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_S52.i
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_S52.i
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// _S52.i: socket, Websocket, DBus, pipe (in progres), .. network interface to S52
//
// SD 2014MAY23
//
// Project: OpENCview
/*
This file is part of the OpENCview project, a viewer of ENC.
Copyright (C) 2000-2018 Sylvain Duclos sduclos@users.sourceforge.net
OpENCview is free software: you can redistribute it and/or modify
it under the terms of the Lesser GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpENCview is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
Lesser GNU General Public License for more details.
You should have received a copy of the Lesser GNU General Public License
along with OpENCview. If not, see <http://www.gnu.org/licenses/>.
*/
// Call the correponding S52_* function named 'method' in JSON object
// here 'method' mean function name
// SL4A call it 'method' since JAVA is OOP
// expect:{"id":<int>,"method":"S52_*","params":["x,y,z,whatever"]}
// return:{"id":<int>,"error":"<no error>|<some error>","result":["x,y,z,whatever"]}
// or "{\"id\":%i,\"error\":\"%s\",\"result\":%s}"
#ifdef S52_USE_SOCK
// -----------------------------------------------------------------
// listen to socket
//
#include <sys/types.h>
#include <sys/socket.h>
#include <gio/gio.h>
#include "parson.h"
#define SOCK_BUF 2048
static gchar _setErr(gchar *err, CCHAR *errmsg)
{
g_snprintf(err, SOCK_BUF, "libS52.so:%s", (gchar*)errmsg);
return TRUE;
}
static int _encode(char *buffer, const char *frmt, ...)
{
va_list argptr;
va_start(argptr, frmt);
int n = g_vsnprintf(buffer, SOCK_BUF, frmt, argptr);
va_end(argptr);
//PRINTF("n:%i\n", n);
if (n < (SOCK_BUF-1)) {
//buffer[n] = '\0';
//buffer[n+1] = '\0';
return TRUE;
} else {
//buffer[SOCK_BUF-1] = '\0';
PRINTF("WARNING: g_vsnprintf(): fail - no space in buffer\n");
return FALSE;
}
}
static int _handleS52method(char *str, char *result, char *err)
{
// FIXME: use btree for name/function lookup
// -OR-
// FIXME: order cmdName by frequency
// reset error string --> 'no error'
err[0] = '\0';
// JSON parser
JSON_Value *val = json_parse_string(str);
if (NULL == val) {
_setErr(err, "can't parse json str");
_encode(result, "[0]");
PRINTF("WARNING: json_parse_string() failed:%s", str);
return 0;
}
// init JSON Object
JSON_Object *obj = json_value_get_object(val);
double id = json_object_get_number(obj, "id");
// get S52_* Command Name
const char *cmdName = json_object_dotget_string(obj, "method");
if (NULL == cmdName) {
_setErr(err, "no cmdName");
_encode(result, "[0]");
goto exit;
}
//PRINTF("JSON cmdName:%s\n", cmdName);
// start work - fetch cmdName parameters
JSON_Array *paramsArr = json_object_get_array(obj, "params");
if (NULL == paramsArr) {
_setErr(err, "no params");
_encode(result, "[0]");
goto exit;
}
// get the number of parameters
size_t count = json_array_get_count(paramsArr);
// FIXME: check param type
// ---------------------------------------------------------------------
//
// call command - return answer to caller
//
//S52ObjectHandle STD S52_newOWNSHP(const char *label);
if (0 == g_strcmp0(cmdName, "S52_newOWNSHP")) {
const char *label = json_array_get_string (paramsArr, 0);
if ((NULL==label) || (1!=count)) {
_setErr(err, "params 'label' not found");
goto exit;
}
