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/*
* The MIT License (MIT)
*
* Copyright (c) 2015-2017 Nicholas Fraser
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
// The code that checks that object keys are strings just uses
// RAPIDJSON_ASSERT(). We define it to nothing to disable this
// so we can write non-string keys in debug mode. (We actually
// never call Key(), and always write whatever type we want.)
#define RAPIDJSON_ASSERT(x) ((void)(x))
#include "common.h"
#define HEX_PREFIX_BYTE_COUNT 8
#define BIN_EXT_DESCRIPTION_LENGTH 64
using namespace rapidjson;
typedef enum continuous_mode_t {
continuous_off = 0,
continuous_undelimited,
continuous_delimited
} continuous_mode_t;
typedef struct options_t {
const char* command;
const char* out_filename;
const char* in_filename;
continuous_mode_t continuous_mode;
char continuous_mode_delimiter;
bool debug;
bool pretty;
bool base64;
bool base64_prefix;
} options_t;
// Reads MessagePack string bytes and outputs a JSON string
template <class WriterType>
static bool string(mpack_reader_t* reader, WriterType& writer, options_t* options, uint32_t len) {
if (mpack_should_read_bytes_inplace(reader, len)) {
const char* str = mpack_read_bytes_inplace(reader, len);
if (mpack_reader_error(reader) != mpack_ok) {
fprintf(stderr, "%s: error reading string bytes\n", options->command);
return false;
}
bool ok = writer.String(str, len);
mpack_done_str(reader);
return ok;
}
char* str = (char*)malloc(len);
mpack_read_bytes(reader, str, len);
if (mpack_reader_error(reader) != mpack_ok) {
fprintf(stderr, "%s: error reading string bytes\n", options->command);
free(str);
return false;
}
mpack_done_str(reader);
bool ok = writer.String(str, len);
free(str);
return ok;
}
static const char* ext_str = "ext:";
static const char* b64_str = "base64:";
static uint32_t base64_len(uint32_t len) {
return ((len + 3) * 4) / 3; // TODO check this
}
// Converts MessagePack bin/ext bytes to JSON base64 string
template <class WriterType>
static bool base64(mpack_reader_t* reader, WriterType& writer, options_t* options, uint32_t len, char* output, char* p, bool prefix) {
if (prefix) {
memcpy(p, b64_str, strlen(b64_str));
p += strlen(b64_str);
}
base64_encodestate state;
base64_init_encodestate(&state);
while (len > 0) {
char buf[4096];
uint32_t count = (len < sizeof(buf)) ? len : sizeof(buf);
len -= count;
mpack_read_bytes(reader, buf, count);
if (mpack_reader_error(reader) != mpack_ok) {
fprintf(stderr, "%s: error reading base64 bytes\n", options->command);
return false;
}
p += base64_encode_block(buf, (int)count, p, &state);
}
p += base64_encode_blockend(p, &state);
return writer.String(output, p - output);
}
// Reads MessagePack bin bytes and outputs a JSON base64 string
template <class WriterType>
static bool base64_bin(mpack_reader_t* reader, WriterType& writer, options_t* options, uint32_t len, bool prefix) {
uint32_t new_len = base64_len(len) + (prefix ? strlen(b64_str) : 0);
char* output = (char*)malloc(new_len);
bool ret = base64(reader, writer, options, len, output, output, prefix);
mpack_done_bin(reader);
free(output);
return ret;
}
// Reads MessagePack ext bytes and outputs a JSON base64 string
template <class WriterType>
static bool base64_ext(mpack_reader_t* reader, WriterType& writer, options_t* options, int8_t exttype, uint32_t len) {
uint32_t new_len = base64_len(len) + strlen(ext_str) + 5 + strlen(b64_str);
char* output = (char*)malloc(new_len);
char* p = output;
strcpy(p, ext_str);
p += strlen(ext_str);
sprintf(p, "%i", exttype);
p += strlen(p);
*p++ = ':';
bool ret = base64(reader, writer, options, len, output, p, true);
mpack_done_ext(reader);
free(output);
return ret;
}
static char hex_char(uint8_t value) {
return (value < 10) ? ('0' + value) : ('A' + (value - 10));
}
static void append_hex_prefix(mpack_reader_t* reader, uint32_t length, char* buf, size_t size) {
// need room for a space, a null-terminator, a closing brace, and ellipses.
