
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.parents('.progress-text').find('.progress-bar-text').text(percent);
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};
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};
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horizon.modals.init_wizard = function () {
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// If workflow is in wizard mode, initialize wizard.
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var _max_visited_step = 0;
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@ -176,6 +192,54 @@ horizon.modals.init_wizard = function () {
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});
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};
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horizon.modals.getUploadUrl = function(jqXHR) {
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return jqXHR.getResponseHeader("X-File-Upload-URL");
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};
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horizon.modals.fileUpload = function(url, file, jqXHR) {
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var token = jqXHR.getResponseHeader('X-Auth-Token');
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horizon.modals.progress_bar(gettext("Uploading image"));
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return $.ajax({
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type: 'PUT',
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url: url,
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xhrFields: {
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withCredentials: true
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},
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headers: {
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'X-Auth-Token': token
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},
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data: file,
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processData: false, // tell jQuery not to process the data
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contentType: 'application/octet-stream',
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xhr: function() {
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var xhr = new window.XMLHttpRequest();
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xhr.upload.addEventListener('progress', function(evt) {
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if (evt.lengthComputable) {
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horizon.modals.progress_bar.update(evt.loaded / evt.total);
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}
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}, false);
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return xhr;
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}
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});
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};
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horizon.modals.prepareFileUpload = function($form) {
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var $elem = $form.find('input[data-external-upload]');
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if (!$elem.length) {
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return undefined;
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}
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var file = $elem.get(0).files[0];
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var $hiddenPseudoFile = $form.find('input[name="' + $elem.attr('name') + '__hidden"]');
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if (file) {
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$hiddenPseudoFile.val(file.name);
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$elem.remove();
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return file;
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} else {
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$hiddenPseudoFile.val('');
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return undefined;
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}
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};
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horizon.addInitFunction(horizon.modals.init = function() {
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@ -200,7 +264,7 @@ horizon.addInitFunction(horizon.modals.init = function() {
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update_field_id = $form.attr("data-add-to-field"),
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headers = {},
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modalFileUpload = $form.attr("enctype") === "multipart/form-data",
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formData, ajaxOpts, featureFileList, featureFormData;
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formData, ajaxOpts, featureFileList, featureFormData, file;
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if (modalFileUpload) {
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featureFileList = $("<input type='file'/>").get(0).files !== undefined;
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@ -213,6 +277,7 @@ horizon.addInitFunction(horizon.modals.init = function() {
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// modal forms won't work in them (namely, IE9).
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return;
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} else {
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file = horizon.modals.prepareFileUpload($form);
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formData = new window.FormData(form);
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}
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} else {
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@ -227,6 +292,38 @@ horizon.addInitFunction(horizon.modals.init = function() {
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headers["X-Horizon-Add-To-Field"] = update_field_id;
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}
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function processServerSuccess(data, textStatus, jqXHR) {
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var redirect_header = jqXHR.getResponseHeader("X-Horizon-Location"),
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add_to_field_header = jqXHR.getResponseHeader("X-Horizon-Add-To-Field"),
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json_data, field_to_update;
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if (redirect_header === null) {
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$('.ajax-modal, .dropdown-toggle').removeAttr("disabled");
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}
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if (redirect_header) {
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location.href = redirect_header;
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} else if (add_to_field_header) {
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json_data = $.parseJSON(data);
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field_to_update = $("#" + add_to_field_header);
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field_to_update.append("<option value='" + json_data[0] + "'>" + json_data[1] + "</option>");
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field_to_update.change();
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field_to_update.val(json_data[0]);
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} else {
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horizon.modals.success(data, textStatus, jqXHR);
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}
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}
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function processServerError(jqXHR, textStatus, errorThrown, $formElement) {
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$formElement = $formElement || $form;
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if (jqXHR.getResponseHeader('logout')) {
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location.href = jqXHR.getResponseHeader("X-Horizon-Location");
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} else {
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$('.ajax-modal, .dropdown-toggle').removeAttr("disabled");
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$formElement.closest(".modal").modal("hide");