S52ObjectHandle objH = S52_newOWNSHP(label);
//_encode(result, "[%lu]", (long unsigned int *) objH);
_encode(result, "[%u]", objH);
goto exit;
}
//S52ObjectHandle STD S52_newVESSEL(int vesrce, const char *label);
if (0 == g_strcmp0(cmdName, "S52_newVESSEL")) {
if (2 != count) {
_setErr(err, "params 'vesrce'/'label' not found");
goto exit;
}
double vesrce = json_array_get_number(paramsArr, 0);
const char *label = json_array_get_string(paramsArr, 1);
if (NULL == label) {
_setErr(err, "params 'label' not found");
goto exit;
}
S52ObjectHandle objH = S52_newVESSEL(vesrce, label);
//_encode(result, "[%lu]", (long unsigned int *) objH);
_encode(result, "[%u]", objH);
//PRINTF("objH: %lu\n", objH);
goto exit;
}
//S52ObjectHandle STD S52_setVESSELlabel(S52ObjectHandle objH, const char *newLabel);
if (0 == g_strcmp0(cmdName, "S52_setVESSELlabel")) {
if (2 != count) {
_setErr(err, "params 'objH'/'newLabel' not found");
goto exit;
}
const char *label = json_array_get_string (paramsArr, 1);
if (NULL == label) {
_setErr(err, "params 'label' not found");
goto exit;
}
long unsigned int lui = (long unsigned int) json_array_get_number(paramsArr, 0);
S52ObjectHandle objH = (S52ObjectHandle) lui;
objH = S52_setVESSELlabel(objH, label);
//_encode(result, "[%lu]", (long unsigned int *) objH);
_encode(result, "[%u]", objH);
goto exit;
}
//S52ObjectHandle STD S52_pushPosition(S52ObjectHandle objH, double latitude, double longitude, double data);
if (0 == g_strcmp0(cmdName, "S52_pushPosition")) {
if (4 != count) {
_setErr(err, "params 'objH'/'latitude'/'longitude'/'data' not found");
goto exit;
}
long unsigned int lui = (long unsigned int) json_array_get_number(paramsArr, 0);
S52ObjectHandle objH = (S52ObjectHandle) lui;
double latitude = json_array_get_number(paramsArr, 1);
double longitude = json_array_get_number(paramsArr, 2);
double data = json_array_get_number(paramsArr, 3);
objH = S52_pushPosition(objH, latitude, longitude, data);
//_encode(result, "[%lu]", (long unsigned int *) objH);
_encode(result, "[%u]", objH);
goto exit;
}
//S52ObjectHandle STD S52_setVector (S52ObjectHandle objH, int vecstb, double course, double speed);
if (0 == g_strcmp0(cmdName, "S52_setVector")) {
if (4 != count) {
_setErr(err, "params 'objH'/'vecstb'/'course'/'speed' not found");
goto exit;
}
long unsigned int lui = (long unsigned int) json_array_get_number(paramsArr, 0);
S52ObjectHandle objH = (S52ObjectHandle) lui;
double vecstb = json_array_get_number(paramsArr, 1);
double course = json_array_get_number(paramsArr, 2);
double speed = json_array_get_number(paramsArr, 3);
objH = S52_setVector(objH, vecstb, course, speed);
//_encode(result, "[%lu]", (long unsigned int *) objH);
_encode(result, "[%u]", objH);
goto exit;
}
//S52ObjectHandle STD S52_setDimension(S52ObjectHandle objH, double a, double b, double c, double d);
if (0 == g_strcmp0(cmdName, "S52_setDimension")) {
if (5 != count) {
_setErr(err, "params 'objH'/'a'/'b'/'c'/'d' not found");
goto exit;
}
long unsigned int lui = (long unsigned int) json_array_get_number(paramsArr, 0);
S52ObjectHandle objH = (S52ObjectHandle) lui;
double a = json_array_get_number(paramsArr, 1);
double b = json_array_get_number(paramsArr, 2);
double c = json_array_get_number(paramsArr, 3);
double d = json_array_get_number(paramsArr, 4);
objH = S52_setDimension(objH, a, b, c, d);
//_encode(result, "[%lu]", (long unsigned int *) objH);
