265 lines
8.4 KiB
Python
265 lines
8.4 KiB
Python
# -*- coding: utf-8 -*-
|
|
"""
|
|
werkzeug.contrib.jsrouting
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
Addon module that allows to create a JavaScript function from a map
|
|
that generates rules.
|
|
|
|
:copyright: (c) 2014 by the Werkzeug Team, see AUTHORS for more details.
|
|
:license: BSD, see LICENSE for more details.
|
|
"""
|
|
try:
|
|
from simplejson import dumps
|
|
except ImportError:
|
|
try:
|
|
from json import dumps
|
|
except ImportError:
|
|
def dumps(*args):
|
|
raise RuntimeError('simplejson required for jsrouting')
|
|
|
|
from inspect import getmro
|
|
from werkzeug.routing import NumberConverter
|
|
from werkzeug._compat import iteritems
|
|
|
|
|
|
def render_template(name_parts, rules, converters):
|
|
result = u''
|
|
if name_parts:
|
|
for idx in range(0, len(name_parts) - 1):
|
|
name = u'.'.join(name_parts[:idx + 1])
|
|
result += u"if (typeof %s === 'undefined') %s = {}\n" % (name, name)
|
|
result += '%s = ' % '.'.join(name_parts)
|
|
result += """(function (server_name, script_name, subdomain, url_scheme) {
|
|
var converters = [%(converters)s];
|
|
var rules = %(rules)s;
|
|
function in_array(array, value) {
|
|
if (array.indexOf != undefined) {
|
|
return array.indexOf(value) != -1;
|
|
}
|
|
for (var i = 0; i < array.length; i++) {
|
|
if (array[i] == value) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
function array_diff(array1, array2) {
|
|
array1 = array1.slice();
|
|
for (var i = array1.length-1; i >= 0; i--) {
|
|
if (in_array(array2, array1[i])) {
|
|
array1.splice(i, 1);
|
|
}
|
|
}
|
|
return array1;
|
|
}
|
|
function split_obj(obj) {
|
|
var names = [];
|
|
var values = [];
|
|
for (var name in obj) {
|
|
if (typeof(obj[name]) != 'function') {
|
|
names.push(name);
|
|
values.push(obj[name]);
|
|
}
|
|
}
|
|
return {names: names, values: values, original: obj};
|
|
}
|
|
function suitable(rule, args) {
|
|
var default_args = split_obj(rule.defaults || {});
|
|
var diff_arg_names = array_diff(rule.arguments, default_args.names);
|
|
|
|
for (var i = 0; i < diff_arg_names.length; i++) {
|
|
if (!in_array(args.names, diff_arg_names[i])) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (array_diff(rule.arguments, args.names).length == 0) {
|
|
if (rule.defaults == null) {
|
|
return true;
|
|
}
|
|
for (var i = 0; i < default_args.names.length; i++) {
|
|
var key = default_args.names[i];
|
|
var value = default_args.values[i];
|
|
if (value != args.original[key]) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
function build(rule, args) {
|
|
var tmp = [];
|
|
var processed = rule.arguments.slice();
|
|
for (var i = 0; i < rule.trace.length; i++) {
|
|
var part = rule.trace[i];
|
|
if (part.is_dynamic) {
|
|
var converter = converters[rule.converters[part.data]];
|
|
var data = converter(args.original[part.data]);
|
|
if (data == null) {
|
|
return null;
|
|
}
|
|
tmp.push(data);
|
|
processed.push(part.name);
|
|
} else {
|
|
tmp.push(part.data);
|
|
}
|
|
}
|
|
tmp = tmp.join('');
|
|
var pipe = tmp.indexOf('|');
|
|
var subdomain = tmp.substring(0, pipe);
|
|
var url = tmp.substring(pipe+1);
|
|
|
|
var unprocessed = array_diff(args.names, processed);
|
|
var first_query_var = true;
|
|
for (var i = 0; i < unprocessed.length; i++) {
|
|
if (first_query_var) {
|
|
url += '?';
|
|
} else {
|
|
url += '&';
|
|
}
|
|
first_query_var = false;
|
|
url += encodeURIComponent(unprocessed[i]);
|
|
url += '=';
|
|
url += encodeURIComponent(args.original[unprocessed[i]]);
|
|
}
|
|
return {subdomain: subdomain, path: url};
|
|
}
|
|
function lstrip(s, c) {
|
|
while (s && s.substring(0, 1) == c) {
|
|
s = s.substring(1);
|
|
}
|
|
return s;
|
|
}
|
|
function rstrip(s, c) {
|
|
while (s && s.substring(s.length-1, s.length) == c) {