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horizon.alert("danger", gettext("There was an error submitting the form. Please try again."));
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}
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}
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ajaxOpts = {
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type: "POST",
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url: $form.attr('action'),
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@ -246,35 +343,25 @@ horizon.addInitFunction(horizon.modals.init = function() {
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$button.prop("disabled", false);
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},
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success: function (data, textStatus, jqXHR) {
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var redirect_header = jqXHR.getResponseHeader("X-Horizon-Location"),
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add_to_field_header = jqXHR.getResponseHeader("X-Horizon-Add-To-Field"),
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json_data, field_to_update;
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if (redirect_header === null) {
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$('.ajax-modal, .dropdown-toggle').removeAttr("disabled");
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}
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var promise;
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var uploadUrl = horizon.modals.getUploadUrl(jqXHR);
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$form.closest(".modal").modal("hide");
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if (redirect_header) {
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location.href = redirect_header;
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if (uploadUrl) {
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promise = horizon.modals.fileUpload(uploadUrl, file, jqXHR);
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}
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else if (add_to_field_header) {
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json_data = $.parseJSON(data);
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field_to_update = $("#" + add_to_field_header);
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field_to_update.append("<option value='" + json_data[0] + "'>" + json_data[1] + "</option>");
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field_to_update.change();
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field_to_update.val(json_data[0]);
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if (promise) {
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promise.then(function() {
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// ignore data resolved in asyncUpload promise
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processServerSuccess(data, textStatus, jqXHR);
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}, function(jqXHR, statusText, errorThrown) {
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var $progressBar = horizon.modals.bar.find('.progress-bar');
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processServerError(jqXHR, statusText, errorThrown, $progressBar);
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});
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} else {
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horizon.modals.success(data, textStatus, jqXHR);
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processServerSuccess(data, textStatus, jqXHR);
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}
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},
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error: function (jqXHR) {
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if (jqXHR.getResponseHeader('logout')) {
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location.href = jqXHR.getResponseHeader("X-Horizon-Location");
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} else {
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$('.ajax-modal, .dropdown-toggle').removeAttr("disabled");
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$form.closest(".modal").modal("hide");
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horizon.alert("danger", gettext("There was an error submitting the form. Please try again."));
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}
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}
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error: processServerError
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};
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if (modalFileUpload) {
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@ -7,7 +7,8 @@ horizon.templates = {
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"#alert_message_template",
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"#spinner-modal",
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"#membership_template",
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"#confirm_modal"
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"#confirm_modal",
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"#progress-modal"
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],
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compiled_templates: {}
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};
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@ -1,6 +1,10 @@
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{% load horizon %}
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{% minifyspace %}
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{% if text %}
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<div class="progress-text">
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{% endif %}
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<div class="progress">
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{% for this_bar in bars %}
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<div class="progress-bar
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@ -17,7 +21,7 @@
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aria-valuenow="{{ this_bar.percent }}"
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aria-valuemin="{{ min_val }}"
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aria-valuemax="{{ max_val }}"
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style="width: {{ this_bar.percent }}%;{% if text %} min-width: 2em;{% endif %}">
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style="width: {{ this_bar.percent }}%;">
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{% if not text %}
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<span class="sr-only">
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{{ this_bar.percent }}%
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@ -26,4 +30,9 @@
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</div>
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{% endfor %}
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</div>
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{% if text %}
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<span class="progress-bar-text">{{ text }}</span>
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</div>
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{% endif %}
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{% endminifyspace %}
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19
horizon/templates/horizon/client_side/_progress.html
Normal file
19
horizon/templates/horizon/client_side/_progress.html
Normal file
@ -0,0 +1,19 @@
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{% extends "horizon/client_side/template.html" %}
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{% load i18n horizon bootstrap %}
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{% block id %}progress-modal{% endblock %}
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{% block template %}{% spaceless %}{% jstemplate %}
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<div class="modal loading">
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<div class="modal-dialog modal-sm">
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<div class="modal-content">
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<div class="modal-body">
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<div class="modal-progress-loader">
