Include Curly brackets into String CURL

Projects Programming
1

I'm trying to build a curl command with the following structure:

Console.println("Call Linux Command to Send Data");

Process proc;

proc.runShellCommand("curl -k -g preapiv2.wattabit.com/wdevices/v1/publish/generic?token=XXXXXXX&type=MATRIX&dataloggerId=XXXXXXX&timezone=Romance%20standard%20Time&data=[{'dev':'2'}]");

while (proc.available()>0) {
char c = proc.read();
Console.write((char)c);

}

It seems that the curly brackets [{}] are not processed correctly in the string.

Any idea?

2

IS this an Arduino programming question ?

If so then please post a complete program rather than snippets.

3

The only problem I have is on the method were I upload the data:

void uploadData() {//Upload Data

Console.println("Call Linux Command to Send Data Wattabit");
Process proc; // Create a proce ss and call it "proc", this process will execute a Linux curl command

proc.runShellCommand("curl -k -g preapiv2.wattabit.com/wdevices/v1/publish/generic?token=XXXXXX&type=MATRIX&dataloggerId=XXXXXX&timezone=Romance%20standard%20Time&data=[{'dev':'2'}]");

delayMicroseconds(40);

Console.print("Feedback from Linux: ");
// If there's output from Linux,
// send it out the Console:
while (proc.available()>0)
{
char c = proc.read();
Console.write((char)c);

}

Console.println("");
Console.println("Call Finished");
Console.println("####################################");
Console.println("");
}

4

It should work fine in c or c++. Whether the ide handles it correctly during display or preprocessing is a separate question. Can you be more specific about “not processed correctly”?

5

My problem falls on the use of curly brackets on the URL. This URL is intended to post information to a given data base and in case of success it returns TRUE.
The point is that every time I use these brackets to form a jason array the curl command is not generated correctly due to no response of the server is done.

I have also tried to send the hexa value of the brackets (%5B%7B%7D%5D ) but either not work.

If someone could provide and example curl command with curly brackets inside the URL and the proper atributtes used ( -g for example) it would be usefull for me.

Thanks

6

proc.runShellCommand("curl -k -g preapiv2.wattabit.com/wdevices/v1/publish/generic?token=XXXXXX&type=MATRIX&dataloggerId=XXXXXX&timezone=Romance%20standard%20Time&data=[{'dev':'2'}]");

I think your curly brackets (and perhaps other characters) are disappearing as a result of whatever shell is being used by "runShellCommand", rather than anything on the Arduino side.
properly quoting magic shell characters that need to make it to a program's actual argument is an art unto itself :frowning:
try an extra set of quotes:

proc.runShellCommand("curl -k -g \"preapiv2.wattabit.com/wdevices/v1/publish/generic?token=XXXXXX&type=MATRIX&dataloggerId=XXXXXX&timezone=Romance%20standard%20Time&data=[{'dev':'2'}]\"");