void Webserver::GetJsonResponse(const char* request)
{
jsonPointer = 0;
writing = true;
if(StringStartsWith(request, "poll"))
{
strncpy(jsonResponse, "{\"poll\":[", STRING_LENGTH);
if(reprap.GetGCodes()->PrintingAFile())
strncat(jsonResponse, "\"P\",", STRING_LENGTH); // Printing
else
strncat(jsonResponse, "\"I\",", STRING_LENGTH); // Idle
float liveCoordinates[DRIVES+1];
reprap.GetMove()->LiveCoordinates(liveCoordinates);
for(int8_t drive = 0; drive < AXES; drive++)
{
strncat(jsonResponse, "\"", STRING_LENGTH);
strncat(jsonResponse, ftoa(0, liveCoordinates[drive], 2), STRING_LENGTH);
strncat(jsonResponse, "\",", STRING_LENGTH);
}
// FIXME: should loop through all Es
strncat(jsonResponse, "\"", STRING_LENGTH);
strncat(jsonResponse, ftoa(0, liveCoordinates[AXES], 4), STRING_LENGTH);
strncat(jsonResponse, "\",", STRING_LENGTH);
for(int8_t heater = 0; heater < HEATERS; heater++)
{
strncat(jsonResponse, "\"", STRING_LENGTH);
strncat(jsonResponse, ftoa(0, reprap.GetHeat()->GetTemperature(heater), 1), STRING_LENGTH);
if(heater < HEATERS - 1)
strncat(jsonResponse, "\",", STRING_LENGTH);
else
strncat(jsonResponse, "\"", STRING_LENGTH);
}
strncat(jsonResponse, "]", STRING_LENGTH);
// Send the Z probe value
char scratch[SHORT_STRING_LENGTH+1];
scratch[SHORT_STRING_LENGTH] = 0;
if (platform->GetZProbeType() == 2)
{
snprintf(scratch, SHORT_STRING_LENGTH, ",\"probe\":\"%d (%d)\"", (int)platform->ZProbe(), platform->ZProbeOnVal());
}
else
{
snprintf(scratch, SHORT_STRING_LENGTH, ",\"probe\":\"%d\"", (int)platform->ZProbe());
}
strncat(jsonResponse, scratch, STRING_LENGTH);
// Send the amount of buffer space available for gcodes
snprintf(scratch, SHORT_STRING_LENGTH, ",\"buff\":%u", GetReportedGcodeBufferSpace());
strncat(jsonResponse, scratch, STRING_LENGTH);
// Send the home state. To keep the messages short, we send 1 for homed and 0 for not homed, instead of true and false.
strncat(jsonResponse, ",\"hx\":", STRING_LENGTH);
strncat(jsonResponse, (reprap.GetGCodes()->GetAxisIsHomed(0)) ? "1" : "0", STRING_LENGTH);
strncat(jsonResponse, ",\"hy\":", STRING_LENGTH);
strncat(jsonResponse, (reprap.GetGCodes()->GetAxisIsHomed(1)) ? "1" : "0", STRING_LENGTH);
strncat(jsonResponse, ",\"hz\":", STRING_LENGTH);
strncat(jsonResponse, (reprap.GetGCodes()->GetAxisIsHomed(2)) ? "1" : "0", STRING_LENGTH);
// Send the response sequence number
strncat(jsonResponse, ",\"seq\":", STRING_LENGTH);
snprintf(scratch, SHORT_STRING_LENGTH, "%u", (unsigned int)seq);
strncat(jsonResponse, scratch, STRING_LENGTH);
// Send the response to the last command. Do this last because it is long and may need to be truncated.