_encode(result, "[%u]", objH);
goto exit;
}
//S52ObjectHandle STD S52_setVESSELstate(S52ObjectHandle objH, int vesselSelect, int vestat, int vesselTurn);
if (0 == g_strcmp0(cmdName, "S52_setVESSELstate")) {
if (4 != count) {
_setErr(err, "params 'objH'/'vesselSelect'/'vestat'/'vesselTurn' not found");
goto exit;
}
long unsigned int lui = (long unsigned int) json_array_get_number(paramsArr, 0);
S52ObjectHandle objH = (S52ObjectHandle) lui;
double vesselSelect = json_array_get_number(paramsArr, 1);
double vestat = json_array_get_number(paramsArr, 2);
double vesselTurn = json_array_get_number(paramsArr, 3);
objH = S52_setVESSELstate(objH, vesselSelect, vestat, vesselTurn);
//_encode(result, "[%lu]", (long unsigned int *) objH);
_encode(result, "[%u]", objH);
goto exit;
}
//S52ObjectHandle STD S52_delMarObj(S52ObjectHandle objH);
if (0 == g_strcmp0(cmdName, "S52_delMarObj")) {
if (1 != count) {
_setErr(err, "params 'objH' not found");
goto exit;
}
long unsigned int lui = (long unsigned int) json_array_get_number(paramsArr, 0);
S52ObjectHandle objH = (S52ObjectHandle) lui;
objH = S52_delMarObj(objH);
//_encode(result, "[%lu]", (long unsigned int *) objH);
_encode(result, "[%u]", objH);
goto exit;
}
// FIXME: not all param parsed
//S52ObjectHandle STD S52_newMarObj(const char *plibObjName, S52ObjectType objType,
// unsigned int xyznbrmax, double *xyz, const char *listAttVal);
if (0 == g_strcmp0(cmdName, "S52_newMarObj")) {
if (3 != count) {
_setErr(err, "params 'plibObjName'/'objType'/'xyznbrmax' not found");
goto exit;
}
const char *plibObjName = json_array_get_string(paramsArr, 0);
//double objType = json_array_get_number(paramsArr, 1);
S52ObjectType objType = (S52ObjectType)json_array_get_number(paramsArr, 1);
double xyznbrmax = json_array_get_number(paramsArr, 2);
double *xyz = NULL;
gchar *listAttVal = NULL;
S52ObjectHandle objH = S52_newMarObj(plibObjName, objType, xyznbrmax, xyz, listAttVal);
// debug
//PRINTF("S52_newMarObj -> objH: %lu\n", (long unsigned int *) objH);
//_encode(result, "[%lu]", (long unsigned int *) objH);
_encode(result, "[%u]", objH);
goto exit;
}
//const char * STD S52_getPalettesNameList(void);
if (0 == g_strcmp0(cmdName, "S52_getPalettesNameList")) {
const char *palListstr = S52_getPalettesNameList();
_encode(result, "[\"%s\"]", palListstr);
//PRINTF("%s", result);
goto exit;
}
//const char * STD S52_getCellNameList(void);
if (0 == g_strcmp0(cmdName, "S52_getCellNameList")) {
const char *cellNmListstr = S52_getCellNameList();
_encode(result, "[\"%s\"]", cellNmListstr);
//PRINTF("%s", result);
goto exit;
}
//double STD S52_getMarinerParam(S52MarinerParameter paramID);
if (0 == g_strcmp0(cmdName, "S52_getMarinerParam")) {
if (1 != count) {
_setErr(err, "params 'paramID' not found");
goto exit;
}
S52MarinerParameter paramID = (S52MarinerParameter)json_array_get_number(paramsArr, 0);
double d = S52_getMarinerParam(paramID);
_encode(result, "[%f]", d);
//PRINTF("%s", result);
goto exit;
}
//int STD S52_setMarinerParam(S52MarinerParameter paramID, double val);
if (0 == g_strcmp0(cmdName, "S52_setMarinerParam")) {
if (2 != count) {
_setErr(err, "params 'paramID'/'val' not found");
goto exit;
}
//double paramID = json_array_get_number(paramsArr, 0);
S52MarinerParameter paramID = (S52MarinerParameter)json_array_get_number(paramsArr, 0);
double val = json_array_get_number(paramsArr, 1);