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{% bs_progress_bar 0 text="0%" %}
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<div class="progress-label text-center h4">[[text]]</div>
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</div>
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</div>
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</div>
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</div>
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</div>
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{% endjstemplate %}{% endspaceless %}{% endblock %}
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@ -4,3 +4,4 @@
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{% include "horizon/client_side/_loading.html" %}
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{% include "horizon/client_side/_membership.html" %}
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{% include "horizon/client_side/_confirm.html" %}
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{% include "horizon/client_side/_progress.html" %}
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@ -29,7 +29,7 @@ def bs_progress_bar(*args, **kwargs):
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param args (Array of Numbers: 0-100): Percent of Progress Bars
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param context (String): Adds 'progress-bar-{context} to the class attribute
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param contexts (Array of Strings): Cycles through contexts for stacked bars
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param text (Boolean): True: shows value within the bar, False: uses sr span
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param text (String): True: shows value within the bar, False: uses sr span
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param striped (Boolean): Adds 'progress-bar-striped' to the class attribute
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param animated (Boolean): Adds 'active' to the class attribute if striped
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param min_val (0): Used for the aria-min value
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@ -26,6 +26,7 @@ from django.forms import ValidationError # noqa
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from django.forms.widgets import HiddenInput # noqa
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from django.template import defaultfilters
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from django.utils.translation import ugettext_lazy as _
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import six
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from horizon import exceptions
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from horizon import forms
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@ -86,7 +87,16 @@ def create_image_metadata(data):
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return meta
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class CreateImageForm(forms.SelfHandlingForm):
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if api.glance.get_image_upload_mode() == 'direct':
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FileField = forms.ExternalFileField
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CreateParent = six.with_metaclass(forms.ExternalUploadMeta,
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forms.SelfHandlingForm)
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else:
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FileField = forms.FileField
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CreateParent = forms.SelfHandlingForm
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class CreateImageForm(CreateParent):
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name = forms.CharField(max_length=255, label=_("Name"))
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description = forms.CharField(
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max_length=255,
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@ -121,10 +131,10 @@ class CreateImageForm(forms.SelfHandlingForm):
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'ng-change': 'ctrl.selectImageFormat(ctrl.imageFile.name)',
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'image-file-on-change': None
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}
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image_file = forms.FileField(label=_("Image File"),
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help_text=_("A local image to upload."),
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widget=forms.FileInput(attrs=image_attrs),
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required=False)
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image_file = FileField(label=_("Image File"),
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help_text=_("A local image to upload."),
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widget=forms.FileInput(attrs=image_attrs),
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||||
required=False)
|
||||
kernel = forms.ChoiceField(
|
||||
label=_('Kernel'),
|
||||
required=False,
|
||||
@ -274,7 +284,7 @@ class CreateImageForm(forms.SelfHandlingForm):
|
||||
if (api.glance.get_image_upload_mode() != 'off' and
|
||||
policy.check((("image", "upload_image"),), request) and
|
||||
data.get('image_file', None)):
|
||||
meta['data'] = self.files['image_file']
|
||||
meta['data'] = data['image_file']
|
||||
elif data['is_copying']:
|
||||
meta['copy_from'] = data['image_url']
|
||||
else:
|
||||
|
||||
@ -8,7 +8,7 @@
|
||||
}
|
||||
|
||||
.progress-bar-text {
|
||||
bottom: 0;
|
||||
top: 0;
|
||||
line-height: 1.5em;
|
||||
position: absolute;
|
||||
z-index: 1;
|
||||
@ -18,7 +18,6 @@
|
||||
text-align: center;
|
||||
display: inline-block;
|
||||
width: 100%;
|
||||
height: 100%;
|
||||
@include text-overflow();
|
||||
}
|
||||
}
|
||||
@ -38,4 +37,24 @@
|
||||
.progress-bar {
|
||||
width: 100%;
|
||||
}
|
||||
}
|
||||
|
||||
.modal-progress-loader {
|
||||
display: flex;
|
||||
flex-direction: column;
|
||||
height: 100%;
|
||||
|
||||
.progress-text {
|
||||
flex: 1 0 auto;
|
||||
position: relative;
|
||||
|
||||
.progress,
|
||||
.progress-bar-text {
|
||||
top: 50%;
|
||||
}
|
||||
|
||||
.progress {
|
||||
position: relative;
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -141,10 +141,10 @@ def data(TEST):
|
||||
|
||||
admin_role_dict = {'id': '1',
|
||||
'name': 'admin'}
|
||||
admin_role = roles.Role(roles.RoleManager, admin_role_dict)
|
||||
admin_role = roles.Role(roles.RoleManager, admin_role_dict, loaded=True)
|
||||
member_role_dict = {'id': "2",
|
||||
'name': settings.OPENSTACK_KEYSTONE_DEFAULT_ROLE}
|
||||
member_role = roles.Role(roles.RoleManager, member_role_dict)
|
||||
member_role = roles.Role(roles.RoleManager, member_role_dict, loaded=True)
|
||||
TEST.roles.add(admin_role, member_role)
|
||||
TEST.roles.admin = admin_role
|
||||
TEST.roles.member = member_role
|
||||
@ -370,14 +370,14 @@ def data(TEST):
|
||||
'remote_ids': ['rid_1', 'rid_2']}
|
||||
idp_1 = identity_providers.IdentityProvider(
|
||||
identity_providers.IdentityProviderManager,
|
||||
idp_dict_1)
|
||||
idp_dict_1, loaded=True)
|
||||
idp_dict_2 = {'id': 'idp_2',
|
||||
'description': 'identiy provider 2',
|
||||
'enabled': True,
|
||||
'remote_ids': ['rid_3', 'rid_4']}
|
||||
idp_2 = identity_providers.IdentityProvider(
|
||||
identity_providers.IdentityProviderManager,
|
||||
idp_dict_2)
|
||||
idp_dict_2, loaded=True)
|
||||
TEST.identity_providers.add(idp_1, idp_2)
|
||||
|
||||
idp_mapping_dict = {
|
||||
@ -420,5 +420,6 @@ def data(TEST):
|
||||
'mapping_id': 'mapping_1'}
|
||||
idp_protocol = protocols.Protocol(
|
||||
protocols.ProtocolManager,
|
||||
idp_protocol_dict_1)
|
||||
idp_protocol_dict_1,
|
||||
loaded=True)
|
||||
TEST.idp_protocols.add(idp_protocol)
|
||||
|
||||
@ -1,7 +1,7 @@
|
||||
---
|
||||
features:
|
||||
- Create from a local file feature is added to the Angular
|
||||
Create Image workflow. It works either in a 'legacy' mode
|
||||
- Create from a local file feature is added to both Angular and Django
|
||||
Create Image workflows. It works either in a 'legacy' mode
|
||||
which proxies an image upload through Django, or in a new
|
||||
'direct' mode, which in turn implements
|
||||
[`blueprint horizon-glance-large-image-upload
|
||||
|
||||
Loading…
Reference in New Issue
Block a user