strncat(jsonResponse, ",\"resp\":\"", STRING_LENGTH);
size_t jp = strnlen(jsonResponse, STRING_LENGTH);
const char *p = gcodeReply;
while (*p != 0 && jp < STRING_LENGTH - 2) // leave room for the final '"}'
{
char c = *p++;
char esc;
switch(c)
{
case '\r':
esc = 'r'; break;
case '\n':
esc = 'n'; break;
case '\t':
esc = 't'; break;
case '"':
esc = '"'; break;
case '\\':
esc = '\\'; break;
default:
esc = 0; break;
}
if (esc)
{
if (jp == STRING_LENGTH - 3)
break;
jsonResponse[jp++] = '\\';
jsonResponse[jp++] = esc;
}
else
{
jsonResponse[jp++] = c;
}
}
strncat(jsonResponse, "\"}", STRING_LENGTH);
jsonResponse[STRING_LENGTH] = 0;
JsonReport(true, request);
return;
}
if(StringStartsWith(request, "gcode"))
{
LoadGcodeBuffer(&clientQualifier[6], true);
char scratch[SHORT_STRING_LENGTH+1];
scratch[SHORT_STRING_LENGTH] = 0;
snprintf(scratch, SHORT_STRING_LENGTH, "{\"buff\":%u}", GetReportedGcodeBufferSpace());
strncat(jsonResponse, scratch, STRING_LENGTH);
JsonReport(true, request);
return;
}
if(StringStartsWith(request, "files"))
{
char* fileList = platform->GetMassStorage()->FileList(platform->GetGCodeDir(), false);
strncpy(jsonResponse, "{\"files\":[", STRING_LENGTH);
strncat(jsonResponse, fileList, STRING_LENGTH);
strncat(jsonResponse, "]}", STRING_LENGTH);
JsonReport(true, request);
return;
}
if(StringStartsWith(request, "name"))
{
strncpy(jsonResponse, "{\"myName\":\"", STRING_LENGTH);
strncat(jsonResponse, myName, STRING_LENGTH);
strncat(jsonResponse, "\"}", STRING_LENGTH);
JsonReport(true, request);
return;
}
if(StringStartsWith(request, "password"))
{
CheckPassword();
strncpy(jsonResponse, "{\"password\":\"", STRING_LENGTH);
if(gotPassword)
strncat(jsonResponse, "right", STRING_LENGTH);
else
strncat(jsonResponse, "wrong", STRING_LENGTH);
strncat(jsonResponse, "\"}", STRING_LENGTH);
JsonReport(true, request);
return;
}
if(StringStartsWith(request, "axes"))
{
strncpy(jsonResponse, "{\"axes\":[", STRING_LENGTH);
for(int8_t drive = 0; drive < AXES; drive++)
{
strncat(jsonResponse, "\"", STRING_LENGTH);
strncat(jsonResponse, ftoa(0, platform->AxisLength(drive), 1), STRING_LENGTH);
if(drive < AXES-1)
strncat(jsonResponse, "\",", STRING_LENGTH);
else
strncat(jsonResponse, "\"", STRING_LENGTH);
}
strncat(jsonResponse, "]}", STRING_LENGTH);
JsonReport(true, request);
return;
}
JsonReport(false, request);
}
// Get the Json response for this command.
// 'value' is null-terminated, but we also pass its length in case it contains embedded nulls, which matter when uploading files.
bool Webserver::GetJsonResponse(const char* request, const char* key, const char* value, size_t valueLength)
{
bool found = true; // assume success
bool keepOpen = false; // assume we don't want to persist the connection
if (StringEquals(request, "status")) // new style status request
{
GetStatusResponse(1);
}
else if (StringEquals(request, "poll")) // old style status request
{
GetStatusResponse(0);
}
else if (StringEquals(request, "gcode") && StringEquals(key, "gcode"))
{
LoadGcodeBuffer(value);
snprintf(jsonResponse, ARRAY_UPB(jsonResponse), "{\"buff\":%u}", GetReportedGcodeBufferSpace());
}
else if (StringEquals(request, "upload_begin") && StringEquals(key, "name"))
{
CancelUpload();
FileStore *f = platform->GetFileStore("0:/", value, true);
if (f != NULL)
{
fileBeingUploaded.Set(f);
uploadState = uploadOK;
}
else
{
uploadState = uploadError;
}
