ari:Add application/json parameter support

The patch allows ARI to parse request parameters from an incoming JSON
request body, instead of requiring the request to come in as query
parameters (which is just weird for POST and DELETE) or form
parameters (which is okay, but a bit asymmetric given that all of our
responses are JSON).

For any operation that does _not_ have a parameter defined of type
body (i.e. "paramType": "body" in the API declaration), if a request
provides a request body with a Content type of "application/json", the
provided JSON document is parsed and searched for parameters.

The expected fields in the provided JSON document should match the
query parameters defined for the operation. If the parameter has
'allowMultiple' set, then the field in the JSON document may
optionally be an array of values.

(closes issue ASTERISK-22685)
Review: https://reviewboard.asterisk.org/r/2994/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@403177 65c4cc65-6c06-0410-ace0-fbb531ad65f3

1 files changed, 63 insertions, 0 deletions

diff --git a/rest-api-templates/param_parsing.mustache b/rest-api-templates/param_parsing.mustache
index aabd728fd..9d2073869 100644
--- a/rest-api-templates/param_parsing.mustache
+++ b/rest-api-templates/param_parsing.mustache
@@ -83,3 +83,66 @@
 		{}
 	}
 {{/has_path_parameters}}
+{{^is_websocket}}
+{{#parse_body}}
+	/* Look for a JSON request entity */
+	body = ast_http_get_json(ser, headers);
+	if (!body) {
+		switch (errno) {
+		case EFBIG:
+			ast_ari_response_error(response, 413, "Request Entity Too Large", "Request body too large");
+			goto fin;
+		case ENOMEM:
+			ast_ari_response_error(response, 500, "Internal Server Error", "Error processing request");
+			goto fin;
+		case EIO:
+			ast_ari_response_error(response, 400, "Bad Request", "Error parsing request body");
+			goto fin;
+		}
+	}
+{{#body_parameter}}
+	args.{{c_name}} = ast_json_ref(body);
+{{/body_parameter}}
+{{^body_parameter}}
+	/* Parse query parameters out of it */
+{{#query_parameters}}
+	field = ast_json_object_get(body, "{{name}}");
+	if (field) {
+{{^allow_multiple}}
+		args.{{c_name}} = {{json_convert}}(field);
+{{/allow_multiple}}
+{{#allow_multiple}}
+		/* If they were silly enough to both pass in a query param and a
+		 * JSON body, free up the query value.
+		 */
+		ast_free(args.{{c_name}});
+		if (ast_json_typeof(field) == AST_JSON_ARRAY) {
+			/* Multiple param passed as array */
+			size_t i;
+			args.{{c_name}}_count = ast_json_array_size(field);
+			args.{{c_name}} = ast_malloc(sizeof(*args.{{c_name}}) * args.{{c_name}}_count);
+
+			if (!args.{{c_name}}) {
+				ast_ari_response_alloc_failed(response);
+				goto fin;
+			}
+
+			for (i = 0; i < args.{{c_name}}_count; ++i) {
+				args.{{c_name}}[i] = {{json_convert}}(ast_json_array_get(field, i));
+			}
+		} else {
+			/* Multiple param passed as single value */
+			args.{{c_name}}_count = 1;
+			args.{{c_name}} = ast_malloc(sizeof(*args.{{c_name}}) * args.{{c_name}}_count);
+			if (!args.{{c_name}}) {
+				ast_ari_response_alloc_failed(response);
+				goto fin;
+			}
+			args.{{c_name}}[0] = {{json_convert}}(field);
+		}
+{{/allow_multiple}}
+	}
+{{/query_parameters}}
+{{/body_parameter}}
+{{/parse_body}}
+{{/is_websocket}}