summaryrefslogtreecommitdiffstats
path: root/src/common/ceph_json.h
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--src/common/ceph_json.h725
1 files changed, 725 insertions, 0 deletions
diff --git a/src/common/ceph_json.h b/src/common/ceph_json.h
new file mode 100644
index 00000000..c77dddbe
--- /dev/null
+++ b/src/common/ceph_json.h
@@ -0,0 +1,725 @@
+#ifndef CEPH_JSON_H
+#define CEPH_JSON_H
+
+#include <include/types.h>
+#include <boost/container/flat_map.hpp>
+
+#ifdef _ASSERT_H
+#define NEED_ASSERT_H
+#pragma push_macro("_ASSERT_H")
+#endif
+
+#include "json_spirit/json_spirit.h"
+#undef _ASSERT_H
+
+#ifdef NEED_ASSERT_H
+#pragma pop_macro("_ASSERT_H")
+#endif
+
+#include "Formatter.h"
+
+using namespace json_spirit;
+
+
+class JSONObj;
+
+class JSONObjIter {
+ typedef map<string, JSONObj *>::iterator map_iter_t;
+ map_iter_t cur;
+ map_iter_t last;
+
+public:
+ JSONObjIter();
+ ~JSONObjIter();
+ void set(const JSONObjIter::map_iter_t &_cur, const JSONObjIter::map_iter_t &_end);
+
+ void operator++();
+ JSONObj *operator*();
+
+ bool end() const {
+ return (cur == last);
+ }
+};
+
+class JSONObj
+{
+ JSONObj *parent;
+public:
+ struct data_val {
+ string str;
+ bool quoted{false};
+
+ void set(std::string_view s, bool q) {
+ str = s;
+ quoted = q;
+ }
+ };
+protected:
+ string name; // corresponds to obj_type in XMLObj
+ Value data;
+ struct data_val val;
+ bool data_quoted{false};
+ multimap<string, JSONObj *> children;
+ map<string, data_val> attr_map;
+ void handle_value(Value v);
+
+public:
+
+ JSONObj() : parent(NULL){}
+
+ virtual ~JSONObj();
+
+ void init(JSONObj *p, Value v, string n);
+
+ string& get_name() { return name; }
+ data_val& get_data_val() { return val; }
+ const string& get_data() { return val.str; }
+ bool get_data(const string& key, data_val *dest);
+ JSONObj *get_parent();
+ void add_child(string el, JSONObj *child);
+ bool get_attr(string name, data_val& attr);
+ JSONObjIter find(const string& name);
+ JSONObjIter find_first();
+ JSONObjIter find_first(const string& name);
+ JSONObj *find_obj(const string& name);
+
+ friend ostream& operator<<(ostream &out,
+ const JSONObj &obj); // does not work, FIXME
+
+ bool is_array();
+ bool is_object();
+ vector<string> get_array_elements();
+};
+
+static inline ostream& operator<<(ostream &out, const JSONObj::data_val& dv) {
+ const char *q = (dv.quoted ? "\"" : "");
+ out << q << dv.str << q;
+ return out;
+}
+
+class JSONParser : public JSONObj
+{
+ int buf_len;
+ string json_buffer;
+ bool success;
+public:
+ JSONParser();
+ ~JSONParser() override;
+ void handle_data(const char *s, int len);
+
+ bool parse(const char *buf_, int len);
+ bool parse(int len);
+ bool parse();
+ bool parse(const char *file_name);
+
+ const char *get_json() { return json_buffer.c_str(); }
+ void set_failure() { success = false; }
+};
+
+void encode_json(const char *name, const JSONObj::data_val& v, Formatter *f);
+
+class JSONDecoder {
+public:
+ struct err {
+ string message;
+
+ err(const string& m) : message(m) {}
+ };
+
+ JSONParser parser;
+
+ JSONDecoder(bufferlist& bl) {
+ if (!parser.parse(bl.c_str(), bl.length())) {
+ cout << "JSONDecoder::err()" << std::endl;
+ throw JSONDecoder::err("failed to parse JSON input");
+ }
+ }
+
+ template<class T>
+ static bool decode_json(const char *name, T& val, JSONObj *obj, bool mandatory = false);
+
+ template<class C>
+ static bool decode_json(const char *name, C& container, void (*cb)(C&, JSONObj *obj), JSONObj *obj, bool mandatory = false);
+
