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d0a55a62b3
This is useful when have have a jsmntok_t. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
388 lines
13 KiB
C
388 lines
13 KiB
C
/* lightningd/json_stream.h
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* Helpers for outputting JSON results into a membuf.
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*/
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#ifndef LIGHTNING_COMMON_JSON_STREAM_H
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#define LIGHTNING_COMMON_JSON_STREAM_H
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#include "config.h"
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#define JSMN_STRICT 1
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# include <external/jsmn/jsmn.h>
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#include <ccan/short_types/short_types.h>
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#include <ccan/tal/tal.h>
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#include <ccan/time/time.h>
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#include <common/amount.h>
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#include <common/errcode.h>
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struct command;
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struct io_conn;
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struct log;
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struct json_escape;
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struct pubkey;
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struct point32;
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struct bip340sig;
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struct secret;
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struct node_id;
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struct channel_id;
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struct bitcoin_txid;
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struct bitcoin_outpoint;
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struct short_channel_id;
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struct sha256;
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struct preimage;
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struct bitcoin_tx;
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struct wally_psbt;
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struct lease_rates;
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struct wireaddr;
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struct wireaddr_internal;
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struct json_stream {
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struct json_out *jout;
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/* Who is writing to this buffer now; NULL if nobody is. */
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struct command *writer;
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/* Who is io_writing from this buffer now: NULL if nobody is. */
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struct io_conn *reader;
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struct io_plan *(*reader_cb)(struct io_conn *conn,
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struct json_stream *js,
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void *arg);
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void *reader_arg;
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size_t len_read;
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/* Where to log I/O */
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struct log *log;
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};
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/**
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* new_json_stream - create a new JSON stream.
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* @ctx: tal context for allocation.
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* @writer: object responsible for writing to this stream.
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* @log: where to log the IO
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*/
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struct json_stream *new_json_stream(const tal_t *ctx, struct command *writer,
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struct log *log);
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/**
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* Duplicate an existing stream.
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*
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* Mostly useful when we want to send copies of a given stream to
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* multiple recipients, that might read at different speeds from the
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* stream. For example this is used when construcing a single
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* notification and then duplicating it for the fanout.
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*
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* @ctx: tal context for allocation.
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* @original: the stream to duplicate.
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* @log: log for new stream.
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*/
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struct json_stream *json_stream_dup(const tal_t *ctx,
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struct json_stream *original,
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struct log *log);
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/**
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* json_stream_close - finished writing to a JSON stream.
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* @js: the json_stream.
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* @writer: object responsible for writing to this stream.
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*/
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void json_stream_close(struct json_stream *js, struct command *writer);
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/* For low-level JSON stream access: */
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void json_stream_log_suppress(struct json_stream *js, const char *cmd_name);
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/* '"fieldname" : [ ' or '[ ' if fieldname is NULL */
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void json_array_start(struct json_stream *js, const char *fieldname);
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/* '"fieldname" : { ' or '{ ' if fieldname is NULL */
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void json_object_start(struct json_stream *ks, const char *fieldname);
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/* '],' */
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void json_array_end(struct json_stream *js);
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/* '},' */
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void json_object_end(struct json_stream *js);
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/**
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* json_stream_append - literally insert this string into the json_stream.
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* @js: the json_stream.
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* @str: the string.
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* @len: the length to append (<= strlen(str)).
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*/
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void json_stream_append(struct json_stream *js, const char *str, size_t len);
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/**
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* json_add_primitive_fmt - add an unquoted literal member.
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* @js: the json_stream.
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* @fieldname: fieldname (if in object), otherwise must be NULL.
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* @fmt...: the printf-style format
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*/
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void json_add_primitive_fmt(struct json_stream *js,
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const char *fieldname,
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const char *fmt, ...) PRINTF_FMT(3,4);
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/**
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* json_add_primitive - add an unquoted literal member.
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* @js: the json_stream.
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* @fieldname: fieldname (if in object), otherwise must be NULL.
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* @val: the primitive
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*/
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void json_add_primitive(struct json_stream *js,
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const char *fieldname,
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const char *val TAKES);
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/**
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* json_add_str_fmt - add a string member (printf-style).
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* @js: the json_stream.
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* @fieldname: fieldname (if in object), otherwise must be NULL.
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* @fmt...: the printf-style format
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*/
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void json_add_str_fmt(struct json_stream *js,
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const char *fieldname,
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const char *fmt, ...) PRINTF_FMT(3,4);
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/**
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* json_add_string - add a string member.
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* @js: the json_stream.
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* @fieldname: fieldname (if in object), otherwise must be NULL.