double d = S52_setMarinerParam(paramID, val);
_encode(result, "[%f]", d);
//PRINTF("%s", result);
goto exit;
}
//DLL int STD S52_drawBlit(double scale_x, double scale_y, double scale_z, double north);
if (0 == g_strcmp0(cmdName, "S52_drawBlit")) {
if (4 != count) {
_setErr(err, "params 'scale_x'/'scale_y'/'scale_z'/'north' not found");
goto exit;
}
double scale_x = json_array_get_number(paramsArr, 0);
double scale_y = json_array_get_number(paramsArr, 1);
double scale_z = json_array_get_number(paramsArr, 2);
double north = json_array_get_number(paramsArr, 3);
int ret = S52_drawBlit(scale_x, scale_y, scale_z, north);
if (TRUE == ret)
_encode(result, "[1]");
else {
_encode(result, "[0]");
}
//PRINTF("SOCK:S52_drawBlit(): %s\n", result);
goto exit;
}
//int STD S52_drawLast(void);
if (0 == g_strcmp0(cmdName, "S52_drawLast")) {
int i = S52_drawLast();
_encode(result, "[%i]", i);
//PRINTF("SOCK:S52_drawLast(): res:%s\n", result);
goto exit;
}
//int STD S52_draw(void);
if (0 == g_strcmp0(cmdName, "S52_draw")) {
int i = S52_draw();
_encode(result, "[%i]", i);
//PRINTF("SOCK:S52_draw(): res:%s\n", result);
goto exit;
}
//int STD S52_getRGB(const char *colorName, unsigned char *R, unsigned char *G, unsigned char *B);
if (0 == g_strcmp0(cmdName, "S52_getRGB")) {
if (1 != count) {
_setErr(err, "params 'colorName' not found");
goto exit;
}
const char *colorName = json_array_get_string(paramsArr, 0);
unsigned char R;
unsigned char G;
unsigned char B;
int ret = S52_getRGB(colorName, &R, &G, &B);
//PRINTF("%i, %i, %i\n", R,G,B);
if (TRUE == ret)
_encode(result, "[%i,%i,%i]", R, G, B);
else
_encode(result, "[0]");
//PRINTF("%s\n", result);
goto exit;
}
//int STD S52_setTextDisp(int dispPrioIdx, int count, int state);
if (0 == g_strcmp0(cmdName, "S52_setTextDisp")) {
if (3 != count) {
_setErr(err, "params 'dispPrioIdx' / 'count' / 'state' not found");
goto exit;
}
double dispPrioIdx = json_array_get_number(paramsArr, 0);
double count = json_array_get_number(paramsArr, 1);
double state = json_array_get_number(paramsArr, 2);
_encode(result, "[%i]", S52_setTextDisp(dispPrioIdx, count, state));
//PRINTF("%s\n", result);
goto exit;
}
//int STD S52_getTextDisp(int dispPrioIdx);
if (0 == g_strcmp0(cmdName, "S52_getTextDisp")) {
if (1 != count) {
_setErr(err, "params 'dispPrioIdx' not found");
goto exit;
}
double dispPrioIdx = json_array_get_number(paramsArr, 0);
_encode(result, "[%i]", S52_getTextDisp(dispPrioIdx));
//PRINTF("%s\n", result);
goto exit;
}
//int STD S52_loadCell (const char *encPath, S52_loadObject_cb loadObject_cb);
if (0 == g_strcmp0(cmdName, "S52_loadCell")) {
if (1 != count) {
_setErr(err, "params 'encPath' not found");
goto exit;
}
const char *encPath = json_array_get_string(paramsArr, 0);
int ret = S52_loadCell(encPath, NULL);
if (TRUE == ret)
_encode(result, "[1]");
else {
_encode(result, "[0]");
}
//PRINTF("%s\n", result);
goto exit;
}
//int STD S52_doneCell (const char *encPath);
if (0 == g_strcmp0(cmdName, "S52_doneCell")) {
if (1 != count) {
_setErr(err, "params 'encPath' not found");
goto exit;
}
const char *encPath = json_array_get_string(paramsArr, 0);
int ret = S52_doneCell(encPath);
if (TRUE == ret)
_encode(result, "[1]");
else {
_encode(result, "[0]");
}
//PRINTF("SOCK:S52_doneCell(): %s\n", result);
goto exit;
}
//const char * STD S52_pickAt(double pixels_x, double pixels_y)
if (0 == g_strcmp0(cmdName, "S52_pickAt")) {