+ template<class T>
+ static void decode_json(const char *name, T& val, const T& default_val, JSONObj *obj);
+
+ template<class T>
+ static bool decode_json(const char *name, boost::optional<T>& val, JSONObj *obj, bool mandatory = false);
+
+};
+
+template<class T>
+void decode_json_obj(T& val, JSONObj *obj)
+{
+ val.decode_json(obj);
+}
+
+static inline void decode_json_obj(string& val, JSONObj *obj)
+{
+ val = obj->get_data();
+}
+
+static inline void decode_json_obj(JSONObj::data_val& val, JSONObj *obj)
+{
+ val = obj->get_data_val();
+}
+
+void decode_json_obj(unsigned long long& val, JSONObj *obj);
+void decode_json_obj(long long& val, JSONObj *obj);
+void decode_json_obj(unsigned long& val, JSONObj *obj);
+void decode_json_obj(long& val, JSONObj *obj);
+void decode_json_obj(unsigned& val, JSONObj *obj);
+void decode_json_obj(int& val, JSONObj *obj);
+void decode_json_obj(bool& val, JSONObj *obj);
+void decode_json_obj(bufferlist& val, JSONObj *obj);
+class utime_t;
+void decode_json_obj(utime_t& val, JSONObj *obj);
+
+template<class T>
+void decode_json_obj(list<T>& l, JSONObj *obj)
+{
+ l.clear();
+
+ JSONObjIter iter = obj->find_first();
+
+ for (; !iter.end(); ++iter) {
+ T val;
+ JSONObj *o = *iter;
+ decode_json_obj(val, o);
+ l.push_back(val);
+ }
+}
+
+template<class T>
+void decode_json_obj(deque<T>& l, JSONObj *obj)
+{
+ l.clear();
+
+ JSONObjIter iter = obj->find_first();
+
+ for (; !iter.end(); ++iter) {
+ T val;
+ JSONObj *o = *iter;
+ decode_json_obj(val, o);
+ l.push_back(val);
+ }
+}
+
+template<class T>
+void decode_json_obj(set<T>& l, JSONObj *obj)
+{
+ l.clear();
+
+ JSONObjIter iter = obj->find_first();
+
+ for (; !iter.end(); ++iter) {
+ T val;
+ JSONObj *o = *iter;
+ decode_json_obj(val, o);
+ l.insert(val);
+ }
+}
+
+template<class T>
+void decode_json_obj(vector<T>& l, JSONObj *obj)
+{
+ l.clear();
+
+ JSONObjIter iter = obj->find_first();
+
+ for (; !iter.end(); ++iter) {
+ T val;
+ JSONObj *o = *iter;
+ decode_json_obj(val, o);
+ l.push_back(val);
+ }
+}
+
+template<class K, class V, class C = std::less<K> >
+void decode_json_obj(map<K, V, C>& m, JSONObj *obj)
+{
+ m.clear();
+
+ JSONObjIter iter = obj->find_first();
+
+ for (; !iter.end(); ++iter) {
+ K key;
+ V val;
+ JSONObj *o = *iter;
+ JSONDecoder::decode_json("key", key, o);
+ JSONDecoder::decode_json("val", val, o);
+ m[key] = val;
+ }
+}
+
+template<class K, class V>
+void decode_json_obj(multimap<K, V>& m, JSONObj *obj)
+{
+ m.clear();
+
+ JSONObjIter iter = obj->find_first();
+
+ for (; !iter.end(); ++iter) {
+ K key;
+ V val;
+ JSONObj *o = *iter;
+ JSONDecoder::decode_json("key", key, o);
+ JSONDecoder::decode_json("val", val, o);
+ m.insert(make_pair(key, val));
+ }
+}
+
+template<class K, class V>
+void decode_json_obj(boost::container::flat_map<K, V>& m, JSONObj *obj)
+{
+ m.clear();
+
+ JSONObjIter iter = obj->find_first();
+
+ for (; !iter.end(); ++iter) {
+ K key;
+ V val;
+ JSONObj *o = *iter;
+ JSONDecoder::decode_json("key", key, o);
+ JSONDecoder::decode_json("val", val, o);
+ m[key] = val;
+ }
+}
+template<class C>
+void decode_json_obj(C& container, void (*cb)(C&, JSONObj *obj), JSONObj *obj)
+{
+ container.clear();
+
+ JSONObjIter iter = obj->find_first();
+
+ for (; !iter.end(); ++iter) {
+ JSONObj *o = *iter;
+ cb(container, o);
+ }
+}
+
+template<class T>
+bool JSONDecoder::decode_json(const char *name, T& val, JSONObj *obj, bool mandatory)
+{
+ JSONObjIter iter = obj->find_first(name);
+ if (iter.end()) {
+ if (mandatory) {
+ string s = "missing mandatory field " + string(name);
