Adds support to JSON request body parser

src/request_body_processor/json.h

@@ -0,0 +1,84 @@
+/*
+ * ModSecurity, http://www.modsecurity.org/
+ * Copyright (c) 2015 Trustwave Holdings, Inc. (http://www.trustwave.com/)
+ *
+ * You may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * If any of the files related to licensing are missing or if you have any
+ * other questions related to licensing please contact Trustwave Holdings, Inc.
+ * directly using the email address security@modsecurity.org.
+ *
+ */
+
+
+#include <yajl/yajl_parse.h>
+
+#include <string>
+#include <iostream>
+
+#include "modsecurity/transaction.h"
+#include "modsecurity/rules.h"
+
+#ifndef SRC_REQUEST_BODY_PROCESSOR_JSON_H_
+#define SRC_REQUEST_BODY_PROCESSOR_JSON_H_
+
+
+namespace modsecurity {
+namespace RequestBodyProcessor {
+
+
+struct json_data {
+    /* yajl configuration and parser state */
+    yajl_handle handle;
+    yajl_status status;
+
+    /* prefix is used to create data hierarchy (i.e., 'parent.child.value') */
+    std::string prefix;
+    std::string current_key;
+};
+
+typedef struct json_data json_data;
+
+
+class JSON {
+ public:
+    explicit JSON(Transaction *transaction);
+    ~JSON();
+
+    bool init();
+    bool processChunk(const char *buf, unsigned int size, std::string *err);
+    bool complete(std::string *err);
+
+    int addArgument(const std::string& value);
+
+    static int yajl_end_map(void *ctx);
+    static int yajl_start_map(void *ctx);
+    static int yajl_number(void *ctx, const char *value, size_t length);
+    static int yajl_string(void *ctx, const unsigned char *value,
+        size_t length);
+    static int yajl_boolean(void *ctx, int value);
+    static int yajl_null(void *ctx);
+    static int yajl_map_key(void *ctx, const unsigned char *key,
+        size_t length);
+
+#ifndef NO_LOGS
+    void debug(int a, std::string str) {
+        m_transaction->debug(a, str);
+    }
+#endif
+    json_data m_data;
+
+ private:
+    Transaction *m_transaction;
+    std::string m_header;
+};
+
+
+}  // namespace RequestBodyProcessor
+}  // namespace modsecurity
+
+
+#endif  // SRC_REQUEST_BODY_PROCESSOR_JSON_H_