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* @str: the string
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*/
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void json_add_string(struct json_stream *js,
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const char *fieldname,
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const char *str TAKES);
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/* '"fieldname" : "value"' or '"value"' if fieldname is NULL. String must
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* already be JSON escaped as necessary. */
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void json_add_escaped_string(struct json_stream *result,
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const char *fieldname,
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const struct json_escape *esc TAKES);
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/**
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* json_add_jsonstr - add a JSON entity in a string that is already
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* JSON-formatted.
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* @js: the json_stream.
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* @fieldname: fieldname (if in object), otherwise must be NULL.
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* @jsonstr: the JSON entity
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* @jsonstrlen: the length of @jsonstr
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*/
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void json_add_jsonstr(struct json_stream *js,
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const char *fieldname,
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const char *jsonstr,
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size_t jsonstrlen);
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/**
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* json_stream_output - start writing out a json_stream to this conn.
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* @js: the json_stream
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* @conn: the io_conn to write out to.
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* @cb: the callback to call once it's all written.
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* @arg: the argument to @cb
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*/
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#define json_stream_output(js, conn, cb, arg) \
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json_stream_output_((js), (conn), \
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typesafe_cb_preargs(struct io_plan *, \
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void *, \
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(cb), (arg), \
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struct io_conn *, \
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struct json_stream *), \
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(arg))
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struct io_plan *json_stream_output_(struct json_stream *js,
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struct io_conn *conn,
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struct io_plan *(*cb)(struct io_conn *conn,
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struct json_stream *js,
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void *arg),
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void *arg);
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/* Ensure there's a double \n after a JSON response. */
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void json_stream_double_cr(struct json_stream *js);
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void json_stream_flush(struct json_stream *js);
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/* '"fieldname" : "value"' or '"value"' if fieldname is NULL. Turns
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* any non-printable chars into JSON escapes, but leaves existing escapes alone.
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*/
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void json_add_string(struct json_stream *result, const char *fieldname, const char *value);
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/* '"fieldname" : "value[:value_len]"' or '"value[:value_len]"' if
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* fieldname is NULL. Turns any non-printable chars into JSON
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* escapes, but leaves existing escapes alone.
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*/
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void json_add_stringn(struct json_stream *result, const char *fieldname,
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const char *value TAKES, size_t value_len);
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/* '"fieldname" : "value"' or '"value"' if fieldname is NULL. String must
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* already be JSON escaped as necessary. */
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void json_add_escaped_string(struct json_stream *result,
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const char *fieldname,
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const struct json_escape *esc TAKES);
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/* '"fieldname" : literal' or 'literal' if fieldname is NULL*/
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void json_add_literal(struct json_stream *result, const char *fieldname,
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const char *literal, int len);
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/* '"fieldname" : value' or 'value' if fieldname is NULL */
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void json_add_num(struct json_stream *result, const char *fieldname,
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unsigned int value);
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/* '"fieldname" : value' or 'value' if fieldname is NULL */
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void json_add_u64(struct json_stream *result, const char *fieldname,
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uint64_t value);
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/* '"fieldname" : value' or 'value' if fieldname is NULL */
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void json_add_s64(struct json_stream *result, const char *fieldname,
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int64_t value);
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/* '"fieldname" : value' or 'value' if fieldname is NULL */
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void json_add_u32(struct json_stream *result, const char *fieldname,
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uint32_t value);
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/* '"fieldname" : value' or 'value' if fieldname is NULL */
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void json_add_s32(struct json_stream *result, const char *fieldname,
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int32_t value);
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/* '"fieldname" : true|false' or 'true|false' if fieldname is NULL */
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void json_add_bool(struct json_stream *result, const char *fieldname,
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bool value);
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/* '"fieldname" : null' or 'null' if fieldname is NULL */
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void json_add_null(struct json_stream *stream, const char *fieldname);
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/* '"fieldname" : "0189abcdef..."' or "0189abcdef..." if fieldname is NULL */
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void json_add_hex(struct json_stream *result, const char *fieldname,
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const void *data, size_t len);
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/* '"fieldname" : "0189abcdef..."' or "0189abcdef..." if fieldname is NULL */
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void json_add_hex_talarr(struct json_stream *result,
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const char *fieldname,
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const tal_t *data);
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void json_add_timeabs(struct json_stream *result, const char *fieldname,
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struct timeabs t);
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/* used in log.c and notification.c*/
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void json_add_time(struct json_stream *result, const char *fieldname,
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struct timespec ts);
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/* Add ISO_8601 timestamp string, i.e. "2019-09-07T15:50+01:00" */
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void json_add_timeiso(struct json_stream *result,
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const char *fieldname,
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struct timeabs *time);
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/* Add any json token */
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void json_add_tok(struct json_stream *result, const char *fieldname,
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const jsmntok_t *tok, const char *buffer);