+ throw err(s);
+ }
+ val = T();
+ return false;
+ }
+
+ try {
+ decode_json_obj(val, *iter);
+ } catch (err& e) {
+ string s = string(name) + ": ";
+ s.append(e.message);
+ throw err(s);
+ }
+
+ return true;
+}
+
+template<class C>
+bool JSONDecoder::decode_json(const char *name, C& container, void (*cb)(C&, JSONObj *), JSONObj *obj, bool mandatory)
+{
+ container.clear();
+
+ JSONObjIter iter = obj->find_first(name);
+ if (iter.end()) {
+ if (mandatory) {
+ string s = "missing mandatory field " + string(name);
+ throw err(s);
+ }
+ return false;
+ }
+
+ try {
+ decode_json_obj(container, cb, *iter);
+ } catch (err& e) {
+ string s = string(name) + ": ";
+ s.append(e.message);
+ throw err(s);
+ }
+
+ return true;
+}
+
+template<class T>
+void JSONDecoder::decode_json(const char *name, T& val, const T& default_val, JSONObj *obj)
+{
+ JSONObjIter iter = obj->find_first(name);
+ if (iter.end()) {
+ val = default_val;
+ return;
+ }
+
+ try {
+ decode_json_obj(val, *iter);
+ } catch (err& e) {
+ val = default_val;
+ string s = string(name) + ": ";
+ s.append(e.message);
+ throw err(s);
+ }
+}
+
+template<class T>
+bool JSONDecoder::decode_json(const char *name, boost::optional<T>& val, JSONObj *obj, bool mandatory)
+{
+ JSONObjIter iter = obj->find_first(name);
+ if (iter.end()) {
+ if (mandatory) {
+ string s = "missing mandatory field " + string(name);
+ throw err(s);
+ }
+ val = boost::none;
+ return false;
+ }
+
+ try {
+ val.reset(T());
+ decode_json_obj(val.get(), *iter);
+ } catch (err& e) {
+ val.reset();
+ string s = string(name) + ": ";
+ s.append(e.message);
+ throw err(s);
+ }
+
+ return true;
+}
+
+template<class T>
+static void encode_json(const char *name, const T& val, ceph::Formatter *f)
+{
+ f->open_object_section(name);
+ val.dump(f);
+ f->close_section();
+}
+
+class utime_t;
+
+void encode_json(const char *name, const string& val, ceph::Formatter *f);
+void encode_json(const char *name, const char *val, ceph::Formatter *f);
+void encode_json(const char *name, bool val, ceph::Formatter *f);
+void encode_json(const char *name, int val, ceph::Formatter *f);
+void encode_json(const char *name, unsigned val, ceph::Formatter *f);
+void encode_json(const char *name, long val, ceph::Formatter *f);
+void encode_json(const char *name, unsigned long val, ceph::Formatter *f);
+void encode_json(const char *name, long long val, ceph::Formatter *f);
+void encode_json(const char *name, const utime_t& val, ceph::Formatter *f);
+void encode_json(const char *name, const bufferlist& bl, ceph::Formatter *f);
+void encode_json(const char *name, long long unsigned val, ceph::Formatter *f);
+
+template<class T>
+static void encode_json(const char *name, const std::list<T>& l, ceph::Formatter *f)
+{
+ f->open_array_section(name);
+ for (typename std::list<T>::const_iterator iter = l.begin(); iter != l.end(); ++iter) {
+ encode_json("obj", *iter, f);
+ }
+ f->close_section();
+}
+
+template<class T>
+static void encode_json(const char *name, const std::deque<T>& l, ceph::Formatter *f)
+{
+ f->open_array_section(name);
+ for (typename std::deque<T>::const_iterator iter = l.begin(); iter != l.end(); ++iter) {
+ encode_json("obj", *iter, f);
+ }
+ f->close_section();
+}
+
+template<class T, class Compare = std::less<T> >
+static void encode_json(const char *name, const std::set<T, Compare>& l, ceph::Formatter *f)
+{
+ f->open_array_section(name);
+ for (typename std::set<T, Compare>::const_iterator iter = l.begin(); iter != l.end(); ++iter) {