if (2 != count) {
_setErr(err, "params 'pixels_x' or 'pixels_y' not found");
goto exit;
}
double pixels_x = json_array_get_number(paramsArr, 0);
double pixels_y = json_array_get_number(paramsArr, 1);
const char *ret = S52_pickAt(pixels_x, pixels_y);
if (NULL == ret)
_encode(result, "[0]");
else {
_encode(result, "[\"%s\"]", ret);
}
goto exit;
}
// const char * STD S52_getObjList(const char *cellName, const char *className);
if (0 == g_strcmp0(cmdName, "S52_getObjList")) {
if (2 != count) {
_setErr(err, "params 'cellName'/'className' not found");
goto exit;
}
const char *cellName = json_array_get_string (paramsArr, 0);
if (NULL == cellName) {
_setErr(err, "params 'cellName' not found");
goto exit;
}
const char *className = json_array_get_string (paramsArr, 1);
if (NULL == className) {
_setErr(err, "params 'className' not found");
goto exit;
}
const char *str = S52_getObjList(cellName, className);
if (NULL == str)
_encode(result, "[0]");
else
_encode(result, "[\"%s\"]", str);
goto exit;
}
// S52ObjectHandle STD S52_getMarObj(unsigned int S57ID);
if (0 == g_strcmp0(cmdName, "S52_getMarObj")) {
if (1 != count) {
_setErr(err, "params 'S57ID' not found");
goto exit;
}
long unsigned int S57ID = (long unsigned int) json_array_get_number(paramsArr, 0);
S52ObjectHandle objH = S52_getMarObj(S57ID);
//_encode(result, "[%lu]", (long unsigned int *) objH);
_encode(result, "[%u]", objH);
goto exit;
}
//const char * STD S52_getAttList(unsigned int S57ID);
if (0 == g_strcmp0(cmdName, "S52_getAttList")) {
if (1 != count) {
_setErr(err, "params 'S57ID' not found");
goto exit;
}
long unsigned int S57ID = (long unsigned int) json_array_get_number(paramsArr, 0);
const char *str = S52_getAttList(S57ID);
if (NULL == str)
_encode(result, "[0]");
else
_encode(result, "[\"%s\"]", str);
goto exit;
}
//DLL int STD S52_xy2LL (double *pixels_x, double *pixels_y);
if (0 == g_strcmp0(cmdName, "S52_xy2LL")) {
if (2 != count) {
_setErr(err, "params 'pixels_x'/'pixels_y' not found");
goto exit;
}
double pixels_x = json_array_get_number(paramsArr, 0);
double pixels_y = json_array_get_number(paramsArr, 1);
int ret = S52_xy2LL(&pixels_x, &pixels_y);
if (TRUE == ret)
_encode(result, "[%f,%f]", pixels_x, pixels_y);
else {
_encode(result, "[0]");
}
goto exit;
}
//DLL int STD S52_setView(double cLat, double cLon, double rNM, double north);
if (0 == g_strcmp0(cmdName, "S52_setView")) {
if (4 != count) {
_setErr(err, "params 'cLat'/'cLon'/'rNM'/'north' not found");
goto exit;
}
double cLat = json_array_get_number(paramsArr, 0);
double cLon = json_array_get_number(paramsArr, 1);
double rNM = json_array_get_number(paramsArr, 2);
double north = json_array_get_number(paramsArr, 3);
int ret = S52_setView(cLat, cLon, rNM, north);
if (TRUE == ret)
_encode(result, "[1]");
else
_encode(result, "[0]");
//PRINTF("SOCK:S52_setView(): %s\n", result);
goto exit;
}
//DLL int STD S52_getView(double *cLat, double *cLon, double *rNM, double *north);
if (0 == g_strcmp0(cmdName, "S52_getView")) {
double cLat = 0.0;
double cLon = 0.0;
double rNM = 0.0;
double north = 0.0;
int ret = S52_getView(&cLat, &cLon, &rNM, &north);
if (TRUE == ret)
_encode(result, "[%f,%f,%f,%f]", cLat, cLon, rNM, north);
else
_encode(result, "[0]");
//PRINTF("SOCK:S52_getView(): %s\n", result);
goto exit;
}
//DLL int STD S52_setViewPort(int pixels_x, int pixels_y, int pixels_width, int pixels_height)