// there's no reason the buffer should be too small but we check for safety
// anyway.
if (size == 0)
abort();
if (size < 6) {
buf[0] = '\0';
return;
}
// if there's no data, we close right away.
if (length == 0) {
strcpy(buf, ">");
return;
}
// otherwise we add an opening space
*buf++ = ' ';
// read the prefix
uint32_t prefix_length = (length > HEX_PREFIX_BYTE_COUNT) ? HEX_PREFIX_BYTE_COUNT : length;
char prefix[HEX_PREFIX_BYTE_COUNT * 2];
mpack_read_bytes(reader, prefix, prefix_length);
// append it to the string
for (uint32_t i = 0; i < prefix_length; ++i) {
// need enough room for two hex digits plus the five closing digits
if (size < 7)
break;
uint8_t b = (uint8_t)prefix[i];
*buf++ = hex_char((b >> 4) & 0xf);
*buf++ = hex_char(b & 0xf);
}
// close the element
if (length - prefix_length > 0) {
*buf++ = '.';
*buf++ = '.';
*buf++ = '.';
}
*buf++ = '>';
*buf++ = '\0';
// skip the rest of the bin/ext
mpack_skip_bytes(reader, length - prefix_length);
}
static void describe_bin(mpack_reader_t* reader, uint32_t length, char* buf, size_t buf_size) {
snprintf(buf, buf_size, "<bin size:%u", length);
append_hex_prefix(reader, length, buf + strlen(buf), buf_size - strlen(buf));
mpack_done_bin(reader);
}
static void describe_ext(mpack_reader_t* reader, int8_t exttype, uint32_t length, char* buf, size_t buf_size) {
snprintf(buf, buf_size, "<ext type:%i size:%u", exttype, length);
append_hex_prefix(reader, length, buf + strlen(buf), buf_size - strlen(buf));
mpack_done_ext(reader);
}
template <class WriterType>
static bool element(mpack_reader_t* reader, WriterType& writer, options_t* options) {
const mpack_tag_t tag = mpack_read_tag(reader);
if (mpack_reader_error(reader) != mpack_ok)
return false;
switch (tag.type) {
case mpack_type_bool: return writer.Bool(tag.v.b);
case mpack_type_nil: return writer.Null();
case mpack_type_int: return writer.Int64(tag.v.i);
case mpack_type_uint: return writer.Uint64(tag.v.u);
case mpack_type_float: return writer.Double((double)tag.v.f);
case mpack_type_double: return writer.Double(tag.v.d);
case mpack_type_str:
return string(reader, writer, options, tag.v.l);
case mpack_type_bin:
if (options->base64) {
return base64_bin(reader, writer, options, tag.v.l, options->base64_prefix);
} else if (options->debug) {
char buf[BIN_EXT_DESCRIPTION_LENGTH];
describe_bin(reader, tag.v.l, buf, sizeof(buf));
return writer.RawValue(buf, strlen(buf), kStringType);
} else {
fprintf(stderr,
"%s: bin unencodable in JSON. Try debug viewing mode (-d) or base64 mode (-b or -B).\n",
options->command);
mpack_reader_flag_error(reader, mpack_error_data);
return false;
}
case mpack_type_ext:
if (options->base64) {
return base64_ext(reader, writer, options, tag.exttype, tag.v.l);
} else if (options->debug) {
char buf[BIN_EXT_DESCRIPTION_LENGTH];
describe_ext(reader, tag.exttype, tag.v.l, buf, sizeof(buf));
return writer.RawValue(buf, strlen(buf), kStringType);
} else {
fprintf(stderr,
"%s: ext type %i unencodable in JSON. Try debug viewing mode (-d) or base64 mode (-b or -B)\n",
options->command, tag.exttype);
mpack_reader_flag_error(reader, mpack_error_data);
return false;
}
case mpack_type_array:
if (!writer.StartArray())
return false;
for (size_t i = 0; i < tag.v.l; ++i)
if (!element(reader, writer, options))
return false;
mpack_done_array(reader);
return writer.EndArray();
case mpack_type_map:
if (!writer.StartObject())
return false;
for (size_t i = 0; i < tag.v.l; ++i) {
if (options->debug) {
element(reader, writer, options);
} else {
uint32_t len = mpack_expect_str(reader);
if (mpack_reader_error(reader) != mpack_ok) {
fprintf(stderr, "%s: map key is not a string. Try debug viewing mode (-d)\n", options->command);
return false;
}
if (!string(reader, writer, options, len))
return false;
}
if (!element(reader, writer, options))
return false;
}
mpack_done_map(reader);
return writer.EndObject();
}
return true;
}
template <class WriterType>
static bool convert_all_elements(mpack_reader_t* reader, WriterType& writer, FileWriteStream& stream, options_t* options) {
do {
// Convert an element
if (!element(reader, writer, options))
return false;
// If we're not in continuous mode, we're done
if (options->continuous_mode == continuous_off)
return true;
// See if there's more. An EOF error at this point is OK since we're
// between elements. EOF at any other time fails conversion.