+ encode_json("obj", *iter, f);
+ }
+ f->close_section();
+}
+
+template<class T>
+static void encode_json(const char *name, const std::vector<T>& l, ceph::Formatter *f)
+{
+ f->open_array_section(name);
+ for (typename std::vector<T>::const_iterator iter = l.begin(); iter != l.end(); ++iter) {
+ encode_json("obj", *iter, f);
+ }
+ f->close_section();
+}
+
+template<class K, class V, class C = std::less<K>>
+static void encode_json(const char *name, const std::map<K, V, C>& m, ceph::Formatter *f)
+{
+ f->open_array_section(name);
+ for (typename std::map<K, V, C>::const_iterator i = m.begin(); i != m.end(); ++i) {
+ f->open_object_section("entry");
+ encode_json("key", i->first, f);
+ encode_json("val", i->second, f);
+ f->close_section();
+ }
+ f->close_section();
+}
+
+template<class K, class V>
+static void encode_json(const char *name, const std::multimap<K, V>& m, ceph::Formatter *f)
+{
+ f->open_array_section(name);
+ for (typename std::multimap<K, V>::const_iterator i = m.begin(); i != m.end(); ++i) {
+ f->open_object_section("entry");
+ encode_json("key", i->first, f);
+ encode_json("val", i->second, f);
+ f->close_section();
+ }
+ f->close_section();
+}
+
+template<class K, class V>
+static void encode_json(const char *name, const boost::container::flat_map<K, V>& m, ceph::Formatter *f)
+{
+ f->open_array_section(name);
+ for (auto i = m.begin(); i != m.end(); ++i) {
+ f->open_object_section("entry");
+ encode_json("key", i->first, f);
+ encode_json("val", i->second, f);
+ f->close_section();
+ }
+ f->close_section();
+}
+
+template<class K, class V>
+void encode_json_map(const char *name, const map<K, V>& m, ceph::Formatter *f)
+{
+ f->open_array_section(name);
+ typename map<K,V>::const_iterator iter;
+ for (iter = m.begin(); iter != m.end(); ++iter) {
+ encode_json("obj", iter->second, f);
+ }
+ f->close_section();
+}
+
+
+template<class K, class V>
+void encode_json_map(const char *name, const char *index_name,
+ const char *object_name, const char *value_name,
+ void (*cb)(const char *, const V&, ceph::Formatter *, void *), void *parent,
+ const map<K, V>& m, ceph::Formatter *f)
+{
+ f->open_array_section(name);
+ typename map<K,V>::const_iterator iter;
+ for (iter = m.begin(); iter != m.end(); ++iter) {
+ if (index_name) {
+ f->open_object_section("key_value");
+ f->dump_string(index_name, iter->first);
+ }
+
+ if (object_name) {
+ f->open_object_section(object_name);
+ }
+
+ if (cb) {
+ cb(value_name, iter->second, f, parent);
+ } else {
+ encode_json(value_name, iter->second, f);
+ }
+
+ if (object_name) {
+ f->close_section();
+ }
+ if (index_name) {
+ f->close_section();
+ }
+ }
+ f->close_section();
+}
+
+template<class K, class V>
+void encode_json_map(const char *name, const char *index_name,
+ const char *object_name, const char *value_name,
+ const map<K, V>& m, ceph::Formatter *f)
+{
+ encode_json_map<K, V>(name, index_name, object_name, value_name, NULL, NULL, m, f);
+}
+
+template<class K, class V>
+void encode_json_map(const char *name, const char *index_name, const char *value_name,
+ const map<K, V>& m, ceph::Formatter *f)
+{
+ encode_json_map<K, V>(name, index_name, NULL, value_name, NULL, NULL, m, f);
+}
+
+class JSONFormattable : public ceph::JSONFormatter {
+ JSONObj::data_val value;
+ vector<JSONFormattable> arr;
+ map<std::string, JSONFormattable> obj;
+
+ vector<JSONFormattable *> enc_stack;
+ JSONFormattable *cur_enc;
+
+protected:
+ bool handle_value(const char *name, std::string_view s, bool quoted) override;