if (0 == g_strcmp0(cmdName, "S52_setViewPort")) {
if (4 != count) {
_setErr(err, "params 'pixels_x'/'pixels_y'/'pixels_width'/'pixels_height' not found");
goto exit;
}
double pixels_x = json_array_get_number(paramsArr, 0);
double pixels_y = json_array_get_number(paramsArr, 1);
double pixels_width = json_array_get_number(paramsArr, 2);
double pixels_height = json_array_get_number(paramsArr, 3);
int ret = S52_setViewPort((int)pixels_x, (int)pixels_y, (int)pixels_width, (int)pixels_height);
if (TRUE == ret)
_encode(result, "[1]");
else {
_encode(result, "[0]");
}
//PRINTF("SOCK:S52_setViewPort(): %s\n", result);
goto exit;
}
//DLL const char * STD S52_version(void);
if (0 == g_strcmp0(cmdName, "S52_version")) {
//const char *version = S52_version();
const char *version = S52_utils_version(); // no newline '\n'
_encode(result, "[\"%s\"]", version);
//PRINTF("%s", result);
goto exit;
}
//
_encode(result, "[0,\"WARNING:%s(): call not found\"]", cmdName);
exit:
//debug
//PRINTF("OUT STR:%s", result);
json_value_free(val);
return (int)id;
}
static gboolean _sendResp(GIOChannel *source, gchar *str_send, guint len)
// send response
{
gsize bytes_written = 0;
GError *error = NULL;
GIOStatus stat = g_io_channel_write_chars(source, str_send, len, &bytes_written, &error);
if (NULL != error) {
PRINTF("WARNING: g_io_channel_write_chars(): failed [stat:%i errmsg:%s]\n", stat, error->message);
g_error_free(error);
return FALSE;
}
if (G_IO_STATUS_ERROR == stat) {
// 0 - G_IO_STATUS_ERROR An error occurred.
// 1 - G_IO_STATUS_NORMAL Success.
// 2 - G_IO_STATUS_EOF End of file.
// 3 - G_IO_STATUS_AGAIN Resource temporarily unavailable.
PRINTF("WARNING: g_io_channel_write_chars() failed - GIOStatus:%i\n", stat);
return FALSE; // will close connection
}
g_io_channel_flush(source, NULL);
return TRUE;
}
static guint _encodeWebSocket(gchar *str_send, gchar *response, gsize respLen)
{
// encode response
guint n = 0;
if (respLen <= 125) {
// lenght coded with 7 bits <= 125
n = g_snprintf(str_send, SOCK_BUF, "\x81%c%s", (char)(respLen & 0x7F), response);
} else {
if (respLen < 65536) {
// lenght coded with 16 bits (code 126)
// bytesFormatted[1] = 126
// bytesFormatted[2] = ( bytesRaw.length >> 8 )
// bytesFormatted[3] = ( bytesRaw.length )
n = g_snprintf(str_send, SOCK_BUF, "\x81%c%c%c%s", 126, (char)(respLen>>8), (char)respLen, response);
} else {
// if need more then 65536 bytes to transfer (code 127)
/* dataLen max = 2^64
bytesFormatted[1] = 127
bytesFormatted[2] = ( bytesRaw.length >> 56 )
bytesFormatted[3] = ( bytesRaw.length >> 48 )
bytesFormatted[4] = ( bytesRaw.length >> 40 )
bytesFormatted[5] = ( bytesRaw.length >> 32 )
bytesFormatted[6] = ( bytesRaw.length >> 24 )
bytesFormatted[7] = ( bytesRaw.length >> 16 )
bytesFormatted[8] = ( bytesRaw.length >> 8 )
bytesFormatted[9] = ( bytesRaw.length )
*/
// FIXME: n == 0 !
PRINTF("ERROR: WebSocket Frame: FIXME: dataLen > 65535 not handled (%i)\n", respLen);
g_assert(0);
}
}
return n;
}
static gboolean _handleSocket(GIOChannel *source, gchar *str_read)
//
{
gchar response[SOCK_BUF] = {'\0'};
gchar result [SOCK_BUF] = {'\0'};
gchar err [SOCK_BUF] = {'\0'};
int id = _handleS52method(str_read, result, err);
// FIXME: _encode() call g_vsnprintf() & g_snprintf() do basically the same thing and the resulting
// string is the same .. but only g_snprintf() string pass io channel !!!
