Powershell curl double quotes

Question

I am trying to invoke a curl command in powershell and pass some JSON information.

Here is my command:

curl -X POST -u username:password -H "Content-Type: application/json" -d "{ "fields": { "project": { "key": "key" }, "summary": "summary", "description": "description - here", "type": { "name": "Task" }}}"

I was getting globbing errors and "unmatched braces" and host could not be resolved, etc.

Then I tried prefixing the double quotes in the string with the backtick character, but it could not recognize the - character in the description json field

thanks

EDIT 1:

When I wrote the curl command in a regular batch file, I used double quotes and no single quotes. Also, in the -d string, I escaped all the double quotes with \ and the command worked.

In this case, my curl is actually pointing to curl.exe. I specified the path, just didn't list it here. Also I tried adding single quotes around -d and I got:

curl: option -: is unknown curl: try 'curl --help' or 'curl --manual' for more information

Seems like it cannot recognize the - character in the JSON

1) Try enclosing the -d argument in single quotes instead of double 2) Make sure curl.exe is actually being called. If I remember correctly curl in powershell can be an alias for Invoke-WebRequest — arco444
– arco444, Commented Nov 4, 2015 at 16:26
OK, might be the escaping then. In powershell the escape character is the backtick ` so maybe try using that on the quotes inside the json — arco444
– arco444, Commented Nov 4, 2015 at 16:43
@StevenPenny Seems to me that you want to clean all curl/powershell threads ^^. Does something like curl.exe -X POST "https://reqbin.com/echo/post/json" -H "Content-Type: application/json" -d (@{fields=@{project=@{key='key';summary='summary';description='description - here'; type=@{name='Task'}}}} | ConvertTo-Json -Depth 3 -Compress) would apply ? — Zilog80
– Zilog80, Commented Apr 1, 2021 at 14:25

Tomalak · Accepted Answer · 2015-11-04 16:49:48Z

12

Pipe the data into curl.exe, instead of trying to escape it.

$data = @{
    fields = @{
        project = @{
            key = "key"
        }
        summary = "summary"
        description = "description - here"
        type = @{
            name = "Task"
        }
    }
}

$data | ConvertTo-Json -Compress | curl.exe -X POST -u username:password -H "Content-Type: application/json" -d "@-"

curl.exe reads stdin if you use @- as your data parameter.

P.S.: I strongly suggest you use a proper data structure and ConvertTo-Json, as shown, instead of building the JSON string manually.

answered Nov 4, 2015 at 16:49

Tomalak

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7 Comments

Kingamere Over a year ago

Can I expand variables in the json structure?. Like if I set $var="info", referencing $var would expand it?

Tomalak Over a year ago

Sure, that is a regular Powershell object. You can use any Powershell expression in it, you can use loops to build it, etc.

Kingamere Over a year ago

Also, in the $data variable, what are the @ characters for?

Tomalak Over a year ago

@{} is Powershell syntax for a hash table (associative array, key/value store, dictionary, object, whatever you may call it). Read up on it, for example here ss64.com/ps/syntax-hash-tables.html, here technet.microsoft.com/en-us/library/ee692803.aspx or in the official documentation.

Kingamere Over a year ago

Ok thanks, and what determines if the key and value should be declared as strings (double quotes) or not? Like you have name = "task", what if it was "name" = "task" or "name" = task? Or does it not matter when you convert to a JSON string?

|

Alexander Fadeev · Accepted Answer · 2020-09-21 20:36:17Z

5

Easy way (for simple testing):

curl -X POST -H "Content-Type: application/json" -d '{ \"field\": \"value\"}'

answered Sep 21, 2020 at 20:36

Alexander Fadeev

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1 Comment

Ygautomo Over a year ago

I think you should use curl.exe in PowerShell curl.exe -X POST -H "Content-Type: application/json" -d '{ \"field\": \"value\"}' because curl in PowersShell is Invoke-WebRequest, which differs from cURL in Linux.

Marius · Accepted Answer · 2023-10-13 07:11:07Z

1

Easy way (for simple testing, with variables):

curl -X POST -H "Content-Type: application/json" -d "{ \`"field\`": \`"$value\`"}"

answered Oct 13, 2023 at 7:11

Marius

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