mpack_peek_tag(reader);
if (mpack_reader_error(reader) == mpack_error_eof)
return true;
// Output a delimiter
if (options->continuous_mode == continuous_delimited)
stream.Put(options->continuous_mode_delimiter);
if (options->pretty)
stream.Put('\n');
} while (true);
}
static bool convert(options_t* options) {
// Open input file with MPack
mpack_reader_t reader;
if (options->in_filename)
mpack_reader_init_file(&reader, options->in_filename);
else
mpack_reader_init_stdfile(&reader, stdin, true);
// Open output file for RapidJSON
static FILE* out_file = NULL;
if (options->out_filename) {
out_file = fopen(options->out_filename, "wb");
if (out_file == NULL) {
fprintf(stderr, "%s: could not open \"%s\" for writing.\n", options->command, options->out_filename);
mpack_reader_destroy(&reader);
return false;
}
} else {
out_file = stdout;
}
bool ret;
char* buffer = (char*)malloc(BUFFER_SIZE);
{
FileWriteStream stream(out_file, buffer, BUFFER_SIZE);
if (options->pretty) {
{
PrettyWriter<FileWriteStream> writer(stream);
ret = convert_all_elements(&reader, writer, stream, options);
}
// RapidJSON's PrettyWriter does not add a final
// newline at the end of the JSON
stream.Put('\n');
stream.Flush();
} else {
Writer<FileWriteStream> writer(stream);
ret = convert_all_elements(&reader, writer, stream, options);
}
}
free(buffer);
mpack_error_t error = mpack_reader_destroy(&reader);
fclose(out_file);
if (!ret)
fprintf(stderr, "%s: parse error: %s (%i)\n", options->command,
mpack_error_to_string(error), (int)error);
return ret;
}
static void usage(const char* command) {
fprintf(stderr, "Usage: %s [-dpbB] [-i <infile>] [-o <outfile>]\n", command);
fprintf(stderr, "Options:\n");
fprintf(stderr, " -i <infile> Input filename (default stdin)\n");
fprintf(stderr, " -o <outfile> Output filename (default stdout)\n");
fprintf(stderr, " -d Debug viewing mode, output pseudo-JSON instead of aborting with error\n");
fprintf(stderr, " -p Output pretty-printed JSON\n");
fprintf(stderr, " -b Convert bin to base64 string with \"base64:\" prefix\n");
fprintf(stderr, " -B Convert bin to base64 string with no prefix\n");
fprintf(stderr, " -c Continuous mode, no delimiter\n");
fprintf(stderr, " -C Continuous mode, comma delimited\n");
fprintf(stderr, " -x <delimiter> Continuous mode, specified delimiter\n");
fprintf(stderr, " -h Print this help\n");
fprintf(stderr, " -v Print version information\n");
fprintf(stderr, "For viewing MessagePack, you probably want -d or -di <filename>.\n");
}
static void version(const char* command) {
fprintf(stderr, "%s version %s -- %s\n", command, VERSION, "https://github.com/ludocode/msgpack-tools");
fprintf(stderr, "MPack version %s -- %s\n", MPACK_VERSION_STRING, "https://github.com/ludocode/mpack");
fprintf(stderr, "RapidJSON version %s -- %s\n", RAPIDJSON_VERSION_STRING, "http://rapidjson.org/");
fprintf(stderr, "libb64 version %s -- %s\n", LIBB64_VERSION, "http://libb64.sourceforge.net/");
}
int main(int argc, char** argv) {
options_t options;
memset(&options, 0, sizeof(options));
options.command = argv[0];
opterr = 0;
int opt;
while ((opt = getopt(argc, argv, "i:o:x:dpbBcChv?")) != -1) {
switch (opt) {
case 'i':
options.in_filename = optarg;
break;
case 'o':
options.out_filename = optarg;
break;
case 'd':
options.debug = true;
options.pretty = true;
break;
case 'p':
options.pretty = true;
break;
case 'b':
options.base64 = true;
options.base64_prefix = true;
break;
case 'B':
options.base64 = true;
options.base64_prefix = false;
break;
case 'c':
if (options.continuous_mode == continuous_delimited) {
fprintf(stderr, "You cannot specify both -c and -C.\n");
usage(options.command);
return EXIT_FAILURE;
}
options.continuous_mode = continuous_undelimited;
break;
case 'C':
if (options.continuous_mode == continuous_undelimited) {
fprintf(stderr, "You cannot specify both -c and -C.\n");
usage(options.command);
return EXIT_FAILURE;
}
options.continuous_mode = continuous_delimited;
options.continuous_mode_delimiter = ',';
break;
case 'x':
if(strlen(optarg) > 1) {
fprintf(stderr, "You cannot have a multicharacter delimiter.\n");
usage(options.command);
return EXIT_FAILURE;
}
options.continuous_mode = continuous_delimited;
options.continuous_mode_delimiter = optarg[0];
break;
case 'h':
usage(options.command);
return EXIT_SUCCESS;
case 'v':
version(options.command);
return EXIT_SUCCESS;
default: /* ? */
if (optopt == 0) {
// we allow both -h and -? as help
usage(options.command);
return EXIT_SUCCESS;
}
if (optopt == 'i' || optopt == 'o')
fprintf(stderr, "%s: option '%c' requires an argument\n", options.command, optopt);
else
fprintf(stderr, "%s: invalid option -- '%c'\n", options.command, optopt);
usage(options.command);
return EXIT_FAILURE;
}
}
if (optind < argc) {
fprintf(stderr, "%s: not an option -- \"%s\"\n", options.command, argv[optind]);
usage(options.command);
return EXIT_FAILURE;
}
return convert(&options) ? EXIT_SUCCESS : EXIT_FAILURE;
}