//_encode(response, "{\"id\":%i,\"error\":\"%s\",\"result\":%s}", id, (err[0] == '\0') ? "no error" : err, result);
guint n = g_snprintf(response, SOCK_BUF, "{\"id\":%i,\"error\":\"%s\",\"result\":%s}",
id, (err[0] == '\0') ? "no error" : err, result);
if (n < (SOCK_BUF-1)) {
response[n] = '\0';
response[n+1] = '\0';
} else {
response[SOCK_BUF-1] = '\0';
PRINTF("WARNING: g_vsnprintf(): fail - no space in buffer\n");
g_snprintf(response, SOCK_BUF, "{\"id\":%i,\"error\":\"%s\",\"result\":%s}", id, "_S52.i:_handleSocket() error", "[]");
}
return _sendResp(source, response, n);
}
static gboolean _handleWebSocket(GIOChannel *source, gchar *str_read, gsize length)
// handle multi-msg stream
{
// seem that only Dart send multi-msg stream!
while (('\x81' == str_read[0]) && (length > 0)) {
gchar response[SOCK_BUF] = {'\0'}; // JSON resp
gchar str_send[SOCK_BUF] = {'\0'}; // WedSocket buffer to send
gchar result [SOCK_BUF] = {'\0'}; // S52 call result
gchar err [SOCK_BUF] = {'\0'}; // S52 call error
//gchar jsonstr [SOCK_BUF] = {'\0'}; // JSON msg tmp holder
guint len = str_read[1] & 0x7F;
char *key = str_read + 2;
char *data = key + 4; // or str_read + 6;
for (guint i = 0; i<len; ++i) {
data[i] ^= key[i%4];
//jsonstr[i] = data[i];
}
// debug
//PRINTF("WebSocket Frame: msg in (length:%li len:%u):%s\n", length, len, data);
// FIXME: copy only JSON part data to a buffer, then
// call _handleS52method with it so that the JSON parser can't get confuse by the trailling undecode data.
// Note that the Parson JSON parser have no problem with the tailling undecoded data
int id = _handleS52method(data, result, err);
guint respLen = g_snprintf(response, SOCK_BUF, "{\"id\":%i,\"error\":\"%s\",\"result\":%s}",
id, (err[0] == '\0') ? "no error" : err, result);
// debug
//PRINTF("WebSocket Frame: resp out:%s\n", response);
guint n = _encodeWebSocket(str_send, response, respLen);
int ret = _sendResp(source, str_send, n);
if (FALSE == ret)
return FALSE;
str_read += len + 6;
length -= len + 6;
}
return TRUE;
}
static gboolean _handshakeWebSocket(GIOChannel *source, gchar *str_read)
{
gchar buf[SOCK_BUF] = {'\0'};
sscanf(str_read, "Sec-WebSocket-Key: %2047s", buf); // SOCK_BUF - 1
GString *secWebSocketKey = g_string_new(buf);
secWebSocketKey = g_string_append(secWebSocketKey, "258EAFA5-E914-47DA-95CA-C5AB0DC85B11");
// debug
//PRINTF("OUT secWebSocketKey>>>%s<<<\n", secWebSocketKey->str);
GChecksum *checksum = g_checksum_new(G_CHECKSUM_SHA1);
g_checksum_update(checksum, (const guchar *)secWebSocketKey->str, secWebSocketKey->len);
g_string_free(secWebSocketKey, TRUE);
guint8 buffer[1024];
gsize digest_len = 1023;
g_checksum_get_digest(checksum, buffer, &digest_len);
g_checksum_free(checksum);
gchar *acceptstr = g_base64_encode(buffer, digest_len);
GString *respstr = g_string_new("HTTP/1.1 101 Web Socket Protocol Handshake\r\n"
"Server: Bla Gateway\r\n"
"Upgrade: WebSocket\r\n"
"Connection: Upgrade\r\n"
"Access-Control-Allow-Origin:http://127.0.0.1:3030\r\n"
"Access-Control-Allow-Credentials: true\r\n"
"Access-Control-Allow-Headers: content-type\r\n"
);
g_string_append_printf(respstr,
