I have code running on a microcontroller, and I am parsing the control command it will receive.
The command is JSON, and looks approximately like this...
{[PARAMTER_1]:[VALUE_1], [...] , [PARAMTER_N]:[VALUE_N]}
So it could be...
{"opMode"=1, "StringA" = "Hello"}
or it could be
{"brightness"=5, "StringB"="Goodbye"}
How can I test to see if a parameter is included?
For example, if I process with this code:
String command = <JSON COMMAND>
char conString[200];
command.toCharArray(conString, sizeof(conString));
StaticJsonBuffer<1000> jsonBuffer;
JsonObject& root = jsonBuffer.parseObject(conString);
How can I test the resultant root["PARAMTER"] outputs to see if they existed? The problem is that if I just do something like...
resultString = root["StringA"];
resultInt = root["opMode"];
If those exist but are "" and 0, they will return the same values as if they were not included in the JSON in the first place.
Do I have to use something like command.indexOf("opMode") on the raw JSON string to make sure it's there? (In this example, that would work. But with more complicated JSON, that seems to be a lot of work to make sure a response is valid/existing)
Related
I am trying to write a GUI that will display the name of the sketch it was generated from using a simple text() command. However, I am running into trouble getting any of the general JS solutions to work for me. Many solutions I have found use the filename reserved word but that does not seem to be reserved in Processing 3.5.4. I have also tried parsing the strings using a similar method to what can be found here. I am very new to processing and this is only my 2nd attempt at using Processing.
Any advice would be greatly appreciated
You can get the path (as a string) to the sketch with sketchPath().
From there you could either parse the string (pull off everything after the last slash) to get the sketch name, or you can use sketchFile() to get a reference to the file itself and get the name from there:
String path = sketchPath();
File file = sketchFile(path);
String sketchName = file.getName();
println(sketchName);
You could combine this all into one line like so:
String sketchName = sketchFile(sketchPath()).getName();
I have a MSSQL table with a field of type image that has some text stored in it.
The field has data that looks like this:
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
In PHP I can write a SQL query to convert that data like this: SELECT CAST(CAST(CUST_ORDER_BINARY.BITS as VARBINARY(8000)) as VARCHAR(8000)) as result FROM CUST_ORDER_BINARY WHERE CUST_ORDER_ID = 'CO-299403S';
When I try the same thing in Ruby I get a result like this:
specs = VisualCustomer.connection.exec_query(sql).first
{"result"=>"T\u0000H\u0000I\u0000S\u0000 \u0000I\u0000S\u0000 \u0000A\u0000 \u0000L\u0000I\u0000G\u0000H\u0000T\u0000A\u0000R\u0000T\u0000 \u0000O\u0000R\u0000D\u0000E\u0000R\u0000.\u0000 \u0000 \u0000L\u0000I\u0000G\u0000H\u0000T\u0000A\u0000R\u0000T\u0000 \u0000I\u0000S\u0000 \u0000D\u0000O\u0000I\u0000N\u0000G\u0000 \u0000T\u0000H\u0000E\u0000 \u0000F\u0000A\u0000B\u0000.\u0000\r\u0000\n\u0000L\u0000I\u0000G\u0000H\u0000T\u0000A\u0000R\u0000T\u0000 \u0000S\u0000H\u0000I\u0000P\u0000P\u0000I\u0000N\u0000G\u0000 \u0000T\u0000O\u0000 \u0000C\u0000U\u0000S\u0000T\u0000O\u0000M\u0000E\u0000R\u0000 \u0000<\u00008\u0000-\u00002\u00003\u0000-\u00001\u00007\u0000>\u0000\r\u0000\n\u0000\r\u0000\n\u0000C\u0000o\u0000n\u0000n\u0000i\u0000e\u0000,\u0000 \u0000p\u0000l\u0000e\u0000a\u0000s\u0000e\u0000 \u0000p\u0000r\u0000i\u0000n\u0000t\u0000 \u0000s\u0000t\u0000i\u0000c\u0000k\u0000e\u0000r\u0000s\u0000 \u0000f\u0000o\u0000r\u0000 \u0000e\u0000a\u0000c\u0000h\u0000 \u0000o\u0000u\u0000t\u0000e\u0000r\u0000 \u0000b\u0000o\u0000x\u0000 \u0000t\u0000h\u0000a\u0000t\u0000 \u0000i\u0000n\u0000c\u0000l\u0000u\u0000d\u0000e\u0000s\u0000 \u0000t\u0000h\u0000e\u0000 \u0000i\u0000n\u0000f\u0000o\u0000:\u0000\r\u0000\n\u0000(\u00001\u0000)\u0000 \u0000o\u0000f\u0000 \u0000(\u00001\u0000)\u0000\r\u0000\n\u0000L\u0000A\u00002\u0000 \u0000T\u0000h\u0000r\u0000e\u0000e\u0000 \u0000L\u0000a\u0000r\u0000g\u0000e\u0000 \u0000\r\u0000\n\u00008\u00006\u0000\\\u0000\"\u0000L\u0000 \u0000x\u0000 \u00006\u0000\\\u0000\"\u0000W\u0000 \u0000x\u0000 \u00008\u0000\\\u0000\"\u0000H\u0000\r\u0000\n\u0000N\u0000a\u0000t\u0000u\u0000r\u0000a\u0000l\u0000\r\u0000\n\u0000P\u00002\u00000\u00009\u00008\u00001\u00000\u00005\u0000 \u0000M\u0000O\u0000D\u0000 \u0000P\u0000i\u0000z\u0000z\u0000a\u0000 \u0000S\u0000u\u0000g\u0000a\u0000r\u0000h\u0000o\u0000u\u0000s\u0000e\u0000,\u0000 \u0000U\u0000T\u0000"}
So the data is "almost" there. :)
I've tried gsubing to remove the \u0000 from the result but that's not working, obviously.
