According to the documentation:
PostFormValue returns the first value for the named component of the POST, PATCH, or PUT request body.
URL query parameters are ignored.
PostFormValue calls ParseMultipartForm and ParseForm if necessary
and ignores any errors returned by these functions.
If key is not present, PostFormValue returns the empty string.
So the function Request.PostFormValue(key string) string returns an empty string when key does not exist in the POST body, but also when it exists and its value is empty.
How can I only check if the key is in the POST body, regardless of its value?
Parse the form and then check to see if the key is set in the post form.
req.ParseForm()
hasKey := req.PostForm.Has("key")
Related
I've seen the JSON array questions here and I'm still a little lost, so could use some extra help.
Here's the setup:
My Flow calls a sproc on my DB and that sproc returns this JSON:
{
"ResultSets": {
"Table1": [
{
"OrderID": 9518338,
"BasketID": 9518338,
"RefID": 65178176,
"SiteConfigID": 237
}
]
},
"OutputParameters": {}
}
Then I use a PARSE JSON action to get what looks like the same result, but now I'm told it's parsed and I can call variables.
Issue is when I try to call just, say, SiteConfigID, I get "The output you selected is inside a collection and needs to be looped over to be accessed. This action cannot be inside a foreach."
After some research, I know what's going on here. Table1 is an Array, and I need to tell PowerAutomate to just grab the first record of that array so it knows it's working with just a record instead of a full array. Fair enough. So I spin up a "Return Values to Virtual Power Agents" action just to see my output. I know I'm supposed to use a 'first' expression or a 'get [0] from array expression here, but I can't seem to make them work. Below are what I've tried and the errors I get:
Tried:
first(body('Parse-Sproc')?['Table1/SiteConfigID'])
Got: InvalidTemplate. Unable to process template language expressions in action 'Return_value(s)_to_Power_Virtual_Agents' inputs at line '0' and column '0': 'The template language function 'first' expects its parameter be an array or a string. The provided value is of type 'Null'. Please see https://aka.ms/logicexpressions#first for usage details.'.
Also Tried:
body('Parse-Sproc')?['Table1/SiteconfigID']
which just returns a null valued variable
Finally I tried
outputs('Parse-Sproc')?['Table1']?['value'][0]?['SiteConfigID']
Which STILL gives me a null-valued variable. It's the worst.
In that last expression, I also switched the variable type in the return to pva action to a string instead of a number, no dice.
Also, changed 'outputs' in that expression for 'body' .. also no dice
Here is a screenie of the setup:
To be clear: the end result i'm looking for is for the system to just return "SiteConfigID" as a string or an int so that I can pipe that into a virtual agent.
I believe this is what you need as an expression ...
body('Parse-Sproc')?['ResultSets']['Table1'][0]?['SiteConfigID']
You can see I'm just traversing down to the object and through the array to get the value.
Naturally, I don't have your exact flow but if I use your JSON and load it up into Parse JSON step to get the schema, I am able to get the result. I do get a different schema to you though so will be interesting to see if it directly translates.
I have 2 requests:
1) creating new publication
2) updating it
After the first call I extract $reportId from JSON response. In second request I define a file with JSON data in 'Body Data': ${__FileToString(update_report_json_request.txt,,)}
Inside the file I add extracted reportId:
{"sourceuri":"db://reports/${reportId}"}
But value is not being set, and content from file is sent as it is. How can I pass extracted previously value to the file used for POST data?
Add eval function wrapping the result:
${__eval(${__FileToString(update_report_json_request.txt,UTF-8,)})}
eval function returns the result of evaluating a string expression.
I am creating an API endpoint which contains a file upload field and a few string fields. My goal is to allow clients to clear values on those string fields, i.e. the DB should persist these values as null.
However, due to the fact that the request may contain files, the client should be setting the Content-type header to multipart/form-data. This implies that client cannot send a representation of "null", but can only send an empty string to indicate the intent of clearing the value for a given string field.
Is there a way for grape-api library to know that when it is receiving a multipart request it should be able to nullify blank string values in the params, or is there a better approach to what I am trying to achieve?
Grape.configure do |config|
config.param_builder = Grape::Extensions::Hashie::Mash::ParamBuilder
end
you can override the param builder. extend the default one and override the build_params method or monkey patch it.
params.transform_values {|v| v.eql?('') ? nil : v }
I am getting my request body value in encrypted form as below:
9oF0LS0aY0RGGfUEGoT%2FHSdqypxXKh7lmaTawlekrxw%3D
But the actual value I send is:
9oF0LS0aY0RGGfUEGoT/HSdqypxXKh7lmaTawlekrxw=
Any suggestion How I can get correct value.
Your text has been url encoded. Probably because it was a query parameter ?
What you can do is use the url.QueryUnescape function to decode the value.
str := "9oF0LS0aY0RGGfUEGoT%2FHSdqypxXKh7lmaTawlekrxw%3D"
str, _ = url.QueryUnescape(str)
I am using goRequest http://parnurzeal.github.io/gorequest/ to make some HTTP requests against a server process I need to talk to. The authentication process works like this;
send in a GET request with an authentication header set. No problem there, but I need to grab a header from the response and use a returned value to reauthenticate each following request.
The retuned HTTP header looks like this.
Response headers
map[Location:[900767244] Content-Type:[application/xml] Date:[Fri, 18 Sep 2015 18:19:41 GMT] Server:[Apache] X-Frame-Options:[SAMEORIGIN] Set-Cookie:[JSESSIONID=D5C976F5646365FF030DBAD770DA774C; Path=/; Secure; HttpOnly]]
I need to get that location value as it's my session token going forward. If I grap it like this:
session, ok := response.Header["Location"]
if !ok {
fmt.Println("Did not receive a location header.")
}
fmt.Println("Session: ", session)
I can get it, but it's a slice and NOT a string. How can I get that value as a string so I can pop it back into my request headers going forward? As you can see in the following error:
./login.go:133: cannot use session (type []string) as type string in argument to logoutRequest.Delete
Thanks a lot!
Craig
If you want one value, use the Header's Get method
location := response.Header.Get("Location")
This also canonicalizes the header name for you, so that you still get a value even when using slightly different capitalization.
You only need to index an http.Header value directly when you need to get more than than the first possible value. If you want all values with a canonicalized header name, you can use textproto.CanonicalMIMEHeaderKey
vals := response.Header[textproto.CanonicalMIMEHeaderKey(header)]
The headers have location as an array, you just need to pass Location[0] to that method rather than simply Location because it is a slice. That being said, indexing into the array without checking the bounds is unsafe so you should probably do;
if len(Location) == 1 {
logoutRequest(Location[0])
} else {
// error state
}
One last thing to provide you guidance in the future. You can tell that the response headers object has a type more like this; map[string][]string (in reality that maybe []interface{} but I'm not certain from the output) by seeing that each item inside the outer brackets [] has it's values contained within another set of brackets, meaning it is an array that could contain 0 or more values.