--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/planemo/lib/python3.7/site-packages/galaxy/util/json.py	Fri Jul 31 00:32:28 2020 -0400
@@ -0,0 +1,187 @@
+from __future__ import absolute_import
+
+import collections
+import copy
+import json
+import logging
+import math
+import random
+import string
+
+from six import iteritems, string_types
+
+from ..util import unicodify
+
+__all__ = ("safe_dumps", "validate_jsonrpc_request", "validate_jsonrpc_response", "jsonrpc_request", "jsonrpc_response")
+
+log = logging.getLogger(__name__)
+
+to_json_string = json.dumps
+from_json_string = json.loads
+
+
+def swap_inf_nan(val):
+    """
+    This takes an arbitrary object and preps it for jsonifying safely, templating Inf/NaN.
+    """
+    if isinstance(val, string_types):
+        # basestring first, because it's a sequence and would otherwise get caught below.
+        return val
+    elif isinstance(val, collections.Sequence):
+        return [swap_inf_nan(v) for v in val]
+    elif isinstance(val, collections.Mapping):
+        return dict([(swap_inf_nan(k), swap_inf_nan(v)) for (k, v) in iteritems(val)])
+    elif isinstance(val, float):
+        if math.isnan(val):
+            return "__NaN__"
+        elif val == float("inf"):
+            return "__Infinity__"
+        elif val == float("-inf"):
+            return "__-Infinity__"
+        else:
+            return val
+    else:
+        return val
+
+
+def safe_loads(arg):
+    """
+    This is a wrapper around loads that returns the parsed value instead of
+    raising a value error. It also avoids autoconversion of non-iterables
+    i.e numeric and boolean values.
+    """
+    try:
+        loaded = json.loads(arg)
+        if loaded is not None and not isinstance(loaded, collections.Iterable):
+            loaded = arg
+    except (TypeError, ValueError):
+        loaded = arg
+    return loaded
+
+
+def safe_dumps(*args, **kwargs):
+    """
+    This is a wrapper around dumps that encodes Infinity and NaN values.  It's a
+    fairly rare case (which will be low in request volume).  Basically, we tell
+    json.dumps to blow up if it encounters Infinity/NaN, and we 'fix' it before
+    re-encoding.
+    """
+    try:
+        dumped = json.dumps(*args, allow_nan=False, **kwargs)
+    except ValueError:
+        obj = swap_inf_nan(copy.deepcopy(args[0]))
+        dumped = json.dumps(obj, allow_nan=False, **kwargs)
+    if kwargs.get('escape_closing_tags', True):
+        return dumped.replace('</', '<\\/')
+    return dumped
+
+
+def safe_dumps_formatted(obj):
+    """Attempt to format an object for display.
+
+    If serialization fails, the object's string representation will be returned instead.
+    """
+    try:
+        return safe_dumps(obj, sort_keys=True, indent=4, separators=(',', ': '))
+    except TypeError:
+        log.warning("JSON serialization failed for object: %s", str(obj))
+        return str(obj)
+
+
+# Methods for handling JSON-RPC
+
+def validate_jsonrpc_request(request, regular_methods, notification_methods):
+    try:
+        request = json.loads(request)
+    except Exception as e:
+        return False, request, jsonrpc_response(id=None,
+                                                error=dict(code=-32700,
+                                                           message='Parse error',
+                                                           data=unicodify(e)))
+    try:
+        assert 'jsonrpc' in request, \
+            'This server requires JSON-RPC 2.0 and no "jsonrpc" member was sent with the Request object as per the JSON-RPC 2.0 Specification.'
+        assert request['jsonrpc'] == '2.0', \
+            'Requested JSON-RPC version "%s" != required version "2.0".' % request['jsonrpc']
+        assert 'method' in request, 'No "method" member was sent with the Request object'
+    except AssertionError as e:
+        return False, request, jsonrpc_response(request=request,
+                                                error=dict(code=-32600,
+                                                           message='Invalid Request',
+                                                           data=unicodify(e)))
+    try:
+        assert request['method'] in (regular_methods + notification_methods)
+    except AssertionError:
+        return False, request, jsonrpc_response(request=request,
+                                                error=dict(code=-32601,
+                                                           message='Method not found',
+                                                           data='Valid methods are: %s' % ', '.join(regular_methods + notification_methods)))
+    try:
+        if request['method'] in regular_methods:
+            assert 'id' in request, 'No "id" member was sent with the Request object and the requested method "%s" is not a notification method' % request['method']
+    except AssertionError as e:
+        return False, request, jsonrpc_response(request=request,
+                                                error=dict(code=-32600,
+                                                           message='Invalid Request',
+                                                           data=unicodify(e)))
+    return True, request, None
+
+
+def validate_jsonrpc_response(response, id=None):
+    try:
+        response = json.loads(response)
+    except Exception as e:
+        log.error('Response was not valid JSON: %s', unicodify(e))
+        log.debug('Response was: %s', response)
+        return False, response
+    try:
+        assert 'jsonrpc' in response, \
+            'This server requires JSON-RPC 2.0 and no "jsonrpc" member was sent with the Response object as per the JSON-RPC 2.0 Specification.'
+        assert ('result' in response or 'error' in response), \
+            'Neither of "result" or "error" members were sent with the Response object.'
+        if 'error' in response:
+            assert int(response['error']['code']), \
+                'The "code" member of the "error" object in the Response is missing or not an integer.'
+            assert 'message' in response, \
+                'The "message" member of the "error" object in the Response is missing.'
+    except Exception:
+        log.exception('Response was not valid JSON-RPC')
+        log.debug('Response was: %s' % response)
+        return False, response
+    if id is not None:
+        try:
+            assert 'id' in response and response['id'] == id
+        except Exception:
+            log.error('The response id "%s" does not match the request id "%s"' % (response['id'], id))
+            return False, response
+    return True, response
+
+
+def jsonrpc_request(method, params=None, id=None, jsonrpc='2.0'):
+    if method is None:
+        log.error('jsonrpc_request(): "method" parameter cannot be None')
+        return None
+    request = dict(jsonrpc=jsonrpc, method=method)
+    if params:
+        request['params'] = params
+    if id is not None and id is True:
+        request['id'] = ''.join(random.choice(string.hexdigits) for i in range(16))
+    elif id is not None:
+        request['id'] = id
+    return request
+
+
+def jsonrpc_response(request=None, id=None, result=None, error=None, jsonrpc='2.0'):
+    if result:
+        rval = dict(jsonrpc=jsonrpc, result=result)
+    elif error:
+        rval = dict(jsonrpc=jsonrpc, error=error)
+    else:
+        msg = 'jsonrpc_response() called with out a "result" or "error" parameter'
+        log.error(msg)
+        rval = dict(jsonrpc=jsonrpc, error=msg)
+    if id is not None:
+        rval['id'] = id
+    elif request is not None and 'id' in request:
+        rval['id'] = request['id']
+    return rval