** EDIT 1 **
So, for some reason, getting the data from MSSQL into ruby is causing some kind of partial translation. I never get the raw data from the field, instead I get the "semi-translated" data. Even if I just query it, it still comes out like
"T\x00H\x00I\x00S\x00 \x00I\x00S\x00 \x00A\x00...
I tried to put it back doing:
s = order_specs.each_byte.map { |b| b.to_s(16) }.join
Then, when I do:
order_specs = s.scan(/.{2}(?=0{2})/).map{|s| s.to_i(16)}.pack("c*").tr("\x02", " ")
I just get an empty string. :/
That happens when you're inspecting the data, but when you write it will be fine:
Example:
$ ruby -e 'bin = File.read("/bin/ls");p bin; File.open("/tmp/file","w+"){|f| f.write bin}'
"\u007FELF\u0002\u0001\u0001\u0000\u0000\u0000 ...
....
$ md5sum /bin/ls
84b7b042405dfc79f2afe9b12d6b931d /bin/ls
$ md5sum /tmp/file
84b7b042405dfc79f2afe9b12d6b931d /tmp/file
So here we read a binary file /bin/ls and wrote it to another file /tmp/file as you can the the checksums are the identical.
s = "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"
Code:
puts s.scan(/.{2}(?=0{2})/).map{|s| s.to_i(16)}.pack("c*")
Output:
THISISALIGHTARTORDER.LIGHTARTISDOINGTHEFAB.
LIGHTARTSHIINGTOCUSTOMER<8-23-17>
Connie,leaserintstickersforeachouterboxthatincludestheinfo:
(1)of(1)
LA2ThreeLarge
86\"Lx6\"Wx8\"H
Natural
29815MODizzaSugarhouse,UT
Note: Some characters are unprintable, so they do not appear in this page. See the edit page of this answer for detail.
Or, if you replace "\x02" with a space,
puts s.scan(/.{2}(?=0{2})/).map{|s| s.to_i(16)}.pack("c*").tr("\x02", " ")
you get:
THIS IS A LIGHTART ORDER. LIGHTART IS DOING THE FAB.
LIGHTART SHIING TO CUSTOMER <8-23-17>
Connie, lease rint stickers for each outer box that includes the info:
(1) of (1)
LA2 Three Large
86\"L x 6\"W x 8\"H
Natural
29815 MOD izza Sugarhouse, UT
I finally figured this out. I needed to do string.gsub("\u0000", '')
So, I was getting the data from the MSSQL database correctly it seemed, but I that null byte was really throwing things off and was being sent to the front end where it was appearing on the page. i swear i tried gsubing before but for whatever reason it wasn't working. I tried it again now before when the response is being formed and it is now being sent correctly.
Problem:
Hello, I have been struggling recently in my programming endeavours. I have managed to receive the output below from Google Speech to Text, but I cannot figure out how draw data from this block.
Excerpt 1:
[VoiceMain]: Successfully initialized
{"result":[]}
{"result":[{"alternative":[{"transcript":"hello","confidence":0.46152416},{"transcript":"how low"},{"transcript":"how lo"},{"transcript":"how long"},{"transcript":"Polo"}],"final":true}],"result_index":0}
[VoiceMain]: Successfully initialized
{"result":[]}
{"result":[{"alternative":[{"transcript":"hello"},{"transcript":"how long"},{"transcript":"how low"},{"transcript":"howlong"}],"final":true}],"result_index":0}
Objective:
My goal is to extract the string "hello" (without the quotation marks) from the first transcript of each block and set it equal to a variable. The problem arises when I do not know what the phrase will be. Instead of "hello", the phrase may be a string of any length. Even if it is a different string, I would still like to set it to the same variable to which the phrase "hello" would have been set to.