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/* Add an error code */
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void json_add_errcode(struct json_stream *result, const char *fieldname,
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errcode_t code);
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/* Add "bolt11" or "bolt12" field, depending on invstring. */
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void json_add_invstring(struct json_stream *result, const char *invstring);
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/* '"fieldname" : "0289abcdef..."' or "0289abcdef..." if fieldname is NULL */
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void json_add_pubkey(struct json_stream *response,
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const char *fieldname,
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const struct pubkey *key);
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/* '"fieldname" : "89abcdef..."' or "89abcdef..." if fieldname is NULL */
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void json_add_point32(struct json_stream *response,
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const char *fieldname,
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const struct point32 *key);
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/* '"fieldname" : "89abcdef..."' or "89abcdef..." if fieldname is NULL */
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void json_add_bip340sig(struct json_stream *response,
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const char *fieldname,
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const struct bip340sig *sig);
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/* '"fieldname" : "89abcdef..."' or "89abcdef..." if fieldname is NULL */
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void json_add_secret(struct json_stream *response,
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const char *fieldname,
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const struct secret *secret);
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/* '"fieldname" : "0289abcdef..."' or "0289abcdef..." if fieldname is NULL */
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void json_add_node_id(struct json_stream *response,
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const char *fieldname,
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const struct node_id *id);
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/* '"fieldname" : "0289abcdef..."' or "0289abcdef..." if fieldname is NULL */
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void json_add_channel_id(struct json_stream *response,
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const char *fieldname,
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const struct channel_id *cid);
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/* '"fieldname" : <hexrev>' or "<hexrev>" if fieldname is NULL */
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void json_add_txid(struct json_stream *result, const char *fieldname,
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const struct bitcoin_txid *txid);
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/* '"fieldname" : "txid:n" */
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void json_add_outpoint(struct json_stream *result, const char *fieldname,
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const struct bitcoin_outpoint *out);
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/* '"fieldname" : "1234:5:6"' */
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void json_add_short_channel_id(struct json_stream *response,
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const char *fieldname,
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const struct short_channel_id *id);
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/* JSON serialize a network address for a node */
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void json_add_address(struct json_stream *response, const char *fieldname,
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const struct wireaddr *addr);
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/* JSON serialize a network address for a node. */
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void json_add_address_internal(struct json_stream *response,
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const char *fieldname,
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const struct wireaddr_internal *addr);
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/* Adds both a 'raw' number field and an 'amount_msat' field */
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void json_add_amount_msat_compat(struct json_stream *result,
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struct amount_msat msat,
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const char *rawfieldname,
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const char *msatfieldname)
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NO_NULL_ARGS;
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/* Adds both a 'raw' number field and an 'amount_msat' field */
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void json_add_amount_sat_compat(struct json_stream *result,
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struct amount_sat sat,
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const char *rawfieldname,
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const char *msatfieldname)
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NO_NULL_ARGS;
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/* Adds an 'msat' field */
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void json_add_amount_msat_only(struct json_stream *result,
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const char *msatfieldname,
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struct amount_msat msat)
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NO_NULL_ARGS;
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/* Adds an 'msat' field */
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void json_add_amount_sat_only(struct json_stream *result,
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const char *msatfieldname,
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struct amount_sat sat)
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NO_NULL_ARGS;
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/* Adds an 'msat' field */
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void json_add_amount_sat_msat(struct json_stream *result,
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const char *msatfieldname,
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struct amount_sat sat)
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NO_NULL_ARGS;
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/* Adds an 'msat' field, and an older deprecated field. */
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void json_add_amount_sats_deprecated(struct json_stream *result,
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const char *fieldname,
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const char *msatfieldname,
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struct amount_sat sat)
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NO_NULL_ARGS;
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/* This is used to create requests, *never* for output (output is always
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* msat!) */
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void json_add_sats(struct json_stream *result,
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const char *fieldname,
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struct amount_sat sat)
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NO_NULL_ARGS;
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void json_add_sha256(struct json_stream *result, const char *fieldname,
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const struct sha256 *hash);
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void json_add_preimage(struct json_stream *result, const char *fieldname,
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const struct preimage *preimage);
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/* '"fieldname" : "010000000001..."' or "010000000001..." if fieldname is NULL */
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void json_add_tx(struct json_stream *result,
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const char *fieldname,
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const struct bitcoin_tx *tx);
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/* '"fieldname" : "cHNidP8BAJoCAAAAAljo..." or "cHNidP8BAJoCAAAAAljo..." if fieldname is NULL */
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void json_add_psbt(struct json_stream *stream,
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const char *fieldname,
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const struct wally_psbt *psbt);
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/* Add fields from the lease_rates to a json stream.
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* Note that field names are set */
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void json_add_lease_rates(struct json_stream *result,
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const struct lease_rates *rates);
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#endif /* LIGHTNING_COMMON_JSON_STREAM_H */
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