"Sec-WebSocket-Accept:%s\r\n"
"\r\n",
acceptstr);
g_free(acceptstr);
int ret = _sendResp(source, respstr->str, respstr->len);
g_string_free(respstr, TRUE);
//return TRUE;
return ret;
}
static gboolean _socket_read_write(GIOChannel *source, GIOCondition cond, gpointer user_data)
{
// quiet - not used
(void)user_data;
switch(cond) {
case G_IO_IN: {
// Note: buffer must be local because we can have more than one connection (thread)
gchar str_read[SOCK_BUF] = {'\0'};
gsize length = 0;
GError *error = NULL;
GIOStatus stat = g_io_channel_read_chars(source, str_read, SOCK_BUF, &length, &error);
// can't read line on raw socket
//gsize terminator_pos = 0;
//GIOStatus stat = g_io_channel_read_line(source, &str_return, &length, &terminator_pos, &error);
//GIOStatus stat = g_io_channel_read_line_string(source, buffer, &terminator_pos, &error);
if (NULL != error) {
PRINTF("WARNING: g_io_channel_read_chars(): failed [stat:%i err:%s]\n", stat, error->message);
g_error_free(error);
return FALSE;
}
if (G_IO_STATUS_ERROR == stat) {
// 0 - G_IO_STATUS_ERROR An error occurred.
// 1 - G_IO_STATUS_NORMAL Success.
// 2 - G_IO_STATUS_EOF End of file.
// 3 - G_IO_STATUS_AGAIN Resource temporarily unavailable.
PRINTF("WARNING: g_io_channel_read_chars(): failed - GIOStatus:%i\n", stat);
return FALSE;
}
if (0 == length ) {
PRINTF("DEBUG: length=%i\n", length);
return FALSE;
}
// Not a WebSocket connection - normal JSON handling
if ('{' == str_read[0]) {
return _handleSocket(source, str_read);
}
// in a WebSocket Frame - msg
if ('\x81' == str_read[0]) {
return _handleWebSocket(source, str_read, length);
}
gchar *WSKeystr = g_strrstr(str_read, "Sec-WebSocket-Key");
if (NULL != WSKeystr) {
return _handshakeWebSocket(source, WSKeystr);
} else {
PRINTF("WARNING: unknown socket msg (%s)\n", str_read);
return FALSE;
}
}
case G_IO_OUT: PRINTF("G_IO_OUT \n"); return FALSE; break;
case G_IO_PRI: PRINTF("G_IO_PRI \n"); break;
case G_IO_ERR: PRINTF("G_IO_ERR \n"); break;
case G_IO_HUP: PRINTF("G_IO_HUP \n"); break;
case G_IO_NVAL:PRINTF("G_IO_NVAL\n"); break;
}
return TRUE;
//return FALSE; // will close connection
}
static gboolean _new_connection(GSocketService *service,
GSocketConnection *connection,
GObject *source_object,
gpointer user_data)
{
// quiet gcc warning (unused param)
(void)service;
(void)source_object;
(void)user_data;
g_object_ref(connection); // tell glib not to disconnect
GSocketAddress *sockaddr = g_socket_connection_get_remote_address(connection, NULL);
GInetAddress *addr = g_inet_socket_address_get_address(G_INET_SOCKET_ADDRESS(sockaddr));
guint16 port = g_inet_socket_address_get_port (G_INET_SOCKET_ADDRESS(sockaddr));
PRINTF("NOTE: New Connection from %s:%d\n", g_inet_address_to_string(addr), port);
GSocket *socket = g_socket_connection_get_socket(connection);
gint fd = g_socket_get_fd(socket);
GIOChannel *channel = g_io_channel_unix_new(fd);
//*
GError *error = NULL;
GIOStatus stat = g_io_channel_set_encoding(channel, NULL, &error);
if (NULL != error) {
g_object_unref(connection);
PRINTF("ERROR: g_io_channel_set_encoding(): failed [stat:%i err:%s]\n", stat, error->message);
g_error_free(error);