GetJsonUploadResponse();
}
else if (StringEquals(request, "upload_data") && StringEquals(key, "data"))
{
if (uploadState == uploadOK)
{
uploadPointer = value;
uploadLength = valueLength;
}
GetJsonUploadResponse();
keepOpen = true;
}
else if (StringEquals(request, "upload_end") && StringEquals(key, "size"))
{
// Write the remaining data
if (uploadLength != 0)
{
if (!fileBeingUploaded.Write(uploadPointer, uploadLength))
{
uploadState = uploadError;
}
}
uploadPointer = NULL;
uploadLength = 0;
if (uploadState == uploadOK && !fileBeingUploaded.Flush())
{
uploadState = uploadError;
}
// Check the file length is as expected
if (uploadState == uploadOK && fileBeingUploaded.Length() != strtoul(value, NULL, 10))
{
uploadState = uploadError;
}
// Close the file
if (!fileBeingUploaded.Close())
{
uploadState = uploadError;
}
GetJsonUploadResponse();
if (uploadState != uploadOK && strlen(filenameBeingUploaded) != 0)
{
platform->GetMassStorage()->Delete("0:/", filenameBeingUploaded);
}
filenameBeingUploaded[0] = 0;
}
else if (StringEquals(request, "upload_cancel"))
{
CancelUpload();
snprintf(jsonResponse, ARRAY_UPB(jsonResponse), "{\"err\":%d}", 0);
}
else if (StringEquals(request, "delete") && StringEquals(key, "name"))
{
bool ok = platform->GetMassStorage()->Delete("0:/", value);
snprintf(jsonResponse, ARRAY_UPB(jsonResponse), "{\"err\":%d}", (ok) ? 0 : 1);
}
else if (StringEquals(request, "files"))
{
const char* dir = (StringEquals(key, "dir")) ? value : platform->GetGCodeDir();
const char* fileList = platform->GetMassStorage()->FileList(dir, false);
snprintf(jsonResponse, ARRAY_UPB(jsonResponse), "{\"files\":[%s]}", fileList);
}
else if (StringEquals(request, "fileinfo") && StringEquals(key, "name"))
{
unsigned long length;
float height, filament, layerHeight;
char generatedBy[50];
bool found = GetFileInfo(value, length, height, filament, layerHeight, generatedBy, ARRAY_SIZE(generatedBy));
if (found)
{
snprintf(jsonResponse, ARRAY_UPB(jsonResponse),
"{\"err\":0,\"size\":%lu,\"height\":%.2f,\"filament\":%.1f,\"layerHeight\":%.2f,\"generatedBy\":\"%s\"}",
length, height, filament, layerHeight, generatedBy);
}
else
{
snprintf(jsonResponse, ARRAY_UPB(jsonResponse), "{\"err\":1}");
}
}
else if (StringEquals(request, "name"))
{
snprintf(jsonResponse, ARRAY_UPB(jsonResponse), "{\"myName\":\"");
size_t j = strlen(jsonResponse);
for (size_t i = 0; i < ARRAY_SIZE(myName) - 1; ++i)
{
char c = myName[i];
if (c < ' ') // if null terminator or bad character
break;
if (c == '"' || c == '\\')
{
// Need to escape the quote-mark or backslash for JSON
jsonResponse[j++] = '\\';
}
jsonResponse[j++] = c;
}
jsonResponse[j++] = '"';
jsonResponse[j++] = '}';
jsonResponse[j] = 0;
}
else if (StringEquals(request, "password") && StringEquals(key, "password"))
{
CheckPassword(value);
snprintf(jsonResponse, ARRAY_UPB(jsonResponse), "{\"password\":\"%s\"}", (gotPassword) ? "right" : "wrong");
}
else if (StringEquals(request, "axes"))
{
strncpy(jsonResponse, "{\"axes\":", ARRAY_UPB(jsonResponse));
char ch = '[';
for (int8_t drive = 0; drive < AXES; drive++)
{
sncatf(jsonResponse, ARRAY_UPB(jsonResponse), "%c%.1f", ch, platform->AxisTotalLength(drive));
ch = ',';
}
strncat(jsonResponse, "]}", ARRAY_UPB(jsonResponse));
}
else if (StringEquals(request, "connect"))
{
CancelUpload();
GetStatusResponse(1);
}
else
{
found = false;
}
JsonReport(found, request);
return keepOpen;
}