|
|
s = s.substring(0, s.length-1);
|
|
}
|
|
return s;
|
|
}
|
|
return function(endpoint, args, force_external) {
|
|
args = split_obj(args);
|
|
var rv = null;
|
|
for (var i = 0; i < rules.length; i++) {
|
|
var rule = rules[i];
|
|
if (rule.endpoint != endpoint) continue;
|
|
if (suitable(rule, args)) {
|
|
rv = build(rule, args);
|
|
if (rv != null) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (rv == null) {
|
|
return null;
|
|
}
|
|
if (!force_external && rv.subdomain == subdomain) {
|
|
return rstrip(script_name, '/') + '/' + lstrip(rv.path, '/');
|
|
} else {
|
|
return url_scheme + '://'
|
|
+ (rv.subdomain ? rv.subdomain + '.' : '')
|
|
+ server_name + rstrip(script_name, '/')
|
|
+ '/' + lstrip(rv.path, '/');
|
|
}
|
|
};
|
|
})""" % {'converters': u', '.join(converters),
|
|
'rules': rules}
|
|
|
|
return result
|
|
|
|
|
|
def generate_map(map, name='url_map'):
|
|
"""
|
|
Generates a JavaScript function containing the rules defined in
|
|
this map, to be used with a MapAdapter's generate_javascript
|
|
method. If you don't pass a name the returned JavaScript code is
|
|
an expression that returns a function. Otherwise it's a standalone
|
|
script that assigns the function with that name. Dotted names are
|
|
resolved (so you an use a name like 'obj.url_for')
|
|
|
|
In order to use JavaScript generation, simplejson must be installed.
|
|
|
|
Note that using this feature will expose the rules
|
|
defined in your map to users. If your rules contain sensitive
|
|
information, don't use JavaScript generation!
|
|
"""
|
|
from warnings import warn
|
|
warn(DeprecationWarning('This module is deprecated'))
|
|
map.update()
|
|
rules = []
|
|
converters = []
|
|
for rule in map.iter_rules():
|
|
trace = [{
|
|
'is_dynamic': is_dynamic,
|
|
'data': data
|
|
} for is_dynamic, data in rule._trace]
|
|
rule_converters = {}
|
|
for key, converter in iteritems(rule._converters):
|
|
js_func = js_to_url_function(converter)
|
|
try:
|
|
index = converters.index(js_func)
|
|
except ValueError:
|
|
converters.append(js_func)
|
|
index = len(converters) - 1
|
|
rule_converters[key] = index
|
|
rules.append({
|
|
u'endpoint': rule.endpoint,
|
|
u'arguments': list(rule.arguments),
|
|
u'converters': rule_converters,
|
|
u'trace': trace,
|
|
u'defaults': rule.defaults
|
|
})
|
|
|
|
return render_template(name_parts=name and name.split('.') or [],
|
|
rules=dumps(rules),
|
|
converters=converters)
|
|
|
|
|
|
def generate_adapter(adapter, name='url_for', map_name='url_map'):
|
|
"""Generates the url building function for a map."""
|
|
values = {
|
|
u'server_name': dumps(adapter.server_name),
|
|
u'script_name': dumps(adapter.script_name),
|
|
u'subdomain': dumps(adapter.subdomain),
|
|
u'url_scheme': dumps(adapter.url_scheme),
|
|
u'name': name,
|
|
u'map_name': map_name
|
|
}
|
|
return u'''\
|
|
var %(name)s = %(map_name)s(
|
|
%(server_name)s,
|
|
%(script_name)s,
|
|
%(subdomain)s,
|
|
%(url_scheme)s
|
|
);''' % values
|
|
|
|
|
|
def js_to_url_function(converter):
|
|
"""Get the JavaScript converter function from a rule."""
|
|
if hasattr(converter, 'js_to_url_function'):
|
|
data = converter.js_to_url_function()
|
|
else:
|
|
for cls in getmro(type(converter)):
|
|
if cls in js_to_url_functions:
|
|
data = js_to_url_functions[cls](converter)
|
|
break
|
|
else:
|
|
return 'encodeURIComponent'
|
|
return '(function(value) { %s })' % data
|
|
|
|
|
|
def NumberConverter_js_to_url(conv):
|
|
if conv.fixed_digits:
|
|
return u'''\
|
|
var result = value.toString();
|
|
while (result.length < %s)
|
|
result = '0' + result;
|
|
return result;''' % conv.fixed_digits
|
|
return u'return value.toString();'
|
|
|
|
|
|
js_to_url_functions = {
|
|
NumberConverter: NumberConverter_js_to_url
|
|
}
|