1 // Schema Validator example
3 // The example validates JSON text from stdin with a JSON schema specified in the argument.
5 #include "rapidjson/error/en.h"
6 #include "rapidjson/filereadstream.h"
7 #include "rapidjson/schema.h"
8 #include "rapidjson/stringbuffer.h"
10 using namespace rapidjson;
12 int main(int argc, char *argv[]) {
14 fprintf(stderr, "Usage: schemavalidator schema.json < input.json\n");
18 // Read a JSON schema from file into Document
23 FILE *fp = fopen(argv[1], "r");
25 printf("Schema file '%s' not found\n", argv[1]);
28 FileReadStream fs(fp, buffer, sizeof(buffer));
30 if (d.HasParseError()) {
31 fprintf(stderr, "Schema file '%s' is not a valid JSON\n", argv[1]);
32 fprintf(stderr, "Error(offset %u): %s\n",
33 static_cast<unsigned>(d.GetErrorOffset()),
34 GetParseError_En(d.GetParseError()));
41 // Then convert the Document into SchemaDocument
44 // Use reader to parse the JSON in stdin, and forward SAX events to validator
45 SchemaValidator validator(sd);
47 FileReadStream is(stdin, buffer, sizeof(buffer));
48 if (!reader.Parse(is, validator) && reader.GetParseErrorCode() != kParseErrorTermination) {
49 // Schema validator error would cause kParseErrorTermination, which will handle it in next step.
50 fprintf(stderr, "Input is not a valid JSON\n");
51 fprintf(stderr, "Error(offset %u): %s\n",
52 static_cast<unsigned>(reader.GetErrorOffset()),
53 GetParseError_En(reader.GetParseErrorCode()));
56 // Check the validation result
57 if (validator.IsValid()) {
58 printf("Input JSON is valid.\n");
62 printf("Input JSON is invalid.\n");
64 validator.GetInvalidSchemaPointer().StringifyUriFragment(sb);
65 fprintf(stderr, "Invalid schema: %s\n", sb.GetString());
66 fprintf(stderr, "Invalid keyword: %s\n", validator.GetInvalidSchemaKeyword());
68 validator.GetInvalidDocumentPointer().StringifyUriFragment(sb);
69 fprintf(stderr, "Invalid document: %s\n", sb.GetString());