+ bool handle_open_section(const char *name, const char *ns, bool section_is_array) override;
+ bool handle_close_section() override;
+
+public:
+ JSONFormattable(bool p = false) : JSONFormatter(p) {
+ cur_enc = this;
+ enc_stack.push_back(cur_enc);
+ }
+
+ enum Type {
+ FMT_NONE,
+ FMT_VALUE,
+ FMT_ARRAY,
+ FMT_OBJ,
+ } type{FMT_NONE};
+
+ void set_type(Type t) {
+ type = t;
+ }
+
+ void decode_json(JSONObj *jo) {
+ if (jo->is_array()) {
+ set_type(JSONFormattable::FMT_ARRAY);
+ decode_json_obj(arr, jo);
+ } else if (jo->is_object()) {
+ set_type(JSONFormattable::FMT_OBJ);
+ auto iter = jo->find_first();
+ for (;!iter.end(); ++iter) {
+ JSONObj *field = *iter;
+ decode_json_obj(obj[field->get_name()], field);
+ }
+ } else {
+ set_type(JSONFormattable::FMT_VALUE);
+ decode_json_obj(value, jo);
+ }
+ }
+
+ void encode(bufferlist& bl) const {
+ ENCODE_START(2, 1, bl);
+ encode((uint8_t)type, bl);
+ encode(value.str, bl);
+ encode(arr, bl);
+ encode(obj, bl);
+ encode(value.quoted, bl);
+ ENCODE_FINISH(bl);
+ }
+
+ void decode(bufferlist::const_iterator& bl) {
+ DECODE_START(2, bl);
+ uint8_t t;
+ decode(t, bl);
+ type = (Type)t;
+ decode(value.str, bl);
+ decode(arr, bl);
+ decode(obj, bl);
+ if (struct_v >= 2) {
+ decode(value.quoted, bl);
+ } else {
+ value.quoted = true;
+ }
+ DECODE_FINISH(bl);
+ }
+
+ const std::string& val() const {
+ return value.str;
+ }
+
+ int val_int() const;
+ long val_long() const;
+ long long val_long_long() const;
+ bool val_bool() const;
+
+ const map<std::string, JSONFormattable> object() const {
+ return obj;
+ }
+
+ const vector<JSONFormattable>& array() const {
+ return arr;
+ }
+
+ const JSONFormattable& operator[](const std::string& name) const;
+ const JSONFormattable& operator[](size_t index) const;
+
+ JSONFormattable& operator[](const std::string& name);
+ JSONFormattable& operator[](size_t index);
+
+ operator std::string() const {
+ return value.str;
+ }
+
+ explicit operator int() const {
+ return val_int();
+ }
+
+ explicit operator long() const {
+ return val_long();
+ }
+
+ explicit operator long long() const {
+ return val_long_long();
+ }
+
+ explicit operator bool() const {
+ return val_bool();
+ }
+
+ template<class T>
+ T operator[](const std::string& name) const {
+ return this->operator[](name)(T());
+ }
+
+ template<class T>
+ T operator[](const std::string& name) {
+ return this->operator[](name)(T());
+ }
+
+ string operator ()(const char *def_val) const {
+ return def(string(def_val));
+ }
+
+ int operator()(int def_val) const {
+ return def(def_val);
+ }
+
+ bool operator()(bool def_val) const {
+ return def(def_val);
+ }
+
+ bool exists(const string& name) const;
+ bool exists(size_t index) const;
+
+ std::string def(const std::string& def_val) const;
+ int def(int def_val) const;
+ bool def(bool def_val) const;
+
+ bool find(const std::string& name, std::string *val) const;
+
+ std::string get(const std::string& name, const std::string& def_val) const;
+
+ int get_int(const std::string& name, int def_val) const;
+ bool get_bool(const std::string& name, bool def_val) const;
+
+ int set(const string& name, const string& val);
+ int erase(const string& name);
+
+ void derive_from(const JSONFormattable& jf);
+
+ void encode_json(const char *name, Formatter *f) const;
+
+ bool is_array() const {
+ return (type == FMT_ARRAY);
+ }
+};
+WRITE_CLASS_ENCODER(JSONFormattable)
+
+void encode_json(const char *name, const JSONFormattable& v, Formatter *f);
+
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-27 07:46:23 +0000