Furthermore, I would like to extract the number after the word "confidence". In this case, it is 0.46152416. Data type does not matter for the confidence variable. The confidence variable appears to be more difficult to extract from the blocks because it may or may not be present. If it is not present, it must be ignored. If it is present however, it must be detected and stored as a variable.
Also please note that this text block is stored within a file named "CurlOutput.txt".
All help or advice related to solving this problem is greatly appreciated.
You could do this with regex, but then I am assuming you will want to use this as a dict later in your code. So here is a python approach to building this result as a dictionary.
import json
with open('CurlOutput.txt') as f:
lines = f.read().splitlines()
flag = '{"result":[]} '
for line in lines: # Loop through each lin in file
if flag in line: # check if this is a line with data on it
results = json.loads(line.replace(flag, ''))['result'] # Load data as a dict
# If you just want to change first index of alternative
# results[0]['alternative'][0]['transcript'] = 'myNewString'
# If you want to check all alternative for confidence and transcript
for result in results[0]['alternative']: # Loop over each alternative
transcript = result['transcript']
confidence = None
if 'confidence' in result:
confidence = result['confidence']
# now do whatever you want with confidence and transcript.
I'm coding in C and using Libpq library of Postgresql and I would like to store a PNG image into the database in "bytea" type. I have been searching on the net for hours and couldn't find a good example to handle this work, so wanted to write here and ask for your help.
I have 12 params to bind and one of them is PNG image. The rest are char*, and no problem with them.
Below is what I have tried so far. (I'm writing the necessary part of code):
PGresult *res;
PGconn *conn;
const char *paramValues[12];
int paramLengths[12];
int paramFormats[12];
const char* imageFrame=frameImageArray.data();// frameImageArray.data is const char*.
int imageSize=frameImageArray.size();
paramFormats[11]=1;
paramLengths[11]=imageSize;
paramValues[11]= imageFrame;
// insertplate is a function on db
res = PQexecParams(conn,
"SELECT insertplate($1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12)",
12, // param number
NULL, // oid param type
paramValues, // param values
paramLengths, // param lengths
paramFormats, // params format, 1 for binary
1); //1 for binary result
It is compiled with no problem but when it comes to store the image to db on runtime, the classical runtime error occures :
"Unhandled exception at 0x6d3dc220 in ..._debug.exe: 0xC0000005: Access violation reading location 0x000000007f91e508."
Seems something about memory handling.
Whatever I tried, I couldn't make it run and I'm not able to see my error. Do I have to use Oids for sending binary data to db with PQexecParams? Or something else I'm missing ? I really appreciate if someone help me with this.
Thanks in advance.
Edit: I just realised that if I use Insert statement, it works well, but this function doesn't. Normally it works. Weird.
I finally find the error.
//paramFormats[0]=0;
//paramFormats[1]=0;
//paramFormats[2]=0;
//paramFormats[3]=0;
//paramFormats[4]=0;
//paramFormats[5]=0;
//paramFormats[6]=0;
//paramFormats[7]=0;
//paramFormats[8]=0;
//paramFormats[9]=0;
//paramFormats[10]=0;
//paramFormats[11]=1;
It is possible to leave the "parameter format" as NULL, but I wanted to set only "paramFormats[11]" as seen above. I have set the others to 0 as well and it worked. I didn't expect something like this.
I'm debugging someone else's application and I've run across a data structure that, when dumped to a file, looks like this:
["value"] = {}
["value"]["0.ouname"] = {}
["value"]["0.ouname"]["label"] = "Test value"
["value"]["0.ouname"]["seq"] = 90
["value"]["0.ouname"]["type"] = "text"
["value"]["0.ouname"]["value"] = ""
["value"]["1.ouname"] = {}
["value"]["localityName"]["value"] = "California"
I need to be able to extract the seq number "90" from it but I'm at a loss as to how.
I am able to get at the "California" value by doing the following:
print(myvar.value.localityName.value)
However, I can't seem to get the sequence number
So far, I've tried the following:
print(myvar.value.0.ouname.seq)
print(myvar.value.["0.ouname"].seq)
print(myvar.value."0.ouname".seq)
But I haven't been successful!
If you have any suggestions, I'd appreciate it.
In Lua, a.b is syntactic sugar for a["b"]. Of course, you can use it only when it's possible, and the resulting expression won't mean something else (as in your example).
Thus, you have to use
print(myvar.value["0.ouname"].seq)
You could also drop all dots and use only [], as such:
print(myvar["value"]["0.ouname"]["seq"])
Which is exactly the same format that has been written to file.
print(myvar.value['0.ouname'].seq)